巴西专利BR102018069950A2 Extensible Dressings

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专利摘要:
The present invention relates to dressings such as bandages with improved extensibility. The present invention further relates to dressings comprising an absorbent body and a backing layer having improved extensibility.
公开号:BR102018069950A2
申请号:R102018069950-4
申请日:2018-09-28
公开日:2019-04-16
发明作者:Melinda Cettina；Paulo G. Oriani；Fabio Eduardo F. Rangel
申请人:Johnson & Johnson Consumer Inc.；
IPC主号:

专利说明:

[001] The present invention refers to dressings as bandages with improved extensibility. The present invention also relates to dressings that comprise an absorbent body and a support layer having improved extensibility.
BACKGROUND OF THE INVENTION [002] Dressings such as bandages for application and / or skin coverage have been known for some time. Such dressings have gained wide acceptance to close minor wounds, protect minor wounds and / or cover abrasions. In some cases, microporous or breathable bandages have been developed and are used to cover minor injuries (including injuries that have been partially healed).
[003] Although such dressings have been significantly improved over the years by the fact that, for example, they have incorporated microporous materials that allow the wound to breathe and allow water vapor to escape from the wound, thereby reducing the chances of maceration of the wound, there remains a need for dressings that improve extensibility. Consequently, the wound dressing set of the present invention provides such improved extensibility, comprising an absorbent body and a support layer fixed to the absorbent body by discrete regions of adhesive positioning and / or the absorbent body having a smaller elastic modulus or equal to the elastic modulus of the support layer. In certain embodiments, the wound dressing assembly additionally comprises a wound contact layer.
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2/34 [004] It is, therefore, an aspect of the present invention to provide wound dressing sets that can be used to cover, protect wounds and facilitate wound healing. It is also an aspect of the present invention to provide a wound dressing kit comprising an absorbent body and a support layer having improved extensibility. It is a further aspect of the present invention to provide a wound dressing assembly comprising an absorbent body and a support layer attached to the absorbent body by a discrete directional region (s) of positioning adhesive. It is yet another aspect of the present invention to provide a wound dressing set comprising an absorbent body and a support layer, the absorbent body having an elastic modulus less than or equal to the elastic modulus of the support layer. Other aspects of the present invention will be apparent from the description and the subsequent claims.
SUMMARY OF THE INVENTION [005] In one embodiment, the present invention relates to a wound dressing set comprising:
The. an extensible absorbent body having a longitudinally extending center line, a transversely extending center line and a periphery, the absorbent body having a first surface and a second surface, the second surface being opposite the first surface;
B. a positioning adhesive in contact with at least a portion of the second surface of the absorbent body;
ç. an extensible support layer adhered to the second surface of the absorbent body by the positioning adhesive so that the directional extension of the support layer causes a corresponding directional extension of the second surface of the absorbent body; and
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d. a wound contact layer that is less extensible than the absorbent body, the wound contact layer being arranged on the first surface of the absorbent body, so that the second surface of the absorbent body extends over the corresponding extension of the support layer.
[006] In another embodiment, the present invention relates to a wound dressing comprising:
The. an extensible absorbent body having a longitudinally extending center line, a transversely extending center line and a periphery, the absorbent body having a first surface, a second surface and an elastic module, the second surface being opposite the first surface ;
B. a positioning adhesive in contact with at least a portion of the second surface of the absorbent body;
ç. a support layer having an elastic module, the support layer adhered to the second surface of the absorbent body through the positioning adhesive [007] with the elastic module of the absorbent body being equal to or less than the elastic module of the support layer.
[008] In another embodiment, the present invention relates to a wound dressing set comprising:
The. an absorbent body having a longitudinally extending center line, a transversely extending center line and a periphery, the absorbent body having a first surface and a second surface, the second surface being opposite the first surface, the second surface having;
B. an adhesive in contact with the second surface of the absorbent body so as to form a region of the positioning adhesive in the center of the second surface of the absorbent body, the region of the positioning adhesive having a periphery;
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ç. a support layer adhered to the second surface of the absorbent body by the positioning adhesive region, the support layer having an internal area at least partially surrounded by an external area, so that the periphery of the positioning adhesive region defines an internal contour of a surface area of the support layer, so that the surface area of the support layer that extends from the periphery of the positioning adhesive region in a direction opposite to the periphery of the positioning adhesive region, in addition to at least a portion of the periphery of the absorbent body 1 to the outer region of the backing layer, such a surface area being free of, or substantially free of, adhesive.
[009] In yet another embodiment, the present invention relates to a wound dressing set comprising:
The. an absorbent body having a longitudinally extending center line, a transversely extending center line and a periphery, the absorbent body having a first surface and a second surface, the second surface being opposite the first surface, the second surface having:
B. an adhesive in contact with the second surface of the absorbent body to form a region of the positioning adhesive that extends substantially along the central line that extends transversely,
ç. a support layer adhered to the second surface of the absorbent body by the region of the positioning adhesive, the support layer having an internal zone at least partially surrounded by an external zone.
[0010] the positioning adhesive region having a first side and a second side, opposite the first side, so that
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5/34 when the positioning adhesive region comes into contact with the support layer:
i. the first side defines an end of a first surface area of the support layer extending from the first side, in addition to the periphery of the absorbent body, to the outer zone of the support layer in the direction of the longitudinally extending center line; and ii. the second side defines an end of a second surface area of the support layer that extends from the second side, in addition to the periphery of the absorbent body, to the outer zone of the support layer towards the longitudinally extending center line and opposite the direction of the first surface area, the first and second surface areas being substantially free of adhesive.
BRIEF DESCRIPTION OF THE DRAWINGS [0011] An embodiment of this invention will now be described in greater detail, by way of illustration only, with reference to the accompanying drawings, in which [0012] Figure 1 is a perspective view of an embodiment of a set of wound dressing 10.
[0013] Figure 2 is a top plan view of the modality of the wound dressing set 10 shown in Figure 1.
[0014] Figure 3 is a side view of the modality of the wound dressing set 10 shown in Figure 1.
[0015] Figure 4 is a top plan view of another embodiment of the wound dressing set 10 of the present invention, showing the position of the positioning adhesive C region through the absorbent body 1.
[0016] Figure 5 is a side view of the modality of the wound dressing set 10 shown in Figure 4, showing the
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6/34 region of positioning adhesive C in contact with the second surface 3 of the absorbent body 1 and the support layer 5.
[0017] Figure 6 is a top plan view of another embodiment of the wound dressing set 10 of the present invention, showing the region of the positioning adhesive C in a distinct centralized region on the second surface 3 through the absorbent body 1 .
[0018] Figure 7 is a side view of the modality of the wound dressing set 10 shown in Figures 1 to 3 applied to the skin 12 and showing the layer in contact with the wound 6, the absorbent body 1, the positioning adhesive 4 and the support layer 5 before stretching the support layer 5.
[0019] Figure 8 is a side view of the modality of the wound dressing set 10 shown in Figures 1 to 3 applied to the skin 12 and showing the layer in contact with the wound 6, the absorbent body 1, the positioning adhesive 4 and the support layer 5 after stretching the support layer 5.
