METHOD FOR PRODUCING HEAT-TREATED VINYLIDENE FLUORIDE POLYMER POWDER

The invention provides a process for producing vinylidene fluoride polymer powder that exhibits excellent solubility with respect to aprotic polar solvents, and a process for producing a vinylidene fluoride polymer solution using vinylidene fluoride polymer powder obtained by the polymer powder production process. The process for producing heat-treated vinylidene fluoride polymer powder according to the invention includes heat treating raw vinylidene fluoride polymer powder at such a temperature that the temperature of the polymer powder is not less than 125°C to less than the crystal melting temperature (Tm) of the polymer.