CN1703550A - Coated airbag base fabric and airbag - Google Patents
Coated airbag base fabric and airbag Download PDFInfo
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- CN1703550A CN1703550A CN 200380100914 CN200380100914A CN1703550A CN 1703550 A CN1703550 A CN 1703550A CN 200380100914 CN200380100914 CN 200380100914 CN 200380100914 A CN200380100914 A CN 200380100914A CN 1703550 A CN1703550 A CN 1703550A
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Abstract
The invention relates to a coated base fabric for air bags which exhibits low air permeability and excellent heat resistance and is capable of being stored in a compact state and excellent in the adhesion between fabric and resin coating film; air bags made by using the coated base fabric; and a process for the production of the fabric. Specifically, the invention relates to a coated base fabric for air bags which consists of a fiber fabric coated with a resin on at least one surface, characterized in that at least part of the single yarns constituting the fabric is enclosed with the resin and at least part of the single yarns constituting the fabric is not enclosed with the resin; air bags characterized by being made by the use of the coated base fabric; and a process for the production of a coated base fabric for air bags, characterized by applying a resin solution having a viscosity of 5 to 20 Pa s (5,000 to 20,000cP) to a fiber fabric with a knife coater equipped with an acute-angle doctor knife at a contact pressure between the knife and the fabric of 1 to 15N/cm.
Description
Technical field
The present invention relates to have gas barrier property, heat resistance simultaneously concurrently, take in compactedness, and with the coated airbag base fabric of the cohesiveness excellence of resin coating and the air bag that constitutes by this base cloth.
Background technology
In recent years,,, developed various air bags, and its validity obtained people's understanding, promptly obtained practical application in order to guarantee occupant's safety when various vehicles when particularly automobile has an accident.But people still demand use the environment of air bag not limited, and its mechanical performance still keeps stable air bag under harsh and unforgiving environments such as high temperature or low temperature.
In the past, in order to improve heat resistance, anti-flammability, gas barrier property etc., air bag is by using 334-1, the elastomer resin of synthetic rubber such as coating, lamination chlorobutadiene, chlorosulfonation alkene, siloxanes etc. on the plain cloth that the nylon 66 of 112 dtexs or nylon 6 long filaments are made, obtain base cloth, with this base cloth cutting, be sewn into bag and form.
When for example coating chlorobutadiene elastomer resin is made base cloth on the long filament cloth and silk, consider, must on cloth and silk, be coated with 90-120g/m from the angle of heat resistance and anti-flammability
2, thickness thickens, and has produced the problem that packaging volume increases aspect taking in property.Compare with the chlorobutadiene elastomer resin when using, during the more excellent silicone elastomer resin of heat resistance, cold resistance, coating weight is 40-60g/m
2, can realize lightweight, simultaneously sizable raising is also arranged aspect the compactedness taking in, but also not enough, in addition, the problem that is difficult to fold when being taken in, the bag packing and folding is arranged.
Therefore, in recent years, in order to address the above problem, people have studied the slim silicon coating base cloth that reduces resin-coated amount, a kind of air bag is for example proposed, it is characterized in that, with respect to the manufacturing that constitutes fabric with yarn part 1.0, elastomer resin with 3.0 or above Film Thickness Ratio concentrate and be present in fabric web eye portion (for example with reference to No. 2853936 communiques of Japan's special permission mat woven of fine bamboo strips).But present situation is, though for taking in compactedness improvement has been arranged, still is difficult to enough for the cohesiveness aspect of resin coating and fabric.In addition, also proposed the manufacture method of a kind of air bag, it is characterized in that the water serial emulsion of impregnation silicone resin in filament yarn fabric makes this silicone resin at 0.1g/m with fabric
2-10g/m
2Scope adhere to (for example speciallyying permit communique No. 3206758) with reference to Japan.But present situation is, though in the improvement that has aspect the cohesiveness of resin coating and fabric to a certain degree, gas barrier property, take in aspect the compactedness still not enough.
Summary of the invention
The present invention is in view of the shortcoming of described present air bag, provide and have gas barrier property, heat resistance simultaneously concurrently, take in compactedness, and, also provide the manufacture method of this coated airbag base fabric with the coated airbag base fabric of the cohesiveness excellence of resin coating and the air bag that constitutes by this base cloth.
The present invention has adopted following content in order to solve above-mentioned problem.
That is, coated airbag base fabric of the present invention is characterised in that: the one side at least of fiber fabric is covered by resin, and at least a portion monofilament that constitutes this cloth and silk wrapped up by this resin, and at least a portion monofilament that constitutes this cloth and silk is not wrapped up by this resin.
Air bag of the present invention is characterised in that and has used described coated airbag base fabric.
The manufacture method of coated airbag base fabric of the present invention is characterised in that: the coating blade that uses the acute angle blade, by the scraper type coating machine, pressing with contacting of this cloth and silk at coating blade is in the scope of 1-15N/cm, with viscosity at 5-20Pas (5,000-20,000cP) resin liquid in the scope is applied on the fiber fabric.
Description of drawings
Fig. 1 is the cross-section model of coated airbag base fabric of the present invention.
Fig. 2 is the cross-section model of present coated airbag base fabric.
Fig. 3 is the cross-section model of the airbag base fabric that obtained by present impregnation method.
Fig. 4 is the key diagram of the assay method of expression permeability.
Fig. 5 is the key diagram of the method for folding of air bag in the test of taking in property of expression.
Fig. 6 is the key diagram of the captured cloth and silk cross section place of expression scanning electronic microscope.
Fig. 7 is the key diagram of the coating process of expression resin.
