Analysis of the types of plastic films!

Films made of polyvinyl chloride, polyethylene, polypropylene, polystyrene and other resins for packaging and as lamination layers. Plastic packaging and plastic packaging products occupy an increasing share of the market, especially composite plastic flexible packaging, which has been widely used in food, medicine, chemical industry and other fields, among which food packaging accounts for a larger proportion, such as beverages Packaging, frozen food packaging, retort food packaging, fast food packaging, etc. These products have brought great convenience to people's lives.

Types of plastic films:

PVA-coated high-barrier plastic film is made by coating PVA with nano-inorganic substances on polyethylene film and then printing and compounding it. On the premise of not greatly increasing the cost, its barrier performance is not only significantly better than EVOH five-layer Co-extruded film, and the packaging cost is also greatly reduced, which not only ensures all the quality requirements for aseptic packaging of the packaged objects, but also greatly reduces the cost of aseptic packaging for food processing enterprises, which can be used for packaging beverages, juices, milk , soy sauce vinegar, etc.

Low-density polyethylene plastic films are generally made by blow molding and casting. The thickness of cast polyethylene plastic film is uniform, but due to its high price and low cost, it is widely used. Low-density polyethylene film is a translucent, glossy, soft-textured plastic film with excellent chemical stability, heat-sealability, water resistance and moisture resistance, freezing resistance, and can be boiled. Its main disadvantage is that it has poor barrier properties to oxygen. It is often used in the inner film of composite flexible packaging materials, and it is also a plastic packaging film that is widely used and used in a large amount, accounting for more than 40% of the consumption of plastic packaging film.

Nylon film is a very tough film with good transparency, good gloss, high tensile strength and tensile strength, and good heat resistance, cold resistance, oil resistance and organic solvent resistance. It has excellent abrasion resistance and puncture resistance, and is relatively soft and has excellent oxygen barrier properties, but has poor water vapor barrier properties, high moisture absorption and moisture permeability, and poor heat sealing properties. It is suitable for packaging hard items, such as greasy Sex food, meat products, fried food, vacuum-packed food, retort food, etc.