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Double-sided adhesive sheet and double-sided adhesive sheet manufacturing method

An adhesive sheet, double-sided technology, applied in the direction of polymer adhesive additives, film/sheet adhesives, adhesives, etc., can solve problems such as floating, and achieve the effect of simple manufacturing

Active Publication Date: 2016-11-16
LINTEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the adhesive laminate of the double-sided adhesive sheet is thin, there is a problem that the above-mentioned floating is likely to occur.

Method used

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  • Double-sided adhesive sheet and double-sided adhesive sheet manufacturing method
  • Double-sided adhesive sheet and double-sided adhesive sheet manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] 1. Preparation of (meth)acrylate polymer

[0095] A (meth)acrylate polymer was prepared by copolymerizing 97 parts by mass of n-butyl acrylate, 1 part by mass of acrylic acid, 0.5 parts by mass of 2-hydroxyethyl acrylate, and 3 parts by mass of vinyl acetate. When the molecular weight of this (meth)acrylate polymer was measured by the method mentioned later, the weight average molecular weight (Mw) was 1 million.

[0096] 2. Preparation of Adhesive

[0097] 100 parts by mass of the (meth)acrylate polymer obtained in the above step 1 (value in terms of solid content; the same applies hereinafter), trimethylolpropane-modified toluene diisocyanate (Nippon Polyurethane Co. , Ltd., trade name "Coronate L") 1 part by mass, 30 parts by mass of polymerized rosin ester (manufactured by Harima Chemicals Inc., trade name "HARITACK FK100") as a tackifier, and aromatic petroleum as a tackifier 20 parts by mass of resin (manufactured by Mitsui Chemicals, Inc., trade name "FTR6100")...

Embodiment 2

[0105] Using a knife coater, the adhesive coating solution obtained in step 2 of Example 1 was applied to the substrate in the laminate obtained in step 3 of Example 1 so that the thickness after drying became 2 μm. After that, the other side (exposed side) was heat-treated at 90° C. for 1 minute to form a second pressure-sensitive adhesive layer.

[0106] With respect to the formed 2nd pressure-sensitive adhesive layer, the same 2nd release sheet as in Example 1 was bonded and laminated in such a manner that the release-treated surface was in contact with the 2nd pressure-sensitive adhesive layer, thereby obtaining the A double-sided adhesive sheet consisting of 1 release sheet / first adhesive layer / substrate / second adhesive layer / second release sheet.

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PUM

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Abstract

A double-sided adhesive sheet (1) is provided with: an adhesive laminated body, that is provided with a base material (20), a first adhesive layer (21) laminated on one surface of the base material (20), and a second adhesive layer (22) laminated on the other surface of the base material (1); a first peeling sheet (31) laminated on the first adhesive layer (21) surface on the reverse side of the base material (20); and a second peeling sheet (32) laminated on the second adhesive layer (21) surface on the reverse side of the base material (20). In the double-sided adhesive sheet (1), the thickness of the base material (20) is 1-5 Mum, the thicknesses of the first adhesive layer (21) and the second adhesive layer (22) are 1-5 Mum, respectively, peeling forces of the first peeling sheet (31) and the second peeling sheet (32) are 10-30 mN / 25 mm, respectively, and a difference between the peeling force of the first peeling sheet (31) and the peeling force of the second peeling sheet (32) is equal to or less than 5 mN / 25 mm.

Description

technical field [0001] The invention relates to a double-sided adhesive sheet and a method for manufacturing the double-sided adhesive sheet. Background technique [0002] In general, a double-sided PSA sheet has a structure in which a laminate (adhesive laminate) with a substrate interposed between two PSA layers is sandwiched between two release sheets. material (core material). In this double-sided adhesive sheet, one of the two release sheets is set as a light release type release sheet with a low release force, and the other is used as a heavy release type release sheet with a high release force (refer to Patent Document 1). [0003] When using the above-mentioned double-sided pressure-sensitive adhesive sheet, first, the light-release type release sheet is peeled off, and after the exposed adhesive layer is attached to an adherend, the heavy-release type release sheet is peeled off. Thereby, when one release sheet is peeled off, it is possible to prevent so-called l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02C09J11/08C09J133/00C09J7/38
CPCC09J133/066C08G18/6229C08G18/6254C08G18/672C08G18/8029C09D175/04C09J2433/00C09J7/38C09J7/385C09J2301/124C08F220/1804C08F218/08C08F220/20C08F220/06C09J7/20C09J7/405C09J2301/312C09J2301/40
Inventor 仓田雄一安斋刚史大桥仁
Owner LINTEC CORP
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