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US 2009/0053952 A1Published application
Spun staple yarns made from blends of rigid-rod fibers and fibers derived from diamino diphenyl sulfone and fabrics and garments made therefrom and methods for making same
AssigneeE.I. du Pont de Nemours and Company
InventorsReiyao Zhu, Vlodek Gabara
Life of this patent
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Abstract
This invention relates to a flame-resistant spun staple yarns and fabrics and garments comprising these yarns and methods of making the same. The yarns have 20 to 50 parts by weight of a polymeric staple fiber containing a structure derived from a monomer selected from the group consisting of 4,4′diaminodiphenyl sulfone, 3,3′diaminodiphenyl sulfone, and mixtures thereof; and 50 to 80 parts by weight of a rigid-rod staple fiber, based on 100 parts by weight of the polymeric fiber and the rigid-rod fiber in the yarn.
Claims20
A spun yarn comprising:
- to 50 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
- to 80 parts by weight of a rigid-rod staple fiber;
- based on 100 parts by weight of the polymeric fiber and the rigid-rod staple fiber in the yarn.
1 more element
A method of producing a spun yarn comprising:
- a) forming a fiber mixture of 20 to 50 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 50 to 80 parts by weight of a rigid-rod staple fiber, based on 100 parts by weight of the polymeric fiber and the rigid-rod fiber in the yarn;
- and
- b) spinning the fiber mixture into a spun staple yarn.
1 more element
Dependencies are inferred from the claim text.