JP4841175B2 - Method for producing laminated body provided with release paper having release paper - Google Patents

Description

  The present invention relates to a method for manufacturing a laminate including a release paper having a peeling paper.

  Usually, the laminated body 5 provided with the release paper 3 which has the peeling white 31 as shown in FIGS. 1 and 2 is used, for example, in a backlight member of a liquid crystal display device. As shown in FIG. 3, a laminate 5 having a release paper 3 having a peeling sheet 31 used in such a backlight member is conventionally composed of (1) at least an adhesive layer 2 and a release paper 3 ′. A step of adhering the double-sided tape 4 to an arbitrary location on the substrate 1, (2) a step of cutting out the substrate 1 and the double-sided tape 4, and (3) the release paper 3 ′ of the double-sided tape 4 A step of peeling and removing from the pressure-sensitive adhesive layer 2; (4) a step of attaching a new release paper 3 on the pressure-sensitive adhesive layer 2 so that a peeling white 31 is obtained outside the substrate 1; Manufactured by sequentially performing a process of cutting the release paper 31 of the new release paper 3 to a desired length.

  However, what is manufactured in such a process is a process of sticking a new release paper to the adhesive layer so that release paper is obtained on the outside of the substrate after the release paper of the double-sided tape is peeled and removed. Therefore, when a new release paper is stuck, the sticking position may be shifted with respect to the adhesive layer, and the yield is poor. Further, the release paper provided in advance on the double-sided tape becomes dust and is not good for the environment, and the manufacturing process is also complicated.

  Therefore, the present invention has an object to provide a method for manufacturing a laminate including a release paper having a release sheet that significantly reduces the yield and yield of waste while reducing the number of wastes and the number of manufacturing steps compared to conventional ones. To do.

The manufacturing method of the laminated body provided with the release paper having the peeling sheet of the present invention that solves the above-mentioned object has an adhesive layer at least at the end on the substrate, and has a peeling sheet on the outer side of the substrate above the substrate A method for producing a laminate comprising a release paper,
Using a backlight member of a liquid crystal display device as the base material,
The following steps (1) to (3) are performed in order.
(1) The process of sticking the double-sided tape which consists of at least an adhesion layer and a release paper to the arbitrary locations on the said base material,
(2) a step of cutting out the base material and the adhesive layer of the double-sided tape from the surface opposite to the surface having the double-sided tape of the base material without cutting the release paper;
(3) The process of peeling and removing the adhesive layer of the base material and the double-sided tape from the release paper

  According to the present invention, it is possible to obtain a laminate including a release paper having a peeling sheet that has a reduced waste discharge and the number of manufacturing steps than the conventional ones, and has a significantly improved yield.

  Hereinafter, the manufacturing method of the laminated body provided with the release paper which has the peeling paper of this invention is demonstrated using FIGS.

  First, as shown in FIG. 1, the laminated body 5 provided with the release paper 3 having the peeling paper 31 referred to in the present invention is provided with an adhesive layer 2 at least at an end portion on the base material 1 and the base material on the upper layer. 1 is provided with a release paper 3 having a peeling sheet 31 on the outer side. Hereinafter, embodiments of each component will be described.

  The base material is not particularly limited as long as it can support the adhesive layer described later, and examples thereof include paper, cloth, plastic, glass and other film-like or plate-like ones. Examples of the plastic include polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polycarbonate, polypropylene, polyethylene, polyarylate, acrylic, acetylcellulose, and polyvinyl chloride. Moreover, such a base material may have functionality.

  When such a laminate is used in a backlight member of a liquid crystal display device, examples of the substrate include a light guide plate, a prism sheet, a light diffusing material, a light reflecting material, a polarizing film, a retardation film, Examples thereof include an electromagnetic wave shielding film.

  Next, the adhesive layer will be described. The adhesive layer is formed from at least an adhesive component. The adhesive component is not particularly limited, and natural resin-based adhesives, synthetic resin-based adhesives, etc. are used, and synthetic resin-based adhesives such as acrylic-based adhesives, silicone-based adhesives, urethane-based adhesives, etc. Agents are preferably used.

