WO2007118672A1 - Tissu - Google Patents

Tissu Download PDF

Info

Publication number
WO2007118672A1
WO2007118672A1 PCT/EP2007/003262 EP2007003262W WO2007118672A1 WO 2007118672 A1 WO2007118672 A1 WO 2007118672A1 EP 2007003262 W EP2007003262 W EP 2007003262W WO 2007118672 A1 WO2007118672 A1 WO 2007118672A1
Authority
WO
WIPO (PCT)
Prior art keywords
fabric
sacrificial
threads
heat protection
airbag
Prior art date
Application number
PCT/EP2007/003262
Other languages
German (de)
English (en)
Inventor
Graefe Hans-Albert
Original Assignee
Itg Automotive Safety Textiles 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 Itg Automotive Safety Textiles Gmbh filed Critical Itg Automotive Safety Textiles Gmbh
Publication of WO2007118672A1 publication Critical patent/WO2007118672A1/fr

Links

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
    • 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
    • B60R2021/23533—Inflatable members characterised by their material characterised by the manufacturing process
    • B60R2021/23542—Weaving

Definitions

  • the present invention relates to a fabric with warp thread and weft thread, with a heat protection device attached at least on one side of the fabric.
  • airbag systems are used in which airbags are used, which are also equipped with hot gas generators, among other things, to fill the airbags with gas and thus to inflate.
  • propellant gases are introduced into the airbag with temperatures up to 1000 ° C, which sometimes come into contact with the airbag fabric even at approximately these temperatures.
  • the fabric of the airbag is currently fully or partially constructed so that it can survive these temperatures without damage, d. H. for example, that such fabrics have such a high heat capacity that they can not burn through or that they are protected by a corresponding coating as heat protection against burn-through.
  • Heat protection devices which are attached to a single airbag require additional piece control in terms of their quality of execution, which means additional costs. If airbags are generally produced by using thicker yarns, for example dtex 700, to make them more heat-resistant, there is more space in the vehicle required, which also leads to an increase in costs. In addition, this is an addi tional silicone coating for the purpose of isolation partially required.
  • the invention has for its object to provide a tissue with a mounted on at least one tissue side heat protection device with which the known from the prior art disadvantages are avoided or at least greatly reduced.
  • a fabric according to claim 1 can already receive a heat protection device during the weaving process.
  • the fabric itself may be constructed of fine denier yarns, and if the fabric is used for an airbag in which several layers are sewn together, it follows due to the inventive design of the fabric that a sewing thread remains firmly anchored in the base fabric. Penetration points are covered by the construction of the heat protection device and thus can not be stretched. As a result, such a manufactured airbag retains its required quality features throughout the course of its use.
  • a tissue construction required for the case of an airbag may take account of the specific requirements of the generator intended for module assembly, wherein in a manufacturing process, namely weaving, binding, threading and / or thread thickness as well as material (eg polymer) for the heat protection device can be selected.
  • the woven sacrificial threads acting as a heat protection device form a protective barrier upon exposure to the tissue with hot fluids and protect the actual tissue from thermal attack, possibly destroying itself; hence the term sacrificial threads.
  • the tissue according to the invention thus consists, as it were, of a base fabric, preferably a construction in canvas 1/1 weave and a sacrificial fabric consisting of sacrificial threads and attached to at least one fabric side, which represents the heat protection device.
  • the sacrificial threads floating over the tissue in sections may be formed as weft threads.
  • the selection of sacrificial threads has no influence on the selection of the warp threads.
  • the fabric according to the invention also has sacrificial warp threads which in some cases float both over the weft threads and over the warp threads of the base fabric. This has the particular advantage that this construction is actually a sacrificial fabric of its own, which consists of woven-in warp and weft sacrificial threads and has been selectively applied to the ground fabric.
  • the fabric is formed as a two-day fabric with an upper fabric and a lower fabric, wherein the heat protection devices of the upper fabric and the lower fabric are each arranged facing each other.
  • This construction is now especially for use in one-piece woven airbags, so-called OPW airbags advantage.
  • OPW airbags advantage.
  • tissue areas are arranged with a lower tissue and an upper fabric, which pass in places in single-ply areas or even once again "branched" in multi-layered areas.
  • the construction of a multi-ply OPW airbag as such is known to the person skilled in the art and is therefore not particularly carried out at this point.
  • the fabric is executed with woven sacrificial threads having non-round cross-sections.
  • Fabric as well as with the airbag according to the invention can be achieved, in particular by the latter embodiment with woven sacrificial threads with non-round cross-sections, the advantageous effect that when pressure applied to an airbag formed therefrom or airbags, the sacrificial tissue to the adjacent fabric layer sealingly applies and in this case the permeability of the tissue - in response to the pressurization - changes.
  • a method for controlling the internal pressure in an airbag is proposed, which is characterized by using a fabric according to one of claims 1 to 9 for the wall of the airbag, wherein the air permeability (LD) in dependence on the pressure load is controlled in the airbag.
  • LD air permeability
  • the method is characterized in that the air permeability (LD) is lowered for control with increasing Luftsack- internal pressure.
  • LD air permeability
  • an airbag with variable or load-equivalent air permeability (LD) or corresponding permeability can be created in which the permeability is high at low internal pressure and decreases with increasing airbag internal pressure, since the tissue "closes as the pressure increases "or because the tissue pores widening under pressure are closed by pressing the sacrificial thread.
  • LD load-equivalent air permeability
