JP5127766B2 - Adhesive sheet - Google Patents

Description

The present invention relates to an adhesive sheet having a stretchable and flexible foam substrate.

  Conventionally, this type of adhesive sheet has an adhesive layer formed on both sides of the net by means of application, impregnation, spraying, etc., and the net is adhered to the surface of the breathable material by the adhesive layer on one side Further, there is disclosed a breathable member in which the surface of the net that is not bonded to the breathable material is covered with a release paper such as a separate paper or a plastic film impregnated with a silicon resin by an adhesive layer on the other side. (For example, refer to Patent Document 1). This air-permeable member is overlapped on the surface of the release paper that has been pulled out from the roll and conveyed by a conveyor, etc. Further, it is manufactured by superposing a sheet-like breathable material on the surface of the net. The breathable material is made of urethane foam, recycled felt, etc. The net is made of natural fibers such as cotton and linen, or chemical fibers such as nylon and polyester, and various plastic films. It is formed by punching into a shape or heat welding. In the breathable member configured in this way, since the adhesive layer is limited to the net portion of the net, the material layer can be used even when it is joined to other members without blocking the vent hole of the material by the adhesive layer. It is designed to ensure the breathability inherent to the.

Japanese Utility Model Publication No. 7-2048 (paragraphs [0012], [0017], [0018], [0019])

  However, in the breathable member disclosed in Patent Document 1 above, the adhesive layer is formed only around the net of the net in order to make this member breathable. Since it is not formed in the part of the enclosed gap), there is a problem in that the adhesive force to the other member of the breathable member becomes insufficient and the breathable member is easily peeled off. Further, the breathable member disclosed in the above-described conventional patent document 1 has a problem that the gluing device becomes complicated because the adhesive is applied to both sides of the net by the gluing device.

An object of the present invention is, without reducing the adhesion to other members, and excellent dimensional stability of the foam substrate, the near further simplify the coating apparatus of the adhesive, to provide a pressure-sensitive adhesive sheet The

The first aspect of the present invention, as shown in FIG. 4, the peeling Phil arm and a releasably laminated adhered film side adhesive layer on the peeling fill beam, one surface on the film side adhesive layer In a pressure-sensitive adhesive sheet comprising: a net 53 laminated and bonded; and a stretchable and flexible foamable base material laminated and bonded to the other surface of the net 53 via a base-side pressure-sensitive adhesive layer. side adhesive layer is applied to the entire one surface of the release fill arm with closing the mesh 53c of the net 53, the adhesive protruding in the foaming base material side from the mesh 53c of the net 53 of the film side adhesive layer The base material-side pressure-sensitive adhesive layer is formed, and the net 53 is heat-sealed in a state where two grid-like nets having a rectangular mesh 53c are shifted by a predetermined angle within a range of 2 to 43 degrees. The rectangular mesh 53c without the predetermined angle. Characterized in that formed in the double reticulated.

The second aspect of the present invention is a stretchable and flexible foamable substrate, a net having one surface laminated and bonded to the foamable substrate via a substrate-side pressure-sensitive adhesive layer, In a pressure-sensitive adhesive sheet comprising a film-side pressure-sensitive adhesive layer laminated and bonded to the other surface of the net and a release film laminated and bonded to the film-side pressure-sensitive adhesive layer, the substrate-side pressure-sensitive adhesive layer is made of a foamable substrate. It is applied to the entire surface to close the mesh of the net, and the film-side pressure-sensitive adhesive layer is composed of the base-side pressure-sensitive adhesive layer that protrudes from the net mesh to the release film side . Two lattice-shaped nets having a mesh are heat-sealed in a state shifted by a predetermined angle within a range of 2 to 43 degrees to form a rectangular mesh in the form of a double network shifted by the predetermined angle. It is characterized by that.

  In the pressure-sensitive adhesive sheet according to the first aspect of the present invention, the film-side pressure-sensitive adhesive layer is laminated and adhered to the release film so that the film-side pressure-sensitive adhesive layer can be peeled off. In addition, the base-side pressure-sensitive adhesive layer is composed of the adhesive on the film-side pressure-sensitive adhesive layer that protrudes from the net network to the foamable base-material side. It is possible to simplify the applicator for the pressure-sensitive adhesive that does not decrease and becomes the film-side pressure-sensitive adhesive layer and the substrate-side pressure-sensitive adhesive layer. Moreover, since the extensibility of a foamable base material is suppressed by a net, it is excellent in the dimensional stability of a foamable base material, and the sticking operation | work to the other member of an adhesive sheet can be performed very easily.

