... It can substitute for imported polishing pad like LP66,LP77,LP26 and LP57, applicable to ... of large specification polishing pad in China. At present, the largest size is 1680mm ... is made of pure polyurethane, no abrasive material content, it is more rigid than LD66/77, mainly be used for ... for silicon, germanium and other single wafer of semiconductors. Best quality for optic glass used of polishing ...