EP1432599A1 - Materiau pour airbag a base de non-tisse encolle par jet d'eau - Google Patents

Materiau pour airbag a base de non-tisse encolle par jet d'eau

Info

Publication number
EP1432599A1
EP1432599A1 EP02767262A EP02767262A EP1432599A1 EP 1432599 A1 EP1432599 A1 EP 1432599A1 EP 02767262 A EP02767262 A EP 02767262A EP 02767262 A EP02767262 A EP 02767262A EP 1432599 A1 EP1432599 A1 EP 1432599A1
Authority
EP
European Patent Office
Prior art keywords
airbag
filaments
airbag according
nonwoven fabric
woven fabric
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.)
Withdrawn
Application number
EP02767262A
Other languages
German (de)
English (en)
Inventor
Ernst J. Hauer
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.)
TECHNICAL MARKETING AND CONSULTING
Original Assignee
TECHNICAL MARKETING AND CONSUL
Technical Marketing and Consulting
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 TECHNICAL MARKETING AND CONSUL, Technical Marketing and Consulting filed Critical TECHNICAL MARKETING AND CONSUL
Publication of EP1432599A1 publication Critical patent/EP1432599A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/235—Inflatable members characterised by their material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/235—Inflatable members characterised by their material
    • B60R2021/23504—Inflatable members characterised by their material characterised by material
    • B60R2021/23509—Fabric

Definitions

  • the invention relates to an airbag which is used as a restraint system in motor vehicles to protect the occupants during accidents.
  • airbag modules consist of a gas generator which, in the event of an accident, explosively fills a shell made of plastic fibers with gas and thus catches the upper body of the occupant moving forward.
  • This cover hereinafter referred to as an airbag, is usually made from high-strength spun synthetic fibers, from polypropylene, polyester or polyamide.
  • the synthetic fibers are further processed into a textile fabric, in particular into fabrics, knitted fabrics, knitted fabrics or nonwovens, which in turn form the base material of the airbag either alone or in combination with one another.
  • processing aids such as spinning oils are used as sliding aids, in particular in weaving processes.
  • the influence of these processing aids on the fire behavior of the airbag is to be regarded as disadvantageous here.
  • the international standards FMVSS302 or DIN75200 require a horizontal fire spreading speed of less than 100mm / min with regard to airbags. To meet this requirement, the processing aids used must first be washed out and the textile fiber composite then dried.
  • nonwovens can also be used as the airbag material.
  • synthetic fibers are processed into a nonwoven fabric using staple fibers or directly via continuous fibers, also called filaments.
  • Thermal processes such as Calendering, or mechanical consolidation, such as needling, used.
  • the object of the invention is to use an airbag material which can be manufactured without the aid of chemical processing aids, has sufficient material strength and can be produced inexpensively.
  • a water jet bonded nonwoven is used as the airbag material.
  • the nonwoven fabric is produced using the spunbond process and is based on high-strength polymer filaments (continuous fibers).
  • the material properties of the high-strength filaments are changed insignificantly, and the resulting nonwoven is therefore sufficiently strong for use as an airbag.
  • the nonwoven fabric can be coated with a plastic to increase the gas tightness.
  • the airbag according to the invention is initially based on high-strength synthetic fibers which can be produced using different spinning processes.
  • the spinning mass is pressed into a so-called precipitation bath, which ensures that the filaments curdle (coagulate).
  • the melt spinning process can be used for meltable fiber materials.
  • melt created by the action of heat is pressed through nozzles.
  • the melt emerges from the spinnerets, is cooled and solidifies.
  • these are stretched after the spinning process and thus achieve a tensile strength of more than 40 cN / tex.
  • Typical examples of such high-strength filaments are polypropylene,
  • Filaments are immediately deposited on a conveyor belt to form a fleece. Fleece production takes place from filament formation to the final one
  • Thin water jets with high pressure ensure that the filaments swirl.
  • the thickness of the nonwoven fabric and its consolidation can be influenced by arranging the nozzles appropriately and changing the water pressure.
  • the strength of the individual filaments is only slightly reduced during consolidation.
  • spunbonded nonwovens can be water-jet bonded at a pressure of up to 600 bar.
  • a sufficient total strength of the final nonwoven fabric is achieved by the water jet consolidation of the high-strength synthetic polymer filaments, whereby the airbag according to the invention can only be produced from one layer of spunbonded fabric.
  • it can be provided with a silicone coating, for example.
  • Water-jet bonded nonwovens are extremely suitable for such plastic coatings, since no processing aids, such as spinning oils, have to be removed by an additional washing process.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

L'invention concerne un airbag pour automobiles, destiné à en protéger les passagers, en cas d'accident, produit à partir de non-tissé encollé par jet d'eau. Des filaments synthétiques très résistants sont utilisés pour produire le non-tissé. Les filaments utilisés peuvent être des fibres polymères en polypropylène, en polyester ou en polyamide, obtenues à l'aide de procédés de filage à sec ou de filage par fusion. Afin de réduire la perméabilité à l'air, le non-tissé peut également être muni d'un revêtement en matière plastique.
EP02767262A 2001-07-30 2002-07-24 Materiau pour airbag a base de non-tisse encolle par jet d'eau Withdrawn EP1432599A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
LU90810 2001-07-30
LU90810A LU90810B1 (en) 2001-07-30 2001-07-30 Airbagmaterial aus wasserstrahlverfestigtem Vliesstoff
PCT/EP2002/008339 WO2003011654A1 (fr) 2001-07-30 2002-07-24 Materiau pour airbag a base de non-tisse encolle par jet d'eau

Publications (1)

Publication Number Publication Date
EP1432599A1 true EP1432599A1 (fr) 2004-06-30

Family

ID=19732007

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02767262A Withdrawn EP1432599A1 (fr) 2001-07-30 2002-07-24 Materiau pour airbag a base de non-tisse encolle par jet d'eau

Country Status (3)

Country Link
EP (1) EP1432599A1 (fr)
LU (1) LU90810B1 (fr)
WO (1) WO2003011654A1 (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4536439A (en) * 1985-01-07 1985-08-20 E. I. Du Pont De Nemours And Company Light weight filter felt
TW211049B (fr) * 1991-03-26 1993-08-11 Du Pont
JPH05338510A (ja) * 1992-06-10 1993-12-21 Toyo Tire & Rubber Co Ltd エアーバッグ用基布及び該基布を用いたエアーバッグ
US5566434A (en) * 1994-06-15 1996-10-22 Jps Automotive Products Corporation Air bag for use in a motor vehicle and method of producing same
US5692777A (en) 1995-04-27 1997-12-02 Minnesota Mining And Manufacturing Company Low permeability inflatable restraint fabric
US5806155A (en) * 1995-06-07 1998-09-15 International Paper Company Apparatus and method for hydraulic finishing of continuous filament fabrics
DE19537703A1 (de) * 1995-10-11 1997-04-17 Hoechst Trevira Gmbh & Co Kg Textile Flächengebilde hoher Dichte aus Polyesterhybridgarnen, Verfahren zur Herstellung von Verbundwerkstoffen und Verwendung der textilen Flächengebilde
DE19852231A1 (de) * 1998-11-12 2000-05-18 Takata Europ Gmbh Luftsackmaterial

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03011654A1 *

Also Published As

Publication number Publication date
LU90810B1 (en) 2003-02-03
WO2003011654A1 (fr) 2003-02-13
WO2003011654A9 (fr) 2003-04-17

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