EP2503038A1 - Stoff für einen Airbag und Herstellungsverfahren für den Stoff - Google Patents

Stoff für einen Airbag und Herstellungsverfahren für den Stoff Download PDF

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Publication number
EP2503038A1
EP2503038A1 EP11169951A EP11169951A EP2503038A1 EP 2503038 A1 EP2503038 A1 EP 2503038A1 EP 11169951 A EP11169951 A EP 11169951A EP 11169951 A EP11169951 A EP 11169951A EP 2503038 A1 EP2503038 A1 EP 2503038A1
Authority
EP
European Patent Office
Prior art keywords
filaments
warp
fabric
yarns
yarn
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP11169951A
Other languages
English (en)
French (fr)
Other versions
EP2503038B1 (de
Inventor
Hugh Finn
Ralf Koehnen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Autoliv Development AB
Original Assignee
Autoliv Development AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Autoliv Development AB filed Critical Autoliv Development AB
Priority to EP11169951.8A priority Critical patent/EP2503038B1/de
Publication of EP2503038A1 publication Critical patent/EP2503038A1/de
Application granted granted Critical
Publication of EP2503038B1 publication Critical patent/EP2503038B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D1/00—Woven fabrics designed to make specified articles
    • D03D1/02—Inflatable articles
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/50—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads
    • D03D15/58—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads characterised by the coefficients of friction
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M10/00—Physical treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, e.g. by ultrasonic waves, corona discharge, irradiation, electric currents or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M23/00—Treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, characterised by the process
    • D06M23/08—Processes in which the treating agent is applied in powder or granular form

