| US 7,537,831 B2 | ||
| Flame resistant spun staple yarns made from blends of fibers derived from diamino diphenyl sulfone and modacrylic fibers and fabrics and garments made therefrom and methods for making same | ||
| Reiyao Zhu, Moseley, Va. (US); Debbie Guckert, Chester, Va. (US); and Vlodek Gabara, Richmond, Va. (US) | ||
| Assigned to E.I. du Pont de Nemours and Company, Wilmington, Del. (US) | ||
| Filed on Aug. 22, 2007, as Appl. No. 11/894,953. | ||
| Prior Publication US 2009/0053957 A1, Feb. 26, 2009 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. D02G 3/00 (2006.01); B27N 9/00 (2006.01) | ||
| U.S. Cl. 428—364 [428/365; 428/136; 428/920; 428/921] | 18 Claims |
| 1. A flame-resistant spun yarn consisting of:
a) 25 to 80 parts by weight of a polymeric staple fiber containing a polymer or copolymer derived from a monomer selected
from the group consisting of 4,4′diaminodiphenyl sulfone, 3,3′diaminodiphenyl sulfone, and mixtures thereof; and
b) 20 to 75 parts by weight of a modacrylic fiber; based on 100 parts by weight of the polymeric fiber and the modacrylic fiber in the yarn.
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