Flame-retardant fabric, method for producing same and fireprotective clothes comprising same

Patent metadata

Field	Value
Publication number	US-2016201236-A1
Application number	US-201414913520-A
Country	US
Kind code	A1
Filing date	Aug 22, 2014
Priority date	Aug 23, 2013
Publication date	Jul 14, 2016
Grant date	—

Abstract

A flame-retardant fabric may include a cellulosic fiber and a modacrylic fiber, the cellulosic fiber being a natural cellulose fiber containing a phosphorus compound, the modacrylic fiber containing an antimony compound, the flame-retardant fabric including the modacrylic fiber containing the antimony compound in an amount of 14 to 54 wt %, antimony in an amount of not less than 1.7 wt %, and phosphorus in an amount of 0.3 to 1.5 wt % with respect to the total weight of the flame-retardant fabric, and the flame-retardant fabric having a weight per unit area of not less than 160 g/m 2 . The flame-retardant fabric can be produced by subjecting a fabric including a natural cellulose fiber and a modacrylic fiber containing an antimony compound to flame-retardant treatment with a phosphorus compound.

First claim

1 . A flame-retardant fabric comprising:
a cellulosic fiber; and a modacrylic fiber, wherein the cellulosic fiber is a natural cellulose fiber comprising a phosphorus compound, the modacrylic fiber comprises an antimony compound, the flame-retardant fabric comprises the antimony-containing modacrylic fiber in an amount of 14 to 54 wt %, antimony in an amount of not less than 1.7 wt %, and phosphorus in an amount of 0.3 to 1.5 wt % with respect to a total weight of the flame-retardant fabric, and the flame-retardant fabric has a weight per unit area of not less than 160 g/m 2 .

2 . The flame-retardant fabric according to claim 1 , wherein the flame-retardant fabric has a tear strength of not less than 1.5 kgf, the tear strength being measured through a tear strength test based on ASTM D1424 pendulum method.

3 . The flame-retardant fabric according to claim 1 , wherein the flame-retardant fabric comprises the antimony-containing modacrylic fiber in an amount of 18 to 45 wt % with respect to the total weight of the flame-retardant fabric.

4 . The flame-retardant fabric according to claim 3 , wherein the flame-retardant fabric comprises the antimony-containing modacrylic fiber in an amount of 22 to 35 wt % with respect to the total weight of the flame-retardant fabric.

5 . The flame-retardant fabric according to claim 1 , wherein in the natural cellulose fiber containing the phosphorus compound, the phosphorus compound is bound to a cellulose molecule or forms an insoluble polymer in the fiber.

6 . The flame-retardant fabric according to claim 1 , wherein the antimony-containing modacrylic fiber comprises the antimony compound in an amount of 1.6 to 33 wt % with respect to a total weight of the fiber.

7 . The flame-retardant fabric according to claim 1 , wherein the antimony compound is one or more compounds selected from the group consisting of antimony trioxide, antimony tetraoxide, and antimony pentoxide.

8 . The flame-retardant fabric according to claim 1 , wherein the flame-retardant fabric has a char length of not more than 4 inches, the char length being measured through a flame retardancy test based on ASTM D6413-08.

9 . The flame-retardant fabric according to claim 1 , wherein the flame-retardant fabric comprises phosphorus in an amount of 0.3 to 1.1 wt % with respect to the total weight of the flame-retardant fabric.

10 . The flame-retardant fabric according to claim 1 , wherein the flame-retardant fabric has a weight per unit area of 160 to 280 g/m 2 .

11 . A method for producing a flame-retardant fabric comprising: a cellulosic fiber; and a modacrylic fiber, wherein the cellulosic fiber is a natural cellulose fiber comprising a phosphorus compound, the modacrylic fiber comprises an antimony compound, the flame-retardant fabric comprises the antimony-containing modacrylic fiber in an amount of 14 to 54 wt %, antimony in an amount of not less than 1.7 wt %, and phosphorus in an amount of 0.3 to 1.5 wt % with respect to a total weight of the flame-retardant fabric, and the flame-retardant fabric has a weight per unit area of not less than 160 g/m 2 , and the method comprising:
subjecting a fabric comprising a natural cellulose fiber and a modacrylic fiber comprising an antimony compound to flame-retardant treatment with a phosphorus compound.

12 . The method for producing a flame-retardant fabric according to claim 11 , wherein the flame-retardant treatment is performed by Pyrovatex treatment or ammonia curing using a tetrakis hydroxyalkyl phosphonium salt.

13 . The method for producing a flame-retardant fabric according to claim 11 , wherein the phosphorus compound is an N-methylol phosphonate compound or a tetrakis hydroxyalkyl phosphonium salt.

14 . Fire-protective clothing comprising the flame-retardant fabric according to claim 1 .

15 . The Fire-protective clothing according to claim 14 , wherein the flame-retardant fabric has a tear strength of not less than 1.5 kgf, the tear strength being measured through a tear strength test based on ASTM D1424 pendulum method.

16 . The Fire-protective clothing according to claim 14 , wherein the flame-retardant fabric comprises the antimony-containing modacrylic fiber in an amount of 18 to 45 wt % with respect to the total weight of the flame-retardant fabric.

17 . The Fire-protective clothing according to claim 14 , wherein the natural cellulose fiber containing the phosphorus compound, the phosphorus compound is bound to a cellulose molecule or forms an insoluble polymer in the fiber.

18 . The Fire-protective clothing according to claim 14 , wherein the flame-retardant fabric has a char length of not more than 4 inches, the char length being measured through a flame retardancy test based on ASTM D6413-08.

19 . The Fire-protective clothing according to claim 14 , wherein the flame-retardant fabric comprises phosphorus in an amount of 0.3 to 1.1 wt % with respect to the total weight of the flame-retardant fabric.

20 . The Fire-protective clothing according to claim 14 , wherein the flame-retardant fabric has a weight per unit area of 160 to 280 g/m 2 .

Assignees

• Kaneka Corp

Inventors

• Matsumoto Yoshitomo
• OHZEKI Tatsuro
• Shibuya Fukashi
• Kusunoki Kazuya

Classifications

• D06M2101/06

  cellulosic · CPC title

• A41D31/08

  Heat resistant; Fire retardant · CPC title

• D06M13/447

  Phosphonates or phosphinates containing nitrogen atoms · CPC title

• D06M2101/26

  Polymers or copolymers of unsaturated carboxylic acids or derivatives thereof · CPC title

• D04B1/24 Primary

  wearing apparel · CPC title