hook strip, fastening laminate comprising the same and method for producing multiple hook strips

专利摘要:
hook strip, fastening laminate comprising the same and method for producing multiple hook strips the present invention relates to a hook strip having a support with a first surface and a length in a first direction; multiple rows of hook elements aligned in the first direction and projecting from the first surface of the support; and slots in the support between at least a few pairs of adjacent rows of the hook elements. the slits can be interrupted by a support closure region, or the slits can be partial slits that penetrate the thickness of the support in a range of 40 to 90 percent. a securing laminate including a carrier and the hook strip described above attached to the carrier is also provided. in some embodiments, the securing laminate includes slits that form separate contiguous portions of the support on the conveyor. an absorbent article containing the hook strip and a method for producing the hook strip are also disclosed.
公开号:BR112012032969B1
申请号:R112012032969
申请日:2011-06-20
公开日:2020-06-09
发明作者:Urban Andreas；E Wood Leigh；Hauschildt Volker
申请人:3M Innovative Properties Co；
IPC主号:

专利说明:

“HOOK STRIP, FASTENING LAMINATE UNDERSTANDING THE SAME AND METHOD TO PRODUCE MULTIPLE HOOK STRIPS”
Background
[001] Hook and loop fastening systems, where the hook member typically includes a plurality of closely spaced vertical projections with heads that interconnect with loops, and the loop member typically includes a plurality of woven, non-woven loops or mesh, are useful for providing removable fixation in numerous applications. For example, hook and loop fastening systems are widely used in disposable wearable absorbent articles to secure such articles around a person's body. In typical configurations, a strip or hook section on a fastening flap attached to the back waist portion of a diaper or incontinence garment, for example, can be attached to a contact area of the loop material in the waist region anterior, or the strip or hook section can be attached to the lower layer (for example, non-woven lower layer) of the diaper or incontinence garment in the area of the anterior waist.
[002] Hook and loop fastening systems can include at least two characteristics of coupling strength: peel strength and shear strength. The resistance to detachment corresponds to the force necessary to disengage the fixation members from each other by detaching one fixation member upwards and away from the other fixation member. The shear strength corresponds to the force required to disengage the fastening members from each other by pulling at least one of the fastening members away from each other in a plane that is parallel to the fastening members. Typically, the engagement resistance of the fastening members is greater in shear than in detachment.
[003] When a user wants to separate the hook and loop fastening members (for example, in an absorbent article like a diaper), typically the
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2/53 user separates the fixing members. The ease with which the fixation members can be detached affects the user's perception of the reliability of the fixation between the fixation members. For example, when a keeper removes a diaper from a baby, if the hookstrap feels as if it detaches very easily from the contact area of the loop or the bottom layer of the diaper, the keeper may question how well the limbs fasteners can keep the diaper closed when in use. And in some cases, a low resistance to detachment can result in inadvertent separation of the fixing members during diaper use.
[004] Despite the progress in hook and loop fastening technology, an improvement in the reliability of the fastening between the fastening members, whether effective or perceived, would be desirable.
summary
[005] The present description features a hook strip comprising slots in a support between the rows of hook elements. The cracks can be interrupted cracks that are interrupted by regions of closure of the support, partial slits that extend only partially through the support, or a combination thereof. The present description also provides a fixing laminate and an absorbent article comprising the hook strip described above or a hook strip with slits in the support between rows of hook elements forming contiguous strips separate from the support in a support. A hook strip disclosed in the present invention in any of these embodiments typically has notoriously high peel resistance compared to a comparative hook strip that is not cracked.
[006] In one aspect, the present description features a hook strip comprising a support having a first surface and a length in one direction of the machine; multiple rows of hook elements aligned in the direction of the
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3/53 machine and protruding from the first surface of the support; and an interrupted slot cut through the support between at least a pair of adjacent rows of hook elements, where the interrupted slot extends towards the machine and is interrupted by at least one intact closing region of the support; where any intact closure regions of the support between a pair of adjacent rows of the hook elements have a combined length in the machine direction of up to fifty percent of the length of the support in the machine direction. In some embodiments, the first surface of the support is provided with partial depth cuts in at least some of the closure regions, where the cuts are collinear with the interrupted slits, but do not extend through the support. In some embodiments, there are interrupted slits cut through the support between at least three pairs of adjacent rows of hook elements, and the number of rows of hook elements between at least some of the interrupted slits varies.
[007] In another aspect, the present description features a hook strip comprising a support having a first surface and a length in a first direction; multiple rows of hook elements aligned in the first direction and projecting from the first surface of the support; an interrupted slot cut through the support between at least a pair of adjacent rows of the hook elements, where the interrupted slot extends in the first direction and is interrupted by at least one intact closing region of the support; and a partial depth cut in at least one intact closing region, where the partial depth cut is collinear with the interrupted gap, but which does not extend through the support. In some embodiments, there are interrupted slits cut through the support between at least three pairs of adjacent rows of hook elements, and the number of rows of hook elements between at least some of the interrupted slits varies.
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[008] In another aspect, the present description features a hook strip comprising a support having a first surface and a length in a first direction; multiple rows of hook elements aligned in the first direction and projecting from the first surface of the support; and interrupted slits cut through the support between at least three pairs of adjacent rows of the hook elements, where each of the interrupted slits extends in the first direction and is interrupted by an intact closing region of the support; where the number of rows of hook elements between at least some of the broken slits varies.
[009] In some embodiments of the aspects mentioned above, there are interrupted slits cut through the support between at least two pairs of adjacent rows of hook elements, where for any two adjacent interrupted slits, the closing regions are misaligned in a second perpendicular direction to the first direction. In some embodiments, there are up to seven rows of hook elements between any two adjacent interrupted slits cut through the support. In some embodiments, any support closure regions between a pair of adjacent rows of hook elements have a combined length in the machine direction or first direction of up to fifteen percent of the length of the support in the machine direction or first direction.
[010] In another aspect, the present description features a hook strip comprising a support having a first surface, thickness and length in a first direction; multiple rows of hook elements aligned in the first direction and projecting from the first surface of the support; and a partial slit cut on the first surface of the support between at least a pair of adjacent rows of the hook elements, where the partial slit extends in the first direction and penetrates the thickness of the support in a range of 40 to 90 percent. in some modalities, there are partial slits cut in the first surface
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5/53 of the support between at least three pairs of hook elements, where the number of rows of hook elements between at least some of the partial slots varies. In another aspect, the present description features a hook strip which comprises a support having a first surface, thickness and length in a first direction; multiple rows of hook elements aligned in the first direction and projecting from the first surface of the support; and partial slits cut on the first surface of the support between at least three pairs of adjacent rows of hook elements, where each of the partial slits penetrates only partially through the thickness of the support, and where the number of rows of hook elements between at least some of the partial cracks vary. In some embodiments, the support can be bent at least 90 degrees in each partial crack at least five times without breaking. In some embodiments, at least one of the partial slits is interrupted by at least one support closure region that is not slit. In other embodiments, at least one of the partial slits penetrates the thickness of the support to a different extent in different regions along the length of the support. In some embodiments, there are a maximum of seven rows of hook elements between any two adjacent partial slots.
[011] In some modalities of any of the aspects mentioned above, the support is not attached to a carrier. In some embodiments, the multiple rows of the hook elements are evenly spaced. In some embodiments when the hook strip is engaged with a loop material, a detachment curve defined by the load versus the extent of detachment generated by detaching the hook strip from the loop material has an area under the curve greater than a comparative detachment curve generated by detaching a comparative hook strip from an equivalent loop material, where the comparative hook strip is equal to the hook strip, except that the hook strip
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Comparative 6/53 has no broken slits or partial slits. In some embodiments when the hook strip is engaged with a loop material, a detachment curve defined by the load versus the extent of detachment generated by detaching the hook strip from the loop material has an area under the detachment curve in the the length of the detachment which is at least 30 percent of the total area under the detachment curve. In some embodiments, when the hook strip is engaged with a loop material and then detached from the loop material at an angle of detachment from 135 to 180 degrees, an angle of detachment from an individual row of hook elements in an distance of a detachment front is greater than an angle of detachment of an individual row of hook elements on a comparative hook strip at the distance of the detachment front when the comparative hook strip is detached from an equivalent loop material, where the comparative hook strip is the same as the hook strip, except that the comparative hook strip has no interrupted or partial cracks.
[012] In another aspect, the present description presents a fastening laminate comprising a conveyor and a hook strip according to any of the aspects or modalities mentioned above, where the support has a second surface opposite the first surface, and where the second surface of the support is joined to a portion of the conveyor.
[013] In another aspect, the present description features a fastening laminate comprising a conveyor; a support having a first surface, a second surface opposite the first surface, a thickness, a length in a first direction, an upper edge and a lower edge, where the second surface of the support is joined with a portion of the carrier; multiple evenly spaced rows of hook elements aligned in the first direction and projecting from the first surface of the support; and slits cut through the support between at least a few pairs of adjacent rows of
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7/53 hook, where each of the slits extends in the first direction from the upper edge to the lower edge of the support to form contiguous strips separate from the support on the conveyor; where at least the portion of the conveyor to which the second support surface is attached has up to ten percent elongation in a second direction perpendicular to the first direction.
[014] In another aspect, the present description features a fastening laminate comprising a conveyor; a support having a first surface, a second surface opposite the first surface, a thickness, a length in a first direction, an upper edge and a lower edge, where the second surface of the support is joined with a portion of the carrier; multiple rows of hook elements aligned in the first direction and projecting from the first surface of the support; and slits cut in the support between at least three pairs of adjacent rows of hook elements, where each of the slits extends in the first direction and forms contiguous portions of the support on each side of the slot, and where the number of rows of hook elements between at least some of the cracks varies; where at least the portion of the conveyor to which the second face of the support is attached has up to ten percent elongation in a second direction perpendicular to the first direction. In some embodiments, each of the slits is cut through the thickness of the support and extends from the top edge to the bottom edge of the support to form contiguous strips separate from the support on the conveyor. In other embodiments, each of the slits is a partial slit cut in the first face of the support that penetrates only partially through the thickness of the support. In other modalities, each of the slits is an interrupted slit that is cut through the support and interrupted by a support closing region, where the support closing region is collinear with the interrupted slit, however it is not cut or penetrates only in a portion of the thickness of the support. In some embodiments, the fixation laminate has a
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8/53 proximal end (for example, for permanent attachment to an absorbent article) and a distal end (for example, for the user to hold), and the number of rows of hook elements between the slits increases from the distal end to the end proximal.
[015] In some embodiments of the previously mentioned aspects of fastening laminates, the conveyor is fibrous, and the second surface of the support is attached to the surface of the conveyor. In some embodiments, when the fastening laminate is engaged with a loop material, a detachment curve defined by the load versus extent of detachment generated by detaching the hook strip from the loop material has a greater area under the curve than a comparative detachment curve generated by detaching a comparative laminate from an equivalent loop material, where the comparative laminate is the same as the fixing laminate, except that the comparative laminate has no cracks. In some embodiments when the securing laminate is engaged with a loop material, a detachment curve defined by the load versus the extent of detachment generated by detaching the securing laminate from the loop material has an area under the detachment curve in the the length of the detachment which is at least 30 percent of the total area under the detachment curve. In some embodiments, when the fastening laminate is engaged with a loop material and then detached from the loop material at an angle of 135 to 180 degrees, an angle of detachment from an individual row of hook elements in an distance of a detachment front is greater than an angle of detachment of an individual row of hook elements on a comparative hook strip at the distance of the detachment front when the comparative hook strip is detached from an equivalent loop material, where the comparative hook strip is the same as the hook strip, except that the comparative hook strip has no slits. In
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In some embodiments, there are at most seven rows of hook elements between any two adjacent slots.
[016] In another aspect, the present description presents an absorbent article that has at least one region of the anterior waist, a region of the posterior waist and a longitudinal central line forking the region of the anterior waist and the region of the posterior waist, where at least one of the anterior waist region or the posterior waist region comprises a fastening laminate according to any of the aspects or modalities mentioned above, and where the machine direction or the first direction of the hook strip is aligned with the center line longitudinal.
