| US 7,537,830 B2 | ||
| Flame resistant spun staple yarns made from blends of fibers derived from diamino diphenyl sulfone, low thermal shrinkage fibers, flame resistant fibers, and antistatic fibers and fabrics and garments made therefrom and methods for making same | ||
| Reiyao Zhu, Midlothian, 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. 11/894,944. | ||
| Prior Publication US 2009/0053956 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] | 12 Claims |
| 1. A flame-resistant spun yarn consisting of:
at least 25 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;
2 to 15 parts by weight of a fiber having low thermal shrinkage;
1 to 5 parts by weight of an antistatic fiber; and
the remainder being flame resistant fibers having a limiting oxygen index of 21 or greater;
based on 100 total parts by weight of the polymeric fiber, the low thermal shrinkage fiber, the antistatic fiber, and the
flame resistant fibers in the yarn.
|