[0020] Figure 8A is an enlargement of Figure 8A circled in Figure 8 showing the stretching of the second surface 3 of the absorbent body 1 by stretching the support layer 5 despite the restricted movement of the first surface 2 of the absorbent body 1 due to its adhesion to the layer in contact with the less extensible wound 6.
[0021] Figure 9 is a side view of the modality of the wound dressing set 10 shown in Figures 4 and 5 applied to the skin 12 and showing the absorbent body 1, the positioning adhesive region C and the support layer 5 before stretching of the backing layer 5.
[0022] Figure 10 is a side view of the modality of the wound dressing set 10 shown in Figures 4 and 5 applied to the
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7/34 skin 12 and showing the absorbent body 1, the region of the positioning adhesive C and the support layer 5 after stretching the support layer 5.
[0023] Figure 10A is an enlargement of Figure 10A circled in Figure 10 showing that any stretching of the backing layer 5 has minimal effect on the absorbent body 1 due to the reduced contact between the absorbent body 1 and the positioning adhesive region Ç.
[0024] Figure 11 is an exploded view of an embodiment of the wound dressing set 10 of the present invention showing the absorbent body 1, the positioning adhesive 4, the support layer 5 and, optionally, the layer in contact with the wound. 6 and the removable strip 7.
DETAILED DESCRIPTION OF THE INVENTION [0025] The dressings of the present invention may comprise, consist of or consist essentially of the essential elements and limitations of the invention described herein, as well as any of the additional or optional features, components or limitations described herein.
[0026] As used in the present invention, the term comprising (and its grammatical variations) is used in the inclusive sense of (and interchangeably with the terms) having or including and not in the exclusive sense of consisting only of. For use in the present invention, the terms one, one, o and a are understood to encompass both the plural and the singular.
[0027] For use in the present invention, the terms skin and tissue are interchangeable and refer to the skin of mammals.
[0028] All documents incorporated herein, by way of reference, in part or in whole, are only incorporated here to the extent that they are not inconsistent with this specification.
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8/34 [0029] In certain embodiments, the present invention, as disclosed herein, can be practiced in the absence of any component, element (or group of components or elements) or method step that is not specifically disclosed in this document. DRESSING SET
ABSORBENT BODY [0030] In certain embodiments, the dressing set 10 of the present invention comprises an absorbent body 1 having an elastic modulus (calculated as indicated below). As shown in Figures 1 and 3, the absorbent body 1 has a central line that extends longitudinally l and a central line that extends transversely in t, the absorbent body 1 having a first longitudinal edge 14, a second longitudinal edge 15, a first transverse edge 16 and a second transverse edge 17, each, individually or collectively, defining a periphery p. The absorbent body 1 also has a first surface 2 which is a wound-facing surface and a second surface 3 (the second surface 3 located opposite the first surface 2).
[0031] In certain modalities, the absorbent body 1 comprises any material that is conformable, non-irritating to the user's skin and capable of absorbing and retaining liquids. The absorbent body 1 can be, or be in the form of a single layer or multilayer material, and if it is a multilayer material, each layer can be made of the same or different materials.
[0032] Examples of materials that would be suitable for the absorbent body 1 include or comprise crimped cellulose filler; melt blowing polymers; chemically stiffened, modified or cross-linked cellulosic fibers; fabric; absorbent foams; absorbent sponges; superabsorbent polymers; absorbent gelling materials; or any other absorbent material
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9/34 known or combinations of such materials. In certain embodiments, the absorbent body 1 may be a blanket produced by electrospinning; a nonwoven (i.e., a natural or synthetic nonwoven including fibrous and non-fibrous nonwovens); a fabric; a film (for example, a formed film); a whisk; by continuous wiring; by hydroentanglement; hydroentangled; carded; perforated by needle; wet or any other suitable material. A more detailed description of the materials useful in forming the absorbent body 1 can be found in US patent 9445951B2 and in US patent publication 20140308867A1, each of the patent documents being incorporated herein by reference in its entirety. The absorbent body 1 can further comprise smaller amounts (typically less than 10%) of non-liquid absorbent materials, such as adhesives, waxes, oils, antimicrobials, active ointments and the like. [0033] In one embodiment, the absorbent body 1 is or comprises a foam material, and optionally an open cell foam. The foam may include a synthetic polymer that is adapted to form a conformable open cell foam that absorbs wound exudate. Examples of materials suitable for foams include synthetic organic polymers including (or selected from), but not limited to: Polymeric foams can be produced from, or comprise, a polymer comprising one or more types of monomers (for example, copolymers ) or mixtures (eg blends) of polymers. Examples of foam materials are described in the book entitled Flexible Polyurethane Foams, Dow Polyurethanes, by R. Herrington and K. Hock, 1997.
[0034] Foams can have a wide range of thicknesses; from about 0.5 mm or 1 mm to about 3 mm or 10 mm thick. In addition, they can include one or more layers adapted to
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10/34 have the desired properties. These layers can be directly bonded to each other or bonded to each other with adhesive layers. Optionally, one or more layers of polymeric or non-woven mesh, woven or interlaced blankets can be arranged between these layers to enhance the physical integrity of the foam.
[0035] In another embodiment, the absorbent body 1 comprises particles or superabsorbent fibers contained within a porous pouch. Examples include fibrous superabsorbent blankets that are available from National Nonwovens, Cincinnati, Ohio, USA, or sachets containing superabsorbent material, such as the Sorbion S sachet, available from Sorbion AG, Senden, Germany. Superabsorbent particles are also available as the AQUA KEEP superabsorbent powder available from Sumitomo Seika Chemicals Co., Ltd. (Osaka, Japan) and the HySorb® superabsorbent available from BASF Corporation (Portsmouth, Va, USA).
[0036] An example of a suitable absorbent body 1 is found in the Delstar's (Del.) PET non-woven block. Other examples include Delstar's polyolefin nonwovens and blends of rayon and polyester or rayon and polyolefin. Suitable constructions for the absorbent body are disclosed in U.S. Patent Nos. 6,838,589; 7,030,288; and 7,612,248, the descriptions of which are incorporated herein by way of reference.
[0037] In other embodiments, the absorbent body 1 comprises hydrocolloids.
[0038] The hydrocolloid element used can be any substance that performs well for this use, for example sodium carboxy methyl cellulose, pectin, xanthan gum, polysaccharides, sodium or calcium alginates, chitosan, kelp extract (carrageenan) , acid
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11/34 polyaspartic, polyglutamic acid, hyaluronic acid or salts and derivatives of these substances, among others.
[0039] Hydrocolloids, such as sodium carboxy methyl cellulose and pectin, among others, are agents that form gels as soon as they come into contact with the body fluids from the wound. When used in adhesive bandages, these hydrocolloids can be combined with elastomers and / or adhesives. In certain embodiments, the absorbent body 1 comprising such hydrocolloids must provide a moist (but unsaturated) environment, the environment being an appropriate situation to facilitate healing.
POSITIONING ADHESIVE [0040] The second surface 3 of the absorbent body 1 is attached to a support layer 5 by means of a positioning adhesive 4.
[0041] Positioning adhesive 4 is typically a pressure sensitive positioning adhesive, and in some embodiments, it can be a pressure sensitive adhesive used for application to the skin (ie, causing minimal or no adverse effects on the skin and being easily removed from the skin with minimal or no discomfort). Consequently, in certain embodiments, the positioning adhesive 4 may be the same as the skin contact adhesive 8 (described below, including specific examples of adhesives useful for skin contact). Other useful positioning adhesives are described in U.S. Patent No. RE 24,906; in U.S. Patent No. 4,737,410.31 (Example 31); and in US Patent Nos. 3,389,827, 4,1 12,213, 4,310,509 and 4,323,557, each of such patents being incorporated herein by reference.
[0042] In certain embodiments, positioning adhesive 4 is disposed on or comes into contact with the second surface 3
