UHMWPE marine fender face pads performance introduction:
1. High wear resistance: Among all the engineering plastics at present, the high molecular weight polyethylene liner has the best wear resistance and is the most eye-catching. The higher the molecular weight, the more wear-resistant the material, even more than many metal materials (such as carbon steel, stainless steel, bronze, etc.). For example, UHMW-PE pipe has a service life of 4-6 times that of steel pipe under strong corrosion and high wear conditions, and improves the conveying efficiency by 20%. It fully demonstrates the advantages of "energy saving, environmental protection, economy and high efficiency".
2. Corrosion resistance: It is not corroded in lye, can be used in concentrated hydrochloric acid at 80°C, and has stable performance in 75% concentrated sulfuric acid and 20% nitric acid. It is also stable to seawater and liquid detergents.
3. Low coefficient of friction: The coefficient of static friction is 0.07 and the self-lubricating property is good. It is an ideal material for bearings, bushings, sliders and linings. Selecting UHMW-PE as the friction part of the equipment can not only improve the wear-resisting life, but also save energy.
4. Impact resistance: The impact resistance ranks first in plastics. Whether it is a strong external impact or internal pressure fluctuations, it is difficult to make it crack. Its impact strength is 10 times that of nylon 66, 20 times that of polyvinyl chloride, and 8 times that of polytetrafluoroethylene; especially in low temperature environments, its impact strength has reached the highest value, and its flexibility can provide extremely safe and reliable delivery systems. guarantee.
5. Anti-aging: stable performance, can be buried on the ground or underground, and will not age for 50 years. Measured according to ASTM method (load 4.6㎏/cm2), the heat distortion temperature is 85℃, and the service temperature can reach 90℃. In special cases, it is allowed to use at higher temperature. UHMW-PE is a material with excellent toughness, and its low temperature resistance is also very good. It still has a certain ductility at a low temperature of -269 °C, and there is no sign of embrittlement. However, the coefficient of linear expansion is large and the thermal conductivity is very poor, so full attention should be paid when designing products.
6. Electrical properties: large volume resistance, breakdown voltage of 50KV/mm, and dielectric constant of 2.3. In a wide temperature and frequency range, it is suitable for use as a structural material in electrical engineering.
7. Hygienic and non-toxic: UHMW-PE is tasteless, non-toxic, odorless, non-corrosive, and has physiological inertia and physiological adaptability. It is approved by the U.S. Food and Drug Administration (FDA) and the U.S. Department of Agriculture (USDA) for use in contact with food and drugs. High molecular weight polyethylene sheets have many excellent properties.