A polarizer self-adhesive protective film

Abstract

The invention discloses a self-adhesive protection film for a polaroid. The self-adhesive protection film for a polaroid includes an adhesion layer, a core layer and a surface layer, wherein the adhesion layer, the core layer and the surface layer are successively contacted; and the adhesion layer is formed by means of extrusion and film blowing of the materials with the following amounts by weight: vinyl polyacrylate, polypropylene, low density polyethylene, metallocene polyethylene, polyolefin elastomer and grafted polypropylene. The self-adhesive protection film for a polaroid selects from self-adhesive materials and does not demand extra usage of sticker and usage of an organic solvent during the preparing process; and the adhesion layer is good in the peeling performance; when the adhesion layer is peeled from the polaroid, residual gum and dirt are not easy to form on the surface of the polaroid; and at the same time, the self-adhesive protection film is good in barrier performance.

Description

technical field [0001] The present invention relates to the field of membranes. More specifically, the present invention relates to a polarizer self-adhesive protective film. Background technique [0002] The full name of polarizer is polarizer, which is an important part of LCD. Its basic structure includes: the middle polyvinyl alcohol layer, and two layers of triacetate cellulose. Among them, the polyvinyl alcohol layer plays a polarizing role, but the polyvinyl alcohol layer is very easy to hydrolyze. In order to protect the physical properties of the polarizing film, it is compounded once on both sides of the polyvinyl alcohol layer to have high light transmittance and good water resistance. There is also a cellulose triacetate film with a certain mechanical strength for protection, thus forming the original plate of the polarizer. [0003] In the production of LCD polarizers, according to different usage requirements, it is necessary to compound a protective film on ...

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Problems solved by technology

[0003] In the production of LCD polarizers, according to different usage requirements, it is necessary to compound a protective film on one side of the polarizer original plate. The general protective film is a glue-coated protective film, and the adhesive layer of the glue-coated protective film is coated with a low-molecular resin material. , a wide range of adhesive strength, and a high degree of adhesion to the original polarizer plate, but the adhesive protective film must use organic solvents in the manufacturing process, resulting in pungent odors, and must be baked twice to remove organic solvents, resulting in cost In addition, when the adhesive protective film is peeled off from the original polarizer plate, it is easy to form residual glue and stains on the polarizer surface

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