Through various experiments, it can be fully proved that with the continuous improvement of the manufacturing process of PE wear-resistant plates, its application fields are more and more extensive, and it has also played an important role in the field of power generation in recent years. PE wear plate is a linear structure polyethylene with a viscosity average molecular weight of more than 3 million. Compared with other engineering materials, it has unmatched wear resistance, impact resistance, self-lubrication, corrosion resistance, low temperature resistance, hygienic non-toxicity, no adhesion, no water absorption and other comprehensive properties. High wear resistance: The static friction coefficient of PE wear plate is about 0.07, and the wear resistance is very high. Corrosion resistance: PE wear plate can be used for 80 degree concentrated hydrochloric acid, 75% concentrated sulfuric acid, 20% nitric acid. Impact resistance: Ultra high molecular weight polyethylene (PE wear plate) board has the highest impact resistance of nylon. PE wear plates are difficult to crack due to strong external impact and internal pressure fluctuations. Its impact strength is 20 times that of polyvinyl chloride, 10 times that of nylon 66, and 8 times that of polytetrafluoroethylene.
Low temperature resistance: It has a certain ductility at a low temperature of 269 degrees below zero. Electrical resistance: large volume resistance, breakdown voltage 50 kV/mm, dielectric constant 2.3. Hygienic non-toxic: no odor, no poison, no smell, no corrosion. It is precisely because of the above advantages of PE wear plates that their application range is expanding and they have the potential to replace traditional engineering materials. Through continuous improvement and modification of ultra-high molecular weight polyethylene lining, the product has broad application prospects in the coal mining industry. The material has the advantages of high wear resistance, low friction coefficient, low cost and good process performance, and can be used for coal mine mechanical bearings, bushings, flat plates, filter press filter plates, friction plates, jet sieve plates and the like. Let's take a look at the main effects of molecular weight on mechanical properties:
In general, the molecular weight or degree of polymerization of the polymer must reach a certain value (critical polymerization degree) in order to exhibit suitable mechanical strength. The critical degree of polymerization of the highly polar polymer is 40, the critical degree of polymerization of the surface non-polar polymer is 80, and the critical degree of polymerization of the weakly polar polymer is between the two. In addition, special attention should be paid to the improvement of the degree of polymerization, and the mechanical strength is also increased, but when the degree of polymerization is more than 200 to 250, the mechanical strength of the polyethylene sheet is not increased. In addition, when the degree of polymerization reaches 600 to 700, the strength of the polyethylene sheet is no longer significantly increased as the molecular weight increases. Therefore, we should choose the most suitable molecular weight to get better mechanical properties.