PE film and preparation method thereof

Abstract

The invention provides a PE film which is formed by co-extruding a corona layer, a middle layer and an inner layer. The corona layer comprises metallocene linear low density polyethylene resin and medium density polyethylene resin. The middle layer comprises low density polyethylene resin, linear low density polyethylene resin and medium density polyethylene resin. The inner layer comprises metallocene linear low density polyethylene resin and medium density polyethylene resin. The corona layer and the inner layer each comprises the high-proportion metallocene linear low density polyethylene resin, so that the PE film has good heat sealing performance, and the medium density polyethylene resin added in the corona layer, the middle layer and the inner layer enable the film to have good stiffness and flexibility, and the PE film is suitable for package of hygienic products.

Description

technical field

[0001] The invention relates to the technical field of packaging materials, in particular to a PE film and a preparation method thereof. Background technique

[0002] PE film is polyethylene film, which is a polyethylene film produced by flat extrusion and blown process, also known as unstretched polyethylene film. Compared with polypropylene film, polyester film and polyvinyl chloride film, PE film not only has lower cost, but also has good flexibility, heat sealing performance and vertical and horizontal properties; and PE film can also be plated after corona treatment. Aluminum, printing, or compounding with other materials to obtain films with better performance, so PE films are widely used as packaging materials for food, daily necessities and electronic products, and are currently widely used as plastic packaging materials. In addition, PE film has excellent water vapor and gas barrier properties, and is especially suitable for use as a packaging film ...

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