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Changle Shuntai Plastic Rubber Products Co.,Ltd
Address: Qiaoguan Town, Changle County, Weifang City, Shandong Province, China
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HDPE Flat Bag High Crystallinity
- Jun 15, 2017 -

HDPE Flat Bag High crystallinity

High-density polyethylene (High Density Polyethylene, referred to as "HDPE"), also known as low-pressure polyethylene, is a high degree of crystallinity, non-polar surface to a certain degree of translucent. PE has excellent resistance to most of the characteristics of life and industrial chemicals.

HDPE is a high degree of crystallinity, non-polar thermoplastic resin. High density polyethylene is a white powder granular products, non-toxic, tasteless, the density of 0.940 ~ 0.976 g / cm3 range; crystallinity of 80% to 90%, softening point of 125 ~ 135 ℃, the use of temperature up to 100 ℃; melting temperature of 120 ~ 160 ℃, for the larger molecules, the proposed melting temperature range of 200 ~ 250 ℃ between. It has good heat resistance and cold resistance, chemical stability, but also has a high rigidity and toughness, good mechanical strength. Dielectric properties, resistance to environmental stress cracking is also better. Hardness, tensile strength and creep are better than low density polyethylene; abrasion resistance, electrical insulation, toughness and cold resistance are better, but with the low density insulation slightly worse; chemical stability, at room temperature Conditions, do not dissolve in any organic solvents, acid, alkali and various salts of corrosion; film on the water vapor and air permeability, low water absorption; poor aging resistance, resistance to environmental cracking than low-density polyethylene, In particular, the thermal oxidation of the performance will be reduced, so the resin need to add antioxidants and UV absorbers to improve the improvement of this problem. High-density polyethylene film in the case of stress under the heat distortion temperature is low, this point should pay attention to the application.

This century in the pipeline area has undergone a revolutionary progress, that is, "plastic and steel." With the scientific and technological advances in polymer materials, plastic pipe development and utilization of the deepening of the continuous improvement of production technology, plastic pipe vividly demonstrated its superior performance. Today, plastic pipe is no longer mistaken for metal pipe "cheap substitutes". In this revolution, polyethylene pipe favored, increasingly issued eye-catching brilliance, widely used in gas transmission, water supply, sewage, agricultural irrigation, mine fine particle solid transport, as well as oil, chemical and telecommunications and other fields, especially in Gas transmission has been widely used.

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

China's domestic high-density polyethylene (where high-density polyethylene does not include full density polyethylene plant production of high-density polyethylene) manufacturers in the oil, Sinopec, CNOOC three companies, as of the end of 2006, are high-density oil There are four sets of polyethylene devices, namely, Lanzhou Petrochemical high-density polyethylene plant, Daqing Petrochemical high-density polyethylene plant, Liaoyang Petrochemical high-density polyethylene plant, Jilin Petrochemical high-density polyethylene plant.

High density polyethylene is usually manufactured using the Ziegler-Natta polymerization process, which is characterized by no branched chains on the molecular chain, so the molecular chains are structured and have a high density. The process in the tube or kettle low pressure reactor to ethylene as raw material, with oxygen or organic peroxide as initiator initiates polymerization.