Process for manufacturing a fluoropolymer

A method for manufacturing a fluoropolymer F comprising:

• from 45 to 95% by moles of recurring units derived from tetrafluoroethylene (TFE)
• from 5 to 35% by moles of recurring units derived from vinylidene fluoride (VDF)
• from 0.5 to 20% by moles of one or more perfluoroalkylvinylether (PAVE) of formula (I)
• CF2═CF—O—Rf (I)
• wherein Rf is a C1-C6 perfluoroalkyl group and
• wherein the molar amounts of said recurring units are relative to the total moles of recurring units in the fluoropolymer F,
• said method being a suspension polymerization reaction carried out in an aqueous medium in the presence of a radical initiator and without the addition of one or more surfactants, said method being characterized in that
• at least a portion of the suspension polymerization reaction is carried out at a temperature comprised between 10 and 130° C., and at a polymerization pressure comprised between 10 and 30 bar
• a rate of stirring is such that the Reynolds number Re=ρ·N·dI2/μ, wherein ρ is the density of water (kg/m3), N the number of revolutions per second of the impeller (1/s), dr the diameter of the impeller (m) and μ the dynamic viscosity of water (Pa·s) at the temperature of the reaction, is greater than 3000.