Process of forming a film of fluorine-containing resin on a metallic substrate

摘要

A process of forming a film of a fluorine-containing resin on a surface of a metallic substrate, wherein the substrate is coated with the fluorine-containing resin and is placed in a furnace vacuumized to a predetermined degree within a range containing the order of 10-3 Torr. The vacuumized atmosphere in the furnace is heated at a predetermined heating temperature of the range of from about 330 DEG C. to about 420 DEG C. for a predetermined period of time, whereupon the hot vacuumized atmosphere in the furnace is allowed to cool spontaneously with a vacuum of preferably the same degree maintained in the furnace until the temperature in the furnace reaches a predetermined pre-quenching temperature lower than the heating temperature and, thereafter, an inert gas at ambient temperature is introduced into the furnace for quenching the coating on the substrate.