Explanation

Linear homopolymer of ethylene with extremely high molecular weight (greater than 1.0x10 ^ 6). Its molecular structure is similar to high density polyethylene (HDPE). The molecular chain length is 10 to 100 times that of standard grade HDPE, which is a thermoplastic engineering plastics. Industrial production uses Ziegler Natta catalyst, which is composed of ethylene or ethylene and α- It is made by polymerization of olefins. density 0.936 to 0.964 g/cm 3， The melting point is 130 to 136 ° C, the heat deflection temperature is 85 ° C, and the maximum operating temperature generally does not exceed 80 to 100 ° C. When the temperature is lower than -150 ° C, materials tends to become brittle. The mechanical properties are higher than that of high density polyethylene. It has outstanding impact resistance, stress cracking resistance, creep resistance, wear resistance and self-lubricating properties, excellent chemical corrosion resistance, fatigue resistance, noise damping, UV resistance and other characteristics. Its melt has high viscosity and is difficult to flow, so it is processed into various products by special methods. Ultra high elastic modulus and strength fibers were obtained by gel spinning, with tensile strength up to 3.3 to 3.5 GPa and tensile elastic modulus up to 100 to 125 GPa. Its fiber specific strength is the highest among all commercially available fibers so far, 4 times larger than carbon fiber, 10 times larger than wire, and 50% larger than aramid fiber. wear resistance exceeds that of carbon steel, and can replace steel product for valves, pumps, sealing fillers, textile machinery gears, belts, transmission parts, worm gear rods, bearings, bearing pads, guide rails, equipment linings, skis, artificial joint, etc. The ultrahigh strength light polyethylene fiber produced with ultra high molecular weight polyethylene can be used to manufacture bulletproof clothing, ropes, and sporting goods.

Classification