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.
本发明提供了一种生产
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四氟乙烯共聚物粉末的方法,通过该方法可以简单而廉价地从在含
氟有机溶剂中分散有
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四氟乙烯共聚物的浆料中生产出处理效率极佳的
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四氟乙烯共聚物粉末。
一种生产
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四氟乙烯共聚物粉末的方法,包括以超过 0.10 米/秒的进料线速度进料、一种生产
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四氟乙烯共聚物粉末的方法,包括以超过 0.10 米/秒的进料线速度, 将分散在特定含
氟有机溶剂中的
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四氟乙烯共聚物微颗粒浆料,送入具有圆柱形导热筒 34、用于加热导热筒 34 的第一加热部分 44 和旋转搅拌部分的离心薄膜蒸发器 12、和旋转搅拌部分 42,其中旋转轴 38 上装有搅拌叶片 40,用于在导热筒 34 中旋转,以便在导热筒 34 的内壁表面 34a 上形成薄膜,从而获得
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四氟乙烯共聚物粉末。