# US 12,006,601 B1 · Lightweight, flame resistant fabrics protective against arc flash and thermal performance > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,006,601 B1 - Document ID: US12006601B1 - Status: Granted - Kind: B1 - Application number: 17/934,839 - Filed: 2022-09-23 - Granted: 2024-06-11 - Earliest claimed: 2021-09-24 - Assignees: National Safety Apparel, Inc. - Applicants: National Safety Apparel, Inc. - Inventors: Robert W. Hines, Jr.; James Jonathan Bailey; Marty Edward Odum; Toby James Bielenberg - Web page: https://patentgrep.com/patent/US12006601B1 ## CPC - D03D 15/513: heat-resistant or fireproof - D03D 1/0035: {Protective fabrics} - D03D 13/004: {with weave pattern being non-standard or providing special effects} - D03D 13/008: {characterised by weave density or surface weight} - D03D 15/225: artificial, e.g. viscose - D03D 15/283: synthetic polymer-based, e.g. polyamide or polyester fibres (cellulose-based artificial fibres D03D15/225) - D03D 15/47: multicomponent, e.g. blended yarns or threads (multicomponent fibres or filaments D03D15/292) - D03D 15/533: antistatic; electrically conductive - D10B 2321/10: polymers of unsaturated nitriles, e.g. polyacrylonitrile, polyvinylidene cyanide - D10B 2331/021: aromatic polyamides, e.g. aramides - D10B 2401/022: hydrophylic - D10B 2401/04: Heat-responsive characteristics - D10B 2501/04: Outerwear; Protective garments - D03D: WOVEN FABRICS; METHODS OF WEAVING; LOOMS - D10B: INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES ## Abstract A fabric includes flame-resistant Rayon fiber, about 10% by weight to about 20% by weight, based on an effective fabric blend; and oxidized polyacrylonitrile fiber, about 5% by weight to about 15% by weight, based on the effective fabric blend. The fabric includes para-aramid, about 5% by weight to about 15% by weight, based on the effective fabric blend; and nylon fiber, greater than about 0% by weight to about 15% by weight, based on the effective fabric blend. The fabric also includes anti-static fiber, less than 2% by weight, based on the effective fabric blend; and meta-aramid fiber, about 44% by weight to about 80% by weight, based on the effective fabric blend. The fabric has a basis weight of less than about 6.5 oz/yd2 or 220.39 g/m2. ## Claims ### Claim 1 A fabric, comprising: flame-resistant Rayon fiber, about 10% by weight to about 20% by weight, based on an effective fabric blend; oxidized polyacrylonitrile fiber, about 5% by weight to about 15% by weight, based on the effective fabric blend; para-aramid, about 5% by weight to about 15% by weight, based on the effective fabric blend; nylon fiber, greater than about 0% by weight to about 15% by weight, based on the effective fabric blend; anti-static fiber, less than 2% by weight, based on the effective fabric blend; and meta-aramid fiber, about 44% by weight to about 80% by weight, based on the effective fabric blend, wherein the fabric has a basis weight of less than about 6.5 oz/yd2 or 220.39 g/m2. ### Claim 2 (depends on 1) The fabric of claim 1, wherein the fabric has an arc rating of at least 8 cal/cm2. ### Claim 3 (depends on 1) The fabric of claim 1, wherein the fabric is a color other than navy. ### Claim 4 (depends on 1) The fabric of claim 1, wherein the spun yarns comprise: warp yarns in a first direction; a first fill yarns in a second direction; a second fill yarns in the second direction, wherein the first fill yarns and the second fill yarns are in alternating insertion and the first direction is substantially vertical to the second direction. ### Claim 5 (depends on 4) The fabric of claim 4, where the fabric comprises dobby diamond weave. ### Claim 6 (depends on 4) The fabric of claim 4, wherein the warp yarns are about 60-61% by weight based on the total weight of the fabric and the warp yarns comprise: flame resistant rayon, about 12% by weight, based on the total weight of the warp yarns; para-aramid, about 12% by weight, based on the total weight of the warp yarns; nylon fiber, about 9% by weight, based on the total weight of the warp yarns; anti-static fiber, about 1% by weight, based on the total weight of the warp yarns; and meta-aramid fiber, about 66% by weight, based on the total weight of the warp yarns, wherein the first fill yarn are about 19-20 by weight based on the total weight of the fabric and the first fill yarns comprise: flame resistant Rayon, about 12% by weight, based on the total weight of the first fill yarns; para-aramid, about 12% by weight, based on the total weight of the first fill yarns; nylon fiber, about 9% by weight, based on the total weight of the first fill yarns; anti-static fiber, about 1% by weight, based on the total weight of the first fill yarns; and meta-aramid fiber, about 66% by weight, based on the total weight of the first fill yarns, wherein the second fill yarns are about 19-20% by weight based on the total weight of the fabric and the second fill yarns comprise: flame resistant Rayon, about 35% by weight, based on the total weight of the second fill yarns; oxidized polyacrylonitrile fiber, about 45% by weight, based on the total weight of the second fill yarns; para-aramid, about 15% by weight, based on the total weight of the second fill yarns; and nylon fiber, about 5% by weight, based on the total weight of the second fill yarns. ### Claim 7 (depends on 4) The fabric of claim 4, wherein the first fill yarns are navy color. ### Claim 8 (depends on 1) The fabric of claim 1, where in the flame resistant Rayon is hydrophilic. ### Claim 9 (depends on 1) The fabric of claim 1, wherein the fabric is a khaki color.