• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    METHOD AND DEVICE FOR JOINING TRANSFER OR LAMINATION FILM BLANKETS. The present invention relates to a method for joining a first and second film webs (2, 2 ') of a transfer film or laminating film, wherein the film webs (2, 2') comprise a loading film thermoplastic (21) and a decorative layer (23). Formed between the first and second sheets of film (2, 2 ') is a common joining part (3), in which the first and second sheets of film (2, 2') are joined together by a welding process. A device for carrying out the method is also described
    公开号:BR112014004633B1
    申请号:R112014004633-6
    申请日:2012-07-31
    公开日:2020-07-28
    发明作者:Achim Hansen；Thomas Bernet
    申请人:Ovd Kinegram Ag；
    IPC主号:
    专利说明:

    [001] The present invention relates to a method and a device for joining two sheets of transfer film or lamination, comprising a thermoplastic loading film and a decorative layer.
    [002] In the processing and use of transfer films and laminating films, the parts of the film must often be joined together in order to assemble the correspondingly longer "run" from the thickest blankets or film strips short.
    [003] The runs in particular result both from consumer demands, for example, to increase productivity using very long cutting rollers and from demand to minimize waste, since starting times or downtime, in particular for changing the rollers are reduced.
    [004] In "domestic" film production and processing, there is also a need to join film sheets together to increase productivity, minimize waste and reduce start-up times, downtime and start-up processes.
    [005] The most common method is to join, also called "mending", by means, in particular, of manually attaching adhesive tapes. At present, the corresponding films are glued using self-adhesive tapes common on the market. Lamination or transfer films (films coated on one side with a transfer layer) are typically glued to the uncoated side of the film. The width of the adhesive tape is typically in the range of 2 to 5 cm. Typical thicknesses for adhesive tapes are in the range of approximately 30 to 130 pm.
    [006] Patches with tape have proven to be valid in recent years and offer a variety of advantages. The method is cost-effective, can be carried out with a relatively high registration accuracy of the films in relation to each other and the splice, that is, the junction tip or junction seam, has high strengths, in particular, tensile strength in the direction the path of the films. In addition, adhesive tapes are often used to characterize particular types of splices and to make them visually distinguishable.
    [007] However, splicing using adhesive tapes has a variety of disadvantages.
    [008] When stamping individual images, these images or individual motifs, that is, the panels, are arranged in a specific outline on the film, in particular, on regular lines and tracks. The panels to be printed usually extend so close that the adhesive tape extends in the area of the printing area and, at the same time, in the area of the panels to be printed, such that these overlapping panels cannot be printed and are lost. In particular, this can lead to embossing errors and / or contamination of the embossing tool by the adhesive tape or by the adhesive tape emerging from the edge. The splice is therefore detected and the film advances, whereby there is a loss of material and productivity is reduced.
    [009] When stamping individual images on parallel tracks, it is also required that the seam points reach the stamping unit at the same time, as the stamping process has to be interrupted on all rails or all panels have to be skipped at the same time and all these panels are lost. If the seams are at different points on the films, the printing process must be interrupted for longer times or repeated several times.
    [0010] In stamping individual images through various applications, additional problems arise. At present, the repetition of individual images, that is, the space between individual images, must be exactly in agreement. For this reason, only pieces of film with the same repetition can be spliced.
    [0011] With the spliced rollers it is possible that, at the seam point -caused by the highest pressure -the cold adhesive appears on the edge of the seam tape or the roll is "blocked", that is, the adjacent windings in the roll are together.
    [0012] Using tape splicing requires a greater expenditure on control engineering.
    [0013] The use of narrower adhesive tapes with a width of less than 1 cm is generally not possible because the required strengths, in particular tensile strengths during processing, cannot be reliably achieved with narrow adhesive tapes and the point splice can also open due to tensile forces during winding or inside the roll.
    [0014] The aim of the present invention is to provide an improved method and an improved device that avoids the aforementioned disadvantages.
    [0015] This objective is achieved according to the invention with a method for joining a first and a second film sheet of a transfer film or laminating film, wherein the film blankets comprise a thermoplastic loading film and a decorative layer , and in which it is established that a common joining part is formed between the first and second layers of film, in which the first and second layers of film are joined together by means of a welding process.
    [0016] The objective is additionally achieved with a device for the joining of positive substance of the first and second film sheets of a transfer film and a laminating film, wherein the film sheets comprise a thermoplastic loading film and a decorative layer , and in which the decorative layer highlights motifs and / or trademarks, and in which the device is to comprise support devices for the first and second sheets of film and at least one welding head, which is arranged above a part for joining the first and second film webs, and that at least one of the support devices is immovably joined to an adjustment device.
    [0017] It has been surprisingly shown that a durable and elastic welded joint occurs even though the film webs to be welded are formed as multilayer bodies, which comprise additional layers in addition to the weldable thermoplastic loading film, whose layers can reduce or inhibit the resistance of the welded joint.
    [0018] Furthermore, after welding, the films are very flat with no disadvantageous thickening points due to an additional adhesive tape in the seam area and they practically exhibit no changes in dimension, in particular, uni or bidimensional deformations, which it is very important, for example, for subsequent processes such as cutting and packaging processes.
    [0019] Transfer films are films that the decorative layer from which is transferred by a stamping tool that uses pressure and / or temperature on a substrate to be decorated. A carrier film made of a thermoplastic in which a removable decorative layer is arranged forms the base of the transfer film.
