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PROCESS FOR THE TREATMENT OF SKINS, LEATHERS OR COLLAGEN-CONTAINING SHEET MATERIALS USING A PRESSURIZED DENSE FLUID.
PROCESS FOR THE TREATMENT OF SKINS, LEATHERS OR COLLAGEN-CONTAINING SHEET MATERIALS USING A PRESSURIZED DENSE FLUID.
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机译：使用加压的稠密流体处理叶片，皮革或含胶原蛋白的板材的方法。
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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.
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