Patent ID: 7896997

Claim:
A method of manufacturing a composite sheet for artificial leather, the method comprising: providing a sea-island, non-woven fabric layer consisting of composite short fibers having a sea component and an island component, said composite short fibers having a fineness of less than 0.3 denier; extracting the sea component from the island component of the sea-island non-woven composite short fibers; providing a sea-island woven or knitted composite filament having a sea component and an island component, said composite filament having a fineness not more than the fineness of the island component of the non-woven composite short fiber after said extracting of the sea component of non-woven composite short fiber; needle punching the non-woven composite short fibers with the woven or knitted composite filament to form a manufactured composite sheet and impregnating the manufactured composite sheet with a polyurethane solution, coagulating the impregnated composite sheet in an aqueous solution, and extracting sea components existing in the coagulated composite sheet.