The specific embodiment
Fiber fabric of the present invention uses nylon 66, nylon 6, nylon 12, nylon 46, the copolymer of nylon 6 and nylon 66, nylon 6 and poly-alkane glycol, the polyamide fiber that copolymerization such as dicarboxylic acids or amine forms, polyethylene terephthalate, the homopolyester fibre of polybutylene terephthalate etc., constitute the sour composition and the M-phthalic acid of polyester repetitive, the polyester fiber that copolymerization such as aliphatic dicarboxylic acid such as 5-sodiosulfoisophthalic acid or adipic acid form, aramid fibre to penylene terephthalamide and aryl oxide copolymerization representative, rayon fiber, the polysulfones series fiber, superhigh molecular weight polyethylene fibers and have the synthetic fabrics that the macromolecule configuration fiber based on the island structure of above-mentioned synthetic fiber constitutes.Wherein preferred polyamide fiber, dacron fibre are considered from the resistance to impact aspect, further preferred nylon 66, nylon 6.Described fiber can contain for the productive rate of the manufacturing process that improves raw yarn, manufacturing procedure or characteristic and normally used various additive.For example can contain heat stabilizer, antioxidant, light stabilizer, smooth agent, antistatic additive, plasticizer, thickener, pigment, fire retardant etc.
Coated airbag base fabric of the present invention must be that at least one face of fiber fabric is covered by resin.By at least one face is covered with resin, can make it have gas barrier property, the high temperature nitrogen that is produced by inflator is remained in this cloth and silk.The resin that uses among the present invention need not to specify, the wherein preferred resin with heat resistance, cold resistance, anti-flammability that uses.Described resin for example has silicone resin, polyamide-based resin, polyurethane resin, fluorine resin etc.Wherein, silicone resin is excellent preferred especially because of heat resistance, cold resistance, gas barrier property.It is silicone resin that described silicone resin uses diformazan base system silicone resin, ethylene methacrylic base system silicone resin, methylbenzene base system silicone resin, fluorine.Preferred this resin contains flame-retardant compound.That described flame-retardant compound can use is brominated, the halogen compounds of chlorine etc., particularly halo cycloalkane, platinum compounds, antimony oxide, cupric oxide, titanium oxide, phosphorus compound, thiocarbamide based compound, carbon, cerium, silica etc., wherein halogen compounds, platinum compounds, cupric oxide, titanium oxide, carbon can not hinder the characteristics such as heat resistance that silicone resin has, can improve anti-flammability, therefore more preferably.In addition, described silicone resin also can suitably use any one in solvent system, water system, the aqueous dispersion resin, to the influence of environment and the easy equipment aspect consideration that need not to use antiknock device, not using the solvent-free of solvent is that silicone resin is preferred during wherein from use.
For coated airbag base fabric of the present invention, at least a portion monofilament that importantly constitutes fiber fabric is wrapped up by resin, and at least a portion monofilament that constitutes this fabric is by resin parcel (with reference to Fig. 1).Here said monofilament is meant when for example fiber fabric is made of multifilament, constitutes 1 monofilament of this multifilament.At least a portion monofilament is wrapped up by resin in the monofilament that constitutes this cloth and silk by making, the cohesiveness of this cloth and silk and resin coating improves, at least a portion monofilament is not wrapped up by resin in the monofilament that constitutes this cloth and silk by making in addition, can obtain to keep the coated airbag base fabric of this cloth and silk flexibility.
As shown in Figure 2, the present coated airbag base fabric that obtains with rubbing method is owing to the tunicle that resin 2 is arranged on the cloth and silk surface, so resin 2 does not wrap up the monofilament 1 that constitutes this cloth and silk.As a result, though gas barrier property is good, the poor adhesion of this cloth and silk and this resin coating.In addition, as shown in Figure 3, the airbag base fabric that obtains with the impregnation method at present, resin 2 is distributed in the cloth and silk, that is to say, though nearly all monofilament is all wrapped up by resin 2, is difficult to form resin molding in the cloth and silk part (intersection point of warp and parallel) that interweaves.Air is leaked by the cloth and silk part that interweaves easily as a result, thereby gas barrier property is poor, because nearly all monofilament is all wrapped up by resin, makes that the flexibility of cloth and silk is impaired in addition.Relative therewith, the present invention is in order to remedy at present the shortcoming of the base cloth that is obtained by rubbing method and impregnation method, the configuration of resin in cloth and silk as shown in Figure 1, basically form the tunicle of resin 2 on the cloth and silk surface, make it to have gas barrier property thus, and resin 2 parcel constitutes at least a portion monofilament in the monofilament 1 of cloth and silks, can improve the cohesiveness of resin coating and cloth and silk thus, remaining monofilament is not wrapped up by resin, can not damage the flexibility of airbag base fabric thus.
The ratio of above-mentioned monofilament with resin parcel, in the 3-20% scope, this can make flexibility two aspects of the cohesiveness of cloth and silk and resin and base cloth all excellent, thereby preferred with respect to whole monofilament, further preferred 5-15%.This ratio was less than 3% o'clock, and the flexibility of base cloth is good, but the poor adhesion of cloth and silk and resin.In addition, when this ratio 20% was big, the cohesiveness of cloth and silk and resin was good, but the flexibility of airbag base fabric is impaired.
In addition, this resin penetration is in the 10-70% scope of cloth and silk thickness, and this can make flexibility two aspects of the cohesiveness of cloth and silk and resin and airbag base fabric all excellent, thereby preferred, in the further preferred 15-50% scope.Here, the ratio with respect to the infiltration of cloth and silk thickness is meant that resin penetration arrives the ratio of the inside of the multifilament that constitutes cloth and silk.That is, be meant constituting on the multifilament cross section of cloth and silk, by surface seepage to the distance 3 of inside value (with reference to Fig. 4) divided by height 4 gained of multifilament.The surface is wrapped up by resin.Resin is referred to the distance of the penetralia part that is penetrated into to inner distance by surface seepage.
Above-mentioned permeability is less than 10%, and then the flexibility of airbag base fabric is good, but the poor adhesion of cloth and silk and resin.Bigger than 70%, then the cohesiveness of cloth and silk and resin is good, but the flexibility of airbag base fabric is impaired.
In addition, the resin adhesion amount is at 5-30g/m
2Scope in, this thickness, weight, gas barrier property at base cloth or take in aspect the compactedness preferred, further preferably at 5-20g/m
2Scope in, this is useful for taking in compactedness.The adhesion amount of resin is less than 5g/m
2, then be difficult to cover the cloth and silk surface fully with resin molding, air takes place easily to be leaked.In addition, compare 30g/m
2Many, then preferred aspect gas barrier property, but the resin molding thickening on cloth and silk surface, the amount of resin in the cloth and silk increases, and the flexibility of airbag base fabric is impaired, thus take in aspect the compactedness not preferred.
