Excellent wear resistance, good low temperature impact resistance, self-lubricating, non-toxic, water and chemical resistance, heat resistance is better than general PE, the disadvantage is low heat resistance (heat distortion temperature), processing and forming Poor, outer surface hardness, rigidity, creep resistance is not as good as general engineering plastics, the expansion coefficient is too large. UHMWPE has poor fluidity and high viscosity in molten state. It is a rubber-like high-viscosity elastomer. It can only be formed by pressing and sintering at an early stage. It can also be processed by extrusion, injection molding and blow molding.
The mechanical properties are higher than the general high density polyethylene. It has outstanding impact resistance, stress crack resistance, high temperature creep resistance, low friction coefficient, self-lubricating property, excellent chemical resistance, fatigue resistance, noise damping, and nuclear radiation resistance.
The use temperature is 100 to 110 °C. Good cold resistance, can be used at -269 °C. The product with a density of 0.935g/cm3 and a molecular weight of 2 million has a tensile strength at break of 40 MPa, an elongation at break of 350%, a flexural modulus of 600 MPa, and a cantilever beam notched impact. The amount of wear (MPC method) is 20 mm.
Ultra-high molecular weight polyethylene rods can be used in textile, paper, food machinery, transportation, medical, coal, chemical and other sectors instead of carbon steel, stainless steel, bronze and other materials. Such as the textile industry, such as shuttles, shuttle rods, gears, couplings, sweeping rods, buffer blocks, eccentric blocks, rod bushings, swinging effects and other impact-resistant wear parts. In the paper industry, the cover plate, the wiper plate, the compacting parts, the joints, the sealing shaft of the transmission machinery, the deflecting guide wheel, the scraper, the filter, etc.; the hopper, silo, chute for the powder material in the transportation industry Lining.
Ultra high molecular weight polyethylene rods can be used for a variety of mechanical parts, including food machinery gears, worm gears, worms, bearings. Pumps, valves, baffles, filter plates in the chemical industry. Medically, it can also be used for heart valves, short surgical parts, artificial joints and birth control implants. Sports skating floors, rolling earth roads, snowboards, and snowmobile parts.
The application range is similar to that of polyamide and PTFE. The wear resistance exceeds that of carbon steel. It is used for gears, bearings, bushings, star wheels, valves, pumps, guide rails, sealing packings, equipment linings, sliding plates, artificial joints, etc. Used as bulletproof vests, ropes, etc.
Ultra-high molecular weight polyethylene has many excellent properties. However, such excellent engineering plastics are rarely known for its existence. This is mainly due to the insufficient research on the melt characteristics of ultra-high molecular weight polyethylene, and the processing method basically stays. In the backward suppression of a sintering process. In recent years, with the continuous development of ultra high molecular weight polyethylene processing technology, its products have been successfully applied in many fields.