WO2013095054A1 - 아라미드 원단 및 이를 포함하는 차량용 에어백 - Google Patents
아라미드 원단 및 이를 포함하는 차량용 에어백 Download PDFInfo
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- WO2013095054A1 WO2013095054A1 PCT/KR2012/011287 KR2012011287W WO2013095054A1 WO 2013095054 A1 WO2013095054 A1 WO 2013095054A1 KR 2012011287 W KR2012011287 W KR 2012011287W WO 2013095054 A1 WO2013095054 A1 WO 2013095054A1
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- fabric
- aramid
- aramid fabric
- airbag
- layer
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Classifications
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- 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
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- 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
-
- 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
- B60R21/34—Protecting non-occupants of a vehicle, e.g. pedestrians
- B60R21/36—Protecting non-occupants of a vehicle, e.g. pedestrians using airbags
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- 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
- D03D15/20—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 material of the fibres or filaments constituting the yarns or threads
- D03D15/283—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 material of the fibres or filaments constituting the yarns or threads synthetic polymer-based, e.g. polyamide or polyester fibres
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- 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
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/693—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural or synthetic rubber, or derivatives thereof
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
- D06N3/0015—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using fibres of specified chemical or physical nature, e.g. natural silk
- D06N3/0034—Polyamide fibres
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/04—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06N3/10—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds with styrene-butadiene copolymerisation products or other synthetic rubbers or elastomers except polyurethanes
-
- 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
- B60R2021/23514—Fabric coated fabric
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2211/00—Specially adapted uses
- D06N2211/12—Decorative or sun protection articles
- D06N2211/26—Vehicles, transportation
- D06N2211/268—Airbags
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/02—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/02—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides
- D10B2331/021—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides aromatic polyamides, e.g. aramides
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2505/00—Industrial
- D10B2505/12—Vehicles
- D10B2505/124—Air bags
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
- Y10T442/2861—Coated or impregnated synthetic organic fiber fabric
- Y10T442/2893—Coated or impregnated polyamide fiber fabric
- Y10T442/2902—Aromatic polyamide fiber fabric
Definitions
- the present invention relates to an aramid fabric and a vehicle airbag including the same. More specifically, it can withstand a high level of layer force and can exhibit excellent air barrier properties, form stability and storage properties, and thus is suitable as a material for a vehicle exterior airbag. Applicable to aramid fabric and a vehicle airbag comprising the same.
- an air-bag detects a collision stratification applied to a vehicle when the vehicle is in front or side stratification at a certain speed, and then explodes a gun powder to supply gas into the air bag.
- ⁇ Inflation refers to a device that protects the driver and passengers.
- the material for exterior airbags is different from that for general interior airbags. Similarly, it is necessary to exhibit excellent air barrier effect and form stability, and to be able to be compactly folded to exhibit excellent storage.
- the present invention provides an aramid fabric that can withstand a high level of impact while exhibiting excellent air barrier properties, form stability, and storage properties, and can be suitably applied as a material for vehicle exterior airbags.
- the present invention also provides a vehicle airbag, in particular : a vehicle exterior airbag comprising the aramid fabric.
- the present invention is an aramid fabric layer containing aramid yarn having a fineness of 300 to 1000 denier; And a rubber coating layer on the aramid fabric layer, wherein the inclination elongation index (TI wa ) of the fabric defined by Formula 1 is 2.8 to 4.8,
- the coating amount of the rubber coating layer provides an aramid fabric of 20 g / m 2 to 100 g / m 2 :
- T jwa T wa / ( -s wa ⁇ D )
- T wa is the inclination tensile strength (N / 5cm) of aramid fabric measured by ISO 13934-1 method
- S wa is the tensile tensile elongation (%) of aramid fabric measured by the International Organization for Standardization ISO 13934-1.
- D is the fineness of the aramid yarn (de).
- the present invention also provides a vehicle airbag comprising the aramid fabric.
- aramid fabric according to a specific embodiment of the present invention, and a vehicle airbag including the same will be described in more detail.
- this is presented as an example of the invention, whereby It is apparent to those skilled in the art that various modifications to the embodiments are possible without departing from the scope of the rights and scope of the invention.
- Constant refers to including any component (or component) without particular limitation and should not be construed to exclude the addition of other components (or components).
