WO2015151358A1 - エアバッグ用コート基布 - Google Patents
エアバッグ用コート基布 Download PDFInfo
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- WO2015151358A1 WO2015151358A1 PCT/JP2014/083964 JP2014083964W WO2015151358A1 WO 2015151358 A1 WO2015151358 A1 WO 2015151358A1 JP 2014083964 W JP2014083964 W JP 2014083964W WO 2015151358 A1 WO2015151358 A1 WO 2015151358A1
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- WIPO (PCT)
- Prior art keywords
- base fabric
- coating
- silicone resin
- fabric
- resin
- Prior art date
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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
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D1/00—Woven fabrics designed to make specified articles
- D03D1/02—Inflatable articles
-
- 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
-
- 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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- 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
- D10B2505/00—Industrial
- D10B2505/12—Vehicles
- D10B2505/124—Air bags
Definitions
- the present invention relates to a coated fabric used for an automotive airbag, and more particularly to a coated fabric for an airbag in which the tensile strength of the coated fabric is improved without increasing the yarn strength.
- airbags which have been rapidly installed as one of the safety parts of automobiles, detect high-pressure, high-pressure gas from the inflator when a car crash occurs. It is used for the purpose of preventing and protecting the body of a driver or passenger, particularly the head, from colliding with a handle, a windshield, a door glass or the like by rapidly deploying an airbag.
- automobile airbags are not only used for driver seats and passenger seats, but also practically used for knee airbags, side airbags, curtain airbags, etc., and it is common to install a plurality of airbags. ing.
- the fineness of the filament used for the coating base fabric for the airbag has been reduced from 940 dtex to 470 dtex, and in recent years has been changed to a base fabric using a filament with a fineness of 350 dtex.
- An object of the present invention is to provide a coated fabric for an air bag that has improved the tensile strength of the coated fabric without using a high strength fiber of 9 cN / dtex or more, which cannot be solved by the prior art.
- the present inventor in an airbag base fabric in which a thermoplastic resin is coated on one side of a woven fabric, causes the resin to exist from the coated surface side to the uncoated surface side warp and weft meshes when coating the resin.
- the present invention has been completed.
- the present invention is typically as follows.
- An airbag coating base fabric in which a silicone resin is applied to one side of a woven fabric composed of synthetic fiber filaments, and the silicone resin is present at the mesh between warp and weft on an uncoated surface Coating base fabric.
- the viscosity before coating of the silicone resin is 15 Pa ⁇ sec or less, the film strength of the resin is 5 MPa or more, the film elongation is 150% or less, and the hardness is 45 or more.
- the coating base fabric for airbags as described.
- [4] The coating base fabric for an air bag according to any one of [1] to [3], wherein the coating amount of the silicone resin is 5 g / m 2 or more and 35 g / m 2 or less.
- [5] The air according to any one of [1] to [4], wherein the application method of the silicone resin is a knife-on-air method, and the knife is pressed by 1 to 6 mm. Coating base fabric for bags.
- [6] The coated fabric for airbags according to any one of [1] to [5], wherein the total fineness of the filaments constituting the woven fabric is 200 to 600 dtex.
- [7] The coating base fabric for an air bag according to any one of [1] to [6], wherein the cover factor of the woven fabric is 1,800 to 2,500.
- this invention provides the manufacturing method of the coating base fabric for airbags as follows.
- a method for producing a coating base fabric for an air bag which synthesizes a silicone resin having a viscosity of 15 Pa ⁇ sec or less, a resin film strength of 5 MPa or more, a film elongation of 150% or less, and a hardness of 45 or more.
- a method for producing a coating base fabric for an air bag which is applied to only one side of a woven fabric composed of fiber filaments.
- the coated fabric for airbags of the present invention maintains its strength even when the fineness is lowered. Therefore, even airbags that require particularly high internal pressure retention performance are excellent in quality and reliability, and can be stored compactly. This has the advantage that design constraints can be reduced.
- the present invention provides an airbag coating base fabric in which a silicone resin is applied to one side of a woven fabric composed of synthetic fiber filaments, and the coated silicone resin is present at the meshed portion of the warp and weft on the uncoated side. It is characterized by doing.
- Siliconone resin is present refers to a state in which the silicone resin can be visually confirmed at the intersection of the uncoated surface of the uncoated surface and the weft, that is, the joint, as shown in FIG. Specifically, a surface photograph of an uncoated surface can be taken using a scanning electron microscope (SEM) and judged visually.
- SEM scanning electron microscope
- a woven fabric composed of synthetic fiber filaments means a woven fabric woven using synthetic fiber filament yarns.
- the woven fabric is excellent in that it is excellent in mechanical strength and can be reduced in thickness.
- plain weave, twill weave, satin weave, and these changed weaves, multiaxial weaves, etc. can be applied, and plain fabrics that are superior in mechanical strength are particularly preferable.
- Examples of synthetic fibers include aliphatic polyamide fibers such as nylon 66, nylon 6, nylon 46, and nylon 12, aromatic polyamide fibers such as aramid fibers, and polyester fibers such as polyethylene terephthalate, polytrimethylene terephthalate, and polybutylene terephthalate. used.
- Other examples include wholly aromatic polyester fibers, polyparaphenine / benzobis / oxazole fibers (PBO fibers), ultrahigh molecular weight polyethylene fibers, polyphenylene sulfide fibers, and polyether ketone fibers.
