| 摘要 |
PURPOSE:To obtain a soft substrate, rich in roundness, hardly causing breakage and creases and useful for artificial leathers by carrying out needle punching treatment of nylon fiber, having a specific number of crimps and constructing a nonwoven fabric so as to provide a specified number of crimps. CONSTITUTION:A web composed of nylon fiber having 22-33 peaks/25mm number of crimps is subjected to needle punching and entangling treatment so as to provide 12-16 peaks/25mm number of crimps. The resultant nonwoven fabric is then impregnated with a polyurethane elastomer and wet coagulated to afford the objective soft substrate, having a homogeneous density in the thickness direction, excellent in surface smoothness, hardly causing breakage and creases and useful for artificial leathers. |
