1. High Density Polyethylene ("HDPE" for short), also known as low pressure polyethylene, is a kind of translucent shape with high crystallinity and a certain degree of non-polar surface. PE has excellent resistance to most household and industrial chemicals.
2. HDPE is a thermoplastic resin with high crystallinity and non-polarity. High-density polyethylene is a white powder granular product, non-toxic and tasteless, the density is in the range of 0.940 ~ 0.976 g/cm3; the crystallinity is 80% ~ 90%, the softening point is 125 ~ 135 ℃, and the operating temperature can reach 100 ℃; melting temperature is 120~160℃. For materials with larger molecules, the recommended melting temperature range is between 200~250℃. It has good heat resistance and cold resistance, good chemical stability, high rigidity and toughness, and good mechanical strength. Dielectric properties and environmental stress crack resistance are also good. Hardness, tensile strength and creep are better than low density polyethylene; wear resistance, electrical insulation, toughness and cold resistance are better, but slightly worse than low density insulation; chemical stability is good, at room temperature Under certain conditions, it is insoluble in any organic solvent, resistant to corrosion by acid, alkali and various salts; the film has low permeability to water vapor and air, low water absorption; poor aging resistance, environmental cracking resistance is not as good as low density polyethylene, In particular, thermal oxidation will reduce its performance, so the resin needs to be added with antioxidants and ultraviolet absorbers to improve and improve this deficiency. The heat distortion temperature of high-density polyethylene film under stress is lower, which should be paid attention to when applying.