- polyester fibers and polyamide fibers are preferable, and polyamides 6 and 6 are particularly preferable. Further, these fibers may be obtained from raw materials that are partially or wholly reused.
- these synthetic fibers may contain various additives in order to improve process passability in the raw yarn manufacturing process and the post-processing process.
- the additive include an antioxidant, a heat stabilizer, a smoothing agent, an antistatic agent, a thickener, a flame retardant, and the like.
- the synthetic fiber may be an original yarn or dyed after yarn production. Further, the cross section of the single yarn may be an irregular cross section in addition to a normal round cross section. As the synthetic fiber, it is preferable to use a multifilament yarn of 72 filaments or more from the viewpoint of flexibility and smoothness of the coated surface.
- the coating resin is preferably an elastomer resin having heat resistance, cold resistance and flame retardancy, but the silicone resin is most effective.
- silicone resins include addition polymerization type silicone rubber.
- dimethyl silicone rubber, methyl vinyl silicone rubber, methyl phenyl silicone rubber, trimethyl silicone rubber, fluoro silicone rubber, methyl silicone resin, methyl phenyl silicone resin, methyl vinyl silicone resin, epoxy modified silicone resin, acrylic modified silicone resin, polyester modified A silicone resin etc. are mentioned.
- methyl vinyl silicone rubber is preferable because it has rubber elasticity after curing, is excellent in strength and elongation, and is advantageous in terms of cost.
- the resin viscosity of the silicone resin used is very important.
- the viscosity of the silicone resin is preferably 15 Pa ⁇ sec or less, more preferably 12 Pa ⁇ sec or less.
- the resin viscosity is higher than 15 Pa ⁇ sec, the resin cannot be present at the meshed portion of the warp and weft on the non-coated surface, which is essential for improving the tensile strength of the coated base fabric. Since the resin exists up to the uncoated surface side at the joint between the warp and weft where the yarn can move freely, the yarn is constrained and the entire yarn breaks at one time during normal tensile testing.
- the lower limit is not particularly limited, but is preferably 5 Pa ⁇ sec or more. Any solvent-based or solvent-free system may be used as long as the viscosity can be adjusted within the above range, but a solvent-free system is preferable in consideration of the influence on the environment.
- the viscosity of the resin composition is also defined as “resin viscosity”.
- the film strength of the resin is preferably 5 MPa or more and the film elongation is 150% or less.
- film strength and film elongation are linked physical properties, but when the film elongation is 150% or less, the resin extends when the resin is present at the uncoated surface warp and weft meshes.
- the yarn is restrained by restraining the yarn and the yarn is constrained and the yarn is broken all at once, so that a high tensile strength can be achieved as the base fabric.
- a more preferable range of film elongation is 120% or less.
- the upper limit of the film strength is not particularly limited, but is preferably 10 MPa or less.
- the film elongation is preferably 50% or more from the viewpoint of the flexibility of the coating base fabric.
- the sample for measuring the film strength and elongation of the silicone resin is prepared by actually coating the airbag fabric and adjusting the conditions (temperature, time, pressure) when forming the film. Specifically, a resin film having a constant thickness of 0.5 mm made of silicone resin is produced, and cured by heating at 190 ° C. for 2 minutes by a hot air irradiation method, and a tensile test is performed.
- the hardness of the resin is preferably measured according to ASTM D2240, and the hardness measured using a Shore A hardness meter is preferably 45 or more. More preferably, it is 47 or more.
- the hardness is 45 or more, the tensile strength of the base fabric is high because the yarn is restrained by the deformation of the resin during the tensile test, as well as the elongation of the resin, and the yarn is constrained and the whole yarn is broken at once. Strength can be achieved.
- an upper limit is not specifically limited, Usually, it is 70 or less.
- the alkenyl group-containing polysiloxane which is a main component constituting the coat layer of the coated cloth of the present invention, is bonded to silicon atoms in one molecule in order to form a silicone resin film having rubber elasticity after the resin is cured.
- the viscosity at 25 ° C. of the alkenyl group-containing polysiloxane component is preferably 10,000 to 30,000 mPa ⁇ sec from the viewpoint of physical properties such as adhesion of the cured product to fibers, rubber strength, blocking resistance, and workability. Particularly preferred is 13,000 to 27,000 mPa ⁇ sec.
- the organohydrogenpolysiloxane that constitutes the silicone resin reacts with the alkenyl group-containing polysiloxane by a hydrosilylation addition reaction and acts as a crosslinking agent.
- the molecular structure of the organohydrogenpolysiloxane may be, for example, a linear, cyclic, branched, or three-dimensional network structure.
- Organohydrogenpolysiloxane has at least two (usually about 2 to 300) or more hydrogen atoms bonded to silicon atoms in one molecule.
- the hydrogen atoms bonded to these silicon atoms are located only at either the molecular chain end or in the middle of the molecular chain (ie, the molecular chain non-terminal). Or both.
- the organohydrogenpolysiloxane (B) preferably has a viscosity at 25 ° C. of 0.1 to 1,000 mPa ⁇ sec, particularly preferably 0.1 to 500 mPa ⁇ sec.
- the compounding amount of the organohydrogenpolysiloxane (B) is usually 1 to 1 hydrogen atoms bonded to the silicon atoms in the component (B) with respect to one alkenyl group bonded to the silicon atoms in the component (A).
