What Is High-density Polyethylene

What Is High-density Polyethylene?

High-density polyethylene (HDPE), which is a white powder or granular product. Non-toxic, tasteless, crystallinity of 80%~90%, softening point of 125~135 °C, use temperature up to 100 °C; Hardness, tensile strength and creep are superior to LDPE; Good wear resistance, electrical insulation, toughness and cold resistance; Good chemical stability, insoluble in any organic solvent under room temperature conditions, resistant to acid, alkali and various salts; The film has little permeability to water vapor and air and low water absorption; Poor aging resistance, environmental stress cracking resistance is not as good as low-density polyethylene, especially thermal oxidation will reduce its performance, so the resin must add antioxidants and ultraviolet absorbers to improve this deficiency. High-density polyethylene film has a low heat deflection temperature under force, and attention should be paid to the application.

This century has seen a revolutionary advance in the field of pipelines, that is, "plastic instead of steel". With the rapid progress of polymer material science and technology, the deepening of the development and utilization of plastic pipes, and the continuous improvement of production technology, plastic pipes vividly demonstrate their excellent performance. Today, plastic pipes are no longer mistaken for "cheap substitutes" for metal pipes. In this revolution, polyethylene pipelines are favored and increasingly dazzling, widely used in gas transmission, water supply, sewage discharge, agricultural irrigation, mine fine particle solid transportation, as well as oil fields, chemical industry and post and telecommunications and other fields, especially in gas transmission has been widely used.

HDPE is a thermoplastic polyolefin produced from ethylene copolymerization. Although HDPE was introduced in 1956, the plastic has not yet reached a mature level. This universal material is also constantly developing its new uses and markets.