Flame-retardant fabric and work clothing using the same

Patent metadata

Field	Value
Publication number	US-12378700-B2
Application number	US-202318517287-A
Country	US
Kind code	B2
Filing date	Nov 22, 2023
Priority date	Jun 4, 2021
Publication date	Aug 5, 2025
Grant date	Aug 5, 2025

Abstract

The present disclosure relates to a flame-retardant fabric that includes a modacrylic fiber and a cellulose fiber. The cellulose fiber is one or more selected from a regenerated cellulose fiber and a natural cellulose fiber. The flame-retardant fabric contains the modacrylic fiber in an amount of 65 to 90 wt % and the cellulose fiber in an amount of 10 to 35 wt % with respect to the overall weight of the fabric. The modacrylic fiber contains a magnesium compound inside the fiber. The flame-retardant fabric contains the magnesium compound in an amount of 2.5 to 4.5 wt %. Afterflame time and afterglow time of the flame-retardant fabric measured using a flammability test based on ISO 15025: 2000 are 2 seconds or less and 2 seconds or less, respectively.

First claim

The invention claimed is:

1. A flame-retardant fabric comprising:
a modacrylic fiber; and
a cellulose fiber,
wherein:
the cellulose fiber is one or more selected from the group consisting of a regenerated cellulose fiber and a natural cellulose fiber,
the flame-retardant fabric comprises the modacrylic fiber in an amount of 80 to 90 wt % and the cellulose fiber in an amount of 10 to 15 wt % with respect to the overall weight of the fabric,
the modacrylic fiber comprises magnesium hydroxide inside the fiber,
the flame-retardant fabric comprises magnesium hydroxide in an amount of 2.5 to 4.5 wt % with respect to the overall weight of the fabric, and
afterflame time and afterglow time of the flame-retardant fabric measured using a flammability test based on ISO 15025:2000 are 2 seconds or less and 2 seconds or less, respectively.

2. The flame-retardant fabric according to claim 1 ,
wherein the modacrylic fiber comprises an acrylonitrile copolymer that comprises acrylonitrile in an amount of 30 to 85 wt %, one or more halogen-containing monomers selected from the group consisting of a halogen-containing vinyl monomer and a halogen-containing vinylidene monomer in an amount of 15 to 65 wt %, and a vinyl monomer having a sulfonic group in an amount of 0 to 3 wt %.

3. The flame-retardant fabric according to claim 1 , wherein the modacrylic fiber comprises magnesium hydroxide inside the fiber in an amount of 2.8 to 6.7 wt %.

4. The flame-retardant fabric according to claim 1 , wherein the regenerated cellulose fiber is one or more selected from the group consisting of a rayon fiber, a flame-retardant rayon fiber, a lyocell fiber, and a flame-retardant lyocell fiber.

5. The flame-retardant fabric according to claim 1 , wherein the flame-retardant fabric comprises the modacrylic fiber in an amount of 80 to 90 wt % and the regenerated cellulose fiber in an amount of 10 to 15 wt % with respect to the overall weight of the fabric.

6. The flame-retardant fabric according to claim 1 , wherein the flame-retardant fabric comprises the modacrylic fiber in an amount of 80 to 90 wt %, the regenerated cellulose fiber in an amount of 10 to 15 wt %, and another fiber in an amount of 0 to 10 wt % with respect to the overall weight of the fabric.

7. The flame-retardant fabric according to claim 5 , wherein the regenerated cellulose fiber is one or more selected from the group consisting of a lyocell fiber and a flame-retardant lyocell fiber.

8. The flame-retardant fabric according to claim 1 , wherein the flame-retardant fabric comprises the modacrylic fiber in an amount of 80 to 90 wt %, and the natural cellulose fiber in an amount of 10 to 15 wt %, with respect to the overall weight of the fabric.

9. The flame-retardant fabric according to claim 1 , wherein the flame-retardant fabric comprises the modacrylic fiber in an amount of 80 to 90 wt %, the natural cellulose fiber in an amount of 10 to 15 wt %, and another fiber in an amount of 0 to 10 wt % with respect to the overall weight of the fabric.

10. The flame-retardant fabric according to claim 6 , wherein the other fiber is one or more selected from the group consisting of a metallic fiber, a metal-plated fiber, a copper compound-coated fiber, a conductive material-containing fiber, a meta-aramid fiber, a polyoxadiazole fiber, a polyimide fiber, a polyamideimide fiber, a nylon fiber, a polyester fiber, a para-aramid fiber, and a polyarylate fiber.

11. The flame-retardant fabric according to claim 1 , wherein the flame-retardant fabric comprises the modacrylic fiber, the regenerated cellulose fiber, and the natural cellulose fiber, and a weight ratio between the regenerated cellulose fiber and the natural cellulose fiber is 1:2 to 3:1.

12. The flame-retardant fabric according to claim 1 , wherein the modacrylic fiber is a solution-dyed fiber.

13. The flame-retardant fabric according to claim 1 , which is a knitted fabric.

14. A work clothing comprising the flame-retardant fabric according to claim 1 .

15. The work clothing according to claim 14 , wherein the modacrylic fiber comprises magnesium hydroxide inside the fiber in an amount of 2.8 to 6.7 wt %.

16. The work clothing according to claim 14 , wherein the flame-retardant fabric comprises the modacrylic fiber in an amount of 80 to 90 wt %, and the natural cellulose fiber in an amount of 10 to 15 wt %, with respect to the overall weight of the fabric.

17. The work clothing according to claim 14 , wherein the flame-retardant fabric comprises the modacrylic fiber in an amount of 80 to 90 wt %, the natural cellulose fiber in an amount of 10 to 15 wt %, and another fiber in an amount of 0 to 10 wt % with respect to the overall weight of the fabric.

Assignees

• Kaneka Corp

Inventors

• Sato Motohiro
• Ozaki Akira
• Mio Wataru

Classifications

• D10B2501/04

  Outerwear; Protective garments · CPC title

• D10B2401/04

  Heat-responsive characteristics · CPC title

• D10B2321/101

  modacrylic · CPC title

• D10B2201/22

  made from cellulose solutions · CPC title

• D10B2201/01

  Natural vegetable fibres · CPC title