EP2503037B1 - Stoff zur Verwendung bei der Herstellung eines aufblasbaren Airbags - Google Patents

Stoff zur Verwendung bei der Herstellung eines aufblasbaren Airbags Download PDF

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Publication number
EP2503037B1
EP2503037B1 EP11159477.6A EP11159477A EP2503037B1 EP 2503037 B1 EP2503037 B1 EP 2503037B1 EP 11159477 A EP11159477 A EP 11159477A EP 2503037 B1 EP2503037 B1 EP 2503037B1
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EP
European Patent Office
Prior art keywords
fabric
fibres
bag
warp
weft
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.)
Active
Application number
EP11159477.6A
Other languages
English (en)
French (fr)
Other versions
EP2503037A1 (de
Inventor
Altay Kismir
David Stow
Gary Wootton
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
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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.)
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Publication date
Application filed by Autoliv Development AB filed Critical Autoliv Development AB
Priority to EP11159477.6A priority Critical patent/EP2503037B1/de
Priority to EP11169951.8A priority patent/EP2503038B1/de
Publication of EP2503037A1 publication Critical patent/EP2503037A1/de
Application granted granted Critical
Publication of EP2503037B1 publication Critical patent/EP2503037B1/de
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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. ultrasonic, 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 fabric for use in the manufacture of an inflatable air-bag, and a method of making the fabric.
  • Inflatable air-bags for use in occupant constraint systems in motor vehicles, are conventionally formed from woven fabrics. These fabrics typically comprise two sets of fibres, known as warp and weft fibres, which are interwoven with one another and arranged approximately at right angles to one another. A coating is often applied to such fabrics, and the coating provides the function of decreasing the permeability of the material, and maintaining the fibres in their intended positions.
  • the spacing between the fibres is increased, two undesirable effects typically result. The first is that there are larger gaps between the fibres. If the fabric is not coated, then this will increase the permeability of the fabric. If the fabric is covered with a coating, then the coating material will come under greater stress in the larger regions between the fibres when the pressure difference across the fabric is high. Clearly, this leads to an increased risk of rupturing of the coating material.
  • US2005/186873 discloses compositions and methods for treating textile substrates to obtain superior liquid repellent properties.
  • Durable microscopic surface structures imparted to the fibrous substrate allow liquids to bead up and roll off of its surface.
  • Mechanical abrasion or sanding techniques may be used to create the microscopic surface structures on the surface of a fibrous textile substrate, without substantially breaking fibers, followed by a chemical treatment using, for example, fluorocarbon-containing repellent compositions.
  • Particles may be employed in combination with repellent compositions to achieve superior repellent properties.
  • a property of the roughened surface fibers, the Roughness Factor is used to characterize the microscopic surface structures on the treated textile surface.
  • Treated textile substrates are disclosed which achieve superior water and oil repellency, even after multiple abrasion or laundering cycles.
  • US3761346 discloses a composite linear textile material comprises a bundle of filaments having a flexible foam of plastic composition surrounding the bundle, the outer surface of the coating being wrinkled and substantially continuous.
  • the filaments may be continuous glass filaments which may have a protective sizing thereon containing, for example, a wax, a cationic polyester resin, a gelatin and water-repellant substances, or the filaments may be of cotton, polyimides, polyesters, and cellulosics.
  • the coating may be of a vinyl resin such as polyvinyl chloride and the coating composition may contain plasticisers, cell size stabilizers, hand modifiers, fire retardants, pigments and other additives.
  • the fibres may be coated by passing them through a die through which the plastisol formulation is run.
  • WO2004/053213 discloses a process for forming a continuous filament yarn having the surface tactile character of a spun yarn.
  • the process includes passing the cohesive yarn structure through the interior of a rotating sleeve member disposed in surrounding relation to the cohesive yarn structure.
  • the rotating sleeve member includes an abrasive inner surface of diameter greater than the cohesive yarn structure and is adapted to contact the exterior surface of the cohesive yarn structure such that at least a portion of the elongate filaments disposed at the exterior of the cohesive yarn structure are broken. Terminal ends of the broken filaments define an arrangement of outwardly projecting hairs at discrete locations disposed substantially around the circumference of the cohesive yarn structure.
  • WO03/031711 discloses an industrial fabric used in the form of an endless fabric belt to form and convey a nonwoven fiber web during the manufacture of a nonwoven fabric has a web-supporting surface which includes rough-surface yarns which inhibit movement, namely, slippage, of the nonwoven fiber web relative to the web-supporting surface.
  • the rough-surface yarns make long floats in one or both directions, that is, lengthwise and/or crosswise, on the web-supporting surface.
  • JP62028435 discloses an industrial fabric used in the form of an endless fabric belt to form and convey a nonwoven fiber web during the manufacture of a nonwoven fabric has a web-supporting surface which includes rough-surface yarns which inhibit movement, namely, slippage, of the nonwoven fiber web relative to the web-supporting surface.