[017] In another aspect, the present description presents a method of making strips with multiple hooks, the method which comprises forming a continuous blanket that has a support and multiple rows of hook elements lined up in rows in one direction of the machine and projecting from a first support surface; cut incomplete slits in the machine direction in the support between at least a few pairs of adjacent rows of the hook elements, where the incomplete slits do not divide the support; and cutting complete slits towards the machine through the support, where the complete slits divide the support; where the complete and incomplete slits are positioned so that each of the strips with multiple hooks has at least one incomplete slit cut in the support towards the machine. In some embodiments, incomplete cracks are interrupted cracks that are interrupted by intact closure regions of the support. In some of these modalities, for any two adjacent interrupted cracks, the closure regions are misaligned in a second direction perpendicular to the first direction. In some embodiments, any closing regions between a pair of adjacent rows have a combined length in the machine direction of up to fifty percent of the length of the continuous blanket in the
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10/53 machine direction. In some embodiments, incomplete cracks are partial cracks that penetrate the thickness of the support in a range of 40 to 90 percent. In some embodiments, the continuous mat is not joined to a conveyor mat. In other embodiments, the method further comprises joining the continuous web to a conveyor web. In some of these modalities, the conveyor belt is a fibrous belt, and the lamination comprises reaching heated fluid on a first surface of the fibrous belt while it is in motion; reaching heated fluid on the second surface of the support while the continuous mat is in motion, where the second surface is opposite the first surface of the support; and contacting the first surface of the fibrous mat with the second surface of the support so that the first surface of the fibrous mat is fused to the second surface of the support. In some embodiments, the method further comprises cutting at least one of the multiple strips at an angle to the machine direction to provide an individual hook strip. In some embodiments, the method further comprises providing an absorbent article that has at least one region of the anterior waist and one region of the posterior waist; and positioning the individual hook strip in at least one of the anterior waist region or the posterior waist region of the absorbent article. In some embodiments, the method further comprises stretching the continuous web in at least one direction to provide stretch-induced molecular orientation. In some embodiments, when the hook strip is engaged with a loop material, a detachment curve defined by the load versus the extent of detachment generated by detaching the hook strip from the loop material has an area under the larger curve of the that a comparative detachment curve generated by detaching a comparative hook strip from an equivalent loop material, where the comparative hook strip is equal to the hook strip, except that the comparative hook strip has no incomplete cracks. In some embodiments when the hook strap is engaged with a
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11/53 loop material, a detachment curve defined by the load versus the extent of detachment generated by detaching the hook strip from the loop material has an area under the detachment curve in the middle of the detachment length that is at least 30 percent of the total area under the detachment curve. In some embodiments, when the hook strip is engaged with a loop material and is then detached from the loop material at an angle of detachment from 135 to 180 degrees, an angle of detachment from an individual row of hook elements in a distance from a detachment front is greater than an angle of detachment from an individual row of hook elements on a comparative hook strip at the distance from the detachment front when the comparative hook strip is detached from an equivalent loop material, where the comparative hook strip is the same as the hook strip, except that the comparative hook strip has no incomplete cracks. In some embodiments, there are at most seven rows of hook elements between any two adjacent incomplete slots in the support.
[018] In some of the aspects and modalities mentioned above, the hook elements have projections that interconnect with the loop. In some of these modes, at least a portion of each projection that interconnects with the handle extends at an angle other than zero for the first direction (in some modalities, the machine direction). In some embodiments, the support exhibits molecular orientation induced by stretching in at least one direction (in some embodiments, the machine direction or the first direction). In other embodiments, the support is not extended further than stretching can occur in the machine's direction during extrusion.
[019] In this application, terms such as "one", "one", "a" and "o" are not only intended for reference to a single entity, but include the general class in which a specific example can be used for illustration. The terms "one", "one", "a" and "o" are used interchangeably with the term "at least one". The phrases
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12/53 “at least one of” and “comprises at least one of” followed by a list refer to any of the items on the list and to any combination of two or more items on the list. All numeric ranges are inclusive of their end points and non-integer values between end points unless otherwise specified.
[020] The terms “first (a)” and “second (a)” are used in this description. It should be understood that, except where otherwise specified, these terms are used only in their relative sense. In particular, in some embodiments, certain components may be present in interchangeable and / or identical multiples (for example, pairs). For these components, the designation of “first (a)” and “second (a)” may be applied to the components merely as a matter of convenience in describing one or more of the modalities.
[021] The term "row" refers to the hook elements aligned in a particular direction. The row or line of the hook elements can be substantially straight. When an interrupted gap, a partial gap, a gap, a gap that forms separate contiguous regions of the support or an incomplete gap is cut between adjacent rows of hook elements, this means that the particular gap is not transversal to a row of hook elements. hook.
[022] When it is said that a crack (for example, interrupted crack, a partial crack, a crack that forms separate contiguous regions of the support, or an incomplete crack) "extends" in a particular direction, it is understood that the crack it is arranged or aligned in that direction or at least predominantly in that direction. The gap can be linear. For use in the present invention, a "linear" slot (for example, an interrupted slot, a partial slot, a slot that forms separate contiguous regions of the support, or an incomplete slot) can be defined by two points on a line between two rows of hook elements. The slot can also be substantially linear, which means that the slot can have a slight curvature or light
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13/53 oscillation. A certain oscillation or curvature can result, for example, from the process of splitting a continuous blanket as would be understood by a person skilled in the art. Any oscillation or curvature is such that the slit generally does not have a portion that crosses a row of hook elements. The slot may also have a wavy or serrated pattern with a small span, so that the pattern is generally not transverse to a row of hook elements.
[023] A gap that is cut "through" the support means that the gap cuts across the entire thickness of the support.
[024] The term “multiple” refers to more than one. In some embodiments, a hook strip, fastening laminate, absorbent article, or method according to the present description that has multiple rows of hook elements comprises at least 2, 4, 5, 6, 7, 8, 9, 10 , 12, 14, 15 or 16 rows of hook elements.
[025] The term "hook element", for use in the present invention, refers to male fastening elements that include stems with or without heads that interconnect with loops that have a protrusion. The term "interconnecting in a loop" for use in the present invention refers to the ability of an element and hook to be mechanically attached to a loop material. In general, hook elements with heads that engage in a loop have a head shape that is different from the shape of the rod. For example, the hook element may be in the shape of a mushroom (for example, with a circular or oval head enlarged in relation to the stem), a hook, a palm tree, a nail, a T or a J. AA ability to engage The loop of the hook elements can be determined and defined by using standard woven, non-woven or woven material. A region of the hook elements with heads that engage in a loop will generally provide, in combination with a loop material, at least one of the highest peel strength, highest dynamic shear strength or friction
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14/53 higher dynamics than a region of projections without heads that engage in loop. Hook elements that have "protrusions that interconnect with the loop" or "heads that interconnect with loops" do not include ribs that are precursors to hook elements (for example, elongated ribs that are extruded in profile and subsequently cut to form elements hook by stretching in the direction of the ribs). Such ribs would not be able to engage the loops before being cut and extended. Typically, hook elements that have looping heads have a maximum thickness dimension of up to about 1 (in some embodiments, 0.9, 0.8, 0.7, 0.6, 0.5 or 0 , 45) mm.
[026] The term “machine direction” (MD), as used above and below, denotes the direction of a continuous mat of the support that moves during the manufacture of the hook strip. When a hook strip is cut into smaller portions of a continuous blanket, the direction of the machine corresponds to the length “L” of the hook strip. For use in the present invention, the terms machine direction and longitudinal direction are typically used interchangeably. The term “transverse direction” (DT), as used above and below, denotes the direction that is essentially perpendicular to the direction of the machine. When a hook strip is cut into smaller portions of a continuous web, the direction of the machine corresponds to the width "W" of the hook strip.
[027] For some modalities, the cracks (for example, partial cracks) are said to penetrate the thickness of the support in a certain percentage range. The penetration percentage can be calculated as the depth of the gap divided by the thickness of the support, with the quotient multiplied by 100.
[028] The term “non-woven”, when referring to a blade or blanket, means that the item has a structure of individual fibers or threads that are interposed, but not identifiable as in a mesh cloth. Non-woven materials or blankets
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15/53 can be formed from various processes such as blowing spin processes, continuous spinning processes, hydroentanglement spinning processes, and carded filament blanket processes.
[029] The term “elastic” refers to any material that exhibits recovery from stretching or deformation. Similarly, the term "inelastic" refers to any material that does not exhibit recovery from stretching or deformation.
[030] “Elongation” in terms of percentage refers to {(the extended length - the initial length) / the initial length} multiplied by 100.
[031] The term “bonded to the surface”, when referring to the bonding of fibrous materials, means that parts of the fiber surfaces of at least portions of the fibers are bonded by melting to the second surface of the support, in such a way as to substantially conserve the original (pre-bonded) shape of the second surface of the support, and to preserve substantially at least some portions of the second surface of the support in an exposed condition, in the area attached to the surface. Quantitatively, fibers attached to the surface can be distinguished from embedded fibers by the fact that at least about 65% of the surface area of the fiber bound to the surface is visible above the second surface of the support in the bonded portion of the fiber. Inspection of more than one angle may be necessary to view the entire surface area of the fiber.
[032] The term “bond retaining wrap”, when referring to the bonding of fibrous materials, means a bonded fibrous material that comprises a wrap that is at least 80% of the wrap displayed by the material before, or in the absence of the wrapping process. Link. The wrapping of a fibrous material, for use in the present invention, is the ratio between the total volume occupied by the mat (including fibers, as well as interstitial spaces of the material that are not occupied by the fibers) and the volume occupied only by the fiber material. If only a portion of a fibrous mat has the second support surface attached to it, the retained wrap can be easily ascertained by comparing the fibrous mat wrap in the bonded area with that of the mat in a non-matted area.
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16/53 on. It may be convenient, in some circumstances, to compare the wrapper of the bonded mat with that of a sample of the same mat before being bonded, for example, if the entire fibrous mat has the second support surface attached to it.
[033] The summary above the present description is not intended to describe each modality presented or all the implementations of the present description. The following description more particularly illustrates the illustrative modalities. It should be understood, therefore, that the following drawings and description are for illustrative purposes only and should not be read in such a way as to unduly limit the scope of this description.
Brief Description of Drawings
[034] The description can be understood in a more complete way taking into account the detailed description below of the different modalities of the description together with the attached drawings.
Figure 1 is a top view of an exemplary hook strip according to the present description;
Figure 1A is a cross-sectional side view taken along line 1AB-1AB of figure 1 for a hook strip embodiment according to the present description;
Figure 1B is a cross-sectional side view taken along line 1AB-1AB of figure 1 for another embodiment of a hook strip according to the present description;
Figure 2 is a top view of another exemplary hook strip according to the present description;
Figure 2A is a cross-sectional side view taken along line 2AB-2AB of figure 2 for some embodiments of a hook strip according to the present description;
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Figure 2B is a cross-sectional side view taken along line 2AB-2AB of figure 2 for other embodiments of a hook strip according to the present description;
Figure 3 is a top view of another exemplary hook strip according to the present description;
Figure 4 is a top view of another exemplary hook strip according to the present description;
Figure 4A is a cross-sectional side view taken along line 4A-4A of figure 4; and
Figure 5 is a top view of an example fixing laminate according to the present description;
Figure 5A is a cross-sectional side view taken along line 5A-5A of figure 5;
Figure 6 is a top view of another example fixing laminate according to the present description;
Figure 7 is a perspective view of an absorbent article that incorporates a hook strip according to the present description;
Figure 7A is an example cross-sectional side view taken along line 7A-7A of figure 7;
Figure 8 is a detachment curve from a comparative slit fastener being removed from an interlaced loop;
Figure 9 is a detachment curve of a fastening laminate including a specimen of Hook Strip Example 1 being removed from an interlaced loop;
Figure 10 is a detachment curve of a comparative fixation laminate, without slit being removed from a non-woven lace material;
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Fig. 11 is a detachment curve of a fixture laminate including a specimen of Hook Strip Example 1 being removed from a nonwoven loop material;
Fig. 11A is a detachment curve of a fixture laminate including a specimen of Hook Strip Example 2 being removed from a nonwoven loop material;
Figure 12 is a photograph of a comparative slit-free laminate, as it is detached from a non-woven lace material; and
Figure 13 is a photograph of a fastening laminate including a hook strip according to the present description as it is detached from a non-woven lace material.
Detailed Description
[035] A detailed reference will now be made to various modalities of the present description, of which one or more examples are illustrated in the drawings. The features illustrated or described as part of one embodiment can be used with other embodiments to provide a third embodiment as well. It is intended that the present description includes these and other modifications and variations.