The fiber number of the employed yarn for weaving purpose of synthetic fiber that constitutes airbag base fabric among the present invention is preferably in 90-600 dtex scope, and further preferably in 150-470 dtex scope, this harmonious aspect from mechanical strength, thickness, weight is considered preferred.That is,, then consider preferably, but mechanical strength is not enough from thickness, weight angle less than 90 dtexs; Surpass 600 dtexs, then thickness, weight increase, and are wanting in taking in property.In addition, the filament fiber number of the fiber of described formation yarn for weaving purpose is preferably in 1-6.5 dtex scope, further preferably in 2-4.5 dtex scope, this taking in property, and the cohesiveness of resin aspect good.Less than 1 dtex, then the productive rate of existence silk is easy to the problem of variation; Surpass 6.5 dtexs, fabric thickening then, with base cloth when folding, the base cloth bounce-back is strong with air bag, and taking in property is poor.In addition, filament number is in above-mentioned scope, and then during coating resin, resin is penetrated between the monofilament easily, and resin wraps up monofilament easily.
In addition, employed its monofilament cross sectional shape of silk has more than and is limited to circle, also can be flat.Using the major cross-sectional axis and the ratio of minor axis is the silk of the flat cross section of aspect ratio in the 1.5-6 scope, can make the reduced thickness of base cloth, makes the raising of taking in property.It is oval that the flat cross section silk is generally, as long as but satisfy aspect ratio in the 1.5-6 scope, also can be oval shape in addition.For example, resembling the self-evident of rectangle, rhombus, the such left-right symmetry type of cocoon shape, also can be left and right sides asymmetrical type, perhaps can be their combination, can also be with the above-mentioned basic model that is shaped as, and the part of projection, depression or part hollow is arranged.Particularly, ellipse is made in the monofilament cross section, this can make the surface smoothing of cloth and silk, and the space that is produced between the silk that constitutes cloth and silk is reduced, fill up this space and when being coated with, only need a low amounts of resin to get final product, therefore can realize low coating weight, preferred aspect taking in property, cost.
In addition, consider that preferred employed silk is untwisted yarn from the cohesiveness aspect of cloth and silk and resin.When silk was twisted, owing to be with the multifilament boundling, thereby during coating resin, resin was difficult to be impregnated between the monofilament, and resin is difficult to wrap up monofilament as a result, and is not preferred aspect the cohesiveness of cloth and silk and resin.In addition, fabric face concavo-convex increase in twisting back for making the concavo-convex of resin landfill fabric face, needs more amount of resin, and base cloth weight increases, taking in property variation not only, and amount of resin also increases, so cost increases.
In addition, as the structure of cloth and silk, can use plain weave, twill, satin weave and their variation, multiaxis to etc. fabric, non-weaving cloth, spun-bonded fabric, wherein, from respectively considering of mechanical excellent, fabric cost and air bag to impartial extensibility aspect, preferred especially plain cloth.Described fabric is not to be necessary for the symmetry tissue, can be asymmetric tissue yet.Break or the fabric of empty plumage tissue etc. is organized different fabric etc. for anti-one of in the asymmetric diverse fabric of one of organizing in the different fabric of the radical that for example can use plain weave fabric's middle longitude and parallel, the graticule silk described here, the longitude and latitude.
Weaving the loom of the fabric that constitutes base cloth of the present invention can suitably be selected by the various looms that are used for weaving industrial fabric, for example can select from shuttle loom, water jet looms (WJL), air-jet loom (AJL), Rapier looms etc.Wherein, consider, preferably use water jet looms (WJL) from the residual finish of base cloth that reduces to influence the air bag anti-flammability and the angle of productive rate.
Aspect anti-flammability, the residual oil mass of preferred coated airbag base fabric of the present invention is 0.1 weight % or following.In addition, the mensuration of residual oil mass is carried out in accordance with the following methods in the base cloth that is covered by resin.
Gather about 10g fabric or base cloth test portion, in 105 ℃ air drier, placed 1 hour 30 minutes, measure its weight (S) with electronic balance then, in the conical flask of packing into.Then, will pour conical flask into, stir 10 minutes, extraction finish composition with vibrating machine with the 120ml n-hexane of graduated cylinder weighing.By removing the base cloth test portion in the solution after the extraction, measure the 100ml extract with graduated cylinder, in the round-bottomed flask of the weight of packing into known (W0).Then remove n-hexane by recovery in the flask contents with Soxhlet extractron liquid, with round-bottomed flask at 5mmHg, 25 ℃ vacuum drier inner drying 1 hour.Change over to afterwards and place cooling 15 minutes in the vacuum desiccator, measure the weight (W1) of round-bottomed flask, by the oil mass in the following formula calculating base cloth.
In addition, for the residual oil mass that makes base cloth is 0.1 weight % or following, residual oil mass is 0.1 weight % or following in the synthetic fabrics before the preferred covering resin.Residual oil mass is 0.1 weight % or following in the fabric by making, and can reduce the residual oil mass of base cloth, and is preferred aspect anti-flammability.
The middle body thickness T 1 of coated airbag base fabric of the present invention is preferably 0.9≤T1/T2 with the relation of the thickness T 2 of coating end, more preferably 0.95≤T1/T2.T1/T2 was than 0.9 hour, the uneven thickness of the bag after cutting is made increases, when launching, bag can not stop that rapidly occupant's high speed is launched poor performance respectively to launching equably.In addition, high-temperature gas impacts bag unevenly during expansion, thereby bag bears big thermal damage sometimes, thereby not preferred.
The coated airbag base fabric of the present invention preferably pass of the coating width C of the base cloth width W of this base cloth and coating resin is 0.95≤C/W≤0.99.Than 0.95 hour, the loss during the bag cutting was big, is wanting in cost performance.When bigger than 0.99, in the HEAT SETTING after resin-coated, the part at clamping base cloth two ends also becomes resin-coated part, and this is the reason that gauffer occurs, is wanting in quality.
