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double sided adhesive tape

A double-sided adhesive tape and adhesive layer technology, applied in the direction of adhesive types, ester copolymer adhesives, film/sheet adhesives, etc., can solve the problem of difficult to obtain waterproof, uneven tracking Resilience (deterioration of height difference followability, water resistance problems, etc., to achieve the effect of excellent re-peelability and thin total thickness

Inactive Publication Date: 2011-12-07
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the base double-sided pressure-sensitive adhesive tape using non-woven fabric or paper as the base material has a problem in water resistance because these materials are impregnated with water.
In addition, for double-sided adhesive tapes using plastic films as base materials, due to the rigidity of plastic films, the followability to unevenness (level difference followability) is poor, and there are problems such as warping of the level difference, which is difficult to obtain. good water resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0201] In a reaction vessel with a condenser tube, a nitrogen inlet tube, a thermometer, a dropping funnel, and a stirring device, add 69 parts by weight of toluene, 163 parts by weight of ethyl acetate as a solvent, 80 parts by weight of butyl acrylate, 2-ethyl acrylic acid 20 parts by weight of hexyl ester, 3 parts by weight of acrylic acid, 5 parts by weight of vinyl acetate, 0.1 part by weight of 2-hydroxyethyl acrylate, and 0.2 parts by weight of 2,2-azobisisobutyronitrile as initiators, in a nitrogen stream Polymerization was carried out at 60° C. for 6 hours to obtain a solution of an acrylic polymer.

[0202] In this solution, 30 parts by weight of a polymerized rosin ester resin (softening point: 123°C) and 1.5 parts by weight (in terms of solid content) of an isocyanate crosslinking agent (trade name " Coronet L", manufactured by Nippon Polyurethane Industry Co., Ltd.) to obtain an acrylic adhesive composition.

[0203] This acrylic pressure-sensitive adhesive compo...

Embodiment 2

[0206] In addition to using a PET base material (non-bubble structure, thickness: 12 μm, trade name “Lumira S-10#12”, manufactured by Toray Co., Ltd.) instead of a PET base material (bubble-free structure, thickness: 5 μm, trade name “Lumira-S-10#12”) #5AF53 ", manufactured by Toray Co., Ltd.), in the same manner as in Example 1, an adhesive layer (adhesive layer on the surface layer on the side of the foam layer) / foam layer / adhesive layer / reinforcing layer / double-sided adhesive tape (total thickness: 187 μm) of the adhesive layer (adhesive layer of the reinforcing layer side surface layer).

Embodiment 3

[0208] In addition to using a foam (trade name "ボラ一ラ XL-HN#03001Wシヨヨリクロ", manufactured by Sekisui Chemical Industry Co., Ltd., thickness: 100 μm, average cell diameter: 163 μm, density: 0.34 g / cc) as the foam, And use PET base material (non-bubble structure, thickness: 25 μ m, trade name " ルミラ-S-10#25 ", manufactured by Toray Co., Ltd.) instead of PET base material (no-bubble structure, thickness: 5 μm, trade name "ルミラ-S-10#25", trade name "ルミラ-S-10#25" #5AF53 ", manufactured by Toray Co., Ltd.), in the same manner as in Example 1, an adhesive layer (adhesive layer on the surface layer on the side of the foam layer) / foam layer / adhesive layer / reinforcing layer / double-sided adhesive tape (total thickness: 200 μm) of the adhesive layer (adhesive layer of the reinforcing layer side surface layer).

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Abstract

The present invention provides a double-sided pressure-sensitive adhesive tape having a thin overall thickness, having a foam layer, and excellent removability. The double-sided adhesive tape of the present invention is characterized in that it has a total thickness of 500 μm or less, has a foam layer, a reinforcing layer, and an adhesive layer as two surface layers, and the adhesive layer of at least one surface layer is composed of An adhesive composition formed of an acrylic polymer, a tackifying resin and a crosslinking agent, the acrylic polymer is formed of a (meth)acrylic acid alkyl group having a straight chain or branched chain alkyl group with 4 to 9 carbon atoms Esters are constituted as essential monomer components.

Description

technical field [0001] The present invention relates to double-sided adhesive tapes. More specifically, the present invention relates to a double-sided pressure-sensitive adhesive tape having a thin thickness, having a foam layer, and excellent removability. Background technique [0002] Conventionally, double-sided adhesive tapes (double-sided pressure-sensitive adhesive tapes) with substrates provided with adhesive layers (pressure-sensitive adhesive layers) on both sides of the substrate have been used as highly reliable bonding means or fixing means. various industries. For example, for mounting of components and joining between components. [0003] As such a double-sided adhesive tape with a base material, for example, a double-sided adhesive tape using a nonwoven fabric as a base material (Patent Document 1), a double-sided adhesive tape using paper as a base material, and a double-sided adhesive tape using a plastic film are known. Double-sided adhesive tape as sub...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02C09J133/06C09J7/29
CPCC09J7/0217C09J2201/128C09J7/385C09J7/26C09J7/29C09J2301/308C09J2301/124C09J7/40C09J9/00C09J133/04C09J2400/243
Inventor 中山直树田村彰规
Owner NITTO DENKO CORP
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