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Adhesive sheet

An adhesive sheet and adhesive technology, applied in the directions of polyether adhesives, conductive adhesives, adhesive types, etc., can solve the problems of decreased inspection accuracy of adherends, and achieve excellent appearance characteristics and scratch resistance. Excellent rubbing and antistatic properties, and whitening suppression effect

Active Publication Date: 2013-12-25
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is because when the surface of the surface protection film (substrate surface) is scratched, the appearance inspection of the adherend is carried out with the surface protection film attached to the adherend (optical member, etc.) , it is difficult to judge whether the detected scratches exist on the surface protection film or on the adherend, and the inspection accuracy of the adherend decreases.

Method used

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  • Adhesive sheet
  • Adhesive sheet
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Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0209] Manufacturing example 1 [Manufacturing example of transparent film substrate]

[0210] (Preparation of a composition for forming a top coat layer)

[0211] Charge 25g of toluene into the reactor, raise the temperature inside the reactor to 105°C, then add 30g of methyl methacrylate (MMA) and 10g of n-butyl acrylate (BA) dropwise to the above reactor continuously in 2 hours. ), 5g cyclohexyl methacrylate (CHMA), 0.2g azobisisobutyronitrile mixed solution. After completion of the dropwise addition, the temperature in the reactor was adjusted to 110 to 115°C, and the same temperature was maintained for 3 hours to carry out a copolymerization reaction. After 3 hours, a mixed solution of 4 g of toluene and 0.1 g of azobisisobutyronitrile was dropped into the reactor, and the same temperature was maintained for 1 hour. Then, the temperature in the reactor was cooled to 90°C, and toluene was added to adjust the NV to 5% by weight, and an acrylic polymer containing 5% by weig...

manufacture example 2

[0215] Manufacturing example 2 [Manufacturing example of transparent film substrate]

[0216] In Production Example 1, the amount of conductive polymer solution 1 used was changed from 1.2 g to 2.5 g, and the amount of ethylene glycol monomethyl ether used was changed from 55 g to 17 g. In addition, the solution for forming a top coat layer was applied so that the thickness after drying was about 20 nm. Otherwise, it carried out similarly to Production Example 1, and produced the transparent film base material (it may also be called "substrate 2") which has a transparent top coat layer on one side of a PET film.

manufacture example 3

[0217] Manufacturing example 3 [Manufacturing example of transparent film substrate]

[0218] In Production Example 1, the amount of ethylene glycol monoethyl ether used was changed from 40 g to 19 g, the amount of conductive polymer solution 1 used was changed from 1.2 g to 0.7 g, and ethylene glycol monomethyl ether was not used. In addition, the solution for forming a top coat layer was applied so that the thickness after drying was about 40 nm. Otherwise, it carried out similarly to the manufacture example 1, and produced the transparent film base material (it may also be called "substrate 3") which has a transparent top coat layer on one side of a PET film.

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PUM

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Abstract

Provided is a removable adhesive sheet that is highly scratch-resistant, is resistant to whitening (moisture-absorption whitening) when stored in humid conditions, and has excellent appearance characteristics and antistatic performance. Said pressure-sensitive adhesive sheet has an acrylic adhesive layer on at least one surface of a transparent film substrate and is characterized in that: said transparent film substrate has a base layer comprising a resin material and a top-coat layer provided on a first surface of said base layer; said top-coat layer comprises a polythiophene, an acrylic resin, and a melamine cross-linker, with the average thickness (Dave) of said top-coat layer being 2 to 50 nm and the amount of variation ([delta]D) in said thickness being no more than 40%; and the aforementioned acrylic adhesive layer is formed from a water-dispersed acrylic removable adhesive composition containing an acrylic emulsion polymer that is polymerized using a reactive emulsifier containing a radical-polymerizable functional group and comprises feedstock monomers including an alkyl (meth)acrylate ester (A) and a carboxyl-group-containing unsaturated monomer (B), with said alkyl (meth)acrylate ester (A) constituting 70% to 99.5% and said carboxyl-group-containing unsaturated monomer (B) constituting 0.5% to 10% of the total weight of the feedstock monomers.

Description

technical field [0001] The present invention relates to a re-peelable adhesive sheet. Specifically, the present invention relates to a re-peelable adhesive sheet that has excellent appearance characteristics and can suppress whitening under humidified storage, and is excellent in scratch resistance and antistatic properties. Background technique [0002] In the manufacturing and processing of optical members (optical materials) represented by optical films such as polarizing plates, retardation plates, and anti-reflective plates, the surface The protective film is pasted on the surface of the optical member and used (see Patent Documents 1 and 2). As these surface protection films, generally used are releasable pressure-sensitive adhesive sheets in which a releasable pressure-sensitive adhesive layer is provided on the surface of a plastic film substrate. ; [0003] Conventionally, in the use of these surface protection films, solvent-based acrylic adhesives have been use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02C09J9/02C09J11/06C09J133/08C09J171/02C09J165/00C09J7/29
CPCC09J165/00C08G2261/135C08G2261/1424C08G2261/3223C08G2261/51C08G2261/76C08G2261/794C09J133/02C08K5/0025C08K5/34922C09J2203/318C09J2433/00C09J2433/006C09J2465/006C09J2467/006C09D133/12C08G2650/58C09J7/38C09J7/22C09J7/29C08L25/18C08L33/08Y10T428/2848Y10T428/24612Y10T428/265C09J2301/162C08L25/04C08L65/00C08F220/1808C08F220/06C08F216/1433C08F220/14C08F220/1804C08F220/1806C08F220/20C09J2301/30C09J11/00C09J7/385G02B1/16G02B1/14
Inventor 天野立巳森本有三井数马米崎幸介高岛杏子
Owner NITTO DENKO CORP
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