[036] Figure 1 illustrates a hook strip 10 according to some embodiments of the present description. The hook strip 10 has a support 14 with multiple rows 16 of the hook elements 12 projecting from a first surface of the support 14. The first surface of the support is the surface that is visible in figure 1. The first surface can also be called of the first main surface in any of the embodiments presented in the present invention. The multiple rows 16 are aligned in at least one first direction; in the illustrated embodiment, the rows 16 of the hook elements 12 are aligned in the longitudinal direction L. The interrupted slits 20a are cut in the support between some pairs of adjacent rows 16 of hook elements 12. It should be understood in general that when
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19/53 the slits are cut between at least a few pairs of adjacent rows 16, there are at least two slits in the support 14. The interrupted slits 20a are linear in the same "L" direction as the multiple rows 16 and extend from the upper edge 18 to the lower edge 28 of the support 14. The interrupted slits are interrupted by intact closing regions 22 of the support 14. The closing regions 22 are regions where the support is not cut, and they are collinear with the interrupted slot 20a. In the illustrated embodiment, the interrupted slits 20a are not evenly spaced between the rows of the hook elements 12. There are three rows 16 of the hook elements 12 between some interrupted slits in an adjacent position 20a, and a row 16 of the hook elements 12 among others. interrupted cracks in an adjacent position 20a. Additionally, in the illustrated embodiment, the closing regions 22 are misaligned in a "W" direction perpendicular to the "L" direction of the interrupted slits 20a.
[037] A cross section taken through the hook strip 10 of figure 1 in line 1A, 1B-1A, 1B, which extends through interrupted slits in the slit regions, not in the closing regions, is shown in figure 1A. The interrupted slits 20a extend through the support 14. The interrupted slits 20a are made without removing material from the hook strip, but are shown out of scale in figure 1A to make them more easily visible. In other words, the multiple portions of the support 14 on either side of the interrupted slots 20a are in contiguity and are not spaced.
[038] The interrupted cut shown in figure 1 to leave closing regions can also be performed in modalities that have partial slits as shown in figure 1B. In figure 1B, the partial slits 20b are cut in the first face of the support 14 (that is, the same face from which the hook elements 12 protrude) between some pairs of adjacent rows 16 of the hook elements 12. In the illustrated embodiment, the partial slots 20b are interrupted by the closing regions 22 of the support 14 which are not slit. Partial cracks
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20b penetrate the thickness of the support 14 in a range of 40 to 90 percent. Again, in this embodiment, the partial slits 20b are typically made without removing material from the hook strip, but are shown off-scale in Figure 1B to make them more easily visible.
[039] Another embodiment of a hook strip 10 according to the present description is illustrated in figure 2. In this embodiment, two adjacent interrupted slits 20a have two rows 16 of hook elements 12 between them. In addition, in figure 2, the closing regions 22 are aligned in a "W" direction perpendicular to the direction of the interrupted slits 20a.
[040] Exemplary cross sections taken through the hook strip 10 of figure 2 in line 2A, 2B-2A, 2B, which extend through the aligned closing regions 22, are shown in figures 2A and 2B. In figure 2A, the support 14 in the closing regions 22 is not cut. In figure 2B, there are partial depth cuts 24 in the support 14 in the closing regions. The partial depth cuts 24 do not extend through the support and are collinear with the interrupted slits 20a. The partial depth cuts 24 can penetrate the thickness of the support 14 up to 5, 10, 20, 30, 40, 50, 60, 70, 80 or 90 percent.
[041] Another embodiment of a hook strip 10 according to the present description is illustrated in figure 3. In this embodiment, there are interrupted cracks 20a between each row 16 of hook elements 12. In figure 3, the closing regions 22 are misaligned in a "W" direction perpendicular to the direction of the interrupted slits 20a, although in other embodiments, the closure regions 22 may be aligned. The support 14 in the closing regions 22 can be uncut, as shown above in figure 2A, or they can be cut as shown above in figure 2B. The interrupted slits 20a are cut through the support, but the slit pattern of figure 3 can also be useful when partial slits are used.
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The partial slits do not cut through the support, but penetrate the thickness of the support 14 in a range of 40 to 90 percent, as shown in figure 1B.
[042] An embodiment of a hook strip 10 according to the present description that has partial slits 20b is shown in figure 4. In figure 4, a hook strip 10 has a support 14 with multiple rows 16 of the hook elements 12 protruding from a first support surface 14. The multiple rows 16 are aligned in at least one first direction; in the illustrated embodiment, the rows 16 of the hook elements 12 are aligned in the longitudinal direction "L". Partial slits 20b are cut in the holder between some pairs of adjacent rows 16 of the hook elements 12. Partial slits 20b are linear in the same direction as the multiple rows 16 and, in the illustrated embodiment, they are evenly spaced between rows 16 of the hook elements 12. The number of rows 16 of hook elements 12 between partial slits in adjacent position 20b can be modified as shown in figures 1, 2 and 3.
[043] A cross section taken through the hook strip 10 of figure 4 on line 4A-4A is shown in figure 4A. Partial slits 20b do not cut through support 14, but rather penetrate the thickness of support 14 in a range of 40 to 90 percent. When the partial slits 20b penetrate the thickness of the support 14 in a range of 40 to 90 percent, the partial slits allow flexing between the adjacent rows 16 of the hook elements 12, however the support 14 is not easily broken. In some embodiments, the partial slots 20b penetrate the thickness of the support 14 in a range of 50 to 90, 50 to 85, 55 to 85, 60 to 80 or 65 to 80 percent.
[044] For any of the hook strip modalities illustrated in figures 1 to 4, the multiple rows 16 of the hook elements 12 can be evenly spaced. For multiple rows 16 that are evenly spaced, the spacing (for example, the distance in the “W” direction) between rows
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22/53 multiples 16 can be different by up to 10, 5, 2.5 or 1 percent. In addition, in some embodiments, including any of the embodiments described above in conjunction with figures 1 to 4, the support 14 has an upper edge 18 and a lower edge 28 and the interrupted slits 20a or partial slits 20b extend from the edge top 18 to the bottom edge 28 of the holder.
[045] For any of the hook strip modalities illustrated in figures 1 to 4, the hook strip can be in the form of a cylinder, from which hook sections are cut to a size suitable for the desired application. In this application, the hook strip can also be a section that has been cut to a desired size. The closing regions 22 interrupting the interrupted slits 20a allow the hook strip to be handled as an integral unit. Similarly, since the partial slots 20b do not extend through the support 14, the hook strip 10 of figure 4 can be handled as an integral unit. The closure regions 22 in any of the modalities that contain them or the uncut portion of the support in the modalities that have partial slits allow the hook strips according to the present description to be handled in the form of a cylinder and to be converted as desired. Consequently, in some embodiments, support 14 is not attached to a conveyor, at least when it is initially formed. When support 14 is not attached to a conveyor, it can mean that the support is not laminated (e.g., extruded laminated), adhered, bonded (e.g., ultrasound or compacted) or otherwise attached to a conveyor (for example, a substrate, fixing tab, fixing tape, etc.). Since, in some embodiments, the hook strip according to the present description can be made without being attached to a conveyor, there is great flexibility in how the hook strip can be converted and subsequently attached to an article to be fixed.
[046] On the other hand, the hook strip according to the present description can be useful in a fixing laminate. The fixing laminate can be a fixing flap
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23/53 comprising the hook strip shown in the present invention in any of the aforementioned embodiments, or the fixing laminate may comprise a hook strip attached to the bottom layer of an absorbent article. In some embodiments, the fixation laminate is useful for joining the anterior waist region and the posterior waist region of an absorbent article. The securing laminate may comprise a carrier and a hook strip shown in the present invention, the second surface of the hook strip (i.e., the opposite face of the hook elements) being attached to the carrier. The hook strip can be attached to a carrier, for example, by lamination (for example, extrusion lamination), adhesives (for example, pressure sensitive adhesives), or other bonding methods (for example, ultrasound bonding, bonding compaction or surface bonding).
[047] The carrier can be continuous (that is, without any through holes) or discontinuous (for example, comprising perforations or penetrating through pores). The carrier can comprise a variety of suitable materials including fabric blankets, nonwoven blankets (e.g., continuous spinning blankets, hydro-interwoven blankets, air-laid blankets, meltblown blankets), and blankets of carded filaments), textile products, plastic films (for example, single or multilayer films, coextruded films, laterally laminated films or films comprising layers of foam), and combinations thereof. In some embodiments, the carrier is a fibrous material (for example, a woven, non-woven or interlaced material). In some embodiments, the carrier comprises multiple layers of non-woven materials with, for example, at least one layer of a meltblown nonwoven and at least one layer of a continuously spinning nonwoven, or any other combination. of non-woven materials. For example, the conveyor may be a multi-layer material of continuous spinning-bonded by continuous-spinning, continuous spinning-continuous spinning or
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24/53 continuous spinning-continuous spinning-continuous spinning. Or the carrier may be a composite mat comprising a layer of nonwoven and a layer of dense film.
[048] Fibrous materials that provide useful carriers can be produced from natural fibers (for example, wood or cotton fibers), synthetic fibers (for example, thermoplastic fibers), or a combination of natural and synthetic fibers. Exemplary materials for forming thermoplastic fibers include polyolefins (for example, copolymers of polyethylene, polypropylene, polybutylene, ethylene, propylene copolymers, butylene copolymers and copolymers and mixtures of these polymers), polyesters and polyamides. The fibers can also be multi-component fibers, for example, which have a core of a thermoplastic material and a wrap of another thermoplastic material.
[049] useful carriers can have any weight basis or suitable thickness that is desired for a particular application. For a fibrous carrier, the weight basis can vary, for example, from at least about 20, 30, or 40 grams per square meter, to about 400, 200 or 100 grams per square meter. The carrier can be up to about 5 mm, about 2 mm or about 1 mm and / or at least about 0.1, about 0.2, or about 0.5 mm thick.
[050] One or more zones of the conveyor may comprise one or more elastically extensible materials that extend in at least one direction when a force is applied and returning to approximately its original dimensions after the force is removed. However, in some embodiments, at least the portion of the conveyor attached to the second face of the support is not extensible. In some embodiments, the portion of the conveyor attached to the second face of the support will have up to 10 (in some embodiments, up to 9, 8, 7, 6 or 5) percent elongation in the transverse direction in the direction perpendicular to the slits (ie width direction (W).
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[051] An embodiment of a fixing laminate 40 according to the present disclosure is illustrated in figure 5. The fixing laminate 40 comprises conveyor 45 and hook strip 50. The hook strip has a support 54 with a first surface that has hook elements 52 protruding from it and a second surface (not shown) joined to the conveyor 45. In the illustrated embodiment, the hook elements 52 are in multiple evenly spaced rows 56 aligned in the first direction, the longitudinal direction "L" . Slots 20c are cut through the support 54 (that is, across the entire thickness of the support) between at least a few pairs of adjacent rows 56 of the hook elements 52. The slits 20c are linear in the direction of the rows 56 and extend from the upper edge 48 to lower edge 58 of the holder to form separate contiguous strips of the holder 54 on the conveyor 45.
[052] A cross section taken through laminate 40 in figure 5 on line 5A-5A is shown in figure 5A. Slits 20c cut through the support 54 but not the conveyor 45. Slits 20c are made without removing material from the hook strip, but are shown out of scale in figure 5A to make them more easily visible. In other words, the multiple strips of the support 54 are contiguous and not spaced apart.
[053] Another fixing laminate 40 according to the present description, which comprises conveyor 45 and hook strip 50, is illustrated in figure 6. Fixing laminate 40 can be a fixing flap (for example, in an article absorbent) with the first edge 41 which may be at the end of the manufacturer's fixing flap (i.e. the end that is permanently attached to the absorbent article, usually in the waist region) and an opposite opposite edge 43 which may be at the end of the user of the fixing tab (that is, the end that is gripped by the user). In the embodiment illustrated in figures 6, the conveyor 45 is shaped so that the second edge 43 is narrower in the longitudinal direction "L" than the first edge 41. The hook strip shape 50 corresponds to the shape of the conveyor 45 with
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26/53 a second edge 53 narrower in the longitudinal direction "L" than a first edge 51. Again the second edge 53 of the hook strip 50 may be at the user's end of the fastening tab, and the first edge 51 may be at the end of the flap permanently attached to the article. Like the embodiment illustrated in figure 1, the spacing of the interrupted slits 20a in the hook strip 50 is such that the number of rows 56 of the hook elements 52 between the interrupted slits 20a varies. It should be understood that for the number of rows of hook elements between the interrupted slots to vary, there must be at least three slots in the support. In the fixing laminate 40, the number of rows 56 of the hook elements 52 is less for the second edge 53 and greater for the first edge 51. For example, in the illustrated embodiment, there is a row 56 of hook elements 52 between the slits interrupted in an adjacent position 20a near the second edge 53 of the hook strip 50. As the length of the hook strip 50 increases towards the first edge 51 of the hook strip 50, the number of rows 56 of the hook elements 52 between interrupted slits in an adjacent position 20a it increases to 2, then 3 and then 4. Although the illustrated embodiment shows the interrupted slits 20a, which could have closure regions in support 54 that are cut or not as shown in figures 2A or 2B, the shape of the hook strip and the configuration of the slits and rows 56 is also applicable in the modalities containing partial slits 20b like those shown in figure 4, and the slits 20c through the support that are not interrupted by re intact closing regions, as shown in figure 5.
[054] The adaptation of the number of rows 16, 56 of the hook elements 12, 52 between adjacent slots is useful for adapting the detaching force of the hook strip shown in the present invention. As further described below in conjunction with figures 8-11, the peel force is typically lower to a low extent when
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27/53 hook and loop are separated by detachment. A smaller number of rows of hook elements between the slits can therefore be very advantageous at the end of a fastening laminate where detachment is initiated. The number of rows of hook elements between the slits may gradually be suitable for the rear edge of the fastening laminate, where the peeling force is typically higher. This adaptation can be particularly advantageous, for example, in shaped fixture laminates like those shown in figure 6. In the fixture laminate 40 of figure 6, the detachment of the fixture laminate starts at the second narrowest edge, 43, where there is less hook elements 52 for engaging a loop.