- the fabric according to the embodiment of the present invention basically includes a fabric layer including an aramid yarn, the yarn having a range of fineness, and the rubber coating layer having an optimized coating amount is formed on the fabric layer.
- the aramid fabric according to this embodiment is to satisfy the specific physical properties, for example, a specific range of inclination elongation index (TI wa ) defined by the formula (1).
- the fabric of this embodiment basically comprises a fabric layer comprising aramid yarn.
- aramid yarn is a kind of aromatic polyamide fiber, which has been known to have excellent heat resistance and mechanical properties.
- Fabric of one embodiment includes such aramid yarn and the fabric layer, it can exhibit excellent heat resistance and mechanical properties, higher layer force : it can withstand high temperature and high pressure well.
- nylon-based fabrics which were previously used as general airbag fabrics, it was difficult to meet the high level of mechanical properties required for exterior airbags.
- the tensile strength of the fabric was not sufficient, so that it was difficult to withstand the high level of layer force applied to the exterior airbag.
- the above-described aramid fabric worm is applied, it can withstand a higher level of impact force and exhibit excellent mechanical properties.
- the aramid fabric of the embodiment is to adjust the fineness and density of the aramid yarn in a certain range to achieve a suitable cover factor range of the fabric layer, and to control the overall physical properties such as the coating amount of the rubber component in a specific range of the fabric It is provided to satisfy the inclination elongation index (TI wa ) and the like.
- the aramid fabric of one embodiment that satisfies such an inclination ductility index (TI wa ) and the like can withstand a high level of impact force applied to the exterior airbag and It was confirmed that not only can be absorbed and completed, but also exhibited an appropriate degree of flexibility and excellent storage properties.
- by optimizing the coating amount of the rubber coating layer applied to the aramid fabric layer it is possible to secure the excellent mechanical properties and air blocking effect of the fabric and at the same time maximize the layer-absorbing performance for pedestrians.
- the aramid fabric of one embodiment can be very preferably used as the fabric of vehicle airbags, in particular vehicle exterior airbags.
- Aramid fabric of this embodiment includes an aramid fabric layer comprising aramid yarn having a fineness of about 300 to 1000 denier, or about 400 to 900 denier; And a rubber coating layer on the aramid fabric layer, wherein the inclination direction elongation index (TI wa ) of the fabric defined by Formula 1 is about 2.8 to 4.8, or about 3.0 to 4.7, and the coating amount of the rubber coating layer is about 20 g / m 2 to 100 g / m 2 , black may be from about 25 g / m 2 to 80 g / m 2 :
- T wa is the inclination tensile strength (N / 5cm) of aramid fabric measured by ISO 13934-1 method
- S wa is the tensile tensile elongation (%) of aramid fabric measured by the International Organization for Standardization ISO 13934-1.
- D is the fineness of the aramid yarn (de).
- the aramid fabric of this embodiment may have a weft direction elongation index (TI we ) of about 3.4 to 5.4, or about 3.7 to 5.2 of the fabric defined by Formula 2 below.
- TI we weft direction elongation index
- T we is the weft direction tensile strength (N) of aramid fabric measured by the International Organization for Standardization ISO 13934-1 method,
- D is the fineness of the aramid yarn (de).
- the aramid fabric of one embodiment uses an aramid yarn, while the tensile strength and elongation is optimized by adjusting the physical properties of the yarn and fabric, such as the fineness and density of the yarn and the cover factor and coating amount As a result, it can effectively absorb the energy of the hot-high pressure gas and withstand a high level of layer force.
- the fabric may comprise a low-density high strength aramid yarn, the aramid yarn may be about 300 to 1000 denier fineness.
- the aramid fabric may have a tilt direction elongation index (TI wa ) of about 2.8 to 4.8, or about 3.0 to 4.7, which is defined by Formula 1, which is controlled by controlling the properties of the yarn and fabric described above. It can be achieved by optimizing the inclination tensile strength (T wa ) and tensile elongation (S wa ) and the like.
- TI wa tilt direction elongation index
- Aramid fabric that satisfies the TI wa index shows improved toughness and energy absorption performance compared to conventional nylon and PET fabrics, and can exhibit excellent folding, flexibility, and storage properties as an airbag fabric. .
