Flame resistant spun staple yarns made from blends of fibers derived from sulfonated polyoxadiazole polymers
AssigneeE. I. Du Pont de Nemours and Company
InventorsMichael W. Cobb, Sharlene Renee Williams, Reiyao Zhu
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Abstract
Described is a flame-resistant spun yarn having: about 50 to about 95 parts by weight of a sulfonated polyoxadiazole based staple fiber comprising repeat units of Formula (I) and one or both of Formula (II) and (IIa): wherein M is a cation; and about 5 to about 50 parts by weight of a textile staple fiber having limiting oxygen index of 21 or greater and a tenacity of about 4 grams per denier or greater, based on the total amount of the polymeric fiber and the textile fiber in the yarn.
Claims5
A flame-resistant spun yarn comprising:
- about 50 to about 95 parts by weight of a sulfonated polyoxadiazole based staple fiber comprising repeat units of Formula (I) and one or both of Formula (II) and (IIa):
- wherein M is a cation;
- and about 5 to about 50 parts by weight of either a textile staple fiber having limiting oxygen index of 21 or greater and a tenacity of about 4 grams per denier or greater, based on the total amount of the polymeric fiber and the textile fiber in the yarn, or a high modulus staple fiber having a tensile modulus of 200 grams per denier or greater, based on the total amount of the polymeric fiber and the high modulus fiber in the yarn.
A flame-resistant spun yarn comprising:
- at least about 25 parts to about 80 parts by weight of a sulfonated polyoxadiazole based staple fiber comprising repeat units of Formula (I) and one or both of Formula (II) and (IIa):
- wherein M is a cation;
- and about 20 to about 75 parts by weight of a modacrylic fiber, based on the total amount of the polymeric fiber and the textile fiber in the yarn.
-12. (canceled)
Dependencies are inferred from the claim text.