Article of thermal protective clothing

Patent metadata

Field	Value
Publication number	US-9370212-B2
Application number	US-201113224837-A
Country	US
Kind code	B2
Filing date	Sep 2, 2011
Priority date	Sep 2, 2011
Publication date	Jun 21, 2016
Grant date	Jun 21, 2016

Abstract

This invention relates to an article of thermal protective clothing having fabric woven with a warp-faced or weft-faced twill weave that incorporates a first yarn forming the majority of the outer article surface that includes hydrophilic fiber and a first flame resistant fiber, with at least 25 weight percent of that first yarn being hydrophilic fiber; and a second yarn forming the majority of the inner article surface that includes at least 80 weight percent of a second flame resistant fiber that is hydrophobic. Alternatively, the first yarn forming the majority of the outer article surface can include a hydrophilic first flame resistant fiber.

First claim

What is claimed is:

1. An article of thermal protective clothing comprising woven fabric having a warp yarn dissimilar to a fill yarn, the fabric forming an inner and outer surface of the article; the fabric further having a warp-faced or weft-faced twill weave, wherein either:
a) a majority of the outer surface of the article is a first yarn that is the warp yarn in the fabric and a majority of the inner surface of the article is a second yarn that is the fill yarn in the fabric, or
b) a majority of the outer surface of the article is a first yarn that is a fill yarn in the fabric and a majority of the inner surface of the article is a second yarn that is the warp yarn in the fabric; and
wherein the first yarn forming the majority of the outer surface of the article comprises hydrophilic fiber and a first flame resistant fiber, with at least 25 weight percent of the yarn being hydrophilic fiber; and
wherein the second yarn forming the majority of the inner surface of the article comprises at least 80 weight percent of a second flame resistant fiber that is hydrophobic,
wherein the wetting time on the inner surface is less than 6 seconds and the wetting time for the outer surface is at least 6 seconds or greater.

2. The article of claim 1 wherein the warp-faced twill weave is a 1/2, 2/1, 1/3 or 3/1 twill weave.

3. The article of claim 1 wherein the hydrophilic fiber is cellulosic fiber, wool fiber, or mixtures thereof.

4. The article of claim 3 wherein the cellulosic fiber is rayon fiber, viscose fiber, cotton fiber, lyocell fiber, or mixtures thereof.

5. The article of claim 4 wherein the cellulosic fiber is provided with a flame retardant.

6. The article of claim 1 wherein the first or second flame resistant fiber is modacrylic fiber, aramid fiber, polyarenazole fiber, polysulfone fiber, or mixtures thereof.

7. The article of claim 1 wherein the either one or both of the first or second yarns comprise a blend of modacrylic and cellulosic fiber.

8. The article of claim 1 wherein the either one or both of the first or second yarns comprise a blend of FR rayon and aramid fiber.

9. The article of claim 1 wherein:
i) the first yarn forming the majority of the outer surface comprises 40% lyocell fiber, 50% modacrylic fiber, and 10% para-aramid fiber; and
ii) the second yarn forming the majority of the inner surface comprises 100% meta-aramid fiber.

10. The article of claim 1 wherein:
i) the first yarn forming the majority of the outer surface comprises 50% FR rayon fiber, 30% meta-aramid fiber, and 20% nylon fiber; and
ii) the second yarn forming the majority of the inner surface comprises 100% meta-aramid fiber.

11. An article of thermal protective clothing comprising woven fabric having a warp yarn dissimilar to a fill yarn, the fabric forming an inner and outer surface of the article; the fabric further having a warp-faced or weft-faced twill weave, wherein either:
a) a majority of the outer surface of the article is a first yarn that is the warp yarn in the fabric and a majority of the inner surface of the article is a second yarn that is the fill yarn in the fabric, or
b) a majority of the outer surface of the article is a first yarn that is a fill yarn in the fabric and a majority of the inner surface of the article is a second yarn that is the warp yarn in the fabric; and
wherein the first yarn forming the majority of the outer surface of the article comprises at least 25 percent by weight a hydrophilic first flame resistant fiber; and
wherein the second yarn forming the majority of the inner surface of the article comprises at least 80 weight percent of a second flame resistant fiber that is hydrophobic,
wherein the wetting time on the inner surface is less than 6 seconds and the wetting time for the outer surface is at least 6 seconds or greater.

12. The article of claim 11 , wherein the hydrophilic first flame resistant fiber is polyoxadiazole fiber.

13. The article of claim 11 wherein the first yarn further comprises an abrasion resistant fiber.

14. The article of claim 13 wherein the abrasion resistant fiber is a nylon fiber.

15. A coverall, shirt, or pants article made from a single layer of the warp-faced twill weave fabric, the fabric having a warp yarn dissimilar to a fill yarn, the fabric forming an inner and outer surface of the article; and wherein either:
a) a majority of the outer surface of the article is a first yarn that is the warp yarn in the fabric and a majority of the inner surface of the article is a second yarn that is the fill yarn in the fabric, or
b) a majority of the outer surface of the article is a first yarn that is a fill yarn in the fabric and a majority of the inner surface of the article is a second yarn that is the warp yarn in the fabric; and
wherein the first yarn forming the majority of the outer surface of the article comprises either:
i) hydrophilic fiber and a first flame resistant fiber, with at least 25 weight percent of the yarn being hydrophilic fiber, or
ii) at least 25 percent by weight a hydrophilic first flame resistant fiber; and
wherein the second yarn forming the majority of the inner surface of the article comprises at least 80 weight percent of a second flame resistant fiber that is hydrophobic,
wherein the wetting time on the inner surface is less than 6 seconds and the wetting time for the outer surface is at least 6 seconds or greater.

Assignees

• Zhu Reiyao
• Du Pont

Inventors

• Zhu Reiyao

Classifications

• D10B2331/021

  aromatic polyamides, e.g. aramides · CPC title

• A41D31/0033 Primary

  Human Necessities · mapped topic

• D03D15/00

  Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used · CPC title

• A41D1/06

  Trousers · CPC title

• D03D13/004

  with weave pattern being non-standard or providing special effects · CPC title