PFA PFA PFA MOLDED BODY WITH EXCELLENT BLISTER RESISTANCE AND METHOD OF CONTROLLING OCCURRENCE OF BLISTERS IN PFA MOLDED BODY

摘要

(Alkyl vinyl ether) having a melt flow rate of 0.1 to 100 g / 10 min as measured at a measurement temperature of 372 ± 0.1 ° C under a load of 5 kg according to ASTM D1238 There is provided a molded article having a hollow portion containing a copolymer of tetrafluoroethylene and perfluoro (alkyl vinyl ether), obtained by heat-treating a molded body having a hollow portion obtained by melt-molding a copolymer. The heat treatment is carried out at a temperature from the temperature 130 占 폚 lower than the melting point of the copolymer to the melting point of the copolymer. The shaped bodies exhibit excellent resistance to blistering under severe working conditions and when used in contact with harsh chemicals.