Surface protection film for flexible display

A surface protection film and display technology, which is applied in the direction of instruments, chemical instruments and methods, film/sheet adhesives, etc., can solve the problems of surface protection film peeling off from the display surface, high force, etc., and achieve good pen feel, Excellent handling properties and excellent self-healing properties

Active Publication Date: 2021-07-23
BANDO CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When a conventional surface protection film is attached to an electronic device using such a flexible display, the surface protection films that come into contact during storage will stick to each other, and a large force is required to open the display, and the surface protection film New problems such as direct peeling from the display surface in the attached state

Method used

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  • Surface protection film for flexible display
  • Surface protection film for flexible display
  • Surface protection film for flexible display

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0122] Add 7.6 g of 1,4-butanediol and trimethylolpropane to 53.8 g of Polycarbonate diol (manufactured by Tosoh Co., Ltd., trade name: Nippollan 965) 1.9 g, 36.7 g of isophorone diisocyanate (IPDI), and 50 ppm of an organotin compound were stirred and mixed to prepare a material composition.

[0123] A silicon-treated PET film with a thickness of 125 μm was used as the first gap maintaining member and the second gap maintaining member, and a surface protection film laminate having a protective layer with a thickness of 150 μm was produced by the above production method.

Embodiment 2

[0125] Add 5.58 g of 1,4-butanediol, 3.68 g of trimethylolpropane, and 1,4-butanediol to 56.7 g of polycarbonate diol (manufactured by Tosoh Co., Ltd., trade name: Nippollan 965). A surface protection film laminate was obtained in the same manner as in Example 1 except that 34.0 g of norbornene diisocyanate (NBDI) and 50 ppm of an organotin compound were stirred and mixed to obtain a material composition.

Embodiment 3

[0127] 5.7 g of 1,4-butanediol, 3.8 g of trimethylolpropane, and IPDI were added to 53.8 g of polycarbonate diol (manufactured by Tosoh Co., Ltd., trade name: Nippollan 965) 36.7 g and 50 ppm of an organotin compound were stirred and mixed to obtain a material composition, and a surface protection film laminate was obtained in the same manner as in Example 1.

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Abstract

The present invention addresses the problem of providing a surface protection film for a flexible display with which films are not adhered to each other. As a solution, provided is the surface protection film for a flexible display that has a protection layer made of polyurethane as an outermost surface thereof, the polyurethane having a tan [delta] peak temperature of 20 DEG C or more.

Description

technical field [0001] The invention relates to a surface protection film for a transparent substrate used to protect the surface of a flexible display. Background technique [0002] In electronic devices equipped with displays such as smartphones, tablet personal computers (PCs), and portable music players, a surface protection film may be attached to protect the transparent substrate on the surface of the display. Translucency, non-coloring properties, weather resistance, plasticizer resistance, antifouling properties, etc. are required for the surface protection film. In addition, since electronic devices equipped with displays that operate through capacitive touch panels are common, new requirements are placed on the surface protection film for the pen movement feeling, operability, scratch resistance of the stylus, and the ability of the stylus to be pressed in by the front end of the stylus. The self-healing property of the film returning to its original state with th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/40
CPCB32B27/40C09J7/30C09J2203/318C09J2475/00C09J7/10C09J175/04C08G18/755C08G18/758C08G18/44C08G18/6644C08G18/246C09D175/04B29C43/28B29C43/24B29C43/305B29K2075/00C08J5/18C09J7/25G09F9/301C08J2375/06B32B7/06B32B27/08C08J5/128
Inventor 鎌田穣山口昌大
Owner BANDO CHEM IND LTD
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