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US 12,024,818 B2Granted
Method of manufacturing artificial leather
AssigneeMario Levi S.P.A.
InventorMarco Bramardi
Life of this patent
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Abstract
A method of manufacturing artificial leather is provided. A textile support is provided coated with coagulated polyurethane on which colored and uncolored base coats are applied, interspersed with drying steps, and then embossed to impart an aesthetic design in relief. On the embossed semi-finished product, colored and non-colored finishing coats are applied.
Claims6
A method of manufacturing artificial leather, the method comprising:
- providing a textile support coated with a polyurethane coagulate;
- applying at least one first colored base coat on the textile support, and causing the at least one first colored base coat to dry;
- optionally applying a second colored base coat to the at least one first colored base coat and causing the second colored base coat to dry;
- applying an additional base coat comprising a fixative, to the at least one first dried colored base coat or to the second dried colored base coat, if provided, and causing or allowing the additional base coat to dry, thereby obtaining a semi-finished product
- embossing the semi-finished product by imparting a relief design resembling natural leather, thereby obtaining an embossed semi-finished product;
- applying a first colored finishing coat on the embossed semi-finished product;
- causing the first colored finishing coat to dry;
- applying a second colored finishing coat over the first dried colored finishing coat;
- causing the second colored finishing coat to dry;
- applying, on the second dried colored finishing coat, an additional fixative coat, and
- causing or allowing drying of the additional fixative coat;
- wherein each said step of causing the base coats, the finishing coats, and the additional fixative coat to dry involves a respective passage of the textile support through one or more drying tunnels, to cause crosslinking of the polyurethane coagulate and each coating, the drying temperature in each respective one or more drying tunnels ranging from 85° C. to 115° C.;
- and
- said base and finishing coats are applied by spraying, feeding the textile support through one or more spraying booths comprising one or more carousels moved in circular motion, the one or more carousels having a plurality of spray guns.
11 more elements
Dependencies are inferred from the claim text.