- the amount is in the range of 20, more preferably 1 to 10, particularly preferably 1 to 5.
- the film strength and elongation of the resin can be adjusted by the molecular weight of the alkenyl group-containing polysiloxane and the structure and mixing amount of the organohydrogenpolysiloxane.
- a reaction curing agent may be used, and a typical example is platinum or a platinum compound catalyst (platinum catalyst).
- platinum catalyst platinum catalyst
- Known materials can be used, and specific examples include platinum black, chloroplatinic acid, alcohol-modified products of chloroplatinic acid, complexes of chloroplatinic acid and olefins, aldehydes, vinyl siloxanes or acetylene alcohols.
- platinum black platinum black
- chloroplatinic acid chloroplatinic acid
- alcohol-modified products of chloroplatinic acid complexes of chloroplatinic acid and olefins
- aldehydes aldehydes
- vinyl siloxanes or acetylene alcohols acetylene alcohols.
- the silicone resin contains an adhesion assistant.
- the adhesion assistant for example, at least selected from the group consisting of an amino silane coupling agent, an epoxy-modified silane coupling agent, a vinyl silane coupling agent, a chloro silane coupling agent, and a mercapto silane coupling agent Although 1 or more types are mentioned, it is not limited to these.
- reinforcing inorganic fillers such as fumed silica and dry silica, cross-linkable silicone (silicone resin) with adjusted end groups, non-reinforcing inorganic such as calcium carbonate, calcium silicate, and titanium dioxide Fillers can be added.
- the amount of these inorganic fillers used is 0.1 to 200 parts by weight, particularly preferably 0.1 to 100 parts by weight of the alkenyl group-containing polysiloxane component.
- an inorganic pigment or an organic pigment may be added as a colorant.
- the inorganic pigment include carbon black, titanium oxide, red bengara, black bengara, titanium yellow, and cobalt blue.
- Series yellow, red
- isoindolinone yellow, orange
- quinacridone red, purple
- diketopyrrolopyrrole Orange, red, purple
- anthraquinone yellow, red, blue
- Dioxazine purple
- benzimidazolone Orange
- copper phthalocyanine blue
- allylamide yellow
- the resin coating amount of the airbag coating base fabric of the present invention is preferably 5 to 45 g / m 2 . More preferably, it is 10 to 35 g / m 2 .
- the amount of the resin applied is 5 g / m 2 or less, the thickness of the resin layer applied to the surface of the fabric is reduced, so that the required resin thickness on the surface of the coated fabric cannot be obtained and airflow suppression can be achieved. Disappear.
- the coating amount is 45 g / m 2 or more, the flexibility of the coated fabric deteriorates, so that not only the storage property is impaired, but also the weight of the entire bag is increased.
- the background average resin thickness at the top of the coated fabric surface is preferably 4 ⁇ m or more, more preferably 6 ⁇ m or more.
- the top of the head means a portion of the warp or weft where the film pressure of the resin is thinned.
- the resin coating method is very important in order for the resin to be present at the portion where the uncoated surface warps and wefts meet.
- a method for applying the resin a conventionally known method is used.
- knife coating particularly coating by knife-on-air method is the most. preferable.
- the resin can easily penetrate into the inside of the fabric, but it becomes difficult for the resin to be present at the top of the fabric on the coated surface, and the airflow suppression originally required for the coated fabric cannot be achieved.
- the knife used for knife coating can use a semicircular shape, a square shape, or the like as the tip shape of the blade.
- the base fabric tension in the traveling direction is preferably 300 to 800 N / m, and particularly preferably 400 to 750 N / m.
- the base fabric tension in the traveling direction is less than 400 N / m, the bulk of the ear portion of the base fabric becomes high, and a large difference is likely to occur between the application amount of the central portion and the end portion of the base fabric.
- the base fabric tension in the advancing direction exceeds 800 N / m, the gap between the warp and the weft is filled, and the resin cannot exist in the meshed portion of the uncoated surface between the warp and the weft.
- the pushing amount of the knife is 1 to 6 mm.
- the knife push-in amount corresponds to the amount the knife is pushed downward from the height of the upper surface of the bed located immediately before the height (FIG. 2). More preferably, it is 1.5 to 4.5 mm.
- the resin cannot be present in the meshed portion of the uncoated surface warp and weft which is the object of the present invention.
- the resin can easily penetrate into the inside of the fabric, but it becomes difficult for the resin to be present at the top of the fabric on the coated surface, and the airflow suppression originally required for the coated fabric cannot be achieved.
- a general heating method such as hot air, infrared light, microwave, or the like can be used.
- the heating temperature and time it is sufficient that the silicone resin has reached a temperature sufficient for curing.
- the heating temperature is 150 to 220 ° C.
- the heating time is 0.2 to 5 minutes.
- the total fineness of the filament yarn constituting the woven fabric is preferably 200 to 600 dtex.
- the total fineness exceeds 600 dtex, the thickness of the base fabric increases, and the storage capacity of the airbag tends to deteriorate.
- the mechanical properties during the operation of the airbag such as the tearing mechanical properties of the coating base fabric, are likely to deteriorate.
- the cover factor of the woven fabric serving as the base fabric is preferably 1,800 to 2,500, and particularly preferably 1,900 to 2,450.
