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Surface protection film, method for producing surface protection film, and optical member

A technology for protecting films and touch panels, applied to film/sheet-shaped adhesives, conductive paints, coatings, etc., can solve problems such as insufficient wettability, defective products, and poor wettability, and achieve Excellent wettability, excellent workability, and good stability over time

Active Publication Date: 2020-10-16
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Depending on the state of the surface of the adherend after peeling off the surface protection film, the wettability to other layers may be poor. Due to such reasons, there may be fears that the expected functions of other layers may not be exhibited or the product may be defective.
Specifically, when other layers such as a layer having a touch panel function are provided on the surface of the polarizing plate, after peeling off the surface protection film provided to protect the surface of the polarizing plate (for example, a polarizing plate whose surface layer is a hard coat layer, etc.), When an interlayer filler is applied between another layer and the surface of the polarizing plate to provide a transparent layer, the wettability of the surface of the polarizing plate to the interlayer filler may not be sufficient

Method used

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  • Surface protection film, method for producing surface protection film, and optical member
  • Surface protection film, method for producing surface protection film, and optical member
  • Surface protection film, method for producing surface protection film, and optical member

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0262] [Preparation of Acrylic Binder Solution]

[0263] The aforementioned (meth)acrylic polymer (A) solution (40% by weight) was diluted to 20% by weight with ethyl acetate, and 500 parts by mass of the solution (100 parts by mass of solid content) was added as a crosslinking agent. 3 parts by mass (3 parts by mass of solid content) of the isocyanurate form of hexamethylene diisocyanate (manufactured by Nippon Polyurethane Industry Co., Ltd., Coronate HX), dibutyltin dilaurate (trade name: OL- 1. Tokyo Fine Chemical Co., Ltd.) (1% by mass of ethyl acetate solution) 3 parts by mass (0.03 parts by mass of solid content), as a crosslinking retarder, 3 parts by mass with respect to 100 parts by mass of the solvent (when converted) Acetylacetone and 0.05 parts by mass of polyethylene glycol (trade name: PEG400, number average molecular weight: 400, manufactured by Sanyo Kasei) as a polyether compound were mixed and stirred to prepare an acrylic adhesive solution.

[0264] [Produ...

Embodiment 2～10 and comparative example 1～4

[0267] Based on the compounding contents of Tables 1 to 3, a surface protection film was produced in the same manner as in Example 1.

[0268] Table 4 and Table 5 show the results of the above-mentioned various measurements and evaluations for the surface protection films of Examples and Comparative Examples.

[0269] The abbreviations in Table 1 and Table 3 are explained below.

[0270] 2EHA: 2-Ethylhexyl Acrylate

[0271] HEA: 2-Hydroxyethyl Acrylate

[0272] 4HBA: 4-Hydroxybutyl Acrylate

[0273] AA: Acrylic

[0274] ADEKA Pluronic 25R-1: Polyoxyethylene-polyoxypropylene block copolymer (manufactured by ADEKA, polyether compound)

[0275] Surfynol 420: Polyether compound of 2,4,7,9-tetramethyl-5-decyne-4,7-diol (manufactured by Nissin Chemical Co., Ltd., polyether compound)

[0276] Surfynol 485: Polyether compound of 2,4,7,9-tetramethyl-5-decyne-4,7-diol (manufactured by Nissin Chemical Co., Ltd., polyether compound)

[0277] Aqualon HS-10: Polyoxyethylene nonylprope...

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Abstract

This invention provides a surface protective film for a touch control panel, a method for manufacturing the surface protective film and an optical member. The surface protective film is good in anti-static performance, ageing stability of static voltage stripping, and is capable of carrying out operation confirmation of the touch control panel, and the surface of a pasted object after the surface protective film is stripped off is good in wettability of an interlayer filler. The surface protective film used for the touch control panel is characterized by comprising base material with a first surface and a second surface, an anti-static layer arranged on the first surface of the base material, and an adhesive layer formed by an adhesive composition and arranged on the second surface of the base material. The anti-static layer is formed by an anti-static composition containing polyaniline sulfonic acid serving as a conductive polymer component, polyester resin serving as the adhesive and an isocyanate crosslinking agent serving as a crosslinking agent, wherein the adhesive composition contains (meth)acrylic polymers and polyether compounds, and 0.03-14 mass parts of polyether compounds in relation to 100 mass parts of the (meth)acrylic polymer.

Description

technical field [0001] The present invention relates to a surface protection film for a touch panel, a method for producing the surface protection film, and an optical member mounted on a touch panel. Background technique [0002] A surface protection film generally has a structure in which an adhesive layer is provided on a film-like substrate (support). The protective film is used for bonding to an adherend (protected object) via the adhesive layer, thereby protecting the adherend from scratches or stains during processing, transportation, and the like. [0003] For example, a touch panel of a liquid crystal display is formed by bonding an optical member such as a polarizing plate or a wavelength plate to a liquid crystal cell through an adhesive layer. In the manufacture of the liquid crystal display panel, the polarizing plate bonded with the liquid crystal cell is firstly manufactured into a roll form, then unwound from the roll, and cut into a required size according ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/30C09J7/25C09J133/00C09J11/08C08J7/04C09D5/24C09D175/04C09D179/02C09D7/63C08L67/02
Inventor 渡部奈津子片冈贤一天野立巳
Owner NITTO DENKO CORP