ANTI-FINGERPRINT TPU PROTECTIVE FILM FOR 3D CURVED SCREEN AND PREPARATION METHOD THEREFOR

WIPO Patent Application WO/2021/213114

A1

An anti-fingerprint TPU protective film for a 3D curved screen, the film comprising a low-adhesion protective film, an anti-fingerprint UV hardening coating formed by coating an anti-fingerprint UV hardening coating, an optical hard TPU resin film layer formed by coating optical hard TPU glue, an optical-grade high-adhesion silica gel pressure-sensitive adhesive layer formed by coating an optical-grade high-adhesion silica gel pressure-sensitive adhesive, and a fluorine element release film, which are fitted from top to bottom. The composition of the anti-fingerprint UV hardening coating comprises: UV prepolymer resin, an acrylate reactive diluent, a photoinitiator, a slipping aid and a first solvent. The optical-grade hard TPU glue is formed by polymerizing polyisocyanate, polyester polyol and a chain extender in a second solvent under the action of a first catalyst. The optical-grade high-adhesion silica gel pressure-sensitive adhesive is composed of silica gel resin, a cross-linking agent, an anchoring agent and a second catalyst. The anti-fingerprint TPU protective film for a 3D curved screen has the properties of fingerprint resistance, scratch resistance, being hard to crack and having a good fit to the curved screen.

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XUE MENG (CN)
DING JINGDE (CN)
ZHUANG YONGJIAN (CN)
ZHU LIPING (CN)

PCT/CN2021/082269

October 28, 2021

March 23, 2021

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GUANGDONG BANGGU FILM COATING INNOVATION ACAD CO LTD (CN)

C09J7/25; C08G18/32; C08G18/42; C08G18/44; C08G18/66; C08G18/73; C08G18/75; C08J5/18; C08J7/046; C09D175/14; C09J7/38; C09J11/06; C09J11/08; C09J183/04

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CN110878189A	2020-03-13
CN107033799A	2017-08-11
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CN209428448U	2019-09-24
US20140186542A1	2014-07-03
CN104693993A	2015-06-10
CN110484156A	2019-11-22

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