HDPE,PP.UPE(UHMWPE) are approved can be used in faintish acid and alkali environment (30% CuCl2solution and 30% NAOH solution is tested ok). Such bearing can operate in liquid and contamination sensitive environments as acid/alkali/salt/imprequant/oil/gas/seawater. They have general performance of lubrication and maintenance free, none magnetism, anti-rust and anti-eroded of plastic bearings. But these bearings have not strong mechanical strength. And easy to be out shape, so they couldn’t used in heavy load and high speed application.
Among these 3 kinds of materials, UPE has more excellent strength and low friction and could be used to lower temperature(lowest to-150℃). Generally the rings and cage are made of HDPE.PP or UPE, balls are glass stainless or ceramic ones.
