3D protective film capable of being subjected to heat setting or UV irradiation setting

Abstract

The invention discloses a 3D protective film capable of being subjected to heat setting or UV irradiation setting and relates to the technical field of mobile phone protective films. The protective film comprises a protective film body, wherein the protective film body comprises an optical film base material, and the lower surface of the optical film base material is coated with a base film layer.The shrinkage rate of the base film layer is higher than that of the optical film base material; the optical film base material is a TPU or PMMA film formed by tape casting or coating; the base filmlayer is a TPU or acrylic material which is coated on the surface of the optical film base material and is subjected to UV curing or thermal curing; the upper surface of the optical film base materialis coated with a self-repairing coating or a hardened scratch-resistant layer, a PET protective film is compounded on the self-repairing coating or the hardened scratch-resistant layer, the lower surface of the base film layer is coated with an exhaust glue layer, and a PET release film is compounded on the lower surface of the exhaust glue layer. According to the invention, the sensitivity of fingerprint unlocking under the screen can be ensured, and the process yield and the production efficiency are improved to a great extent.

Description

technical field [0001] The invention relates to the technical field, in particular to a 3D protective film that can be heat-set or UV-irradiated set. Background technique [0002] With the development of science and technology, under-screen fingerprint recognition technology has become a development trend of smartphone unlocking methods. Currently, there are more and more curved screen phones that use under-screen fingerprint recognition technology to unlock. [0003] Most of the protective films of the existing curved screen mobile phones that use fingerprint unlocking under the screen use the optical protective film of the SRF substrate. The production process of the protective film material is complicated, and the SRF substrate has a certain polarization angle. Fixed-angle die-cutting, because the angle accuracy of all products after die-cutting cannot be guaranteed, it is prone to problems of poor fit and reduced unlocking sensitivity after matching with the mobile phone...

AI Technical Summary

Problems solved by technology

[0003] Most of the protective films of the existing curved screen mobile phones that use fingerprint unlocking under the screen use the optical protective film of the SRF substrate. The production process of the protective film material is complicated, and the SRF substrate has a certain polarization angle. Fixed-angle die-cutting, because the angle accuracy of all products after die-cutting cannot be guaranteed, it is prone to problems of poor fit and reduced unlocking sensitivity after matching with the mobile phone screen. In addition, the transverse tear strength of the SRF substrate is extremely poor. Hot bending is easy to break, resulting in poor stability in mass production, and its production process is cumbersome, including multiple steps such as finding polarization angle, adjusting typesetting, die-cutting, hot bending, and laminating

There are also some curved screen mobile phones that use fingerprint unlocking under the screen to use zero deflection angle PET substrate or TPU substrate as the protective film, but the loss of zero deflection angle PET is extremely high, and it needs heat bending to shape after die-cutting small pieces, and the process yield is low. , low production efficiency, and poor mass production; while the TPU substrate has poor embossing resistance and cannot meet the application needs of consumers.

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