Patent ID: 7025915
Filing Date: 2006-04-11
Classification: D01D,D01F,D06N

Abstract:
1. A method for producing an artificial leather, comprising: preparing an island polymer and a sea polymer having a different dissolving and removing property from that of said island polymer, wherein a ratio (D) of melt flow index (MI) of said sea polymer to relative viscosity (RV) of the island polymer ranges from about 20 to about 55, the relative viscosity (RV) of said island polymer ranges from about 2.7 to about 3.5, and the weight percentage of said sea polymer relative to the sum of said sea polymer and said island polymer ranges from about 30% to about 70%; mixed spinning the island polymer and the sea polymer at a predetermined temperature to produce a fiber having a fineness of about 2 to about 10 denier per filament, wherein said islands in said fiber has a fineness ranging from about 0.01 to about 0.05 denier per filament and from about 0.05 to about 0.5 denier per filament, said islands having a fineness ranging from about 0.01 to about 0.05 denier per filament has a ratio of perimeter of island/perimeter of fiber ranging from 0.01 to 0.05. and said islands having a fineness ranging from about 0.05 to about 0.5 denier per filament has a ratio of perimeter of island/perimeter of fiber ranging from 0.05 to 0.15; producing a non-woven fabric substrate from said fiber; forming an artificial semi-finished leather by immersing said non-woven fabric substrate into a polymer; and dissolving and removing said sea polymer in said artificial semi-finished leather; and polishing a surface of said artificial semi-finished leather.