Chlorine resistant cationic dyeable carpet yarn
AssigneeBurlington Industries, Inc.
InventorWilliam G. Jenkins
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Abstract
Nylon fibers of cationic-dyeable nylon are dyed with an acid or premetalized acid dye and heatset to impart stain and bleach resistance. Stain and bleach resistant nylon carpets prepared from these fibers are also described.
Claims8
A process of dyeing and imparting improved household bleach stain resistance to cationic-dyeable nylon fibers comprising the steps of:
- (a) dyeing said fibers with an acid dye or a premetalized acid dye at a pH of from about 4.0 to 6.5 and fixing the dye into the fibers, and thereafter
- (b) heatsetting the fibers by heating the dyed fibers under dry conditions to a temperature of about 160.degree. C. to about 220.degree. C. and for a time sufficient to close the fiber crystalline structure and impart resistance to hypochlorite or peroxy-group containing aqueous solutions.
A process of preparing a stain-resistant, bleach-resistant, lightfast nylon carpet comprising dyeing cationic-dyeable nylon fibers with an acid dye or a premetalized acid dye at a pH of from about 4.0 to 6.5 and heating the dye-laden fibers to fix the dye into the fibers, and thereafter heatsetting the dyed fibers under dry conditions at a temperature of about 160.degree. C. to about 220.degree. C. for a time sufficient to close the fiber's crystalline structure and impart bleach resistance to the nylon carpet.
Dependencies are inferred from the claim text.