  • the fabric is executed with sacrificial threads, which have flat, triangular, polygonal, ribbon-shaped or oval cross-sections. This simplifies the individual adaptation of the fabric to the required dynamic permeability properties.
  • Fig. 1 shows a schematic representation of an OPW fabric in section with embroidery in satin weave and L 1/1 -Grunditati.
  • FIG. 2 shows the schematic representation of a sectional view of a flat fabric with embroidery stitch in satin weave and L 1/1 plain weave.
  • Fig. 3 shows a binding cartridge and a schematic representation of a sectional view of a L 1/1 flat tissue with a sacrificial tissue consisting of warp and
  • Shot Atlas. 4 schematically shows a side belt airbag for motor vehicles, designed as an OPW
  • Fig. 2 shows a detail of the sectional view of a flat fabric 2 with warp threads 21 and 22 and with weft threads Sl, S2 and OSS.
  • the warp threads are regularly shown as small circles.
  • the weft threads are regularly drawn as solid lines.
  • the skilled person is familiar with this representation. It applies to the entire description presented here.
  • the sacrificial embossment OSS only shows the tissue side 2 of the tissue 2 in this representation of the upper tissue side.
  • a sequence of weft threads Sl, S2 and OSS is shown.
  • the repeatedly repetitive firing sequence finally results in the tissue and, thus, parallel sacrificial weft threads OSS as a protective device in front of the actual tissue 2.
  • the so-called sacrificial layer consists of the sacrificial stipple wefts OSS, introduced as a protective atlas using the stick-shooting technology (see above).
  • L 1/1 flat fabric means "plain weave flat fabric with 1: 1 weft sequence".
  • FIG. 3 a sectional image of an L 1/1 flat fabric with a sacrificial fabric consisting of warp and weft atlas can be seen again in the lower part.
  • the sacrificial tissue results from the weft threads OSSl to 0SS8 and the sacrificial warp threads 031, whose bonding points with the base fabric are also shown here as small circles.
  • the base fabric 3 includes weft threads 3S1 and 3S2 and the warp threads 332, which are only partially indexed for the sake of clarity.
  • X in the cartridge indicates a binding point of a sacrificial embossment and means a warp lift.
  • O denotes a setting point of a sacrificial string, which means a warp reduction in the L 1/1 shot of the background fabric.
  • a black filled square in the cartridge according to Fig. 3 means a warp
  • a white or blank square means a warp reduction. If a hot generator gas now flows in the direction of the thickly marked arrow G onto the fabric 3 illustrated schematically in FIG. 3, this works in front of the base fabric, consisting of weft threads 3S1 to 3S8 and warp threads 332, "pre-hung" atlas of sacrificial threads OSS1 to OSS8 and 031 as a heat protection device in the form of a sacrificial tissue. The base fabric is thus protected by the heat protection device formed from said sacrificial threads.
  • Fig. 1 shows a further embodiment of the present invention as a schematic representation of an OPW fabric in section, with embroidery stitch in satin weave and canvas 1/1 -Grunditati.
  • the upper fabric OG consists of weft yarns Ol and 02 and sacrificial stick shot SO, which shows the sacrificial embossment SU of the lower fabric UG, which is formed as a base fabric of the weft threads Ul and U2.
  • the mutually facing, over the warp threads KO and KU partially floating sacrificial threads SO and SU which represent the respective heat protection device of the upper fabric and the lower fabric, are clearly visible in Fig. 1.
  • the letters G symbolize that these are the "action points" of a very high temperature generator gas which would attack the upper and lower tissues if they were not protected by the sticky sacrificial threads SO and SU, respectively.
  • FIG. 4 schematically shows a construction of a side curtain airbag 4 equipped with the fabric according to the invention, wherein a fabric according to the invention is used in a special area OS of the airbag 4.
  • the configuration according to FIG. 4 relates exemplary on so-called Heilmo module, in which from the direction of the arrow G generator gas is passed into the airbag.
  • the inventive design of a fabric introducing additional mass of material in the form of a selectively connected to the actual airbag fabric or partially incorporated in this separate fabric layer as sacrificial fabric respectively heat protection device is possible.
  • This can also be arranged on the inside of an OPW airbag via the stick-shooting technology.
  • the use of a low-cost material for the sacrificial tissue of the heat protection device instead of the material for the actual airbag considerable cost savings.
  • the weaving technique of a sacrificial layer in the interior of a double fabric the production of a flat fabric with woven sacrificial layer, their bonding with the ground fabric and with each other or partially into each other, as a bond more than three-stranded (eg twill, atlas, etc.) and / or as a double fabric in each L 1/1 basic construction with bonding points in warp and weft direction more than three times using the embroidery gun technology.
  • the weaving in of the sacrificial thread in the firing change is carried out according to the design of the embroidery gun on the zones which are particularly heat-stressed according to the design (OS in more than three-bladed shot atlas), whereby the firing order is 1: 1, 1: 2 or higher, depends on titer, polymer and desired protective effect.
  • the sacrificial thread is generally a low cost product, either with a melting point lower than that of PA 6.6 (eg, PP), to absorb so much energy under heat stress that the residual energy does not damage the ground fabric, or with a higher melting point, to increase the heat capacity increase.
  • a sacrificial layer on an as yet symmetrical airbag fabric is formed by a weft atlas with an odd number of offsets (for a L 1/1 basic fabric) and greater than 3 (e.g., eight-bind), ( Figure 3).
  • the binding points of the embroidery shots from additional yarn (OSSl to OS S 8) in the L 1/1 basic fabric are to be laid in the direction of impact so that an even bonding point is provided with the respectively preceding weft thread of the background fabric.
  • the flat fabric according to the invention is particularly advantageous, for example as an insert as a patch or as a heat protection device.
  • the sacrificial thread is introduced as a shot atlas into a symmetrical base fabric (all-over arrangement) according to the embroidery gun technology.
  • an L 1/1 base fabric with a sacrificial tissue also setting in L 1/1 is shown.

