Blended fiber yarns and fabrics including oxidized polymeric fibers
An article comprising a fabric comprising: (a) a blended yarn comprising: (i) from about 10% to about 85% by weight of at least one biregional fiber comprising an oxidized polymer selected from the group consisting of acrylonitrile based homopolymers, acrylonitrile based copolymers, acrylonitrile based terpolymers, and combinations thereof; (ii) at least one companion fiber selected from the group consisting of FR polyester, FR nylon, FR rayon, FR treated cellulose, m-aramid, p-aramid, modacrylic, novoloid, melamine, wool, nylon, regenerated cellulose, polyvinyl chloride, antistatic fiber, poly(p-phenylene benzobisoxazole) (PBO), polybenzimidazole (PBI), polysulphonamide (PSA), and combinations thereof; and (b) optionally including a companion yarn different from said blended yarn; wherein said companion yarn includes p-aramid in an amount less than 20% of the fabric weight; and wherein the fabric has a weight from about 3 oz/yd 2 to about 12 oz/yd 2 .
1. A fabric comprising:
(a) a blended yarn comprising:
(i) from about 35% to about 65% by the blended yarn weight of at least one fiber comprising an oxidized polyacrylonitrile;
(ii) at least one companion fiber comprising p-aramid;
wherein the blended yarn is present in a fill direction in the fabric; and
(b) a companion yarn different from the blended yarn; wherein the companion yarn comprises:
(i) a staple fiber comprising p-aramid; and
(ii) a staple fiber comprising m-aramid;
wherein the companion yarn different from the blended yarn is present in a warp direction in the fabric, and
wherein the fabric has a weight from about 4 oz/yd 2 to about 9 oz/yd 2 and a ratio of the Thermal Protective Performance (TPP) to the weight is higher than 1.
2. The fabric of claim 1 , wherein the ratio of the Thermal Protective Performance to the weight is at least 1.5.
3. The fabric of claim 1 , wherein the ratio of the Thermal Protective Performance to the weight is about 2.
4. The fabric of claim 1 , wherein the Thermal Protective Performance is greater than 8 to about 15.
5. The fabric of claim 1 , wherein the fiber comprising the oxidized polyacrylonitrile is substantially uniformly oxidized throughout the cross-section of the fiber.
6. The fabric of claim 5 , wherein the fiber comprising the oxidized polyacrylonitrile which is substantially uniformly oxidized has a density from about 1.30 g/cm 3 to about 1.44 g/cm 3 .
7. The fabric of claim 1 , wherein the oxidized polyacrylonitrile has a density from about 1.20 g/cm 3 to about 1.50 g/cm 3 .
8. The fabric of claim 1 , wherein the fabric exhibits a ratio of an arc rating according to ASTM F1959 to weight greater than 1.
9. The fabric of claim 1 , wherein the fabric exhibits an arc rating according to ASTM F1959 that is greater than 8.
10. The fabric of claim 9 , wherein the arc rating is greater than 9 and the fabric has a weight from about 6.5 oz/yd 2 to about 7.5 oz/yd 2 .
11. The fabric of claim 1 , wherein the fabric is dyeable.
12. The fabric of claim 1 , wherein the fabric comprises a twill weave.
13. A method of making the fabric of claim 1 , the method comprising:
forming a fabric comprising combining the blended yarn with the companion yarn different from the blended yarn.
14. An article comprising the fabric of claim 1 .
15. A fabric comprising:
(a) a blended yarn comprising:
(i) from about 35% to about 65% by the blended yarn weight of at least one fiber comprising an oxidized polyacrylonitrile;
(ii) at least one companion fiber comprising p-aramid;
wherein the blended yarn is present in a fill direction in the fabric; and
(b) a companion yarn different from the blended yarn; wherein the companion yarn consists of staple fibers comprising:
(i) p-aramid; and
(ii) m-aramid;
wherein the companion yarn different from the blended yarn is present in a warp direction in the fabric,
wherein the fabric has a weight from about 4 oz/yd 2 to about 9 oz/yd 2 and a ratio of the Thermal Protective Performance (TPP) to the weight is higher than 1.
16. The fabric of claim 15 , wherein the fiber comprising the oxidized polyacrylonitrile is substantially uniformly oxidized throughout the cross-section of the fiber.
17. An article comprising the fabric of claim 15 .