- the aramid fabric is the fabric by optimizing the tensile strength (T we ) and tensile elongation (S we ) in the weft direction as well as the tensile strength (T wa ) and tensile elongation (S wa ) of the warp direction as described above. While maintaining the excellent mechanical properties of the morphological stability, storage properties, air blocking effect can be improved.
- the weft direction elongation index (TI we ) of the fabric defined by the formula (2) is about 3.4 to 5.4, The black may be about 3.7 to 5.2.
- the aramid fabric of one embodiment is the mechanical strength of the final fabric by controlling the tensile strength and elongation of the fabric at the same time at the same time with the fineness of the yarn constituting the fabric to effectively absorb the laminar energy generated instantaneously during airbag operation
- Physical properties and folding properties can be improved together.
- With high strength and heat resistance to withstand high pressure and high temperature inflator gas caused by explosives inside the airbag it has tensile strength and elongation for effective deployment and excellent folding. Need to optimize At this time, the tensile strength and tensile elongation of the fabric need to be adjusted so as to satisfy the range of the elongation index of the fabric as described above.
- the tensile strength of the fabric represented by T wa in the formula 1 That is, the inclination tensile strength of the aramid fabric is about 4000 N / 5cm or more, for example, about 4000 N / 5cm to 9000 N / 5cm, or About 4100 N / 5 cm to 8800 N / 5 cm.
- the tensile elongation of the fabric represented by S wa in the formula 1, that is, the inclination tensile elongation of the aramid fabric is about 2.0% or more, for example, about 2.0% to 8.0%, black about 2.5% or more or 2.5% To 5.0%.
- the energy absorbing performance during air bag deployment is improved. I can secure it. If the tensile strength and the tensile elongation of the fabric cannot be maintained above the minimum value, it may be mounted on the outside of the vehicle and may not exhibit sufficient layer absorption performance.
- the inclination ductility index (TI wa ) of the fabric is about 2.8 or more in terms of satisfying the stratification absorption performance for the vehicle and passengers when the airbag is deployed, and about 4.8 or less is about the storage capacity of the airbag cushion assembly.
- the inclination direction elongation index (TI wa ) of the fabric is less than about 2.8, the fabric itself is low, so that the fabric is easily torn during airbag deployment, which may be difficult to use.
- the inclination elongation index (TI wa ) of the fabric exceeds about 4.8, the fabric's stiffness is too increased to reduce the folding property of the airbag cushion can be difficult to apply to airbag applications.
- the weft direction elongation index (TI we ) of the fabric may be about 3.4 to 5.4.
- the aramid fabric layer of the uncoated state has a heat resistance constant (X) of about 6.5 to 400, for example, For example, about 13.0 to 350, or about 80 to 200.
- T is the temperature of the hot-rod free fall to the fabric layer has a temperature range of 350 to 750 ° C
- t indicates the time taken to free fall the hot rod, from the contact of the hot rod to the end of the traverse layer, and the time (sec)
- D ' represents the thickness (mm) of the aramid fabric layer.
- the aramid fabric of one embodiment is applied as an air bag fabric that can effectively absorb and withstand the energy of high-temperature gas It was confirmed that.
- the heat-resistant constant (X) of the fabric layer before the coating treatment with the rubber component in the aramid fabric shows about 6.5 or more, or about 13.0 or more, so that it can effectively absorb and withstand the energy of high-temperature-high pressure gas and fabrics for airbags. It has been confirmed that it can be used very effectively.
- the heat resistance means the residence time until the hot rod passes through the fabric layer based on the thickness of the aramid fabric layer, as shown in Equation 3 above. It means the heat resistance index of the fabric layer for air bags under the conditions.
- the heat resistance constant is an arbitrary value that varies depending on the fabric material for the airbag, and simulates how much the fabric layer and fabric for the airbag can withstand the instantaneous hot-high pressure gas emitted from the inflator when the airbag is deployed. As a heat-resistant constant that can be simulated, the higher the fusion heat capacity ( ⁇ ) of aramid yarn, the higher the heat-resistant constant of the fabric layer.
- the heat resistance constant of the aramid fabric layer is small, the heat resistance of the fabric that can withstand the high temperature-high pressure gas generated in the inflator during air bag deployment is inferior, so that the burst or heat fusion occurs when applied for the air bag Done. Therefore, if the heat resistance constant of the arimid fabric layer in the fabric of one embodiment, for example, less than about 6.5, the exterior airbag cushion can be developed and melted before full bloom, making it difficult to apply for airbags, especially for exterior airbags. Can be.
