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US 6,669,741 B2Granted
Process for restoring the natural appearance of para-aramid clothing
AssigneeE. I. Du Pont de Nemours and Company
InventorsPortia D. Yarborough, Hamid Moayed Ghorashi
Life of this patent
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Abstract
The visual appearance of undyed or unpigmented para-aramid fabric generally present in an article of clothing is restored by contacting the fabric with an aqueous dye solution or dispersion to dye the aramid fibrils present on the yarns. Use of a conventional washing machine is suitable in the fabric contact with the dye.
Claims14
A process for restoring the appearance of an article of clothing comprising a fabric made from yarns having undyed and non-pigmented para-aramid yarn segments having fibrils comprising the steps of:
- (a) contacting the article of clothing with an aqueous dye solution or dispersion to dye the para-aramid fibrils a color equivalent to the color of the undyed and non-pigmented yarn utilizing a washing machine employing a temperature of 40° C. to 80° C., and
- (b) drying the article of step (a).
Dependencies are inferred from the claim text.