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12/34 of the absorbent body 1 so as to form a continuous or discontinuous layer or surface area of positioning adhesive 4. [0043] In one embodiment, as shown in Figure 6, positioning adhesive 4 is disposed on or comes into contact with contact with the second surface 3 of the absorbent body 1 to form a region C of the positioning adhesive 4 in or near the center of the second surface 3 of the absorbent body 1 (i.e., where the central line extending longitudinally along the line centrally extending transversely t intersect), region C of positioning adhesive 4 having a periphery c.
[0044] In another embodiment, as shown in Figures 4 and 5, the positioning adhesive 4 is disposed on or comes in contact with the second surface 3 of the absorbent body 1, in the center of the second surface 3 of the absorbent body 1 where a line longitudinally extending central line l and a transversely extending central line t intersect to form a region C of the positioning adhesive 4, whose region C can still extend substantially directionally along the transverse t central line, the region C of the positioning adhesive 4 forming a first side C 'and a second side C, opposite the first side C'.
[0045] The phrase substantially along in relation to the positioning adhesive region C in relation to the central line extending transversely t means that the positioning adhesive region can be of any pattern or directional shape, including being aligned with, diagonally a, or intersecting (as in the case of a sinusoidal intersection pattern) the transversely extending centerline t, provided that the positioning adhesive region extends in the general direction of the indicated centerline. Additionally, a first side
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C 'and a second side C can have any linear pattern, and have the same pattern (s) or different pattern (s).
SUPPORT LAYER [0046] The dressing set 10 additionally comprises a support layer 5 having a front surface 5 'and a back surface 5 (the rear surface 5 located opposite the front surface 5'), the support layer 5 having a outer zone 13, inner zone 11 and periphery P, inner zone 11 either partially (as in Figure
4) or completely (as in Figure 6) surrounded by the outer zone 13. The front surface 5 'of the support layer 5 is adhered to the second surface 3 of the absorbent body 1 through the positioning adhesive 4 (or region C of the positioning adhesive 4) and, in certain embodiments, so that the absorbent body 1 is positioned within the inner area 11. In certain embodiments, the front surface 5 'of the support layer 5 is adhered to the second surface 3 of the absorbent body 1 by the adhesive of positioning 4 so that the directional extension of the support layer 5 causes a corresponding directional extension of the second surface 3 of the absorbent body 1. The support layer 5 can comprise a single layer or multiple layers (or support layers).
[0047] In certain embodiments, the edge of the periphery P of the support layer 5 extends beyond the edges of at least a portion of the periphery p of the absorbent body 1 so that the support layer 5, at least partially, covers and, at least partially, it extends beyond the absorbent layer 1 to adhere to a user's skin. In certain embodiments, the edge of the entire periphery P of the support layer 5 extends beyond the entire edge of the periphery p of the absorbent body 1 - so that the support layer 5 covers completely and extends completely beyond the absorbent body 1 to adhere to a user's skin.
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14/34 [0048] In certain embodiments, the positioning adhesive 4 contacts the front surface 5 'of the support layer 5 to adhere the front surface 5' of the support layer 5 to the second surface 3 of the absorbent body 1.
[0049] In certain embodiments, region C of positioning adhesive 4 comes into contact with both of them i) the second surface 3 of the absorbent body 1 in, or close to, its center (that is, where a longitudinally extending central line l and a central line extending transversely t intersect) and ii) the front surface 5 'of the backing layer 5 so that the front surface 5' of the backing layer 5 adheres to the second surface 3 of the absorbent body 1 and forms a periphery of c defining an internal contour of a surface area of the support layer 5, such surface area of the support layer 5 extending from the periphery c in a direction opposite to that of the periphery c, in addition to at least a portion of the periphery p of the absorbent body 1 to the outer zone 13 of the backing layer 5 as shown in Figure 6. Such surface area of the backing layer 5 is free of or substantially free of adhesive.
[0050] In one embodiment, as shown in Figures 4 and 5, region C of positioning adhesive 4, as described above, still extends directionally substantially along the central line that extends transversely t, the region C that comes in contact with the front surface 5 'of the backing layer 5 to adhere to the front surface 5' of the backing layer 5 to the second surface 3 of the absorbent body 1 so that:
i) the first side C 'defines an end of a first surface area of the support layer extending from the first side C', in addition to at least a portion of the periphery p of the absorbent body 1, to the outer zone 13 support layer 5 in the direction
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15/34 of the central line extending longitudinally l, the first surface area bounded by the outer zone 13; and ii) the second side C defines an end of a second surface area of the support layer extending from the second side, beyond the periphery of the absorbent body, to the outer zone 13 of the support layer 5 in the direction of the line centrally extending longitudinally and opposite the direction of the first surface area, the second surface area bounded by the outer zone 13, the first and second surface areas being substantially free of adhesive.
[0051] As described in the present invention in relation to the surface areas of the backing layer 5 that are substantially adhesive-free, the term substantially adhesive-free means that there is less than 20%, optionally, less than 15%, optionally, less than 5%, optionally, less than 2.5% or optionally zero percent of the surface area contacts described, or any adhesive or compound having adhesive properties has arranged thereon.
[0052] Without sticking to theory, as shown in Figures 9 to 10A, it is believed that the placement of the positioning adhesive as a region of the positioning adhesive centrally (for example, in the center of) or that it extends substantially along of the center line extending transversely t, in relation to the second surface 3 of the absorbent body 1, as explained above, minimizes any movement or stretching of the absorbent body 1 due to the movement or stretching of the fixed support layer 5.
[0053] In certain embodiments, the elastic modulus of the absorbent body 1 is equal to or less than the elastic modulus of the support layer 5, or the load / force necessary to extend the absorbent body 1 to a given percentage of change in length
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16/34 that is equal to or less than the load / force required to extend the support layer to the same percentage of change in length. The elastic modulus (for example, of the absorbent body 1 and / or the backing layer 5), for use in the present invention, is calculated as follows, by obtaining stretch measurements according to a modified version of the ASTM 882 standard , Standard Test Method for Tensile Properties of Thin Plastic Sheet (ASTM International, West Conshohocken, PA, 2016):
the ASTM 882-9 standard originally uses a 250 mm grip distance and an initial strain rate of 0.1 mm / mm * min. However, for the purpose of obtaining measurements to calculate the elastic modulus materials of the present invention, a grip distance of 50 mm and an initial strain rate of 10 mm / mm * min are used. The modified dimensions and rates are the same as those used to obtain the other tensile properties (for example, tensile strength through tensile strength or elongation at break) of thin plastic films. Once a load-extension curve is generated as described in ASTM D882, the elastic modulus is determined by drawing a tangent to the initial linear portion of the load-extension curve, selecting any point on that tangent and dividing the stress traction by the corresponding deformation.
[0054] An example of a wound dressing set 10 where the elastic modulus of the absorbent body 1 is less than or equal to the elastic modulus of the backing layer 5 can be seen where: a) the absorbent body 1 is a non-woven substrate having a basis weight of about 50 gsm to about 200 gsm, optionally about 100 gsm and formed of (for example, connected by continuous spinning) polyurethane filaments (or fibers) having a filament / fiber diameter of about
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17/34 nm at about 20000 nm, optionally from about 100 nm to about 10,000 nm, and optionally from about 500 nm to about 3000 nm; and b) the backing layer 5 is selected from i) a layer of polyurethane film from 25 pm to 50 pm thick; or ii) a melt blown polyurethane non-woven fabric from 50 pm to 300 pm thick.