  • the rough-surface yarns make long floats in one or both directions, that is, lengthwise and/or crosswise, on the web-supporting surface.
  • EP2500454 A1 discloses a fabric for use in the manufacture of an inflatable air-bag, the fabric comprising interwoven warp fibres and weft fibres which are arranged substantially perpendicular to one another, one or more of the warp and weft fibres being at least partially coated with an adhesive substance to increase the friction between the warp and weft fibres at their intersections
  • the fabric is coated and has a cover factor of 55 % or lower.
  • EP2500454 A1 further discloses a fabric for use in the manufacture of an inflatable air-bag, the fabric comprising interwoven warp and weft fibres which are arranged substantially at right angles to one another, wherein each of at least one of the warp and weft fibres are formed from a core surrounded by an outer coating.
  • one aspect of the present invention provides a fabric for use in the manufacture of an inflatable air-bag, the fabric comprising interwoven warp and weft fibres which are arranged substantially perpendicular to one another, wherein at least one of the warp and weft fibres are formed from two or more filaments which are twisted, wound or assembled together, the fibres having non-uniform cross-sections to increase friction between the fibres at their intersections, the fabric having a cover value below around 55%, and a coating being applied to the fabric to decrease the permeability of the fabric.
  • At least one of the warp and weft fibres are coated with a roughening agent, to increase the surface roughness of the fibres.
  • a further aspect of the present invention provides an air-bag formed from a fabric according to any preceding claim.
  • a further aspect of the present invention provides a method of forming a fabric for use in the manufacture of an inflatable air-bag, comprising the steps of: forming at least one set of fibres from two fibre components comprising two or more filaments which are twisted, wound or assembled together; and interweaving the fibres with further fibres to form a fabric having a cover value below around 55%, wherein the fibres and further fibres comprise warp and weft fibres of the fabric and are arranged substantially at right angles to each other; and applying a coating to the fabric to decrease the permeability of the fabric.
  • Another aspect of the present invention provides a method of manufacturing an air-bag, comprising the steps of: forming a fabric in accordance with the above; and manufacturing the air-bag from the fabric.
  • each warp fibre 1 passes alternately under and over weft fibres 2 that are encountered along its length.
  • each weft fibre 2 passes alternately under and over warp fibres 1 that are encountered along its length.
  • the warp and weft fibres 1,2 of the fabric 3 are coated with a substance which increases the friction between the warp and weft fibres 1,2.
  • the substance does not produce an adhesive force between the fibres 1,2.
  • the coating comprises solid grains which are adhered to the surfaces of the fibres 1,2, producing an effect which is similar to coating the fibres 1,2 with sand.
  • the fibres are treated so that their surfaces acquire a texture, which may be regular or irregular.
  • One method of achieving this result is to expose the fibres to one or more jets of pressurised air (a technique known as "air texturing"), which imposes dents, ridges and other features in the surfaces of the fibres.
  • the surfaces of the fibres can be treated with a corrosive substance such as an acid, which will remove parts of the outer surface of the fibre, once again leading to surface features and irregularities.
  • a corrosive substance such as an acid
  • each fibre may be formed from two separate fibre components or filaments.
  • each fibre 9 may be formed from two or more thinner strands 10, 11, which are wrapped around each other, or interwoven with each other.
  • the strands 10,11 may be formed from the same material, or in alternative embodiments may be formed from different materials.
  • fibre when used in this specification, covers individual strands or filaments, as well as arrangements of two or more strands or filaments which are twisted, wound or otherwise assembled together to form a yarn or thread.
  • fibre 9 from one or more strands 10,11 will increase the surface texture of the fibre 9. If a plurality of such fibres 9 were to be woven into a fabric as shown in figure 1 , it will be understood that the fibres 9 would display a high resistance to sliding with respect to one another, as a fibre sliding with respect to a perpendicular fibre will continually encounter ridges which will provide strong resistance to this sliding motion.
  • the relationship between the amount of material comprising fibres, and the spaces therebetween, per unit area can be calculated, and the result is known as the "cover factor".
  • the cover factor allows fabrics made with different decitex fibres to be compared, and is also a useful way of describing a fabric without specifying a particular decitex value.
  • fibres are formed or treated to have non-uniform cross-sections. It is appreciated that all fibres, when inspected closely, will have variations in their cross-sections arising from imperfections in the materials from which the fibres are formed, or from the manufacturing process. However, when used in this specification this term refers to deviations from uniformity which are deliberately formed or applied, and are of a magnitude which is over and above those which arise from a standard manufacturing process for fibres of the type which are generally used to weave fabric for vehicle air-bags.
  • the fabric has a cover value of 55% or lower, and preferably below 54%. These values are lower than those found in conventional air-bag fabrics, but in using techniques described above robust and versatile fabrics having such low cover values are possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Woven Fabrics (AREA)
  • Air Bags (AREA)