    [0020] In addition to one or more decoration layers that support the decoration, the decorative layer can comprise more layers, for example, an adhesive layer, an activation layer for the adhesive layer and a separator layer to make it easier to detach the layer decoration of a loader film.
    [0021] A decoration layer or the various decoration layers can, for example, each be formed as an optionally dyed, transparent, translucent or opaque lacquer layer, as a fluorescent or phosphorescent lacquer layer, as a layer optionally variable and / or as a metallic or non-metallic reflective layer. A decorative layer can then be formed as a pigmented lacquer layer, with the result that color effects can be formed and alphanumeric images and signs or symbols can be represented. The decorative layer can be a functional layer, for example, a magnetic layer, a photo polymer layer or a layer of conductive, semiconductor or non-conductive polymers. Films with such decorative layers can be used in the field of magnetic films, to protect banknotes and documents against counterfeiting, for external applications, for example, chrome films for license plates or other decorations, in the field of IMD or IML technologies (IMD = Mold Decoration; IML = Mold Labeling) for antenna applications and for labels for a wide variety of applications. Furthermore, combinations of the aforementioned decoration layers can be carried out, in which the different layers are present directly or indirectly close to each other in a decoration layer. The layer thickness of such a decoration layer is preferably between 1 pm and 25 pm, even more preferably between 1 pm and 5 pm. An optically variable layer can be formed by a reproduction lacquer layer with a surface relief that acts diffractively and / or refractively molded, a hologram layer, a hologram layer with volume, a thin film coating system, which generates effects of color change through interference, a liquid crystal layer or a layer containing pigments, for example, optically variable interface layer pigments or optically variable liquid crystal pigments or metal or metal oxide pigments . For example, a refractory macrostructure, for example, a lens structure, a diffractive diffraction grid or a hologram, which is preferably covered with a reflective layer, can be shaped as a surface relief. Metallic layers, which reflect incident light, can be provided to withstand optical effects. The decoration layers can be formed differently in areas and be combined together as desired, with the result that, for example, the OVD (Optically Variable Device) areas and the image areas are represented close to each other or overlapping.
    [0022] A separation of the decorative layer from the loading film is not provided for laminating films. A layer that promotes adhesion can therefore be provided between the decorative layer and the carrier film. In addition to one or more layers of decoration, the decorative layer may additionally comprise an adhesive layer. This can be a layer of hot glue or a layer of cold glue. The decoration layers can be formed like the decoration layers of the transfer film.
    [0023] The individual layers of the film structure may consist of thermoplastic material, thermoset material, for example, lacquers, which can be cross-linked by means of UV radiation and hybrid material (thermoplastic, that is, which dries thermally and, at the same time, it is crosslinkable using radiation) or combinations of them.
    [0024] Layer strings can also be present many times. It is also possible that a decorative layer of functional and / or decorative layers is present on both sides of the loading film.
    [0025] In particular, the separating layers, which are preferably wax separating layers, are expected to soften when activated by the action of heat during hot stamping and thus fulfill their separating function, and the layers of metallization that they reduce the strength of the welded joint to a point where two sheets of film cannot be securely joined.
    [0026] Notwithstanding, surprisingly, with the method according to the invention and the device according to the invention, the films can be spliced with great precision using a welded joint, in which a joint part is formed, which does not interrupts production in the roll to roll process.
    [0027] It can be established that the joint joint part is formed as an overlapping joint. The overlapping joint can be formed with a particularly small width, with the result that the films, in which the distance between the patterns in the pattern outline is so small that, if a splicing tape is used, the patterns adjacent to the joining part they would not be able to be printed, they can also be amended.
    [0028] It can also be established that the joint joint part is formed as a top joint that is covered by a splice film. However, the splicing film is not an adhesive tape, with the result that contamination due to the adhesive that emerges cannot occur. The splicing film may also be less than an adhesive tape, in particular, approximately 5 pm to 20 pm thick.
    [0029] It can be established, in addition, that the first and second sheets of film are joined together by means of ultrasonic welding.
    [0030] In an additional modality, it can be established that the first and second layers of films are joined together by means of contact welding. In the case of parts heated by welding by contact of the welding head, they are put in thermal contact with the joining part, such that a local smelting of the two film sheets occurs, which are thus welded together.
    [0031] It is possible to establish that a heated tape or a heated wire is used to form a weld seam.
    [0032] It can be established, in addition, that the first and second blankets of films are joined together by means of laser welding. It is possible to establish that a laser moves along the weld seam and / or the laser light is detected optically such that it forms a line.
    [0033] It is possible to establish that an absorbent layer for the laser light is disposed in the junction part below the first and second sheets of film. The absorbent layer converts the laser light into heat. In particular, it becomes possible to use lower laser outputs. In addition, the absorbent layer makes it possible to introduce the energy acting on the welding point into the welding point also from the rear side, that is, from the side facing away from the laser light. The absorbent layer can be arranged as the topmost layer or under another layer in a decorative layer with multiple layers. It is also possible to use several absorbent layers, optically in different positions in the decorative layer and having several optically different absorbent characteristics for laser light.
    [0034] In an advantageous embodiment, it is possible to establish that a splice film that absorbs laser light is used as an absorbent layer. However, the splicing film is not an adhesive tape, with the result that contamination due to the emersion of the adhesive cannot occur. Advantageously, it can be a dyed film made from the material of the carrier film.
    [0035] The cutting edges of the films can be formed rectilinear. It is also possible to use edges with serrated teeth, perforations of wavy cut, etc.
