WO2002061200A1 - Etoffe et sac gonflable a revetement de silicone - Google Patents
Etoffe et sac gonflable a revetement de silicone Download PDFInfo
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- WO2002061200A1 WO2002061200A1 PCT/JP2001/008834 JP0108834W WO02061200A1 WO 2002061200 A1 WO2002061200 A1 WO 2002061200A1 JP 0108834 W JP0108834 W JP 0108834W WO 02061200 A1 WO02061200 A1 WO 02061200A1
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- silicone
- fabric
- coating
- woven
- yarn
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Classifications
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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
- B60R21/23—Inflatable members
- B60R21/235—Inflatable members characterised by their material
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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
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/643—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicon in the main chain
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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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- 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
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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
- D06N3/12—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 otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
- D06N3/128—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 otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with silicon polymers
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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
- 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
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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
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1303—Paper containing [e.g., paperboard, cardboard, fiberboard, etc.]
- Y10T428/1307—Bag or tubular film [e.g., pouch, flexible food casing, envelope, etc.]
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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
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/131—Glass, ceramic, or sintered, fused, fired, or calcined metal oxide or metal carbide containing [e.g., porcelain, brick, cement, etc.]
- Y10T428/1314—Contains fabric, fiber particle, or filament made of glass, ceramic, or sintered, fused, fired, or calcined metal oxide, or metal carbide or other inorganic compound [e.g., fiber glass, mineral fiber, sand, etc.]
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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
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/131—Glass, ceramic, or sintered, fused, fired, or calcined metal oxide or metal carbide containing [e.g., porcelain, brick, cement, etc.]
- Y10T428/1317—Multilayer [continuous layer]
- Y10T428/1321—Polymer or resin containing [i.e., natural or synthetic]
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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
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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
- Y10T442/2139—Coating or impregnation specified as porous or permeable to a specific substance [e.g., water vapor, air, etc.]
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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
- Y10T442/2762—Coated or impregnated natural fiber fabric [e.g., cotton, wool, silk, linen, etc.]
- Y10T442/277—Coated or impregnated cellulosic fiber fabric
- Y10T442/2803—Polymeric coating or impregnation from a silane or siloxane not specified as lubricant or water repellent
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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.]
- Y10T442/30—Woven fabric [i.e., woven strand or strip material]
- Y10T442/3179—Woven fabric is characterized by a particular or differential weave other than fabric in which the strand denier or warp/weft pick count is specified
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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.]
- Y10T442/30—Woven fabric [i.e., woven strand or strip material]
- Y10T442/3179—Woven fabric is characterized by a particular or differential weave other than fabric in which the strand denier or warp/weft pick count is specified
- Y10T442/322—Warp differs from weft
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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.]
- Y10T442/30—Woven fabric [i.e., woven strand or strip material]
- Y10T442/3179—Woven fabric is characterized by a particular or differential weave other than fabric in which the strand denier or warp/weft pick count is specified
- Y10T442/3301—Coated, impregnated, or autogenous bonded
Definitions
- the present invention relates to a soft and light silicone-coated fabric excellent in combustion resistance and mechanical properties, a method for producing the same, and an air-pack made of the fabric.
- airbags installed to ensure the safety of occupants are usually in the form of a module that incorporates and stores both the inflator and airbag. It is mounted in a narrow place such as a front panel.
- passenger cars have been equipped with airbags in the form of sidepacks and side curtains in order to respond to collisions from the side of the vehicle. It is stored in a narrow place such as Under these circumstances, it has become necessary to reduce the airbag storage volume as much as possible and to further reduce the weight of airbag equipment in order to secure a large space inside the car without compressing it.
- it has become necessary to reduce the airbag storage volume as much as possible and to further reduce the weight of airbag equipment in order to secure a large space inside the car without compressing it.
- the flame retardancy is passed by adding a solid powder such as acetylene black or Fe 2 O 3 to silicone and applying it. It is described to produce a coated fabric.
- the disclosed coating film is not a lightweight coating fabric because it has a coating film having a thickness of 5 to 20 ⁇ .
- the tension balance between the upper thread and the lower thread breaks down, and the seam is peeled off, causing the thickness of the airbag product to fluctuate and the thread running tension to fluctuate.
- the sewing thread may be damaged or the sewing thread may be broken, causing a problem that the reliability of the deployment performance of the airbag may be impaired.
- Japanese Unexamined Patent Publication No. 2001-1383884 discloses that a surface of a woven fabric composed of 100-250 d fine yarn capable of preventing gas leakage has a surface of 5-35 g / m 2 of silica.
- a lightweight and storable coating fabric with a corn rubber coating is described. However, it does not disclose the design of a coating fabric that sufficiently suppresses the burning rate with a lightweight silicone coating or that has sufficient mechanical properties to guarantee the deployment pressure of an air bag as a lightweight woven fabric. .
- the first layer is a silicone with a high elongation at break due to the molecular chain extender hydridone silicone and the reinforcing filler fume silica
- the second layer is a high tear strength silicone that is crosslinked with a tri- or more functional silicone. And has a pressure holding function at a coating amount of 60 to 220 g / m 2 . However, it does not describe the design of a coated fabric that can hold the pressure while reducing the weight of the airbag.
- FIG. 1 (A) is a diagram for explaining how to fold the airbag in the method for evaluating the compactness of the airbag.
- Fig. 1 (B) is an explanatory view of an intermediate state of folding the airbag.
- Fig. 2 is an explanatory view of a method of measuring the thickness of the folded airbag.
- Figure 3 shows a cross-sectional electron microscope (SEM) photograph and a cross-sectional view of the overlapping portion of the yarn in the base fabric of the silicone-coated fabric of Comparative Example 74.
- SEM cross-sectional electron microscope
- FIG. 4 is a photograph showing a cross-sectional electron microscope (SEM) image of the overlapping portion of the yarn in the base fabric of Example 7 3 silicone-coated fabric and a chart showing the distribution of XMA element (Si) in the cross-sectional portion. .
- FIG. 5 is an electron micrograph (SEM) showing a perspective view of the cross section and surface shape of the coating film surface of the silicone-coated fabric of Example 73. Disclosure of the invention
- An object of the present invention is to provide a silicone-coated fabric having excellent lightness, flexibility, and compactness, and having flame resistance capable of passing an FMVSSS302 combustion test.
- a more specific object of the present invention is to have mechanical properties that can withstand the deployment pressure when the airbag is deployed, suppress bag breakage due to burn-through holes when the airbag is deployed, and reduce the deployment time. It is an object of the present invention to provide a silicone-coated fabric suitable for producing an air bag with reduced harm to passengers.
- the inventors of the present invention have proposed a light weight coating with a small amount of coating by providing a silicone coating having a specific coating film structure on a soft dense woven fabric base cloth made of woven yarn having a total fineness of not more than 270 dtex.
- a silicone-coated fabric that has a high level of combustion suppression properties (FMV SS302 combustion test pass) and can be used to obtain a lightweight bag with reduced bag breakage due to burn-through holes.