[055] The fixing laminates shown in the present invention are useful, for example, in absorbent articles. Absorbent articles according to the present description have at least one region of the anterior waist, a region of the posterior waist and a longitudinal central line that forks the region of the anterior waist and the region of the posterior waist, with at least one of the region of the the anterior waist or the posterior waist region comprises the fixation laminate shown in the present invention. The securing laminate may be in the form of a securing flap that is attached to at least one of the anterior waist region or the posterior waist region extending outwardly from at least one of the left longitudinal edge or the longitudinal right edge of the absorbent article. In other embodiments, the securing laminate may be a portion of the integral flaps of the absorbent article. In these embodiments, the first direction (in some embodiments, the machine direction) of the hook strip is generally aligned with the longitudinal center line of the absorbent article.
[056] Figure 7 is a schematic perspective view of a specific embodiment of an absorbent article in accordance with the present description. The absorbent article is a diaper 60 which is essentially hourglass-shaped. The diaper
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28/53 comprises an absorbent core 63 between a liquid-permeable top layer 61 that comes into contact with the user's skin and an outwardly facing liquid-impervious back sheet 62. Diaper 60 has a back waist region 65 that it has two fixing tabs 70 arranged on the two longitudinal edges 64a, 64b of the diaper 60. The diaper 60 can comprise an elastic material 69 along at least a portion of the longitudinal side edges 64a and 64b to provide leg clamps. The longitudinal direction "L" of the absorbent article (for example, diaper 60) refers to the direction that the article extends from the front to the back of the user. Therefore, the longitudinal direction refers to the length of the absorbent article between the region of the posterior waist 65 and the region of the anterior waist 66. The lateral direction of the absorbent article (for example, diaper 60) refers to the direction that the article extends from the left side to the right side (or vice versa) of the user (that is, from the longitudinal edge 64a to the longitudinal edge 64b in the form of figure 7).
[057] In figure 7, the fixing tabs 70 are fixed through their ends of the manufacturer 70a to the region of the posterior waist 65. The end of the user 70b of the fixing tab comprises a hook strip 80 according to the present description . The configuration of the hook strip 80 shown in figure 7 is similar to that shown in figure 2, where they are interrupted slits 20a between at least some parts of adjacent rows of hook elements, and where the closing regions 22 are aligned. However, the hook strip 80 can also be similar to that shown in any of the figures 1 to 6. In some embodiments, when attaching the diaper 60 to the user's body, the ends of the user 70b of the fixing tabs 70 can be attached to a target area 68 which comprises fibrous material 72 which can be disposed at the rear 62 of the anterior waist region 66. Examples of loop tapes which can be applied to the target area 68 to provide exposed fibrous material 72, are presented, for example, in US Patent No. 5,389,416 (Mody et al.) EP 0.341,993 (Gorman et al.) and EP 0.539.504 (Becker et al.). In other modalities, the sheet
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29/53 of the rear part 62 comprises a fibrous layer of woven or non-woven fabric which is capable of interacting with the ends of the user 70b of the tape flaps 70 which comprise a hook strip shown in the present invention. Examples of such backsheet sheets 62 are shown, for example, in US patent no. 6,190,758 (Stopper) and 6,075,179 (McCormack et al.). Advantageously, with the improved detachment of the hook strip according to the present description, adequate fixation between the hook strip 70 and the backing sheet 62 may be possible, allowing the elimination of the target area 68.
[058] An exemplary cross section of the fixation tab 70 taken through line 7A-7A in figure 7 is shown in figure 7A. The fixation tab 70 has an end of the manufacturer 70a to fix it to the back waist region of the diaper 65, and a user end 70b that comprises the hook strip 80. The fixation tab 70 generally extends beyond the longitudinal edges 64a, 64b of diaper 60. The end of the manufacturer 70a corresponds to the part of the fixing flap 70 that is attached or attached to the diaper 60 during the manufacture of diaper 60. The end of the user is typically gripped by the user when attaching the diaper 60 to the user and is typically not attached to the diaper during manufacturing.
[059] In the embodiment illustrated in figure 7A, the fixation tab 70 comprises a conveyor 75 with adhesive 76 for the end of the user. The adhesive 76 joins the second face of the hook strip holder 80 to the carrier 75 and can be used to attach the carrier 75 to the back waist region 65 of the diaper. Optional exposed Adhesive 77 may be present between the hook strip 10 and the back waist region of the diaper 65. The fixing tab 70 still optionally comprises the release strip 79 to bring the exposed part of adhesive 77 into contact when the hook strip 80 is folded over the back waist region of the diaper 65 (for example, during packaging and transportation of the diaper 60). The release strip 79 can also be attached to the back waist region of diaper 65 using adhesive 76. Other
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30/53 configurations of the release tape 79 are also possible depending on the configuration of the attachment flap 70 to the diaper 60. The conveyor 75 at the user end 70b of the fixation flap 70 can exceed the length of the hook strip 80 and the adhesive 76, thus providing a digital elevator.
[060] Although the embodiment illustrated in figure 7 is an absorbent article with attached fastening tabs, it is envisaged that the hook strip disclosed in the present invention could be equally useful in absorbent articles with larger hook areas. For example, the ears of the absorbent article itself comprise hooks or the absorbent article may have two target zones of loop material along the longitudinal edges of the back sheet in a region of the waist and two hook strips that extend along the longitudinal edges of the absorbent article in the opposite waist region.
[061] For the modalities that comprise closing regions 22 (for example, modalities as those illustrated in figures 1, 2, 2A, 2B, 3, 6 and 7), the closing regions 22 can have the same thickness as the support (for example, as in figure 2A) or they may be thinner than the support 14. For example, the closing region 22 may have partial depth cuts 24, as described above in conjunction with figure 2B, so that the closure region 22 is thinner than support 14.
[062] As described above, the closure regions 22 are useful in modalities that include slits interrupted through the support 14 (i.e., through the entire thickness of the support). The closure regions 22 are also useful in modalities that include partial slits that penetrate the thickness of the support in a range of 40 to 90 percent. In these embodiments, the closure regions can be cut or cut to less than 40 percent of the thickness of the support. For any of these modalities, several lengths of the closing regions 22 can be useful. In some
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31/53 modalities, any closure regions between a pair of adjacent rows have a combined length in the first direction of up to 50 (in some embodiments, 40, 30, 25, 20, 15 or 10) percent of the length of the support in the first direction. In some embodiments, to maximize the ability of the hook strip to flex, it may be desirable to minimize the combined length of the closure regions in the first direction. Minimizing the combined length of closure regions 22 in the first direction can be accomplished by at least one of minimizing the length of any particular closure region in the first direction or maximizing the distance between closure regions 22 on a hook strip. In some embodiments, the length of a closure region in the first direction is up to 3, 2 or 1.5 mm and at least 0.25, 0.5 or 0.75 mm. In some embodiments, the number of closure regions along the length of the hook strip in the first direction is up to 1.5, 1.25, 1.0, 0.75, 0.60 or 0.5 per cm. The distance between the closing regions 22 in the first direction can be, for example, at least 0.75, 1.0, 1.25, 1.5 or 1.75 cm. In addition, the length of the interrupted gap or partial gap between the closure regions can be adjusted and is typically selected to maximize the distance between the closure regions. In some embodiments, the length of the interrupted or partial gap between the closure regions is at least 8 (in some embodiments, at least 10, 12, 14, 15, 16, 17, 18, 19 or 20) mm. Typically, the broken slits disclosed in the present invention have longer slit regions and shorter closing regions than the perforations that are designed to allow for easy separation of two parts of a film.
[063] The maximization of the distance between the closing regions on a hook strip can be accomplished, in some modalities, by the misalignment of the closing regions as shown in figures 1.3 and 6. For example, again with reference to figure 6 , the closing regions 22a and 22b are in a way
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32/53 substantial, evenly spaced in the first “L” direction but are misaligned in the second “W” direction, perpendicular to the first direction. The closing regions 22a and 22b are misaligned so that the closing region 22b is located substantially midway between the closing regions 22a in the first "L" direction. When the closure regions are misaligned in this way, the number of closure regions required to make the hookstring cable as an integral unit is minimized. In the hook strip 50 for the clamping flap laminate 40, the number of closing regions 22a and 22b in the interrupted slots 20a alternates between two closing regions 22a and a closing region 22b through the hook strip 50.
[064] For any of the modalities of the hook strips, the fixing laminates or absorbent articles disclosed in the present invention or the methods of the present invention for making the same, the number of cracks (i.e., broken cracks, partial cracks, cracks incomplete or crevices forming contiguous strips separate from the support) can be adjusted depending on the requirements of the application. In some embodiments, there are up to 10, 9, 8, 7, 6, 5, 4, 3, 2 or 1 crack per 10 mm (ie, broken cracks, partial cracks, incomplete cracks or cracks that form contiguous strips separated from the support ) across the width of the strip (that is, in a “W” direction substantially perpendicular to the first or machine direction). As shown in the examples below, the number of cracks (ie, broken cracks, partial cracks, incomplete cracks or cracks that form contiguous strips separated from the support) in a hook strip according to the present description can affect the peeling force that can be reached, with the area under a detachment curve increasing with the number of slits through the hook strip.
[065] The change in the number of cracks through the hook strip is related to the number of rows of hook elements between any two cracks
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33/53 adjacent, depending on the density of the hook elements on the hook strip. For a hook strip, fastening laminate, absorbent article or method according to the present description, the density of the hook elements 12 in the support 14 is in a range of 20 per cm ² to 1000 per cm ² (in some embodiments, in a range of 20 per cm ² to 500 per cm ² , 50 per cm ² to 500 per cm ² , 60 per cm ² to 400 per cm ² , 75 per cm ² to 350 per cm ² or 100 per cm ² to 300 per cm ² ). Advantageously, since the slits are between adjacent rows of hook elements, incorporating the slits in the hook strips disclosed in the present invention does not decrease the density of the hook elements. For any of the modalities of the hook strips, the fixing laminates or absorbent articles disclosed in the present invention or the methods for making the same, the number of hook elements between any two adjacent slits (i.e., broken slits, partial slits , incomplete cracks or cracks that form contiguous strips separated from the support) can be adjusted depending on the requirements of the application. In some embodiments, there are up to 10, 9, 8, 7, 6, 5, 4, 3, 2 or 1 row of hook elements between any two adjacent slots (that is, broken slits, partial slits, incomplete slits or slots that form contiguous strips separated from the support). In some embodiments, the rows of hook elements and slits alternate through the hook strip (that is, there is a gap between each row of the hook elements).
[066] Various shapes of hook elements can be useful to practice the present description. In some embodiments, all hook elements have projections that interconnect with the loop. In some of these modes, at least a portion of each protrusion that interconnects with the loop extends at an angle other than zero to the first direction (in some modalities, the direction of the machine), which also means that at least a portion each protrusion that interconnects with the loop extends at an angle other than zero
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34/53 for broken cracks, partial cracks, cracks or incomplete cracks. The non-zero angle can be in the range of 30 to 90 degrees, from 50 to 90 degrees, from 60 to 90 degrees, from 75 to 90 degrees, from 80 to 90 degrees, or from 85 to 90 degrees. The improved detachment performance that is observed for the hook strips disclosed in the present invention can be more pronounced when at least a portion of each protrusion that interconnects with the loop extends in a direction opposite to the direction in which the hook strip is. unglued. Consequently, in an absorbent article disclosed in the present invention, at least a portion of each of the projections that interconnect with the loop can be directed towards the longitudinal center line of the absorbent article when the absorbent article is fixed around the body. In some embodiments, each hook element has projections that interconnect with loop that extend in multiple (that is, at least two) directions. For example, the hook element may be in the shape of a mushroom, a nail, a palm tree or a T. In some embodiments, the hook element comprises a stem with a mushroom head (for example, with an oval or round cover) ).
[067] Figure 8 illustrates a detachment curve (that is, load in grams force vs. extent of detachment in inches) of a fastening tab with a comparative hook strip being removed from an interlaced loop. The comparative hook strip is a conventional hook strip that does not have any cracks (i.e., interrupted cracks, partial cracks, complete cracks or incomplete cracks) in the support. Details of the preparation of the fixation tab and the test method are given in the Examples, below. The low extension load is very low (for example, up to about 50 grams) and increases as the detachment progresses until the force reaches the peak near the end of the hook section width. A similar result is obtained when evaluating the detachment of a comparative hook strip against the extruded bonded loop as the loop material, as shown in figure 10.
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[068] Figures 8 and 10 illustrate that, for the conventional hook strip, a substantially constant increase in the peeling force is necessary as the hook strip is removed from a loop material. The initial force required to remove the flap from the toilet article is relatively low, which can affect the actual perceived reliability of the closure components. Likewise, since increasing force is required until the closure components are completely separated, the amount of force required to separate the closure components may not be readily apparent to the user. The user may also experience an unpleasant sensation when the hook strap is suddenly released from the loop material.
[069] Figure 9 illustrates a detachment curve (that is, load in grams of force vs. extent of detachment in inches) of a fastening tab with a hook strip according to the present description being removed from an interlaced loop . The hook strip is the same size as the comparative hook strip, the results of which are shown in figure 8, meanwhile 7 interrupted slits have been cut in the support between some rows of hook elements. They were 2 rows of hook elements between any two adjacent broken slits. Details of the preparation of the fixation tab and the test method are given in the Examples, below. The detachment force is much more consistent from the beginning to the end of the detachment process and is at a much higher level of force compared to the detachment shown in figure 8. A similar result is obtained when evaluating the detachment of the stripping hook strip. according to the present description against the extrusion bonded loop as the loop material as shown in figures 11 and 11A. For the specimen that generated the data shown in figure 11, there were 2 rows of hook elements between any two adjacent interrupted slits and, for the specimen that generated the data shown in figure