- the cover factor is less than 1,800, physical properties (such as tear strength) required for an airbag are lowered.
- the cover factor exceeds 2,500, there are limitations due to weaving and storage properties.
- the prepared resin film was subjected to a tensile test at a speed of 10 mm / min with a chuck of 10 mm using a constant-speed tension type tensile tester, and the strength and elongation at break were measured. (7) Hardness Using the method described in ASTM D2240, the hardness was measured using a Shore A hardness meter. (8) Amount of coating The coated fabric after the resin is cured is accurately sampled at 5 cm square, and dipped in a solvent (hexafluoroisopropanol in the case of polyamide 66) that dissolves only the fiber that is the base fabric. Was dissolved. Next, only the silicone coating layer, which is an insoluble material, was collected and washed with acetone.
- a solvent hexafluoroisopropanol in the case of polyamide 66
- Example 1 A polyamide 66 multifilament yarn having an original yarn strength of 8.2 cN / dtex and a total fineness of 470 dtex and 144 filaments was woven in a water jet loom as a plain weave. Next, after shrinking with boiling water, it was dried at 110 ° C. to obtain a woven fabric having a warp density of 46 / 2.54 cm, a weft density of 46 / 2.54 cm, and a cover factor of 1,994. The tensile strength of this base fabric was 635 N / cm in the warp direction and 658 N / cm in the weft direction.
- a solventless silicone resin composition comprising the following composition and having a viscosity at 25 ° C. of 9 Pa ⁇ sec was prepared.
- the film strength of the silicone resin was 6.0 MPa
- the film elongation was 97%
- the hardness was 55.
- the silicone resin composition was applied to one side of the woven fabric by using a knife-on-air knife having a tip radius R of 0.3 mm, adjusting the base fabric tension to 500 N / m and the knife pressing amount to 1 mm. . Furthermore, it was cured at 190 ° C. for 2 minutes to obtain a coated base fabric having an application amount of 20 g / m 2 . The properties of the resulting coated base fabric were evaluated and are shown in Table 1. The obtained base fabric was impregnated with resin up to the uncoated surface, and the tensile strength was improved by 9% after coating.
- Example 2 A polyamide 66 multifilament yarn having an original yarn strength of 8.0 cN / dtex, a total fineness of 470 dtex, and 72 filaments was woven in a water jet loom as a plain weave. Next, after shrinking with boiling water, it was dried at 110 ° C. to obtain a woven fabric having a warp density of 46 / 2.54 cm, a weft density of 46 / 2.54 cm, and a cover factor of 1,994. The tensile strength of this base fabric was 638 N / cm in the warp direction and 619 N / cm in the weft direction.
- a solventless silicone resin composition having a viscosity of 8 Pa ⁇ sec at 25 ° C. was prepared. At this time, the film strength of the silicone resin was 5.5 MPa, the film elongation was 111%, and the hardness was 51.
- the silicone resin composition was applied to one side of the woven fabric by using a knife-on-air knife having a tip radius R of 1.2 mm, adjusting the base fabric tension to 550 N / m and the knife pushing amount to 2 mm. . Furthermore, it was cured at 190 ° C. for 2 minutes to obtain a coated base fabric having an application amount of 35 g / m 2 . The properties of the resulting coated base fabric were evaluated and are shown in Table 1. The obtained base fabric was impregnated with resin up to the non-coated surface, and the tensile strength was improved by 11% after coating.
- Example 3 Using the same raw yarn as in Example 1, through the same process, a woven fabric having a warp density of 51 / 2.54 cm, a weft density of 51 / 2.54 cm and a cover factor of 2,211 was obtained.
- the tensile strength of this base fabric was 699 N / cm in the warp direction and 716 N / cm in the weft direction.
- a solventless silicone resin composition having a viscosity of 8 Pa ⁇ sec at 25 ° C. was prepared. At this time, the film strength of the silicone resin was 5.2 MPa, the film elongation was 120%, and the hardness was 47.
- This silicone resin composition was applied to one side of the woven fabric by using a knife-on-air knife having a tip radius R of 0.3 mm, adjusting the base fabric tension to 650 N / m and the knife pushing amount to 2 mm. . Furthermore, it was cured at 190 ° C. for 2 minutes to obtain a coated base fabric having an application amount of 15 g / m 2 . The properties of the resulting coated base fabric were evaluated and are shown in Table 1. The obtained base fabric was impregnated with resin up to the non-coated surface, and the tensile strength was improved by 5% after coating.
- Example 4 A polyamide 66 multifilament yarn having an original yarn strength of 8.5 cN / dtex, a total fineness of 235 dtex, and 72 filaments was woven in a water jet loom as a plain weave. Next, after shrinkage processing with boiling water, drying finish was performed at 110 ° C. to obtain a woven fabric having a warp density of 73 / 2.54 cm, a weft density of 73 / 2.54 cm, and a cover factor of 2,238. The tensile strength of this base fabric was 492 N / cm in the warp direction and 493 N / cm in the weft direction.
- Example 2 a resin having the same composition as in Example 1 was adjusted on one side of the woven fabric with a knife having a tip radius R of 0.6 mm, a base fabric tension of 450 N / m, and a knife push-in amount of 5 mm. Applied. Furthermore, it was cured at 190 ° C. for 2 minutes to obtain a coated base fabric having an application amount of 25 g / m 2 . The properties of the resulting coated base fabric were evaluated and are shown in Table 1. The obtained base fabric was impregnated with resin up to the non-coated surface, and the tensile strength was improved by 5% after coating.