- This silicone-coated fabric is a light-weight coated fabric that requires a small amount of silicone coating, and particularly has the flexibility and the improved flexibility of the fabric.
- the present invention comprises a synthetic fiber woven yarn having a total fineness of 100 to 270 dtex, and the woven fineness represented by the product of the total fineness of the woven yarn and the woven fabric density (book / 2.54 cm) has a warp direction.
- a base fabric that is 100,000 to 25,000 (dtex * book / 2.54 cm) in each of the weft directions, and the fabric has a silicone of 5 to 25 g / m 2.
- serial Konkoti ring fabric is the maximum burning rate 7 0 ⁇ 1 5 0 kW / m 2 in radiation burning test using a cone force opening Lee meter of the fabric It is.
- the silicone-coated fabric of the present invention is made of synthetic fiber woven yarn having a total fineness of 100 to 270 dte X, and is a woven fineness expressed by a product of the total fineness and the woven fabric density (this Z 2.54 cm). Is 10, 000 to 25, 000 (dtex * book / 2.54 cm) in both the warp and weft directions, as shown in (1) and (2) below.
- the method of manufacturing silicon Konkoti ring fabric characterized by 5 ⁇ 2 5 g Zm 2 coating crosslinking handle more silicon cone to a combination of species of the coating,
- a coating fabric as a bag-making material is used for lightweight airbags. Is required to be light in weight per unit area.
- the total fineness of each of the warp and the weft constituting the base fabric of the coating fabric of the present invention is 100 to 270 dtex, preferably 110 to 25 odtex.
- the total fineness is a value obtained by summing the finenesses of all the filaments of each of the woven yarns constituting the woven fabric, that is, the warp (and the weft) (the same as the fineness of the yarn).
- the yarn constituting the warp or the weft may be a fuel yarn, a combined yarn, or a aligned yarn of a plurality of yarns.
- the base fabric is a fabric woven with a yarn having a total fineness of less than or equal to 270 dtex in this sense.
- the base fabric according to the present invention is further characterized in that in each of the warp direction and the weft direction, the weave fineness represented by the product of the total fineness of the yarns constituting the fabric and the fabric density (book / 2.54 cm) Is 10, 00 00 to 25, 00 0 (dte ⁇ ⁇ book 2.54 cm), preferably 12, 00 0 to 20, 0 0 0 ((1 1: 6 'book / 2.54 cm), and more preferably 13,000 to 19,000 (dte X ⁇ book / 2.54 cm). Is a lightweight cloth made of high-density woven fabric.
- the amount of the silicone applied when the amount of the silicone applied is reduced, the amount of the silicone, which is a combustion suppressant, is reduced with respect to the combustible synthetic fiber. There is a tendency to be unstable.
- the amount of silicone applied to the base fabric is 5 to 25 g / m, more preferably 7 to 18 g / m 2 .
- the maximum burning rate 7 0 ⁇ 1 5 0 kW / m 2 in radiant combustion test using Konkaro Rimeta one is good Ri preferably of 1 0 0 ⁇ 1 3 0 k W / m 2 Indicates the maximum burning rate .
- the lower the maximum burning rate the better the ability to pass horizontal burning assessments such as the FMVSS 302 burning assessment, where hot particles derived from inflator powder residue melt the silicone fabric. Even so, the expansion of the combustion of the fabric is suppressed.
- a hole in the punch bag is formed, and the air bag bag starting from the hole is not developed.
- a base fabric made of finely woven yarn is used to obtain a lightweight airbag.
- the heat capacity per unit area of the fabric decreases.
- Hot particulates were usually observed as ash that stuck to the inside of the airbag after deployment to melt the synthetic fibers, and occasionally melt-through holes (burn-through) occurred during deployment of the airbag.
- the basis weight of the fabric is further reduced, the size of the through-hole tends to increase, and traces of the through-hole are observed at the broken portion of the airbag, which may be the starting point of the bag break.
- Silicone on the other hand, does not melt, but burns at high temperatures, and similarly, in conventional airbags made of lightweight silicone coating fabric, burn-through is formed and becomes the starting point of bag breakage. In some cases.
- the silicone coating film having a low radiant burning rate suppresses penetration of a single hole in the pores, resulting in bag breakage.
- the cone calorimeter method (ADTME1354, ISO5660) is a radiant combustion method using a cone heater, and is used for evaluating the flame retardancy of resin molded products. This method is suitable for evaluating the combustion behavior with good reproducibility by keeping the combustion conditions of the sample constant by radiant heat using a cone heater.
- the burn rate measurement test method using the cone calorimeter method will be described later, but in the present invention, the cloth test method is used. By placing a specific wire mesh on the material, the warpage due to thermal deformation was suppressed, the combustion heat generation behavior was measured, and the maximum combustion rate was determined.
- the silicone-coated fabric of the present invention can: a) extinguish a fire within a combustion time of 60 seconds or less and a combustion distance of 50 mm or less; The combustion speed at the point of 254 mm) is within 80 mmZ minutes.
- the combustion time is within 60 seconds, and the self-extinguishing judgment is made.
- b) is the case beyond the range of a), and in any of the evaluation samples, the force at which the burning speed calculated from the burning time is within 80 mmZ minutes at the burning distance where the fire extinguished, or However, the burning speed calculated from the time when the fuel burned to the point of 254 mm from the measurement start point is within 80 mm / min, which is the judgment of the delayed flammability.
- the suppression of the burning rate reduces the size of the combustion flame, stabilizes the combustion suppression effect, and suppresses the burning rate even in the horizontal combustion evaluation.Repeated sample evaluation in the FMV SS302 combustion test However, stable evaluation of self-extinguishing or high-level retardance can be obtained.
- the airpack is required to withstand the gas pressure during deployment and the increase in internal pressure during occupant restraint.
- it is necessary to have specific mechanical properties.
- the silicone-coated fabric of the present invention has a tear strength (single tongue method) weaving yarn strength ratio of 8 to 15, more preferably 9 to 13. This ratio is the number of bundles that resist the tearing force by converging the yarn in the tear generation region (del) at the tear tip, that is, the tear convergence rate. If the tear convergence rate is 8 or more, the yarn convergence process absorbs the energy mildly in areas where the tear load is steep during deployment, such as bolt holes where the airbag is fixed to the module. Therefore, it does not lead to damage.
- the silicone coated fabric of the present invention which can suppress the heat burst of the present invention, has a biaxial tensile strength at break of 4,000 to 8,000 NZ20 cm, more preferably 4,500 to 7,0,0. 0 0 NZ 20 cm. If the breaking strength of the biaxial tensile test is more than 4,000 N / 20 cm, the airbag base fabric will not be damaged. The higher the biaxial tensile breaking strength, the higher the deployment pressure resistance.However, in a lightweight airbag, it depends on the total fineness and density of the yarn. There is a limit to come.
- the biaxial tensile test a tensile rupture test was performed by grasping the warp direction and the weft direction of the coated cloth and simultaneously extending in both directions.