Definitions

  • THIS INVENTION relates to a method for manufacturing an air-bag, and in particular concerns a method for weaving a fabric for use in the production of air-bags.
  • vehicle air-bags are generally formed from woven nylon fabric.
  • the fabric is typically manufactured by drawing a number of parallel warp yarns from a reel, and weaving weft yarns across the warp yarns, generally at right angles thereto.
  • a first weft yarn will be woven into the warp yarn so that it passes over and under alternate warp yarns.
  • the next weft yarn will be introduced so that it passes over the warp yarns that the first weft yarn passed under, and vice versa.
  • the warp yarns are subject to friction and abrasion as they pass through the loom, through coming into contact with neighbouring yarns and against components of the loom. It is therefore necessary to protect the warp yarns from damage during the weaving process.
  • each warp yarn from a relatively large number of filaments (for example, around 140 filaments). These filaments are extruded and gathered together to form the yarn, and the yarn is nipped at periodic intervals to form points of entanglement. These periodic entanglement points may be provided at a spacing of around 20 to 30 per metre of yarn.
  • the warp yarns then have coating applied to protect them during the weaving process.
  • This coating is known as the "size”, and is applied by passing the yarn through a size bath.
  • the size may form around 0.5 to 2% by weight of the finished yarn.
  • the size is removed from the fabric during a scouring process, in which chemicals are applied to the fabric to dissolve the size and wash the size away.
  • one aspect of the present invention provides a fabric formed from interwoven warp and weft yarns which are arranged to be substantially perpendicular to one another, wherein the warp yarns are formed from multiple filaments which are twisted together to form the warp yarns, with a degree of twist greater than about 40 turns per metre.
  • the weft yarns are substantially untwisted.
  • the degree of twist of the weft yarns is less than about 5 turns per metre.
  • every successive warp yarn is formed from filaments that are twisted together.
  • the degree of twist of the filaments forming the warp yarns is less than about 200 turns per metre.
  • the warp yarns have periodic entanglement points, at which the filaments forming the yarn are entangled together.
  • Another aspect of the present invention provides a method of forming warp yarns for use in manufacturing a fabric for an air-bag, including the steps of: providing a bundle of filaments; gathering the bundle of filaments together; and twisting the filaments together, by a degree of twist greater than around 40 turns per metre, to form the yarn.
  • the method further comprises the step of applying periodic entanglement points to the bundle of filaments, prior to the twisting step, the filaments being entangled with one another at the entanglement points.
  • a further aspect of the present invention provides a method of weaving a fabric, comprising the steps of: providing a plurality of warp yarns, each comprising a bundle of filaments that are twisted together with a degree of twist of about 40 turns per metre; providing a plurality of weft yarns; and weaving the warp and weft yarns together to form a fabric, so that the warp and weft yarns are arranged to be substantially perpendicular to one another.
  • the weft yarns are formed from filaments which are substantially not twisted together
  • the warp and weft yarns are of around 400 to 600 decitex.
  • Another aspect of the present invention provides an airbag formed from a fabric according to any one of claims 1 to 7.
  • a further aspect of the present invention provides an air-bag module comprising an air-bag according to claim 13.
  • Another aspect of the present invention provides a vehicle comprising an airbag module according to claim 14.
  • a yarn 1 which is suitable for use as a warp yarn in embodiments of the present invention.
  • the yarn 1 is formed from a number of individual filaments 2 which are twisted together to form the yarn 1.
  • Either "S" or "Z"-twists i.e. right-or left-handed twists) may be used to form the yarn 1.
  • the yarn 1 consists of a bundle of around 96 to 120 filaments 2.
  • the number of filaments 2 in the yarn 1 may be as high as 180 or even higher, however.
  • the degree of twist of the yarns 2 is between around 40 and 200 turns per metre of the yarn 1. If the degree of twist is less than around 40 turns per metre, it has been found that there is generally insufficient consolidation of the filaments 2 that make up the yarn 1.
  • the degree of twist is greater than around 200 turns per metre, it has been found that the resulting yarn becomes too heavy, stiff and unwieldy to be woven effectively into a fabric. In addition the high level of twist will reduce the throughput of the twisting machine, thus increasing the cost.
  • the filaments 2 forming the yarn are extruded in the normal (or any suitable) manner, and are nipped at periodic intervals to form entanglement points.
  • the bundle of filaments is then sent to a twisting machine, which twists the filaments together to form the yarn 1.
  • the yarn 1 may be passed through a size bath so that a suitable finish or lubricant can be applied to the yarn 1.
  • the finished yarn 1 is then wound on to a bobbin, which can then be used to transport the yarn 1 to its destination.
  • the yarn 1 is then used as warp yarns in a weaving process to form a fabric, as discussed above.
  • Figure 2 shows a close-up view of a region of woven fabric 3 embodying the present invention.
  • Figure 2 is a schematic figure and the size and spacing of the yarns forming the fabric 3 is exaggerated for the purpose of clarity.
  • the fabric 3 is formed from a series of warp yarns 4, which run vertically in figure 2 , and weft yarns 5, which run horizontally in figure 2 .
  • each warp yarn 4 passes alternately over and under each alternate weft yarn 5 that is encountered along the length of the warp yarn 4.
  • each weft yarn 5 passes alternately over and under each warp yarn 4 that is encountered along the length of the weft yarn 5.
  • Each warp yarn 4 is formed from a bundle of twisted filaments, as shown in figure 1 .
  • Each weft yarn 5 is substantially untwisted, comprising a bundle of filaments which are generally parallel to one another, and have a degree of twist which is less than about 5 turns per metre.
  • Fabrics embodying the present invention will have warp yarns that are more robust, in which the filaments forming the warp yarns hold together more readily, and are more resistant to damage through friction and abrasion during the weaving process. This means that a reduced amount of size, or no size, may be applied to the warp yarns prior to the weaving process beginning, thus reducing the cost of the finished fabric, both in the amount of size that has to be added to the warp yarns prior to weaving and also in the degree of scouring that needs to be performed to remove the size from the fabric after weaving has been completed.
  • Polyester is stiffer than nylon, and periodic entanglements cannot be applied to polyester as effectively. Periodic entanglements can generally only be applied to polyester yarns with a frequency of around 9 to 20 entanglements per metre. Also, because the filaments forming the yarn are stiffer, the entanglement points do not bind the filaments together as reliably.
  • the size that is used for coating nylon yarns can generally not be applied directly to polyester yarns.
  • the size required to coat polyester yarns is more expensive, and present scouring machines are not configured to remove this size effectively. It is therefore desirable to use as little size as possible, or no size, and as discussed above a reduction in the required amount of size can be achieved by forming the warp yarns from twisted filaments.
  • the weft yarns are substantially untwisted. This is because the weft yarns are, in general, not subject to friction and/or abrasion to the same degree as warp yarns during the weaving process, and are not as prone to breakage of filaments. The twisting stage, which inevitably increases the cost of yarn, need therefore not be applied to the weft yarns.
  • weft yarns do not have any size applied thereto.
  • the weft yarns may have a relatively small amount of finish or lubricant, for instance around 0.5% of "spin finish" from the manufacturing stage.
  • one or both of the warp and weft yarns are formed to have a density of around 400 to 600 decitex.
  • the decitex may be considerably higher, for instance up to around 1800 decitex, or may be lower, for instance around 167 decitex.
  • Embodiments of the invention provide air-bag modules including air-bags formed entirely or partially from fabrics as described above.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Woven Fabrics (AREA)
  • Air Bags (AREA)
EP11169951.8A 2011-03-23 2011-06-15 Stoff für einen Airbag und Herstellungsverfahren für den Stoff Active EP2503038B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11169951.8A EP2503038B1 (de) 2011-03-23 2011-06-15 Stoff für einen Airbag und Herstellungsverfahren für den Stoff

