# US 2026/0085451 A1 · Method of making polyhydroxyalkanoate yarn and fabric and article comprising the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0085451 A1 - Document ID: US20260085451A1 - Status: Published application - Kind: A1 - Application number: 19/340,127 - Filed: 2025-09-25 - Published: 2026-03-26 - Earliest claimed: 2024-09-25 - Assignees: NEOX Public Benefit LLC - Applicants: NEOX Public Benefit LLC - Inventors: Neri Oxman; Markus A.R. Kayser; Luis Ruben Soenksen Martinez; Jessica Lu; Andrea H. Westlie - Web page: https://patentgrep.com/patent/US20260085451A1 ## CPC - D01D 5/088: Cooling filaments, threads or the like, leaving the spinnerettes - C08G 63/06: derived from hydroxycarboxylic acids - D01F 6/625: {derived from hydroxy-carboxylic acids, e.g. lactones} - D02G 3/02: Yarns or threads characterised by the material or by the materials from which they are made - D03D 15/283: synthetic polymer-based, e.g. polyamide or polyester fibres (cellulose-based artificial fibres D03D15/225) - D03D 15/573: Tensile strength - D04B 1/16: synthetic threads - D04B 21/00: Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes - D10B 2331/04: polyesters, e.g. polyethylene terephthalate [PET] - D10B 2401/063: high strength - D01D: MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS - C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS - D01F: CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS - D02G: CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS - D03D: WOVEN FABRICS; METHODS OF WEAVING; LOOMS - D04B: KNITTING - D10B: INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES ## Abstract A method of making a polyhydroxyalkanoate yarn comprising a polyhydroxyalkanoate fiber is disclosed. The method comprises extruding a polymer melt comprising a polyhydroxyalkanoate composition comprising a polyhydroxyalkanoate through a spinneret, withdrawing a fiber from the spinneret, quenching the fiber, and collecting the fiber on a winding roller. The yarn exhibits an elongation at break of 50% or more to 1000% or less and a tenacity of 0.1 g/d or more to 4 g/d or less. A polyhydroxyalkanoate yarn comprising a polyhydroxyalkanoate fiber is also disclosed. ## Claims ### Claim 1 A method of making a polyhydroxyalkanoate yarn comprising a polyhydroxyalkanoate fiber, the polyhydroxyalkanoate fiber formed by a method comprising: extruding a polymer melt comprising a polyhydroxyalkanoate composition comprising a polyhydroxyalkanoate through a spinneret; withdrawing a fiber from the spinneret; quenching the fiber; and collecting the fiber on a winding roller; wherein the yarn exhibits an elongation at break of 50% or more to 1000% or less and a tenacity of 0.1 g/d or more to 4 g/d or less. ### Claim 2 (depends on 1) The method of claim 1, wherein the polyhydroxyalkanoate comprises a homopolymer. ### Claim 3 (depends on 1) The method of claim 1, wherein the polyhydroxyalkanoate comprises a copolymer. ### Claim 4 (depends on 1) The method of claim 1, wherein the polyhydroxyalkanoate has a monomeric unit of the following formula: —OCR1R2(CR3R4)nCO— wherein n is an integer; and R1, R2, R3, and R4 independently can be a hydrocarbon radical; a halo-and hydroxy-substituted radical; a hydroxy radical; a halogen radical; a nitrogen-substituted radical; an oxygen-substituted radical; or a hydrogen atom. ### Claim 5 (depends on 4) The method of claim 4, wherein n is from 1 to 3. ### Claim 6 (depends on 4) The method of claim 4, wherein R1, R2, R3, and R4 independently can be hydrocarbon radicals or hydrogen atoms. ### Claim 7 (depends on 6) The method of claim 6, wherein the hydrocarbon