IP Library › Granted Patent US 12,540,424
Granted Patent B2
US 12,540,424 · App. 17/112,724 · Granted Feb 3, 2026

Flame resistant fabrics formed of long staple yarns and filament yarns

Inventors: Charles S. Dunn (Griffin, GA); Michael A. Laton (Fayetteville, GA); Brian John Walsh (Atlanta, GA); Scott Ritenour (Peachtree City, GA)
Assignee: Southern Mills, Inc.
D03D15/513D03D15/283D03D15/292D10B2331/02D10B2401/041
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Quick Facts
Patent No.
US 12,540,424
App. No.
17/112,724
Granted
Feb 3, 2026
Kind
B2
Abstract

Embodiments of the invention relate to flame resistant fabrics formed of a combination of filament and long staple yarns that exhibit excellent physical and thermal properties at relatively light weights.

Claims (32)

1 . A flame resistant fabric comprising:

(a) a plurality of first long staple yarns formed of a first fiber composition comprising a plurality of first long staple fibers having a length of greater than 2 inches up to about 40 inches, the first long staple fibers comprising a first flame resistant material;

(b) a plurality of second long staple yarns formed of a second fiber composition comprising a plurality of second long staple fibers having a length of greater than 2 inches up to about 40 inches, the second long staple fibers comprising a second flame resistant material different from the first flame resistant material, wherein the second fiber composition is different from the first fiber composition; and

(c) a plurality of flame resistant filament yarns, wherein the flame resistant fabric is devoid of short staple fibers having a length of 2 inches or less.

2 . The flame resistant fabric of claim 1 , wherein the first fiber composition further comprises a plurality of third long staple fibers having a length of greater than 2 inches up to about 40 inches and comprising a third flame resistant material.

3 . The flame resistant fabric of claim 2 , wherein the first flame resistant material is polybenzimidazole and the third flame resistant material is aramid.

4 . The flame resistant fabric of claim 2 , wherein the first fiber composition comprises 30-45% of the plurality of third long staple fibers and 55 to 70% of the plurality of first long staple fibers.

5 . The flame resistant fabric of claim 4 , wherein the first flame resistant material is polybenzimidazole and the second flame resistant material is aramid.

6 . The flame resistant fabric of claim 1 , wherein the second fiber composition comprises only the second flame resistant material.

7 . The flame resistant fabric of claim 2 , wherein the second flame resistant material and the third flame resistant material are the same.

8 . The flame resistant fabric of claim 7 , wherein the first flame resistant material comprises polybenzimidazole.

9 . The flame resistant fabric of claim 1 , wherein at least some of the plurality of first long staple yarns or the plurality of second long staple yarns are plied with another yarn.

10 . The flame resistant fabric of claim 1 , wherein at least some of the plurality of flame resistant filament yarns comprise aramid.

11 . The flame resistant fabric of claim 1 , wherein the fabric comprises two to six ends of the first and second long staple yarns, collectively, for every one filament yarn end extending in at least one direction of the fabric.

12 . The flame resistant fabric of claim 1 , wherein the fabric comprises a warp direction and a fill direction and wherein the plurality of first long staple yarns, the plurality of second long staple yarns, and the plurality of flame resistant filament yarns are provided in both the warp and fill directions.

13 . The flame resistant fabric of claim 12 , wherein at least three, but less than eight, ends of the first and second long staple yarns, collectively, are provided between adjacent filament yarn ends in at least one of the warp direction or the fill direction.

14 . The flame resistant fabric of claim 1 , wherein the fabric comprises a weight between 4-7 ounces per square yard, inclusive.

15 . A woven flame resistant fabric having a warp direction and a fill direction, the fabric comprising:

(a) a plurality of first flame resistant long staple yarns comprising long staple fibers having a length of greater than 2 inches up to about 40 inches, the plurality of first flame resistant long staple yarns extending in both the warp and fill directions, wherein the plurality of first flame resistant long staple yarns are formed of a fiber blend comprising a first plurality of the long staple fibers of a first flame resistant material and a second plurality of the long staple fibers of a second flame resistant material different from the first flame resistant material;

(b) a plurality of second flame resistant long staple yarns extending in both the warp and fill directions and comprising only a third flame resistant material, wherein the third flame resistant material is different from at least one of the first flame resistant material or the second flame resistant material; and

(c) a plurality of flame resistant filament yarns interwoven with the plurality of first flame resistant long staple yarns and the plurality of second flame resistant long staple yarns in both the warp and fill directions.

16 . The woven flame resistant fabric of claim 15 , wherein the first flame resistant material and the third flame resistant material are the same.

17 . A woven flame resistant fabric having a warp direction and a fill direction, the fabric comprising:

(a) flame resistant first long staple yarns extending in both the warp and fill directions, wherein each first long staple yarn is formed of a fiber blend comprising a plurality of first long staple fibers having a length of greater than 2 inches up to about 40 inches and of a first flame resistant material and a plurality of second long staple fibers having a length of greater than 2 inches up to about 40 inches and of a second flame resistant material different from the first flame resistant material;

(b) flame resistant second long staple yarns extending in both the warp and fill directions, wherein each second long staple yarn is formed entirely of a third flame resistant material, wherein the third flame resistant material is different from a least one of the first flame resistant material or the second flame resistant material; and

(c) flame resistant filament yarns interwoven with the first and second long staple yarns in both the warp and fill directions, wherein:

each end of the first long staple yarns comprises at least two first long staple yarns plied together;

each end of the second long staple yarns comprises at least two second long staple yarns plied together; and

more than three but less than eight first long staple yarn ends and second long staple yarn ends are collectively provided between adjacent filament yarn ends in at least one of the warp direction or the fill direction.

18 . The woven flame resistant fabric of claim 17 , wherein the third flame resistant material and the first flame resistant material are the same.

19 . The woven flame resistant fabric of claim 18 , wherein the first flame resistant material comprises para-aramid and the second flame resistant material comprises polybenzimidazole.

20 . The woven flame resistant fabric of claim 16 , wherein the first flame resistant material and the third flame resistant material are para-aramid.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 13, 2021
From: DUNN, CHARLES S.; LATON, MICHAEL A.; WALSH, BRIAN JOHN; RITENOUR, SCOTT
To: SOUTHERN MILLS, INC.
Reel/Frame 056834/0607 →
Continuity (2)
Provisional Application 62943968 · Dec 5, 2019
Related Publication 20210172098A1 · Jun 10, 2021
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