# US 10,246,800 B2 · Method for manufacturing polyester fabric for airbag > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,246,800 B2 - Document ID: US10246800B2 - Status: Granted - Kind: B2 - Application number: 15/515,648 - Filed: 2015-09-25 - Published: 2017-10-19 - Granted: 2019-04-02 - Earliest claimed: 2014-09-30 - Assignees: Kolon Industries, Inc. - Applicants: Kolon Industries, Inc. - Inventors: Hye-Seung Jin; Sang-Mok Lee; Gi-Woong Kim; Jung-Hoon Youn - Web page: https://patentgrep.com/patent/US10246800B2 ## CPC - D03D 1/02: Inflatable articles - B60R 21/235: characterised by their material - D01F 6/62: from polyesters - D06L 1/14: De-sizing - D06M 15/507: Polyesters - D06N 3/0036: {Polyester fibres (for elastomeric fibres D06N3/0025)} - B60R 2021/23514: {coated fabric} - B60R 2021/23542: {Weaving} - D06M 2101/32: Polyesters - D06M 2200/40: Reduced friction resistance, lubricant properties; Sizing compositions - D06N 2203/066: Silicon polymers - D06N 2209/125: Non-permeable - D06N 2211/268: Airbags - D10B 2331/04: polyesters, e.g. polyethylene terephthalate [PET] - D10B 2505/124: Air bags - D03D: WOVEN FABRICS; METHODS OF WEAVING; LOOMS - B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR - D01F: CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS - D06L: DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS - D06M: TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS - D06N: WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR - D10B: INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES ## Abstract Disclosed is a method for manufacturing a polyester fabric for an airbag that can not only prevent or minimize the separation of a sizing agent, which is provided to a yarn through a sizing process, during a weaving process, but can also maximize a peel strength between a textile substrate and a coating layer to be subsequently formed thereon and lower the stiffness of an airbag fabric by effectively removing the sizing agent from the textile substrate after the weaving process is completed. The method of the present invention comprises: applying a polyester-based sizing agent to a polyester yarn; manufacturing a textile substrate with the sizing agent-applied polyester yarn; removing the sizing agent from the textile substrate under an alkaline condition of pH 8 to 10; and forming a coating layer on the sizing agent-removed textile substrate in order to enhance air-tightness. ## Claims ### Claim 1 A method for manufacturing a polyester fabric for an airbag, the method comprising: applying a polyester-based sizing agent to a polyester yarn; manufacturing a textile substrate with the sizing agent-applied polyester yarn; removing the sizing agent from the textile substrate under an alkaline condition of pH 8 to 10 to give a sizing agent-removed textile substrate; and forming a coating layer on the sizing agent-removed textile substrate in order to enhance air-tightness, wherein the removing the sizing agent comprises having the textile substrate pass through a scouring solution of pH 8 to 10; wherein the scouring solution comprises water; and an alkaline compound, a permeating agent, an insolubilizing agent, and desizing agent, all of which are dissolved in the water; and wherein the amount of the alkaline compound is from about 0.073 wt % to about 0.13 wt % to the total weight of the scouring solution. ### Claim 2 (depends on 1) The method of claim 1, wherein 100 parts by weight of the alkaline compound, 160 to 190 parts by weight of the permeating agent, 190 to 220 parts by weight of the insolubilizing agent, and 450 to 550 parts by weight of the desizing agent are dissolved in the water. ### Claim 3 (depends on 1) The method of claim 1, wherein the removing the sizing agent further comprises having the textile substrate, which has passed through the scouring solution, pass through a washing solution. ### Claim 4 (depends on 3) The method of claim 3, wherein the washing solution consists essentially of water. ### Claim 5 (depends on 3) The method of claim 3, wherein the scouring solution is contained in first and second scouring baths, the washing solution is contained in first, second, and third washing baths, the scouring solution in the first scouring bath is maintained at 50 to 70° C., the scouring solution in the second scouring bath is maintained at 75 to 95° C., the washing solution in the first washing bath is maintained at 70 to 90° C., the washing solution in the second washing bath is maintained at 70 to 90° C., and the washing solution in the third washing bath is maintained at 40 to 60° C. ### Claim 6 (depends on 3) The method of claim 3, wherein the textile substrate passes through the scouring solution and washing solution at a speed of 10 to 21 m/min. ### Claim 7 (depends on 1) The method of claim 1, further comprising, prior to forming the coating layer, the steps of: drying the sizing agent-removed textile substrate; and heat-setting the dried textile substrate. ### Claim 8 (depends on 7) The method of claim 7, wherein the step of heat-setting is carried out at 150 to 190° C.