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HDPE,PP.UPE(UHMWPE)are approved can be used in faintish acid and alkali environment (30% CuCl2 solution and 30% NAOH solution is tested ok).Such bearings can operate in liquid and contamination sensitive environments as acid/alkali/salt/imprequant/oil/gas/seawater.have general performance of lubrication and maintenance free, none magnetism,anti-rust and eroded of plastic bearings.But these bearings have not strong mechanical strenth.and easy to be out of shape,so couldn't used in heavy load and high speed aplication.among these 3 material,UPE more excellent strength and low friction and could be used to lower temperature(lowest to -150℃), Generally the rings and cage made with HDP.PP or UPE, balls made with glass stainless or ceramic