The air permeability of coated airbag base fabric of the present invention is measured according to the method (fluid (air) is pressed 125Pa) of JIS L1096A method defined, is preferably 0.01cc/cm
2/ second or below.In addition, when fluid (air) was adjusted to the pressure circulation of 19.6kPa, the air permeability that the air mass flow that preferred mensuration is passed through obtains was 1cc/cm
2/ second or below.By being adjusted to described air permeability, make the scope of design of air bag at various positions become wide, can in requiring the purposes of extremely low air permeability, inflation curtain type gas bag, preceding knee bag, Based Intelligent Control air bag etc. preferably use.
In addition, consider that from the lightweight aspect weight per unit area of coated airbag base fabric of the present invention is 300g/m
2Or below, more preferably 250g/m
2Or below.Consider that from taking in the compactedness aspect thickness is preferably 0.35mm or following, further preferred 0.33mm or following about stiffness, considers that from taking in the compactedness aspect preferred warp direction and weft direction all are 100mm or following.In addition, the taking in property of air bag and resistance to fracture aspect are considered when using as air bag, the TENSILE STRENGTH of preferred airbag base fabric be 300N/cm or more than, elongation at break be 15% or more than, tearing strength be 100N or more than.
In addition, the high-temperature gas of imagination during airbag deployment has thermal damage etc. to base cloth, and the anti-flammability that preferred coated airbag base fabric of the present invention is measured according to FMVSS302 was less than 100mm/ minute.Further preferably less than 80mm/ minute.
In addition; coated airbag base fabric of the present invention can be used as the driver's seat with air bag, copilot seat with air bag, back row seats with air bag, side position with air bag, inflation curtain type gas bag, preceding knee with uses such as air bags; also can be applicable to be fit to hit impact protection and protect with pouch, foot's protection with headgear, child and use functional positions such as bag, as long as its shape, capacity etc. satisfy required condition with bag, safety belt.
Coated airbag base fabric of the present invention can followingly be made: with the coating blade of acute angle blade, by the scraper type coating machine, press in the scope of 1-15N/cm contacting of coating blade and this cloth and silk, with viscosity at 5-20Pas (5,000-20,000cP) resin liquid in the scope is applied on the fiber fabric.
The viscosity of resin liquid is meant the Z8803 according to JIS, with the viscosity of Type B viscosity apparatus mensuration.(5, in the time of 000cP), viscosity is low excessively, is not suitable for blade coating, and resin penetration is to base cloth inside, and not only low-permeable is poor, and in order to realize low-permeable, coating weight increases, and is bad aspect taking in property less than 5Pas for this viscosity.On the contrary, (20, when 000cP) big, then viscosity is too high, is difficult to reduce the coating weight (thin and coating equably) of resin, and taking in property is bad, and cost is also high, and resin liquid is difficult to be penetrated between the monofilament that constitutes cloth and silk, and resin can not fully wrap up monofilament than 20Pas.
Consider the low coating weight of resin and the resin permeability to cloth and silk, coating process adopts knife coating.Knife coating has knife-over-roll coating, knife-over-roll band to be coated with method, floating scraper method, from the low coating weight and the resin of resin the permeability of cloth and silk is considered, preferably uses the floating scraper method.
In order to realize low coating weight, employed coating blade uses the coating blade of acute angle blade in the coating.The shape of coating blade can be used Arc scraper or slabstone scraper, the permeability of cloth and silk is considered preferred slabstone scraper from the low coating weight and the resin of resin.
Make resin to a certain degree to be penetrated in the cloth and silk, constitute the monofilament of cloth and silk, the most important thing is the contact pressure of coating blade, need to contact pressure and be adjusted in the scope of 1-15N/cm cloth and silk in order to make the resin parcel.When this contact was pressed less than 1N/cm, contact was pressed low, and resin is difficult to be penetrated in the cloth and silk, and resin can't fully wrap up the monofilament that constitutes cloth and silk.In addition, be coated with more amount of resin, then base cloth weight increases, and takes in compactedness and is easy to variation.On the contrary, when this contact pressure ratio 15N/cm is big, the operation trafficability characteristic that becomes cloth and silk goes wrong, promptly, the multifilament that constitutes cloth and silk is not only caused quality variation by the reason of scraper cutting generation single wire fracture, also is difficult to cover the cloth and silk surface with resin molding, can't obtain target resin coating weight, gas barrier property is bad.As making this contact be pressed in method in the above-mentioned scope, when for example adopting the floating scraper method, by coating blade the depth of invasion of cloth and silk is regulated, this moment with coating blade to the relative position of cloth and silk be adjusted to 1-5cm satisfy aspect the above-mentioned contact press strip spare preferred.Relative position 8 described here is meant with respect to coating blade and inserts preceding base cloth horizontal direction 7, will be coated with the position (with reference to Fig. 7) that fabric cutter 10 vertically inserts base cloth 9.
In addition, the base cloth Tension Control during with coating is coated with in the scope of 000N/m at 500-3, this can improve fabric temporarily when coating the limit of collapsing, and the control coating width, thereby preferred.Base cloth warp tension ratio 500N/m hour, the limit of collapsing of fabric does not improve, and can't fully guarantee coating width.In addition,, when 000N/m is big, can't apply uniform tension force to the width of fabric direction sometimes, and the contraction when making because of bag causes the DIMENSIONAL STABILITY variation than 3, thus bad.
In addition, the refining typing processing before the coating is in order to alleviate the limit of collapsing of base cloth, to make coating more successfully carry out implementing, among the present invention, be preferably 500-1 with base cloth tension force, and therefore 500 high-tension coating resin can reduce the limit of collapsing and be coated with.Therefore, consider, preferably do not implement refining typing processing, use the fabric after grey cloth or grey cloth are finalized the design from the aspect that reduces cost.
Embodiment
Further describe the present invention by the following examples.Various evaluations among the embodiment are carried out according to following method.
The fiber that is wrapped up by resin accounts for the ratio (encapsulation ratio) of all fibres that constitutes base cloth:
Take the section photo of fabric under the following conditions by scanning electronic microscope (SEM), counting constitutes in the monofilament of 1 multifilament with the monofilament of resin parcel, represents with following formula.
