Adhesive protective film, screen panel, and portable electronic terminal

A technology of adhesive layer and hard coating film, applied in the direction of adhesives, adhesive types, polyurea/polyurethane adhesives, etc., can solve problems such as insufficient research, achieve suitable adhesion and peelability, reduce The effect of increasing the small peeling force and alleviating the sagging of the film

Active Publication Date: 2013-12-25
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of the above-mentioned protective adhesive film, the peeling performance has not been sufficiently studied.

Method used

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  • Adhesive protective film, screen panel, and portable electronic terminal
  • Adhesive protective film, screen panel, and portable electronic terminal
  • Adhesive protective film, screen panel, and portable electronic terminal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0150] On one side of a polyethylene terephthalate film (Cosmoshine A4300 manufactured by Toyobo Co., Ltd.) with a thickness of 100 μm, the hard coating agent (1) configured above was coated, dried at 60° C. for 90 seconds, and then air-coated. Under the atmosphere, use an ultraviolet irradiation device ("F450" manufactured by Fusion Ultraviolet System, Japan Co., Ltd., lamp: 120W / cm, H bulb) to irradiate with a light intensity of 0.5J / cm 2 Ultraviolet rays were irradiated to form a hard coat layer with a thickness of 10 μm. Next, the non-hard-coated surface was surface-treated with a corona treatment apparatus so that the surface tension would be 55 dyne / cm, and a hard-coat film was obtained. After adhering the adhesive layer (1) to the corona-treated surface of the hard coat film with a pressure of 4 kg / cm, it aged at 40° C. for 2 days to obtain a protective adhesive film with a thickness of 120 μm.

Embodiment 2

[0152] After adhering the adhesive layer (2) to the corona-treated surface of the hard coat film (1) with a pressure of 4 kg / cm, it was aged at 40° C. for 2 days to obtain a protective adhesive film with a thickness of 120 μm.

Embodiment 3

[0154] A protective adhesive film with a thickness of 92 μm was obtained in the same manner as in Example (1) except that the hard coat layer thickness of the hard coat film (1) was 7 μm and the PET film thickness was 75 μm.

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Abstract

Provided is an adhesive protective film having a hard coat film having a Martens hardness at the surface of 240 to 300 N / mm 2 , and an adhesive layer having a 180° peel adhesive force of 4 to 15 N / 25 mm obtained when peeled at a peeling rate of 300 mm / min after being left to stand for 240 hours under an environment at 60°C and 90% humidity. When pressure is applied topically on the surface of the adhesive protective film as a result of an impact or the like, depressions in the film attributable to the presence of the adhesive film are appropriately mitigated despite the small thickness of the adhesive protective film. Cracks do not easily occur in the hard coat layer when the adhesive protective film is peeled, an increase in the peeling force due to the fracture stress of the cracks can be reduced, and the adhesive protective film can be suitably peeled during peeling.

Description

technical field [0001] The present invention relates to a protective adhesive film for protecting a screen panel provided on the surface of a display device such as a liquid crystal panel or an EL display, a screen panel having the protective adhesive film, and a portable electronic terminal having the same. Background technique [0002] Miniaturization and thinning of small electronic terminals such as mobile personal computers, electronic notebooks, and mobile phones have progressed, and image display devices such as liquid crystal displays used therein have been increasingly required to be thinner and thinner in recent years. In addition, most of these small electronic terminals are equipped with protective panels for preventing damage and breakage of image display devices. Especially with the increase of small electronic terminals capable of pen touch input, the requirements for preventing damage and damage are gradually increasing. [0003] As the panel, resin panels su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/02B32B27/00C09D175/08C09D175/16C09J201/00G09F9/00C09J7/29
CPCC08G18/6254C09D163/10C09J2203/318C08G18/755C09D4/00C08F283/00C08G18/1825C08G18/3853C09D175/04C08G18/672C08J7/04C09J7/0296C08G18/673C08F299/06C09J2201/162C08G18/8125C09D133/14C09D175/16G02F2201/50C08F299/00C08F290/06C09J2467/006C09D133/00C09J175/04G02F2202/28C09J2201/622C09J2475/006C08G18/6229C09D175/14C09J7/29C09J2301/162C09J2301/312C08J5/18G02F1/1309
Inventor 高桥佑辅中村龙一田边弘介
Owner DIC CORP
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