Surface protection film

A technology for protecting film and substrate layers, applied in the direction of film/sheet adhesives, adhesives, etc., can solve the problem of surface protection film floating and achieve the effect of suppressing floating

Inactive Publication Date: 2015-09-02
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when the conventional surface protection film is attached to a curved surface, the surface protection film tends to be lifted from the curved surface.
In particular, when a conventional surface protection film is pasted on a flat surface and the surface is bent by thermoforming, the surface protection film is particularly likely to be lifted from the curved surface.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0121] Preparation of substrate layer (1A)

[0122] Low-density polyethylene (manufactured by Japan Polyethylene Corporation, trade name: NOVATEC LD LC720, density=0.922g / cm 3 ) as the substrate layer (1A) forming material.

[0123] Preparation of substrate layer (1B)

[0124] Compounding low-density polyethylene (manufactured by Tosoh Corporation, trade name: Petrothene 186R, density=0.924g / cm 3 ): 90 parts by weight, and linear low-density polyethylene (manufactured by Sumitomo Chemical, trade name: EXCELLEN FX FX307, density = 0.890 g / cm 3 ): 10% by weight, as a material for forming the substrate layer (1B).

[0125] Preparation of Adhesive Layer (1)

[0126] Compounded SEBS (hydrogenated SEBS, manufactured by JSR, trade name: DYNARON1321P, styrene content = 10% by weight): 70 parts by weight and tackifier (C5 type hydrogenated aromatic petroleum resin, manufactured by Idemitsu Kosan, trade name: IMARV P140 , ring and ball method softening point = 140°C): 30 part...

Embodiment 2

[0131] Preparation of substrate layer (2A)

[0132] Low-density polyethylene (manufactured by Japan Polyethylene Corporation, trade name: NOVATEC LD LC720, density=0.922g / cm 3 ) as the substrate layer (2A) forming material.

[0133] Preparation of substrate layer (2B)

[0134] Compounding low-density polyethylene (manufactured by Tosoh Corporation, trade name: Petrothene 186R, density=0.924g / cm 3 ): 90 parts by weight and linear low-density polyethylene (manufactured by Sumitomo Chemical, trade name: EXCELLEN FX FX307, density = 0.890 g / cm 3 ): 10% by weight, as a material for forming the substrate layer (2B).

[0135] Preparation of adhesive layer (2)

[0136] Compounded SEBS (hydrogenated SEBS, manufactured by JSR, trade name: DYNARON1321P, styrene content = 10% by weight): 70 parts by weight and tackifier (C5 type hydrogenated aromatic petroleum resin, manufactured by Idemitsu Kosan, trade name: IMARV P140 , ring and ball softening point = 140°C): 30 parts by wei...

Embodiment 3

[0141] Preparation of substrate layer (3A)

[0142] Low-density polyethylene (manufactured by Japan Polyethylene Corporation, trade name: NOVATEC LD LC720, density=0.922g / cm 3 ) as the substrate layer (3A) forming material.

[0143] Preparation of substrate layer (3B)

[0144] Compounding low-density polyethylene (manufactured by Tosoh Corporation, trade name: Petrothene 186R, density=0.924g / cm 3 ): 90 parts by weight and linear low-density polyethylene (manufactured by Sumitomo Chemical, trade name: EXCELLEN FX FX307, density = 0.890 g / cm 3 ): 10% by weight, as a material for forming the substrate layer (3B).

[0145] Preparation of adhesive layer (3)

[0146] Compounding SEBS (hydrogenated SEBS, manufactured by JSR, trade name: DYNARON1321P, styrene content = 10% by weight): 60 parts by weight and tackifier (C5 type hydrogenated aromatic petroleum resin, manufactured by Idemitsu Kosan, trade name: IMARV P140 , ring and ball softening point = 140°C): 40 parts by weig...

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Abstract

The invention provides a surface protection film. The surface protection film comprises a base layer and a binder layer. Even if the surface protection film is bonded to a bend plane, the surface protection film can effectively inhibit separation of the surface protection film from the bend plane. The surface protection film comprises the base layer and the binder layer. In a 30g constant load peeling test at a temperature of 23 DEG C, the surface protection film has a peeling distance of 70mm / h or less and In a 30g constant load peeling test at a temperature of 40 DEG C, the surface protection film has a peeling distance of 300mm / h or less.

Description

technical field [0001] The present invention relates to surface protection films. Background technique [0002] The surface protection film is usually provided with an adhesive layer on one side of the base material layer. As a method of producing such a surface protection film having a base material layer and an adhesive layer, a method of integrally forming the base material layer and the adhesive layer by coextrusion molding has been proposed (for example, refer to Patent Document 1). [0003] For the surface protection film, it is sometimes required not only to stick on a flat surface, but also to stick to a curved surface such as a concave surface or a convex surface. [0004] However, when the conventional surface protection film is attached to a curved surface, the surface protection film tends to be lifted from the curved surface. In particular, when a conventional surface protection film is attached to a plane and then the plane is bent by thermoforming, the surfa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02C09J153/02
Inventor 堀口计武田公平生岛伸祐
Owner NITTO DENKO CORP
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