| 摘要 |
PURPOSE:To polish the surface of short thermoplastic fiber-containing rubber structure without softening and melting the short fibers. CONSTITUTION:Some part of or the whole surface 1a of short fiber-containing rubber structure after vulcanization is polished with grindstone such as diamond wheel or the like at the relative speed difference of 500-1,000m/min. Thus, rubber is cut off under the condition that the short thermoplastic fibers having high elasticity are left behind. At the polishing, the surface 1a is forcibly cooled down so that the surface temperature of the surface 1a is equal to or lower than the softening temperature of the short fibers 4 so as not to soften and melt the short fibers 4. |