- the aramid fabric of one embodiment further comprises a rubber coating layer formed by coating or laminating a rubber component on the aramid fabric layer surface.
- the aramid fabric coated with the rubber component may have a heat resistance (X) of about 200 or more, for example, about 200 to 350, when the temperature (T) of the hot rod is 750 ° C.
- the rubber component may include, for example, a silicone rubber or a polyurethane rubber, and more specifically, a powder type silicone, a liquid type silicone, a polyurethane, and an emulsion type silicone resin.
- a silicone rubber or a polyurethane rubber and more specifically, a powder type silicone, a liquid type silicone, a polyurethane, and an emulsion type silicone resin.
- the coating amount per unit area of the rubber coating layer may be about 20 g / m 2 to 100 g / m 2 , or about 25 gm 2 to 80 g / m 2 .
- such a rubber coating layer may be formed by coating a rubber component a single time, but may be formed in the above-described coating amount by two or more coatings of such a rubber component. That is, in consideration of the development of the fabric in the state where the airbag is operated when the airbag is operated, the first coating is carried out, and then the second coating is smoothed to improve the friction between the fabrics. May be formed. At this time, the secondary coating may be carried out with a coating amount of about 10 g / m 2 or less.
- the above-mentioned heat resistance constant can be measured using a hot rod tester as shown in FIG.
- the hot rod is placed in the measuring device so that the hot rod tester is heated to about 350 to 750 ° C. and then dropped in the upward direction of the fabric (layer).
- the hot-rod is freely dropped from the top of the aramid fabric (layer) toward the fabric (layer)
- the hot-rod is brought into contact with the aramid fabric (layer) after the hot-rod contacts the fabric (layer).
- the heat resistance constant of the aramid fabric (layer) can be obtained.
- the hot rod may be disposed in the upward direction of the fabric so that the distance (d) from the aramid fabric (layer) is about 60 to 85 mm away.
- the hot rod has a thermal conductivity of about 40 to 70 W / m.
- a metal or ceramic material of K and having a weight of about 40 to 60 g may be used.
- Aramid fabric according to an embodiment of the present invention has a static air permeability according to the American Society for Testing and Materials Standard ASTM D 737 method, when the ⁇ is 125 pa based on the uncoated fabric layer, about 5.0 cfm or less, or about 0.3 To about 5.0 cfin, or about 4.0 cfm or less, or about 0.3 to 4.0 cfm, or about 3.0 cfm or less, or about 0.3 to 3.0 cfin, about 14 cfin or less when ⁇ is 500 pa, or about 7 to 14 cfin, black may be about 10 cfin or less, or about 5 to 12 cfin.
- the static air permeability refers to the amount of air that permeates into the fabric (layer) when a certain pressure is applied to the fabric (layer) for the air bag, and the yarn has a small denier per filament and The higher the density, the lower the value.
- the air permeability of the arimid fabric can be further lowered by including a rubber coating layer in the fabric layer, and can secure an air permeability of approximately 0 cfin.
- the fabric of one embodiment has a static air permeability of about 0.1 cfin or less, or about 0 to 0.1 cfin when the ⁇ is 125 pa according to the ASTM D 737 method of the American Society for Testing and Materials.
- 0.05 cfin or less or about 0 to 0.05 cfin, and when ⁇ is 500 pa, about 0.3 cfin or less, or about 0 to 0.3 cfm, or about 0.1 cfin or less, black is about 0 to 0.1 cfin Can be.
- the aramid fabric according to an embodiment maintains the airtightness of the fabric for the air bag in the case of exceeding the upper limit of the static air permeability range, or exceeds the upper limit of the dynamic air permeability range, respectively for the fabric layer and the coated fabric It may not be desirable in terms of.
- the thickness of the aramid fabric layer can be measured in accordance with the American Society for Testing and Materials Standard ASTM D 1777, and has excellent mechanical properties and air barrier effect, and in terms of securing excellent storage and fdingability when the vehicle is mounted.
- the aramid fabric of one embodiment is about 1.5 kgf, or about 0.7 to 1.5 kgf, black is about 1.45 kgf or less, black is about 0.75 kgf to 1.45 kgf, or according to the American Material Testing Association standard ASTM D 4032 method About 1.4 kgf or less, or about 0.8 kgf to L4 kgf.
