Polytetrafluoroethylene molded article and manufacturing method thereof

An object of the present invention has less voids and grain boundaries is to efficiently obtain a superior PTFE molded article in mechanical strength and sealing property. The present invention is, after creating the sintered PTFE by sintering to preformed polytetrafluoroethylene [PTFE] powder, of three hundred thirty to three hundred and ninety ° C. under a pressure of 0.5~29.4MPa the sintered PTFE a method for producing a PTFE molded article, which comprises heating at a temperature.