Overdyeable pigmented polymeric fiber and yarns and articles...

Details Overdyeable pigmented polymeric fiber and yarns and articles... Overdyeable pigmented polymeric fiber and yarns and articles...

2008-01-22

2008-01-22

Douyon, Lorna M. (Department: 1751)

Plastic and nonmetallic article shaping or treating: processes

With incorporating dye susceptible material or dyeing workpiece

C008S404000, C008S445000, C008S550000, C008S618000, C008S636000, C008S637100, C008S924000

Reexamination Certificate

active

10786685

ABSTRACT:
Dyed yarns typically have inferior color fastness compared with pigmented yarns. However, dyeing offers a virtually infinite selection of colors, flexibility and more uniformity than constructions of pigmented yarns in residential carpet and other yarn applications, such as apparel. It has been found that relatively small amounts of pigment (10 to 1000 ppm) incorporated into polymeric fibers, and particularly nylon fibers used in carpets, creates lightly pigmented yarns which, when overdyed, are highly uniform and have a higher degree of apparent dye light fastness compared to normal dyed yarns. This effect is observable for both anionic and cationic polyamide polymers, and dyeing of these slightly pigmented yarns can be conducted to produce yarns of almost any color of greater depth than the base yarn.

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