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11A, there were 4 rows of hook elements between any two broken slits.
[070] As shown in figures 8 to 11A, a detachment vs. force curve. detachment extension has an area under the curve. In some embodiments of the hook strip disclosed in the present invention, when the hook strip is connected with a loop material, a detachment curve defined by the load versus extent of detachment generated by detaching the hook strip from the loop material has a larger area under the curve than a comparative detachment curve generated by detaching a comparative hook strip from an equivalent loop material, where the comparative hook strip is equal to the hook strip, except that the hook strip Comparative has no cracks (for example, no interrupted cracks, partial cracks, incomplete cracks or complete cracks depending on the modality). In some embodiments, the area under the curve for the hook strip according to the present description is at least 20, 30, 40 or 50 percent greater than the area under the curve for the comparative hook strip. A comparative hook strip is "equal" to the hook strip disclosed in the present invention, except that it has no slits. The comparative hook strip has the same dimensions (for example, height, width and thickness), the same hook density, the same shape and dimensions of the hook head, the same hook configuration (for example, rows), and is made from the same material as the hook strip disclosed in the present invention. An “equivalent” loop material refers to a loop material that is similar or equal (for example, in terms of material, loop construction (for example, knitted, woven or non-woven), and dimensions (for example , height, width and thickness)) that a loop material from which a hook strip according to the present description is detached before being subjected to detachment assessment.
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[071] It is evident from the comparison between figures 8 to 11A that the force required to remove a hook strip according to the present description is typically, in many embodiments, more uniform throughout the length of the detachment than for a comparative hook strip. In some embodiments, the area under the curve at half the length of the detachment is at least 30, 35, 40 or 45 percent of the total area under the curve. In some modalities, at least 200 grams of strength is achieved in the first quarter, third or half of the length of the detachment. In some embodiments, at least one peak in the first quarter, one-third or half of the length of the detachment has a value that is at least 50, 60, 70 or 75 percent of the maximum peak value. In addition, in some embodiments, at least a few points along the curve up to half the length of the maximum detachment, the detachment force required to remove the hook strip according to the present description of a loop material is at least 20, 30, 40 or 50 percent, greater than the peeling force required to remove a comparative hook strip from an equivalent loop material. The comparative hook strip is the same as the hook strip disclosed in the present invention, except that it has no cracks.
[072] Improvements to a conventional hook strip to increase the area under the detachment curve may have conventionally involved the use of more aggressive hooks, for example. More aggressive hooks can lead to a higher maximum load without changing the typical detachment curve of the conventional hook strip that is shown in figures 8 and 10. More aggressive hooks that provide higher maximum loads can increase damage (for example, embolization or fiber breakage) for, for example, a nonwoven lace material, which can inhibit the rewiring of the lace material. On the contrary, for a hook strip according to the present description, the area under the detachment curve can be increased without increasing the maximum load providing a greater load on the extensions up to half of the extension of the maximum detachment. That way, a hook strip
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38/53 according to the present description can advantageously provide better peeling performance without causing damage to a loop material.
[073] Figure 12 is a photograph of a hook closure without slit as it is detached from a non-woven lace material. It is notable that the hardness of the comparative hook strip support affects the detachment angle of individual rows of hook elements. In contrast, figure 13 is a photograph of a hook strip according to the present description. The hook strip of figure 13 and the comparative hook strip have the same thickness of the support and the same configuration as the hooks, however the hook strip of figure 13 has 9 interrupted slits cut in the support between the rows of the hook elements. There were about two rows of hook elements between any two adjacent broken slits. The interrupted slits allow the detachment angle of individual rows of hook elements to increase, and the individual rows of hook elements are left to revolve to provide an increased percentage of loop bonds. It is also possible that the ability for the rows of hook elements between the revolving slots may allow the loops to slide down further over the rod of the hook elements. In any case, it is apparent from the photographs that there is much more interaction between the hook elements and the loop material in figure 13 than in figure 12. In some embodiments of the hook strip disclosed in the present invention, when the hook is connected with a loop material and then detached from the loop material at an angle of detachment from 135 to 180 degrees, an angle of detachment from an individual row of hook elements at a distance from an detachment front is greater (in some embodiments, at least 10, 20, 30, 40 or 50 degrees greater) than an angle of detachment from an individual row of hook elements on a comparative hook strip at the distance from the detachment front when the strip comparative hook is detached from a
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39/53 equivalent loop material, where the comparative hook strip is the same as the hook strip, except that the comparative hook strip has no cracks (for example, no interrupted cracks, partial cracks, incomplete cracks or complete cracks depending on the modality). The detachment angle refers to the angle between the rod of the hook element and the surface of the loop material. In some embodiments, the distance from the detachment front (ie, the point of separation between the hook strip and the loop material) is 1, 2, 3, 4 or 5 mm.
[074] Hook strips with smaller gauge brackets can flex more than the comparative hook strip shown in figure 12, and depending on the selection of the loop material, the difference in detachment performance in a laboratory in a test of 135 to 180 degree detachment between a hook strip according to the present description and a comparative hook strip with a thinner support (for example, up to 50, 80 or 90 micrometers) is not as pronounced. However, typically a user peeling off a hook strip according to the present description and a comparative hook strip that is not cracked may still notice a difference, regardless of the thickness of the support.
[075] The hook strip according to the present description is typically produced from a thermoplastic material. Thermoplastic materials suitable for the hook strip include polyolefin homopolymer such as polyethylene and polypropylene, copolymers of ethylene, propylene and / or butylene; copolymers containing ethylene such as ethylene - vinyl acetate and ethylene acrylic acid; polyesters such as poly (ethylene terephthalate), polyethylene butyrate and polyethylene naphthalate; polyamides such as poly (hexamethylene adipamide); polyurethanes; polycarbonates; poly (vinyl alcohol); ketones like polyether ether ketone; polyphenylene sulfide; and mixtures of these. typically, the hookstrap is produced from a polyolefin (e.g., polyethylene, polypropylene, polybutylene, ethylene copolymers, propylene copolymers, butylene copolymers and copolymers and mixtures of these materials).
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[076] In the hook strips disclosed in the present invention, the support and hook elements are typically integral (that is, formed at the same time as a unit, unitary). The hook elements in a support can be made, for example, by feeding a thermoplastic material over a mold surface that is constantly moving with cavities in the inverse shape of the hook elements. The thermoplastic material can pass between a choke formed by two cylinders or a choke between a die face and a cylinder surface, with at least one of the cylinders with the cavities. The cavities can be in the reverse shape of a hook element with a head that interconnects with the loop, or they can be in the reverse shape of a rod or a partially formed hook element (for example, a precursor to a hook element) . In the methods presented in the present invention, the term "hook element" is intended to include rods without heads. The pressure provided by the choke forces the resin into the cavities. In some embodiments, a vacuum can be used to evacuate the cavities for ease of extrusion into the cavities. The strangulation is typically wide enough so that a coherent support is formed over the cavities. The mold surface and the cavities can be optionally cooled by air or water before removing the integrally formed support and the vertical hook elements from the mold surface as by a peeling cylinder. If the hook elements formed at the exit of the cavities do not have heads that interconnect with loop, the heads that interconnect with loop could subsequently be formed into hooks by a capping method as described in US Patent No. 5,077,870 (Melbye et al.), the description of which is incorporated herein by reference in its entirety. Typically, the method of capping includes deforming the tip portions of the hook elements using heat and / or pressure. Heat and pressure, if both are used, could be applied in sequence or simultaneously.
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[077] Another useful method for forming hook elements on a support is the profile extrusion described, for example, in US Patent No. 4,894,060 (Nestegard), which is incorporated herein by reference in its entirety. Typically, in this method, a stream of thermoplastic flow passes through a patterned matrix bead (for example, cut by electrical discharge machining) to form a blanket with downward wave ridges, cutting the ridges and stretching the blanket to form separate projections. The ridges can form hook precursors and exhibit the cross-sectional shape of the hook elements (for example, with heads that interconnect with loops) to be formed. The ridges are sliced transversely at locations spaced along the length of the ridges to form distinct portions of the ridges with lengths in the direction of the ridges essentially corresponding to the length of the hook elements to be formed.
[078] Some hook strips that can be useful precursors to the hook strip according to the present description are available for sale, for example, from 3M Company, St. Paul, under the trade names “CS-600” or "CS-1010".
[079] For the hook strip according to the present description in any of its various modalities, the thickness of the support can be up to about 400, 250, 150, 100, 75 or 50 micrometers, depending on the desired application. In some embodiments, the thickness of the support is in a range of 30 to about 225 micrometers, from about 50 to about 200 micrometers, or from about 100 to about 150 micrometers. In some modalities, the hook elements have a maximum height (above the support) of up to 3 mm, 1.5 mm, 1 mm or 0.5 mm and, in some modalities, a minimum height of at least 0.05 mm , 0.1 mm or 0.2 mm. In some embodiments, the hook elements have an aspect ratio (i.e., a ratio of height to width at the widest point) of at least about 2: 1.3: 1 or 4: 1.
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[080] Cracks in the support (for example, interrupted cracks, partial cracks, cracks that form separate contiguous strips of the support and incomplete cracks) can be formed, for example, with the use of a rotating die cut of a continuous web that has elements support and hook formed by any of the methods described above. Interrupted cracks can be made, for example, by using rotating cutting blades with openings to form the closure regions. The height of the blade in the gaps can be adjusted to allow the closing regions to be partially cut or not cut, depending on the desired mode. Partial cracks can be made, for example, by adjusting the heights of the rotating die blades to make cracks of the desired depth. Other cutting methods (for example, laser cutting) can also be used. For cracks interrupted or not interrupted by the support, the cut can be made on any surface of the continuous mat, which corresponds to the first or second surface of the support. For partial cracks, cracks are made on the first surface of the support, which is the same surface from which the hook elements protrude. When hook elements are formed using the method described above, where a thermoplastic material is fed into a mold surface that continuously moves with cavities in the reverse shape of hook elements with heads that interconnect with loops, the slits can be made on the blanket before or after a capping step is performed to form heads that interconnect with loops. It should be understood that the cutting methods presented in the present invention in a continuous web can result in some examples with slits that are transverse over or cut through a row of hook elements. Although the rotating die, for example, can be positioned to form a gap between rows of hook elements, variability in the blanket process can cause the gap to pass through a row of hook elements and later return to its position intended.
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[081] For modalities of hook strips shown in the present invention with partial slits, partial slits can also be made with the use of protruding ridges in the cylinder formed with cavities with the inverse shape of the hook elements to be formed. Or the profile die profile used in the profile extrusion method can be made to form depressions in the support. In these embodiments, the cracks are formed simultaneously with the hook elements during the molding or extrusion processes.
[082] In modalities where there is molecular orientation induced by stretching in the support, the stretching can be performed in a blanket biaxially or monoaxially using techniques known in the art. For example, stretching can be performed on a flat film stretch apparatus, or monoaxial stretching can be performed by passing the continuous web laminate towards the machine over the increasing speed cylinders. The stretching can be carried out before or after the cracks are made in the support.
[083] Methods of preparing multiple hook strips in accordance with the present description include forming a continuous web that has a support and multiple rows of hook elements lined up in rows in one direction of the machine and projecting from a first surface of the machine. support using, for example, any of the methods described above; cut incomplete cracks (that is, broken cracks, partial cracks or a combination thereof) in the direction of the machine on the support between at least a few pairs of adjacent rows of the hook elements, with incomplete cracks not dividing the support; and cut complete slits in the machine direction through the support. The cutting of incomplete cracks and the cutting of complete cracks can be carried out in sequence or simultaneously. In some embodiments of the method presented in the present invention, the incomplete and complete slits are cut into the continuous web, simultaneously
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44/53 or in sequence, and the resulting multiple hook strips according to the present description are individually rolled (rolled flat) in cylinders. Hook strips can optionally be further attached to a conveyor, if desired, or otherwise converted.
[084] In some embodiments of the method presented in the present invention for forming strips with multiple hooks according to the present description, the full slits are cut into the continuous web first to provide multiple strips. The multiple strips are then joined to a conveyor (for example, a blanket from any of the conveyors described above). The laminated multiple strips can optionally be wound onto a coil before the partial depth cut is used to make incomplete slits (i.e., broken or partial slits) in the support without cutting the conveyor. In yet other embodiments of the method described herein, the full slits are first cut into the continuous web first to provide multiple strips, which can optionally be rolled into individual cylinders or otherwise stored. Subsequently, incomplete cracks can be cut into multiple strips, for example, just before attaching to a conveyor (for example, a blanket from any of the conveyors described above).
[085] For the laminate modalities presented in the present invention, with the slits extending in the first direction from the top edge to the bottom edge of the support to form contiguous strips separated from the support on the conveyor, the slits are typically formed by rotating or laser cutting after the support is attached to the conveyor.