  The thickness of the pressure-sensitive adhesive layer is not particularly limited and can be appropriately determined according to the application.

  Next, the release paper is not particularly limited, but for example, polyethylene laminated paper, polypropylene, polyethylene, polyester, polycarbonate, triacetyl cellulose, polyvinyl chloride, acrylic, polystyrene, polyamide, polyimide, vinylidene chloride-vinyl chloride copolymer Examples thereof include a plastic film such as a coalesced one, and one having a release treatment applied to one surface of the plastic film.

  The thickness of the release paper is not particularly limited, but generally 10 μm to 250 μm, preferably 25 μm to 125 μm is used.

The present invention is a method of manufacturing a laminate 5 provided with a release paper 3 having such a peeling sheet 31 as shown in FIG.
(1) The process of sticking the double-sided tape 4 which consists of at least the adhesion layer 2 and the release paper 3 to the arbitrary locations on the said base material 1,
(2) a step of cutting out the base material 1 and the adhesive layer 2 of the double-sided tape 4 from the surface opposite to the surface having the double-sided tape 4 of the base material 1 without cutting the release paper 3;
(3) The step of peeling and removing the adhesive layer 2 of the base material 1 and the double-sided tape 4 from the release paper 3 is sequentially performed.

  By adopting such a manufacturing method, it is possible to reduce dust discharge and the number of manufacturing steps as compared with the case of manufacturing by a conventional manufacturing method, and to significantly improve the yield.

  When the laminate 5 provided with the release paper 3 having the peeling paper 31 shown in FIGS. 1 and 2 is manufactured by a conventional manufacturing method, as shown in FIG. 3, (1) at least the adhesive layer 2 and A step of adhering a double-sided tape 4 made of a release paper 3 ′ to any location on the base material 1, (2) a step of cutting out the base material 1 and the double-sided tape 4, and (3) the double-sided tape 4. A step of peeling and removing the release paper 3 ′ from the pressure-sensitive adhesive layer 2; (4) a new release paper 3 is stuck on the pressure-sensitive adhesive layer 2 so that a peeling white 31 is obtained outside the substrate 1; Process, (5) The process of cutting off the peeling paper 31 of the new release paper 3 to a desired length must be performed in order.

  However, in the case of manufacturing in such a conventional process, after the release paper 3 ′ of the double-sided tape 4 is peeled and removed from the pressure-sensitive adhesive layer 2, a new peeling sheet 31 is obtained so as to obtain the outer side of the substrate 1. Since it includes the step of adhering the release paper 3 to the adhesive layer 2, the adhering position may be shifted with respect to the adhesive layer 2 when attaching a new release paper 3.

  However, in the case of the present invention, the base material 1 and the adhesive layer 2 of the double-sided tape 4 are not cut from the surface of the base material 1 opposite to the surface having the double-sided tape 4. Is the process of peeling and removing the adhesive layer 2 of the base material 1 and the double-sided tape 4 from the release paper 3, so that a new release paper 3 is adhered to the adhesive layer 2 as in the past. Since the process is not included, there is no problem that the release paper and the adhesive layer are misaligned. Further, since the release paper 3 of the laminated body 5 is the release paper 3 ′ provided in advance on the double-sided tape 4, the release paper 3 ′ provided in advance on the double-sided tape 4 as in the prior art becomes garbage. Absent. Furthermore, the manufacturing process can be greatly simplified as compared with the conventional manufacturing method.

  As described above, according to the present invention, it is possible to reduce dust discharge and the number of manufacturing steps and to significantly improve the yield as compared with the case of manufacturing by a conventional manufacturing method.

  In the above description, as shown in FIG. 2, the release paper 3 has been described in which the adhesive layer 2 and the release white 31 portion are provided on the entire surface of one end of the base material 1. For example, as shown in FIG. 5, the adhesive layer 2 and the peeling white 31 may be provided on the entire surface of two or more ends of the substrate 1, and as shown in FIG. 6. As described above, the adhesive layer 2 and the peeling white 31 may be provided partially such as at the four corners of the substrate 1. Moreover, the peeling white 31 may be provided partially at the end of one side of the base material 1 (not shown).