- Example 5 A polyamide 66 multifilament yarn having an original yarn strength of 8.3 cN / dtex, a total fineness of 350 dtex, and 108 filaments was woven in a water jet loom as a plain weave. Next, after shrinking with boiling water, it was dried at 110 ° C. to obtain a woven fabric having a warp density of 55 / 2.54 cm, a weft density of 55 / 2.54 cm, and a cover factor of 2,058. The tensile strength of this base fabric was 570 N / cm in the warp direction and 560 N / cm in the weft direction.
- Example 3 a resin having the same composition as that of Example 3 was adjusted on one side of the woven fabric with a knife having a tip radius R of 0.2 mm, a base fabric tension of 450 N / m, and a knife pushing amount of 3 mm. Applied. Furthermore, it was cured at 190 ° C. for 2 minutes to obtain a coated base fabric having an application amount of 35 g / m 2 . The properties of the resulting coated base fabric were evaluated and are shown in Table 1. The obtained base fabric was impregnated with resin up to the non-coated surface, and the tensile strength was improved by 7% after coating.
- Example 6 A polyester multifilament yarn having an original yarn strength of 7.2 cN / dtex, a total fineness of 570 dtex, and 192 filaments was woven in a water jet loom as a plain weave. Next, after shrinking with boiling water, it was dried at 110 ° C. to obtain a woven fabric having a warp density of 46 / 2.54 cm, a weft density of 46 / 2.54 cm, and a cover factor of 2,196. The tensile strength of this base fabric was 626 N / cm in the warp direction and 620 N / cm in the weft direction.
- Example 2 a resin having the same composition as that of Example 1 was adjusted on one side of the woven fabric using a knife having a tip radius R of 0.6 mm, a base fabric tension of 400 N / m, and a knife pushing amount of 4 mm. Applied. Furthermore, it was cured at 190 ° C. for 2 minutes to obtain a coated base fabric having an application amount of 25 g / m 2 . The properties of the resulting coated base fabric were evaluated and are shown in Table 1. The obtained base fabric was impregnated with resin up to the non-coated surface, and the tensile strength was improved by 5% after coating.
- the silicone resin composition was applied to one side of the woven fabric by using a knife-on-air knife with a tip radius R of 0.5 mm, adjusting the base fabric tension to 500 N / m and the knife push-in amount to 3 mm. . Furthermore, it was cured at 190 ° C. for 2 minutes to obtain a coated base fabric having an application amount of 25 g / m 2 . The properties of the resulting coated base fabric were evaluated and are shown in Table 1. The obtained base fabric was not impregnated with the resin up to the non-coated surface, and the tensile strength was not improved after coating.
- This silicone resin composition was applied to one side of the woven fabric by using a knife-on-air knife having a tip radius R of 0.3 mm, adjusting the base fabric tension to 650 N / m and the knife pushing amount to 7 mm. . Furthermore, it was cured at 190 ° C. for 2 minutes to obtain a coated base fabric having an application amount of 15 g / m 2 . The properties of the resulting coated base fabric were evaluated and are shown in Table 1. The obtained base fabric was impregnated with the resin up to the non-coated surface, but the tensile strength was not improved after coating.
