It is the abbreviation of polyethylene, which is a thermoplastic resin obtained by polymerizing ethylene. In industry, it also includes copolymers of ethylene and a small amount of -olefins.
Polyethylene is odorless, non-toxic, feels like wax, has excellent low-temperature resistance (the lowest operating temperature can reach -~-℃), has good chemical stability, and can withstand the erosion of most acids and alkalis (not resistant to Oxidizing acid), insoluble in general solvents at room temperature, has low water absorption, and has excellent electrical insulation properties. However, polyethylene is very sensitive to environmental stress (chemical and mechanical effects) and has poor heat aging resistance. The properties of polyethylene vary from species to species and mainly depend on molecular structure and density. Products with different densities (.~./3) can be obtained by using different production methods. Polyethylene can be processed using general thermoplastic molding methods (see Plastic Processing).
It has a wide range of uses, mainly used to make films, containers, pipes, monofilaments, wires and cables, daily necessities, etc., and can be used as high-frequency insulation materials for televisions, radars, etc.
The commonly used ones on the market are by piece and by length (volume). Small bags are mainly used for packaging small accessories. Most of the accessories bags for electronic products have anti-static effect. The bag openings are divided into flat mouth and self-sealing structures. The latter is also called bone bag (bone bag) or dense bag< br/> (Roll) bags need to be cut by yourself (for material packaging) and printed with incisions (for supermarkets).
The plastic wrap made of other materials can also be called a bag. Please note that the plastic wrap that is in direct contact with food must be made of materials (others are generally better), which is safer for the human body. Distinguishing method: The transparency, stretchability and stickiness of plastic wrap are stronger than plastic wrap. When the cling film is burned with fire, the flame will turn black, emit black smoke, and have a pungent smell. It will not drip oil and will automatically extinguish when it is removed from the fire source. When plastic wrap burns, the flame is yellow, odorless, drips oil, and can continue to burn after it is removed from the fire source.
Self-adhesiveness of aluminum foil stretch film
Suzhou PE bag