| 摘要 |
In a process for making a leather-like sheet by impregnating a fibrous substrate with a polyurethane emulsion, heat gellable polyurethane emulsion having a specific modulus of elasticity is employed as the polyurethane emulsion, and either of following methods (1) and (2) is also employed:(1) before impregnation of the polyurethane emulsion, the fibrous substrates are pretreated with a surfactant having a function of inhibiting adhesion between fibers and polyurethane(2) in addition to the above modulus of elasticity, the polyurethane emulsion has a specific alpha dispersion temperature, the fibrous substrates are composed of microfine fiber-forming fibers, and after coagulation of polyurethane emulsion, the fibers are converted to microfine fibers.The leather-like sheets obtained according to this invention exhibits natural leather-like softness and hand touchness as well as excellent physical properties such as bending fatigue resistance.
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