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Release sheet and adhesive material

A technology of peeling sheet and peeling agent layer, which is applied in the direction of adhesive products, film/sheet adhesives, adhesives, etc., can solve the problems of difficulty in deployment, static electricity, sparks, etc. Compatibility effect

Inactive Publication Date: 2010-10-20
LINTEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, release sheets using polyolefin release agents have the problem of being prone to static electricity on them
For example, usually the release sheet is rolled into a roll form and then stored before being bonded to the pressure-sensitive adhesive sheet, but sparks are generated when it is unrolled from the roll, or the release sheet itself is self-destructing. Bonding makes it difficult to unroll

Method used

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  • Release sheet and adhesive material
  • Release sheet and adhesive material
  • Release sheet and adhesive material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] By mixing 70 parts by weight of low-density polyethylene (trade name: Novatec LD LC605Y, manufactured by Japan Polyethylene Corp.) with a density of 0.918 g / cm3 and 30 parts by weight of an antistatic agent of polyether-polypropylene block copolymer ( Trade name: Pelestat 230, manufactured by Sanyo Chemical Industries, Ltd.) The undercoat composition obtained was melted, then extruded and coated at a temperature of 320° C. on a general-purpose PET film with a thickness of 38 μm (trade name : Lumirror S-28 manufactured by Toray Industries Inc.) to form an undercoat layer with a thickness of 15 μm. Next, by mixing 70 parts by weight of an ethylene-1-butene copolymer (trade name: Excellen EUL731, manufactured by Sumitomo Chemical Co., Ltd) with a density of 0.895 g / cm3 and 30 parts by weight with a density of 0.918 g / cm3 A release agent composition obtained from low-density polyethylene (trade name: Novatec LD LC604, manufactured by JapanPolyethylene Corp.) was extruded an...

Embodiment 2

[0043] The step of embodiment 2 is similar to embodiment 1, different is the mixture resin obtained by mixing 50 parts by weight of low-density polyethylene (trade name: Novatec LD LC605Y) and 50 parts by weight of antistatic agent (trade name: Pelestat 230) Basecoat composition for release sheets.

Embodiment 3

[0045] The step of embodiment 3 is similar to embodiment 1, and difference is that by mixing 50 parts by weight density is the low-density polyethylene (trade name: Novatec LDLC800, manufactured by Japan Polyethylene Corp.) and 50 parts by weight A mixture resin obtained from an ethylene-propylene copolymer (trade name: Tafmer P0280G, manufactured by Mitsui Chemical Inc.) having a density of 0.870 g / cm3 was used as a release agent composition for a release sheet.

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Abstract

The electrification of a release sheet is prevented, and the workability of unrolling of the release sheet from a roll is improved. A release sheet (10) comprises a release sheet base material (11), an undercoat layer (12) formed on the release sheet base material (11), and a release agent layer (13) formed on the undercoat layer (12). The undercoat layer (12) contains a polyolefin-type antistatic agent having a surface intrinsic resistivity value (ASTM D 257) of not more than 109 O. The surface resistivity (JIS K 6911) of the release sheet (10) is not more than 1014 Omega.

Description

technical field [0001] The present invention relates to a release sheet whose primer layer contains an antistatic agent, and in particular to a release sheet used in applications such as name tag labels or low outgassing tapes for precision electronic equipment such as hard disk drives. Background technique [0002] A release sheet for a pressure-sensitive adhesive tape is constituted by laminating a release agent layer on a base sheet, and a silicone release agent is generally used for the release agent layer. As for the silicone release agent, although its release performance is excellent, part of the low-molecular-weight silicone compound can be transferred to the pressure-sensitive adhesive, thereby causing the adherend on which the pressure-sensitive adhesive tape is adhered to be damaged. Silicone compound contamination. Thus, when the pressure sensitive sheet is used for applications secured to electronic devices such as hard disk drives, silicone contamination can c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/18C09J7/02C09K3/16C09J7/40
CPCC09J2423/005C09J2453/005B32B27/08B32B27/18B32B3/30B32B27/28B32B27/32C09J7/0225B32B7/06B32B7/12B32B27/10B32B27/285B32B2270/00B32B2307/21B32B2307/50B32B2307/538B32B2307/72B32B2307/748B32B2405/00C09J7/40Y10T428/1452Y10T428/31938
Inventor 别府史织田矢直纪杉崎俊夫
Owner LINTEC CORP
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