    [0036] It can be established that a continuous weld seam is formed. In the simplest form, it can be a single or multiple continuous straight seam. The continuous weld seam can also be formed wavy, with serrated or winding teeth. The welding head, for example, the contact welding head, the laser beam or the sonotrode, can be moved over the film surface according to the cited seam contour or a correspondingly shaped welding wire can be supplied .
    [0037] It can be established that a discontinuous weld seam is formed. In particular, broken or stippled weld seams can then be formed, for example, by turning the laser beam on or off, turning the contact welding head or sonotrode on or off, or by lifting it from the film surface. and replace them.
    [0038] It is possible to establish that a weld seam is formed in an oscillating shape. In the case of an oscillating weld seam, the position of the weld seam and / or the width of the weld seam can be varied. For example, the focus of the laser beam can be changed. In addition, it is possible to establish that contact welding heads or sonotrodes with an elongated cross section, for example, a rectangular or elliptical cross section, and rotate or articulate these around their longitudinal geometric axis. The width of the weld seam can be varied in this mode by establishing efficient widths differently from the weld head using the rotating position of the weld head. The efficient width of the welding head then varies between the dimension of the narrow side of the rectangle or ellipse and the dimension of the wide side of the rectangle or ellipse.
    [0039] In an even more advantageous mode, it is possible to establish that the decorative layer is removed in the weld seam area before the welding process. The decorative layer can be removed by making contact with a self-adhesive tape with subsequent detachment of the decorative layers or by transferring it to a lower layer by means of, for example, a 3 mm wide heated print wheel.
    [0040] Before modification, in particular, ablation or thermal destruction, of the decorative layer is also possible through exposure to the laser.
    [0041] It can be established, in addition, that the first and second sheets of film are aligned with each other such that the motifs and / or trademarks arranged on the first film sheet are aligned with the motifs and / or the registered marks arranged on the second film sheet at the registered junction part with a position tolerance less than +/- 0.5 mm. If the subjects have sharp outlines, for example, sharp edges and / or outlines, trademarks are unnecessary.
    [0042] Additional claims are directed at the design of the device.
    [0043] It can be established that the adjustment device is formed in such a way that the movements and / or the registered marks arranged in the first film layer can be aligned with the motifs and / or registered marks arranged in the second film layer in the part of junction registered with a position tolerance less than +/- 0.5 mm or the other way around. The adjustment device may comprise one or more measuring devices and one or more driving devices. The drive devices can, for example, be integrated into the support device. These can be linear motors, in which the support device can comprise a cross table, which is movable in the x and y directions by the linear motors. The measuring device may comprise, for example, an electronic camera and a computer with image processing and recording software.
    [0044] It can be established that at least one welding head is movable perpendicular to the surface of the film sheets.
    [0045] It can be established, in addition, that at least one welding head can be rotated around its longitudinal geometric axis, as described above.
    [0046] It can additionally be established that the at least one welding head can be moved across the surface of the film sheets in the x and / or y direction, in particular, freely. This option can be preferred when the film webs, the width of which is greater than the working width of the welding head, are spliced.
    [0047] The welding head can be formed such that it can generate weld seams with any shape and pattern as well as single and multiple weld seams.
    [0048] It can be established that at least one welding head is formed as an ultrasonic welding head. The welding head may have exchangeable sonotrodes, for example, to be able to form different weld seam geometries.
    [0049] In addition, it is possible to establish that at least one welding head is formed as a contact welding head. A pulsed operation can be provided to prevent extensive heating of the welding head.
    [0050] In an even more advantageous modality, it is possible to establish that at least one welding head is formed as a laser welding head. The welding device may have a specially designed lower layer, in particular, less adhesive (for example, metal, silicone, Teflon, polyamide or the like). A coating, for example, in the form of a silicone coating, for example, disposed between the sonotrode and the surface of the film, is also possible. The welding device may have more devices for cutting and / or fixing the films. Examples are suction devices, clamping and tensioning devices, holding devices or combinations thereof.
    [0051] The invention is now explained in more detail with reference to the modality examples. They are shown in:
    [0052] Figure 1a is a first example of an embodiment of a device for joining two sheets of transfer film or lamination in a schematic side view;
    [0053] Figure 1b is the device in Figure 1a in a schematic top view;
    [0054] Figure 2a are the film sheets of Figure 1a joined together in a schematic perspective representation;
    [0055] Figure 2b are the film webs in Figure 1a joined together in a schematic sectional representation;
    [0056] Figure 3 is a second example of a device for joining two sheets of transfer film and lamination in a schematic perspective representation;
    [0057] Figure 4a is a third example of an embodiment of a device for joining two sheets of transfer film and lamination in a schematic sectional representation;
    [0058] Figure 4b are the film sheets in Figure 4a joined together in a schematic sectional representation;
    [0059] Figure 5a is a first stage of preparation of the film end parts for a fourth example of embodiment, shown in Figure 5c, of a device for joining two sheets of transfer film or laminating in a schematic sectional representation;
    [0060] Figure 5b is a second stage of preparing the end portions of the film in Figure 5a;
    [0061] Figure 5c is a fourth example of an embodiment of a device for joining two sheets of transfer film or lamination in a schematic sectional representation;
    [0062] Figure 5d are the film sheets of Figure 5c joined together in a schematic sectional representation;
    [0063] Figure 6a is a fifth example of a device for joining two sheets of transfer film or lamination in a schematic sectional representation;
    [0064] Figure 6b are the film sheets in Figure 6a joined together in a schematic sectional representation;
    [0065] Figure 7a is a sixth example of an embodiment of a device for joining two sheets of transfer film or lamination in a schematic sectional representation;
    [0066] Figure 7b are the film webs in Figure 7a joined together in a schematic sectional representation;
    [0067] Figure 8 are the end parts of the film welded together in the layer structure in a schematic sectional representation;
    [0068] Figure 9a is a sectional view of a welded film joint enlarged 10 times;
    [0069] Figure 9b is a sectional view of a welded joint of film enlarged 20 times.
