Process for providing dyed nylon fibers with resistance to staining and fading

Abstract

Dyed nylon fibers are provided with resistance to (a) staining from neutral colorants and anionic colorants and (b) fading from chemical agents.

1 . A process for providing nylon fibers with resistence to staining from neutral colorants and anionic colorants, wherein the process comprises the steps of: 
 (a) treating the nylon fibers with at least 2% weight/weight (weight dry sulfonated aromatic aldehyde condensation polymer/weight dry nylon fibers) of sulfonated aromatic aldehyde condensation polymer and    (b) fixing the treated nylon fibers by a wet heat method.    
     
     
         2 . A process as defined by  claim 1  wherein the nylon fibers are selected from the group consisting of acid dyeable nylon fibers and cationic dyeable nylon fibers.  
     
     
         3 . A process as defined by  claim 1  wherein the nylon fibers are selected from the group consisting of acid dyed acid dyeable nylon fibers, acid dyed cationic dyeable nylon fibers, solution dyed acid dyeable nylon fibers and solution dyed cationic dyeable nylon fibers.  
     
     
         4 . A process for providing dyed nylon fibers with resistence to fading from chemical agents, wherein the process comprises the steps of: 
 (a) treating the dyed nylon fibers with at least 2% weight/weight (weight dry sulfonated aromatic aldehyde condensation polymer/weight dry nylon fibers) of sulfonated aromatic aldchyde condensation polymer and    (b) fixing the treated nylon fibers by a wet heat method.    
     
     
         5 . A process as defined by  claim 4  wherein the dyed nylon fibers are selected from the group consisting of acid dyed acid dyeable nylon fibers and acid dyed cationic dyeable nylon fibers.