[0055] An example of a nonwoven polyurethane nanofilament substrate useful for the absorbent body 1 is Nanosan® Sorb / 100, available from SNS Nano Fiber technology, Hudson, OH, USA. Nanosan® Sorb / 100. The elastic modulus of Nanosan® Sorb / 100 was measured to be 0.2 MPa (or about 0.2 MPa). A more detailed discussion of such useful nanofiber nonwovens can be found in U.S. Patent 4,043,331, the patent of which is incorporated herein by reference in its entirety.
[0056] The elastic modulus of the melt blown polyurethane backing layer 5 was measured to be 2.2 MPa (or about 2.2 MPa). The wound set having an absorbent body 1 with an elastic modulus less than or equal to the elastic modulus of the support layer 5, reduces or avoids the restriction in the extensibility of the support layer 5 by adhering to the absorbent body 1. [0057] In certain embodiments, the elastic modulus of the support layer 5 can be in the range of about 1 MPa to about 50 MPa, or optionally from about 1.5 MPa to about 6 MPa.
[0058] In certain embodiments, backing layer 5 may include a vapor-moisture-permeable and liquid-impermeable polymeric film, although it may optionally include a variety of other materials, which are preferably used in combination with a vapor-moisture-permeable and liquid-impermeable polymer film. The vapor-moisture-permeable and liquid-impermeable polymeric film is a conformable organic polymeric material that retains,
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18/34 preferably, its structural integrity in a humid environment. For use in the present invention, conformable films are those that adapt to a surface, even by moving the surface, as with the surface of a body part. Suitable films have a composition and thickness that allow vapor-moisture to pass through them. The film assists in regulating the loss of water vapor from the wound area below the dressing. The film also acts as a barrier for both bacteria and liquid water or other liquids.
[0059] Vapor-moisture permeable polymeric films can have a wide range of thicknesses. Preferably, they are about 10 microns or 12 microns to 75 microns or 250 microns thick. In addition, they can include one or more layers adapted to have the desired properties. These layers can be coextruded and / or bonded together with a suitable adhesive, for example, as long as the general properties of the film and the article, as described in the present invention, are satisfied.
[0060] Examples of materials suitable for vapor-moisture-permeable and liquid-impermeable polymeric films include synthetic organic polymers including, but not limited to: commercially available polyurethanes from BF Goodrich, Cleveland, Ohio, USA, under the trade name ESTANE, including ESTANE 58237 and ESTANE 58245; polyamide block copolymers commercially available from Arkema, King of Prussia, Pa., USA, under the trade name PEBAX, including PEBAX MV 1074; polyester block copolymers commercially available from DuPont, Wilmington, Del., USA, under the trade name HYTREL. Polymeric films can be produced from one or more types of monomers (for example, copolymers) or mixtures (for example, blends) of polymers. An example material consists of
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19/34 thermoplastic polymers (for example, those that soften when exposed to heat and return to their original condition when cooled), such as thermoplastic polyurethane.
[0061] The backing layers of the backing layer 5 of the dressing sets 10 of the present invention can optionally be other breathable materials including, for example, non-woven, woven and knitted blankets, porous films (for example, provided by perforations or microporous structure), or other known supports. One of these non-woven blankets is a melt-processed polyurethane (like the one available under the trade name MORTHANE PS-440 from Morton International, Seabrook, NH, USA), or hydro-woven polyester or rayon polyester blankets ( such as those available under the trade name SONTARA 8010 or SONTARA 8411 from DuPont, Wilmington, Del., USA).
[0062] The backing layers of the backing layer 5 may be a combination of a vapor-moisture-permeable and liquid-impermeable polymeric film, a blanket of non-woven, fabric or steam-permeable mesh, or a film porous material that can, among other advantages, give accentuated structural integrity and better aesthetics to the dressings of the present invention. The layers within (or forming the) support layers are preferably bonded together with the use of a suitable adhesive layer, for example, which can be continuous or discontinuous (for example, such as that produced with an adhesive layer coated with standard), although other means of bonding can be used including thermomechanical bonding, such as thermowelding or ultrasonic welding.
[0063] In certain embodiments, the front surface support layer 5 may also come into contact or have a skin contact adhesive 8 attached to it to fix the set of
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20/34 injury 10 to a user's skin. In certain embodiments, the skin contact adhesive 8 contacts or is disposed on the front surface 5 'of the backing layer 5 within the outer zone 13. In general, any of a variety of pressure sensitive adhesives can be applied. used as an adhesive for skin contact 8. In particular, pressure sensitive adhesives that are biocompatible with human skin are typically used. In some embodiments, a skin contact adhesive 8 can also be generally soluble in water or generally insoluble, or dispersible in an aqueous environment. In certain embodiments, the skin contact adhesive 8 can, in general, be insoluble or dispersible in an aqueous environment. Suitable examples include, for example, a commercially available dispersible pressure sensitive adhesive that is sold under the name HL-9415-X, and available from H.B. Fuller Company. Another suitable adhesive includes from about 10 to 75% by weight of a polyalkyl oxazoline polymer, from 10 to 75% by weight of a functional diluent comprising a hydroxy compound or a carboxylic acid compound, and 5 to 50%, by weight, of a stickiness enhancer.
OPTIONAL COMPONENTS
WOUND CONTACT LAYER [0064] In certain embodiments, a layer for contact with wound 6 comes into contact with the first surface 2 of the absorbent body 1. Examples of such layers for contact with wound 6 include polymeric mesh and porous films (for example, perforated), or other conventional materials that prevent the dressing from sticking to the wound while allowing fluids to penetrate into the absorbent body 1. In certain embodiments, the wound contact layer 6 comes into contact with the absorbent body 1 by
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21/34 direct connection to the absorbent body 1 (for example, molded or thermomechanical connection), or by the use of an adhesive layer.
[0065] An example of a suitable wound contact layer consists of high density polyethylene (HDPE) networks that are available from Delnet Technologies (Del.) Under the Delnet® AC530WHT network name.
[0066] In some embodiments, as shown in Figures 7 to 8A, the layer for contact with wound 6 may have an elastic module that is larger than the elastic module of the absorbent body 1 so that the layer for contact with wound 6 is less extensible than the absorbent body 1. In such embodiments, the wound contact layer 6 is adhered to the first surface 2 of the absorbent body 1 so that the second surface 3 (adhered to the front surface 5 'of the support layer 5) the absorbent body 1 extends (or retains / maintains the extensibility in order to extend) directionally by means of the corresponding directional extension of the support layer 5. Consequently, the extensibility of the absorbent body 1 is such that through the adhesion of a layer for contact with wound 6 having the properties described above on the first surface 2 of the absorbent body 1, the second surface 3 (adhered to the front surface 5 'of the support layer 5 ) of the absorbent body 1 retains (or maintains) its ability to move or stretch directionally (for example, in response to the corresponding directional movement or stretch in the adherent part of the support layer 5 and its front surface 5 ') regardless of any restriction in movement or stretching of the first surface 2 of the absorbent body 1 due to its adherence to the layer for contact with the less extensible wound 6.
[0067] In certain modalities, the elastic modulus of the absorbent body 1 is 25% less than, optionally 50% less than,
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22/34 optionally 75% less than, or optionally 95% less than the elastic modulus of the layer for contact with the wound 6.
