Thermoplastic fluoropolymer composition

A thermoplastic fluoropolymer composition comprising:

• at least one thermoplastic hydrogen-containing fluoropolymer (polymer (A));
• and
• from 0.1 to 10% by weight of polymer (A) of at least one tetrafluoroethylene (TFE)/perfluoromethylvinylether (MVE) copolymer consisting essentially of from 8 to 18% by moles of recurring units derived from MVE and from 92 to 82% by moles of recurring units derived from TFE and having a dynamic viscosity at a shear rate of 1 rad×sec−1 of less than 6 Pa×sec at a temperature of 280° C. (polymer (B)), wherein
• the polymer (A) is a vinylidene fluoride (VdF) polymer comprising:
• (a′) at least 60% by moles of vinylidene fluoride (VdF);
• (b′) optionally from 0.1 to 15% by moles of a fluorinated comonomer selected from the group consisting of vinylfluoride (VF1), chlorotrifluoroethylene (CTFE), hexafluoropropene (HFP), tetrafluoroethylene (TFE), perfluoromethylvinylether (MVE), trifluoroethylene (TrFE), and mixtures thereof;
• and
• (c′) optionally from 0.1 to 5%, by moles based on the total amount of monomers (a′) and (b′), of one or more fluorinated or hydrogenated comonomer(s) and
• wherein polymer (B) is present as phase-separated domains having a maximal dimension not exceeding 1 μm.