| 摘要 |
Provided is a method for producing an ethylene-tetrafluoroethylene copolymer powder, whereby it is possible to simply and inexpensively produce an ethylene-tetrafluoroethylene copolymer powder excellent in handling efficiency from a slurry having an ethylene-tetrafluoroethylene copolymer dispersed in a fluorinated organic solvent. A method for producing an ethylene-tetrafluoroethylene copolymer powder, which comprises feeding, at a feeding linear velocity exceeding 0.10 m/sec., a slurry having ethylene-tetrafluoroethylene copolymer microparticles dispersed in a specific fluorinated organic solvent, to a centrifugal thin-film evaporator 12 having a cylindrical heat-conducting barrel 34, a first heating portion 44 for heating the heat-conducting barrel 34, and a rotary stirring portion 42 wherein a rotary shaft 38 is provided with stirring blades 40 for rotation in the heat-conducting barrel 34 so that a thin film is formed on the inside wall surface 34a of the heat-conducting barrel 34, to obtain an ethylene-tetrafluoroethylene copolymer powder. |