- the airbag When the airbag deploys and restrains the occupant, the airbag must withstand the deployment pressure as a pressure vessel. In this case, the stress on the coated cloth is generated as biaxial stress.
- the uniaxial tension test has a degree of freedom in the orthogonal direction and shrinkage elements are mixed, while the biaxial tension test shows the actual mechanical properties for airbag deployment.
- the silicone-coated fabric of the present invention has a particular silicone distribution in the cross-section of the fabric.
- the Si element distribution by SEM / XMA showed the maximum peak and 1% of the peak count at the 50% center of the overlap where the warp and weft overlap at the front and back of the fabric. / 20 to 2 Z 3 count peaks.
- the silicone applied to the base fabric is thinly and evenly distributed among the single yarn fibers constituting the woven yarn of the woven fabric, and a part thereof is segregated and distributed on the surface of the woven fabric. Furthermore, on one side of the surface of the woven fabric, there is a silicone layer forming a coating layer.
- the silicon distribution structure shown in the Si elemental analysis characteristically appears at the places where the warp and weft yarns are woven on the front and back in the cross section of the woven fabric. You. In the present invention, it is necessary for the base fabric to have such a structure that the Si distribution is at the center of the overlap of the woven yarns by the warp and the weft.
- the Si distribution is analyzed by preparing a cross-section sample of the coated fabric passing through the center of overlap where the warp and weft are woven on the front and back, and performing Si element analysis by SEM / XMA. Observe the weaving composition of each weaving unit and analyze the distribution from the center of the weaving yarn to 50% of the repeating unit length.
- the maximum force peak is first observed in the portion corresponding to the silicon film.
- there is a slight distribution of Si between the fibers and the peak of segregated silicon on the surface of the fabric can be observed on the surface of the fabric without the silicone film, that is, on the back of the film. Multiple segregation peaks, including those in the middle, are observed.
- the peak height of the segregated silicon to make the Si element distribution maximum peak height of the silicon film part is 1/20 to 2 Z3, preferably 1/10 to 1/2. is there. If the peak height ratio is less than 1/20, the silicone other than the coated silicone makes only a small contribution to combustion suppression, and the burn-through generation of the synthetic yarn cannot be prevented from expanding. On the other hand, at 2Z3 or more, the silicone coating is formed on both sides of the fabric, and the weight of the coating becomes heavy, or even if it is light, the silicone coating becomes non-uniform, the combustion suppression behavior becomes unstable, and the high pressure The non-breathability underneath cannot be secured.
- the airpag deploys quickly and restrains the occupant in the event of a collision, and it is required that the deployment be completed in a short time and the occupant restraint prepared.
- Lightweight airbags are exhibited in the sense that the energy to move the center of gravity is small. It has the potential to shorten the open time. In order to take advantage of this advantage, it is desirable to reduce the resistance when the fabrics forming the bag are rubbed against each other and spread from the small folded state when unfolded.
- the silicone-coated fabric of the present invention has a friction coefficient (M I U) in the warp and weft directions in KES measurement of 0.05 to 0.3 on both the front and back surfaces of the coated fabric.
- MIU coefficient of friction
- ⁇ S Judgment fe (Kawabata's evaluation system for fabric) is a ⁇ feeling '' of the fabric, that is, the conversion of the basic mechanical characteristics of the fabric to the numerical value of the tactile sensation felt by the human body by physical characteristics. Bun ⁇ as a measurement method, ⁇ 'ne standardization and Analysis of Hand Evaluation , 2 nd ed., S. Kawabata, the Textile Machinery Society of Japan, defines a measurement method in July 1980).
- the KES measurement method for evaluating the friction property of the cloth surface is a sample that is horizontally held on a table with a constant tension using a friction element described in the above-mentioned document.
- the coefficient of friction MIU
- the state of surface slippage of the coated fabric of the present invention can be evaluated.
- the measurement was performed by attaching the coated fabric sample to the surface of the KES designated friction element, but the measurement conditions will be described later in detail.
- silicone coated fabrics if the coefficient of friction is within the above range, the keratin damage of the human body is improved, and when the human body touches the air bag bag during deployment and expansion, or the human body enters the deployed air bag. Even if such a situation occurs, the risk of harm to the occupant such as abrasion by the airbag can be reduced.
- the silicone-coated fabric of the present invention has an air permeability at a pressure of 300 kPa of 1.0 cm 3 cm 2 / sec or less, preferably 0.1 cm 3 Z cm 2 / sec or less.
- the deployment gas pressure of the airbag instantaneously reaches a level exceeding 200 kPa.
- the silicone-coated fabric of the present invention can maintain the non-breathability even under such a high pressure, so that the airbag can be deployed at a high speed by sufficiently utilizing the energy generated by the inflator gas.
- the airbag is kept non-breathable, and then maintains the pressure of the airbag even after holding at 50 kPa for 10 seconds. Since the air bag can be held in an expanded state, it can also be effective in protecting occupants in the event of vehicle rollover.
- the fineness of the single yarn constituting the base yarn constituting the base fabric is 0.5 to 4.5 dtex, preferably 1.0 to 3.5 dtex.
- the bending stiffness of the coating cloth is reduced, and a compact folded airbag can be obtained.
- the hysteresis of bending of the coated fabric is small and it is difficult to bend, so the airbag expands and shrinks from a compact folded state, contributing to shortening the deployment time .
- a thin single yarn is inserted into the hole
- the front and back sides of the portion to be formed are covered and the fabric surface is relatively smooth, and it is possible to prepare a lightweight and uniformly coated fabric.
- the coating surface with smooth and fine irregularities has low frictional resistance and contributes to shortening the development time.
- the uniform film morphology of the silicone improves film cracking during combustion and suppresses combustion.
- the coating film is relatively evenly and microscopically formed on the surface layer of the thin single yarn group on the woven fabric without macroscopic unevenness such as holes, the deformation of the fabric under high pressure is reduced. In this case, the film is not broken down microscopically, which contributes to suppressing gas leakage.
- the silicon permeated between the fine fibers increases the effect of suppressing combustion, and the effect of suppressing the expansion of burn-through.
- the synthetic fibers constituting the base fabric of the silicone-coated fabric are not particularly limited, but polyhexamethylene adipamide @ polytetramethylene adipamide having a high melting point and a high heat capacity is preferable. Further, fibers mainly composed of polyhexamethylene adipamide are also preferably used. Among them, polyhexamethylene adipamide (hereinafter simply referred to as Nylon 66) fibers having a melting point of 21.5 ° C or more, Nylon 66 copolymers (Nylon 66/6, Nylon 6) 6/61, Nylon 66 Z610) fiber and Nylon 66 fiber blended with Nylon-based polymer (Nylon 6, Nylon 6100 etc.) are not heat-resistant.
- Nylon 66 polyhexamethylene adipamide
- these fibers may contain various additives that are usually used for improving productivity or characteristics in the production or processing steps of the raw yarn.
- additives for example, heat stabilizers, antioxidants, light stabilizers, leveling agents, antistatic agents, plasticizers, thickeners, pigments, flame retardants and the like can be included.