- the stiffness of the fabric exceeds about 1.5 kgf, the foldability of the fabric may be so low that the folding property of the airbag cushion may be significantly reduced.
- the fabric's stiffness is too low, it may not be able to provide a sufficient protection support function when the airbag is inflated and deployed, and thus the stiffness of the fabric may be low because the shape retention performance may be degraded even when the vehicle is mounted. It can be more than 0.7 kgf.
- the airtightness in the aramid fabric is required to minimize the elongation due to the tensile force due to high pressure air, etc.
- the energy absorption performance is maximized at the discharge of gas at high temperature and high pressure in order to secure the mechanical properties during air bag operation. It is very important to be.
- the fabric may further improve the airtightness and energy absorption performance when the airbag is deployed by weaving the cover factor of the fabric layer to be optimized to about 1,500 to 2,200, or about 1,550 to 2,150 according to Formula 3 below.
- the inclined fineness and weft fineness used in the aramid fabric layer and the fabric may be about 300 to 1000 denier or about 400 to 900 denier, respectively.
- the fineness of the warp and the weft may be different from each other, it is appropriate to be the same for more uniform physical properties.
- Slant fineness and in the aramid fabric Weft fineness may be selected in the range as described above in terms of optimizing the elongation index of the fabric to secure excellent ductility characteristics with excellent mechanical properties.
- the denier is a unit representing the thickness of the yarn or fiber,
- the aramid fabric of one embodiment can secure excellent mechanical properties and heat resistance, including aramid yarns, such aramid yarns may have a molecular structure in which a phenyl ring is connected to all the main chain except the amide group.
- the aramid has a meta-type (m-) and para-type (P-) according to the connection state of the phenyl ring, in order to express the superior physical properties of the aramid fabric of one embodiment may be used more appropriately para-type.
- the phenyl rings are laminated in a plate shape with each other so that the crystallinity is very high, heat resistance, low shrinkage, high strength, high elasticity and excellent mechanical properties of the fabric of one embodiment And a yarn material included therein.
- the warp density and the weft density of the fabric layer included in the aramid fabric that is, the weaving density in the warp direction and the weft direction, respectively is about 25 to 55 th / inch, or about 25 to 47 th / inch, black is about It may be 26 to 45 th / inch.
- the inclination density and the weft density of the aramid fabric layer may be about 25 th / inch or more in terms of securing the excellent mechanical properties of the airbag fabric, respectively, in terms of improving the folding properties of the fabric and lowering the tear strength, etc. It can be less than 55 th / inch.
- the aramid fabric described above can be manufactured through weaving while adjusting the yarn fineness, density and cover layer of the aramid yarn in the above-described range to obtain the aramid fabric layer, and then refining, heat-setting and rubber coating process. .
- the aramid fabric of one embodiment having the above-described excellent physical properties may be manufactured and provided.
- the aramid fabric of one embodiment may be manufactured through a beaming, weaving, refining, heat setting process and rubber coating process using aramid yarn as weft and warp yarn.
- the fabric is conventional It can manufacture using a weaving machine, and is not limited to using any specific loom.
- the plain weave fabric may be manufactured using a rapier loom, an air jet loom or a water jet loom.
- the coating process of the polyurethane-based rubber or silicone-based rubber can also optimize the workability of the sewing operation, which is a post-process for forming an air bag using a fabric.
- the coating process conditions such as the type or coating amount of the rubber component
- cracking of the yarn filament may occur during the sewing operation may significantly reduce the workability.
- the sewing workability can be made more excellent, and as a result, the aramid fabric having excellent sewing workability can be provided while optimizing physical properties such as air barrier property, heat resistance and friction resistance. have.
- the fabric of the embodiment in which the above-described rubber coating layer is formed may be manufactured to a certain type of airbag cushion through a conventional cutting and sewing process.
- the airbag cushion is not limited to a particular form and can be manufactured in a general form, for example, a woven form of plain weave type is preferable.
- a vehicle airbag comprising the aramid fabric described above.
- an airbag system including the above airbag is provided, and the airbag system may be provided with a conventional apparatus well known to those skilled in the art.
- the vehicle airbag may be, for example, a vehicle exterior airbag of a pedestrian airbag or a bumper airbag.
