PE film for powder packaging, and preparation method thereof

Abstract

The invention discloses a PE film for powder packaging, and belongs to the technical field of PE films. The PE film is prepared from an inner layer, a middle layer and an outer layer through melt co-extrusion. The invention further discloses raw materials of the inner layer, the middle layer and the outer layer, and also provides a preparation method of the PE film. The PE film is high in weldingsealing strength, not prone to bag breaking and material leakage, easy to open, easy to weld and seal, antibacterial and particularly suitable for packaging of various powder materials, and the production cost is reduced; low-density polyethylene, linear low-density polyethylene, metallocene polyethylene and a fluorine-containing polymer in the middle layer are combined, so that the stiffness of the film can be improved, the appearance of the film is flatter, and the strength of the film can also be improved; and the inner layer is used as a solder sealing layer, the strength and solder sealing performance of the film are improved by adding metallocene polyethylene, the strength of the film is also improved by adding high-density polyethylene, the freshness retaining performance of the film is improved by adding an antibacterial agent, the opening performance of the film in use is improved by adding an anti-caking agent, and contents adsorbed by the film due to static electricity are reduced by adding an antistatic agent.

Description

technical field [0001] The invention belongs to the technical field of PE film. Background technique [0002] Polyethylene film, that is, PE film, refers to the film produced by PE, which can be divided into low-density polyethylene (LDPE), medium-density polyethylene (MDPE), high-density polyethylene (HDPE) and cross-linked polyethylene; low-density polyethylene Polyethylene film is a translucent, high-gloss film with good heat-sealing performance. It has excellent chemical stability, heat-sealing performance, water resistance and moisture resistance, freezing resistance, and can be boiled. It is often used as a film for composite flexible packaging materials , is also currently the most widely used and the largest amount of plastic packaging film, accounting for more than 40% of the consumption of plastic packaging film. Although low-density polyethylene has good toughness, its strength is low. Generally, powders such as flour, talcum powder, and medicines are flying when...

AI Technical Summary

Problems solved by technology

Although low-density polyethylene has good toughness, its strength is low. Generally, powders such as flour, talcum powder, and medicines are flying when they are packaged, and they are easy to stay in the sealing part, affecting the sealing effect. Ordinary PE film Due to the low strength of the welding seal, it is easy to break the bag and leak materials, etc.

Images