Landscapes

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

Abstract

Tissu comprenant des fils de chaîne et des fils de trame, avec un dispositif de protection thermique appliqué au moins d'un côté du tissu, caractérisé en ce que le dispositif de protection thermique présente des fils (OSS) sacrifiés tissés qui flottent par sections sur le tissu (2).
PCT/EP2007/003262 2006-04-12 2007-04-12 Tissu WO2007118672A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006017274.4 2006-04-12
DE200610017274 DE102006017274A1 (de) 2006-04-12 2006-04-12 Gewebe

Publications (1)

Publication Number Publication Date
WO2007118672A1 true WO2007118672A1 (fr) 2007-10-25

Family

ID=38229259

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/003262 WO2007118672A1 (fr) 2006-04-12 2007-04-12 Tissu

Country Status (2)

Country Link
DE (1) DE102006017274A1 (fr)
WO (1) WO2007118672A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9885130B2 (en) 2010-02-26 2018-02-06 Sanko Tekstil Isletmeleri Sanayi Ve Woven fabric that looks and performs like a knitted fabric and method of making thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29711904U1 (de) * 1997-07-07 1997-11-06 Trw Repa Gmbh Gassack für ein Rückhaltesystem in Fahrzeugen und Gewebe zu seiner Herstellung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29916700U1 (de) * 1999-09-22 2000-02-03 Trw Repa Gmbh Gassack
TWI230213B (en) * 2000-08-17 2005-04-01 Toray Industries Base fabric for non-coated air bags, and fibers for air bags
DE10115890C2 (de) * 2001-03-30 2003-07-17 Berger Seiba Technotex Verwaltungs Gmbh & Co Verfahren zum Weben eines Luftsacks
EP1357207B1 (fr) * 2002-04-24 2009-11-18 Polyamide High Performance GmbH Fil à haute tenacité avec filaments profilés

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29711904U1 (de) * 1997-07-07 1997-11-06 Trw Repa Gmbh Gassack für ein Rückhaltesystem in Fahrzeugen und Gewebe zu seiner Herstellung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9885130B2 (en) 2010-02-26 2018-02-06 Sanko Tekstil Isletmeleri Sanayi Ve Woven fabric that looks and performs like a knitted fabric and method of making thereof
US10221506B2 (en) 2010-02-26 2019-03-05 Sanko Tekstil Isletmeleri San. Ve Tic. A.S. Method of making woven fabric that performs like a knitted fabric
US11519108B2 (en) 2010-02-26 2022-12-06 Sanko Tekstil Isletmeleri San. Ve Tic. A.S. Woven fabric that looks and performs like a knitted fabric and method of making thereof

Also Published As

Publication number Publication date
DE102006017274A1 (de) 2007-10-18

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