  In the pressure-sensitive adhesive sheet according to the second aspect of the present invention, the base material-side pressure-sensitive adhesive layer is applied to the entire one surface of the foamable base material to close the net network, and among the base-material-side pressure-sensitive adhesive layer, the net mesh Since the film-side pressure-sensitive adhesive layer is composed of the pressure-sensitive adhesive that protrudes from the release film side, the adhesive force to other members of the pressure-sensitive adhesive sheet is not reduced, and the base-side pressure-sensitive adhesive layer and the film-side pressure-sensitive adhesive layer The pressure-sensitive adhesive coating apparatus can be simplified. Moreover, since the extensibility of a foamable base material is suppressed by a net, it is excellent in the dimensional stability of a foamable base material, and the sticking operation | work to the other member of an adhesive sheet can be performed very easily.

It is a section lineblock diagram showing a reference adhesive sheet. It is a top view which shows a part of net | network used for the adhesive sheet. It is a block diagram of the manufacturing apparatus which shows the process of manufacturing the adhesive sheet. It is a top view which shows a part of net | network of 1st Embodiment of this invention.

Next, modes for carrying out the present invention will be described with reference to the drawings together with reference modes .
< Reference form>
As shown in FIG. 1, the pressure-sensitive adhesive sheet 10 includes a release film 11, a film-side pressure-sensitive adhesive layer 12 that is laminated and adhered to the release film 11 in a peelable manner, and one surface laminated on the film-side pressure-sensitive adhesive layer 12. A net 13 that is bonded and a foamable base material 16 that is laminated and bonded to the other surface of the net 13 via a base material-side pressure-sensitive adhesive layer 14 are provided. Although not shown, the release film 11 is composed of paper, polypropylene, or the like in which a silicone-based release agent layer is formed on the surface to which the film-side pressure-sensitive adhesive layer 12 is laminated and bonded. The release film 11 is easily peeled off from the film-side pressure-sensitive adhesive layer 12 due to the presence of the release agent layer. As shown in detail in FIG. 2, the net 13 is made of a polyolefin such as polyethylene or polypropylene, polyethylene terephthalate, polyamide, polyvinyl alcohol, polyacrylonitrile, polyurethane, or a synthetic fiber such as halogen-containing polymer, or cellulose such as cotton, hemp, or silk. A warp 13a and a weft 13b made of inorganic fibers such as fiber, glass fiber, and metal mesh are knitted or arranged in a lattice shape, and then the intersections of these yarns 13a and 13b are heat-sealed to each other to form a mesh. Or by melting synthetic resins such as polyethylene, polypropylene, and other polyolefins, polyethylene terephthalate, polyamide, polyvinyl alcohol, polyacrylonitrile, polyurethane, halogen-containing polymers, etc., and pouring them into a lattice mold Or formed into a net by punching a sheet made of synthetic resin such as polyolefin such as polyethylene and polypropylene, polyethylene terephthalate, polyamide, polyvinyl alcohol, polyacrylonitrile, polyurethane and halogen-containing polymer with a press. Is done. The net 13 made of synthetic resin is configured such that the elongation percentage of at least one of the longitudinal direction of the warp yarn 13a or the longitudinal direction of the weft yarn 13b is 80% or less, preferably 50% or less by a method according to JIS L1096. Is done. Further, the thickness D of the warp yarn 13a and the weft yarn 13b constituting the net 13 is 1.0 mm or less, preferably 100 μm to 0.5 mm, and the mesh of the net 13 (the gap created by the warp yarn 13a and the weft yarn 13b (rectangular mesh 13c P) is also set in the range of 1 to 50 mm, preferably 3 to 10 mm. Here, the reason why the thickness of the warp 13a and the weft 13b of the net 13 is limited to 1.0 mm or less is that if the thickness exceeds 1.0 mm, the net rises too much from the adhesive surface, and the adhesive performance is extremely lowered. is there. Moreover, the opening P of the net 13 is limited to the range of 1 to 50 mm because the adhesive 21 (FIG. 3) is less likely to enter the net 13 c of the net 13 if it is less than 1 mm, and the foamable base material if it exceeds 50 mm. This is because the dimensional stability of 16 decreases.

