JP2012158020A - Method and device of laminating woven fabric by gravure print film, and bag using the woven fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of laminating a woven fabric by a gravure print film which can laminate the woven fabric by the gravure print film, can exhibit excellent bonding strength, and can withstand sewing processing.SOLUTION: A resin pressure-bonding process 100 is set wherein thermoplastic polyurethane resin is thermally compressed on a texture of the woven fabric through a pressure-sensitive adhesive. A film superposing process 200 is set wherein a gravure-printed rolled film is superposed on a side of the thermoplastic polyurethane resin with the woven fabric bonded thereon through the pressure-sensitive adhesive. A bonding process 300 is set wherein the superposed woven fabric and the rolled film are thermally compressed. A cooling process 400 is set wherein the rolled film which is pressure-bonded on the woven fabric is cooled. Through these processes, lamination by the gravure print film is carried out on the woven fabric.

Description

  The present invention relates to a method and apparatus for laminating a woven fabric with a gravure printing film capable of laminating a stretched film subjected to gravure printing onto a woven fabric as a bag base material, for example, and a bag using the woven fabric. .

  There are the following means for applying color photographic printing to a woven fabric. First, a means for attaching woven fabrics one by one with a weak adhesive to a threading base of an offset printing machine and printing on the woven fabric. Secondly, a means for performing offset printing on the transfer paper, attaching the transfer paper to the woven fabric one by one, and transferring it by thermocompression bonding. Third, means for performing gravure rotary printing on the transfer paper, attaching the transfer paper to the woven fabric one by one, and transferring it by thermocompression. Fourthly, there is a means for directly silk-printing the woven fabric.

  Patent Document 1 describes means for laminating a moisture permeable and waterproof film mainly composed of polyurethane resin on one side of a fabric body and directly printing a predetermined pattern on the film. As the printing means used in Patent Document 1, a means for directly applying and drying a pattern printing composition with a gravure roll, a rotary screen, a flat screen or the like is selected.

  On the other hand, as a means for laminating a synthetic resin film used for gravure printing on a substrate, there are a dry laminating method and an extrusion laminating method. Dry laminating is a processing method in which a synthetic resin film and a substrate are bonded together using an adhesive. On the other hand, the extrusion laminating method is a means for covering and pressing a stretched synthetic resin film obtained by extruding a raw material resin with an extruder on the surface of a base material, cooling it, and winding it around a winding part.

  Patent Document 2 describes a laminated sheet using an extrusion lamination method and a bag place using the laminated sheet. In this laminated sheet, a laminate layer made of a composition of an ethylene-α, β-unsaturated carboxylic acid alkyl ester copolymer and a thermoplastic elastomer is provided on at least one side of a woven fabric made of drawn yarn made of thermoplastic resin. Thus, it is a laminated sheet used for bags.

JP 2010-255132 A JP 2001-293807 A

  In the first means in the method of performing color photographic printing on the woven fabric, the cloth is soft, and the work of attaching the cloth one by one to the threading table becomes a burden. In the second and third means, the transfer paper is expensive and the workability is poor, so that the overall cost is high. According to the fourth means, silk printing is rough and has a drawback of lacking in clarity and realism. In addition, as in Patent Document 1, when a pattern printing composition is directly applied to a moisture permeable and waterproof film mainly composed of a polyurethane resin, clear printing such as gravure printing is impossible.

  On the other hand, when a stretched synthetic resin film used for a gravure printing film is directly laminated on a woven fabric, a phenomenon occurs in which the surface of the woven fabric is hardened by the hardness of the film. Therefore, when this woven fabric is bent or folded, wrinkles are generated. In addition, since the wrinkles do not return to the original state, it is impossible to perform operations such as sewing using a woven fabric obtained by directly laminating a film.

  In addition, when a stretched synthetic resin film subjected to gravure printing is laminated on a woven fabric, the adhesive strength cannot be obtained, the surface is wrinkled or broken, and further, there is a problem that tension curl or the like is also generated.

