Protective film

Abstract

A protective film for attaching to a glass surface comprises an adhesion layer for adhering to the glass surface, an anti-shock layer located on the adhesion layer, and a support layer connected onto the anti-shock layer. A construction material of the support layer is selected from one of poly(ethylene terephthalate) and polyvinyl chloride; particularly, the composition of the anti-shock layer comprises a styrene-butadiene block copolymer, so that glass attached with the protective film has good shock resistance and is not easily broken and cracked by foreign objects; and moreover, the light transmittance of the protective film to visible light is not less than 85%, so the protective film is applicable to surface protection of touch screen glass panels and car windshields, and besides also can increase the service life and the security of glass materials.

Description

technical field [0001] The invention relates to a protective film, in particular to a protective film which is attached to the surface of glass and has optical properties. Background technique [0002] As we all know, functional protective films are often pasted on the surface of the object to be protected, so that the surface of the object to be protected will not be affected by dust adhesion, dirt, scratches, etc. Recently, due to the large increase in 3C products such as touch screens, With the development, the usage of glass plates is larger and the quality requirements are more diversified, which also greatly increases the market demand for protective films for glass surface coating. Various patents applied for the protective film. [0003] For example, U.S. Patent Application No. US20110236629 (hereinafter referred to as "629 case") mentions a protective sticker for electronic products, and this protective sticker includes a layer selected from urethane, thermoplastic...

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Problems solved by technology

[0003] For example, U.S. Patent Application No. US20110236629 (hereinafter referred to as "629 case") mentions a protective sticker for electronic products, and this protective sticker includes a layer selected from urethane, thermoplastic elastomer, polyether Polyurethane (polyether urethane), polyester urethane (polyester urethane), or aliphatic urethane (aliphatic urethane) plastic film, and the Shaw hardness of the plastic film is 25A-25D, The elongation (elongation) is greater than 400%, the tensile strength is greater than 9000psi (about 62MPa), and then the plastic film is pasted on the surface of the electronic product with an adhesive layer, and these plastic films mainly composed of amino esters It can reduce the scratch damage on the surface of the electronic product during use, but the main problem to be solved in the "629 case" is the flatness of the protective sticker when it is attached to the shell of the electronic product

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