| 摘要 |
<p>A process for producing an aqueous dispersion of polytetrafluoroethylene (PTFE) in which C9F19COONH4 or the like is used as a surfactant. The dispersion is coagulated to obtain a fine PTFE powder, which is subjected to paste extrusion. The extrudate is stretched at 250 °C or higher to obtain a porous object.</p> |