  That is, since the woven fabric is woven by a loom, the woven fabric is not smooth. Therefore, when a stretched film is laminated on a woven fabric, an air layer is generated between the stretched film and the fabric, and wrinkles are generated when passing through a laminating roll in the process. In addition, since only the creased portion of the woven fabric is adhered, the adhesive strength cannot be maintained, and there is a problem that the fabric is easily peeled off. As an alternative, a product obtained by laminating a stretched film obtained by applying gravure printing to a nonwoven fabric is provided. However, this nonwoven fabric has a disadvantage that it gives a cheap impression because it has a lower strength than a woven fabric and has a hard and smooth printed surface.

  In addition, in extrusion lamination, the machine speed is high, and it is difficult to adjust the tension of the woven fabric or stretched synthetic resin film as a base material, and therefore, the adhesive strength varies. Furthermore, when a stretched film is laminated on a woven fabric, curling due to the tension of the stretched film itself is likely to occur, so that production loss frequently occurs, such as the woven fabric being curled up and not usable.

  Further, in the case where a laminate layer is provided on at least one side of the woven fabric as in the bag described in Patent Document 2, even if the adhesiveness and flexibility of the laminate layer are improved, the mesh of the woven fabric is formed in the laminate layer. It will be thickly covered. For this reason, it is possible to impart a texture of artificial leather by applying a texture to the surface of the laminate layer, but it is not possible to leave a high-quality texture that makes use of the mesh of the woven fabric. For these reasons, no gravure-printed stretched film laminated with woven fabric has been provided today.

  Therefore, the present invention has been created to solve the above-mentioned problems, and it is possible to laminate a woven fabric with a gravure printing film, to obtain a soft and wrinkle-free finish that has excellent adhesive strength and can withstand sewing processing. An object of the present invention is to provide a method and apparatus for laminating a woven fabric with a gravure printing film and a bag using the woven fabric.

  In order to achieve the above-mentioned object, the first means in the present invention includes a resin pressure bonding step 100 for thermocompression bonding the thermoplastic polyurethane resin 3 to the weave of the woven fabric 1 through the pressure sensitive adhesive 2, and the woven fabric 1 A film polymerization step 200 in which a stretched film 5 on which gravure printing is applied via a pressure sensitive adhesive 4 is overlapped with a thermoplastic polyurethane resin 3 bonded to each other, and the polymerized woven fabric 1 and the stretched film 5 are thermocompression bonded. The laminating method includes a bonding step 300 for performing cooling, and a cooling step 400 for cooling the stretched film 5 that is pressure-bonded to the woven fabric 1.

  The second means is a laminating method in which the temperature at which the woven fabric 1 and the stretched film 5 are thermocompression bonded in the bonding step 300 is set to 60 degrees or less.

The third means is to apply thermocompression by superposing the woven fabric sheet 1A on the surface of the TPU film 3A on which the pressure-sensitive adhesive 2 is applied and the coating roll 10 for applying the pressure-sensitive adhesive 2 to the TPU film 3A. A base forming mechanism A including a thermocompression-bonding roll 20 and a cooling roll 30 for cooling the TPU film 3A thermocompression-bonded by the thermocompression-bonding roll 20,
An application roll 50 for applying the pressure-sensitive adhesive 4 to the stretched film 5 subjected to gravure printing, and the TPU film 3A of the woven fabric sheet 1A on the surface of the stretched film 5 on which the pressure-sensitive adhesive 4 is applied. Laminating apparatus comprising a printing surface forming mechanism B comprising a thermocompression-bonding roll 60 for superposing and bonding the bonded surfaces and thermocompression bonding, and a cooling roll 70 for cooling the stretched film 5 thermocompression-bonded to the woven fabric sheet 1A. It is.

  In a fourth means, the coating roll 10 is a laminating apparatus in which a mesh sheet 11 for adhering the pressure sensitive adhesive 2 to the TPU film 3A is provided on the surface of the coating roll 10.

