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Research significance of reducing thermal expansion coeffici
[Time: 2014-02-20 11:44 Click: ]
Research significance of reducing thermal expansion coefficient of UHMWPE pipe

 
UHMWPE pipe is a new kind of polymer pipes, widely practical application.Its raw material is ultra-high molecular weight polyethylene(UHMWPE). Ultra-high molecular weight polyethylene is a thermoplastic kind of the most widely used plastics, based on ultra-high molecular weight polyethylene resin as the main ingredient, add various configurations of thermoplastic additives.Under the condition of a certain temperature, it can soften or melt into any shape, shape of after cooling is roughly the same, this state can be repeated many times, malleable, and this is just a physical change again and again, their character did not change, the practical application more convenient.UHMWPE pipe has been mining, chemical industry as the carrier, is widely used in medical, defense, automobile industry and so on into every aspect of People's Daily life, has replaced the metal material in some way.   

UHMWPE as a result of thermoplastic plastic molding shrinkage rate and thermal expansion coefficient of large faults, limits its application in some aspects.Reduce the thermal expansion coefficient of thermoplastics, improve its dimensional stability, on the one hand, can reduce the mismatch with other assembly parts and assembly clearance, beautify the assembly effect;On the other hand can reduce the thermal expansion between the pack accessories mechanical stress, thus reducing due to mechanical stress produced by the micro cracks, improve safety and service life of the product, moreover, because of ultra-high molecular weight polyethylene pipe due to the existing extrusion molding conditions, causing pipe material molding nozzle mouth, therefore, research on reducing thermal expansion coefficient of thermoplastics has very important significance. UHMWPE pipe


 
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