  As the pressure-sensitive adhesive 21 (FIG. 3) as a raw material for the film-side pressure-sensitive adhesive layer 12 and the substrate-side pressure-sensitive adhesive layer 14, an EVA hot melt type that exhibits pressure-sensitive adhesiveness under heating and exhibits excellent adhesion at room temperature. Adhesives, rubber-based hot-melt adhesives, aqueous adhesives such as acrylic emulsion, EVA emulsion, SBR emulsion, vinyl acetate emulsion, and solvent-based adhesives such as acrylic, EVA, SBR, and vinyl acetate Is used. Further, as the foamable substrate 16, EPDM (Ethylene Propylene Diene Terpolymer) foam, urethane foam, polyethylene foam or the like having extensibility and flexibility is used. The film-side pressure-sensitive adhesive layer 12 is applied to one entire surface of the release film 11 to block the mesh 13c of the net 13, and in the film-side pressure-sensitive adhesive layer 12, from the net 13c of the net 13 to the foamable substrate 16 side. The base material side adhesive layer 14 is constituted by the protruding adhesive 21 (FIG. 3).

  As an example of the pressure-sensitive adhesive sheet 10 configured as described above, a method for producing a hot-melt pressure-sensitive adhesive sheet will be described with reference to FIGS. First, the adhesive 21 is applied to the entire one surface of the release film 11. Next, the net 13 is overlapped on one surface of the release film 11, that is, the surface to which the adhesive 21 is applied. As a result, the film-side pressure-sensitive adhesive layer 12 is laminated and adhered to the release film 11 so as to be peelable, and one surface of the net 13 is laminated and adhered to the film-side pressure-sensitive adhesive layer 12. The film-side pressure-sensitive adhesive layer 12 protrudes from one surface of the net 13 to the other surface of the net 13 through the mesh 13c. In this state, the foamable substrate 16 is overlaid on the other surface of the net 13. As a result, the pressure-sensitive adhesive 21 that protruded from the other surface of the net 13 was used as the base-side pressure-sensitive adhesive layer 14, and the foamable base material 16 was laminated and bonded to the base-side pressure-sensitive adhesive layer 14 to obtain the pressure-sensitive adhesive sheet 10. Thus, without applying the adhesive 21 to both sides of the net 13, the release film 11, the film-side pressure-sensitive adhesive layer 12, the net 13, and the substrate-side-side pressure-sensitive adhesive layer can be applied only to one surface of the release film 11. 14 and the adhesive sheet 10 which consists of a laminated body of the foamable base material 16 can be manufactured. As a result, the coating device for the adhesive 21 in the manufacturing process of the adhesive sheet 10 can be simplified.

  In the pressure-sensitive adhesive sheet 10 thus manufactured, the film-side pressure-sensitive adhesive layer 12 is laminated and adhered to the release film 11 so that the film-side pressure-sensitive adhesive layer 12 is peelable, and the net 13 is laminated and adhered to the film-side pressure-sensitive adhesive layer 12. The layer 12 closes the mesh of the net 13, and the adhesive 21 that protrudes from the mesh 13c of the net 13 to the foamable substrate 16 side of the film-side adhesive layer 12 is used as the substrate-side adhesive layer 14, and this substrate Since the foamable base material 16 is laminated and bonded to the side pressure-sensitive adhesive layer 14, the adhesive force to the other members of the pressure-sensitive adhesive sheet 10 is not reduced, and the film-side pressure-sensitive adhesive layer 12 and the base-material-side pressure-sensitive adhesive layer 14 are not reduced. The application | coating apparatus of the adhesive 21 used as follows can be simplified. Moreover, since the extensibility of the foamable base material 16 is suppressed by the net 13, it is excellent in the dimensional stability of the foamable base material 16, and the sticking operation | work to the other member of the adhesive sheet 10 can be performed very easily.

