EP2398677A1 - Sac gonflable - Google Patents

Sac gonflable

Info

Publication number
EP2398677A1
EP2398677A1 EP10705293A EP10705293A EP2398677A1 EP 2398677 A1 EP2398677 A1 EP 2398677A1 EP 10705293 A EP10705293 A EP 10705293A EP 10705293 A EP10705293 A EP 10705293A EP 2398677 A1 EP2398677 A1 EP 2398677A1
Authority
EP
European Patent Office
Prior art keywords
fabric
polyester yarn
airbag
yarn
airbag according
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.)
Ceased
Application number
EP10705293A
Other languages
German (de)
English (en)
Inventor
Philipp Ritter
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.)
ZF Automotive Germany GmbH
Original Assignee
TRW Automotive GmbH
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 TRW Automotive GmbH filed Critical TRW Automotive GmbH
Publication of EP2398677A1 publication Critical patent/EP2398677A1/fr
Ceased 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
    • 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
    • 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 a gas bag.
  • gas bags are preferably made of a polyamide fabric, often using PA66 (nylon) as the yarn for the fabric.
  • PA66 nylon
  • the object of the invention is to provide an airbag containing a fabric with a polyester yarn, while retaining the positive properties of a gas bag with a nylon fabric.
  • an airbag having a fabric containing a polyester yarn whose elongation at break is about 20% to 30%, more preferably about 24% to 25% and whose shrinkage is less than about 1%, especially less than 0.5%. It is the properties of the yarn that largely determine the properties of the fabric. In order to be suitable for use in an airbag, the yarn must have the greatest possible extensibility with sufficient strength or tear resistance and at the same time have the lowest possible shrinkage in terms of heat or moisture. The parameters mentioned ensure that the technical requirements for an airbag can be met.
  • the toughness of a game is generally inversely related to its extensibility so that high tenacity yarns have lower elongation and vice versa.
  • the toughness of the polyester yarn used in the invention is preferably between about 65 cN / tex and 75 cN / tex, in particular between about 70 cN / tex and 71 cN / tex.
  • the breaking strength of the polyester yarn is preferably 30% to 40%, especially about 33% to 34%.
  • the coverage factor of the fabric in gas bags made of polyamide yarn is advantageously between approximately 1800 and 2000.
  • Polyester has a higher specific gravity (1, 38 compared to 1, 14) and thus a smaller volume than nylon.
  • the higher specific density must be taken into account and compensated for by a larger thread thickness.
  • a fabric made from a nylon yarn having a denier of 347 denier in a weave assembly of 50 warp or weft threads / inch has a coverage factor of 1863.
  • the thread thickness must be varied specific densities, so that the present invention preferably yields a 420 denier yarn count for a polyester yarn equivalent in volume to a 347 denier nylon yarn.
  • the thread thickness of the polyester yarn is preferably between about 400 and 450 denier.
  • the polyester yarn has an ITC factor of greater than about 1%, where ITC stands for Instantaneous Thermal Creep. This was measured at 100 0 C.
  • ITC Instantaneous Thermal Creep. This was measured at 100 0 C.
  • the ITC value was determined analogously to the method specified in US Pat. No. 7,375,042.
  • Figure 1 shows schematically a gas bag according to the invention
  • Figure 2 is a diagram showing the adhesion of a coating to various tissues, including a fabric of a gas bag according to the invention
  • FIG. 1 shows an airbag 10 in the form of a conventional curtain-type side airbag.
  • the gas bag 10 could just as well be of any other type, such as a driver or passenger gas bag, an unfolding from the back seat side airbag or a knee gas bag.
  • the gas bag 10 consists of a fabric of a polyester yarn with a filament count of 96, a breaking strength of 33.5 N, a toughness of 70.6 cN / tex, an elongation at break of 24.4%, and a shrinkage of 0.3%.
  • the shrinkage was measured by the method ASTM D 4974, in which a relaxed yarn sample is subjected to a dry heat at a predetermined tension for a predetermined time.
  • the load is 0.05 cN / dtex at a temperature of 177 ° C. for a period of 10 minutes.
  • the mean ITC size was determined to be 1, 5% (with a standard deviation of 21%).
  • the fabric was produced by water jet and then provided with a silicone coating of 25 g / m 2 (Bluestar TCS 7534). The tissue was freshly used from the loom without further pretreatment. Further data on this test compared to the similarly coated conventional fabric of 470 dtex PA66 yarn are shown in Table 2.
  • FIG. 2 shows a filling test with two gas bags produced according to the invention with identical parameters.
  • a pressure of 50% of the peak pressure after 5 seconds is considered sufficient for rollover protection.
  • An advantage of the low shrinkage rate of the yarn is also that the width of the fabric web can be better utilized, which has a positive effect on the arrangement of the airbag blanks.
  • a maximum reed width of 230 cm can be achieved.
  • Using a typical nylon yarn results in a maximum usable fabric width of about 200 cm.
  • a usable width of 210 cm can be set with the same machine. The same is true when using a Jacquard weaving machine for integrally woven airbags.
  • These weaving machines usually work after the rapier process or with air jets. Typically, they have a maximum reeling width of 280 cm, which results in the maximum usable fabric width of about 245 cm when using a conventional nylon thread. This allows a maximum airbag height in a four-row blank arrangement of about 600 mm. With the polyester yarn used here, however, a gas bag height of 625 mm can be achieved. In the case of a five-row sectional arrangement, corresponding airbag heights of 500 mm can be achieved.

