D - Textiles – Paper – 06 – P
Patent
D - Textiles, Paper
06
P
8/93.18
D06P 1/92 (2006.01) D02G 1/00 (2006.01) D06B 9/02 (2006.01) D06C 7/02 (2006.01)
Patent
CA 1082402
Abstract of the Disclosure A process is disclosed for the rapid, continuous and waterless dyeing of textile and plastic materials in which the dyestuff is dissolved, suspended or dispersed in a high boiling solvent, such as glycol or glycol ether, for carrying out the dyeing step per se, after which the dyed textile or plastic ma- terial (after cooling if desired) is subjected to a washing with a low boiling organic liquid such as methanol or ethanol (prefer- ably the former) or a chlorinated hydrocarbon solvent, and sub- sequently dried. The entire series of operations is carried out under nonaqueous or substantially nonaqueous conditions with the complete or substantially complete recovery and recycling of the used dyestuff, the used high boiling solvent, and the used low boiling organic wash liquid. In this way the entire operation is conducted in a relatively inexpensive fashion and in a completely or substantially completely closed cyclic system with essentially complete recovery and reuse of the treating liquids so that not only is the cost of the overall operation greatly minimized but also without any need for pollution of natural water resources such as rivers and wells such as has in the past taken place to a more or less serious extent where effluents of a substantially aqueous nature, but containing serious amounts of polluting sub- stances, were discharged into rivers and the like thereby creating environmental problems. In the case of textile materials such as woven or knitted fabrics, texturizing and heat-setting thereof may be effected simultaneously with the dyeing operation either to a relatively smaller extent due to the natural moisture pickup of the starting textile material, or to a relatively greater [and predetermined) extent by first incorporating in the textile material a still greater amount of a liquid texturizing agent (e.g., water or methanol) in an amount on the order of 10 to 60% by weight. Finally, one may omit the dyestuff during the last- mentioned procedure and in that way bring about an excellent texturizing and heat-setting, only, of the textile material.
276337
Gowling Lafleur Henderson Llp
Martin Processing Inc.
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