- the coated fabric for airbags of the present invention maintains its strength even when the fineness is lowered. Therefore, even airbags that require particularly high internal pressure retention performance are excellent in quality and reliability, and can be stored compactly.
- the industrial contribution is significant because it has the advantage of reducing design constraints.
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- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
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- Woven Fabrics (AREA)
Abstract
Description
[1]合成繊維フィラメントから構成された織物の片面にシリコーン樹脂が塗布されてなるエアバッグ用コーティング基布であり、非コート面の経糸と緯糸の目合い部分に前記シリコーン樹脂が存在するエアバッグ用コーティング基布。
[2]コーティング後の基布の引張強度がコーティング前の基布の引張強度より5%以上高い[1]記載のエアバッグ用コーティング基布。
[3]前記シリコーン樹脂のコーティング前の粘度が15Pa・sec以下であり、該樹脂の膜強度が5MPa以上、膜伸度が150%以下、硬度が45以上である[1]又は[2]に記載のエアバッグ用コーティング基布。
[4]前記シリコーン樹脂の塗布量が5g/m2以上35g/m2以下である[1]~[3]のいずれかに記載のエアバッグ用コーティング基布。
[5]前記シリコーン樹脂の塗布方法がナイフオンエアー方式であり、その時のナイフの押し込み量が1~6mmである塗布方法により製造された、[1]~[4]のいずれかに記載のエアバッグ用コーティング基布。
[6]織物を構成するフィラメントの総繊度が200~600dtexである請求項[1]~[5]のいずれかに記載のエアバッグ用コーティング基布。
[7]織物のカバーファクターが1,800~2,500である[1]~[6]のいずれかに記載のエアバッグ用コーティング基布。
[8]エアバッグ用コーティング基布の製造方法であって、粘度が15Pa・sec以下、樹脂の膜強度が5MPa以上、膜伸度が150%以下、硬度が45以上であるシリコーン樹脂を、合成繊維フィラメントから構成された織物の片面のみに塗布することを特徴とするエアバッグ用コーティング基布の製造方法。
[9]前記シリコーン樹脂の塗布方法がナイフオンエアー方式であり、ナイフ押し込み量が1~6mmである[8]記載のエアバッグ用コーティング基布の製造方法。
[10]前記シリコーン樹脂の塗布量が5~35g/m2である[8]又は[9]に記載のエアバッグ用コーティング基布の製造方法。
本発明は、合成繊維フィラメントから構成された織物の片面にシリコーン樹脂が塗布されてなるエアバッグ用コーティング基布において、非コート面の経糸と緯糸の目合い部分に前記コーティングされたシリコーン樹脂が存在することを特徴とする。「シリコーン樹脂が存在する」とは、図1に示すようにコーティングを行っていない非コート面の経糸と緯糸の交点部すなわち目合い部にシリコーン樹脂を目視で確認できる状態のことをいう。具体的には走査型電子顕微鏡(SEM)を用いて非コート面の表面写真を撮影し、目視で判断することができる。経糸と緯糸の目合い部において非コート面側まで樹脂が存在することで、コーティング後の基布の引張強度をコーティング前の基布の引張強度より5%以上高くすることができた。本発明によって、比較的低繊度の合成繊維フィラメントからなるエアバッグ用基布であっても、高強度繊維を用いることなく引張強度を向上させることができ、品位の向上や軽量、コンパクト化に資する。
なお、カバーファクターCFは、下式により算出する。
CF=√(経糸の総繊度)×経糸密度+√(緯糸の総繊度)×緯糸密度
なお、総繊度の単位はdtex、織密度の単位は本/2.54cmである。
JIS L-1095 9.4.1記載の方法で測定する。
(2)フィラメント数
フィラメント糸条の断面写真よりフィラメント数を数える。
(3)織物の密度
JIS L-1096 8.6.1記載の方法で測定する。
(4)引張強度
JIS K6404-3記載の方法で測定する。
(5)樹脂の粘度
JIS K-7117記載の方法を用い、B型粘度計で測定する。
(6)樹脂膜強伸度
樹脂の0.5mmの一様な厚さの膜を作製し、熱風照射方式にて190℃2分間硬化処理した。作製した樹脂膜を、定速緊張型の引張試験機を用いチャック間10mmにて10mm/minの速度で引張試験を行い、破断時の強度及び伸度を測定した。
(7)硬度
ASTM D2240記載の方法を用い、ショアーAの硬さ計を用いて測定した。
(8)塗布量
樹脂を硬化させた後のコーティング布を正確に5cm角で採取し、ベース基布である繊維のみを溶かす溶剤(ポリアミド66の場合は、ヘキサフルオロイソプロパノール)に浸漬して基布を溶解させた。次に、不溶物であるシリコーンコート層のみを回収してアセトン洗浄を行い、真空乾燥後、試料の秤量を行った。なお、塗布量は、1m2あたりの質量(g/m2)で表した。
(9)非コート面樹脂含浸
コート布の非コート面の表面写真を任意に選んだ5箇所で撮影し、経糸と緯糸の交点部分4隅すべてで樹脂が確認出来た場合を○、すべてで確認出来なかった場合を×とした。
(10)コート前後引張強伸比
コート後の基布の引張強度測定値の経方向と緯方向を足した値をコート前の基布の引張強度測定値の経方向と緯方向を足した値で割って算出した数値を記載した。小数点3桁目を丸めた。
原糸強度が8.2cN/dtexで総繊度が470dtex、144フィラメントのポリアミド66マルチフィラメント糸を、平織りにてウォータージェットルームにて製織した。次いで、沸水にて収縮加工した後、110℃で乾燥仕上げをし、経密度46本/2.54cm、緯密度46本/2.54cm、カバーファクターが1,994の織物を得た。この基布の引張強度は、経方向が635N/cm、緯方向が658N/cmであった。
(A)ビニル基含有ジメチルポリシロキサン(重量平均分子量31000):78質量部
(B)メチルハイドロジェンポリシロキサン(重量平均分子量2800、ケイ素原子に結合する水素原子数:10個):5質量部
