PROCESS FOR THE TREATMENT OF SKINS, LEATHERS OR COLLAGEN-CONTAINING SHEET MATERIALS USING A PRESSURIZED DENSE FLUID

PCT No. PCT/FR93/00960 Sec. 371 Date Jun. 2, 1994 Sec. 102(e) Date Jun. 2, 1994 PCT Filed Oct. 1, 1993 PCT Pub. No. WO94/08054 PCT Pub. Date Apr. 14, 1994.A process for the treatment of products constituted by hides and skins with a view towards their transformation into leather, and for the treatme...

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Hauptverfasser:	CARLES, MAURICE, VULLIERMET, BERNARD, GAVEND, GERARD, PERRE, CHRISTIAN
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS THEREFOR BLEACHING LEATHER OR FURS CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING,IMPREGNATING, FINISHING CHEMISTRY COMPOSITIONS FOR TANNING DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS,YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS DYEING LEATHER, FURS, OR SOLID MACROMOLECULAR SUBSTANCES INANY FORM DYEING OR PRINTING TEXTILES FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR HIDES LAUNDERING LEATHER METALLURGY PELTS SKINS TEXTILES TREATMENT OF TEXTILES OR THE LIKE TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS,FABRICS, FEATHERS, OR FIBROUS GOODS MADE FROM SUCH MATERIALS
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Zusammenfassung:	PCT No. PCT/FR93/00960 Sec. 371 Date Jun. 2, 1994 Sec. 102(e) Date Jun. 2, 1994 PCT Filed Oct. 1, 1993 PCT Pub. No. WO94/08054 PCT Pub. Date Apr. 14, 1994.A process for the treatment of products constituted by hides and skins with a view towards their transformation into leather, and for the treatment of leather which involves contacting the product with a dense, pressurized fluid, such as CO2, in the supercritical state or pressurized liquid, which optionally contains one or more active substances and a specified pressure Pi and temperature Ti, in order to provide degreasing of the skins if pure dense fluid is used, or to impregnate the products with active substances such as tanning, stiffening, dyeing or waterproofing agents. The products are subsesquently brought to atmospheric pressure to eliminate the dense fluid therefrom.