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP11159477.6A EP2503037B1 (de) 2011-03-23 2011-03-23 Stoff zur Verwendung bei der Herstellung eines aufblasbaren Airbags
EP11169951.8A EP2503038B1 (de) 2011-03-23 2011-06-15 Stoff für einen Airbag und Herstellungsverfahren für den Stoff

Publications (2)

Publication Number Publication Date
EP2503038A1 true EP2503038A1 (de) 2012-09-26
EP2503038B1 EP2503038B1 (de) 2022-10-26

Family

ID=44080210

Family Applications (2)

Application Number Title Priority Date Filing Date
EP11159477.6A Active EP2503037B1 (de) 2011-03-23 2011-03-23 Stoff zur Verwendung bei der Herstellung eines aufblasbaren Airbags
EP11169951.8A Active EP2503038B1 (de) 2011-03-23 2011-06-15 Stoff für einen Airbag und Herstellungsverfahren für den Stoff

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP11159477.6A Active EP2503037B1 (de) 2011-03-23 2011-03-23 Stoff zur Verwendung bei der Herstellung eines aufblasbaren Airbags

Country Status (1)

Country Link
EP (2) EP2503037B1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0095537A1 (de) * 1982-06-02 1983-12-07 Teijin Limited Stark gedrehtes Polyester-Multifilamentgarn, und daraus hergestellter Stoff
EP0442373A1 (de) * 1990-02-12 1991-08-21 Hoechst Aktiengesellschaft Gewebe für Airbags
US5236775A (en) * 1990-02-12 1993-08-17 Hoechst Aktiengesellschaft Fabric for airbag

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2245641A (en) * 1938-11-09 1941-06-17 Celanese Corp Composite yarn and fabric made of or containing such yarn
US3761346A (en) * 1969-12-29 1973-09-25 Owens Corning Fiberglass Corp Composite linear material and process of making such material
JPS6228435A (ja) * 1985-07-23 1987-02-06 中興化成工業株式会社 吸音材
DE58904745D1 (de) * 1989-06-30 1993-07-22 Elastic Berger Gmbh & Co Gurtband fuer sicherheitsgurte.
JP3085811B2 (ja) * 1992-06-02 2000-09-11 鐘紡株式会社 低通気性織物及びその製造方法
US6790796B2 (en) * 2001-10-05 2004-09-14 Albany International Corp. Nonwovens forming or conveying fabrics with enhanced surface roughness and texture
AU2003298642A1 (en) * 2002-12-09 2004-06-30 Milliken And Company Treatment of filament yarns to provide spun-like characteristics and yarns and fabrics produced thereby
US20050186873A1 (en) * 2004-02-24 2005-08-25 Milliken & Company Treated textile substrate and method for making a textile substrate
EP2500454B1 (de) * 2011-03-16 2015-05-13 Autoliv Development AB Stoff zur Verwendung bei der Herstellung eines aufblasbaren Airbags

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0095537A1 (de) * 1982-06-02 1983-12-07 Teijin Limited Stark gedrehtes Polyester-Multifilamentgarn, und daraus hergestellter Stoff
EP0442373A1 (de) * 1990-02-12 1991-08-21 Hoechst Aktiengesellschaft Gewebe für Airbags
US5236775A (en) * 1990-02-12 1993-08-17 Hoechst Aktiengesellschaft Fabric for airbag

Also Published As

Publication number Publication date
EP2503037A1 (de) 2012-09-26
EP2503037B1 (de) 2021-04-28
EP2503038B1 (de) 2022-10-26

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