< First Embodiment>
FIG. 4 shows a first embodiment of the present invention. In this embodiment, the net 53 is not a lattice having a rectangular mesh, but two lattice-shaped nets having a rectangular mesh 53c are arranged at a predetermined angle θ, for example, 2 to 43 degrees, preferably 5 to 40 degrees. The rectangular mesh 53c is formed in a double mesh shape shifted by a predetermined angle by heat fusion in a shifted state. Specifically, the split fibers 53a made of stretched plastic such as polyolefin are continuously laminated in the vertical, horizontal and diagonal directions, and then heat-sealed. The net may be formed by heat-sealing a grid-like net having three or more rectangular meshes shifted by a predetermined angle, or poured into a predetermined mold and formed once. In this case, the net may be formed in a double or triple mesh shape with a rectangular mesh shifted by a predetermined angle. The configuration of the pressure-sensitive adhesive sheet other than the above is the same as that of the reference form, and the manufacturing method of this pressure-sensitive adhesive sheet is also the same as that of the reference form. In the pressure-sensitive adhesive sheet configured as described above, the extending direction of the split fibers 53a of the net 53 is increased, and deformation of the net 53 in those directions is prevented, so that the dimensional stability can be improved as compared with the reference form. Since operations other than those described above are substantially the same as those of the reference embodiment, repeated description is omitted.

In the reference embodiment and the first embodiment, the film-side pressure-sensitive adhesive layer, the net, the base-side pressure-sensitive adhesive layer, and the foamable base material were laminated and adhered in this order on the release film. On the substrate, the substrate-side pressure-sensitive adhesive layer, the net, the film-side pressure-sensitive adhesive layer, and the release film may be laminated and bonded in this order. In this case, the base material-side pressure-sensitive adhesive layer is applied to one entire surface of the foamable base material to close the net network, and the base-material-side pressure-sensitive adhesive layer protrudes from the net network to the release film side. Thus, the film side pressure-sensitive adhesive layer is constituted. In addition, this pressure-sensitive adhesive sheet is obtained by applying a pressure-sensitive adhesive serving as a substrate-side pressure-sensitive adhesive layer to one whole surface of the foamable substrate, laminating and bonding the net thereon, and further forming the net of the substrate-side pressure-sensitive adhesive layer. The pressure-sensitive adhesive protruding from one surface to the other surface is used as a film-side pressure-sensitive adhesive layer, and the release film is laminated and adhered to the film-side pressure-sensitive adhesive layer in a peelable manner.

DESCRIPTION OF SYMBOLS 10 Adhesive sheet 11 Release film 12 Film side adhesive layer 13,53 Net 13c, 53c Mesh 14 Base material side adhesive layer 16 Foamable base material 21 Adhesive

Claims (2)

And peeling Phil arm, and the release fill arm to releasably laminated adhered film side adhesive layer, a net (53) to the film side one face to the pressure-sensitive adhesive layer is laminated and adhered, the net (53) In the pressure-sensitive adhesive sheet having a stretchable and flexible foamable base material laminated and bonded to the other surface of the base material side through the base material-side pressure-sensitive adhesive layer ,
Together block the mesh (53c) of said net (53) the film side adhesive layer is applied to the entire one surface of the release-fill-time, the meshes of the net of the film side adhesive layer (53) ( the foamable more the substrate-side pressure-sensitive adhesive layer in the pressure-sensitive adhesive protruding to the substrate side from 53c) is formed,
The net (53) is heat-sealed in a state in which two grid-like nets having a rectangular mesh (53c) are shifted by a predetermined angle within a range of 2 to 43 degrees, and the rectangular mesh ( 53c) is formed into a double mesh shape shifted by the predetermined angle . A stretchable and flexible foam base, a net with one side laminated to the foam base via a base-side adhesive layer, and the other side of the net In a pressure-sensitive adhesive sheet comprising a film-side pressure-sensitive adhesive layer and a release film laminated and adhered to the film-side pressure-sensitive adhesive layer in a peelable manner,
The base material-side pressure-sensitive adhesive layer is applied to one entire surface of the foamable base material to close the net network, and the base-side pressure-sensitive adhesive layer protrudes from the net network to the release film side. The film-side pressure-sensitive adhesive layer is constituted by the pressure-sensitive adhesive ,
The net is heat-sealed in a state where two grid-like nets having a rectangular mesh are shifted by a predetermined angle within a range of 2 to 43 degrees, and the rectangular mesh is shifted by the predetermined angle. A pressure-sensitive adhesive sheet formed into a double mesh shape .

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