PRODUCTION OF THERMAL FIXING ROLLER

摘要

PURPOSE:To prevent generation of the cracks occurring in drying and thermal deterioration of a silicone rubber layer by coating a polytetrafluoroethylene resin (PTFE) dispersion on said layer, then heating and drying the coated surface at and for a specified temp. and time and baking the coating. CONSTITUTION:After the PTFE dispersion is coated on the silicone rubber layer formed on the core shaft of the roller, the coated surface is heated and dried for 10-120sec at >=500 deg.C and is then baked. The drying temp. of the coated surface is specified to >=500 deg.C, more preferably to a 500-800 deg.C range. The reason for such limitation lies in that cracks are liable to be generated at <500 deg.C and conversely there is possibility of the thermal deterioration of the silicone rubber layer when the temp. exceeds 800 deg.C. The generation of the cracks of the PTFE coated film is thus prevented by heating and drying the coated surface under the conditions of the temp. above 500 deg.C and the short time of 10-120sec. The thermal deterioration of the silicone rubber layer is prevented as well.