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Layered film

A technology of laminating film and substrate layer, applied in the direction of coating, layered product, adhesive type, etc., can solve the problem of excessive adhesion of prism sheet

Active Publication Date: 2018-08-28
TORAY ADVANCED FILM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this proposal, the properties are controlled by controlling the block structure of the block copolymer, and attention is paid to the loss tangent tanδ peak temperature range of the adhesive layer and the value of the shear storage elastic modulus at 70°C, but optical The shape and characteristics of the back of the prism sheet are various, and it is difficult to widely apply it as a protective film for various adherends only by using the characteristics of a specific temperature, and the adhesive force on the back of the prism sheet is excessive.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097] As the styrene-based elastomer, 5 parts by mass of FTR6125 made by Mitsui Chemicals Co., Ltd. and 5 parts by mass of FTR6125 made by Arakawa Chemical Industry Co., Ltd. were added to 90 parts by mass of Elastomer S1606 (50 mass % of styrene) made by Asahi Kasei Chemical Co., Ltd. The ratio of ALCON P100 was dry mixed to prepare an adhesive layer resin composition.

[0098] As the base material layer, a commercially available isotactic polypropylene (homopolypropylene) having a melt flow rate (MFR, 230° C., 2.16 kg) of 4 g / 10 minutes was used.

[0099]Into two types of two-layer T-molded film machines having two single-screw extruders with a compression ratio of 4.2 and L / D=25, the above-mentioned resin composition for the adhesive layer and the resin for the substrate layer were injected so as to make the adhesive layer. The laminate side was casted so that it was brought into contact with a metal cooling roll controlled at a temperature of 30°C, cooled and solidified t...

Embodiment 2

[0101] A film having an overall thickness of 40 μm was obtained in the same manner as in Example 1, except that the composition of the adhesive layer of Example 1 was changed as shown below.

[0102] · Elastomer S1606 (50% by mass of styrene) manufactured by Asahi Kasei Chemical Co., Ltd.: 80 parts by mass

[0103] · TUFTEC H1052 (20% by mass of styrene) manufactured by Asahi Kasei Chemical Co., Ltd.: 10 parts by mass

[0104] · FTR6125 manufactured by Mitsui Chemicals Co., Ltd.: 5 parts by mass

[0105] · ALCON P100 manufactured by Arakawa Chemical Industry Co., Ltd.: 5 parts by mass.

Embodiment 3

[0107] A film having an overall thickness of 40 μm was obtained in the same manner as in Example 1, except that the composition of the adhesive layer of Example 1 was changed as shown below.

[0108] · Elastomer S1606 manufactured by Asahi Kasei Chemical Co., Ltd.: 70 parts by mass

[0109] · TUFTEC H1052 manufactured by Asahi Kasei Chemical Co., Ltd.: 20 parts by mass

[0110] · FTR6125 manufactured by Mitsui Chemicals Co., Ltd.: 5 parts by mass

[0111] · ALCON P100 manufactured by Arakawa Chemical Industry Co., Ltd.: 5 parts by mass.

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Abstract

Provided is a protective film capable of protecting and preserving an optical sheet surface, particularly the back surface of a prism sheet, independent of the shape and composition thereof in a rangeof adhesive forces appropriate for various adherends. A layered film having an adhesive layer having a styrene-based elastomer as the main component thereof on at least one surface of a base materiallayer, the layered film characterized in that the loss tangent tan [delta] and the shear storage modulus G' of the elastomer at 1 Hz in a temperature range of 30-60 degrees centigrade are within specific ranges.

Description

Technical field [0001] The present invention relates to a laminated film having an adhesive layer containing a styrene-based elastomer as a main component on at least one side of a base material layer. Specifically, the present invention relates to a laminated film that can protect and store various adherends in an appropriate adhesive force range regardless of the shape and composition of the back surface of the optical prism sheet. Background technique [0002] Products made of various raw materials such as synthetic resin, metal, and glass are often handled with surface protection materials attached to them to prevent scratches or stains from occurring during processing, transportation, and storage. . A representative material for protecting the surface is a protective film. Usually, a laminated film in which an adhesive layer is formed on a support base material is used, and the adhesive layer is attached to the adherend to cover it with the support base material, there...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/20C09J7/30C09J11/06B32B25/04C09J125/08G02B5/02
CPCC09J2203/318C09J2423/006C09J2453/00C09J7/30G02B5/0231B32B2307/542B32B25/14B32B2270/00B32B25/16B32B25/08B32B2307/54B32B27/32B32B2255/10B32B2307/412B32B2307/518B32B2255/26B32B7/12B32B2307/516B32B2307/748B32B27/18B32B2307/538B32B2457/208B32B7/06B32B2307/732B32B2571/00B32B2307/584B32B2457/202B32B27/36B32B2272/00B32B2551/00C09J7/20C09J11/06C09J125/08G02B5/02C09J2301/312B32B25/04C09J7/243B32B27/08B32B27/302
Inventor 町田哲也中道夏树井上则英田邨奈穗子松井良辅大仓正寿
Owner TORAY ADVANCED FILM CO LTD
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