REMOVABLE STRIP [0068] A removable strip 7 can be used to cover any exposed adhesive on the absorbent body 1 or the backing layer 5. The removable strip 7 can be in the form of a unitary layer or segmented portions of a layer. Removable strips 7 can be made with kraft paper, polyethylene, polypropylene, polyester, polystyrene (such as high impact polystyrene) or composites of any of these materials. In one embodiment, the removable strips 7 are coated with release agents such as fluorochemicals or silicones. For example, U.S. Patent No. 4,472,480, the disclosure of which is hereby incorporated by reference, describes low surface energy perfluoro-chemical strips. In one embodiment, the removable strips 7 are paper, polyolefin films or polyester films coated with silicone release materials. Examples of commercially available silicone coated release papers are provided from Wausau Paper Specialty Products (Rhinelander, Wis., USA) and Mondi Packaging (Lancaster, Ohio, USA). A suitable removable strip is a bleached strip of kraft paper SC RLSE D11 442-6001 No. 60 by 279 square meters (per 300 square feet) available from Wausau Paper Specialty Products. Optionally, the removable strip 7 can include a flap that facilitates easy removal of the removable strip from the support layer 5 or absorbent body 1 from the dressing set 10.
[0069] Although the specific modalities of this invention have been shown and described in the present invention, it should be understood that these modalities are merely illustrative of the many possible specific provisions that can be developed in the application of the principles of the invention. Numerous and varied other provisions can be designed according to these principles
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23/34 by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should not be limited to the structures described in this application, but only by the structures described by the language of the claims and the equivalents of those structures.
MODALITIES OF THE PRESENT INVENTION:
[0070] 1. A wound dressing set, comprising:
The. an extensible absorbent body having a longitudinally extending center line, a transversely extending center line and a periphery, the absorbent body having a first surface and a second surface, the second surface being opposite the first surface;
B. a positioning adhesive in contact with at least a portion of the second surface of the absorbent body;
ç. an extensible support layer adhered to the second surface of the absorbent body by the positioning adhesive so that the directional extension of the support layer causes a corresponding directional extension of the second surface of the absorbent body; and
d. a wound contact layer that is less extensible than the absorbent body, the wound contact layer arranged on the first surface of the absorbent body so that the second surface of the absorbent body extends over the corresponding length of the layer of absorbent Support.
[0071] 2. The wound dressing set, according to modality 1, the absorbent body being in the form of a single layer or multilayer material.
[0072] 3. The wound dressing set, according to modalities 1 and / or 2, with the absorbent body comprising crimped cellulose filling; melt blowing polymers; fibers
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24/34 chemically stiffened, modified or cross-linked cellulosic; fabric; absorbent foams; absorbent sponges; superabsorbent polymers; absorbent gelling materials; or combinations of such materials.
[0073] 4. The wound dressing set, according to any of the combinations of modalities 1 to 3, with the absorbent body comprising a blanket produced by electrospinning; a non-woven; a fabric; film; a whisk; by continuous wiring; by hydroentanglement; hydroentangled; carded; perforated by needle; wet or any other suitable material.
[0074] 5. The wound dressing set, according to any of the combinations of modalities 1 to 4, with the absorbent body comprising a foam material.
[0075] 6. The wound dressing set, according to any of the combinations of modalities 1 to 5, the foam material comprising a polymer comprising one or more types of monomers or polymer blend.
[0076] 7. The wound dressing set, according to any of the combinations of modalities 1 to 6, the foam material being open cell foam.
[0077] 8. The wound dressing set, according to any of the combinations of modalities 1 to 7, with the foam material being a synthetic organic polymer of open cell foam selected from polyurethanes, butadiene-styrene rubbers. carboxylates, polyesters, polyacrylates or mixtures thereof.
[0078] 9. The wound dressing set, according to any of the combinations of modalities 1 to 8, with the absorbent body comprising hydrocolloids.
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25/34 [0079] 10. The wound dressing set, according to any of the combinations of modalities 1 to 9, in which the hydrocolloids are selected from sodium carboxy methyl cellulose, pectin, xanthan gum, polysaccharides, alginate sodium or calcium, chitosan, kelp extract (carrageenan), polyaspartic acid, polyglutamic acid, hyaluronic acid or salts and derivatives thereof and mixtures thereof.
[0080] 11. The wound dressing set, according to any of the combinations of modalities 1 to 10, in which the position adhesive comes into contact with the second surface of the absorbent body to form a continuous or discontinuous layer or area positioning adhesive surface.
[0081] 12. The wound dressing set, according to any of the combinations of modalities 1 to 11, with the support layer having a periphery so that the periphery of the support layer extends beyond at least one peripheral portion of the absorbent body.
[0082] 13. A wound dressing set, comprising:
d. an extensible absorbent body having a longitudinally extending center line, a transversely extending center line and a periphery, the absorbent body having a first surface, a second surface and an elastic module, the second surface being opposite the first surface;
and. a positioning adhesive in contact with at least a portion of the second surface of the absorbent body;
f. a support layer having an elastic module, the support layer adhered to the second surface of the absorbent body through the positioning adhesive
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26/34 [0083] and the elastic modulus of the absorbent body is less than or equal to the elastic modulus of the support layer.
[0084] 14. The wound dressing set, according to modality 13, in which the elastic modulus of the support layer is from about 1 MPa to about 50 MPa.
[0085] 15. The wound dressing set, according to modalities 13 and / or 14, in which the elastic modulus of the support layer is from about 1.5 MPa to about 6 MPa.
[0086] 16. The wound dressing set, according to any of the combinations of modalities 13 to 15, the absorbent body being a non-woven substrate having a base weight of about 50 gsm to about 200 gsm and formed of polyurethane filaments having a filament diameter of about 500 nm to about 3000 nm.
[0087] 17. The wound dressing set, according to any of the combinations of modalities 13 to 16, the support layer being selected from i) a layer of polyurethane film with a thickness of 25 pm to 50 pm ; or ii) a melt blown polyurethane non-woven fabric from 50 pm to 300 pm thick.
[0088] 18. The wound dressing set, according to any of the combinations of modalities 13 to 17, the absorbent body being in the form of a single layer or multilayer material.
[0089] 19. The wound dressing set, according to any of the combinations of modalities 13 to 18, with the absorbent body comprising crimped cellulose filling; melt blowing polymers; chemically stiffened, modified or cross-linked cellulosic fibers; fabric; absorbent foams; sponges
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27/34 absorbents; superabsorbent polymers; absorbent gelling materials; or combinations of such materials.
[0090] 20. The wound dressing set, according to any of the combinations of modalities 13 to 19, the absorbent body comprising a blanket produced by electrospinning; a non-woven; a fabric; film; a whisk; by continuous wiring; by hydroentanglement; hydroentangled; carded; perforated by needle; wet or any other suitable material.
[0091] 21. The wound dressing set, according to any of the combinations of modalities 13 to 20, the absorbent body comprising a foam material.
[0092] 22. The wound dressing set, according to any of the combinations of modalities 13 to 21, the foam material comprising a polymer comprising one or more types of monomers or polymer blend.
[0093] 23. The wound dressing set, according to any of the combinations of modalities 13 to 22, the foam material being open cell foam.
[0094] 24. The wound dressing set, according to any of the combinations of modalities 13 to 23, the foam material being an open cell foam synthetic organic polymer selected from polyurethanes, butadiene-styrene rubbers carboxylates, polyesters, polyacrylates or mixtures thereof.
[0095] 25. The wound dressing set, according to any of the combinations of modalities 13 to 24, the absorbent body comprising hydrocolloids.
[0096] 26. The wound dressing set, according to any of the combinations of modalities 13 to 25, in which the hydrocolloids are selected from sodium carboxy methyl cellulose,
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28/34 pectin, xanthan gum, polysaccharides, sodium or calcium alginate, chitosan, kelp extract (carrageenan), polyglutamic acid, hyaluronic acid or salts and derivatives of these substances and mixtures thereof.
[0097] 27. The wound dressing set, according to any of the combinations of modalities 13 to 26, in which the position adhesive comes into contact with the second surface of the absorbent body to form a continuous or discontinuous layer or area positioning adhesive surface.