[086] In any of the modalities where the second surface of the support is joined to a conveyor, the joining can be carried out using adhesives (for example, pressure sensitive adhesives). In modes where interrupted cracks are made in the support before the second support surface is joined
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45/53 to an adhesive, the viscosity of the pressure sensitive adhesive can be selected so that it does not pass through the cracks during the bonding process.
[087] In some embodiments where the conveyor is a fibrous mat, the joint comprises colliding the heated gaseous fluid (eg ambient air, dehumidified air, nitrogen, an inert gas or other gas mixture) on a first surface of the fibrous mat while it is moving; reaching heated fluid on the second surface of the support while the continuous mat is in motion, where the second surface is opposite the first surface of the support; and contacting the first surface of the fibrous mat with the second surface of the support such that the first surface of the fibrous mat is melted bonded (for example, bonded to the surface or bonded with a wrapping retaining bond) to the second support surface. colliding the heated gaseous fluid on the first surface of the fibrous mat and colliding the heated gaseous fluid on the second surface of the support, which can be executed in sequence or simultaneously.
[088] The fusion bonding (for example, surface bonding or bonding that retains wrap) with the use of heated gaseous fluid can be carried out, for example, by passing a fibrous blanket and the continuous blanket comprising the support and the elements of hook through a choke formed by two support cylinders. The fibrous blanket and the continuous blanket comprising the support and hook elements in general are fed into the choke from two different directions and come into contact with each other in the choke. Support cylinders can be arranged to operate the choke under very low pressure (for example, less than about 27 Newtons per linear cm (15 pounds per linear inch), less than about 18 Nlc (10 pli) or less than about 9 Nlc (5 pli)) compared to the pressures normally used in rolling materials (for which relatively high pressure is often preferred). In some embodiments, at least one of the support cylinders may comprise at least one layer of
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46/53 surface of a relatively soft material (for example, a rubber material with a hardness content less than 70 on the Shore A scale). This relatively smooth surface layer can be obtained, for example, through the use of a cylinder with a permanently attached soft surface coating, through the use of a removable sleeve of soft material or by coating the surface of the support cylinder. with a relatively soft resilient tape. If desired, the surface of one or both of the support cylinders can be scaled along the face of the cylinder in order to provide selectively laminating pressure at certain locations. The heated gaseous fluid can collide in the two blankets, for example, with the use of a nozzle that is placed close to the choke. The nozzle can be configured to have a first fluid release outlet and a second fluid delivery outlet that are in divergent relation (for example, the flow paths of the first and second release outlets differ by at least 25 degrees) to supply heated gas fluid to the two different blankets. The fluid can be heated by an external heater before being supplied to the nozzle through a supply line. In addition or instead, the heating elements can be provided inside the nozzle, or additional heating (for example, resistance heating or infrared heating) of the nozzle can be applied. In some embodiments, the impacted heated fluid is captured locally by means of at least one first fluid capture inlet that is locally positioned in relation to the first fluid distribution outlet, and at least one second fluid capture inlet that is locally located positioned in relation to the second fluid distribution outlet. Joining the continuous mat to a fibrous mat using this method can be advantageous, for example, to maintain the shape of the hook elements and without damaging any of the interrupted or partial cracks or closing regions when the continuous mat and the conveyor are joined.
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[089] Surface bonding or wrapping retaining bonding can advantageously be carried out over a large area or areas (referred to in this document as “area bonding”) as opposed to a small area bonding (often called point bonding) which is often achieved by ultrasound joining or other fusion bonding processes. The large number of fiber portions attached to the surface that can be randomly and / or uniformly present on the bonded area in such bond in the area can collectively provide adequate bonding intensity to the laminate to be handled and present satisfactory performance in various end uses. In some embodiments, area connections occupy at least about 100 mm square, at least about 400 square mm or at least 1000 mm square.
[090] Additional methods and apparatus for attaching a continuous blanket to a fibrous carrier blanket using heated gaseous fluid can be found in copending US Patent Applications with serial numbers 61 / 288,952 and 61 / 288,959, both filed on December 22 2009, and incorporated herein, as a reference in their entirety.
[091] In order for this description to be more fully understood, the following examples are presented. It should be understood that these examples are for illustrative purposes only, and should not be construed as limiting the description in any way.
Examples
Hook strips
[092] Control hook strips were prepared using the methods of the present invention described in US Patent Nos. 5,077,870 (Melbye et al.) And 6,132,660 (Kampfer). The polymer used to prepare the hook strips was an ethylene-propylene copolymer available from Dow Chemical Co., Midland, MI, under the trade name “C700-35N”. The base weight of the hook strips was
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191 grams per square meter (gsm) and the hook density was 248 cm ² (1600 hooks per inch ² ) arranged in a square matrix. The total caliber of the hook strips was 525 micrometers (pm) with a base film (support) caliber of 180 pm. The lid shape of the hook elements was oval (270 pm in the machine direction of the hook making process and 420 pm in the cross direction of the hook making process). Hook Strip Example 1 and Hook Strip Example 2 were prepared using the same hook material as the control hook strips. A plurality of interrupted slits have been made extending through the thickness of the hook strip holder at locations spaced in the machine direction of the hook making process using a rotary cutting blade. Hook Strip Example 1 had interrupted slits located between every two rows of hook elements. Hook Strip Example 2 had interrupted slits located between every four rows of hook elements. For both hook strips, the slits were 18 mm (0.71 inch) long and the slits were interrupted by intact closure regions that were 1 mm (0.04 inch) long. The closure regions were misaligned in a direction perpendicular to the direction of the interrupted slits as shown in figure 6. The other dimensions and characteristics of Hook Strips Examples 1 and 2 (for example, base weight, hook density, total gauge, gauge of the support, cover shape and dimensions, etc.) were the same as those of the control hook strip.
180 Degree Detachment Rating
[093] The 180 Degree Detachment Assessment was used to examine the detachment characteristics when removing control hook strips and Hook Strips Example 1 and 2 from various loop closure materials.
[094] The hook closure tabs have been prepared for the detachment assessment by removing the hook material from the non-woven carrier from the attachment tabs on size 4 “PAMPERS BABY DRY” (Procter &
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Gamble Company). This was done by cooling the flaps by exposing them to liquid nitrogen and detaching the existing hook piece from the nonwoven conveyor while cold, and when the nonwoven conveyor was warmed up to room temperature, pieces of the control hook strips and Examples of Hook Strips 1 and 2 (13 mm x 25.4 mm in size) were then placed on the diaper holding flap non-woven conveyor using two layers of double-coated adhesive tape obtained from from 3M Company, St. Paul, MN, under the trade name “SCOTCH ADHESIVE TRANFER TAPE NO. 924 ”, leaving enough adhesive exposed (about 6 mm) to allow the hook closure flap to be attached to a guide paper for detachment assessment (this is the existing exposed adhesive on the nonwoven closure flap).
[095] The loop samples used for detachment evaluation were obtained by removing the commercially available baby diaper closure straps. Loop A (interlaced loop) was obtained from size 4 diapers available from Procter & Gamble Company under the trade name “PAMPERS BABY DRY”. Loop B (extrusion-linked loop, as described in US Patent No. 5,256,231 (Gorman et al.) Was obtained from New Baby size 1 diapers available from Procter & Gamble Company under the trade name “PAMPERS SWADDLERS” Loop C (non-woven loop) was obtained from baby diapers size 4 available from (Procter & Gamble Company) under the trade name “LUVS”.
[096] Detachment assessments were performed at constant temperature and humidity (23 ° C and 51% relative humidity). The loop material used for testing was firmly placed on a 5.08 cm x 12.7 cm (2 inch x 5 inch) steel panel using double-coated adhesive tape. The hook closure flap prepared as described above was attached to a 2.54 cm x 20.3 cm (1 inch x 8 inch) guide paper using the adhesive exposed on the closure flap
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50/53 hook. Hooks were placed at each end of the loop material (decrease at each end). This was done due to the directionality of the loop material, and the other loop materials were tested in the same way. The samples were hand rolled with a 2 kg (4.5 lb) rubber cylinder twice (four passes, top to bottom). The loop panel was placed in the lower jaw of a tensile tester with constant rate of extension “INSTRON” and the end of the guide paper attached to the hook fastener was placed in the upper jaw (20.3 cm (8 inch) gap )). At a traction speed of 30.5 cm (12 inches) per minute, the detachment was recorded, maintaining the detachment angle at 180 degrees, until the hook strip was disengaged from the loop material. The results are reported in Tables 1 to 3. The upper jaw moved until the flap of the hook was completely disengaged from the loop.
[097] Table 1 summarizes the 180-degree detachment data obtained when evaluating the hook strips using Loop A (interlaced loop). Figure 8 illustrates the detachment curve for the C2 Control Example Specimen. Similar detachment curves (not shown) were obtained for Control Example Specimens C1 and C3. The load under low extension is low (first half of the curve) and then increases towards the end of the hook section (second half of the detachment curve). It was observed that these detachment curves were typical of detachment curves for the control hook strips being removed from an interlaced loop material. Figure 9 illustrates the detachment curve for Specimen 2 of the Hook Strip Example 1, a hook strip that has interrupted slits cut in the support between each two rows of hook elements. Similar detachment curves (not shown) were obtained for Specimens 1 and 3. The detachment force was more consistent with the detachment curve and was at a higher level of strength compared to the detachment curve shown in figure 8. It was observed that these curves of
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51/53 detachment were typical of detachment curves for hook strips according to the present description being removed from an interlaced loop material. In the following tables, The Energy Delta describes the area under the detachment curve.
OK beautiful 1 Sample Hook Strip Delta of Energy milijoule (mJ) Maximum gram-force load (N (gf)) Average Load(N (gf)) Average Peak(N (gf)) C1 Control 27.5 3.31 (337.9) 0.76 (77.7) 1.66 (169.7) C2 Control 39.6 4.41 (450.1) 1.04 (106.1) 1.69 (172.9) C3 Control 27.5 3.89 (396.9) 0.86 (87.4) 1.28 (130.2) 1 Ex. 1 108.6 6.92 (706.0) 3.19 (325.2) 4.45 (454.1) 2 Ex. 1 125.6 9.05 (922.9) 3.38 (344.6) 4.60 (469.5) 3 Ex. 1 148.2 9.92 (1011.6) 4.09 (416.9) 5.59 (570.3)
[098] Table 2 summarizes the 180 degree detachment data obtained when evaluating the hook strips using Loop B (loop connected by extrusion). Figure 10 illustrates the detachment curve for the C5 Control Example Specimen. Similar detachment curves (not shown) were obtained for Control Example Specimens C4 and C6. The results were similar to those obtained when evaluating the control hook strip with the interlaced loop material as described above. The load under low extension is low (first half of the curve) and then increases towards the end of the hook section (second half of the detachment curve). It was observed that these detachment curves were typical of detachment curves for the control hook strips being removed from an extruded bonded loop material. Figure 11 illustrates the detachment curve for Specimen 4 of the Hook Strip Example 1. Similar detachment curves (not shown) were obtained for Specimens 5 and 6. The results obtained were similar to those obtained to evaluate the Example of Strip Hook 1 with the loop material as described above. The detachment force was more consistent across the detachment curve and was at a greater
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52/53 strength level compared to the detachment curve shown in figure 10. It was observed that these detachment curves were typical of detachment curves for hook strips according to the present description being removed from an extrusion loop material . Hook Strip Example 2, a hook strip that has interrupted slits cut in the holder between every four rows of hook elements, was used for Specimens 7-9. Figure 11A illustrates the detachment curve for Specimen 9. Similar detachment curves (not shown) were obtained for Specimens 7 and 8. Although differences between these examples and the control hook strips are not readily apparent from the tabulated data, it is evident from the comparison of the detachment curve shapes of figure 10 and figure 11A that the force required to remove the Hook Strip Example 2 from the extruded bonded loop was more uniform over the length of the detachment than for the strip of detachment control hook, which suggests greater reliability of the closing components, even when using hook strips with more than one or two rows of hook elements between the interrupted slits.
OK beautiful 2 Sample Hook Strip Delta Power(mJ) Maximum load(N (gf)) Average Load(N (gf)) Average Peak(N (gf)) C4 Control 132.6 6.95 (709.1) 3.69 (376.4) 4.21 (429.5 C5 Control 127.9 11.54 (1176.6) 3.66 (373.3) 5.41 (551.8) C6 Control 322.4 18.79 (1916.0) 8.51 (868.1) 13.59 (1386.7) 4 Ex. 1 322.6 18.85 (1922.2) 9.25 (943.0) 11.68 (1190.9) 5 Ex. 1 300.3 18.32 (1868.1) 7.88 (803.9) 11.14 (1136.4) 6 Ex. 1 359.2 19.78 (2017.3) 9.62 (981.1) 14.25 (1453.1) 7 Ex. 2 103.5 6.86 (699.3) 2.72 (277.0) 4.05 (412.8) 8 Ex. 2 194.1 15.27 (1556.8) 5.09 (519.6) 10.57 (1077.9) 9 Ex. 2 152.2 12.11 (1235.2) 4.41 (449.5) 7.07 (720.6)
[099] Table 3 summarizes the 180 degree detachment data obtained when evaluating the hook strips using Loop C (non-woven bonded loop). The results obtained for the Control Sample Specimens C7-C9 were
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53/53 similar to those obtained when evaluating the control hook strips with the interlaced loop and the extrusion-linked loop materials as described above. The load under low extension is low (first half of the curve) and then increases towards the end of the hook section (second half of the detachment curve). The results obtained for the Specimens of the invention 10-12 of the hook strip 1 were those obtained for Specimens 1-6 with the materials of the interlaced loop and the extruded loop materials as described above. The detachment force was more consistent across the detachment curve and was at a higher force level compared to the detachment curves for the control hook strips.
Table 3
Sample Hook Strip Delta Power(mJ) Maximum load(N (gf)) Average Load(N (gf)) Average Peak(N (gf)) C7 Control 31.6 3.06 (312.0) 0.85 (86.3) 1.15 (117.3) C8 Control 36.0 2.74 (279.0) 1.02 (104.0) 1.42 (145.3) C9 Control 31.6 3.49 (355.6) 0.89 (91.5) 0.93 (94.5) 10 Ex. 1 61.0 3.42 (348.6) 1.60 (163.4) 2.09 (213.0) 11 Ex. 1 84.4 5.25 (535.3) 2.22 (226.1) 3.37 (343.5) 12 Ex. 1 77.0 4.71 (479.9) 2.26 (230.9) 2.71 (276.2)
[100] This description can employ several modifications and alterations without departing from the spirit and scope of the invention. Consequently, this description is not limited to the modalities described above, but is intended to be controlled by the limitations set out in the following claims, as well as any equivalents thereof. This description can be properly practiced in the absence of any element not specifically presented in this document. All patents and patent applications cited above are hereby incorporated by reference in their entirety.