- the tensile strength of the fibers constituting the silicone-coated fabric of the present invention is , 5.7 cN / dtex or more, more preferably 6.2 cN / dtex or more, particularly preferably 6.2-11 cN / dtex.
- the tensile strength is 5.7 c NZ dtex or more, the strength of the coated fabric can be secured in combination with the weave density of the fabric.
- the base fabric used in the silicone-coated fabric of the present invention may be, for example, a fabric having a structure such as plain weave, lattice weave, or weft weave, and may be an existing air jet loom, water jet loom, levia loom, Weaving can be performed using a weaving machine or the like, and there is no particular limitation on the weaving method.
- the silicone-coated fabric of the present invention is obtained by applying the following coating processes (1) and (2) to a predetermined base fabric, so that the total applied amount to the base fabric is 5 to 25 gZm. by applying a second silicon cone is prepared by crosslinking the coated silicon co over emissions.
- the silicone coating of the present invention is formed by two types of coating films applied to the base fabric by separate coating steps, and each coating film has a different function.
- the coating step (1) is a coating provided with a relatively low-viscosity silicone dope (hereinafter referred to as “doping”), while the coating step (2) is based on a relatively high-molecular-weight silicone fabric.
- the coating step (1) which is a coating applied to one side of the base fabric to form a coating layer applied to the surface of the base fabric (hereinafter referred to as a coating)
- the dope has a solution viscosity of preferably 0.1. It is a diluent of low viscosity silicone with l ⁇ 5 Pa ⁇ s (the same applies at 25 ° C).
- the composition of the silicone composition used for doping is mainly an addition-bridge type silicone.
- an organopolysiloxane having an alkenyl group (including a vinyl group) at a molecular chain terminal and (b) an organopolysiloxane having at least three hydrogen atoms bonded to Si, that is, Si_H functional groups.
- the viscosity (a) of the base silicone is preferably 0.1 to: L0Pas.
- Elastomers vulcanized or crosslinked using low viscosity silicones have a low molecular weight between crosslinks and consequently a high crosslink density. Silicone with a high cross-linking density reduces the burning rate of the silicone elastomer itself by half, and in the combustion of the silicone-coated fabric, the combustion flame becomes smaller, thereby providing a slow burning effect.
- the elastomer properties of the silicone composition were determined by vacuum defoaming the composition without dilution, without dilution, and by hot press molding and crosslinking (at 170 ° C for 5 minutes) to create a tensile test specimen. It can measure the physical properties of the elastomer of film formation (JISK-6251).
- the elastomer physical properties of the silicone composition used for doping are preferably 0.5 to 4 N / mm 2 in tensile strength and 20 to 200% in tensile elongation at break.
- the low-viscosity silicone can be used as a dope without being diluted.
- the dope is usually a diluent of a low viscosity silicone organic solvent or an aqueous emulsion of low viscosity silicone. 7i series emulsions
- the form concentration can be 1 to 60 t%.
- the application method can be appropriately selected from dip coating, knife coating, fountain coating, roll coating, and the like, and preferably, a method in which the silicone penetrates into the base fabric structure by dip coating or the like. preferable.
- the viscosity of the dope may be appropriately adjusted by the coating method within the above viscosity range.
- the silicon is distributed evenly in the fabric structure of the base fabric, and the silicon is partially segregated on the surface of the base fabric by the drying process of water or a solvent.
- the silicone dope is applied so that the low-molecular-weight silicone is well penetrated and distributed up to the single yarn of the synthetic fiber constituting the base fabric, and the dope is sufficiently formed by dip coating etc. It is preferably provided so as to penetrate between the fibers.
- the combustion speed is suppressed by the silicone being distributed and applied in contact with substantially all of the synthetic fibers constituting the base fabric.
- the action of the silicone is present even slightly on the surface of the base fabric, the damage to the skin can be significantly reduced. Therefore, the skin damage is also reduced on the surface of the base fabric by doping.
- the coating amount of silicon cone composition used in the dope grant is 1 ⁇ 2 1 g / m 2 in solids, preferably 3 ⁇ 1 5 g / m 2. In this range, the light weight and flame retardancy of the coating cloth are satisfied after the two types of application.
- the coating in the coating step (2) is applied to one side of the base fabric and forms a coating film surface of uniform thickness with unevenness of the ridges of the fibers due to the woven yarn on the surface of the base fabric. It is a process.
- This coating film coating layer has a function of shortening the combustion distance by suppressing the combustion gas from blowing out by forming a strong ash film during the combustion of the silicone and suppressing the combustion. Coating with only doping Although the radiating combustion rate of the lining fabric is relatively high, the radiant combustion rate is slowed down by the combination with the coating film, and the horizontal burning distance is also short. In addition, the uneven shape of the film eliminates the tackiness of the silicone, improves the frictional behavior and shortens the deployment time of the air bag.
- the liquid silicone composition applied in the application step (2) has a viscosity of 5 to 1, OOOPas, preferably 10 to 500 Pas. It is desirable that the liquid silicone composition be applied by a solventless method without being diluted with an organic solvent. In the liquid silicone having the viscosity in this range, the resin does not penetrate into the structure of the base fabric and is easily deposited on the surface. It is important that the resin does not penetrate into the structure of the base fabric and that the resin is present on the fabric surface as much as possible. Thus, the silicone-coated fabric can be modified into a FMV SS302 combustion test pass.
- the silicone coating film on one side is uniform and the minimum film thickness is sufficiently ensured, film formation such as film breakage from a thin portion of the resin during combustion and combustion gas blowing out is eliminated, and the combustion distance is reduced. It is possible to stably shorten it '.
- the viscosity of the liquid silicone composition is 1, OOOPa ⁇ s or less, the flow of the resin during the coating process is stable, and the adhesion to the doped silicone is good.
- the coating amount of the liquid silicone composition used for coating is 4 to 24 g Zm 2 , and preferably 5 to 15 g / m 2 in solid content. Within this range, the lightweight and flame-retardant properties of the silicone-coated fabric will be satisfied after two types of coating.
- the liquid silicone composition used for coating the film includes, for example, (A) an organopolysiloxane mainly having an alkenyl group (including a butyl group) at a molecular chain terminal, and (B) a hydrogen atom bonded to Si; Organopolysiloxanes with at least three S i _H functional groups in the molecule, (C) Promote the addition of S i-H functional groups to aliphatic multiple bonds It preferably contains a catalyst, (D) an appropriate organic silicon compound as an adhesion aid for the silicone resin and the synthetic fiber polymer, and (E) a reinforcing filler such as silica.
- A an organopolysiloxane mainly having an alkenyl group (including a butyl group) at a molecular chain terminal, and (B) a hydrogen atom bonded to Si; Organopolysiloxanes with at least three S i _H functional groups in the molecule, (C) Promote the addition of S
- the viscosity (A) of the base silicone is from 1 to 1,000 Pa ⁇ s, more preferably from 2 to LOOP a ⁇ s.
