THERMOPLASTIC FLUOROPOLYMERS

摘要

There is described a polymer composition comprising a mixture of polymers. Component (A) comprises (co)polymers based on chlo-rotrifluoroethylene (PCTFE) containing at least 99% by moles of chlorotrifluoroethylene (CTFE), the complement to 100 being one or more fluorinated or non-fluorinated monomers or based on CTFE homopolymer. Component (B) comprises (co)polymers based on ethylene/chlorotrifluoroethylene (ECTFE) and/or ethyle-ne/tetrafluoroethylene (ETFE) optionally containing one or more fluorinated or non-fluorinated comonomer wherein the E:CTFE (or TFE) ratio by moles is between 1:3 and 3:1. The polymer composition has improved mechanical properties in combination with low permeability to gases and water vapour rendering the composition useful to obtain, in particular, films used in the food and pharmaceutical industry.