NOVEL IGNITION RESISTANT COTTON FIBER, ARTICLES MADE FROM IGNITION RESISTANT COTTON FIBERS, AND METHODS OF MANUFACTURE
First Claim
1. An ignition resistant fiber or assembly of fibers comprising a fiber having a cellulosic center and an outer region or surface of a wax wherein the wax comprises 0.4 to 1.0 or greater percentage by weight of fiber.
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Accused Products
Abstract
A bi-regional fiber with a cellulosic core and a wax outer sheath is disclosed. The sheath can comprise high melting temperature wax. The fiber may be produced by processing the natural fiber at temperatures less than 70° C. The fiber can be processed in a standard manner, e.g., Keir process which may include bleach at approximately 100° C.. and the wax subsequently added at a temperature sufficient to disperse the wax over the fibers. The fibers are ignition resistant as measured by industry standard tests, e.g., FAR 25.853(b) or 14 CFR 25.853(b). The wax may comprise less than 1 percent to 25 percent of the fiber by weight. The wax may be natural wax, synthetic or emulsified wax or blends thereof. The bi-regional fibers can be blended with other fibers including BRCF fibers subject of U.S. Pat. No. 5,700,573.
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Citations
34 Claims
- 1. An ignition resistant fiber or assembly of fibers comprising a fiber having a cellulosic center and an outer region or surface of a wax wherein the wax comprises 0.4 to 1.0 or greater percentage by weight of fiber.
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17. Bi-regional cotton fibers comprising a cellulosic center and an outer region of high temperature wax wherein the fibers pass a standard vertical burn tests conducted according to FAR 25.853(b).
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18. Bi-regional cotton fibers comprising a cellulosic center and an outer region of a cotton wax, a natural wax, or a blend of natural and synthetic waxes melting in the range of 58 to 87°
- C. wherein the fiber passes an ignition resistance test comprising;
a minimum of three battings having a dimension of 2.5 cm×
15 cm×
30 cm and comprised of 80% the bi-regional carbonaceous fibers and 20% polyester fibers sprayed with a solution of a hydrolyzed partial condensation of trimethoxy methyl silane wherein the battings are compressed at 25 lb/in2 (1.75 Kg/cm2) at a temperature of 260°
F. (127°
C.) into panels and wherein the coating is comprised of 10% by weight, wherein standard vertical burn tests according to FAR 25.853(b) are conducted, wherein the panels are conditioned by maintaining the panels in a conditioning room maintained at a temperature of 21°
C.±
5°
C. and 50%±
5% relative humidity for 24 hours preceding the test, wherein each panel is supported vertically and exposed to a Bunsen or Turill burner with a nominal I.D. tube adjusted to give a flame of 3.8 cm in height with a minimum flame temperature is 843°
C., wherein the lower edge of the panel is 1.9 cm above the top edge of the burner, wherein the flame is applied to the center line of the lower edge of the specimens for 12 seconds and then removed and wherein the panel self extinguishes and average burn length does not exceed 20 cm, the average after flame does not exceed 15 seconds and there are no flame drippings.
- C. wherein the fiber passes an ignition resistance test comprising;
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19. Bi-regional cotton fibers comprising a cellulosic center and an outer region of a cotton wax, a natural wax, or blend of natural and synthetic waxes melting in the range of below 58°
- C. wherein the fiber passes an ignition resistance test comprising;
a minimum of three battings having a dimension of 2.5 cm×
15 cm×
30 cm and comprised of 80% the bi-regional carbonaceous fibers and 20% polyester fibers sprayed with a solution of a hydrolyzed partial condensation of trimethoxy methyl silane wherein the battings are compressed at 25 lb/in2 (1.75 Kg/cm2) at a temperature of 260°
F. (127°
C.) into panels and wherein the coating is comprised of 10% by weight, wherein standard vertical burn tests according to FAR 25.853(b) are conducted, wherein the panels are conditioned by maintaining the panels in a conditioning room maintained at a temperature of 21°
C. ±
5°
C. and 50%±
5% relative humidity for 24 hours preceding the test, wherein each panel is supported vertically and exposed to a Bunsen or Turill burner with a nominal I.D. tube adjusted to give a flame of 3.8 cm in height with a minimum flame temperature is 843°
C., wherein the lower edge of the panel is 1.9 cm above the top edge of the burner, wherein the flame is applied to the center line of the lower edge of the specimens for 12 seconds and then removed and wherein the panel self extinguishes and average burn length does not exceed 20 cm, the average after flame does not exceed 15 seconds and there are no flame drippings.
- C. wherein the fiber passes an ignition resistance test comprising;
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20. A fabric or fiber assembly comprising bi-regional cotton fibers comprising a cellulosic center and an outer region of a wax wherein the fibers passes Testing Flammability of Clothing Textiles, 16 CFR 1610, comprising fabric specimens of 2 inches by 6 inches are dried and cooled, the specimens are placed at a 45°
- angle impinged with a flame of ⅝
inch length for a second wherein a plain surface fabric burn time is 3.5 seconds or more and a raised surface fabric average burn time is 7 seconds or more.
- angle impinged with a flame of ⅝
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21. An ignition resistant fiber or assembly of fibers comprising a fiber having a cellulosic center and an outer region of a wax wherein the wax comprises 0.4 to 25 percent of the fibers by weight.
- 25. Bi-regional cotton fiber comprising a cellulosic center and an outer region comprising a wax coating wherein the wax comprises 0.4 percent to 1.5 percent by weight of the fiber.
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26. A bi-regional fiber having a cellulosic center and an outer wax coating bleached in a low temperature—
- peroxide/catalyst or low alkalinity hypochlorite process employing an oxidative process to remove impurities.
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27. A process of making an ignition resistant cotton fiber where said fiber is derived from an ECRU or raw cotton fiber by bleaching fiber at less than 70°
- C. with a bleaching solution comprising a peroxide, peroxide catalyst, and a wetting agent.
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28. A process of bleaching cotton fiber comprising a bleach solution of 1 g/l Cl2 at a temperature not exceeding 40°
- C.
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29. A treatment process for raw cotton comprising treating the raw cotton at a temperature below 75°
- C. and a peroxide/catalyst or low alkalinity hypochlorite process.
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31. A process of making an ignition resistant cotton fiber where said fiber is derived from an ECRU or raw cotton fiber by bleaching fiber at less than 70°
- C. with a bleaching solution comprising an OX−
system, where X is a halogen and where the pH is 6.5 to 8.
- C. with a bleaching solution comprising an OX−
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32. A process of making an ignition resistant cotton fiber where said fiber is derived from a standard bleaching process where an outer region comprises a natural, emulsified or blend of wax that is added subsequent to the bleaching process.
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34. A blended fire retardant fiber assembly comprising from 10 to 90% of bi-regional cotton fibers with BRCF fibers wherein the blended fibers comprises fire retardant properties.
Specification