| 摘要 |
PURPOSE:To obtain a single line wire forming a spiral continuous protruding line on the surface of a filament, possessing sufficient strength and possessing together also characteristics hard to slide and easy to handle, by giving a twist on the filament after extrusion through a nozzle having an opening of an odd-shaped cross section. CONSTITUTION:A synthetic resin filament extruded through a nozzle and possesses an odd-shaped cross section corresponding to a cross section of the nozzle is once cooled, solified and made into a filament in the odd-shaped cross section of a stabilized form. Then the same is heated again and a twist is given to the same. A synthetic resin single line filament where a spiral and continuous protruding line is formed on the surface is obtained with this twisting operation, and the same is made into a long-sized wire by cooling and soldifying the same again. Bending strength of the wire can be controlled by varying a cross-sectional form and a twisting pitch. As a spiral continuous protruding line is formed on the surface, the wire possesses characteristics where the surface is hard to slide by differing from a ordinary single line filament having a smooth surface similarly to a stranded wire and knotting operation of end parts is easy also. An odd-shaped synthetic resin single filament can be produced continuously in a far simple process than that of the stranded wire. |
