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Surface protection film for optics with spacer

A surface protection film, optical technology, used in chemical instruments and methods, film/sheet release liners, film/sheet adhesives, etc., can solve product defects, poor wettability, and poor adhesion and other problems, to achieve the effect of less influence of pollution and excellent peelability

Active Publication Date: 2020-10-09
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, depending on the state of the surface of the optical component (adhered body) after peeling off the surface protective film, there is a problem that other layers are peeled off from the optical component due to poor wettability and adhesion to other layers, etc. product becomes defective

Method used

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  • Surface protection film for optics with spacer
  • Surface protection film for optics with spacer
  • Surface protection film for optics with spacer

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0140]

[0141] The above-mentioned (meth)acrylic polymer (A1) solution (about 35% by weight) was diluted to 29% by weight with ethyl acetate, and 100 parts by weight (solid content) of the (meth)acrylic polymer relative to the solution , 4 parts by weight of an isocyanurate body of hexamethylene diisocyanate (manufactured by Nippon Polyurethane Industry Co., Ltd., CORONATE HX), and dioctyltin laurate (manufactured by Tokyo Fine Chemicals, EMBILIZER OL-1) as a tin-based catalyst were added. 0.015 parts by weight and 0.69 parts by weight of acetylacetone, which is a compound that undergoes keto-enol tautomerization, were mixed and stirred for about 1 minute at around 25° C. to prepare an adhesive composition (1).

[0142]

[0143] Dissolve 100 parts by weight of a butyral resin (manufactured by Sekisui Chemical Industry Co., Ltd., S-lec KW-10) in 900 parts by weight of xylene (manufactured by Taiyo Chemical Industry Co., Ltd., Kishrol), and then add octadecyl isocyanate. (m...

Embodiment 2～8、 comparative example 1～3

[0156]

[0157] As shown in Tables 1 and 2, Examples 2 to 8 and The surface protection film for optics with a spacer of Comparative Examples 1-3. As Blank 1, an optical surface protection film not using a spacer was produced. In addition, as an iron catalyst, tris(acetylacetonate)iron (manufactured by Nippon Chemical Industry Co., Ltd., trade name "Naesem 2nd iron") was used.

[0158]

[0159] Hereinafter, specific compounding amounts and measurement and evaluation methods are described, and the results are described in Tables 1 and 2.

[0160]

[0161] The weight average molecular weight of the produced polymer was measured by GPC (gel permeation chromatography). Conditions are shown below.

[0162] Device: Tosoh Corporation, HLC-8220GPC

[0163] Sample column: manufactured by Tosoh Corporation, TSK guard column Super HZ-H (1 piece) + TSK gel Super HZM-H (2 pieces)

[0164] Reference column: manufactured by Tosohsha, TSK gel Super H-RC (1 piece)

[0165] Flow: 0.6...

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PUM

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Abstract

A surface protection film for optics with a spacer comprising a polyester film on one side of an adhesive layer and a spacer on the surface of the adhesive layer opposite to the polyester film. A surface protection film, wherein the Si-Kα ray intensity under fluorescent X-rays of the surface of the adhesive layer after the spacer is peeled off is 2.5 kcps or less, and the peeling force of the spacer to the surface protection film for optics is less than or equal to 100 kcps. The elongation speed is 0.3m / min and below 0.5N / 50mm. This surface protection film for optics with a spacer can prevent easy peeling of other layers such as an interlayer filler (layer) provided on the surface of an adherend after the surface protection film is peeled from the adherend.

Description

technical field [0001] The present invention relates to a surface protection film for optics with a spacer. [0002] The optical surface protection film with a spacer of the present invention is used for protecting glass, polarizing plate, wave plate, phase difference plate, optical compensation film, reflection sheet, brightness enhancement film, transparent conductive film, etc. used for liquid crystal displays, etc. It is useful as an optical surface protection film for the purpose of using on the surface of optical parts. Background technique [0003] Conventionally, for optical components, electronic components, etc., in order to prevent surface damage during processing, assembly, inspection, transportation, etc., a surface protection film is generally attached to the exposed surface of the component. The surface protection film is composed of a base film and an adhesive layer. If necessary, a spacer (also called a release film or release liner) (Patent Document 1). ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/36B32B27/00C09J7/30C09J7/20C09J133/04
CPCC09J7/255C09J7/40C09J11/04C09J11/08C09J133/066C09J2301/312
Inventor 三井数马野中崇弘林圭治
Owner NITTO DENKO CORP
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