| 摘要 |
<p>A frictional material is made of cloth which is impregnated with an impregnating agent such as a bituminous material, synthetic resin, etc. The cloth is woven by a multiple yarn made by twising single yarns optionally with reinforcing metal wires. The single yarn consists of a central core in the form of a robing or a yarn of inorganic fibers such as glass fibers, rock wool, ceramic fibers, etc. and a covering element in the form of a sliver of organic fibers such as staple fibers, aromatic polyamide fibers, flame-resistant fibers, etc. The frictional material obtained is excellent in physical strength and in resistance against heat, effective for preventing dispersion of dust and irritation to human bodies, and advantageous from the viewpoint of cost.</p> |