权利要求:
Claims (13)
[1]
1. Hook strip (10) CHARACTERIZED by the fact that it comprises:
a support (14) having a first surface and a length in one direction of the machine (L);
multiple rows (16) of hook elements (12) aligned in the machine direction (L) and protruding from the first surface of the support (14); and an interrupted slot (20a) cut through the support (14) between at least a pair of adjacent rows (16) of the hook elements (12), in which the interrupted slot (20a) extends towards the machine (L) and is interrupted by at least one intact closing region (22) of the support (14), in which at least one of the following limitations is met:
where there is a partial depth cut (24) in at least one intact closure region (22), where the partial depth cut (24) is collinear with the interrupted slot (20a), but does not extend through the support (14); or in which the interrupted slits (20a) are cut through the support (14) between at least three pairs of adjacent rows (16) of the hook elements (12), and in which the number of rows (16) of hook elements (12) between at least some of the broken cracks (20a) varies.
[2]
2. Hook strip (10), according to claim 1, CHARACTERIZED by the fact that the hook strip (10) comprises a partial depth cut (24) in at least one closing region (22) intact, in that the partial depth cut (24) is collinear with the interrupted slot (20a), but that it does not extend through the support (14).
[3]
3. Hook strip (10) according to claim 1 or 2, CHARACTERIZED by the fact that the hook strip (10) comprises the interrupted slits (20a) cut through the support (14) between at least three pairs of adjacent rows (16) of the hook elements (12), and in which the number of rows (16) of hook elements (12) between at least some of the broken slits (20a) varies.
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[4]
Hook strip (10) according to any one of claims 1 to 3, CHARACTERIZED by the fact that there are interrupted slits (20a) cut through the support (14) between at least two pairs of adjacent rows (16) of the hook elements (12), in which for any two interrupted slits (20a) in an adjacent position, the closing regions (22) are misaligned in a transverse direction (W) perpendicular to the machine direction or first direction (L).
[5]
5. Hook strip (10) according to any one of claims 1 to 4, CHARACTERIZED by the fact that the hook elements (12) have projections that interconnect with the loop, and in which at least a portion of each protrusion that interconnects with the loop extends at an angle other than zero to the partial gap (20a).
[6]
6. Hook strip (10) CHARACTERIZED by the fact that it comprises:
a support (14) having a first surface, thickness and length in a first direction;
multiple rows (16) of hook elements (12) aligned in the first direction and projecting from the first surface of the support (14); and a partial slot cut (20b) on the first surface of the support (14) between at least a pair of adjacent rows (16) of the hook elements (12), wherein the partial slot (20b) extends in the first direction and penetrates the thickness of the support (14) in a range of 40 to 90 percent.
[7]
7. Hook strip (10), according to claim 6, CHARACTERIZED by the fact that the hook elements (12) have projections that interconnect with the loop, and in which at least a portion of each projection that interconnects with the loop extends at an angle other than zero to the partial slot (20b).
[8]
8. Hook strip (10) according to claim 6 or 7, CHARACTERIZED by the fact that the partial crack (20b) is interrupted by at least one closing region (22) of the support (14) that is not cracked .
[9]
9. Hook strip (10) according to any of claims 6 to 8, CHARACTERIZED by the fact that there are partial slits (20b) cut in the first
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3/3 support surface (14) between at least three pairs of adjacent rows (16) of the hook elements (12), and where the number of rows (16) of the hook elements (12) between at least some of the partial slits (20b) varies.
[10]
10. Hook strip (10) according to any one of claims 1 to 9, CHARACTERIZED by the fact that the support is not attached to a conveyor.
[11]
11. Fixing laminate (40) CHARACTERIZED by the fact that it comprises a conveyor (45) and the hook strip (10), as defined in any one of claims 1 to 9, wherein the support (54) has a second surface opposite the first surface, and the second surface of the support (54) is joined to a portion of the conveyor (45).
[12]
12. Method for producing multiple hook strips, as defined in any one of claims 1 to 9, CHARACTERIZED by the fact that the method comprises:
forming a continuous blanket having a support (14) and multiple rows (16) of hook elements (12) aligned in rows in one direction of the machine (L) and projecting from a first surface of the support (14);
cut interrupted slits (20a) in the machine direction (L) on the support (14) between at least a few pairs of adjacent rows (16) of the hook elements (12), in which the interrupted slits (20a) do not divide the support ( 14); and cutting complete slits in the machine direction (L) through the support (14), where the complete slits divide the support (14);
wherein each of the strips with multiple hook strips (10) has at least one broken slot (20a) cut in the support (14) in the machine direction (L).
[13]
13. Method, according to claim 12, CHARACTERIZED by the fact that the continuous mat is not attached to a conveyor mat.

