Meltable fluorine-containing resin composition

A meltable fluorine-containing resin composition comprising

• (A) a copolymer which has a molecular weight distribution peak in a lower molecular weight region and is selected from the group consisting of a copolymer of 96 to 83% by weight of tetrafluoroethylene and 4 to 17% by weight of hexafluoropropylene and a copolymer of 99.5 to 92% by weight of tetrafluoroethylene and 0.5 to 8% by weight of at least one fluorovinyl ether of the formula:
• CF.sub.2 .dbd.CF--O--R.sub.f
• wherein R.sub.f is a fluoroalkyl group having 1 to 10 carbon atoms, and
• (B) a copolymer which has the molecular weight distribution peak in the higher molecular weight region and is selected from the group consisting of a copolymer of 96 to 83% by weight of tetrafluoroethylene and 4 to 17% by weight of hexafluoropropylene and a copolymer of 99.5 to 92% by weight of tetrafluoroethylene and 0.5 to 8% by weight of at least one fluorovinyl ether of the formula:
• CF.sub.2 .dbd.CF--O--R.sub.f
• wherein R.sub.f is the same as defined above,
• which comprises 90 to 10% by weight of said copolymer (A) and 10 to 90% by weight of said copolymer (B), and
• wherein the melt viscosity of said copolymer (A) at 380.degree. C. is 5,000 to 280,000 poise, the melt viscosity of said copolymer (B) at 380.degree. C. is 25,000 to 300,000 poise, and the melt viscosity difference between said copolymer (A) and said copolymer (B) is at least 20,000 poise, wherein at least one of said (A) or (B) copolymer is a copolymer of tetrafluoroethylene and said fluorovinyl ether.