Landscapes

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

Abstract

L'invention concerne un sac gonflable présentant un tissu constitué d'un fil de polyester, dont l'allongement à la rupture s'élève à environ 20-30 %, en particulier à environ 24-25 %, et dont le rétrécissement est inférieur à environ 1 %, en particulier inférieur à 0,5 %.
EP10705293A 2009-02-20 2010-02-17 Sac gonflable Ceased EP2398677A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009009905A DE102009009905A1 (de) 2009-02-20 2009-02-20 Gassack
PCT/EP2010/000977 WO2010094456A1 (fr) 2009-02-20 2010-02-17 Sac gonflable

Publications (1)

Publication Number Publication Date
EP2398677A1 true EP2398677A1 (fr) 2011-12-28

Family

ID=42111826

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10705293A Ceased EP2398677A1 (fr) 2009-02-20 2010-02-17 Sac gonflable

Country Status (6)

Country Link
US (1) US20110316259A1 (fr)
EP (1) EP2398677A1 (fr)
CN (1) CN102325673B (fr)
BR (1) BRPI1008291A2 (fr)
DE (1) DE102009009905A1 (fr)
WO (1) WO2010094456A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8770662B2 (en) * 2010-05-27 2014-07-08 Auto Expressions, Llc Vehicle seat cover
RU2577929C2 (ru) * 2010-10-04 2016-03-20 Инвиста Текнолоджиз С.А.Р.Л. Автомобильные боковые модули с подушкой-шторкой безопасности, содержащие полиэстеровые подушки безопасности с газовыми нагнетателями
EP2597180A1 (fr) * 2011-11-24 2013-05-29 Autoliv Development AB Améliorations associées à des tissus d'airbag
WO2019146286A1 (fr) * 2018-01-26 2019-08-01 東レ株式会社 Tissu de base, métier à tisser à jet et procédé de production de tissu de base

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4004216A1 (de) * 1990-02-12 1991-08-14 Hoechst Ag Gewebe fuer einen airbag
EP0509399B1 (fr) * 1991-04-15 1996-03-20 Hoechst Aktiengesellschaft Tissus pour des coussin d'air
EP0562458A1 (fr) * 1992-03-25 1993-09-29 Akzo Nobel N.V. Tissu technique avec résistance à la température élevée
US5474836A (en) * 1993-01-06 1995-12-12 Teijin Limited Polyester filament woven fabric for air bags
DE4308871A1 (de) * 1993-03-19 1994-09-22 Akzo Nv Gewebe für die Herstellung von Airbags
DE4401003A1 (de) * 1994-01-17 1995-07-20 Hoechst Ag Gewebe hoher Drapierfähigkeit, Verfahren zu dessen Herstellung, dessen Verwendung zur Herstellung von Airbags sowie Airbag aus diesem Gewebe
DE19537699A1 (de) * 1995-10-11 1997-04-17 Hoechst Trevira Gmbh & Co Kg Schwerentflammbare Gewebe enthaltend phosphor-modifizierte Polyesterfasern, Airbags daraus und deren Verwendung
WO2004106120A1 (fr) * 2003-05-15 2004-12-09 Invista Technologies S.A.R.L. Toile tissee a filaments polyester pour coussins de securite gonflables
WO2008094317A1 (fr) 2007-02-02 2008-08-07 Invista Technologies S.A.R.L. Tissu de polyester tissé pour coussins d'air

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2010094456A1 *

Also Published As

Publication number Publication date
CN102325673B (zh) 2014-10-22
BRPI1008291A2 (pt) 2019-09-24
DE102009009905A1 (de) 2010-08-26
CN102325673A (zh) 2012-01-18
WO2010094456A1 (fr) 2010-08-26
US20110316259A1 (en) 2011-12-29

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