    [0070] Figures 1a and 1b show a device 1 for joining or splicing two sheets of transfer film or lamination 2 and 2 'by means of ultrasonic welding in a schematic representation. In the embodiment example shown in Figures 1a and 1b the films are transfer films formed as hot stamping films.
    [0071] The film webs with tape format 2 and 2 'are supplied in feeder rolls 2v and supplied to the support devices 4 and 4' that fix the end parts of the film webs. The film sheets are present as film spools which, in device 1, are joined to form larger film spools. The films are multi-layered bodies comprising a thermoplastic loading film and a decorative layer that can be detached from the loading film and is formed as a transfer film. The films may have more layers, for example, a separator layer disposed between the loading film and the transfer film which makes it easier to detach the transfer layer from the loading film. Reflective and protective layers can additionally be provided, as described further below in Figure 8.
    [0072] The support device 4 is immovably connected to an adjustment device 4j. The support device 4 is adjustable in the x and y direction by means of the adjustment devices 4j, whereby the positions of the two film webs 2 and 2 'can be adjusted with respect to each other. With the adjustment device 4j the two film sheets 2 and 2 'can be aligned with each other such that the motifs and / or trademarks arranged on the first film mat 2 are aligned with the motifs and / or trademarks arranged on the second mat of film 2 'recorded with a position tolerance less than +/- 0.5 mm and form an overlapping joint 3, in which they are arranged on top of each other. In the overlapping joint 3, the film webs 2 and 2 'extend in a fixed contact 5, which is disposed below an ultrasonic welding head 6. Ultrasonic welding head 6 comprises an ultrasonic transducer 6w, an amplitude transformer 6a and a 6s sonotrode.
    [0073] A high frequency alternating current is transmitted to the 6w ultrasonic transducer from which a mechanical ultrasonic oscillation is generated with the help of the piezoelectric or magnetostrictive effect. The ultrasonic oscillation is transmitted to the sonotrode 6s through the amplitude transformer 6a. The amplitude of the ultrasonic oscillation and the impedance compatibility are influenced by the shape and mass of the amplitude transformer 6a. The 6s sonotrode can be produced from steel, aluminum or titanium.
    [0074] In the example of the modality represented in Figures 1a and 1b, the sonotrode 6s has two spaced ends. When lowering the ultrasonic welding head 6, the two ends of the sonotrode 6s rest on the film mat 2 extending on top of the overlapping joint 3 and transmit the ultrasonic oscillations to the film material. The fixed contact 5 forms a counter-bearing for the sonotrode 6s. The ultrasonic oscillations are then transmitted under pressure to the film sheets 2 and 2 'to be joined, which are arranged on top of each other in the overlapping joint 3 in the fixed contact 5. The areas of the film sheets 2 and 2 'are are in contact with the sonotrode 6s heat as a result of the internal friction caused by the ultrasound and fuse.
    [0075] The lowered ultrasonic welding head 6 can be moved through the longitudinal geometric axis of the film blankets 2 and 2 'such that a double seam can be produced from two parallel welding seams 3n due to the two ends of the sonotrode 6s (see Figures 2a and 2b), whose seams extend over the entire width of the film sheets 2 and 2 '.
    [0076] It has been surprisingly shown that a durable and elastic welded joint occurs even though the additional layers mentioned above are arranged between the two carrier films in the overlapping joint 3 such that the two carrier films are not in direct contact. It was expected that the wax, in particular, would act as a means of separation also during ultrasonic welding by melting as a result of energy input and would prevent a durable welded joint. Further down in Figure 8, a possible mechanism of action is described, which leads to the elastic welded joint.
    [0077] Figures 2a and 2b show the film webs in Figure 1 joined together in a schematic perspective representation and in a schematic sectional representation, respectively. The film webs 2 and 2 'are joined together by a double seam, formed by two 3n weld seams.
    [0078] As an alternative to double stitching made of two parallel and straight single seams, other double stitches can also be made if the ultrasonic welding head 6 is rotatable around its longitudinal geometric axis (geometric axis z, which corresponds to direction of lowering). The two ends of the sonotrode 6s can therefore also be rotated during the straight movement of the ultrasonic welding head 6 through the longitudinal geometric axis or the direction of travel of the film sheets 2 and 2 ', such that an oscillating double seam is formed of two unique non-straight and parallel seams. Depending on the value of the movement and the speed of rotation, the resulting shape, in particular complex, specifically also the density of the cross connection seams, that is, their respective distance from one another, can be controlled. The oscillating double seam can, in particular, have a guilloche-like shape. Such closed packaged double seam may have increased resistance, in particular, against tensile forces during processing and / or during rewinding of the 2, 2 'film webs. It is also possible to equip the sonotrode with more than two ends, with the result that either multiple parallel and straight seams or, as described above, multiple correspondingly even more complex non-straight seams are formed.