- the above-mentioned viscosity that is, the molecular weight is required.
- the toughness of the crosslinked film is enhanced by a silica filler or the like, and the coating liquid is reduced to 5 to 1000 Pas, preferably 10 to 500 Pas. ⁇ ⁇ ⁇ It is preferable that it is viscous.
- the elastomer properties of the silicone composition used for film coating were determined to be 2 to 10 N / mm 2 in tensile strength and 150 to 600 in tensile elongation at break according to the tensile test method for molded pieces described above. It is desirable to have% elastomer properties.
- a contact pressure type coating is used.
- Various general-purpose knife coats, roll coats, repar coats, etc. can be used.
- the coating method (gap method), in which a gap is provided between the woven fabric and the coating head, is not only difficult to control with a small amount of coating, but also because the coating surface, which has irregularities in the ridges of the fiber structure due to weaving, is difficult to control. I can't get it.
- the contact pressure condition in the knife coating is preferably 1 to 500 kgf / m, more preferably 20 to 300 kgf / m in linear pressure. The higher the linear pressure, the lighter the application. Further, it is possible to obtain a coated surface utilizing the unevenness of the ridges of the weaving configuration.
- the coating head (such as a knife edge) flattens the unevenness of the fabric at the moment of coating, the coating film is applied in a uniform thickness, and the unevenness of the fabric surface is recovered after the coating head passes. As a result, a coating surface that follows the uneven shape of the fabric surface is formed.
- the linear pressure condition is the viscosity of the coating dope, that is, the liquid silicon. It can be set as appropriate depending on the viscosity of the coating composition, the coating head shape, and the like.
- the portion where the coating head is in contact with the fabric is related to the substantial contact pressure.
- the thickness of the tip of a knife may be appropriately selected from about 4 mm to about 10 ⁇ m.
- the shape of the tip of the coating knife may be a semicircle, right angle, or concave shape. I just need.
- the coating speed is preferably from 1 to 100 m / min, and more preferably from 10 to 5 Om / min.
- the coated surface, which traces the uneven shape of the surface of the base fabric, does not have the tackiness of a normal silicone surface and has a film state with reduced frictional resistance. Therefore, it contributes to shortening the airbag deployment time.
- the crosslinking treatment may be performed according to the crosslinking system of the elastomer.
- a heat treatment of about 150 to 230 may be applied for about 0.1 to 5 minutes.
- any of the silicone compositions used in the present invention contains a coupling agent that improves the adhesiveness to synthetic fibers.
- a coupling agent that improves the adhesiveness to synthetic fibers.
- Si—HZ vinyl alkenyl
- any of the above-mentioned silicone compositions used in the present invention includes the present invention.
- Known thickeners, flame retardants, stabilizers and the like may be added as long as the effects of the invention are not impaired.
- the amount of the solid additive insoluble in the silicone composition, such as a pigment is preferably less than 5 wt%, more preferably less than 1 wt%, and most preferably, the pigment or the like. It is to be additive-free.
- part represents a wt part.
- An area (A) equivalent to 0.3 m square is collected from the silicone-coated fabric, weighed accurately, and dried at 105 ° C for 2 hours or more. Next, degrease with dichloromethan and dry. This was dissolved in 200 g of 90% formic acid at room temperature for 3 hours, and the insoluble matter was filtered off with a glass sintering filter (17 G_3) manufactured by Beadrex Co., Ltd. After washing with formic acid and water, dry and measure the dry mass of the insoluble matter at 105 ° C for 2 hours.
- the total coating weight (g Zm 2 ) was obtained by dividing the formic acid unnecessary (M) by the area (A) of the coated fabric sample.
- the silicone coated fabric was adjusted to standard conditions according to j ISL 0105 and sampled into a 94 x 94 mm rectangle.
- a 10 mm grid was knitted with a 0.25 ⁇ ⁇ -chromium wire on top of which the coating surface was coated. It was set with the wire mesh of m.
- a cone calorimeter III-C3 manufactured by Toyo Seiki Seisaku-sho, Ltd.
- ASTM E1354 and ISO5660 heating was performed with a cone heater in an air atmosphere.
- the cone heater was set to have a radiant heat of 50 kW / m 2 at a position 25 mm from the lower surface of the center of the heater.
- the maximum combustion rate was determined from the obtained combustion heat rate chart.
- a driver airbag 1 (60 liters) sewn based on the description of WO99 / 281664 is connected to the a-edge and the b-edge as shown in FIG. 1 (A). Fold in a bellows shape along the ⁇ , j8, and ⁇ / lines (equally spaced) along the center line of c_d so that the folds and valleys are formed at equal widths. (See Fig.
- the middle folded piece 20 is formed by folding the c-edge and the d-edge in a bellows shape so that the crease and d-valley are formed along the line ', ⁇ '
- a 50 mm square folding package 2 is prepared (see Fig. 2).
- the folded airbag 2 is placed on a flat base 4, a glass plate 3 of 300 mm square is placed thereon, and a load is applied with a weight 5 of 1 kg.
- the average thickness X (mm) after 30 minutes was measured.
- the deployment status is recorded on a high-speed VTR, and when viewed from the front, the distance from the center of the outer periphery reached at 50 msec in all circumferential directions, that is, the outer periphery is 98% of the deployed distance.
- the time when the distance has been reached is The time from the start of deployment to the completion of deployment was defined as the deployment time.
- the bag after deployment was observed, and if even one bag was found to be torn in the deployment test, it was judged to be a broken bag. If the bag broke, the location of the damage was checked. If the bag did not break, the presence of a hole in the panel was visually checked.
- the tensile strength of the silicone-coated fabric was measured in accordance with jIsL1096.8.1.2.1 (A-strip method).
- the measurement was performed according to 9 6 6.1.5.1 (single tanda method).
- the silicone-coated fabric was adjusted to a standard condition according to jISL 0105 and sampled into a rectangle of 270 x 270 mm.
- the sample was grasped with its longitudinal and weft directions aligned in the X and Y directions of the measuring instrument, and measurements were made in each direction of the 200 mm x 200 mm portion of the sample.
- a tensile tester a product name “biaxial tensile tester 2 AT-50000” (manufactured by Shimadzu Corporation) was used, and the test was carried out at a simultaneous pull of 200 m / min on both axes.
- Si-ichi (XMA) product name “700 0 0” manufactured by HORIBA, Ltd.
- S i — was observed and the area integration was performed 20 times.
- the observation integration area is the area from the overlap center of the yarn to 50% of the repeating unit length in the direction from the front to the back of the fabric in the weaving composition repeating unit of the weaving yarn of the silicone-coated fabric cross-section sample.
- the distribution of Si (count) was plotted on the Y axis, and the direction from the front to the back of the fabric was plotted on the X axis.
- the height ratio between the maximum peak and other peaks was determined from the height of the Si peak.
- the silicone-coated fabric was subjected to KES standard conditions (The Standa rdization and Analysis of Hand Eva ⁇ at ion, 7.2nd Ed. S. Ka abata, 8. The Textile Machinery Society of Japan, 9.1980).
