LDPE features and applicationsLDPE molecular chain has long and short branch chain, crystallinity is low, molecular weight is generally in 5~ 500,000, a milky white translucent waxy solid resin, non-toxic, softening point is low, good flexibility, impact toughness, low temperature resistance is very good, can work in -60~-80 degrees, electrical insulation excellent. LDPE mechanical strength is poor, heat resistance is not high, environmental stress cracking resistance, adhesion, printability is poor, may be surface treatment to improve its performance. LDPE water absorption is very low, almost no water absorption, excellent chemical stability, such as acid, alkali, salt, organic solvents are stable. High permeability to carbon dioxide and organic odor, but poor permeability to water vapor and air. Easy to burn, burning paraffin smell, easy to aging degradation and discoloration under the action of sunlight and heat.
LDPE is suitable for thermoplastic molding processing of a variety of molding processes, molding processability is good, such as injection molding, extrusion, blow molding, rotary molding, coating, foaming process, hot forming, heat sealing welding, hot welding, etc.
LDPE is mainly used for film products, such as agricultural film, ground cover film, agricultural film, vegetable greenhouse film; Packaging film such as candy, vegetables, frozen food packaging; Liquid packaging such as blow plastic film; Heavy packaging bags, shrink packaging bags, general industrial packaging film and food bags, etc. It can also be used for injection molding products; Extruded pipe, wire and cable; Blow out hollow containers.