PROCESS FOR SOLVENT-FREE COATING OF SUBSTRATES

1. Process for the solvent-free coating of textiles, leather or split leather with a sheet having a polyurethane foam base, wherein one surface of the foam is heated beyond its softening point by means of an infrared filed or a flame and is then laminated with the substrate to be coated, the softene...

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Bibliographische Detailangaben
Hauptverfasser:	WEBER, KARL-ARNOLD, WALTER, KURT, PROCHASKA, HELMUTH
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR LAUNDERING LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TEXTILES TRANSPORTING TREATMENT OF TEXTILES OR THE LIKE WALL, FLOOR OR LIKE COVERING MATERIALS, e.g. LINOLEUM,OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF AFIBROUS WEB COATED WITH A LAYER OF MACROMOLECULARMATERIAL WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	1. Process for the solvent-free coating of textiles, leather or split leather with a sheet having a polyurethane foam base, wherein one surface of the foam is heated beyond its softening point by means of an infrared filed or a flame and is then laminated with the substrate to be coated, the softened surface of the foam layer facing the substrate, characterized in that the sheet with a polyurethane foam base is a two-layered film which is composed of a) an optionnally coloured surface layer having weight of 20 to 300 g/m**2 and b) a polyurethane foam layer having a thickness of between 0,2 and 0,5 mm and a unit weight of between 500 and 800 g/l which has been produced either by stirring air into an aqueous polyurethane dispersion, followed by drying, or by hardening a reactive mixture of a relatively high molecular weight polyhydroxyl compound, a polyisocyanate and a compound which gives off a gas on heating.