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Protective film and decorative protective film

A technology of protective film and decorative layer, applied in the direction of film/sheet-like adhesives, coatings, adhesives, etc., can solve the problems of thermal transfer printing adaptability research, thickness reduction, etc., to achieve suitable visual confirmation, The effect of reducing printing step difference and ensuring visual confirmation

Active Publication Date: 2017-05-24
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The protective film used in the display window of such an image display device, especially the protective film used for the touch panel, generally uses a protective film having a hard coat layer on both sides of the film substrate, but a protective film having a hard coat layer on both sides Not good for thickness reduction
In addition, when performing decorative printing on a protective film, the thermal transfer printing method is an advantageous method in terms of cost, but in a protective film having a hard coat layer on only one side, thermal transfer printing suitability has not yet been reviewed. fully researched

Method used

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  • Protective film and decorative protective film

Examples

Experimental program
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Effect test

Embodiment

[0081] The present invention will be described in more detail through examples and comparative examples below, but the present invention is not limited thereto.

Synthetic example 1）

[0083]

[0084] In a flask equipped with a stirrer, a gas conduit, a cooling pipe, and a thermometer, 250 parts by mass of butyl acetate, 206 parts by mass of norbornane diisocyanate (hereinafter referred to as NBDI.), 0.5 parts by mass of p-methoxyphenol, and 2 0.5 parts by mass of dibutyltin acetate, after heating up to 70°C while blowing air, dropwise add pentaerythritol triacrylate (hereinafter referred to as PE3A.) / pentaerythritol tetraacrylate (hereinafter referred to as PE4A.) mixture (mass ratio 75 / 25 mixture) 795 parts by mass. After the dropwise addition, react at 70°C for 3 hours, and further react until the 2250 cm of the isocyanate group -1 The infrared absorption spectrum disappears, and the polyfunctional urethane acrylate (A1) / PE4A mixture (mass ratio 80 / 20 mixture, 80 mass % butyl acetate solution of non-volatile components) containing alicyclic compounds is obtained. Here, the molecular weight (calculated value) of the urethane acrylate (A1) was 802.

Synthetic example 2）

[0086]

[0087] In a flask equipped with a stirrer, a gas conduit, a cooling pipe, and a thermometer, 254 parts by mass of butyl acetate, 222 parts by mass of isophorone diisocyanate (hereinafter referred to as IPDI), 0.5 parts by mass of p-methoxyphenol, 0.5 parts by mass of dibutyltin diacetate was heated to 70° C., and then 795 parts by mass of a PE3A / PE4A mixture (a mixture of mass ratio 75 / 25) was added dropwise over 1 hour. After the dropwise addition, react at 70°C for 3 hours, and further react until the 2250 cm of the isocyanate group -1 The infrared absorption spectrum disappears, and the polyfunctional urethane acrylate (A2) / PE4A mixture (mass ratio 80 / 20 mixture, non-volatile content 80 mass % butyl acetate solution) containing alicyclic compounds is obtained. Here, the molecular weight (calculated value) of the urethane acrylate (A2) was 818.

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Abstract

The present invention provides a protective film and a decorative protective film. The protective film has a hard coat layer only on one side of the film substrate, and can be decorated by thermal transfer printing or screen printing suitably. By forming a protective film as described below, it is possible to obtain a protective film for decoration that is excellent in printability in both the thermal transfer printing method and the screen printing method. The protective film used for the image display window has a hard coat layer on one side of the film base material, and the water contact angle of the surface of the film base material on the other side with the hard coat layer is 70 degrees or less.

Description

technical field [0001] The present invention relates to a protective film used for image display windows of image display devices such as liquid crystal panels and EL displays, and a decorative protective film obtained by decorating the protective film. Background technique [0002] A protective film for preventing damage and breakage of the image display device is provided on the image display window of an image display device such as a liquid crystal display device used in a mobile personal computer, an electronic notebook, a mobile phone and other small electronic terminals. In this protective film, a decorative layer may be provided on the back side for the purpose of improving designability or the like (see Patent Document 1). [0003] The protective film used in the display window of such an image display device, especially the protective film used for the touch panel, generally uses a protective film having a hard coat layer on both sides of the film substrate, but a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/02C09D4/02
CPCC08J5/18C08J7/04
Inventor 高桥佑辅渡边大亮桑下明弘
Owner DIC CORP
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