(with the monofilament number of resin parcel)/(constituting the monofilament number of 1 multifilament) * 100 (%)
Permeability: take the section photo of cloth and silk under the following conditions by scanning electronic microscope (SEM), measure by surface seepage, represent with following formula to the distance of cloth and silk inside and the height of multifilament.
(resin is by the distance of surface seepage to cloth and silk inside)/(height of multifilament) * 100%
Weight per unit area (resin adhesion amount): obtain according to JIS L1096 (8.4.2 method).
Thickness: obtain according to JIS L1096 (8.5 method).In addition, the measured value of the middle body of base cloth is following to be obtained: the base cloth broad ways is divided into 3 parts, measures the thickness of 5 points of a base cloth in middle in these 3 parts, obtain by its mean value.In addition, following the obtaining of measured value of coating end: at interval respectively get 3 points to the inboard of base cloth with 1cm by the end that is coated with, obtain by the mean value of 6 points in two ends.
Residual oil mass: get about 10g fabric or base cloth test portion, in 105 ℃ air drier, placed 1 hour 30 minutes, measure its quality (S), the conical flask of packing into electronic balance then.Then, will pour conical flask into, stir 10 minutes, extraction finish composition with vibrating machine with the 120ml n-hexane that graduated cylinder is measured.By removing the base cloth test portion in the solution after the extraction, get the 100ml extract with graduated cylinder, pour in the round-bottomed flask of weight known (W0).Then remove n-hexane by recovery in the flask contents with Soxhlet extractron liquid, with round-bottomed flask at 5mmHg, 25 ℃ vacuum drier inner drying 1 hour.Change over to afterwards and place cooling 15 minutes in the vacuum desiccator, measure the weight (W1) of round-bottomed flask, by the oil mass in the following formula calculating base cloth.
TENSILE STRENGTH: according to JIS L1096 (8.12.1A method), the fracture strength when measuring with fabric width 3cm, the stretching in 15cm, draw speed 200mm/ minute of stretching extracting interval.
Elongation at break: according to JIS L1096 (8.12.1A method), the elongation at break when measuring with fabric width 3cm, the stretching in 15cm, draw speed 200mm/ minute of stretching extracting interval.
Tearing strength: according to JIS L1096 (8.15.2A-2 method), the tearing strength when obtaining with stretching in draw speed 200mm/ minute.
Stiffness: obtain by JIS L1096 (8.19.1A method).
Air permeability: according to JIS L1096 (the 8.27.1A method: fluid (air) is pressed 125Pa), the pressure that fluid (air) is adjusted to 19.6kPa makes its circulation, and the air mass flow of passing through in the time of is thus obtained.
The cohesiveness of resin: according to JIS L6328 (5.3.8 method), resin molding had or not and peels off when research rubbing number of times was 500 times.
Anti-flammability: measure according to FMVSS-302.
Viscosity:, under the condition of 25 ℃ of thermostat temperature, measure with the Type B viscosity apparatus according to JIS Z8803 (8).
Take in compactedness: the circular cloth that cuts 2 diameter 725mm with pressing from airbag base fabric, superpose 3 of identical cloth circular reinforcement cloth that constitute, diameter 200mm of the central authorities of the circular cloth of a slice therein, be 1 by the upper thread bottom line, the suture of 400dtex nylon 66 fiber, make the line of diameter 110mm, 145mm, 175mm with sewing machine for covering chain stitch, the hole of reserving diameter 90mm is as the inflator installing hole.Again by the position of central part along oblique line directions in 255mm, 1 identical cloth circular reinforcement cloth that constitute, diameter 75mm on the contrary superposes, be 1 by the upper thread bottom line, the suture of 400dtex nylon 66 fiber, make the line of diameter 50mm, 60mm with sewing machine for covering chain stitch, the air vent that two places leave diameter 40mm hole is set.
Reinforcement cloth one side that then should circle cloth outwardly, to depart from 45 degree with small beam overlapping with the circular cloth of another sheet, be 1 by the upper thread bottom line, the suture of 400dtex nylon 66 fiber, make the circumference of diameter 700mm, 710mm with double-thread overlock sewing machine, then bag is turned over, make the air bag of 60L capacity.
The air bag of gained 60L capacity is parallel with CD axle two direction of principal axis folding along the AB axle shown in Fig. 5 (1).Shown in Fig. 5 (2), at first folding by the base cloth end of B direction, then folding by this folding base cloth end to the B direction at 200mm line 6 to the A direction at 270mm line 5, again according to this method, folding by further folding base cloth end to the A direction at the 130mm line.With this folding base cloth symmetrically, folding to the B direction at the 270mm line, then folding to the A direction, folding at 130mm again to the B direction at 200mm by the base cloth end of other end A direction.Then, folding to the D direction by the base cloth end of C direction at the 270mm line, then folding to the C direction at 105mm, folding to the C direction at 75mm again, making bag is 150mm * 150mm.Equally, with this folding base cloth symmetrically, folding to the C direction at the 270mm line, then folding to the D direction, folding in 75mm alignment D direction again at 105mm by the base cloth end of other end D direction.This folding bag is applied the load of 10N, measure the thickness of bag this moment.Shed afterwards and cut out lotus, measure the thickness of bag after 1 minute.
The shooting condition of scanning electronic microscope (SEM):
To make S-3500N type scanning electronic microscope with Hitachi in the section part of the cloth and silk of position shown in Figure 6 cutting, take with 200 times of multiplying powers, 640 * 480 resolutions, 80/100 second sweep speed.
Coverage coefficient: the warp total fiber number of base cloth is D
1(dtex), to knit density be N to warp
1(root/2.54cm), parallel total fiber number are D
2(dtex), to knit density be N to parallel
2(during root/2.54cm), by (D
1* 0.9)
1/2* N
1+ (D
2* 0.9)
1/2* N
2Formula obtain.
In addition, the silk that uses among the embodiment adopts the silk that is made by following method for making.
Use the extruded type spinning machine, with 25 ℃ down 98% sulfuric acid relative viscosities be that 3.7 66 of nylon carry out melt-spun under 295 ℃.Each spinning machine uses the different respectively various spinneretss of flatness, shape and hole count, spins strand by the filament spinning component with this spinnerets, makes the strand that the air bag precursor is 470dtex, 350dtex and 235dtex in the direct spinning stretching combined production process.