    [0079] It is also possible to combine the multiple seams with the previously described width variations in the seam and / or the interruptions in the seam.
    [0080] Figure 3 shows a second example of device 1, in which sonotrode 6s is formed as a rotating sonotrode and fixed contact 5 as a rotating fixed contact. The representation of the device in Figure 3, which is essentially formed like the device in Figure 1, is limited to the sonotrode and fixed contact to simplify the representation.
    [0081] Figure 4a shows a schematic cut section of a third example of the embodiment of device 1, which is essentially formed like the device in Figure 1. The two parts of the film 2 and 2 'directly support each other forming a butt joint and are covered in the joint by a splice 7. Like the loader film of the two film sheets, splice 7 may consist of a thermoplastic material. It can, for example, be supplied to device 1 as a tape which is cut to the width of the film webs after welding. As shown in Figure 4b, a double seam can be provided, which is formed from two 3n weld seams. The advantage of this example of the modality is that the two weld seams 3n are formed directly between the thermoplastic materials that can be welded together, with the result that the weld seams are formed with optimum tensile strength.
    [0082] Figures 5a to 5d show an embodiment in which the end parts of the film sheets 2 and 2 'are each flexed or bent by 90 ° and then form a fold part 2f or 2f'. The increased strength thus occurs at one of the 3n weld seams because the loading films of the two film webs extend on top of each other as a result of folding over the folding part and the loading films engage or interlock against the direction of a subsequent traction load.
    [0083] Figures 6a and 6b show an example of an additional modality in which contact welding is provided as the joining process. Instead of the ultrasonic welding head in Figure 1, a contact welding head 8 is provided that, on the bottom side facing the overlapping joint, has two heating elements with wire or ribbon format 8h spaced apart which, when the contact welding head 8 is lowered into the film sheets 2 and 2 'to be joined, forming two weld seams 3n by means of the local thermal melting of the loader films. Mixed layers also form at the weld seams, as described further below in Figure 8.
    [0084] Figures 7a and 7b show an example of the additional embodiment in which the film webs 2 and 2 'are joined together by means of laser welding. In the example of the modality two laser welding heads 9 spaced apart from each other are provided, which allow the sheets of film 2 and 2 'to be joined to be heated in a linear manner. For this purpose, laser welding heads 9 can be formed to be displaceable along the geometric axis of sewing or non-displaceable laser welding heads with an optical beam deflection can be provided. The upper side of the support device facing the laser welding heads 9 is formed transparent to the laser radiation used. The two film webs 2 and 2 'form a top-down joint, of which an absorbent layer 10 for laser radiation formed as a black splicing film is arranged. The fixed contact 5 is arranged below the splicing film. The two film webs 2 and 2 'are advantageously aligned, such that the loader film extends on the splicing film.
    [0085] If the contact welding head 8 is equipped with two or more heating elements 8h or the laser welding head 9 is equipped with two or more laser beams, the generation of multiple complex seams, in particular, oscillating , with increased resistance can also be produced by rotating the contact welding head 8 around its longitudinal geometry axis or in the case of laser welding head 9 by turning the laser welding head 9 around its longitudinal geometric axis or by adjusting the optical beam deflection accordingly. It is also possible, at present, to combine the multiple seams with the previously described width variations of the seam and / or the seam interruptions.
    [0086] With reference to a schematic sectional representation, Figure 8 shows the layer structure of two film webs 2 and 2 'welded together and the formation of the 3n weld seams in detail.
    [0087] The two film blankets 2 and 2 'are formed as bodies with multiple layers. A wax separating layer 22, a transfer layer 23 and a metallic reflective layer in particular 24 are arranged in a carrier film 21, which can be formed, for example, of polyester, in particular PET (PET = polyethylene terephthalate ). The reflective layer can, for example, be formed from metals such as aluminum, copper, chromium or HRI layers (HRI = high refractive index), such as ZnS or TIOO2, or from a multilayer system over the entire surface or textured, for example, by metallization or partial demetallization. Combinations of these are equally possible. An adhesive layer can be provided, for example, as an additional layer.
    [0088] As the tests showed, the mixed structures are formed at the 3n weld seams, in which the carrier films 21 form a continuous joining layer in which the remaining layer clusters are incorporated. As Figures 9a and 9b show, the strata have become mixed. Although the mixed layer is not as homogeneous as the carrier film, it still has sufficient tensile strength to enable the film to be stamped or laminated, as described above.
    [0089] As experiments with different welding processes showed, even though the tensile strength of a conventional seam is not achieved, the minimum demand to be placed on a seam, of a tensile strength of more than 13 N / cm , is achieved. The tensile strength was, in each case, determined using a Zwick testing machine.
    [0090] The following tensile strengths were found for an ultrasonic welded joint for films made of PET with a seam width of 0.8 mm depending on the thickness of the material: -PET 19 pm: 21.5 N / cm -PET 50 pm: 47.0 N / cm
    [0091] With a thickness of 19 pm the starting material has a tensile strength of 40 to 45 N / cm.
    [0092] Conventional adhesive coated tape has a tensile strength of 30 to 40 N / cm. With a conventional splice and a 19 pm thick PET film, a tensile strength of 35 to 45 N / cm is achieved.
    [0093] The splicing of the aforementioned PET material welded according to the invention had a tensile strength of 15 to 25 N / cm, which is sufficient for the further processing of the film webs joined in a roll to roll process.
