Formula of high-temperature resisting clean type self-adhesion protective film

Abstract

The invention relates to a formula of a high-temperature resisting clean type self-adhesion protective film. The formula comprises an adhesion layer, an intermediate layer and a back layer, wherein the adhesion layer is composed of 50%-85% by weight of ethylene-vinylacetate and 15%-50% by weight of polyethylene; the intermediate layer is composed of 75%-90% by weight of high density polyethylene and 15%-25% by weight of low density polyethylene; and the back layer is composed of 80%-90% by weight of high density polyethylene and 10%-25% by weight of low density polyethylene. According to the invention, the formula aims at an upper blowing process, an ethylene-vinylacetate copolymer is used as the adhesion layer to provide an adhesive material combined with the characteristic that high density polyethylene has a high melting point, and good processing property of low density polyethylene is fully utilized; and the self-adhesion protective film produced by using the formula has the characteristics of high temperature resistance and good viscosity, and is clean.

Description

technical field [0001] The invention relates to a formula of a protective film, in particular to a formula of a high-temperature resistant clean self-adhesive protective film. Background technique [0002] During the transportation, storage, processing or assembly of some commodities, it is often necessary to protect the surface of materials and parts to prevent harmful gases, microbial corrosion and dust pollution, or to avoid scratches caused by mechanical scratches, etc., one of the commonly used methods One is to stick a protective film on the surface of the object to be protected, and then remove the protective film after transportation, storage, processing or assembly are completed, so as to protect the surface of the material. Common protective film products on the market include PP (polypropylene) film, PVC (polyvinyl chloride) film, PE (polyethylene) film, EVA (ethylene-vinyl acetate copolymer) film, etc., which have been widely used on aluminum Surface protection ...

AI Technical Summary

Problems solved by technology

[0005] As mentioned earlier, high temperature resistance, cleanliness and good viscosity are the application characteristics that must be possessed by surface protection film materials. Although the existing co-extrusion protection film production process is more environmentally friendly and has been widely used, there are still some shortcomings, such as , the existing three-layer co-extrusion blown film, its high temperature resistance is poor, its adhesive strength changes with the temperature, the paste is firm at high temperature, but sometimes it is too firm and difficult to tear off when it is serious, affecting the surface of the protected object , and at low temperatures, the viscosity becomes worse, and even falls off, which cannot protect the surface. These deficiencies affect the development of protective films, especially self-adhesive protective films.