Treatment of dyed nylon fibers to prevent degradation caused by ultraviolet light
AssigneeBurlington Industries, Inc.
InventorMichael E. Bell
Life of this patent
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Abstract
A process for arresting or attenuating ultraviolet induced damage to nylon fibers comprising dyeing cationic dyeable nylon fibers at a pH of about 2.5 or less with an acid dye, a fiber reactive dye or premetallized acid dye and, subsequent to exposing said fibers to fiber damaging amounts of ultraviolet light, applying a neutralizing aqueous solution having a pH of about 7.5 or greater to said fibers, thereby arresting or attenuating ultraviolet induced damage to said nylon fibers. The nylon fibers may be in a carpet which may be treated after installation.
Claims4
A process for arresting or attenuating ultraviolet induced damage to nylon fibers comprising:
- dyeing cationic dyeable nylon fibers at a pH of about 2.5 or less with a premetallized acid dye;
- and
- subsequent to exposing said fibers to fiber damaging amounts of ultraviolet light, applying a neutralizing aqueous solution having a pH of about 7.5 or greater to said fibers thereby arresting or attenuating ultraviolet induced damage to said nylon fibers.
A method for arresting or attenuating ultraviolet induced damage to nylon fibers, which have been dyed at a pH of about 2.5 or less with an acid dye, a premetallized acid dye or a fiber reactive dye, after installation of a carpet containing said fibers, comprising the steps of;
- subsequent to exposing the fibers of the installed and dyed carpet to fiber damaging amounts of ultraviolet light, applying a neutralizing aqueous solution having a pH of about 7.5 or greater to said fibers in the installed carpet thereby arresting or attenuating ultraviolet induced damage to the nylon fibers of the installed carpet.
Dependencies are inferred from the claim text.