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Surface protective film

A technology for protecting film and adhesive layer, applied in the direction of film/sheet adhesive, thin material handling, adhesive type, etc., to achieve the effect of improving unwinding

Inactive Publication Date: 2010-03-24
IDEMITSU UNITECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The main object of the present invention is to solve the above-mentioned problems, etc., and to provide a surface protection film that has good unwinding property from a laminated body and does not require release treatment of the base material layer.

Method used

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Examples

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Effect test

Embodiment 1

[0097]A styrene-based elastomer containing a vinyl-polyisoprene block (Kuraray manufactured by the company, trade name HYBRAR7125) 100 parts by weight, RPP (manufactured by Japan Polypro Corporation, trade name WFW-4) 35 parts by weight, tackifier (Idemitsu Kosan, trade name IMARV P-140) 16 parts by weight as polyolefin parts by weight, as the adhesive layer material.

[0098] This adhesive layer material was co-extruded with BPP (manufactured by SunAllomer, trade name PC-684S) as a substrate layer material by a two-layer co-extrusion method so that the thickness of the adhesive layer was 11 μm and the thickness of the substrate layer was 39 μm. Surface protection film.

Embodiment 2

[0100] Except having changed the compounding quantity of polyolefin into 38 weight part, and the compounding quantity of a tackifier into 9 weight part, it carried out similarly to Example 1, and obtained the surface protection film.

Embodiment 3

[0102] The styrene-based elastomer was changed to a styrene-based vinyl-polyisoprene block containing 13% styrene, 100% triblock copolymer, and a glass transition temperature of -32°C. A ethylene-based elastomer (manufactured by Kuraray Corporation, trade name HYBRAR7311) was carried out in the same manner as in Example 1 except that, to obtain a surface protection film.

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Abstract

Disclosed is a surface protective film comprising a base layer and an adhesive layer. The adhesive layer contains a styrene elastomer, a polyolefin and a tackifier, and the styrene elastomer containsa hydrogenated or non-hydrogenated vinyl-polyisoprene block. The styrene elastomer has a styrene content of not less than 5% but not more than 30%, a triblock copolymer content of not less than 80%, and a glass transition temperature of not less than -40 DEG C but not more than 20 DEG C.

Description

technical field [0001] The invention relates to a surface protection film. It is especially suitable as a surface protection film for surface protection of an adherend having protrusions on the surface of a prism sheet or the like. Background technique [0002] There are known surface protection films that are temporarily attached to the surface of a metal plate, glass plate, synthetic resin plate, etc. to prevent damage to the surface of these articles or adhesion of dirt or the like (for example, Patent Document 1 to Patent Document 3). [0003] For example, Patent Document 1 discloses that a polyolefin-based resin substrate and an adhesive layer are provided, and that the adhesive layer contains a block copolymer represented by the general formula A-B-A (wherein A is a styrene-based polymer block, B is a surface protection film of a copolymer block of ethylene and butene) and a tackifying resin. [0004] The surface protection film described in Patent Document 1 can be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02B32B27/00C09J125/08C09J153/00
CPCB32B25/08C09J153/025C08L53/025C08L53/02C09J7/021B32B25/00C09J2453/00C09J153/02B32B27/32C08L23/02C09J2423/00B32B7/12B32B25/12B32B27/20B32B2250/24B32B2307/536B32B2307/54B32B2307/558C08L2666/02C09J7/381Y10T428/265Y10T428/2883C08L2666/04C09J7/383
Inventor 木村阳一郎北岛诚之
Owner IDEMITSU UNITECH CO LTD
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