| 摘要 |
PROBLEM TO BE SOLVED: To provide a polytetrafluoroethylene-containing powder with excellent fluidity and good dispersibility into a thermoplastic resin and its manufacturing method. SOLUTION: This polytetrafluoroethylene containing powder comprises 40-70 mass% polytetrafluoroethylene (A) and a 30-60 mass% thermoplastic polymer (B) with a glass transition temperature of 40-98°C, and has a bulk density of 0.40-0.65 g/cm<SP>3</SP>. The manufacturing method comprises a step of adding a coagulant in an aqueous dispersion containing the component (A) and (B), a step of coagulating the polymer contained in the aqueous dispersion at a temperature of 20-30°C higher than the glass transition temperature of the component (B), a step of setting the coagulated product by heating for 15 minutes to 2 hours at a temperature of 30-40°C higher than the glass transition temperature of the component (B) and a step of dehydrating and drying it. COPYRIGHT: (C)2004,JPO&NCIPI
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