Adhesive sheet

An adhesive sheet, adhesive technology, applied in the direction of adhesive types, ester copolymer adhesives, adhesives, etc.

Inactive Publication Date: 2013-10-23
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Therefore, an object of the present invention is to provide a PSA sheet having moderate adhesive strength without floating or peeling over time, excellent re-peelability, and handleability in order to solve the problems of conventional PSA sheets.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0289] [Preparation of binder solution]

[0290] The above-mentioned (meth)acryl-based polymer solution (40% by weight) was diluted to 20% by weight with ethyl acetate, and organopolysiloxane (KF -353, manufactured by Shin-Etsu Chemical Co., Ltd.) 2.1 parts by weight of a solution diluted to 10% with ethyl acetate (solid content: 0.21 parts by weight), lithium bis(trifluoromethane sulfone) acylate as an alkali metal salt of an antistatic agent Amine (LiN(CF 3 SO 2 ) 2 : LiTFSI, produced by Tokyo Chemical Industry Co., Ltd.), 6 parts by weight of a solution diluted to 1% with ethyl acetate (0.06 parts by weight of solid content), and the isocyanurate body of hexamethylene diisocyanate as a crosslinking agent (Japan Coronate HX manufactured by Polyurethane Industry Co., Ltd.) 1 part by weight (1 part by weight of solid content), 2 parts by weight of dibutyltin dilaurate (1 wt% ethyl acetate solution) as a crosslinking catalyst (0.02 part by weight of solid content), and Mix ...

Embodiment 2～9 and comparative example 1～4

[0294] Based on the compounding ratio of Table 1, it carried out similarly to Example 1, and produced the adhesive sheet. In addition, the compounding quantity in Table 1 shows solid content.

Embodiment 10

[0296] Furthermore, except having added 1 weight part of acrylic oligomers, based on the compounding ratio of Table 1 and Table 2, it carried out similarly to Example 1, and produced the adhesive sheet.

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Abstract

The present invention provides a pressure-sensitive adhesive sheet having an adequate adhesion so as not to cause blistering and peeling with the lapse of time and is excellent inre-peelingpropertyandworkability. The pressure-sensitive adhesive sheet provided is a pressure-sensitive adhesive sheet having a pressure-sensitive adhesive layer formed using a pressure-sensitive adhesive composition on one or both surfaces of a supporting film, in which the shift length after 30 minutes from a creep test carried out at 23°C and a shearing load of 500 g by bonding an adhesive area of 200 mm 2 of the pressure-sensitive adhesive layer to a TAC polarizing plate is 2.5 mm or less, and the adhesion at a peeling rate of 0.3 m / min after 30 minute-bonding of a pressure-sensitive adhesive surface of the pressure-sensitive adhesive layer to a TAC surface at 23°C is 0.3 N / 25 mm or less.

Description

technical field [0001] The present invention relates to an adhesive sheet. [0002] The pressure-sensitive adhesive sheet of the present invention is useful as a surface protection film used for the purpose of protecting the surface of optical components such as polarizing plates, wave plates, retardation plates, optical compensation films, reflection sheets, and brightness enhancement films used in liquid crystal displays and the like. . Background technique [0003] In recent years, when optical components and electronic components are transported and mounted on a printed circuit board, they are transferred in a state where each component is packaged with a predetermined sheet or in a state where an adhesive tape is attached. Among these, surface protection films are widely used in the field of optical and electronic components. [0004] A surface protection film is generally bonded to a protected body via an adhesive applied on the support film side, and is used for the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02C09J133/08C09J183/04G02B1/10B32B27/00B32B27/30C09J7/38C09J133/14G02B5/30
CPCC09J7/0207C09J133/062C09J2203/318C09J7/0217C09J2201/622C09J7/38C09J7/385Y10T428/2891Y10T428/2852Y10T428/28Y10T428/31663Y10T428/31938C09J2301/312C09J7/40C09J133/04G02B5/3025G02B5/305C09J2301/308C09J2301/302
Inventor 片冈贤一请井夏希天野立巳新美健二郎
Owner NITTO DENKO CORP
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