Method for the production of thermal fixing roller.

摘要

The present invention relates to method for the production of a thermal fixing roller which comprises a step of tubularly coating the periphery of a core shaft (1) with a silicone rubber layer (2) thereby forming a roller, a step of immersing the roller in a polytetrafluoroethylene resin dispersion (6), pulling the roller out of the dispersion (6) by rotating, including slightly in the same direction to the horizontal plane and drying the wet roller thereby forming a polytetrafluoroethylene resin coat (4) on the roller, a step of heating the polytetrafluoroethylene resin coat (4) on the roller from outside at a temperature of 500 DEG C or more for a period of 10 to 120 seconds, a step of heating the roller from inside thereby elevating the temperature of the polytetrafluoroethylene resin coat (4) to a level of 230 DEG C or more and less than the melting point of the resin, and a step of subsequently heating the polytetrafluoroethylene resin coat (4) to a temperature of the melting point thereof or more thereby baking the coat (4).