  5th means WHEREIN: The said thermocompression-bonding rolls 20 and 60 are in the laminating apparatus which stored the oil for heat conduction inside, and affixed the PTFE cloth 21 for peeling on the surface.

  The sixth means is provided with a wrinkle removing roll 40 that contacts the both surfaces of the woven fabric sheet 1A to be sent to the thermocompression-bonding roll 20 in the base forming mechanism A and removes wrinkles of the woven fabric sheet 1A, thereby forming the printing surface. The laminating apparatus is provided with a wrinkle removing roll 80 that comes into contact with both surfaces of the woven fabric sheet 1A to be sent to the thermocompression-bonding roll 60 in the mechanism B and takes a wrinkle of the woven fabric sheet 1A.

  The seventh means is configured such that the base forming mechanism A and the printing surface forming mechanism B are shared and used separately for each process.

  The eighth means is to form the bag base P by superposing the gravure-printed stretched film 5 on the woven fabric 1 to which the thermoplastic polyurethane resin 3 is thermocompression bonded through the pressure sensitive adhesive 2 through the weave. Then, a means for solving the problem is to form a bag formed by sewing the bag base material P.

  According to the manufacturing method of Claim 1 and Claim 2, it became possible to laminate the stretched film 5 which gave the gravure printing to the woven fabric 1. FIG. Moreover, it is excellent in adhesive strength and can be finished in a soft and wrinkle-free finish that can withstand sewing. In particular, since the finish of the woven fabric 1 can be made without damaging the value of the woven fabric 1, a high-class feeling that cannot be obtained with a non-woven fabric is provided.

  Moreover, according to the manufacturing apparatus of Claim 3 thru | or 7, while the operation | work which laminates the stretched film 5 which gave the gravure printing to the woven fabric 1 was rationalized, the manufacturing loss became very small.

  Furthermore, the bag according to claim 8 is excellent in adhesive strength, has a softness that can withstand sewing, and has a printed surface that does not wrinkle.

It is the schematic which shows one Example of the foundation | substrate formation mechanism of this invention. It is sectional drawing which shows the woven fabric formed with the foundation | substrate formation mechanism of this invention. It is the schematic which shows one Example of the printing surface formation mechanism of this invention. It is sectional drawing which shows the woven fabric formed with the printing surface formation mechanism of this invention. It is a perspective view which shows one Example of the thermocompression-bonding roll of this invention. It is a perspective view which shows one Example of the roll for application | coating of this invention. It is a perspective view which shows one Example of the wrinkle removal roll of this invention. It is a perspective view which shows one Example of the bag formed in this invention. It is process drawing which shows this invention manufacturing method.

  According to the present invention, the woven fabric can be laminated with a gravure printing film, and the original purpose of achieving a soft and wrinkle-free finish that has excellent adhesive strength and can withstand sewing is achieved. .

  In the present invention, for example, a stretched film 5 subjected to gravure printing is laminated on a woven fabric 1 that becomes a bag base material P.

  The manufacturing method of the present invention is performed in a resin pressure bonding process 100, a film polymerization process 200, an adhesion process 300, and a cooling process 400 (see FIG. 9). These steps are performed by the apparatus of the present invention comprising the base forming mechanism A shown in FIG. 1 and the printing surface forming mechanism B shown in FIG.

  The resin press-bonding process 100 is a process in which the flexibility that varies depending on the type of the woven fabric 1 is regulated, and the thermoplastic polyurethane resin 3 is thermo-compressed to the weave of the woven fabric 1 via the pressure-sensitive adhesive 2. . The woven fabric 1 is a fiber base material and is different from a non-woven fabric. For example, a woven fabric 1 made of fibers such as cotton, hemp, wool, silk, or a woven fabric 1 made of fibers of nylon, polyester, acrylic, vinylon, polyurethane, or the like is used. In the examples, a woven fabric sheet 1A made of 420 denier polyester fibers was used.

