Processing of pigmented nylon fibers using modified polymers
AssigneeE. I. Du Pont de Nemours and Company
InventorsKetan G. Shridharani, Peter R. Witt, Perry H. C. Lin, Sundar M. Rao
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Abstract
An improved process for melt spinning a pigmented hexamethylene adipamide fiber from a melt blend of a polymer and a colored pigment wherein the polymer is a random interpolyamide or a block polymer having two different difunctional recurring amide-forming moieties other than those which form hexamethylene adipamide is disclosed along with pigmented hexamethylene adipamide polymer fibers having tenacities greater than 7.5 or even 8 grams per denier.
Claims9
A pigmented hexamethylene adipamide polymer fiber having a tenacity of at least 7.5 grams per denier, the fiber being comprised of a polyamide and a colored pigment wherein the polyamide is a random interpolyamide or a block polyamide having at least 80 percent by weight hexamethylene adipamide units and at least two different recurring difunctional amide-forming moieties other than those which form hexamethylene adipamide, each of said different recurring amide-forming moieties being present in an amount of 0.25 to 10 weight percent of the polyamide and wherein the different amide-forming moieties constituting part of a block are selected from the group consisting of isophthalic, terephthalic, dodecanedioic, 2-methyl pentamethylenediamino, and N,N'-dibutylhexamethylenediamino.
Dependencies are inferred from the claim text.