Patent ID: 8715559

Claim:
A method for producing an expanded tetrafluoroethylene resin molded article, comprising: a fusing step of fusing a tetrafluoroethylene resin by heating the tetrafluoroethylene resin to a melting temperature thereof or higher, the tetrafluoroethylene resin, when heated to 365° C., then cooled to 305° C. with a rate of −1° C./min, then further cooled to 245° C. and heated to 365° C. with a rate of 10° C./min, having a heat of fusion which, within a range from 296 to 343° C., is equal to or larger than 32 J/g and less than 47.8 J/g, by heating to a melting temperature thereof or higher; a step of cooling, after the step of fusing, the fused tetrafluoroethylene resin at a rate of −3° C./min or slower; a step of holding, after the step of cooling or during the step of cooling, at a temperature equal to or higher than 313° C. and lower than 321° C. for 10 minutes or longer; and a step of expanding, after the step of cooling and the step of holding, the tetrafluoroethylene resin obtained by the steps of fusing, cooling and holding.