  This resin press bonding step 100 is performed by the base formation mechanism A of the apparatus of the present invention (see FIG. 1). That is, the pressure-sensitive adhesive 2 is applied to the thermoplastic polyurethane resin film 3 </ b> A (hereinafter referred to as a TPU film 3 </ b> A) with the application roll 10. The coating roll 10 used at this time is provided with a mesh sheet 11 on the surface, and the pressure sensitive adhesive 2 is adhered from the mesh sheet 11 to the TPU film 3A (see FIG. 6).

  The pressure-sensitive adhesive 2 is used to bond a cloth and a film, and may be water-based or oil-based. For example, a pressure sensitive adhesive 2 such as a polyethylene resin, a polyurethane resin, a vinyl acetate polymer resin, or a polypropylene resin can be used.

  Next, the woven fabric sheet 1A is polymerized on the surface to which the pressure-sensitive adhesive 2 of the TPU film 3A is applied with the thermocompression-bonding roll 20. At this time, when the woven fabric sheet 1A is sent to the thermocompression-bonding roll 20, it is necessary to prevent the woven fabric sheet 1A from wrinkling. Therefore, when the woven fabric sheet 1A is sent, a wrinkle removing roll 40 that contacts both surfaces of the woven fabric sheet 1A and removes the wrinkle of the woven fabric sheet 1A is provided (see FIG. 1). The illustrated wrinkle removing roll 40 is provided with a large number of thin rod-shaped contact rods 41 on the surface so that a uniform tension can be maintained.

  The thermocompression-bonding roll 20 integrates the woven fabric sheet 1A and the TPU film 3A by thermocompression bonding at the time of polymerization. When the pressure-sensitive adhesive 2 and the thermoplastic polyurethane resin 3 fused by the thermocompression-bonding roll 20 are cooled by the cooling roll 30, the woven fabric sheet 1 </ b> A in which the stretchability different depending on the material is uniformly regulated by the TPU film 3 </ b> A. Is formed (see FIG. 2). At this time, heat-conducting oil is stored inside the thermocompression-bonding roll 20, and a peeling Teflon (registered trademark) cloth 21 (hereinafter referred to as a peeling PTFE cloth 21) is attached to the surface (see FIG. 5). ).

  The film polymerization process 200 is a process in which the thermoplastic polyurethane resin 3 of the woven fabric sheet 1A integrated by the base forming mechanism A is overlapped with the stretched film 5 subjected to gravure printing. The stretched film 5 is a synthetic resin film. For example, gravure printing is performed on the stretched film 5 such as polypropylene, nylon, polyester, polyethylene, thermoplastic polyurethane resin, EVA ethylene vinyl acetate, and vinyl chloride. In the embodiment, nylon having a thickness of 15 μm is used for the stretched film 5 so that the fold of the woven fabric sheet 1A can be reproduced.

  This film polymerization process 200 is performed by the printing surface forming mechanism B of the apparatus of the present invention (see FIG. 3). First, the pressure sensitive adhesive 4 is applied to the stretched film 5 that has been subjected to gravure printing by the coating roll 50. The pressure sensitive adhesive 4 is selected from the same material as the pressure sensitive adhesive 2 used in the base formation mechanism A. Further, the coating roll 50 has the same configuration as the coating roll 10 of the base forming mechanism A (see FIG. 6).