Use the circular cross-section long filament of total fiber number 470dtex, 72 monofilament, intensity 8.4cN/dtex, percentage elongation 22%, aspect ratio 1.0, non-twist nylon 66 fiber, use water jet looms, to be set at the 70cN/ root through line tension, the density of knitting of warp and parallel all is adjusted to 46/2.54cm, obtains tabby fabric.Then use the slabstone scraper, being coated with this fabric of normal direction coating viscosity by floating scraper is that (12,000cP) solvent-free is methyl ethylene silicone resin liquid to 12PaS, makes this fabric remain 9N/cm with the pressure that contacts of this slabstone scraper, and the resin adhesion amount is 15g/m
2, carry out 2 minutes vulcanizing treatment at 190 ℃ then, obtain coated airbag base fabric.
The property list of above-mentioned gained airbag base fabric is shown in the table 1.The gas barrier property of this airbag base fabric, bag are taken in compactedness, excellent in flame retardance, and the cohesiveness of resin is also excellent.
Comparative example 1
Be coated with, fabric pressed with contacting of slabstone scraper remain 0.8N/cm, making the resin adhesion amount is 15g/m
2, obtain coated airbag base fabric in addition similarly to Example 1.
The property list of above-mentioned gained airbag base fabric is shown in the table 1.Gas barrier property, the bag of this airbag base fabric taken in compactedness, anti-flammability is no problem, but the poor adhesion of resin.
Comparative example 2
To 66 twisting of carrying out 100T/m of nylon of in embodiment 1, using, be coated with conma coating machine (fabric is pressed with contacting of conma and is 0N/cm), making coating weight is 15g/m
2, in addition, obtain coated airbag base fabric similarly to Example 1.
The property list of above-mentioned gained airbag base fabric is shown in the table 1.Gas barrier property, the bag of this airbag base fabric taken in compactedness, anti-flammability is no problem, but the poor adhesion of resin.
Use total fiber number 350dtex, 96 monofilament, intensity 8.4cN/dtex, percentage elongation 22%, aspect ratio 3.0, non-twist nylon 66 fiber flat cross section long filament, use water jet looms, to be set at the 100cN/ root through line tension, the density of knitting of warp and parallel all is adjusted to 59/2.54cm, obtains tabby fabric.Then use the slabstone scraper, being coated with this fabric coating viscosity of normal direction by floating scraper is 8PaS (8, the methyl ethylene silicone resin liquid of dilution with toluene 000cP) (the solid-state part of resin is 80%) makes this fabric press with contacting of this slabstone scraper and remains 2N/cm, and making the resin adhesion amount is 20g/m
2, 130 ℃ of dryings 1 minute, carry out 2 minutes vulcanizing treatment then at 200 ℃, obtain coated airbag base fabric.
The property list of above-mentioned gained airbag base fabric is shown in the table 1.The gas barrier property of this airbag base fabric, bag are taken in compactedness, excellent in flame retardance, and the cohesiveness of resin is also excellent.
Comparative example 3
Is 25PaS (25 with conma coating machine (fabric is pressed with contacting of conma and is 0N/cm) to the tabby fabric coating of embodiment 2 gained viscosity, the methyl ethylene silicone resin liquid of dilution with toluene 000cP) (the solid-state part of resin is 90%), making the resin adhesion amount is 35g/m
2, 130 ℃ of dryings 1 minute, carry out 2 minutes vulcanizing treatment then at 200 ℃, obtain coated airbag base fabric.
The property list of above-mentioned gained airbag base fabric is shown in the table 1.Gas barrier property, the anti-flammability of this airbag base fabric are no problem, but bag is taken in the poor adhesion of compactedness, resin.
Comparative example 4
Be coated with, fabric pressed with contacting of slabstone scraper remain 17N/cm, making the resin adhesion amount is 4g/m
2, in addition, obtain coated airbag base fabric similarly to Example 2.
The property list of above-mentioned gained airbag base fabric is shown in the table 1.It is no problem that the bag of this airbag base fabric is taken in compactedness, but fabric face does not form continuous resin coating, thereby gas barrier property is poor, and in addition, the cohesiveness of anti-flammability, resin is also poor.
Use total fiber number 235dtex, the circular cross-section long filament of 72 monofilament, intensity 8.4cN/dtex, percentage elongation 24%, aspect ratio 1.0, non-twist nylon 6 fiber, use air-jet loom, to be set at the 90cN/ root through line tension, the density of knitting of warp and parallel all is adjusted to 76/2.54cm, obtains tabby fabric.Then this fabric was soaked 3 minutes in 80 ℃ of tepidariums that contain 0.5g/l sodium alkyl benzene sulfonate and 0.5g/l soda ash, then 130 ℃ of dryings 2 minutes, then 180 ℃ of HEAT SETTING 1 minute.Re-use the slabstone scraper, the fabric coating viscosity that is coated with after this HEAT SETTING of normal direction by floating scraper is 10PaS (10, aqueous polyurethane resin liquid 000cP) (the solid-state part of resin is 50%) makes this fabric press with contacting of this slabstone scraper and remains 6N/cm, and making the resin adhesion amount is 20g/m
2, 130 ℃ of dryings 1 minute, obtain coated airbag base fabric then.
The property list of above-mentioned gained airbag base fabric is shown in the table 1.The gas barrier property of this airbag base fabric, bag are taken in compactedness, excellent in flame retardance, and the cohesiveness of resin is also excellent.
Comparative example 5
Use the slabstone scraper, the fabric coating viscosity that is coated with by floating scraper after the HEAT SETTING of normal direction embodiment 3 gained is 23PaS (23, aqueous polyurethane resin liquid 000cP) (the solid-state part of resin is 50%), this fabric is pressed with contacting of this slabstone scraper remain 16N/cm, making the resin adhesion amount is 20g/m
2, 130 ℃ of dryings 1 minute, obtain coated airbag base fabric then.
