High-transparency polyethylene film used for protection film

Abstract

The invention relates to a high-transparency polyethylene film used for a protection film, which is a composite film prepared by an inner layer, an intermediate layer and an outer layer through steps of fusion, co-extrusion and film blowing, wherein: thickness of the inner layer accounts for 10-35% of that of the composite film, the inner layer comprises the following raw materials in parts by weight: 40-60 parts of low-density polyethylene, 40-60 parts of metallocene-linear low density polyethylene, 1-8 parts of PPA master batch, 1-8 parts of transparent nucleating agent master batch and 0.1-5 parts of slipping agent master batch; the thickness of the intermediate layer accounts for 35-55% of that of the composite film, the intermediate layer comprises the following raw materials in parts by weight: 30-50 parts of low-density polyethylene, 50-70 parts of metallocene-linear low density polyethylene, 1-8 parts of PPA master batch, and 1-8 parts of transparent nucleating agent master batch; and the thickness of the outer layer accounts for 10-30% of that of the composite film, the outer layer comprises the following raw materials in parts by weight: 30-50 parts of low-density polyethylene, 50-70 parts of metallocene-linear low density polyethylene, 1-8 parts of PPA master batch, 1-8 parts of transparent nucleating agent master batch, and 1-10 parts of SEBS. The polyethylene film is transparent, and is easily unreeled and peeled, and can satisfy the performance requirement of polyethylene film by the protection film.

Description

technical field [0001] The invention relates to a highly transparent polyethylene film for a protective film. Background technique [0002] The protective film is a film material that has a protective effect on the surface of other materials. Its main function is to protect the protected material from mechanical scratches, dust pollution, harmful gas erosion and microorganisms during manufacturing, transportation, storage and secondary processing. corrosion. The base films used to make protective films mainly include polyethylene film, polypropylene film and polyethylene terephthalate film, etc. Among them, polyethylene film has softness, good toughness, high elongation, easy bending processing and Good adhesion and other characteristics, occupy a large market share in the protective film. With the wide application of protective films in industrial products, decorative materials and people's daily life, people have higher and higher requirements for the performance of prot...

AI Technical Summary

Problems solved by technology

The polyethylene protective film produced by the traditional process has low tensile strength and is easy to break the film. Especially after the pressure-sensitive adhesive is coated and rewound, the pressure-sensitive adhesive layer has too much adhesion to the inner layer of the polyethylene film, which is not easy to be unwound and peeled off. Tensile deformation, causing the polyethylene protective film to warp or fall off due to creep during the application