- the measurement was performed by attaching a sample cloth to the surface of the friction element designated by KES and moving the same on the same sample cloth held horizontally.
- the direction in which the cloth was attached was matched with the longitudinal direction and the weft direction of the horizontally held sample cloth, respectively.
- the measurement was performed at five points in the sample, and the average value was obtained.
- the measurement was performed according to the FMVSS302 method (horizontal method).
- the measurement was performed according to the JISL—10968.27A method (Fragile method).
- the spinning oil was prepared as a 30% by weight carbon solution of ⁇ dialkyl thiodipropionate, 40 parts of PO / EO alkyl polyether, 30 parts of POE hydrogenated castor oil trialkyl ester '' as a 30% by weight carbon solution. was refueled in the same way.
- a warping oil agent S1700 (trade name) (manufactured by Yoyo Kagaku Kogyo Co., Ltd.) was applied in an amount of 1.0 wt% by a kiss roll method, and the total amount of the oil agent on the warp yarn was added. To 2.0 wt%. Warp preparation such as one-ming was performed, and weaving was performed with an air jet loom (AJL) to obtain each woven fabric.
- the fabric was not scoured or heat set.
- the coating was performed by coating a water-based silicone composition dope with a solid content of 3 gm 2 using a dip coater and heat-treating it in a dryer at 180 Z 200 ° C. for 2 minutes.
- the silicon corn composition dope is a silicon corn aqueous emulsion “DEHESIVE 3 1981 VP” (manufactured by Kärchem I, Germany) 23.5 parts, Si bonded hydrogen atom "Cross Linker V20" (manufactured by Ecker Chem, Germany), a product name of organopolysiloxane having at least three phenols, and a product name of an organic silicon compound suitable as an adhesion aid "Adhesion Promotor HF86" (manufactured by German company Peki-ichi Chemi) 1.5 parts and 74.0 parts of water were mixed with stirring.
- the liquid silicone composition was coated with a solid content of 10 g / m 2 by a floating knife coater, and heat-treated for 1 minute in a dryer at 180/200 ° C. Coating cloth was obtained.
- the liquid silicone composition is an addition-type cross-linkable type, which contains a cross-linking agent and an addition reaction catalyst.
- the product name is “E lastosil LRLR 600 AZB” (manufactured by Ecker Chemi GmbH, Germany).
- Crosslinker W brand name: Crosslinker W, Germany
- an organopolysiloxane having at least three Si-bonded hydrogen atoms which is a mold-crosslinking agent, 3 parts
- adhesive aid As an appropriate organosilicon compound, a mixture of 3 parts of trade name “Adhesion Promoter HF86” (manufactured by Decka Chem, Germany) was used.
- the cutting edge of the coating knife is 0.1 mm thick and is coated with a fabric tension of 100 kgf / m from 1 O kgf Zm. The coating amount was adjusted.
- Table 1 shows the results of creating air bags for samples having different fineness and weave composition and using the obtained coating cloth.
- Example 11 Example 12 Example 13 Comparison 11 Comparison 12 History History History History History Total fineness (dtex) 115 115 155 155 235 235 78 78 350 350 Single yarn fineness (dtex) 3.2 3.2 3.2 3.2 2.9 2.9 3.3 3.3 5.9 5.9 weave density (present /2.54cm) 107 107 91 91 75 75 140 140 60 60 woven fineness (the 'dtex / 2.54cm) 12305 12305 14105 14105 17625 17625 10920 10920 21000 21000 group cloth fabric basis weight (g / m 2) 107 121 147 97 173 Total application amount (g / m 2 ) 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13
- Comparative Example 11 the total fineness of the woven fabric was too small, and the coated fabric itself was torn without breaking into the airbag and the base fabric was broken. In Comparative Example 1 and 2, the overall fineness of the woven fabric is too large, so that the targeted compact airbag is not obtained and the deployment time is long. Examples 11 to 23 are compact air bags, which have no problem in deployability, have no punch-through holes, and have a short deployment time.
- Tables 2 and 3 show the results of preparing a coating cloth in the same manner as in Example 11 and evaluating the tensile strength and tear strength.
- Example 21 Example 22
- Example 23 Example 24
- Example 26 Example 27
- Base fabric weight (g / m 2 ) 107 106 121 117 147 128 147 Total coating amount (g / m 2 ) 13 13 13 13 13 13 13 13 13
- Comparative Examples 31, 32, 34, and 35 the total fineness of the woven yarn was small or the woven density was low, and the base fabric was broken by tearing.
- Comparative Example 33 bag breakage with burn-through holes was observed.
- Comparative Example 36 where the airbag was not broken, the airbag was torn from the mounting hole where the airbag was mounted, so that safety was not maintained.
- Comparative Example 37 the addition of an adhesion aid or a cross-linking agent in the silicone composition and the low weaving density resulted in an excessively high tear convergence rate, and a hot gas leaked at the sewn portion when the bag was broken. As a result, a portion where the seam was in a molten state was observed. Comparative Example 38 was not compact because the total fineness of the woven yarn was large, and the airbag deployment time was long.
- Example 21 the tear convergence ratio was in a good range when the silicone composition was supplemented with an adhesion aid or a cross-linking agent. There is no problem in bag deployment and it is good.
- Example 25 the silicone composition of the film coating did not include an adhesion aid, but there was no problem.
- Example 24 no adhesion aid or cross-linking agent was added to the silicone composition, but the weave density was relatively low, the tear convergence rate was a good value, and there was no problem with airbag deployment.
- Table 4 shows the results of a biaxial tensile test conducted by changing the fineness and weaving composition of the fibers used.
- Example 41 Example 42 Example 43 Example 43 Comparative Example 41 Comparative Example 42 Comparative Example 43 History History History History History History History History Fineness (dtex) 115 115 155 155 235 235 235 235 235 235 78 470 470 940 940 i] 3 ⁇ 43 ⁇ 4ix., I ex no 3.2 3.2 3.2 3.2 2.9 2.9 2.9 2.9 3.2 3.2 6.7 6.7 6.7 Fineness, cN / dtex) 8.5 8.5 8.5 8.5 8.5 8.5 7.0 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 Job ⁇ B degree / 2.54cmJ 107 107 91 91 75 75 75 75 75 140 140 46 46 32 32 iD4cm 12305 12305 14105 14105 17625 17625 17625 10920 10920 21620 21620 30080 30080-
- Comparative Example 41 shows that the base fabric itself was torn and did not have pressure resistance, and the biaxial extension strength was insufficient. Comparative Examples 42 and 43 had a very high biaxial extension strength and no problem as an air bag, but did not become the targeted compact air bag and the deployment time was long.
- Example 41 the biaxial extension strength is sufficient and there is no problem in airbag deployment.
- Example 43 Example 3 shows a case where the heat draw ratio is reduced and the yarn strength is low when making nylon 66 yarn, but the biaxial elongation strength as a coating cloth is sufficient, and there is a problem with airbag deployment. There is no.