The property list of above-mentioned gained airbag base fabric is shown in the table 1.Gas barrier property, the bag of this airbag base fabric taken in compactedness, anti-flammability is no problem, but the poor adhesion of resin.
Comparative example 6
It is that (3, aqueous polyurethane resin liquid 000cP) (the solid-state part of resin is 50%) with the ironer extruding, makes the resin adhesion amount count 10g/m with solid-state part to 3PaS that fabric after the HEAT SETTING of embodiment 3 gained is soaked in viscosity
2, 130 ℃ of dryings 2 minutes, obtain airbag base fabric then.
The property list of above-mentioned gained airbag base fabric is shown in the table 1.This airbag base fabric, the cohesiveness of resin is no problem, but gas barrier property, that bag is taken in compactedness is poor.
The aspect ratio of using the monofilament cross section is 1.0 nylon 66 fiber, be that total fiber number is 470 dtexs, 72 monofilament, intensity 8.5cN/ dtex, percentage elongation 21%, non-twist silk, the density of making warp and parallel by water jet looms was respectively the plain cloth of 55/2.54cm, 190 ℃ of HEAT SETTING 1 minute.Use the slabstone scraper, the fabric coating viscosity that is coated with after this HEAT SETTING of normal direction by floating scraper is 15PaS (15,000cP) solvent-free is methyl ethylene silicone resin liquid, this slabstone scraper and contacting of fabric are pressed be 10N/cm, the base cloth tension adjustment is 2620N/m, and the resin adhesion amount is 18g/m
2, carry out 2 minutes vulcanizing treatment at 190 ℃ then, obtain coated airbag base fabric.
The property list of above-mentioned gained airbag base fabric is shown in the table 1.The gas barrier property of this airbag base fabric, bag are taken in compactedness, excellent in flame retardance, and the cohesiveness of resin is also excellent.
Comparative example 7
Use the slabstone scraper, be coated with by floating scraper among fabric coating and the embodiment 4 after the HEAT SETTING of gained among the normal direction embodiment 4 identical solvent-free be methyl ethylene silicone resin liquid, make the contact pressure of slabstone scraper remain 0.6N/cm, the base cloth tension adjustment is 2620N/m, and the resin adhesion amount is 30g/m
2, carry out 2 minutes vulcanizing treatment at 190 ℃ then, obtain coated airbag base fabric.
The property list of above-mentioned gained airbag base fabric is shown in the table 1.The gas barrier property of this airbag base fabric, bag are taken in compactedness, anti-flammability is no problem, but the poor adhesion of resin.
Using the aspect ratio in monofilament cross section is the long filament of the non-twist nylon 66 fiber of 1.0 (circular cross-sections), total fiber number 470dtex, 72 monofilament, intensity 8.4cN/dtex, percentage elongation 22%, by water jet looms, make the plain weave fabric that density all is adjusted to 54/2.54cm of knitting of warp and parallel.Then this fabric was soaked 3 minutes in 80 ℃ of tepidariums that contain 0.5g/l sodium alkyl benzene sulfonate and 0.5g/l soda ash, then 130 ℃ of dryings 2 minutes, then 190 ℃ of HEAT SETTING 1 minute.The residual oil mass of fabric is 0.04 weight % after the HEAT SETTING.Then, use the slabstone scraper, being coated with this fabric coating viscosity of normal direction by floating scraper is that (12,000cP) solvent-free is methyl ethylene silicone resin liquid to 12PaS, and making the resin adhesion amount is 15g/m
2, carry out 2 minutes vulcanizing treatment at 190 ℃ then, obtain coated airbag base fabric.The residual oil mass of this base cloth is 0.04 weight %.
The property list of above-mentioned gained airbag base fabric is shown in the table 1.The gas barrier property of this airbag base fabric, bag are taken in compactedness, excellent in flame retardance, and also excellent with the cohesiveness of resin.
Using the aspect ratio in monofilament cross section is 1.0 (circular cross-sections), total fiber number 470dtex, 72 monofilament, the long filament of the non-twist nylon 66 fiber of intensity 8.4cN/dtex, percentage elongation 22%, by water jet looms the density of knitting of warp and parallel all is adjusted to 54/2.54cm, makes plain weave fabric.Then with this fabric 160 ℃ of HEAT SETTING 1 minute.The residual oil mass of fabric after the HEAT SETTING is 0.08 weight %.Then use the slabstone scraper, being coated with this fabric of normal direction coating viscosity by floating scraper is that (12,000cP) solvent-free is methyl ethylene silicone resin liquid to 12PaS, and making the resin adhesion amount is 23g/m
2, carry out 2 minutes vulcanizing treatment at 190 ℃ then, obtain coated airbag base fabric.The residual oil mass of this base cloth is 0.08 weight %.
The property list of above-mentioned gained airbag base fabric is shown in the table 1.The gas barrier property of this airbag base fabric, bag are taken in compactedness, excellent in flame retardance, and mechanical property, also excellent with the cohesiveness of resin.
Comparative example 8
Using the aspect ratio in monofilament cross section is the long filament of the non-twist nylon 66 fiber of 1.0 (circular cross-sections), total fiber number 470dtex, 72 monofilament, intensity 8.4cN/dtex, percentage elongation 22%, is that the Auto-regulating System of Density of Heavy Medium of knitting of 58/2.54cm, parallel is 56/2.54cm by water jet looms with the Auto-regulating System of Density of Heavy Medium of knitting of warp, obtains plain weave fabric.Then this fabric was soaked 3 minutes in 80 ℃ of tepidariums that contain 0.5g/l sodium alkyl benzene sulfonate and 0.5g/l soda ash, then 130 ℃ of dryings 2 minutes, then 190 ℃ of HEAT SETTING 1 minute.The residual oil mass of fabric after the HEAT SETTING is 0.04 weight %.Then, use the slabstone scraper, being coated with this fabric coating viscosity of normal direction by floating scraper is that (12,000cP) solvent-free is methyl ethylene silicone resin liquid to 12PaS, and making the resin adhesion amount is 26g/m
2, carry out 2 minutes vulcanizing treatment at 190 ℃ then, obtain coated airbag base fabric.The residual oil mass of this base cloth is 0.04 weight %.
