Modification of Wool by the Application of Linear Synthetic Polyamides
1954
Jackson, D.L.C.
N-alkoxymethyl polyamides may be applied to wool from aqueous dispersions containing a surface-active agent. If an anionic agent is used, the resin can be deposited on the wool by the addition of acid. For efficient deposition, the resin-detergent ratio must be chosen such that: (a) the net charge on the resin-detergent particles is opposite in sign to the charge on the fiber surface, and (b) the amount of detergent is insufficient to interfere with the nonfelting action of the resin. Using a sodium secondary-alkyl sulfate as anionic detergent and a resin-detergent weight ratio of 20 :1, ethoxymethyl nylon has been applied to wool fabric from aqueous dispersions at approximately pH 2.5. The felting shrinkage of the fabric can be reduced appreciably by depositing about 6% resin on it in this way.
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