Novel printable mobile phone rear cover inner explosion-proof membrane and preparation method thereof

Abstract

The invention discloses a novel printable mobile phone rear cover inner explosion-proof film which sequentially comprises a PE protective film layer, a printable layer, a PET base material layer, an optical adhesive layer and a release film layer from bottom to top; the optical adhesive layer contains an epoxy curing agent, an ultraviolet absorber and a coupling agent; the ultraviolet light absorber is selected from one or more of an ultraviolet light absorber UV-P, an ultraviolet light absorber UV-234, an ultraviolet light absorber UV-329 and an ultraviolet light absorber UV-531, and the coupling agent is selected from one or more of a silane coupling agent KH-550, a silane coupling agent KH-560, a silane coupling agent KH-570 and a silane coupling agent KH-580. The explosion-proof film has high peel strength to mobile phone rear cover glass, the peel strength can reach 2000 gf / in or above, the explosion-proof film still has stable peel strength under the environments of high temperature, low temperature, 65 / 95, salt mist, QUV and the like, and no adhesive residue phenomenon is generated; the silane coupling agent is added into the optical adhesive layer, so that the base material adhesive force performance of the optical adhesive is greatly improved, and the degumming problem of the explosion-proof membrane is solved.

Description

【Technical field】 [0001] The invention relates to the technical field of polymer films, in particular to the technical field of a novel printable explosion-proof film in the back cover of a mobile phone. 【Background technique】 [0002] With the advent of the 5G era, mobile phone technology is developing more and more rapidly, and people have higher and higher requirements for mobile phone signal reception capabilities. Compared with metal materials, glass materials have a weaker shielding effect on signals and have better visual effects. , so most mobile phone manufacturers use glass back cover instead of the original metal back cover. [0003] However, the defect that the glass back cover is easy to break and splash has brought difficulties to mobile phone manufacturers. In order to solve the problem of glass back cover being fragile and splashing, the material manufacturer designed the explosion-proof film inside the back cover of the mobile phone, which is pasted behind t...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems in the prior art, and propose a new type of explosion-proof film inside the back cover of the printable mobile phone, which can effectively absorb ultraviolet rays, avoiding the adverse effects of ultraviolet rays on the product during downstream laser processing, and With printing function, it can print anti-counterfeiting signs or personalized patterns on the explosion-proof film according to people's needs

Images