[Example]
Using the light diffusing material, which is a backlight member of the liquid crystal display device, as the base material 1, 200 laminates 5 including the release paper 3 having the peeling paper 31 as shown in FIG. 2 were manufactured by the following manufacturing method.

  First, (1) the adhesive layer 2 of the double-sided tape 4 having a width of 8 mm was attached to the end portion on the long side on the light diffusing material 1 having a size of 20 cm × 10 cm. Next, (2) from the surface opposite to the surface having the double-sided tape 4 of the light diffusing material 1 at a position where the width of the double-sided tape 4 remaining on the light diffusing material 1 is 3 mm (the peeling white 31 is 5 mm). The light diffusing material 1 and the adhesive layer 2 of the double-sided tape 4 were cut out with a blade 6 without cutting the release paper 3 of the double-sided tape 4. And (3) The laminated body 5 provided with the release paper 3 which has the peeling white 31 of an Example by peeling and removing the said light-diffusion material 1 and the said adhesion layer 2 from the said release paper 3 was manufactured.

[Comparative example]
Using the same light diffusing material as in the example, 200 laminates 5 including the release paper 3 having the peeling paper 31 as shown in FIG. 2 were manufactured by the following manufacturing method.

  First, (1) the double-sided tape 4 is stuck on the light diffusing material 1 in the same manner as in the example, and (2) the light diffusing at a position where the width of the double-sided tape 4 remaining on the light diffusing material 1 is 3 mm. The material 1 and the double-sided tape 4 were cut out with a blade 6. Next, (3) the release paper 3 ′ of the double-sided tape 4 is peeled and removed from the adhesive layer 2, and (4) a release white 31 is obtained on the adhesive layer 2 outside the light diffusing material 1. A new release paper 3 was attached. (5) The laminate 5 provided with the release paper 3 having the release paper 31 of the comparative example was manufactured by cutting the release paper 3 so that the length of the release paper 31 of the new release paper 3 was 5 mm.

  When the laminated body provided with the release paper having the peeling sheet obtained in the examples and comparative examples was confirmed, all the products obtained by the production methods of the examples were good products, but obtained by the production methods of the comparative examples. As a result, 30 sheets became defective because the release paper was displaced from the adhesive layer.

Sectional drawing which shows one Embodiment of the laminated body provided with the release paper which has peeling paper said by this invention. The top view which shows one Embodiment of the laminated body provided with the release paper which has peeling paper said by this invention. Sectional drawing which shows one Embodiment of the manufacturing method of the laminated body provided with the release paper which has the conventional peeling paper. Sectional drawing which shows one Embodiment of the manufacturing method of the laminated body provided with the release paper which has the peeling paper of this invention. The top view which shows other embodiment of the laminated body provided with the release paper which has peeling paper said by this invention. The top view which shows other embodiment of the laminated body provided with the release paper which has peeling paper said by this invention.

Explanation of symbols

1 .... Base material (light diffusing material)
2 .... Adhesive layer 3 ... Release paper 3 '... Release paper 31 ... Release paper 4 ... Double-sided tape 5 ... Laminate with release paper having release paper 6 .... Blade

Claims (1)

A method for producing a laminate comprising a pressure-sensitive adhesive layer at least at an end on a substrate and a release paper having a release sheet outside the substrate on the upper layer,
Using a backlight member of a liquid crystal display device as the base material,
The manufacturing method of the laminated body provided with the release paper which has the peeling white characterized by performing the process of following (1)-(3) in order.
(1) The process of sticking the double-sided tape which consists of at least an adhesion layer and a release paper to the arbitrary locations on the said base material,
(2) a step of cutting out the base material and the adhesive layer of the double-sided tape from the surface opposite to the surface having the double-sided tape of the base material without cutting the release paper;
(3) The process of peeling and removing the adhesive layer of the base material and the double-sided tape from the release paper

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