Stain resistant nylon fibers
AssigneeMonsanto Company
InventorsRandolph C. Blyth, Pompelio A. Ucci
Life of this patent
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Abstract
Nylon carpet fibers are provided which resist staining by acid dye colorants at room temperature, yet are dyeable at elevated temperatures with acid dyes without losing their resistance to acid dye colorants at room temperature. The fibers are characterized by having a coating on the surface thereof comprising one or more selected compounds (stain blockers). Carpets comprising the fibers resist staining when exposed for long periods of time to spills containing acid dye colorants. By also including a fluorochemical in the coating, the carpets can resist such staining even after being subjected to heavy human trafficking.
Claims28
An undyed stain resistant nylon fiber characterized by having a coating on the surface thereof comprising one or more stain blockers in an amount sufficient to provide a fiber having a dye absorption test value at 25.degree. C. of no greater than 7% and a dye absorption value at 100.degree. C. of no less than 30%.
An undyed nylon fiber characterized by having a coating on the surface thereof comprising one or more stain blockers in an amount sufficient to provide a fiber having dye absorption test values within the range represented by the area under Curve C and above Curve E in FIG. 1.
An undyed nylon fiber characterized by having a coating on the surface thereof comprising one or more stain blockers in an amount sufficient to provide a fiber having dye absorption test values within the range represented by the area under Curve D and above Curve E in FIG. 1.
A process for improving the ability of nylon fibers to resist staining at room temperature by acid dyes while retaining their ability to be dyed with acid dyes at elevated temperatures which comprises applying a spin finish to said fibers during the melt polymerization process by which said fibers are prepared, said finish being characterized in containing one or more stain blocker(s) in an amount sufficient to provide a nylon fiber having a dye absorption value at 25.degree. C. of no greater than 7% and a dye absorption value at 100.degree. C. of no less 30%.
Dependencies are inferred from the claim text.