What is high density polyethylene

High-density polyethylene (HDPE) is a white powder or granular product. Non-toxic, odorless, with a crystallinity of 80% to 90%, a softening point of 125 to 135°C, and a service temperature of up to 100°C; its hardness, tensile strength and creep properties are better than those of low-density polyethylene; its wear resistance and electrical properties are It has good insulation, toughness and cold resistance; good chemical stability, insoluble in any organic solvent at room temperature, and resistant to corrosion by acids, alkali and various salts; the film has low permeability to water vapor and air, and is water absorbent. Low; poor aging resistance, environmental stress cracking resistance is not as good as low-density polyethylene, especially thermal oxidation will reduce its performance, so antioxidants and ultraviolet absorbers must be added to the resin to improve this shortcoming. High-density polyethylene film has a low thermal deformation temperature under stress, so care should be taken when applying it.