Claims (5)

  1. Gewebe (3) zur Verwendung bei der Herstellung eines aufblasbaren Airbags, wobei das Gewebe verflochtene Kett(1)- und Schuss(2)fasern umfasst, die im Wesentlichen senkrecht zueinander angeordnet sind, wobei die Kett(1)- und/oder die Schuss(2)fasern aus zwei oder mehr Filamenten (10,11) ausgebildet sind, die verzwirnt, gedreht oder miteinander zusammengefügt sind, wobei die Fasern uneinheitliche Querschnitte aufweisen, um eine Reibung zwischen den Fasern an ihren Überschneidungen zu erhöhen, wobei das Gewebe einen Bedeckungswert unter etwa 55 % aufweist, und wobei eine Beschichtung auf das Gewebe aufgebracht wird, um die Durchlässigkeit des Gewebes zu verringern.
  2. Gewebe nach Anspruch 1, wobei die Kett(1)- und/oder die Schuss(2)fasern mit einem Aufraumittel beschichtet sind, um die Oberflächenrauheit der Fasern zu erhöhen.
  3. Airbag, der aus einem Gewebe nach einem der vorhergehenden Ansprüche ausgebildet ist.
  4. Verfahren zum Ausbilden eines Gewebes (3) zur Verwendung bei der Herstellung eines aufblasbaren Airbags, das die folgenden Schritte umfasst:
    Ausbilden wenigstens eines Satzes von Fasern aus zwei Faserkomponenten, die zwei oder mehr Filamente (10,11) umfassen, die verzwirnt, gedreht oder miteinander zusammengefügt sind;
    Verweben der Fasern (1,2) mit weiteren Fasern, um ein Gewebe auszubilden, das einen Bedeckungswert unter etwa 55 % aufweist, wobei die Fasern und die weiteren Fasern Kett- und Schussfasern des Gewebes umfassen und im Wesentlichen in rechten Winkeln zueinander angeordnet sind; und
    Aufbringen einer Beschichtung auf das Gewebe, um die Durchlässigkeit des Gewebes zu verringern.
  5. Verfahren zum Herstellen eines Airbags, das die folgenden Schritte umfasst:
    Ausbilden eines Gewebes nach Anspruch 4; und
    Herstellen des Airbags aus dem Gewebe.
EP11159477.6A 2011-03-23 2011-03-23 Stoff zur Verwendung bei der Herstellung eines aufblasbaren Airbags Active EP2503037B1 (de)

Priority Applications (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

Applications Claiming Priority (1)

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

Publications (2)

Publication Number Publication Date
EP2503037A1 EP2503037A1 (de) 2012-09-26
EP2503037B1 true EP2503037B1 (de) 2021-04-28

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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 After (1)

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

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2500454A1 (de) * 2011-03-16 2012-09-19 Autoliv Development AB Stoff zur Verwendung bei der Herstellung eines aufblasbaren Airbags

Family Cites Families (11)

* 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
EP0095537B1 (de) * 1982-06-02 1986-04-30 Teijin Limited Stark gedrehtes Polyester-Multifilamentgarn, und daraus hergestellter Stoff
JPS6228435A (ja) * 1985-07-23 1987-02-06 中興化成工業株式会社 吸音材
ES2041905T3 (es) * 1989-06-30 1993-12-01 Elastic-Berger Gmbh & Co. Banda de lona para cinturones de seguridad.
DE4004216A1 (de) * 1990-02-12 1991-08-14 Hoechst Ag Gewebe fuer einen airbag
US5236775A (en) * 1990-02-12 1993-08-17 Hoechst Aktiengesellschaft Fabric for airbag
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
WO2004053213A1 (en) * 2002-12-09 2004-06-24 Milliken & 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

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2500454A1 (de) * 2011-03-16 2012-09-19 Autoliv Development AB Stoff zur Verwendung bei der Herstellung eines aufblasbaren Airbags

Also Published As

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EP2503038A1 (de) 2012-09-26
EP2503038B1 (de) 2022-10-26
EP2503037A1 (de) 2012-09-26

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