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HDPE sheets are engineering thermoplastics. It combines the superior properties of most plastics, such as impact resistance, low temperature resistance, wear resistance, chemical corrosion resistance, self-lubrication, and impact energy absorption. In recent years, this new type of plastic products has been widely used in countries around the world, and the demand will increase more.
HDPE sheets have the following advantages and features:
1. High wear resistance: 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, HDPE 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 superiority 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. Very 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. Using HDPE sheets as the friction parts of the equipment can not only improve the wear-resistant life, but also save energy.
4. Impact resistance: The impact resistance ranks first in plastics. Whether it is a strong external impact or an internal pressure fluctuation, 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 properties: stable performance, good anti-aging properties, can be buried on the ground or underground, without aging for 30 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. The low temperature resistance of HDPE is also very good, and it still has a certain ductility at a low temperature of -50 °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. Hygienic and non-toxic: HDPE sheets are tasteless, non-toxic, odorless, non-corrosive, and have 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. “