- Woven nylon 66 fabric with a water jet loom use an acrylic paste instead of a warping oil during aging and carry out alkaline scouring, washing, drying, and heat setting at 170 ° C.
- a coated cloth was prepared and evaluated in the same manner as in Example 1 except that a green greige for coating was obtained by performing the above.
- Table 5 shows the results obtained by changing the fineness of the fibers used, the weave composition, and the amount of application.
- Example 51 Example 52 Example 53 Example 54 Example 55 Example 56 Example 57 Warp Warp Warp Warp Warp Total fineness (dtex) 110 110 155 155 155 155 155 155 155 155 155 155 155 235 235 235 Single yarn fineness (dtex) 3.2 3.2 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9
- Comparative Example 51 Comparative Example 52 Comparative Example 53 Comparative Example 54 Comparative Example 55 Comparative Example 56 History (i3 ⁇ 4 Latitude History Latitude Total fineness (dtex) 78 78 155 155 155 235 235 350 350 350 350 155 155 Single yarn fineness (dtex) 3 3 3. 3 2. 9 2. 9 2. 9 2. 9 5. 9 5. 9 5. 9 5. 9 2. 9 2.9 Weave density (books / 2.54 cm) 140 140 91 91 75 75 60 60 60 60 60 91 91 woven fineness (the 'dtex / 2.
- Comparative Examples 51, 52, 53, and 55 in which the total amount of coating was large, the surface of the coating film was glossy and had little unevenness, and the touch felt was also tacky, and the friction coefficient was high. . These have been taking longer to deploy in airbag deployment.
- Comparative Example 54 the total fineness of the woven yarn was high and the coefficient of friction was reduced, but it was not a compact air bag.
- Example 51 to 57 the frictional resistance was reduced not only on the film-coated surface but also on the back surface of the non-film-coated surface, and the spreading time was shortened. Further, horny damage evaluation is 3. 8 mu S in the film co one up surface, 4. Was as low as 2 mu S in the non-film-coated surface (back side). It was found that skin damage was significantly suppressed by dip silicon even without silicon film. In Comparative Example 54, although the total fineness was too large and the frictional resistance was low, the intended compact airbag was not obtained, and the deployment time was long. Examples 6 1 to 6 2 and Comparative Examples 6 1 to 6 2
- a silicone-coated fabric was prepared and evaluated in the same manner as in Example 11 except that the nylon 66 woven fabric was woven with a Levia loom.
- Table 6 shows the results of air permeability evaluation performed by changing the amount of application and the method of application.
- Example 61 Example 62 Comparative Example 61 Comparative Example 62 History History History History Total fineness (dtex) 155 155 155 155 155 155 155 155 155 155 155 155 155 Single yarn fineness (dtex) 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 /2.54cm) 91 91 91 91 91 91 91 91 91 Woven fineness (book 'dtex / 2.54cm) 14
- Example 61 and 62 the fine differential aeration by the Frazier method was non-aerated below the reading limit, and was also non-aerated under a high pressure of 300 kPa. Further, the pressure retention after holding once at a high pressure of 300 kPa for 10 seconds and then at a pressure of 50 kPa for 10 seconds was 90% or more.
- Comparative Example 61 only the dip coating was 3 g / m 2 , which was not ventilated by the Frazier method, but had a longer ventilation time due to the ventilation under high pressure.
- Comparative Example 62 the film coating was only 4 g / m 2 , and the air permeability under high pressure was small, but the pressure retention after high pressure could not be maintained.
- a coating cloth was prepared and evaluated in the same manner as in Example 11. The amount of silicone applied, the means of application, and the composition of the coating were changed to make it less noticeable. Table 7 shows the results. However, two more copies of “E lastosil Pigment Pastes FLR ed” (manufactured by Ecker Chemie GmbH, Germany) were added to the film coating as a distinctive coloring agent for the front and back sides.
- Example 71 Example 72 Example 73 Example 74 Comparative Example 71 Comparative Example 72 Comparative Example 73 Comparative Example 74 Comparative Example 75 Latitude Latitude Latitude f ⁇ * # Latitude Latitude Latitude Latitude Latitude Total fineness (dtex ) 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175 175
- Comparative Example 71 is a dip coating only
- Comparative Example 72 is a knife coating only one type of each silicone. The coating amount is too small to pass the FMV SS302 combustion evaluation.
- Comparative Example 73 the spread time was prolonged due to the excessive amount of application.
- Comparative Example 74 only the knife coating was used, and the application of one type of silicone failed the combustion suppression effect and burn-through holes were observed.
- Comparative Example 75 is an example in which a modified silicone used as a softener in dip coating was provided.
- the modified silicone was an amino-modified silicone, trade name "CT95E" (manufactured by Deutsche Ducker Chemi-Co.). Combustion suppression effect was insufficient and FMV S S302 combustion evaluation was rejected, and burn-through holes were observed.
- FIG. 5 shows an electron microscopic (SEM) photograph of a cross-sectional sample of the silicone-coated fabric of Example 73, which is perspectively photographed so that the cross-section and the surface of the silicone film can be seen.
- the base fabric is a dense woven fabric that has no gap between the warp and the weft, and that the single yarn spreads at the overlapping portion so as to cover each woven yarn.
- the surface of the silicone film has an irregular shape as if the ridges of the woven yarn of the woven fabric were copied.
- the silicon coating is very thin and uniform.
- silicone dip coating between fibers was hardly revealed by SEM observation.
- the cross section of the sample of Example 73 was cut at the center of the yarn, and the Si—K was analyzed by XMA.
- the chart is shown in Figure 4.
- the distribution of Si showed a maximum peak at the coating film, and a small peak was observed on the back surface of the coating film. This The peak ratio of the small peaks was 0.44, which corresponded to the segregated portion of the dip coating.