[0098] 28. The wound dressing set, according to any of the combinations of modalities 13 to 27, with the support layer having a periphery so that the periphery of the support layer extends beyond at least one peripheral portion of the absorbent body.
[0099] 29. A wound dressing set, comprising:
B. an absorbent body having a longitudinally extending center line, a transversely extending center line and a periphery, the absorbent body having a first surface and a second surface, the second surface being opposite the first surface, the second surface having:
d. an adhesive in contact with the second surface of the absorbent body so as to form a region of the positioning adhesive in the center of the second surface of the absorbent body, the region of the positioning adhesive having a periphery;
and. a support layer adhered to the second surface of the absorbent body by the positioning adhesive region, the support layer having an internal zone at least partially surrounded by an external zone,
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29/34 [00100] so that the periphery of the positioning adhesive region defines an internal contour of a surface area of the support layer, so that the surface area of the support layer extends from the periphery of the region of the support layer. positioning adhesive in a direction in the opposite direction from the periphery of the positioning adhesive region, in addition to at least a portion of the periphery of the absorbent body 1, towards the outer zone of the support layer, such surface area being exempt, or substantially free of adhesive. [00101] 30. The wound dressing set, according to modality 29, with the positioning adhesive region being continuous.
[00102] 31. The wound dressing set, according to modality 29 and / or 30, with the positioning adhesive region being discontinuous.
[00103] 32. The wound dressing set, according to any of the combinations of modalities 29 to 31, the absorbent body being in the form of a single layer or multilayer material.
[00104] 33. The wound dressing set, according to any of the combinations of modalities 29 to 32, with the absorbent body comprising crimped cellulose filling; melt blowing polymers; chemically stiffened, modified or cross-linked cellulosic fibers; fabric; absorbent foams; absorbent sponges; superabsorbent polymers; absorbent gelling materials; or combinations of such materials.
[00105] 34. The wound dressing set, according to any of the modalities combinations 29 to 33, the absorbent body comprising a blanket produced by electrospinning; a non-woven; a fabric; film; a whisk; by continuous wiring;
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30/34 by hydroentanglement; hydroentangled; carded; perforated by needle; wet or any other suitable material. [00106] 35. The wound dressing set, according to any of the combinations of modalities 29 to 34, the absorbent body comprising a foam material.
[00107] 36. The wound dressing set, according to any of the combinations of modalities 29 to 35, the foam material comprising a polymer comprising one or more types of monomers or polymer blend.
[00108] 37. The wound dressing set, according to any of the combinations of modalities 29 to 36, the foam material being open cell foam.
[00109] 38. The wound dressing set, according to any of the combinations of modalities 29 to 37, the foam material being a synthetic organic polymer of open cell foam selected from polyurethanes, butadiene-styrene rubbers carboxylates, polyesters, polyacrylates or mixtures thereof.
[00110] 39. The wound dressing set, according to any of the combinations of modalities 29 to 38, the absorbent body comprising hydrocolloids.
[00111] 40. The wound dressing set, according to any of the combinations of modalities 29 to 39, in which the hydrocolloids are selected from sodium carboxy methyl cellulose, pectin, xanthan gum, polysaccharides, sodium alginate or calcium, chitosan, kelp extract (carrageenan), polyglutamic acid, hyaluronic acid or salts and derivatives of these substances and mixtures thereof.
[00112] 41. The wound dressing set, according to any of the combinations of modalities 29 to 40, in which the
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31/34 position adhesive contacts the second surface of the absorbent body to form a continuous or discontinuous layer or surface area of positioning adhesive.
[00113] 42. The wound dressing set, according to any of the combinations of modalities 29 to 41, with the support layer having a periphery so that the periphery of the support layer extends beyond at least one peripheral portion of the absorbent body.
[00114] 43. A wound dressing set, comprising:
B. an absorbent body having a longitudinally extending center line, a transversely extending center line and a periphery, the absorbent body having a first surface and a second surface, the second surface being opposite the first surface, the second surface having:
d. an adhesive in contact with the second surface of the absorbent body to form a region of the positioning adhesive that extends substantially along the central line that extends transversely,
and. a support layer adhered to the second surface of the absorbent body by the region of the positioning adhesive, the support layer having an internal zone at least partially surrounded by an external zone, [00115] with the region of the positioning adhesive having a first side and a second side, opposite the first side, so that when the positioning adhesive region comes into contact with the support layer:
i. the first side defines an end of a first surface area of the support layer that extends from the first side, beyond the periphery of the absorbent body, to the zone
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32/34 external of the support layer towards the central line that extends longitudinally; and ii. the second side defines an end of a second surface area of the support layer that extends from the second side, in addition to the periphery of the absorbent body, to the outer zone of the support layer towards the longitudinally extending center line and opposite the direction of the first surface area, the first and second surface areas being substantially free of adhesive.
[00116] 44. The wound dressing set, according to modality 43, with the positioning adhesive region being continuous.
[00117] 45. The wound dressing set, according to modalities 43 and / or 44, the positioning adhesive region being discontinuous.
[00118] 46. The wound dressing set, according to any of the combinations of modalities 43 to 45, the absorbent body being in the form of a single layer or multilayer material.
[00119] 47. The wound dressing set, according to any of the combinations of modalities 43 to 46, with the absorbent body comprising crimped cellulose filling; melt blowing polymers; chemically stiffened, modified or cross-linked cellulosic fibers; fabric; absorbent foams; absorbent sponges; superabsorbent polymers; absorbent gelling materials; or combinations of such materials.
[00120] 48. The wound dressing set, according to any of the combinations of modalities 43 to 47, the absorbent body comprising a blanket produced by electrospinning; a non-woven; a fabric; film; a whisk; by continuous wiring;
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33/34 by hydroentanglement; hydroentangled; carded; perforated by needle; wet or any other suitable material. [00121] 49. The wound dressing set, according to any of the combinations of modalities 43 to 48, the absorbent body comprising a foam material.
[00122] 50. The wound dressing set, according to any of the combinations of modalities 43 to 49, the foam material comprising a polymer comprising one or more types of monomers or polymer blend.
[00123] 51. The wound dressing set, according to any of the combinations of modalities 43 to 50, the foam material being open cell foam.
[00124] 52. The wound dressing set, according to any of the combinations of modalities 43 to 51, the foam material being a synthetic organic polymer of open cell foam selected from polyurethanes, butadiene-styrene rubbers carboxylates, polyesters, polyacrylates or mixtures thereof.
[00125] 53. The wound dressing set, according to any of the combinations of modalities 43 to 52, with the absorbent body comprising hydrocolloids.
[00126] 54. The wound dressing set, according to any of the combinations of modalities 43 to 53, in which the hydrocolloids are selected from sodium carboxy methyl cellulose, pectin, xanthan gum, polysaccharides, sodium alginate or calcium, chitosan, kelp extract (carrageenan), polyaspartic acid, polyglutamic acid, hyaluronic acid or salts and derivatives of these substances and mixtures thereof.
[00127] 55. The wound dressing set, according to any of the combinations of modalities 43 to 54, in which the
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34/34 position adhesive contacts the second surface of the absorbent body to form a continuous or discontinuous layer or surface area of positioning adhesive.
[00128] 56. The wound dressing set, according to any of the combinations of modalities 43 to 55, the support layer having a periphery so that the support layer periphery extends beyond at least one peripheral portion of the absorbent body.

