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US 4,342,805 AGranted
Simulated leather sheet material
AssigneeNorwood Industries Inc.
InventorJohn McCartney
Life of this patent
Estimating the term…
Abstract
A simulated leather sheet material is comprised of a polymer impregnated fibrous mass with a grain layer forming one surface and a split layer forming the opposing surface. The grain layer has an actual density equal to its bulk density and the split layer has a bulk density less than its actual density. The sheet material has a density decreasing from the grain layer to the split layer.
Claims11
A simulated leather sheet material comprising:
- a polymer impregnated fibrous mass with a grain layer forming one surface, the grain layer having an actual density equal to its bulk density and a split layer forming the opposing surface, the grain layer being a composite of fibers in a continuous resin matrix, the split layer having a bulk density less than its actual density, the split layer having coated and uncoated fibers, masses of polymer and voids, said sheet material having a density decreasing from the grain layer to the split layer, wherein the ratio of fiber to polymer is uniform throughout said sheet material.
A method of forming a simulated leather sheet material comprising:
- uniformly impregnating a fibrous mass with a polymer to form a porous sheet material;
- heating the porous sheet material under heat and pressure, said heat and pressure being applied to at least one surface thereof, to develop a simulated leather sheet material having a grain layer on the surface to which the heat has been applied, the grain layer having a bulk density equal to the actual density, said grain layer being a composite of fibers in a continuous resin matrix, a split layer having a bulk density less than its actual density, said split layer having coated and uncoated fibers, masses of polymer and voids, the sheet material having a density decreasing from the grain to layer to the split layer and wherein the ratio of fiber to polymer is uniform throughout said sheet material.
Dependencies are inferred from the claim text.