The plastic film is a film made of polyvinyl chloride, polyethylene, polypropylene, polystyrene, and other resins, used for packaging, and as a coating layer.
Plastic packaging and plastic packaging products account for a growing share in the market, especially composite plastic flexible packaging, which has been widely used in food, medicine, chemical and other fields, among which food packaging accounts for the largest proportion, such as beverage packaging. , frozen food packaging, retort food packaging, fast food packaging, etc., these products have brought great convenience to people's lives.
Plastic films are the most widely used in the packaging field. Plastic film can be used for food packaging, electrical product packaging, daily necessities packaging, clothing packaging, and the like. They have one thing in common, that is, the plastic film should be color-printed, and as a food package, a multi-layer composite or vacuum aluminum plating process is required. Therefore, the plastic film is required to have a high free energy and a large wet tension to facilitate the strong adhesion of the printing ink, the adhesive or the aluminized layer to the plastic film; in the production process of the plastic film winding and high-speed packaging, The surface of the film is required to have a certain frictional property to prevent the film from sticking or slipping; when used for packaging of electrical appliances and electronic products, the film is required to have certain antistatic properties and the like.
Film type PVA coated high barrier film Biaxially oriented polypropylene film (BOPP) Low density polyethylene film (LDPE) Polyester film (PET) Nylon film (PA) Cast polypropylene film (CPP) Aluminized film plastic film surface The treatment methods include corona treatment, chemical treatment, mechanical roughing, coating, etc., and the most commonly used is corona treatment.
The plastic film used is polyethylene (PE), polyvinyl chloride (PVC), polystyrene (PS), polyester film (PET), polypropylene (PP), nylon, and the like.
The performance of various plastic films is different, the degree of difficulty in printing is also different, and the use as a packaging material is also different.
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