Methods for preparing agglomerated pellets of polytetrafluoroethylene and molded articles and the agglomerated pellets of polytetrafluoroethylene and molded articles prepared thereby
申请人:Asahi Glass Fluoropolymers USA, INC.
公开号:US20030229167A1
公开(公告)日:2003-12-11
PTFE pellets with good bulk density, homogeneity, and flowability properties may be obtained by:
(1) wetting a PTFE powder with a solvent, to obtain a wetted PTFE powder;
(2) forming the wetted PTFE powder into agglomerated pellets of PTFE; and
(3) drying the agglomerated pellets of PTFE pellets,
in which the drying of the agglomerated pellets of PTFE is carried out in a fluidized bed drier. The PTFE pellets so obtained may be used to prepare molded articles of PTFE.
可通过以下方法获得具有良好体积密度、均匀性和流动性的聚四氟乙烯颗粒:
(1) 用溶剂润湿聚四氟乙烯粉末,得到润湿聚四氟乙烯粉末;
(2) 将润湿的聚四氟乙烯粉末制成聚四氟乙烯团粒;以及
(3) 干燥聚四氟乙烯团粒、
其中聚四氟乙烯团粒的干燥在流化床干燥器中进行。这样得到的聚四氟乙烯颗粒可用于制备聚四氟乙烯模塑制品。