权利要求:
Claims (56)
[1]
1. Wound dressing set, characterized by the fact that it comprises:
The. an extensible absorbent body having a longitudinally extending center line, a transversely extending center line and a periphery, the absorbent body having a first surface and a second surface, the second surface being opposite the first surface;
B. a positioning adhesive in contact with at least a portion of the second surface of the absorbent body;
ç. an extensible support layer adhered to the second surface of the absorbent body by the positioning adhesive so that the directional extension of the support layer causes a corresponding directional extension of the second surface of the absorbent body; and
d. a wound contact layer that is less extensible than the absorbent body, the wound contact layer arranged on the first surface of the absorbent body so that the second surface of the absorbent body extends over the corresponding length of the layer of absorbent Support.
[2]
2. Wound dressing set according to claim 1, characterized in that the absorbent body is in the form of a single layer or multilayer material.
[3]
3. Wound dressing set according to claim 1 and / or 2, characterized by the fact that the absorbent body comprises crimped cellulose filling; melt blowing polymers; chemically stiffened, modified or cross-linked cellulosic fibers; fabric; absorbent foams; absorbent sponges; superabsorbent polymers; absorbent gelling materials; or combinations of such materials.
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12/2
[4]
4. Wound dressing set according to any of the combinations of claims 1 to 3, characterized by the fact that the absorbent body comprises a blanket produced by electrospinning; a non-woven; a fabric; film; a whisk; by continuous wiring; by hydroentanglement; hydroentangled; carded; perforated by needle; wet or any other suitable material.
[5]
5. Wound dressing set according to any of the combinations of claims 1 to 4, characterized in that the absorbent body comprises a foam material.
[6]
6. Wound dressing set according to any of the combinations of claims 1 to 5, characterized in that the foam material comprises a polymer comprising one or more types of monomers or polymer blend.
[7]
7. Wound dressing set according to any of the combinations of claims 1 to 6, characterized in that the foam material is an open cell foam.
[8]
8. Wound dressing set according to any of the combinations of claims 1 to 7, characterized by the fact that the foam material is a synthetic organic polymer of open cell foam selected from polyurethanes, carboxylated butadiene-styrene rubbers. , polyesters, polyacrylates or mixtures thereof.
[9]
9. Wound dressing set according to any of the combinations of claims 1 to 8, characterized by the fact that the absorbent body comprises hydrocolloids.
[10]
10. Wound dressing set according to any of the combinations of claims 1 to 9, characterized by the fact that hydrocolloids are selected from methyl carboxy
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3/12 sodium cellulose, pectin, xanthan gum, polysaccharides, sodium or calcium alginate, chitosan, kelp extract (carrageenan), polyaspartic acid, polyglutamic acid, hyaluronic acid or salts and mixtures thereof.
[11]
11. Wound dressing set according to any of the combinations of claims 1 to 10, characterized in that the position adhesive comes into contact with the second surface of the absorbent body to form a continuous or discontinuous layer or area of positioning adhesive surface.
[12]
12. Wound dressing set according to any of the combinations of claims 1 to 11, characterized in that the support layer has a periphery so that the support layer periphery extends beyond at least a portion the periphery of the absorbent body.
[13]
13. Wound dressing set, characterized by the fact that it comprises:
The. an extensible absorbent body having a longitudinally extending center line, a transversely extending center line and a periphery, the absorbent body having a first surface, a second surface and an elastic module, the second surface being opposite the first surface ;
B. a positioning adhesive in contact with at least a portion of the second surface of the absorbent body;
ç. a support layer having an elastic module, the support layer adhered to the second surface of the absorbent body through the positioning adhesive, the elastic module of the absorbent body being equal to or less than the elastic module of the support layer.
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4/12
[14]
14. Wound dressing set according to claim 13, characterized in that the elastic modulus of the support layer is from about 1 MPa to about 50 MPa.
[15]
15. Wound dressing set according to claims 13 and / or 14, characterized in that the elastic modulus of the support layer is from about 1.5 MPa to about 6 MPa.
[16]
16. Wound dressing set according to any of the combinations of claims 13 to 15, characterized in that the absorbent body is a non-woven substrate having a base weight of about 50 gsm to about 200 gsm and formed of polyurethane filaments having a filament diameter of about 500 nm to about 3000 nm.
[17]
17. Wound dressing set according to any of the combinations of claims 13 to 16, characterized in that the backing layer is selected from i) a layer of polyurethane film with a thickness of 25 pm to 50 pm; or ii) a melt blown polyurethane non-woven fabric from 50 pm to 300 pm thick.
[18]
18. Wound dressing set according to any of the combinations of claims 13 to 17, characterized by the fact that the absorbent body is in the form of a single layer or multilayer material.
[19]
19. Wound dressing set according to any of the combinations of claims 13 to 18, characterized by the fact that the absorbent body comprises crimped cellulose filling; melt blowing polymers; chemically stiffened, modified or cross-linked cellulosic fibers; fabric; absorbent foams; absorbent sponges; superabsorbent polymers; absorbent gelling materials; or combinations of such materials.
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5/12
[20]
20. Wound dressing set, according to any of the combinations of claims 13 to 19, characterized by the fact that the absorbent body comprises a blanket produced by electrospinning; a non-woven; a fabric; film; a whisk; by continuous wiring; by hydroentanglement; hydroentangled; carded; perforated by needle; wet or any other suitable material.
[21]
21. Wound dressing set according to any of the combinations of claims 13 to 20, characterized in that the absorbent body comprises a foam material.
[22]
22. Wound dressing set according to any of the combinations of claims 13 to 21, characterized in that the foam material comprises a polymer comprising one or more types of monomers or polymer blend.
[23]
23. Wound dressing set according to any of the combinations of claims 13 to 22, characterized in that the foam material is an open cell foam.
[24]
24. Wound dressing set according to any of the combinations of claims 13 to 23, characterized by the fact that the foam material is a synthetic organic polymer of open cell foam selected from polyurethanes, carboxylated butadiene-styrene rubbers , polyesters, polyacrylates or mixtures thereof.
[25]
25. Wound dressing set according to any of the combinations of claims 13 to 24, characterized by the fact that the absorbent body comprises hydrocolloids.
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6/12
[26]
26. Wound dressing set according to any of the combinations of claims 13 to 25, characterized in that the hydrocolloids are selected from sodium methyl carboxy cellulose, pectin, xanthan gum, polysaccharides, sodium or calcium alginate , chitosan, algae extract (carrageenan), polyaspartic acid, polyglutamic acid, hyaluronic acid or salts and derivatives thereof and mixtures thereof.
[27]
27. Wound dressing set according to any of the combinations of claims 13 to 26, characterized in that the position adhesive comes into contact with the second surface of the absorbent body to form a continuous or discontinuous layer or area of positioning adhesive surface.
[28]
28. Wound dressing set according to any of the combinations of claims 13 to 27, characterized in that the support layer has a periphery so that the support layer periphery extends beyond at least a portion the periphery of the absorbent body.
[29]
29. Wound dressing set, characterized by the fact that it comprises:
The. an absorbent body having a longitudinally extending center line, a transversely extending center line and a periphery, the absorbent body having a first surface and a second surface, the second surface being opposite the first surface, the second surface having;
B. an adhesive in contact with the second surface of the absorbent body so as to form a region of the positioning adhesive in the center of the second surface of the absorbent body, the region of the positioning adhesive having a periphery;
ç. a support layer adhered to the second surface of the absorbent body by the positioning adhesive region, the layer
