Protective sheet for glass etching

A protection sheet and etching technology, which is applied in glass molding, glass manufacturing equipment, film/sheet adhesive, etc., can solve the problems of glass surface protection sheet breakage, ITO film damage, failure to reach, etc.

Inactive Publication Date: 2014-06-04
NITTO DENKO CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned method has not reached the degree of reliably preventing the etchant from swelling in the thickness direction of the glass substrate, or the end face of the glass surface protection sheet from the interface between the adhesive and the glass substrate. Problems such as etching a part to destroy the ITO film, FPC, or eroding a part that does not require etching
In addition, when an adhesive with high adhesion is used to prevent the etchant from penetrating into the interface between the adhesive and the glass substrate, the glass surface protection sheet itself will be damaged when the glass surface protection sheet is peeled off after etching treatment. Problems such as breakage, contamination of the adherend glass with adhesive (so-called adhesive residue), and destruction of the ITO film on the surface of the glass substrate due to heavy peeling

Method used

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  • Protective sheet for glass etching
  • Protective sheet for glass etching
  • Protective sheet for glass etching

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0261]Use PE film as the base material to make the protective sheet. Low-density polyethylene (manufactured by Tosoh Corporation, trade name “Petrothene 180”) was formed into a film with a thickness of 100 μm by an inflation molding machine at a mold temperature of 160° C., and corona discharge treatment was performed on one side to produce a PE film. The acrylic adhesive composition a was coated on the corona-treated surface of the film, and dried at 80° C. for 1 minute to form an adhesive layer with a thickness of 3 μm. Furthermore, this pressure-sensitive adhesive layer was bonded to the non-corona-treated surface of the same film, and it aged at 50 degreeC for 2 days, and produced the protective sheet.

[0262] In addition, what was manufactured by the following method was used as said acrylic pressure-sensitive adhesive composition a. 100 parts of 2-ethylhexyl acrylate, 80 parts of vinyl acetate, 5 parts of acrylic acid, and 0.3 parts of benzene peroxide as a polymerizat...

Embodiment 2

[0264] As a cross-linking agent, 4 parts of epoxy-based cross-linking agent (manufactured by Mitsubishi Gas Chemical Co., Ltd. "TETRAD (registered trademark)-C") was added (in other words, the amount of epoxy-based cross-linking agent was set to 2 parts). Except having formed so that the thickness of the mixture layer might become 10 micrometers, it carried out similarly to Example 1, and produced the protective sheet.

Embodiment 3

[0266] The same substrate as in Example 1 was formed into a film with a thickness of 150 μm (in other words, the thickness of the substrate was made 150 μm, and the substrate was formed into a film in the same manner as in Example 1), and the thickness of the adhesive layer was The acrylic pressure-sensitive adhesive composition b was applied to a thickness of 10 μm to prepare a protective sheet. As the acrylic pressure-sensitive adhesive composition b, what was produced by the following method was used. 100 parts of 2-ethylhexyl acrylate, 80 parts of vinyl acetate, 5 parts of acrylic acid, and 0.3 parts of benzene peroxide as a polymerization initiator were prepared in a reaction vessel equipped with a condenser tube, a nitrogen inlet tube, a thermometer, and a stirring device. Formyl (BPO, "NYPER (registered trademark) BW" manufactured by NOF Corporation) was copolymerized in toluene blended so as to have a desired solid content to obtain an acrylic copolymer. Further, 20 p...

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Abstract

This invention provides a protective sheet for glass etching, having excellent etching solution penetration resistance, non-contaminating property and peeling efficiency. The protective sheet comprises a substrate and a PSA layer provided on one face of the substrate, such that, when the protective sheet is adhered to a non-etching area when etching glass, it protects the non-etching area from an etching solution. The PSA layer is constituted with a PSA having a gel fraction of 60% or higher. The PSA is an acrylic PSA comprising an acrylic polymer as a primary component. The acrylic polymer is synthesized by polymerizing starting monomers comprising, as a primary monomer, a monomer represented by a formula: CH2-CR1COOR2 (R1 is a hydrogen atom or a methyl group, and R2 is an alkyl group). The primary monomer comprises as a primary component a monomer with R2 being an alkyl group having 6 or more carbons.

Description

technical field [0001] The present invention relates to a protective sheet for glass etching. More specifically, it relates to glass etching for masking a portion where the influence of the etching solution is to be eliminated when the surface of glass is etched (etched) with an etching solution such as a hydrofluoric acid solution. Use a protective sheet. Moreover, it is related with the protective sheet for glass etching which shields the surface of glass when etching the side surface of glass with etchant liquids, such as a hydrofluoric-acid solution, in more detail. This application claims priority based on Japanese Patent Application No. 2011-159781 filed on July 21, 2011 and Japanese Patent Application No. 2012-33241 filed on February 17, 2012, and the entire contents of these applications are incorporated as Incorporated by reference into this specification. Background technique [0002] In the glass processing step, grinding is performed in order to remove burrs fo...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C09J7/02C09J133/06
CPCC09J2201/122C09J133/08C09J7/0217C09J2433/00C09J2201/622C03B19/00C03C15/00C08K5/29C09J133/06C09J2205/102C08K5/0025C08K5/1515C09J7/385C09J2301/122C09J2301/312C09J2301/408C08F220/1808C08F218/08C08F220/06
Inventor早田真生子川西道朗袁渝涵方仁骏
OwnerNITTO DENKO CORP