| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing fibrous composite sheets, while suppressing organic solvent emission into the air and energy consumption, having a combination of flexibility with firm texture and intended for artificial leathers with dense and uniform structure. SOLUTION: This fibrous composite sheet is produced by the following process: a nonwoven fabric with heat-shrinkable fiber as at least one component is impregnated with a water-based polymeric elastomer emulsion having heat- sensitive coagulation tendency followed by making a treatment in a high- temperature and high-humidity atmosphere, i.e., at a temperature higher than both the shrink-beginning temperature of the heat-shrinkable fiber and the heat-sensitive coagulation temperature of the polymeric elastomer emulsion and at a relative humidity of >=80%, to simultaneously perform the shrinkage of the nonwoven fabric and the heat-sensitive coagulation of the polymeric elastomer emulsion. By virtue of the above process, the objective high-quality fibrous composite sheets can be produced environmentally friendly. |