  Thereafter, the pressure-sensitive adhesive 4 of the stretched film 5 is polymerized by the thermocompression roll 60 to the woven fabric sheet 1A whose expansion and contraction is regulated by the base formation mechanism A. The thermocompression-bonding roll 60 has the same configuration as the thermocompression-bonding roll 20, stores heat conducting oil inside, and affixes the peeling PTFE cloth 21 to the surface. Further, when the woven fabric sheet 1A is sent to the thermocompression-bonding roll 60, it is necessary to prevent the woven fabric sheet 1A from wrinkling. Therefore, a wrinkle removing roll 80 is provided to contact the both surfaces of the woven fabric sheet 1A to remove the wrinkles of the woven fabric sheet 1A when it is fed to the thermocompression bonding roll 60 (see FIG. 3). The wrinkle removing roll 80 has the same configuration as the wrinkle removing roll 40 of the base forming mechanism A (see FIG. 7). As described above, the stretchability of the woven fabric sheet 1A is regulated by the TPU film 3A and is uniformly fed by the wrinkle removing roll 80, whereby the polymerization process with the stretched film 5 can be performed accurately.

  The adhesion process 300 is a process of thermocompression bonding the polymerized woven fabric 1 and the stretched film 5. In this bonding process 300, the temperature at which the woven fabric 1 and the stretched film 5 are thermocompression bonded is set to 60 degrees or less. In the experiment, it was found that when the temperature for thermocompression bonding is 60 ° C. or more, shrinkage occurs after thermocompression bonding and wrinkles occur.

  The bonding process 300 is performed by the thermocompression bonding roll 60. That is, the surface of the stretched film 5 to which the pressure-sensitive adhesive 4 is applied is overlapped with the surface of the woven fabric sheet 1A to which the TPU film 3A has been adhered, and the thermocompression-bonding roll 60 heat-compresses the woven fabric sheet 1A. And the stretched film 5 are integrated. The thermocompression-bonding roll 60 in the illustrated example has heat conduction oil stored therein and a peeling PTFE cloth 21 attached to the surface. This thermocompression-bonding roll 60 has the same configuration as the thermocompression-bonding roll 20 of the base formation mechanism A (see FIG. 5).

  The cooling step 400 is a step of cooling the stretched film 5 that is pressure-bonded to the woven fabric 1. The cooling roll 70 is used for this process. In the illustrated example, two cooling rolls 70 are used, but this number can be changed as appropriate. Then, when the stretched film 5 and the pressure-sensitive adhesive 4 pressed on the woven fabric 1 are cooled by the cooling roll 70, the stretched film 5 is integrated with the woven fabric sheet 1A, and gravure printing is performed on the surface of the woven fabric sheet 1A. (See FIG. 4). The cooling roll 70 has the same configuration as the cooling roll 30 of the base formation mechanism A.

  In the illustrated example, the substrate forming mechanism A (see FIG. 1) and the printing surface forming mechanism B (see FIG. 3) are described as separate mechanisms in the apparatus of the present invention. It can be configured to use properly for each process. That is, the coating roll 10 of the base forming mechanism A is used as the coating roll 50 of the printing surface forming mechanism B. Similarly, the thermocompression-bonding roll 20 is used as the thermocompression-bonding roll 60, the cooling roll 30 is used as the cooling roll 70, and the wrinkle removal roll 40 is used as the wrinkle removal roll 80. As a result, a plurality of processes can be rationally performed with one apparatus.

  FIG. 8 shows an example of a handbag formed by sewing a woven fabric sheet 1A laminated with a gravure printing film of the present invention as a bag base P and sewing the bag base P. That is, a bag base P is formed by superposing a stretched film 5 subjected to gravure printing on a woven fabric 1 in which a thermoplastic polyurethane resin 3 is thermocompression bonded through a pressure-sensitive adhesive 2 through a weave. The base material P is formed by sewing.

  In this handbag, a woven fabric sheet 1A made of 420 denier polyester fiber was used, and a 15 μ-thick TPU film 3A was thermocompression bonded at a temperature of 70 ° C. to the surface. The stretched film 5 is a nylon film having a thickness of 15 μm subjected to gravure printing. Furthermore, the pressure-sensitive adhesive 2 used in the base formation mechanism A and the printing surface formation mechanism B uses a urethane adhesive. Then, the woven fabric sheet 1A and the stretched film 5 were slowly thermocompression bonded while being heated by a large thermocompression-bonding roll 20 at 50 degrees. Further, the bag base P formed by pre-cooling with the first cooling roll 70 and then cooling to a stable temperature with the second cooling roll 70 is used.