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同族专利:

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公开号 | 公开日

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CN102946753B|2015-07-29|

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JP2013533770A|2013-08-29|

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DK2582262T3|2017-08-14|

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MX336799B|2016-02-02|

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TWI562739B|2016-12-21|

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US20130095281A1|2013-04-18|

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JP6128559B2|2017-05-17|

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TW201204286A|2012-02-01|

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WO2011163101A2|2011-12-29|

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US20150164713A1|2015-06-18|

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BR112012032969A2|2016-11-22|

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JP6448702B2|2019-01-09|

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JP2017159051A|2017-09-14|

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EP2582262A2|2013-04-24|

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US10322560B2|2019-06-18|

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US20110313389A1|2011-12-22|

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US9138957B2|2015-09-22|

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WO2011163101A3|2012-05-03|

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CN102946753A|2013-02-27|

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MX2013000096A|2013-02-27|

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EP2582262B1|2017-05-17|

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ES2634209T3|2017-09-27|

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EP2582262A4|2014-04-09|

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US8961850B2|2015-02-24|

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法律状态:
2018-12-26| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|

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2019-08-06| B06U| Preliminary requirement: requests with searches performed by other patent offices: suspension of the patent application procedure|

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2020-03-31| B09A| Decision: intention to grant|

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2020-06-09| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 20/06/2011, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

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申请号 | 申请日 | 专利标题

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US12/819,808|US9138957B2|2010-06-21|2010-06-21|Slit hook strips and laminates and articles containing the same|

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PCT/US2011/041019|WO2011163101A2|2010-06-21|2011-06-20|Slit hook strips and laminates and articles containing the same|

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