3D curved screen protective film and preparation method thereof

Abstract

The invention relates to the field of screen protection films, and particularly discloses a 3D curved screen protection film and a preparation method thereof. The protective film comprises a hardened layer, a PET base material layer, a polyurethane resin layer and a bonding layer which are sequentially arranged from top to bottom; and the bonding layer is prepared from, by weight, an acrylate functional monomer, an acrylate cross-linking monomer, an acrylate monomer, an initiator, a cross-linking agent, a flatting agent, ethyl acetate, dimethylacetamide and a silane coupling agent. The preparation method comprises the following steps: S1, coating one surface of the PET base material layer with polyurethane acrylic resin, baking, and curing to form the hardened layer; S2, coating the other surface of the PET base material layer with the polyurethane resin, baking, and curing to form a polyurethane resin layer; and S3, coating one surface of the polyurethane resin layer with a modified acrylic pressure-sensitive adhesive, and baking and curing to form the bonding layer. The adhesive force between the protective film and the curved screen is high, the protective film can be perfectly attached to the curved screen, and the edge is not prone to warping.

Description

technical field [0001] The present application relates to the field of screen protective films, more specifically, it relates to a 3D curved screen protective film and a preparation method thereof. Background technique [0002] With the development of the electronics industry, many brands have successively developed and launched mobile phones with 3D curved screens, which has prompted smart phones to enter the era of curved screens and folding screens from straight touch screens. Since the screen has changed from a straight board to a 3D curved screen, the protective film that protects the screen of the mobile phone should also be changed into a 3D shape to fit the screen of the mobile phone. [0003] At present, mobile phone protective films usually use silicone sub-sensitive adhesive or acrylic pressure-sensitive adhesive that is well bonded to mobile phones as the adhesive layer of the protective film. However, since the surface of the 3D curved screen is generally treate...

AI Technical Summary

Problems solved by technology

[0003] At present, mobile phone protective films usually use silicone sub-sensitive adhesive or acrylic pressure-sensitive adhesive that is well bonded to mobile phones as the adhesive layer of the protective film. However, since the surface of the 3D curved screen is generally treated with anti-fingerprint treatment, the water contact angle> 110°, the surface energy is low, so that the adhesion between the traditional silicone sub-sensitive adhesive, acrylic pressure-sensitive adhesive and the mobile phone screen generally only reaches 30-40g, and the adhesion is small, so it is difficult to fit the screen closely. This will cause warping of the edge of the curved R corner of the 3D curved screen mobile phone, which will affect the protective effect of the protective film on the mobile phone screen.

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