(C)乾式シリカ粒子:0.5質量%(シリコーン樹脂組成物に対して)
(日本アエロジル社製、AEROSIL(R) NX90;平均一次粒径:20nm、比表面積:90m2/g、トリメチルシラン処理品)
(D) エポキシ基を有する有機ケイ素化合物:1.1質量部
(3個のメトキシ基と1個のエポキシ基を有する、重量平均分子量:240)
(E) ケイ素原子結合ビニル基を有する有機ケイ素化合物:0.4質量部
(3個のメトキシ基と1個のビニル基を有する、重量平均分子量:150)
(F)架橋性シリコーン:末端トリメチルシラン/ビニルジメチルシラン=86/14モル比:14.5質量部
(G)白金触媒:20ppm(シリコーン樹脂組成物に対して)
(H) ベンガラ顔料:0.5質量部
原糸強度が8.0cN/dtexで総繊度が470dtex、72フィラメントのポリアミド66マルチフィラメント糸を、平織りにてウォータージェットルームにて製織した。次いで、沸水にて収縮加工した後、110℃で乾燥仕上げをし、経密度46本/2.54cm、緯密度46本/2.54cm、カバーファクターが1,994の織物を得た。この基布の引張強度は、経方向が638N/cm、緯方向が619N/cmであった。
実施例1と同様の原糸を用い、同様の工程を経て、経密度51本/2.54cm、緯密度51本/2.54cm、カバーファクターが2,211の織物を得た。この基布の引張強度は、経方向が699N/cm、緯方向が716N/cmであった。
原糸強度が8.5cN/dtexで総繊度が235dtex、72フィラメントのポリアミド66マルチフィラメント糸を、平織りにてウォータージェットルームにて製織した。次いで、沸水にて収縮加工した後、110℃で乾燥仕上げをし、経密度73本/2.54cm、緯密度73本/2.54cm、カバーファクターが2,238の織物を得た。この基布の引張強度は、経方向が492N/cm、緯方向が493N/cmであった。
原糸強度が8.3cN/dtexで総繊度が350dtex、108フィラメントのポリアミド66マルチフィラメント糸を平織りにてウォータージェットルームにて製織した。次いで、沸水にて収縮加工した後、110℃で乾燥仕上げをし、経密度55本/2.54cm、緯密度55本/2.54cm、カバーファクターが2,058の織物を得た。この基布の引張強度は、経方向が570N/cm、緯方向が560N/cmであった。
原糸強度が7.2cN/dtexで 総繊度が570dtex、192フィラメントのポリエステルマルチフィラメント糸を、平織りにてウォータージェットルームにて製織した。次いで、沸水にて収縮加工した後、110℃で乾燥仕上げをし、経密度46本/2.54cm、緯密度46本/2.54cm、カバーファクターが2,196の織物を得た。この基布の引張強度は、経方向が626N/cm、緯方向が620N/cmであった。
実施例2の織物に、(A)ビニル基含有ジメチルポリシロキサン(重量平均分子量31000):78質量部の代わりに、(A3)ビニル基含有ジメチルポリシロキサン(重量平均分子量45000):19質量部、(A4)ビニル基含有ジメチルポリシロキサン(重量平均分子量23000):59質量部添加し、また(C)の乾式シリカ粒子の添加量を14.6質量%に変更し、(F)成分を添加しない以外は実施例1の組成である、25℃における粘度が22Pa・secである無溶剤系シリコーン樹脂組成物を調合した。この時のシリコーン樹脂の膜強度は3.8MPa、膜伸度が367%、硬度が42であった。
実施例3の織物に、(A)ビニル基含有ジメチルポリシロキサン(重量平均分子量31000):78質量部の代わりに、(A3)ビニル基含有ジメチルポリシロキサン(重量平均分子量45000):9質量部、(A4)ビニル基含有ジメチルポリシロキサン(重量平均分子量23000):69質量部添加し、また(C)の乾式シリカ粒子の添加量を5.2質量%に変更した以外は実施例1の組成である、25℃における粘度が15Pa・secである無溶剤系シリコーン樹脂組成物を調合した。この時のシリコーン樹脂の膜強度は2.7MPa、膜伸度が415%、硬度が31であった。
実施例4と同一の織物、樹脂を用い、織物の片面に、先端部半径Rが0.6mmのナイフを用い、基布張力450N/m、ナイフ押し込み量を0.5mmに調整して塗布した。さらに、190℃で2分間硬化処理し、塗布量が28g/m2であるコーティング基布を得た。得られたコーティング基布の特性を評価し、表1に示した。得られた基布は、非コート面まで樹脂が含浸しておらず、コート後に引張強度が1%しか向上しなかった。
2 樹脂
3 基布
4 ベッド
5 樹脂
6 ナイフ
7 ナイフ押し込み量
Claims (10)
- 合成繊維フィラメントから構成された織物の片面にシリコーン樹脂が塗布されてなるエアバッグ用コーティング基布であり、非コート面の経糸と緯糸の目合い部分に前記シリコーン樹脂が存在するエアバッグ用コーティング基布。
- コーティング後の基布の引張強度がコーティング前の基布の引張強度より5%以上高い請求項1記載のエアバッグ用コーティング基布。
- 前記シリコーン樹脂のコーティング前の粘度が15Pa・sec以下であり、該樹脂の膜強度が5MPa以上、膜伸度が150%以下、硬度が45以上である請求項1又は2に記載のエアバッグ用コーティング基布。
- 前記シリコーン樹脂の塗布量が5g/m2以上35g/m2以下である請求項1~3のいずれか一項に記載のエアバッグ用コーティング基布。
- 前記シリコーン樹脂の塗布方法がナイフオンエアー方式であり、その時のナイフの押し込み量が1~6mmである塗布方法により製造された、請求項1~4のいずれか一項に記載のエアバッグ用コーティング基布。
- 織物を構成するフィラメントの総繊度が200~600dtexである請求項1~5のいずれか一項に記載のエアバッグ用コーティング基布。
- 織物のカバーファクターが1,800~2,500である請求項1~6のいずれか一項に記載のエアバッグ用コーティング基布。
- エアバッグ用コーティング基布の製造方法であって、粘度が15Pa・sec以下、樹脂の膜強度が5MPa以上、膜伸度が150%以下、硬度が45以上であるシリコーン樹脂を、合成繊維フィラメントから構成された織物の片面のみに塗布することを特徴とするエアバッグ用コーティング基布の製造方法。
- 前記シリコーン樹脂の塗布方法がナイフオンエアー方式であり、ナイフ押し込み量が1~6mmである請求項8記載のエアバッグ用コーティング基布の製造方法。
- 前記シリコーン樹脂の塗布量が5~35g/m2である請求項8又は9に記載のエアバッグ用コーティング基布の製造方法。
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EP14888155.0A EP3127759B1 (en) | 2014-03-31 | 2014-12-22 | Coated fabric for airbag |
CN201480075636.0A CN106029452B (zh) | 2014-03-31 | 2014-12-22 | 气囊用涂层基布 |
JP2016511329A JP6350650B2 (ja) | 2014-03-31 | 2014-12-22 | エアバッグ用コート基布 |
