| 摘要 |
PURPOSE:To eliminate the unpleasant squeaks and wear of an image supporting body when a cleaning blade is used and, at the same time, to improve the cleaning effect of the blade, by forming the blade of a main body section and slide-contacting section which are united to one body and forming the main body section of an elastic member and, at the same time, the slide-contacting section of an urethane rubber-based material, which is excellent in wearing property, mixed with a specific quantity of fluorocarbon resin powder. CONSTITUTION:The cleaning blade of this invention is composed of a contacting section 14 containing an edge which is in contact with the surface of an image supporting body and a main body section which is firmly fixed to the contacting section 14 under united conditions and elastically supports the contacting section 14. The contacting section 14 is made of urethane rubber mixed with 20-60pts.wt. fluorocarbon resin powder based on 100pts. wt. urethane rubber. It is recommended to use the powder of polyvinylidene fluoride resin which is excellent in compatibility with the urethane rubber as the fluorocarbon resin powder to be mixed with the urethane rubber and use the powder of -10mum from the points of dispersibility and moldability. The main body section 12 and slide-contacting section 14 of this blade 10 are formed as an integrally cast product by using the urethane rubber which can be liquid-cast as the base material. The blade 10 is supported by and fitted to a metallic holding member 20 and used under conditions where the contacting section 14 is brought into pressure-contact with the surface of the picture supporting body 30 with a prescribed pressing force. |
