| 摘要 |
<p>1533123 Synthetic suede-like material MINNESOTA MINING & MFG CO 14 Oct 1975 [15 Oct 1974] 42067/75 Heading B2E A method of making a suede-like polymeric sheet comprises (a) coating a polymer coating composition on to the surface of a substrate, said coating composition comprising a solution of elastomeric polyurethane in solvent, (b) completely covering the polymer coating with a layer of removable particles having an average particle volume of 7 x 10<SP>-8</SP>-6.5 x 10<SP>-5</SP> cm<SP>3</SP>, (c) solidifying the polymer coating and removing the solvent from the coating, (d) removing particles from the polymer coating to provide voids in said coating and (e) drying the resulting suede-like sheet.</p> |
