| 摘要 |
<p>A fine polytetrafluoroethylene powder excellent in fluidity in a powdery state, which is composed of fine particles (primary particles) having a mean particle diameter of 0.05 to 1 νm and has an apparent density of 0.52 to 0.70 g/ml, a standard specific gravity (SSG) of 2.14 to 2.23 and a secondary mean particle diameter of 100 to 1000 νm; an antidripping agent produced from this powder; a flame-retardant resin composition containing the powder; and an antidusting composition containing the powder.</p> |