PL14888155T PL3127759T3 (pl) | 2014-03-31 | 2014-12-22 | Powlekana tkanina do poduszki powietrznej |
ES14888155T ES2721443T3 (es) | 2014-03-31 | 2014-12-22 | Tejido recubierto para airbag |
BR112016022862A BR112016022862B8 (pt) | 2014-03-31 | 2014-12-22 | Tecido revestido para airbag e método de produção do mesmo |
US15/300,311 US10889259B2 (en) | 2014-03-31 | 2014-12-22 | Coated fabric for airbag |
KR1020167026661A KR102286173B1 (ko) | 2014-03-31 | 2014-12-22 | 에어백용 코팅 기포 |
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CN108699763A (zh) * | 2016-03-16 | 2018-10-23 | 东洋纺株式会社 | 气囊用涂层基底织物及其制造方法 |
JP2022173039A (ja) * | 2021-05-06 | 2022-11-17 | ウォンプン コーポレーション | 防炎性が強化され、デジタル印刷が可能な防炎素材、及びその製造方法 |
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CN110997995B (zh) * | 2017-08-21 | 2022-05-31 | 东洋纺株式会社 | 安全气囊用织物、安全气囊用涂层织物和使用其的安全气囊 |
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2014
- 2014-12-22 ES ES14888155T patent/ES2721443T3/es active Active
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Cited By (13)
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EP3127759A1 (en) | 2014-03-31 | 2017-02-08 | Toyobo Co., Ltd. | Coated base fabric for airbags |
EP3392401A4 (en) * | 2015-12-16 | 2019-07-03 | Toyobo Co., Ltd. | COATED BASE FABRIC FOR INFLOW CUSHION AND METHOD FOR MANUFACTURING THE SAME |
CN108368672A (zh) * | 2015-12-16 | 2018-08-03 | 东洋纺株式会社 | 气囊用涂层基底织物及其制造方法 |
JPWO2017104529A1 (ja) * | 2015-12-16 | 2018-10-04 | 東洋紡株式会社 | エアバッグ用コーティング基布及びその製造方法 |
WO2017104529A1 (ja) * | 2015-12-16 | 2017-06-22 | 東洋紡株式会社 | エアバッグ用コーティング基布及びその製造方法 |
US20200024798A1 (en) * | 2015-12-16 | 2020-01-23 | Toyobo Co., Ltd. | Coated base fabric for airbag and method for manufacturing same |
US11060239B2 (en) | 2015-12-16 | 2021-07-13 | Toyobo Co., Ltd. | Coated base fabric for airbag and method for manufacturing same |
CN108699763A (zh) * | 2016-03-16 | 2018-10-23 | 东洋纺株式会社 | 气囊用涂层基底织物及其制造方法 |
JPWO2017159583A1 (ja) * | 2016-03-16 | 2019-01-24 | 東洋紡株式会社 | エアバッグ用コーティング基布およびその製造方法 |
EP3431653A4 (en) * | 2016-03-16 | 2019-09-04 | Toyobo Co., Ltd. | COATED BASE FABRIC FOR INFLATABLE SAFETY CUSHION AND METHOD FOR MANUFACTURING THE SAME |
US10940825B2 (en) | 2016-03-16 | 2021-03-09 | Toyobo Co., Ltd. | Coated base fabric for airbag and method for manufacturing same |
JP2022173039A (ja) * | 2021-05-06 | 2022-11-17 | ウォンプン コーポレーション | 防炎性が強化され、デジタル印刷が可能な防炎素材、及びその製造方法 |
JP7300758B2 (ja) | 2021-05-06 | 2023-06-30 | ウォンプン コーポレーション | 防炎性が強化され、デジタル印刷が可能な防炎素材、及びその製造方法 |
Also Published As
Publication number | Publication date |
---|---|
US20170136982A1 (en) | 2017-05-18 |
CN106029452B (zh) | 2020-06-05 |
PL3127759T3 (pl) | 2019-07-31 |
EP3127759A1 (en) | 2017-02-08 |
BR112016022862B8 (pt) | 2022-02-15 |
KR20160138066A (ko) | 2016-12-02 |
CN106029452A (zh) | 2016-10-12 |
EP3127759B1 (en) | 2019-02-06 |
ES2721443T3 (es) | 2019-07-31 |
JP6350650B2 (ja) | 2018-07-04 |
KR102286173B1 (ko) | 2021-08-06 |
EP3127759A4 (en) | 2017-11-29 |
BR112016022862A2 (ja) | 2018-05-15 |
BR112016022862B1 (pt) | 2021-01-12 |
JPWO2015151358A1 (ja) | 2017-04-13 |
US10889259B2 (en) | 2021-01-12 |
PT3127759T (pt) | 2019-05-14 |
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