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AssigneeUnitika Ltd.
InventorsTsunekatsu Furuta, Ken'ichi Kamemaru, Kiyoshi Nakagawa
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A water-vapor permeable, waterproof coated fabric having a fibrous base fabric, and a porous film coated on one side of the base fabric. The porous film comprises a synthetic polymer composed mainly of a polyurethane resin and inorganic fine particles having a mean particle diameter of not more than 0.1 .mu.m. In the porous film, microcells intercommunicate in the thicknesswise direction of the film to form a honeycomb skin core structure having a diameter of 1 to 20 .mu.m. The porous film has a multiplicity of micropores having a diameter of not more than 1 .mu.m. The coated fabric has waterproof and water-vapor permeability characteristics sufficient to meet such performance characteristics required in various applications, such as rainwears, military garments, and sportswears.
A water-vapor permeable, waterproof coated fabric having a fibrous base fabric and a porous film formed by coating on one side of the base fabric, said porous film comprising:
A method of manufacturing a moisture permeable and waterproof coated fabric comprising the steps of coating on a fibrous base fabric a solution of a synthetic polymer formed mainly of a polyurethane resin which contains, relative to the solid content of the resin, more than 1% by weight of substantially non-porous inorganic fine powder particles having a mean particle diameter of not more than 0.1 .mu.m, and then immersing the coated base fabric in water to wet coagulate the resin content thereof.
Dependencies are inferred from the claim text.