  The manufacturing apparatus and the bag of the present invention are not limited to the illustrated examples, and can be freely changed in design without changing the gist of the present invention. Moreover, the use of the woven fabric laminated with the gravure printing film produced in the present invention is not limited to a bag, and can be used for any product using the woven fabric.

DESCRIPTION OF SYMBOLS A Groundwork formation mechanism B Printing surface formation mechanism P Bag base material 1 Woven cloth 1A Woven cloth sheet 2 Pressure sensitive adhesive 3 Thermoplastic polyurethane resin 3A TPU film 4 Pressure sensitive adhesive 5 Stretched film 10 Application roll 11 Mesh sheet 20 Heat Crimp roll 21 Peeling PTFE cloth 30 Cooling roll 40 Wrinkle removing roll 41 Contact roll 50 Coating roll 60 Thermocompression roll 70 Cooling roll 80 Wrinkle removing roll 100 Resin pressure bonding process 200 Film polymerization process 300 Adhesion process 400 Cooling process

Claims (8)

  A resin pressure bonding process in which a thermoplastic polyurethane resin is thermocompression bonded through a pressure sensitive adhesive to the weave of the woven fabric, and the thermoplastic polyurethane resin to which the woven fabric is bonded is subjected to gravure printing via the pressure sensitive adhesive. A gravure comprising: a film polymerization process for superimposing applied stretched films; an adhesion process for thermocompression bonding the polymerized woven fabric and the stretched film; and a cooling process for cooling the stretched film crimped to the woven fabric. Laminating method of woven fabric with printing film.   The method for laminating a woven fabric with a gravure printing film according to claim 1, wherein a temperature at which the woven fabric and the stretched film are thermocompression bonded is set to 60 ° C. or less in the bonding step.   An application roll for applying pressure-sensitive adhesive to the TPU film, a thermo-compression roll for thermocompression bonding with a woven fabric sheet superimposed on the surface of the TPU film coated with the pressure-sensitive adhesive, and thermocompression bonding with the thermocompression-bonding roll A roll for cooling the formed TPU film, and an application roll for applying a pressure-sensitive adhesive to a stretched film subjected to gravure printing, and a pressure-sensitive adhesive for the stretched film And a thermocompression roll for thermocompression bonding the surface of the woven fabric sheet to which the TPU film is bonded, and a cooling roll for cooling the stretched film thermocompression bonded to the woven fabric sheet. An apparatus for laminating a woven fabric with a gravure printing film, characterized by comprising a printing surface forming mechanism.   The apparatus for laminating a woven fabric with a gravure printing film according to claim 3, wherein the coating roll is provided with a mesh sheet on the surface of the coating roll for adhering the pressure sensitive adhesive to the TPU film.   The laminating apparatus for woven fabric with a gravure printing film according to claim 3, wherein the thermocompression-bonding roll stores heat conduction oil inside and a peeling PTFE cloth is stuck on the surface.   The woven fabric fed to the thermocompression-bonding roll in the printing surface forming mechanism is provided with a wrinkle-removing roll that comes into contact with both surfaces of the woven fabric sheet to be sent to the thermocompression-bonding roll in the foundation forming mechanism, The apparatus for laminating a woven fabric with a gravure printing film according to claim 3, further comprising a wrinkle removing roll that contacts the both surfaces of the sheet to remove wrinkles of the woven fabric sheet.   7. The apparatus for laminating a woven fabric with a gravure printing film according to claim 3, wherein the foundation forming mechanism and the printing surface forming mechanism are used in common and used separately for each process.   Form a bag base material by overlaying a stretched film with gravure printing on a woven fabric thermo-compressed with a thermoplastic polyurethane resin via a pressure sensitive adhesive on the weave, and sew the bag base material A bag using a woven fabric laminated with a gravure printing film.

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