Chemically assisted protein annealing treatment

D - Textiles – Paper – 06 – M

Patent

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Details

D06M 11/51 (2006.01) D06M 11/01 (2006.01) D06M 11/53 (2006.01) D06M 11/54 (2006.01) D06M 13/252 (2006.01) D06M 13/285 (2006.01)

Patent

CA 2201857

A method for treating proteinaceous materials that contain disulfide or polysulfide bonds to improve their performance at high relative humidity and when wet. The method comprises annealing the fabric at a temperature in the range of from 70 ·C to 160 ·C at a regain of between 10 % and 25 % for a period greater than about 10 minutes wherein the fabric is annealed in the presence of a gas wich enhances the disulfide interchange reaction. A further embodiment of the invention comprises annealing the fabric at a temperature in the range of from 70 ·C to 160 ·C to a regain of between 10 % and 25 % for a period greater than 10 minutes wherein the fabric has at least in part been treated with a liquid which enhances the disulfide interchange reaction. The present method is particularly applicable to keratinous materials such as for example wool, wool with reduced crystallinity, mohair, regenerated protein, or mixtures thereof.

L'invention concerne un procédé de traitement de matière protéiques comportant des liaisons disulfure ou polysulfure afin d'améliorer leur rendement dans des conditions d'humidité relativement élevée et lorsqu'elles sont mouillées. Ce procédé repose sur la renaturation du tissu à une température comprise entre 70 ~C et 160 ~C avec un taux de reprise d'humidité compris entre 10 et 25 % pendant plus d'une dizaine de minutes, le tissu étant renaturé en présence d'un gaz qui renforce la réaction d'échange de disulfure. Un autre mode de réalisation consiste à renaturer le tissu à une température comprise entre 70 ~C et 160 ~C avec un taux de reprise d'humidité compris entre 10 et 25 % pendant plus d'une dizaine de minutes, le tissu étant au moins partiellement traité au moyen d'un liquide qui renforce la réaction d'échange de disulfure. Ce procédé s'applique, notamment, à des matières kératiniques telles que la laine, par exemple, de la laine ayant une cristallinité réduite, du mohair, des protéines régénérées ou leurs mélanges.

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