    [0094] In an additional experiment, the film mats of a hot stamping film were joined by ultrasonic welding with a seam width of 0.6 to 1.0 mm, where the tensile strength by seam was 12 to 19 N / cm.
    [0095] With a hot stamping film with pigmented adhesive, a tensile strength of only 3.0 N / cm per seam was achieved for the same seam width from 0.6 to 1.0 mm.
    [0096] More experiments were carried out to determine the influence of the seam width and the welding process: - ultrasonic welding (0.5 mm seam): 4.1 N / cm - ultrasonic welding (1 mm seam) : 8.5 N / cm - impulse welding or contact welding (1.6 mm seam): 12.8 N / cm
    [0097] Clearly, the width of the weld seam has a decisive influence on the tensile strength of the weld seam.
    [0098] The following demands were placed on the joint between the two sheets of film 2 and 2 '.
    [0099] As has been shown further, the following results could be achieved when the film wrapping sheets of a hot stamping film with a total thickness of approximately 19 pm: -the production of a joint was recorded with a tolerance of + / -0.5 mm; -the maximum joint width of 3 mm; -the application of the joint, that is, the thickness of the joint was not greater than when formed using the splicing tape; -the adhesion was so good that the film could withstand the tensile forces that appear in a typical application machine; -the length of the joint: in the range of 10 to 650 mm. NUMERICAL REFERENCE LIST 1 device for joining parts of film 2, 2 'film sheets 2f, 2f' film sheet 2v feed roll 3 overlapping joint 3n weld seam 4, 4 'support device 5 fixed contact 6 welding head ultrasonic 6th amplitude transformer 6s sonotrode 6w ultrasonic transducer 7 splice film 8 contact welding head 8h heating element 9 laser welding head 10 absorbent layer 21 loader film 22 separator layer 23 transfer layer 24 metal layer
    权利要求:
    Claims (15)
    [0001]
    1. Method for joining a first and second film sheets (2, 2 ') of a transfer film, wherein the film sheets (2, 2') comprise a thermoplastic loading film (21) and a decorative layer (23 ), characterized by the fact that: such a first and second film blankets (2, 2 ') are joined together which have a separating layer in order to make it easier to detach the decorative layer (23) of the thermoplastic loading film ( 21) a joint joint part (3) is formed between the first and second film webs (2, 2 '), wherein the first and second film webs (2, 2') are joined together by a process of welding in such a way that the first and second sheets of film (2, 2 ') are joined together by a double seam, formed by two weld seams (3n).
    [0002]
    2. Method according to claim 1, characterized by the fact that: the joint joint part is formed as an overlapping joint (3).
    [0003]
    3. Method according to claim 1, characterized by the fact that: the joint joint part is formed as a top joint which is covered by a splice film.
    [0004]
    4. Method according to any one of the preceding claims, characterized by the fact that: the first and second film mats (2, 2 ') are joined together by means of ultrasonic welding.
    [0005]
    Method according to any one of claims 1 to 3, characterized in that: the first and second sheets of film (2, 2 ') are joined together by means of contact welding.
    [0006]
    6. Method, according to claim 5, characterized by the fact that: an electric heating element (8h) is used to form a weld seam.
    [0007]
    Method according to any one of claims 1 to 3, characterized in that: the first and second film webs (2, 2 ') are joined together by means of laser welding.
    [0008]
    Method according to claim 7, characterized by the fact that: an absorbent layer (10) for laser light is arranged at the junction part below the first and second film sheets (2, 2 ').
    [0009]
    9. Method according to claim 8, characterized by the fact that: a splicing film that absorbs laser light is used as an absorbent layer (10.)
    [0010]
    10. Method according to any one of the preceding claims, characterized by the fact that: a continuous weld seam is formed.
    [0011]
    11. Method according to any one of claims 1 to 9, characterized in that: a discontinuous weld seam is formed.
    [0012]
    12. Method according to any of the preceding claims, characterized by the fact that: a weld seam is formed in an oscillating shape.
    [0013]
    13. Method according to any one of the preceding claims, characterized by the fact that: the first and second sheets of film (2, 2 ') are aligned with each other such that the motifs and / or trademarks arranged on the first sheet of film (2) are aligned with the motifs and / or trademarks arranged on the second film mat (2 ') on the joining part (3) registered with a position tolerance better than +/- 0.5 mm.
    [0014]
    14. Method according to any one of the preceding claims, characterized in that: the decorative layer (23) is removed locally in the area of the weld seam before the weld seam is formed.
    [0015]
    15. Method according to any one of the preceding claims, characterized by the fact that: such a first and second film webs (2, 2 ') are joined together, the webs of which have an adhesive layer.
