# US 10,480,103 B2 · Self-warming insulation > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,480,103 B2 - Document ID: US10480103B2 - Status: Granted - Kind: B2 - Application number: 15/572,086 - Filed: 2016-05-19 - Published: 2018-05-24 - Granted: 2019-11-19 - Earliest claimed: 2015-05-22 - Assignees: Primaloft, Inc. - Applicants: Primaloft, Inc. - Inventors: Jon-Alan Minehardt - Web page: https://patentgrep.com/patent/US10480103B2 ## CPC - D02G 3/02: Yarns or threads characterised by the material or by the materials from which they are made - A41D 31/06: Thermally protective, e.g. insulating - D02G 3/04: Blended or other yarns or threads containing components made from different materials - D04H 1/02: Cotton wool; Wadding - D04H 1/42: characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece - D04H 1/435: Polyesters - D04H 1/43828: {sheath-core} - D04H 1/43835: {Mixed fibres, e.g. at least two chemically different fibres or fibre blends} - D10B 2401/022: hydrophylic - D02G: CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS - A41D: OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES - D04H: MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL (weaving D03; knitting D04B; braiding D04C; net-making D04G; sewing D05B; tufting D05C; finishing non-woven fabrics D06); FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING {; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION}(non-woven fabrics having an intermediate or external layer of a different kind, e.g. of woven fabric, B32B) - D10B: INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES ## Abstract The invention provides an insulation material that includes exothermic fibers, heat capturing fibers capable of retaining heat, and synthetic fibers. The heat capturing fibers having a density of at least 1.17 g/cm3 or 2.0 Dtex linear density. Also provided are articles comprising, and methods of making the inventive insulation material. ## Claims ### Claim 1 An insulation material comprising: exothermic fibers; heat capturing fibers capable of retaining heat, said heat capturing fibers having a density of at least 1.17 g/cm3 or 2.0 Dtex linear density; and synthetic fibers. ### Claim 2 (depends on 1) The insulation material according to claim 1, wherein the exothermic fibers are hygroscopic exothermic fibers. ### Claim 3 (depends on 2) The insulation material according to claim 2, comprising a first layer, a second layer, and a third layer, wherein the first layer comprises the exothermic fibers, the second layer comprises the heat capturing fibers, and the third layer comprises the synthetic fibers. ### Claim 4 (depends on 2) The insulation material according to claim 2, wherein the hygroscopic exothermic fibers have a moisture absorption rate of at least 12%. ### Claim 5 (depends on 4) The insulation material according to claim 4, comprising a first layer, a second layer, and a third layer, wherein the first layer comprises the exothermic fibers, the second layer comprises the heat capturing fibers, and the third layer comprises the synthetic fibers. ### Claim 6 (depends on 2) The insulation material according to claim 2, wherein the hygroscopic exothermic fibers are selected from the group consisting of sheep wool, acrylate-based hygroscopic and exothermic fibers, and fibers containing activated carbon. ### Claim 7 (depends on 1) The insulation material according to claim 1, wherein the exothermic fibers are selected from the group consisting of sheep wool, acrylate-based hygroscopic and exothermic fibers, fibers containing activated carbon, and heat-generative acrylic fibers. ### Claim 8 (depends on 7) The insulation material according to claim 7, comprising a first layer, a second layer, and a third layer, wherein the first layer comprises the exothermic fibers, the second layer comprises the heat capturing fibers, and the third layer comprises the synthetic fibers. ### Claim 9 (depends on 1) The insulation material according to claim 1, wherein the heat capturing fibers are selected from fibers containing ceramic, fibers containing carbon, and fibers containing phase change material. ### Claim 10 (depends on 1) The insulation material according to claim 1, wherein the exothermic fibers, heat capturing fibers, and synthetic fibers are present in a homogenous mixture. ### Claim 11 (depends on 1) The insulation material according to claim 1, comprising a first layer and a second layer, wherein the first layer comprises the exothermic fibers and the heat capturing fibers, and the second layer comprises the synthetic fibers. ### Claim 12 (depends on 1) The insulation material according to claim 1, comprising a first layer and a second layer, wherein the first layer comprises the exothermic fibers and the synthetic fibers, and the second layer comprises the heat capturing fibers. ### Claim 13 (depends on 1) The insulation material according to claim 1, comprising a first layer, a second layer, and a third layer, wherein the first layer comprises the exothermic fibers, the second layer comprises the heat capturing fibers, and the third layer comprises the synthetic fibers. ### Claim 14 (depends on 1) The insulation material according to claim 1, wherein the insulation material is in the form of batting. ### Claim 15 (depends on 1) The insulation material according to claim 1, wherein the insulation material is in the form of blowable clusters. ### Claim 16 (depends on 1) The insulation material according to claim 1, wherein the insulation material is in the form of yarn. ### Claim 17 (depends on 1) The insulation material according to claim 1, wherein the synthetic fibers are polyester fibers. ### Claim 18 (depends on 1) The insulation material according to claim 1, wherein the heat capturing fibers capable of retaining heat include less than 50 mL air per 1 gram of fiber. ### Claim 19 (depends on 1) An article comprising the insulation material according to claim 1. ### Claim 20 (depends on 19) The article according to claim 19, wherein the article is selected from footwear, clothing, bedding, and a sleeping bag.