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surface protection film

A surface protection film, polyurethane-based technology, applied in the direction of film/sheet adhesive, polyurea/polyurethane adhesive, adhesive type, etc., can solve the problem that high adhesion rate and height difference tracking cannot be fully realized problems such as poor performance, to achieve the effects of excellent height difference followability, high adhesion rate, and excellent wettability

Active Publication Date: 2020-09-15
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, the conventional surface protection film having an adhesive layer containing a polyurethane-based adhesive has a problem in that it cannot follow the level difference when it is attached to an adherend with a large surface level difference, and cannot sufficiently achieve a high adhesion rate.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0244] As the polyol, PREMINOL S3011 (manufactured by Asahi Glass Co., Ltd., Mn=10000): 85 parts by weight, SANNIX GP-3000 (Sanyo Kasei Co., Ltd.) Co., Ltd., Mn=3000): 13 parts by weight, SANNIX GP-1000 (manufactured by Sanyo Chemical Co., Ltd., Mn=1000) which is a polyhydric alcohol having 3 OH groups: 2 parts by weight, compounded with polyfunctional isocyanate compound Functional alicyclic isocyanate compound CORONATE HX (Nippon Polyurethane Industry Co., Ltd.): 2.7 parts by weight, catalyst (manufactured by Nippon Chemical Industry Co., Ltd., trade name: Second iron): 0.04 parts by weight, Irganox 1010 (manufactured by BASF): 0.50 parts by weight, Elexcel AS110 (ionic liquid, manufactured by Daiichi Kogyo Pharmaceutical Co., Ltd.): 1.50 parts by weight, KF6004 (polyether-modified silicone, Shin-Etsu Kagaku Kogyo Co., Ltd.): 0.01 parts by weight, ethyl acetate as a diluting solvent: 241 parts by weight, and stirred with a disperser to obtain a polyurethane-based adhesive c...

Embodiment 2～8

[0249]As the polyfunctional isocyanate compound, the compounding amount of the polyfunctional alicyclic isocyanate compound CORONATE HX (Nippon Polyurethane Industry Co., Ltd.) was changed as shown in Table 1, except that it was carried out in the same manner as in Example 1, and obtained Surface protection films (2) to (8) of the diaphragm.

[0250] The results are shown in Table 1.

Embodiment 9～11

[0252] The compounding amount of the polyfunctional alicyclic isocyanate compound CORONATE HX (Nippon Polyurethane Industry Co., Ltd.) as the polyfunctional isocyanate compound was changed as shown in Table 2, and, as shown in Table 2, meat Isopropyl myristate (manufactured by Kao Corporation, trade name: EXEPARL IPM, Mn=270): 10 parts by weight, except that, it was carried out in the same manner as in Example 1 to obtain a surface protection film with a separator (9)~ (11).

[0253] The results are shown in Table 2.

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Abstract

The present invention provides a surface protection film that exhibits excellent wettability and cushioning properties and thus can adhere successfully even to a surface having a large step height. Also, the present invention provides an optical member and an electrical member, to which such surface protection films are adhered to. The surface protection film of the present invention includes an adhesive layer, wherein the adhesive layer is mainly composed of a polyurethane-based adhesive that contains a polyurethane-based resin, and shows an adhesion rate of 80% or more when attached with only its own weight to a surface having an arithmetical average illuminance, Ra, of 0.2-2 μm.

Description

technical field [0001] The present invention relates to surface protection films. The surface protection film of the present invention is a surface protection film containing an adhesive layer as an outermost layer, and the adhesive layer contains a polyurethane-based adhesive containing a polyurethane-based resin as a main component. The surface protective film of the present invention is suitably used for the surface protection of optical components or electronic components, for example. Background technique [0002] For optical parts or electronic parts, in order to prevent surface damage during processing, assembly, inspection, transportation, etc., a surface protective film is usually attached to the exposed side. Such a surface protection film is peeled off from an optical component or an electronic component when surface protection is unnecessary. [0003] For such a surface protection film, the same surface protection film is often used continuously from the manufa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/30C09J175/04
Inventor 佐佐木翔悟设乐浩司
Owner NITTO DENKO CORP
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