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 ? improve wear resistance. Improve the performance of the most striking molecular weight polyethylene is that it has a very high wear resistance, the performance of many engineering applications are very valuable. At present, all plastic, its wear resistance is the best, and even many metal materials (such as carbon steel, stainless steel, bronze, etc.) the rules to wear is not as it. With the rise of the polyethylene molecular weight of this material is more wear-resistant 
 The ? high impact resistance. The impact strength of ultrahigh molecular weight polyethylene and its molecular weight, molecular weight less than 2 million, with the molecular weight growth, increased impact strength reached a peak at around 2 million, this time the peak molecular weight, and then increase the impact strength but will decline. This is due to the molecular chain is hindered its light-crystallization of macromolecules in the amorphous region which can absorb the impact energy. 
 According to literature data, the value of ultra-high molecular weight polyethylene and other plastic impact strength measured according to the ASTM-D256 method, derived from the comparison: ultra-high molecular weight polyethylene at room temperature impact resistance can be divided into impact-resistant polycarbonate esters of known comparable applied to common engineering plastics. Ultrahigh molecular weight polyethylene-40oC at low temperatures, there is still ridiculed impact resistance, even in the liquid-gas-269oC temperature, can still maintain a good impact resistance, excellent low temperature properties, so that the ultra-high The molecular weight polyethylene application is extended to the field of cryogenic engineering. 
 ? 3, a low coefficient of friction. Ultra-high molecular weight polyethylene wear, and low coefficient of friction, good self-lubricity, is an ideal bearing bushings, slider, the lining material. 
 The use of ultrahigh molecular weight polyethylene as the friction of the device components, can improve the wear life, but also receive an energy-saving effect. 
 ? 5, low water absorption. Ultrahigh molecular weight polyethylene is very low water absorption, it is almost non-absorbent and does not swell in water, water absorption is much smaller than the nylon. 
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