Patent ID: 8273991

Claim:
A fluorocopolymer comprising tetrafluoroethylene [TFE]-derived copolymerized units and hexafluoropropylene [HFP]-derived copolymerized units, which has a following characteristics (a) and (b): (a) a thermal melting curve obtained by primary heating in differential scanning calorimetry shows a melting point within the range of 240 to 280° C. and a melting point peak portion area accounts for at least 60% of heats of fusion area; and (b) the product of a MFR (g/10 minutes) and a resin pressure (MPa) is not larger than 40, and wherein the number of —COF groups, —COOH groups, —CH 2 OH groups, —CONH 2 groups, —COOCH 3 groups and —CF 2 H groups in the fluorocopolymer is not larger than 50 per 10 6 main chain carbon atoms.