PFA MOLDED BODY HAVING EXCELLENT BLISTER RESISTANCE AND METHOD FOR SUPPRESSING OCCURRENCE OF BLISTERS IN PFA MOLDED BODY

摘要

PROBLEM TO BE SOLVED: To provide a molded body of a copolymer (PFA) of tetrafluoroethylene (TFE) and perfluoroalkyl vinyl ether (PAVE) having excellent blister resistance, and to provide a method for suppressing occurrence of blisters.SOLUTION: Provided is a molded body obtained by heat-treating a molded body having a hollow portion at a temperature from 130°C below the melting point of the copolymer to the melting point of the copolymer, the copolymer having a hollow portion being obtained by melt-molding a copolymer (PFA) having a melt flow rate of 0.1 to 100 g/10 min when measured with a load of 5 kg and at a measurement temperature of 372±0.1°C in accordance with ASTM D1238, the PFA being a copolymer of tetrafluoroethylene (TFE) and perfluoroalkyl vinyl ether (PAVE). The PFA molded body has a hollow portion in which an abundance ratio of blisters as calculated by a formula [I] is 50% or less. Also provided is a method for suppressing occurrence of the blisters.SELECTED DRAWING: None