HDPE is a white powder or granular product. Non-toxic, tasteless, crystallinity was 80% ~ 90%, softening point is 125 l ~ 35 ℃, using temperature is 100 ℃; Hardness, tensile strength and creep were better than low density polyethylene. Good abrasion resistance, electrical insulation, toughness and cold resistance; Good chemical stability, insoluble in any organic solvent at room temperature, resistant to corrosion by acid, alkali and various salts.