    类似技术:
    公开号 | 公开日 | 专利标题
    BR112014004633B1|2020-07-28|method for joining transfer film or laminating blankets
    JP2014526398A5|2015-09-17|
    JP5370154B2|2013-12-18|Antenna sheet, transponder and booklet
    BR112012031765B1|2021-02-09|sheet laminate intermediate assembly, sheet laminate production method and weft laminate intermediate assemblies
    US20070228207A1|2007-10-04|Anisotropic Conductive Film Carrying Tape and Packaging Method
    CN104302721B|2017-12-19|The method and apparatus for connecting the first film web and the second film web
    BRPI0714183A2|2012-12-25|Method for producing an information page and information page
    US5714290A|1998-02-03|Flexible belts having a bent seam
    JP2013506492A|2013-02-28|Attaching the grip tab to the carrier layer of film coating
    US20020079049A1|2002-06-27|Fabrication method for an electrostatographic member having a virtual flexible seamless substrate |
    US20020074520A1|2002-06-20|Substantially seamless electrostatographic member fabrication apparatus
    JP2009154427A|2009-07-16|Connected structure of laminated film and connection method
    US20020074082A1|2002-06-20|Fabrication method for an electrostatographic member having a virtual flexible seamless substrate |
    JPH0822632B2|1996-03-06|Laminated plastic card
    JP2019172276A|2019-10-10|Heat seal film, packaging material and manufacturing method of packaging material
    JP2019181806A|2019-10-24|Manufacturing method of sleeve plate for laser engraving
    CA2392139A1|2001-06-21|Protective pocket and method of making a protective pocket
    JP4391902B2|2009-12-24|Laminate for making card holder
    JP2019534812A|2019-12-05|Laser welding system and method for generating an imaged weld seam
    JP4585297B2|2010-11-24|thread
    JP4940902B2|2012-05-30|Cassette for printing
    JP6101560B2|2017-03-22|Adhesive sheet and method for producing adhesive sheet
    JP4905065B2|2012-03-28|Printing tape
    JP4905062B2|2012-03-28|Cassette for printing
    JP2008265786A|2008-11-06|Packaging bag with ic tag
    同族专利:
    公开号 | 公开日
    TR201902068T4|2019-03-21|
    EP2750864B1|2018-12-12|
    CN103842154B|2017-06-16|
    RU2014112354A|2015-10-10|
    MX350755B|2017-09-18|
    US9782927B2|2017-10-10|
    JP6090324B2|2017-03-08|
    WO2013029901A1|2013-03-07|
    MX2014002189A|2014-05-30|
    DE102011111786A1|2013-03-07|
    RU2606648C2|2017-01-10|
    EP2750864A1|2014-07-09|
    BR112014004633A2|2017-03-14|
    US20140311654A1|2014-10-23|
    CN103842154A|2014-06-04|
    JP2014526398A|2014-10-06|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3278149A|1965-02-19|1966-10-11|Aluminum Co Of America|Shelving assembly|
    JPS4420877Y1|1966-03-01|1969-09-05|
    US4259399A|1978-08-31|1981-03-31|Burlington Industries, Inc.|Ultrasonic nonwoven bonding|
    DE3524964A1|1985-07-12|1987-01-22|Grecon Greten Gmbh & Co Kg|Process for joining an end of a film web to the start of a film web|
    JPH05246592A|1992-03-02|1993-09-24|Yamakawa Kako:Kk|Film feeding device|
    US5827384A|1997-07-18|1998-10-27|The Procter & Gamble Company|Process for bonding webs|
    JP3204171B2|1997-07-31|2001-09-04|ブラザー工業株式会社|Ultrasonic welding fusing equipment|
    CA2337220C|1998-07-10|2005-07-05|Edison Welding Institute|Simultaneous butt and lap joints|
    JP2000159400A|1998-11-24|2000-06-13|Ykk Corp|Tape end positioning device for tape end joiner|
    JP2000272013A|1999-03-23|2000-10-03|Shin Etsu Polymer Co Ltd|Method for connecting plastic sheet material|
    CA2372216A1|1999-04-30|2000-11-09|Melih Ogmen|Method of clamping thermoplastic pieces and heat control for laser welding|
    JP2001001365A|1999-06-22|2001-01-09|Dainippon Printing Co Ltd|Sheet unwinding feed apparatus for injection molding inmold decoration|
    FR2799222B1|1999-09-30|2003-03-07|Newmat Sa|PRINTED WELDABLE FLEXIBLE POLYMER MATERIAL FOR MAKING TENSIONED STRUCTURES, STRUCTURES OBTAINED WITH SUCH MATERIAL AND METHOD FOR PRODUCING SUCH STRUCTURES|
    JP2001158047A|1999-12-03|2001-06-12|Panac Co Ltd|Method for ultrasonically welding and bonding synthetic resin film|
    JP4603122B2|2000-02-23|2010-12-22|四国化工機株式会社|Ultrasonic sealing device|
    PT1184311E|2000-08-31|2005-02-28|Tetra Laval Holdings & Finance|METHOD FOR JOINING LAMINATED MATERIAL FOR PACKAGING FLUID FOOD PRODUCTS|
    DE10226148B4|2002-06-13|2011-11-17|Tetra Laval Holdings & Finance S.A.|Device for bonding two packaging material webs|
    JP2004043072A|2002-07-10|2004-02-12|Tokyo Autom Mach Works Ltd|Film splicing device|
    JP2004256268A|2003-02-27|2004-09-16|Toppan Printing Co Ltd|Connecting method of web material|
    US7645353B2|2003-12-23|2010-01-12|Kimberly-Clark Worldwide, Inc.|Ultrasonically laminated multi-ply fabrics|
    JP4420877B2|2005-09-22|2010-02-24|シャープ株式会社|Image processing method, image processing apparatus, and image output apparatus|
