| 摘要 |
PURPOSE:To improve antifriction, lubricating ability and cleaning property of the titled blade by coating the surface of a substrate composed of an urethane rubber with a specific perfluoropolyether. CONSTITUTION:The surface of the substrate composed of the urethane rubber is coated with the perfluoropolyether which contains a main structural unit shown by -CxF2x-O- (wherein X is an integer of 1-4), and has isocyanate, hydroxy, carboxyl or amino group on at least one of end groups of the perfluoropolyether. Thus, the antifriction, the lubricating ability and the cleaning property of the titled blade are improved sufficiently, maintaining sharpness and resiliency of the edge part of the titled blade. |
