Fingerprint screen protector under 3D screen and preparation method thereof

Abstract

The invention discloses a fingerprint screen protector under a 3D screen and a preparation method thereof, and relates to the field of screen protectors and preparation thereof. According to the fingerprint screen protector under the 3D screen, multiple layers of materials are compounded, the fingerprint unlocking function under an optical screen is not affected, and the requirement for fitting protection of all curved screens in the current market can be met. The fingerprint screen protector under the 3D screen comprises an upper protective film, a dual-cured polyurethane coating, a pyrolysis PU coating, a silica gel layer and a release film from top to bottom, the thickness of the upper protective film is 25-60 [mu] m, the thickness of the dual-cured polyurethane coating is 5-30 [mu] m, the thickness of the pyrolysis PU coating is 20-120 [mu] m, and the thickness of the silica gel is 15-50 [mu] m; the pyrolysis PU coating is prepared from the following components in parts by weight: 80 to 90 parts of modified polyurethane, 10 to 18 parts of a monomer, 3 to 5 parts of a curing agent, 0.1 to 0.5 part of a polymerization inhibitor, 0.5 to 2 parts of a flatting agent and 0.1 to 0.3 part of a de-foaming agent.

Description

technical field [0001] The invention relates to the field of screen protectors and preparation thereof, in particular to a 3D under-display fingerprint screen protector and a preparation method thereof. Background technique [0002] With the advent of the 5G era, in order to achieve a better look and feel and convenience, mobile phone screens have gradually changed from flat to curved screens, and the fingerprint unlocking function under the 3D optical screen has been added. The screen-to-body ratio is getting higher and higher. The curvature is getting bigger and bigger, but the screen is fragile, and how to make unlocking more convenient after the film has become a prominent problem. [0003] Traditional glass tempered film and PET-based 3C protectors can only be used on flat and small curved mobile phones because of the hard material, poor formability, and poor fit. At the same time, due to the optical angle and thickness of the material, 3D screen The optical unlock of ...

AI Technical Summary

Problems solved by technology

[0002] With the advent of the 5G era, in order to achieve a better look and feel and convenience, mobile phone screens have gradually changed from flat to curved screens, and the fingerprint unlocking function under the 3D optical screen has been added. The screen-to-body ratio is getting higher and higher. The curvature is getting bigger and bigger, but the screen is fragile, and how to make unlocking more convenient after the film has become a prominent problem

[0003] Traditional glass tempered film and PET-based 3C protectors can only be used on flat and small curved mobile phones because of the hard material, poor formability, and poor fit. At the same time, due to the optical angle and thickness of the material, 3D screen Optical unlock failed for

[0004] In the past, the composite structure of TPU or PC and other materials appeared in the products, and there were a series of problems such as low surface hardness, poor hand feeling, and poor adhesion of silica gel, which were difficult to solve.