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AssigneeStatni vyzkumny ustav kozedelny
InventorsEduard Muck, Josef Horak, Jaroslav Strachota, deceased, Jiri Boleslav, Lubomir Grygera, Ladislav Bogdanovicz, Otto Hvezda
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A process for the manufacture of artificial leather which has a napped, suede or nubuck surface finish by contacting a natural, synthetic of semi-synthetic backing member with a polymeric system comprising a mixture of a heat-reactive latex and a carboxylated latex and which contains at least one dyestuff. Each of the latices is cross-linked in sequence while the contacted backing member is dried. The migration of non-polymeric components in the system of latices is suppressed during drying. The backing so treated is mechanically altered on the grain side of the backing member to provide an irregular leather-like surface thereto.
A process for the manufacture of artificial leather and for imparting a napped, or nubuck grain finish thereto comprising the steps of providing a backing member comprising a matrix of crossing strands of fibers, contacting at least one side of said backing member with a polymeric system comprising a mixture of a heat-reactive latex and a carboxylated latex, the latter being self-cross-linkable at a more rapid rate than the former under application of heat, at a temperature in a range of about 60.degree.C. to about 135.degree.C., subjecting said contacted backing member to a temperature within said range for a period of time to effect sequential cross-linking of said carboxylated latex about the points of crossing of said strands and of said heat-reactive latex about said cross-linked carboxylated latex and drying of the contacted backing member, and thereafter buffing said one side in two steps, the direction of the second buffing step being shifted an angle of 180.degree. from the first buffing step thereby mechanically altering said one side of the dried backing member to provide an irregular leather-like surface thereto consisting of elongated fibers from said backing member and shorter villi of said cross-linked, heat-reactive latex.
An artificial leather comprising a fabric base having crossing strands of fibers, wherein a carboxylated latex is cross-linked at the intersection of said crossing strands to bind the fabric together, and a heat-reactive latex is cross-linked about said cross-linked, carboxylated latex, and having elongated fibers from said base and shorter villi of said cross-linked, heat-reactive latex extending from the plane of said fabric to provide an irregular leather-like surface having a napped finish.
Dependencies are inferred from the claim text.