- pedestrian airbags serve to complete the stratification on pedestrians that are deployed in the hood of the vehicle and hit the windshield
- bumper airbags are deployed to be mounted under the vehicle lights and applied to the stratification applied to pedestrians or structures or to the vehicle itself. It is to play a role to stratum the strata.
- the aramid fabric described above can be effectively used for bumper air bags and the like mounted on the vehicle bumper by simultaneously securing high mechanical properties and excellent flexibility.
- FIG. Degree the bumper airbag device 201 includes an airbag 203 housed in a contracted state in a front bumper 202 of the vehicle 200, and an inflator connected to the airbag 203.
- the airbag device 201 is operated when the inflator 204 generates a high temperature and high pressure gas, so that the air bag 203 to which the high temperature and high pressure gas is supplied to the front of the front bumper 202 Developed. Thereby, the strata and pedestrian shocks from the vehicle stratifying the front bumper 202 can be alleviated.
- the airbag device including the aramid fabric of the present invention has been accommodated in the front bumper, it can also be used in the form attached to the side of the vehicle, the rear bumper, etc., if necessary.
- an airbag fabric and a vehicle airbag including the same having excellent flexibility and folding properties with excellent mechanical properties.
- This aramid fabric can not only achieve excellent mechanical properties, form stability, and air barrier effect, but also excellent folding and flexibility, which significantly improves storage performance while mounting a car and at the same time, impacts on vehicles and passengers. Minimized to protect passengers.
- the aramid fabric according to the present invention can absorb and complete a very high level of impact force, the aramid fabric can be very preferably used for exterior airbags mounted on the outside of the vehicle to minimize the impact on passengers and vehicles. [Brief Description of Drawings]
- FIG. 1 is a photograph showing an apparatus for measuring heat resistance according to an embodiment of the present invention.
- FIG. 2 is a view schematically showing the structure of a vehicle equipped with a vehicle exterior airbag (bumper airbag) that is mounted outside the vehicle.
- vehicle exterior airbag bumper airbag
- the fabric dough for airbags was woven through a rapier loom using aramid yarns.
- the fabric dough was subjected to two consecutive refining and heat treatment processes to prepare an airbag fabric.
- the non-coating fabric thus prepared is directly coated with a silicone coating agent based on liquid silicone rubber (LSR) resin and coated with a knife over roll coating method. It was used as a textile fabric for airbag cushion.
- the fabric was cut using a laser cutting machine, and sewing the fabric under sewing conditions as shown in Table 1 below to prepare an airbag cushion.
- the yarn type and woven form of the fabric for the airbag, the coating component and coating amount, the type of sewing thread and the sewing method is as shown in Table 1 below.
- the cover factor (CF) of the fabric is a value calculated according to the following equation (4). The rest of the conditions were in accordance with conventional conditions for the manufacture of airbag cushions.
- the airbag cushions prepared according to Examples 1 to 9 were measured for various physical properties by the following methods, and the measured physical properties are summarized in Table 2 below.
- the specimen of the aramid fabric is cut, fixed to the lower clamp of the tensile strength measuring device according to the International Organization for Standardization ISO 13934-1 method, and the tensile strength and elongation at break of the airbag fabric specimen while moving the upper clamp upward.
- the tensile strength and elongation at break of the airbag fabric specimen while moving the upper clamp upward.
- T wa is the inclination tensile strength (N / 5cm) of aramid fabric measured by ISO 13934-1 method
- S wa is the tensile tensile elongation (%) of aramid fabric measured by the International Organization for Standardization ISO 13934-1.
- D is the fineness of the aramid yarn (de).
- weft direction elongation index of the fabric as shown in the following formula 2, using the weft yarn direction tensile strength (T we ) and tensile elongation (S we ) and yarn fineness (D) of the fabric measured as described above (TI we ) was estimated.
- T we is the weft direction tensile strength (N / 5cm) of aramid fabric measured by the International Organization for Standardization ISO 13934-1 method
- D is the fineness of the aramid yarn (de).
- the specimen was mounted on a hot rod tester device as shown in FIG. 1. It was.
- the hot-rod steel material, diameter 10 mm, length 82 mm, weight 50 g, thermal conductivity 55 W / m.K
- the hot-rod was heated at a temperature rising rate of 20 ° C / min to 450 ° C and 600 °, respectively.
