The main components of plastic bags

Polyethylene (PE): High density polyethylene (HDPE) is commonly used in shopping bags, vest bags and inner packaging bags in shopping malls; Low density polyethylene (LDPE) is commonly found in shopping bags, outer packaging bags, inner packaging bags and heat shrinkable films in shopping malls. Linear low-density polyethylene (LLDPE) is often used as preservative paper (film) or mixed with LDPE. (Example of Plastic Bag Production Machine)

Polypropylene (PP) is commonly used in high transparent outer packaging bags, high transparent packaging films and high transparent heat shrinkable films.

Polyvinyl chloride (PVC) exists in blood bags, soft film slit bags and heat shrinkable films.

Vinyl acetate (EVA) exists in special bags of large companies.

Polyethylene+vinyl acetate (PE+EVA mixture) is available in special bags of large companies.

Polyethylene-coated polypropylene (PE/PP) is often used for high-quality printing outer packaging bags.

Polyethylene coated vinyl acetate (PE/EVA) was found in special bags produced by large companies.

Polyethylene coated polyvinyl chloride (PE/PVC) exists in vacuum or fresh-keeping prepackaged bags.

PE/ PA is often used in prepackaged bags for vacuum preservation of meat.

Polyethylene-coated polyethylene terephthalate (PE/PET) exists in vacuum or fresh-keeping packaging.

Polypropylene coated polypropylene (PP/PP) is often used for high-quality printing outer packaging bags.

Extended data:

Plastic bags are light, easy to shape, and widely used, including soft, hard, wet, dry, sealable, breathable, disposable and long-term use. Since the appearance of plastics, people have been studying to replace materials such as metal, wood or glass with plastics to reduce weight, facilitate use, storage and transportation or reduce fuel consumption.

Plastic bags can also be used to protect goods, keep food fresh, carry liquids and wrap air. Most of the goods in the supermarket are packed in plastic.

Baidu encyclopedia-plastic bag