    JP5008964B2|2006-12-21|2012-08-22|芝浦メカトロニクス株式会社|ACF tape bonding apparatus, ACF tape bonding apparatus, and ACF tape bonding method|
    DE102007038578A1|2007-08-16|2009-02-19|Evonik Degussa Gmbh|Method of decorating surfaces|
    JP5342286B2|2008-05-16|2013-11-13|日東電工株式会社|Manufacturing method of sheet joined body and sheet joined body|
    CN101407112A|2008-11-24|2009-04-15|四川蒙特工程建设有限公司|Plastic film welding device|
    IT1392809B1|2009-02-04|2012-03-23|Goglio Spa|METHOD AND EQUIPMENT TO PERFORM HEAD JOINTS OF A THERMAL-HEATING AND LAMINATED FLEXIBLE LAMINATE SO IT HAS OBTAINED|
    IT1393913B1|2009-05-05|2012-05-17|Rent Srl|GROUP AND PROCEDURE FOR FEEDING MATERIAL COILS IN SHEET, IN PARTICULAR BUT NOT ONLY THE PRINTED PLASTIC FILM WITH POSITION REFERENCES FOR AUTOMATIC PACKAGING MACHINES|
    EP2305452A1|2009-10-02|2011-04-06|Kirson Industrial Reinforcements GmbH|Method for joining coated textiles, joint points and use of a device to carry out the method|DE102013214553A1|2013-07-25|2015-01-29|Bayerische Motoren Werke Aktiengesellschaft|Method for sealing a side region of a film stack, film stack and laminated glass pane|
    EP2873517B1|2013-11-14|2019-04-24|Airbus Defence and Space GmbH|Stabilising device, stabilising process and method for producing fibre compound components|
    US9925616B2|2013-12-23|2018-03-27|Samsung Display Co., Ltd.|Method for fusing nanowire junctions in conductive films|
    EP3142951B1|2014-05-12|2020-01-01|Tetra Laval Holdings & Finance S.A.|Device and method for splicing|
    KR101602815B1|2014-07-28|2016-03-21|신화인터텍 주식회사|Soft mold for optical film and method of fabricating the same|
    FR3033515B1|2015-03-12|2017-11-24|Spoolex|ULTRASOUND PERFECTION LAMINATING METHOD OF A THERMOFUSIBLE ARTICLE, AND ROLLING DEVICE FOR CARRYING OUT SAID METHOD|
    EP3081515B1|2015-03-19|2019-05-08|Domenico Reviati|Method and system for continuous change of reels made of corrugated cardboard, supplying packaging machines and packaging machine comprising such a system|
    US10351377B2|2015-08-03|2019-07-16|Elsner Engineering Works, Inc.|Ultrasonic roll tail closure of non-woven web material method and apparatus|
    FR3041950B1|2015-10-01|2020-02-21|C.E.R.M.E.X. Constructions Etudes Et Recherches De Materiels Pour L'emballage D'expedition|FEEDING FOR WRAPPING|
    TW201726428A|2015-11-03|2017-08-01|Leonhard Kurz Stiftung & Co Kg|Method and application device for applying a transfer layer of a film to a substrate|
    JP6715928B2|2016-07-01|2020-07-01|エステー産業株式会社|Sheet welding equipment|
    CN108687442B|2017-03-30|2021-10-01|法拉第未来公司|System and method for welding|
    JP6842669B2|2017-05-29|2021-03-17|トヨタ紡織株式会社|Particle impregnation device and manufacturing method of particle impregnated non-woven fabric|
    US10071439B1|2017-09-27|2018-09-11|Spirit Aerosystems, Inc.|Method and system of joining thick sheets of non-weldable material using ultrasonic joining|
    US10413993B2|2017-09-27|2019-09-17|Spirit Aerosystems, Inc.|Method and system of joining thick sheets of non-weldable material using ultrasonic joining|
    US11198249B2|2018-07-30|2021-12-14|General Electric Company|Method of joining additively manufactured components|
    DE102018130674B4|2018-12-03|2021-12-23|Bundesdruckerei Gmbh|Method and device for splicing a first and a second composite film|
    JP6574911B1|2019-01-16|2019-09-11|大成ラミック株式会社|Joint tape, packaging film coupling method and coupling apparatus using the same|
    CN110315684B|2019-08-13|2021-06-01|东莞市艾尔玛科技有限公司|Foil feeder for in-mold transfer printing process|
    KR102223220B1|2019-11-05|2021-03-05|동양산기|Continuous feeder of foam sheet|
    CN112223759A|2020-10-09|2021-01-15|天津长鑫亿讯科技有限责任公司|Preparation method of plastic film|
    法律状态:
    2018-03-27| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-09-17| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-05-26| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2020-07-28| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 31/07/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    2021-06-01| B21F| Lapse acc. art. 78, item iv - on non-payment of the annual fees in time|Free format text: REFERENTE A 9A ANUIDADE. |
    2021-09-21| B24J| Lapse because of non-payment of annual fees (definitively: art 78 iv lpi, resolution 113/2013 art. 12)|Free format text: EM VIRTUDE DA EXTINCAO PUBLICADA NA RPI 2630 DE 01-06-2021 E CONSIDERANDO AUSENCIA DE MANIFESTACAO DENTRO DOS PRAZOS LEGAIS, INFORMO QUE CABE SER MANTIDA A EXTINCAO DA PATENTE E SEUS CERTIFICADOS, CONFORME O DISPOSTO NO ARTIGO 12, DA RESOLUCAO 113/2013. |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102011111786A|DE102011111786A1|2011-09-01|2011-09-01|Method and apparatus for joining transfer or laminating film webs|
    DE102011111786.9|2011-09-01|
    PCT/EP2012/064913|WO2013029901A1|2011-09-01|2012-07-31|Method and device for joining transfer or laminating film webs|
    [返回顶部]