- T temperature
- the distance (d) from the specimen was placed in the upward direction of the specimen so as to be about 76 mm away, at which point the hot rod was dropped freely towards the specimen.
- each thickness (D) was measured according to the American Society for Testing and Materials, ASTMD 1777.
- the ductility of the fabric was measured by the circular bend method using a ductility measuring device according to the American Material Testing Association standard ASTM D 4032.
- ASTM D 4032 American Material Testing Association standard ASTM D 4032.
- the cantilever method may be applied as a method of measuring the stiffness, and the stiffness can be measured by measuring the bend length of the fabric using a cantilever measuring device, which is a test bench that is inclined at an angle to give a bend to the fabric.
- the fabric of Examples 1 to 9 fabricated in the optimum range of the elongation index using aramid yarn has a good stiffness of 1.0 1.41 kgf can be folded compactly even in bumper type, etc. It was confirmed that the.
- the aramid fabric layer included in the fabric of Examples 1 to 9 has a heat resistance constant of 227 312, and exhibits excellent mechanical properties, thereby having no problem in absorbing a high level of layer force from the outside of the vehicle to express its performance. It was confirmed that there is no.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014548677A JP5952424B2 (ja) | 2011-12-21 | 2012-12-21 | 車両用エアバッグ用アラミド反物およびこれを含む車両用エアバッグ |
US14/367,344 US20150218735A1 (en) | 2011-12-21 | 2012-12-21 | Aramid fabric and airbag for vehicle including same |
EP12858851.4A EP2796600B8 (en) | 2011-12-21 | 2012-12-21 | Airbag for vehicle including an aramid fabric |
CN201280064153.1A CN104066877B (zh) | 2011-12-21 | 2012-12-21 | 芳族聚酰胺织物和包含它的机动车用气囊 |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
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KR20110139483 | 2011-12-21 | ||
KR10-2011-0139483 | 2011-12-21 | ||
KR10-2011-0139484 | 2011-12-21 | ||
KR20110139484 | 2011-12-21 | ||
KR1020120150375A KR101535497B1 (ko) | 2011-12-21 | 2012-12-21 | 아라미드 원단 및 이를 포함하는 차량용 에어백 |
KR10-2012-0150375 | 2012-12-21 |
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WO2013095054A1 true WO2013095054A1 (ko) | 2013-06-27 |
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ID=48986948
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PCT/KR2012/011287 WO2013095054A1 (ko) | 2011-12-21 | 2012-12-21 | 아라미드 원단 및 이를 포함하는 차량용 에어백 |
Country Status (6)
Country | Link |
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US (1) | US20150218735A1 (ko) |
EP (1) | EP2796600B8 (ko) |
JP (1) | JP5952424B2 (ko) |
KR (1) | KR101535497B1 (ko) |
CN (1) | CN104066877B (ko) |
WO (1) | WO2013095054A1 (ko) |
Families Citing this family (1)
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WO2015199444A1 (ko) | 2014-06-24 | 2015-12-30 | 코오롱인더스트리 주식회사 | 에어백용 폴리에스테르 원단의 제조방법 |
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2012
- 2012-12-21 EP EP12858851.4A patent/EP2796600B8/en active Active
- 2012-12-21 CN CN201280064153.1A patent/CN104066877B/zh active Active
- 2012-12-21 KR KR1020120150375A patent/KR101535497B1/ko active IP Right Grant
- 2012-12-21 WO PCT/KR2012/011287 patent/WO2013095054A1/ko active Application Filing
- 2012-12-21 US US14/367,344 patent/US20150218735A1/en not_active Abandoned
- 2012-12-21 JP JP2014548677A patent/JP5952424B2/ja active Active
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Also Published As
Publication number | Publication date |
---|---|
CN104066877A (zh) | 2014-09-24 |
EP2796600A1 (en) | 2014-10-29 |
EP2796600B1 (en) | 2019-05-22 |
US20150218735A1 (en) | 2015-08-06 |
CN104066877B (zh) | 2015-07-01 |
EP2796600A4 (en) | 2015-12-09 |
EP2796600B8 (en) | 2019-07-10 |
JP5952424B2 (ja) | 2016-07-13 |
JP2015508458A (ja) | 2015-03-19 |
KR20130072171A (ko) | 2013-07-01 |
KR101535497B1 (ko) | 2015-07-10 |
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