Modification of Wool by the Application of Linear Synthetic Polyamides

Abstract

The effect of surface deposits of nylon and N -substituted nylons on the abrasion-resistance and felting shrinkage of wool has been determined. N -methoxymethyl nylons are much more effective than nylon itself, when applied from solution, in increasing the abrasion-resistance of wool fabric, but not in decreasing the felting shrinkage of the fabric. If the N -methoxymethyl nylon is first applied to the wool fabric from alcoholic solution and then hydrolyzed in situ by approximately 2N HCl, the polymer is found to confer non-felting properties on the wool. A deposit of approximately 3% by weight of polymer has been found to eliminate entirely the felting shrinkage of wool fabric under the conditions of test. The optimum degree of substitution of the nylon for the production of non-feltability is between 5% and 6% combined formaldehyde, which corresponds to between 20% and 24% —NH groups substituted.The effectiveness of these polymers in increasing abrasion-resistance and decreasing felting shrinkage is explained on the basis of their adhesion to and covering power on the wool fiber.

Wool Fabric Stabilization by Interfacial Polymerization. Part I: Polyamides

“…The use of preformed polyamides and polyamide derivatives to impart shrink resistance to wool has been reported previously [6,[9][10][11][12], as has the use of synthetic polypeptides [1,3,5]. However, none of these workers used the interfacial polymerization procedure being reported here.…”

Treatment of Wool With Polyolefins

“…In most, but not all cases (see, e.g., (11]) effective polymer shrinkproofing treatments, where a preformed polymer has been applied to the wool, the polymer has subsequently been cross-linked [3][4][5][6]21]. Also, the polyethylene emulsions which could be cross-linked on curing were the only polyethylene emulsions which gave good shrinkproofing.…”

Le traitement de la laine par la caseine en vue de reduire son feutrage

“…Des travaux entrepris par JACKSON et ses collaborateurs, dès 1951 [1] avaient montré que pour améliorer d'une façon efficace la laine, une résine doit présenter un certain nombre de propriétés.…”