- a soft and light silicone-coated fabric prepared by applying a silicone coating with a specific structure to a high-density base fabric made of synthetic fibers with a small fineness. Test pass), which has special effects on heat resistance, flexibility, and low friction.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Dispersion Chemistry (AREA)
- Air Bags (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Materials For Medical Uses (AREA)
- Medical Preparation Storing Or Oral Administration Devices (AREA)
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/257,151 US20040077236A1 (en) | 2001-02-01 | 2001-10-05 | Silicone coating cloth and air bag |
DE2001628491 DE60128491T2 (de) | 2001-02-01 | 2001-10-05 | Mit silicon beschichtete gewebe sowie luftsack |
KR10-2003-7010154A KR100497927B1 (ko) | 2001-02-01 | 2001-10-05 | 실리콘 코팅 포백 및 에어백 |
EP01972712A EP1365059B1 (en) | 2001-02-01 | 2001-10-05 | Silicone coating cloth and air bag |
JP2002561126A JP3727310B2 (ja) | 2001-02-01 | 2001-10-05 | シリコーンコーティング布帛およびエアバッグ |
US11/359,403 US7309666B2 (en) | 2001-02-01 | 2006-02-23 | Method for making a silicone coated fabric |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001026103 | 2001-02-01 | ||
JP2001-26103 | 2001-02-01 | ||
JP2001134396 | 2001-05-01 | ||
JP2001-134396 | 2001-05-01 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10257151 A-371-Of-International | 2001-10-05 | ||
US11/359,403 Division US7309666B2 (en) | 2001-02-01 | 2006-02-23 | Method for making a silicone coated fabric |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002061200A1 true WO2002061200A1 (fr) | 2002-08-08 |
Family
ID=26608808
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2001/008834 WO2002061200A1 (fr) | 2001-02-01 | 2001-10-05 | Etoffe et sac gonflable a revetement de silicone |
Country Status (9)
Country | Link |
---|---|
US (2) | US20040077236A1 (ja) |
EP (1) | EP1365059B1 (ja) |
JP (1) | JP3727310B2 (ja) |
KR (1) | KR100497927B1 (ja) |
CN (1) | CN100507142C (ja) |
AT (1) | ATE362561T1 (ja) |
DE (1) | DE60128491T2 (ja) |
TW (1) | TW521051B (ja) |
WO (1) | WO2002061200A1 (ja) |
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EP1669481A1 (en) * | 2003-09-29 | 2006-06-14 | Asahi Kasei Chemicals Corporation | High-density hollow weave ground fabric |
JP2006161212A (ja) * | 2004-12-07 | 2006-06-22 | Toray Ind Inc | エアベルト用基布およびその製造方法 |
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JP2007100292A (ja) * | 2006-12-22 | 2007-04-19 | Toyobo Co Ltd | エアバッグ用織物 |
JP2007261380A (ja) * | 2006-03-28 | 2007-10-11 | Sumisho Airbag Systems Co Ltd | エアバッグ用基布及びその製造方法 |
JPWO2006043517A1 (ja) * | 2004-10-19 | 2008-05-22 | 東レ株式会社 | 拘束装置用布帛およびその製造方法 |
JP2008138305A (ja) * | 2006-11-30 | 2008-06-19 | Seiren Co Ltd | エアバッグ用基布及びエアバッグ |
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- 2001-10-05 KR KR10-2003-7010154A patent/KR100497927B1/ko active IP Right Grant
- 2001-10-05 DE DE2001628491 patent/DE60128491T2/de not_active Expired - Lifetime
- 2001-10-05 CN CNB018223990A patent/CN100507142C/zh not_active Expired - Lifetime
- 2001-10-05 TW TW90124714A patent/TW521051B/zh not_active IP Right Cessation
- 2001-10-05 WO PCT/JP2001/008834 patent/WO2002061200A1/ja active IP Right Grant
- 2001-10-05 AT AT01972712T patent/ATE362561T1/de not_active IP Right Cessation
- 2001-10-05 EP EP01972712A patent/EP1365059B1/en not_active Expired - Lifetime
- 2001-10-05 US US10/257,151 patent/US20040077236A1/en not_active Abandoned
- 2001-10-05 JP JP2002561126A patent/JP3727310B2/ja not_active Expired - Fee Related
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2006
- 2006-02-23 US US11/359,403 patent/US7309666B2/en not_active Expired - Lifetime
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Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1548180A4 (en) * | 2002-10-04 | 2006-09-06 | Toray Industries | COATED BASE TISSUE FOR AIRBAGS AND AIRBAGS |
JP2004204404A (ja) * | 2002-12-26 | 2004-07-22 | Toray Ind Inc | エアバッグ用基布およびエアバッグおよびその製造方法 |
EP1669481A4 (en) * | 2003-09-29 | 2007-07-18 | Asahi Kasei Chemicals Corp | HIGH-DENSITY HOLLOW FABRICS |
EP1669481A1 (en) * | 2003-09-29 | 2006-06-14 | Asahi Kasei Chemicals Corporation | High-density hollow weave ground fabric |
US7690401B2 (en) | 2003-09-29 | 2010-04-06 | Asahi Kasei Chemicals Corporation | High-density hollow weave ground fabric |
JP2006082443A (ja) * | 2004-09-16 | 2006-03-30 | Dow Corning Toray Co Ltd | エアバッグ用布およびその製造方法 |
JPWO2006043517A1 (ja) * | 2004-10-19 | 2008-05-22 | 東レ株式会社 | 拘束装置用布帛およびその製造方法 |
JP2006161212A (ja) * | 2004-12-07 | 2006-06-22 | Toray Ind Inc | エアベルト用基布およびその製造方法 |
JP2007261380A (ja) * | 2006-03-28 | 2007-10-11 | Sumisho Airbag Systems Co Ltd | エアバッグ用基布及びその製造方法 |
US8722550B2 (en) | 2006-08-24 | 2014-05-13 | Seiren Co., Ltd. | Base fabric for air bag, method of producing the same and air bag |
JP2008138305A (ja) * | 2006-11-30 | 2008-06-19 | Seiren Co Ltd | エアバッグ用基布及びエアバッグ |
JP2007100292A (ja) * | 2006-12-22 | 2007-04-19 | Toyobo Co Ltd | エアバッグ用織物 |
JP2008163512A (ja) * | 2006-12-28 | 2008-07-17 | Toyobo Co Ltd | エアバッグ用織物 |
DE102009002828A1 (de) | 2009-05-05 | 2010-11-11 | Wacker Chemie Ag | Zusammensetzungen für Textilbeschichtungen |
US8658547B2 (en) | 2009-05-05 | 2014-02-25 | Wacker Chemie Ag | Compositions for textile coatings |
WO2012056954A1 (ja) * | 2010-10-26 | 2012-05-03 | 東洋紡績株式会社 | エアバッグ用コーティング基布 |
JP5403150B2 (ja) * | 2010-10-26 | 2014-01-29 | 東洋紡株式会社 | エアバッグ用コーティング基布 |
US8815757B2 (en) | 2010-10-26 | 2014-08-26 | Toyobo Co., Ltd. | Coated base fabric for air bags |
JP2012158850A (ja) * | 2011-02-01 | 2012-08-23 | Asahi Kasei Fibers Corp | エアバッグ織物 |
Also Published As
Publication number | Publication date |
---|---|
CN1518620A (zh) | 2004-08-04 |
US7309666B2 (en) | 2007-12-18 |
JPWO2002061200A1 (ja) | 2004-06-03 |
EP1365059A1 (en) | 2003-11-26 |
TW521051B (en) | 2003-02-21 |
CN100507142C (zh) | 2009-07-01 |
US20060194007A1 (en) | 2006-08-31 |
KR100497927B1 (ko) | 2005-07-01 |
KR20030074769A (ko) | 2003-09-19 |
ATE362561T1 (de) | 2007-06-15 |
US20040077236A1 (en) | 2004-04-22 |
DE60128491T2 (de) | 2008-02-07 |
EP1365059B1 (en) | 2007-05-16 |
DE60128491D1 (de) | 2007-06-28 |
EP1365059A4 (en) | 2005-03-02 |
JP3727310B2 (ja) | 2005-12-14 |
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