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US 6,746,774 B1Granted
Leather and process for its production
OwnerPhilipp Schaeferinventor
Life of this patent
Estimating the term…
Abstract
In order to provide leather with the desired cushioning properties and desirable soft handling properties, especially a grained leather with a grain structure on its upper surface, or a split leather with a surface finish, even if this leather is of minimal thickness, a foam layer is created on the non-visible underside surface of the leather. This foam layer is formed by applying a liquid plastic material containing means to create the foam and is subsequent solidified by removal of the solvent.
Claims11
A leather assembly, comprising:
- a leather selected from the group consisting of a grained leather showing a grain structure on an upper surface thereof and a split leather with a surface finish;
- and
- a coating layer on a non-visible underside surface of said leather, said coating layer being a foam layer formed by applying a liquid plastic dispersion with a solvent and subsequently setting the coating layer by removing the solvent and forming a solidified dispersion;
- said foam layer having closed cells and open cells, with said closed cells formed of hollow microspheres comprising gas-tight shells of plastic enclosing a gas, and open cells filling interspaces between said closed cells;
- said solidified dispersion having a hardness of less than 45 Shore A units and a density of less than 0.3 g/cm3;
- and
- said solidified dispersion enclosing fibers projecting from said underside surface of said leather, with individual enclosed fibers or fiber bundles individually projecting from said underside surface of said leather.
4 more elements
Dependencies are inferred from the claim text.