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

Patent metadata

Field	Value
Publication number	US-10450679-B2
Application number	US-201414913520-A
Country	US
Kind code	B2
Filing date	Aug 22, 2014
Priority date	Aug 23, 2013
Publication date	Oct 22, 2019
Grant date	Oct 22, 2019

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/m2. 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

The invention claimed is:

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, and the phosphorus compound is bound to a cellulose molecule or forms an insoluble polymer in the fiber,
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 180 to 250 g/m 2 , and has an afterflame time and an afterglow time of 0 seconds with a flame resistance test based on ASTM D6413.08.

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 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.

6. 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.

7. 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.

8. 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.

9. 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 180 to 250 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, wherein the flame-retardant treatment is performed by Pyrovatex treatment or ammonia curing using a tetrakis hydroxyalkyl phosphonium salt,
wherein the flame retardant fabric has an afterflame time and an afterglow time of 0 seconds with a flame resistance test based on ASTM D6413.08.

10. The method for producing a flame-retardant fabric according to claim 9 , wherein the phosphorus compound is an N-methylol phosphonate compound or a tetrakis hydroxyalkyl phosphonium salt.

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

12. The Fire-protective clothing according to claim 11 , 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.

13. The Fire-protective clothing according to claim 11 , 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.

14. The Fire-protective clothing according to claim 11 , 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.

15. The Fire-protective clothing according to claim 11 , 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.

16. The Fire-protective clothing according to claim 11 , 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.

Assignees

• Kaneka Corp

Inventors

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

Classifications

• D01F1/07

  for making fire- or flame-proof filaments · CPC title

• D04B1/24 Primary

  wearing apparel · 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

• D01F6/18

  from polymers of unsaturated nitriles, e.g. polyacrylonitrile, polyvinylidene cyanide · CPC title