High density polyethylene
It is a kind of thermoplastic polyolefin produced by copolymerization of ethylene.
It is a kind of white powder or granular product, non-toxic and odorless, with crystallinity of 80% ～ 90%, softening point of 125 ～ 135 ℃, and service temperature up to 100 ℃. It has hardness, tensile strength and creep property better than low density polyethylene. It has good wear resistance, electrical insulation, toughness and cold resistance. It has good chemical stability and insoluble in any organic solvent at room temperature.
It is widely used in gas transportation, water supply, sewage discharge, agricultural irrigation, transportation of fine particle solid in mine industry, oil field, chemical industry, post and telecommunication, etc, especially in gas transportation.