| 摘要 |
<p>To provide a PTFE granular powder containing no filler which has a large apparent density, a small average particle size, a narrow particle size distribution, a small electrostatic charge, a small angle of repose and an excellent powder flowability, and a process for preparing the same. The granular powder is prepared by granulation of a PTFE powder in water with stirring in the presence of an organic liquid forming liquid-liquid interface with water and a nonionic and/or anionic surfactant. A molded article obtained from the granular powder is excellent in tensile strength and elongation and has a small surface roughness, a high electrostatic charge and a high whiteness (Z value). <IMAGE></p> |