radical is an alkyl radical. ### Claim 8 (depends on 1) The method of claim 1, wherein the polyhydroxyalkanoate comprises a 3-hydroxybutyrate monomeric unit. ### Claim 9 (depends on 1) The method of claim 1, wherein the polyhydroxyalkanoate comprises poly-3-hydroxybutyrate-co-3-hydroxyhexanoate. ### Claim 10 (depends on 1) The method of claim 1, wherein a plurality of fibers are drawn from the spinneret and the method further comprises a step of converging the plurality of fibers to form the yarn. ### Claim 11 (depends on 1) The method of claim 1, wherein the yarn exhibits an elongation at break of 150% or more to 500% or less. ### Claim 12 (depends on 1) The method of claim 1, wherein the yarn exhibits an elongation at break of 150% or more to 350% or less. ### Claim 13 (depends on 1) The method of claim 1, wherein the yarn exhibits a tenacity of 0.5 g/d or more to 3 g/d or less. ### Claim 14 (depends on 1) The method of claim 1, wherein the yarn exhibits a tenacity of 1 g/d or more to 2 g/d or less. ### Claim 15 (depends on 1) A polyhydroxyalkanoate yarn made according to the method of claim 1. ### Claim 16 (depends on 15) A fabric comprising the polyhydroxyalkanoate yarn of claim 15. ### Claim 17 (depends on 16) The fabric of claim 16, wherein the fabric is a knit fabric. ### Claim 18 (depends on 16) The fabric of claim 16, wherein the fabric is a woven fabric. ### Claim 19 A polyhydroxyalkanoate yarn comprising a polyhydroxyalkanoate fiber comprising a polyhydroxyalkanoate composition comprising a polyhydroxyalkanoate, wherein the yarn exhibits an elongation at break of 50% or more to 1000% or less and a tenacity of 0.1 g/d or more to 4 g/d or less. ### Claim 20 (depends on 19) The polyhydroxyalkanoate yarn of claim 19, wherein the polyhydroxyalkanoate comprises a homopolymer. ### Claim 21 (depends on 19) The polyhydroxyalkanoate yarn of claim 19, wherein the polyhydroxyalkanoate comprises a copolymer. ### Claim 22 (depends on 19) The polyhydroxyalkanoate yarn of claim 19, wherein the polyhydroxyalkanoate has a monomeric unit of the following formula: —OCR1R2(CR3R4)nCO— wherein n is an integer; and R1, R2, R3, and R4 independently can be a hydrocarbon radical; a halo-and hydroxy-substituted radical; a hydroxy radical; a halogen radical; a nitrogen-substituted radical; an oxygen-substituted radical; or a hydrogen atom. ### Claim 23 (depends on 22) The polyhydroxyalkanoate yarn of claim 22, wherein n is from 1 to 3. ### Claim 24 (depends on 22) The polyhydroxyalkanoate yarn of claim 22, wherein R1, R2, R3, and R4 independently can be hydrocarbon radicals or hydrogen atoms. ### Claim 25 (depends on 24) The polyhydroxyalkanoate yarn of claim 24, wherein the hydrocarbon radical is an alkyl radical. ### Claim 26 (depends on 19) The polyhydroxyalkanoate yarn of claim 19, wherein the polyhydroxyalkanoate comprises a 3-hydroxybutyrate monomeric unit. ### Claim 27 (depends on 19) The polyhydroxyalkanoate yarn of claim 19, wherein the polyhydroxyalkanoate comprises poly-3-hydroxybutyrate-co-3-hydroxyhexanoate. ### Claim 28 (depends on 19) The polyhydroxyalkanoate yarn of claim 19, wherein the yarn exhibits an elongation at break of 150% or more to 500% or less. ### Claim 29 (depends on 19) The polyhydroxyalkanoate yarn of claim 19, wherein the yarn exhibits an elongation at break of 150% or more to 350% or less. ### Claim 30 (depends on 19) The polyhydroxyalkanoate yarn of claim 19, wherein the yarn exhibits a tenacity of 0.5 g/d or more to 3 g/d or less. ### Claim 31 (depends on 19) The polyhydroxyalkanoate yarn of claim 19, wherein the yarn exhibits a tenacity of 1 g/d or more to 2 g/d or less.