Pressure-sensitive adhesive tape

A technology of adhesive tape and adhesive layer, applied in the direction of adhesive, film/sheet adhesive, adhesive products, etc., can solve the problems of difficult prism sheet appearance inspection, etc., and achieve the effect of suppressing fluctuations

Inactive Publication Date: 2011-02-02
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, when the appearance of the prism sheet with the surface protection film is undulated (indentation), it is difficult to carry out the appearance inspection of the prism sheet in the state where the surface protection film is pasted.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0105] The following compounds were prepared as the substrate layer forming material, the first pressure-sensitive adhesive layer forming material, and the second pressure-sensitive adhesive layer forming material.

[0106] Substrate layer forming material: Block polypropylene (manufactured by SunAllomer: PF380A)

[0107] Material for forming the first adhesive layer: 70 parts of a styrene-based elastomer (manufactured by Asahi Kasei Chemical Co., Ltd.: タフテック H1041) composed of a hydrogenated product of a styrene-butadiene-based copolymer, and a tackifier (manufactured by Arakawa Chemical Industry Co., Ltd.) : Alcon P-125) 30 parts mixture

[0108] Material for forming the second adhesive layer: 70 parts of styrene-based elastomer (manufactured by JSR Corporation: Dinaron 1320P) composed of a hydrogenated product of a styrene-butadiene-based copolymer and a tackifier (manufactured by Arakawa Chemical Industry Co., Ltd.: Alcon P-125) 30 parts mixture

[0109] The above materi...

Embodiment 2

[0111] 70 parts of a styrene-based elastomer (manufactured by Asahi Kasei Chemical Co., Ltd.: テフテック H1041) and 30 parts of a tackifier (manufactured by Arakawa Chemical Industry Co., Ltd.: Alcon P-125) composed of hydrogenated styrene-butadiene copolymers were used. As a material for forming the first adhesive layer, 70 parts of a styrene-based elastomer (manufactured by Asahi Kasei Chemical Co., Ltd.: タフテック H1221) composed of a hydrogenated styrene-butadiene copolymer and a tackifier (Arakawa Chemical industry company make: Alcon P-125) 30 parts of mixtures were used as a 2nd adhesive layer forming material, and it carried out similarly to Example 1, and obtained the adhesive tape (2). The thickness of the substrate layer was 38 μm, the thickness of the first adhesive layer was 4 μm, and the thickness of the second adhesive layer was 4 μm. Table 1 shows the evaluation results of the obtained adhesive tape (2).

Embodiment 3

[0113] 70 parts of a styrene-based elastomer (manufactured by Asahi Kasei Chemical Co., Ltd.: テフテック H1041) and 30 parts of a tackifier (manufactured by Arakawa Chemical Industry Co., Ltd.: Alcon P-125) composed of hydrogenated styrene-butadiene copolymers were used. As a material for forming the first adhesive layer, 70 parts of a styrene-based elastomer (manufactured by Kraton: G1657) composed of a hydrogenated styrene-butadiene copolymer and a tackifier (Arakawa Chemical Co., Ltd. Industrial Co., Ltd. product: Alcon P-125) Except having used the mixture of 30 parts as a 2nd adhesive layer forming material, it carried out similarly to Example 1, and obtained the adhesive tape (3). The thickness of the substrate layer was 38 μm, the thickness of the first adhesive layer was 4 μm, and the thickness of the second adhesive layer was 4 μm. Table 1 shows the evaluation results of the obtained adhesive tape (3).

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Abstract

Provided is such a pressure-sensitive adhesive tape as described below, which is capable of protecting the uneven surface of a member having unevenness on its surface. The pressure-sensitive adhesive tape brings together sufficient pressure-sensitive adhesiveness for, and sufficient releasability from, the member. In addition, even upon deformation of the member protected with the pressure-sensitive adhesive tape by, for example, lamination or continuous winding, the uneven shape does not deform and a base material layer in the pressure-sensitive adhesive tape is not damaged. Also provided is a pressure-sensitive adhesive tape useful as such a surface protective film for a prism sheet as described below, which is capable of effectively protecting, for example, a lens surface of a prism sheet having multiple triangle pole-shaped prisms fixed on its surface. The surface protective film brings together sufficient pressure-sensitive adhesiveness for, and sufficient releasability from, the prism sheet. In addition, when the prism sheet protected with the surface protective film is brought into a state such as a laminated state or a continuously wound state, the emergence of irregularity (indentation) in the external appearance of the prism sheet to which the surface protective film is attached can be suppressed. A pressure-sensitive adhesive tape of the present invention is a pressure-sensitive adhesive tape including a base material layer, a first pressure-sensitive adhesive layer, and a second pressure-sensitive adhesive layer in the stated order, in which: the base material layer contains a thermoplastic resin; the storage modulus of the first pressure-sensitive adhesive layer is higher than the storage modulus of the second pressure-sensitive adhesive layer.

Description

technical field [0001] This invention relates to adhesive tapes. In more detail, it is related with the adhesive tape which can protect the uneven|corrugated surface of the member which has uneven|corrugated surface effectively. The adhesive tape of the present invention is used, for example, as a surface protection film for a concave-convex part that is designed by forming concave-convex on the surface used in the automobile industry or the housing building material industry, or can effectively protect a plurality of triangular columnar prisms fixed on the surface. The surface protection film of the lens surface of the prism sheet is especially useful. Background technique [0002] In general, an adhesive tape in which an adhesive layer is laminated on one surface of a film base layer is widely used in order to protect the surface of various adherends. [0003] On the other hand, there are many components with irregularities formed on the surface in order to impart design...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02C09J7/38
CPCC09J7/0207B32B7/12C09J2201/36C09J2201/622B32B7/06B32B25/08B32B27/16B32B27/18B32B27/20B32B27/283B32B27/302B32B27/304B32B27/306B32B27/308B32B27/32B32B27/322B32B27/34B32B27/36B32B27/365B32B27/40B32B2250/24B32B2270/00B32B2307/50B32B2307/748B32B2405/00C09J7/38Y10T428/2848Y10T428/2839C09J2301/208C09J2301/312C09J7/40C09J9/00G02B5/04C09J2203/00C09J2301/302
Inventor 林直人生岛伸祐大山高辉林圭治内田翔武田公平花木一康
Owner NITTO DENKO CORP
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