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7/12 of support having an internal zone at least partially surrounded by an external zone, so that the periphery of the positioning adhesive region defines an internal contour of a surface area of the support layer, so that the surface area of the support layer extends from the periphery of the positioning adhesive region in a direction opposite to the periphery of the positioning adhesive region, in addition to at least a portion of the periphery of the absorbent body 1, to the external zone of the positioning adhesive layer. such surface area being free of, or substantially free of, adhesive.
[30]
30. Wound dressing set according to claim 29, characterized by the fact that the positioning adhesive region is continuous.
[31]
31. Wound dressing set according to claim 29 and / or 30, characterized by the fact that the positioning adhesive region is discontinuous.
[32]
32. Wound dressing set according to any of the combinations of claims 29 to 31, characterized by the fact that the absorbent body is in the form of a single layer or multilayer material.
[33]
33. Wound dressing set according to any of the combinations of claims 29 to 32, characterized by the fact that the absorbent body comprises crimped cellulose filling; melt blowing polymers; chemically stiffened, modified or cross-linked cellulosic fibers; fabric; absorbent foams; absorbent sponges; superabsorbent polymers; absorbent gelling materials; or combinations of such materials.
[34]
34. Wound dressing set according to any of the combinations of claims 29 to 33, characterized by the fact that the absorbent body comprises a blanket produced by electrospinning; a non-woven; a fabric; film;
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8/12 a batting; by continuous wiring; by hydroentanglement; hydroentangled; carded; perforated by needle; wet or any other suitable material.
[35]
35. Wound dressing set according to any of the combinations of claims 29 to 34, characterized in that the absorbent body comprises a foam material.
[36]
36. Wound dressing set according to any of the combinations of claims 29 to 35, characterized in that the foam material comprises a polymer comprising one or more types of monomers or polymer blend.
[37]
37. Wound dressing set according to any of the combinations of claims 29 to 36, characterized in that the foam material is an open cell foam.
[38]
38. Wound dressing set according to any of the combinations of claims 29 to 37, characterized by the fact that the foam material is a synthetic organic polymer of open cell foam selected from polyurethanes, carboxylated butadiene-styrene rubbers , polyesters, polyacrylates or mixtures thereof.
[39]
39. Wound dressing set according to any of the combinations of claims 29 to 38, characterized by the fact that the absorbent body comprises hydrocolloids.
[40]
40. Wound dressing set according to any of the combinations of claims 29 to 39, characterized by the fact that hydrocolloids are selected from sodium methyl cellulose carboxy, pectin, xanthan gum,
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9/12 polysaccharides, sodium or calcium alginate, chitosan, polyglutamic acid, hyaluronic acid or salts and derivatives thereof and mixtures thereof.
[41]
41. Wound dressing set according to any of the combinations of claims 29 to 40, characterized in that the position adhesive contacts the second surface of the absorbent body to form a continuous or discontinuous layer or area of positioning adhesive surface.
[42]
42. Wound dressing set according to any of the combinations of claims 29 to 41, characterized in that the support layer has a periphery so that the periphery of the support layer extends beyond at least a portion the periphery of the absorbent body.
[43]
43. Wound dressing set, characterized by the fact that it comprises:
The. an absorbent body having a longitudinally extending center line, a transversely extending center line and a periphery, the absorbent body having a first surface and a second surface, the second surface being opposite the first surface, the second surface having:
B. an adhesive in contact with the second surface of the absorbent body to form a region of the positioning adhesive that extends substantially along the central line that extends transversely,
ç. a support layer adhered to the second surface of the absorbent body by the region of the positioning adhesive, the support layer having an internal zone at least partially surrounded by an external zone.
where the positioning adhesive region has a first side and a second side, opposite the first side, so that
Petition 870180135611, of 28/09/2018, p. 59/231
10/12 when the positioning adhesive region comes into contact with the support layer:
i. the first side defines an end of a first surface area of the support layer extending from the first side, in addition to the periphery of the absorbent body, to the outer zone of the support layer in the direction of the longitudinally extending center line; and ii. the second side defines an end of a second surface area of the support layer that extends from the second side, in addition to the periphery of the absorbent body, to the outer zone of the support layer towards the longitudinally extending center line and opposite the direction of the first surface area, the first and second surface areas being substantially free of adhesive.
[44]
44. Wound dressing set according to claim 43, characterized by the fact that the positioning adhesive region is continuous.
[45]
45. Wound dressing set according to claims 43 and / or 44, characterized by the fact that the positioning adhesive region is discontinuous.
[46]
46. Wound dressing set according to any of the combinations of claims 43 to 45, characterized by the fact that the absorbent body is in the form of a single layer or multilayer material.
[47]
47. Wound dressing set according to any of the combinations of claims 43 to 46, characterized in that the absorbent body comprises crimped cellulose filling; melt blowing polymers; chemically stiffened, modified or cross-linked cellulosic fibers; fabric; foams
Petition 870180135611, of 28/09/2018, p. 60/231
11/12 absorbents; absorbent sponges; superabsorbent polymers; absorbent gelling materials; or combinations of such materials.
[48]
48. Wound dressing set according to any of the combinations of claims 43 to 47, characterized by the fact that the absorbent body comprises a blanket produced by electrospinning; a non-woven; a fabric; film; a whisk; by continuous wiring; by hydroentanglement; hydroentangled; carded; perforated by needle; wet or any other suitable material.
[49]
49. Wound dressing set according to any of the combinations of claims 43 to 48, characterized in that the absorbent body comprises a foam material.
[50]
50. Wound dressing set according to any of the combinations of claims 43 to 49, characterized in that the foam material comprises a polymer comprising one or more types of monomers or polymer blend.
[51]
51. Wound dressing set according to any of the combinations of claims 43 to 50, characterized in that the foam material is an open cell foam.
[52]
52. Wound dressing set according to any of the combinations of claims 43 to 51, characterized by the fact that the foam material is a synthetic organic polymer of open cell foam selected from polyurethanes, carboxylated butadiene-styrene rubbers , polyesters, polyacrylates or mixtures thereof.
[53]
53. Wound dressing set according to any of the combinations of claims 43 to 52,
Petition 870180135611, of 28/09/2018, p. 61/231
12/12 characterized by the fact that the absorbent body comprises hydrocolloids.
[54]
54. Wound dressing set according to any of the combinations of claims 43 to 53, characterized by the fact that hydrocolloids are selected from sodium methyl carboxy cellulose, pectin, xanthan gum, polysaccharides, sodium or calcium alginate , chitosan, seaweed extract (carrageenan), polyaspartic acid, polyglutamic acid, hyaluronic acid or salts and derivatives of these substances and mixtures thereof.
[55]
55. Wound dressing set according to any of the combinations of claims 43 to 54, characterized in that the position adhesive comes into contact with the second surface of the absorbent body to form a continuous or discontinuous layer or area of positioning adhesive surface.
[56]
56. Wound dressing set according to any of the combinations of claims 43 to 55, characterized by the fact that the support layer has a periphery so that the support layer periphery extends beyond at least a portion the periphery of the absorbent body.

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同族专利:

公开号 | 公开日

US20190099297A1|2019-04-04|

US20190099295A1|2019-04-04|

EP3461466A3|2019-07-17|

US20190099296A1|2019-04-04|

US11202721B2|2021-12-21|

CA3019075A1|2019-03-29|

EP3461466B1|2022-01-12|

CN109568009A|2019-04-05|

RU2018134191A3|2021-08-25|

RU2018134191A|2020-04-01|

RU2763479C2|2021-12-29|

US11202722B2|2021-12-21|

EP3461466A2|2019-04-03|

US20190099294A1|2019-04-04|

MX2018011872A|2019-05-20|

MA49818A|2021-05-05|

JP2019063519A|2019-04-25|

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法律状态:
2019-04-16| B03A| Publication of a patent application or of a certificate of addition of invention [chapter 3.1 patent gazette]|

优先权:

申请号 | 申请日 | 专利标题

US201762565604P| true| 2017-09-29|2017-09-29|

US62/565,604|2017-09-29|

US201762576210P| true| 2017-10-24|2017-10-24|

US62/576,210|2017-10-24|

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