Ultralow-temperature PE film and raw material process thereof

Abstract

The invention discloses an ultralow-temperature PE film and a raw material process thereof. The ultralow-temperature PE film comprises a film outer layer, a film middle layer and a film inner layer, wherein the film middle layer is arranged at one side of the film inner layer; the film inner layer and the film middle layer are fused together through three-layer co-extrusion; the film outer layer is arranged at one side of the film middle layer; and the film middle layer and the film outer layer are fused together through three-layer co-extrusion. The ultralow-temperature PE film provided by the invention achieves the following functions: the heat sealing temperature of a plastic film is reduced; the time of heat sealing is shortened; the quality of film appearance is guaranteed; and the rate of a finished product is improved.

Description

Technical field [0001] The invention relates to the technical field of plastic packaging bags, specifically a kind of ultra-low temperature PE film and its raw material process. Background technique [0002] Plastic packaging bag is a kind of packaging bag that uses plastic as raw material to produce various supplies in daily life. It is widely used in daily life and industrial production. The commonly used plastic packaging bags are mostly composite PET, A film made of PET aluminized, aluminum foil, PA and other materials. The film is non-toxic, so it can be used to hold food. There is also a film made of polyvinyl chloride, which is also non-toxic, but depending on the use of the film Additives are often harmful to the human body and have certain toxicity. Therefore, such films and plastic bags made of such films are not suitable for holding food. [0003] Plastic packaging bags are currently common packaging bags on the market. Plastic packaging bags generally need to undergo a...

AI Technical Summary

Problems solved by technology

[0002] Plastic packaging bag is a kind of packaging bag that uses plastic as raw material to produce various daily necessities. It is widely used in daily life and industrial production. The commonly used plastic packaging bags are mostly composite PET with polyethylene as the inner layer material. The film made of PET aluminum, aluminum foil, PA and other materials is non-toxic, so it can be used to hold food. There is also a film made of polyvinyl chloride, which is also non-toxic, but it depends on the use of the film. The additives added are often harmful substances to the human body and have certain toxicity, so this type of film and the plastic bag made of the film are not suitable for holding food

[0003] Plastic packaging bags are common packaging bags on the market at present. Plastic packaging bags generally need to go through the heat sealing process of the inner layer to form a sealed packaging bag. The heat sealing temperature of PE is generally around 120°C, while plastic packaging bags are generally more Layer composite materials, when heat-sealing, the film in contact with the equipment is always the outermost film. At a temperature above 120°C, the outermost film often has wrinkles and other problems caused by prolonged exposure to high temperature. When the appearance is defective, the inner layer is usually not heated to a temperature sufficient for heat sealing, which leads to appearance defects of the heat-sealed product after heat sealing, resulting in unsightly appearance of the product, and even because the outer layer is heat-sealed for too long , leading to waste

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