| 摘要 |
<p>A process for the production of artificial leather which comprises coating or impregnating a fibrous base material for the production of artificial leather with an aqueous emulsion of a polymer exhibiting elasticity in a solid state and subjecting the resulting base material to both wet heat (utilizing heat of water vapor) and irradiation with microwave to solidify the emulsion. As this process can dispense with an organic solvent, it is friendly to the environment, is reduced in the migration as compared with the conventional dry-heat solidification processes using hot air, and can give an artificial leather which has distinct voids (noncontact areas) indispensable to the feeling of artificial leather between the fibers of the base material and the polymer incorporated into the material, is excellent in air permeability by virtue of innumerable extremely fine pores formed when the water vapor generating in the solidification passes therethrough, and contains pores also in the polymer solidified in the base material. This process can dispense with also the shrinking step which has been essential in the prior art, thereby simplifying the production process, and can be shortened in the processing time so as to enhance the production efficiency.</p> |
