Flexible silica gel screen protection film and preparation method thereof

Abstract

The invention discloses a flexible silica gel screen protection film, and belongs to the technical field of protection films. The flexible silica gel screen protection film mainly structurally comprises a PETrelease film, a hardened coating coated on the release surface of the PET release film, an organic silica gel layer coated on the hardened coating, an organic silicon pressure-sensitive adhesive layer coated on the organic silica gel layer, and a fluorine release film adhered on the organic silicon pressure-sensitive adhesive layer, wherein the hardened coating, the organic silica gel layer and the organic silicon pressure-sensitive adhesive layer are compounded into a use layer; the surface hardness of the use layer is HB-2H, the light transmittance is greater than or equal to 91%, the haze is less than or equal to 1%, and the softness is 25A-60A; and the thickness ratio of the hardened coating to the organic silica gel layer to the organic silicon pressure-sensitive adhesive layer in the use layer is (2-4): (40-50): (20-30). The flexible silica gel screen protection film has better flexibility and has more excellent fitting performance for curved edge amplitudes of an AF screen and a 2.5 D / 3D screen and is not degummed during die cutting and can be directly fit with a curved screen for use without hot-pressing preforming, and can play a better role in protecting existingcurved screen electronic equipment.

Description

technical field [0001] The invention belongs to the technical field of protective films, and in particular relates to a flexible silica gel screen protective film and a preparation method of the protective film. Background technique [0002] Currently used in various protective films on the market, it is necessary to use films of various materials as the basis and coat different pressure-sensitive adhesives on the surface to form a protective film. Due to the difference in the material performance of the pressure-sensitive adhesive and the film, the performance difference of each layer of the entire protective film is abnormal, such as the difference in temperature resistance at high temperature, the occurrence of residual glue, and the stress of the base film causing abnormalities such as edge warping after lamination; at the same time From raw materials to the production and formation of the protective film, this production process leads to complex procedures, transportati...

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Problems solved by technology

[0004] In the prior art, such as Chinese patent: CN105969233B, there is provided a protective film and its preparation method that does not bounce back after hot pressing, and adopts coating various functional layers on the PET base film to realize the protection of the screen, but due to the toughness of PET High, it usually needs to be hot-pressed and preformed before use, but as the use time increases, the curved surface will warp, which greatly affects the use experience

[0005] In the prior art, such as Chinese patent: CN109575825A, a kind of wear-resistant silica gel protective film for curved screen is provided, which adopts coating hardened layer and organic silica gel layer on both sides of TPU (thermoplastic polyurethane film), although it can be well attached to the curved screen. It does not warp and rebound, but due to the temperature resistance of TPU, it is prone to degumming during die-cutting, resulting in a large number of defective products

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