The property list of above-mentioned gained airbag base fabric is shown in the table 1.The gas barrier property of this airbag base fabric, mechanical property, anti-flammability are no problem, but with the poor adhesion of resin, and thickness is thick, stiffness is big, so bag to take in compactedness poor.
Embodiment 7
Using the aspect ratio in monofilament cross section is the long filament of the non-twist nylon 66 fiber of 3.0 (flat cross section), total fiber number 350dtex, 96 monofilament, intensity 8.4cN/dtex, percentage elongation 22%, by air-jet loom the density of knitting of warp and parallel all is adjusted to 63/2.54cm, obtains plain weave fabric.Then this fabric was soaked 3 minutes in 80 ℃ of tepidariums that contain 0.5g/l sodium alkyl benzene sulfonate and 0.5g/l soda ash, then 130 ℃ of dryings 2 minutes, then 190 ℃ of HEAT SETTING 1 minute.The residual oil mass of fabric after the HEAT SETTING is 0.05 weight %.Then, use the slabstone scraper, by floating scraper be coated with this fabric coating viscosity of normal direction be 8PaS (8, the methyl ethylene silicone resin liquid of dilution with toluene 000cP) (the solid-state part of resin is 80%), making the resin adhesion amount is 10g/m
2, 130 ℃ of dryings 1 minute, carry out 2 minutes vulcanizing treatment then at 200 ℃, obtain coated airbag base fabric.The residual oil mass of this base cloth is 0.05 weight %.
The property list of above-mentioned gained airbag base fabric is shown in the table 1.The gas barrier property of this airbag base fabric, bag are taken in compactedness, excellent in flame retardance, and also excellent with the cohesiveness of resin.
Comparative example 9
Using the aspect ratio in monofilament cross section is the long filament of the non-twist nylon 66 fiber of 3.0 (flat cross section), total fiber number 350dtex, 96 monofilament, intensity 8.4cN/dtex, percentage elongation 22%, by air-jet loom the density of knitting of warp and parallel all is adjusted to 57/2.54cm, obtains plain weave fabric.The residual oil mass of this fabric is 0.17 weight %.Then, use the slabstone scraper, by floating scraper be coated with this fabric coating viscosity of normal direction be 8Pas (8, the methyl ethylene silicone resin liquid of dilution with toluene 000cP) (the solid-state part of resin is 80%), making the resin adhesion amount is 4g/m
2, 130 ℃ of dryings 1 minute, carry out 2 minutes vulcanizing treatment then at 200 ℃, obtain coated airbag base fabric.The residual oil mass of this base cloth is 0.17 weight %.
The property list of above-mentioned gained airbag base fabric is shown in the table 1.It is no problem that the bag of this airbag base fabric is taken in compactedness, but gas barrier property, with cohesiveness, the poor fire of resin.
Table 1-1
| Embodiment 1 | Comparative example 1 | Comparative example 2 | Embodiment 2 | Comparative example 3 | Comparative example 4 | |
| Total fiber number (dtex) | ????470 | ????470 | ????470 | ????350 | ????350 | ????350 |
| Monofilament number (root) | ????72 | ????72 | ????72 | ????96 | ????96 | ????96 |
| Aspect ratio | ????1 | ????1 | ????1 | ????3 | ????3 | ????3 |
| Grey cloth density (the * of root/2.54cm) | ????46/46 | ????46/46 | ????46/46 | ????59/59 | ????59/59 | ????59/59 |
| Coverage coefficient | ????1885 | ????1885 | ????1885 | ????2094 | ????2094 | ????2094 |
| The residual oil mass (weight %) of base cloth | ????0.06 | ????0.07 | ????0.11 | ????0.05 | ????0.05 | ????0.07 |
| Resin adhesion amount (g/m 2) | ????15 | ????15 | ????15 | ????20 | ????35 | ????4 |
| Encapsulation ratio (%) | ????10.8 | ????0 | ????0 | ????4.8 | ????0 | ????0 |
| Permeability (%) | ????65 | ????8 | ????5 | ????37 | ????8 | ????82 |
| Central portion thickness T 1/ end thickness T2 (mm) | ????0.28/0.29 | ????0.28/0.29 | ????0.28/0.3 | ????0.25/0.26 | ????0.28/0.29 | ????0.23/0.23 |
| T1/T2 | ????0.97 | ????0.97 | ????0.93 | ????0.96 | ????0.97 | ????1 |
| Base cloth width W (cm) | ????150 | ????151 | ????150 | ????153 | ????152 | ????152 |
| Coating width C (cm) | ????146 | ????143 | ????142 | ????147 | ????145 | ????142 |
| C/W | ????0.97 | ????0.95 | ????0.95 | ????0.96 | ????0.95 | ????0.93 |
| TENSILE STRENGTH (N/cm) * | ????625/657 | ????633/659 | ????630/662 | ????620/639 | ????625/640 | ????618/635 |
| Elongation at break (%) * | ????26/23 | ????26/23 | ????26/23 | ????30/27 | ????30/27 | ????30/27 |
| Tearing strength (N) * | ????271/275 | ????277/280 | ????275/278 | ????308/324 | ????302/316 | ????319/331 |
| Stiffness (mm) * | ????64/68 | ????70/70 | ????68/72 | ????58/63 | ????65/73 | ????55/58 |
| 125Pa air permeability (cc/cm 2/ second) | ????0 | ????0 | ????0 | ????0 | ????0 | ????0.04 |
| 19.6KPa air permeability (cc/cm 2/ second) | ????0 | ????0 | ????0 | ????0 | ????0 | ????2.4 |
| Cohesiveness | ????○ | ????× | ????× | ????○ | ????× | ????× |
| Anti-flammability (mm/ minute) * | ????34/33 | ????38/35 | ????83/77 | ????30/28 | ????25/23 | ????115/132 |
| Taking in property (mm) | ????36 | ????36 | ????36 | ????36 | ????39 | ????34 |
* the value representation warp-wise/broadwise in showing
Table 1-2
| Embodiment 3 | Comparative example 5 | Comparative example 6 | Embodiment 4 | Comparative example 7 | |
| Total fiber number (dtex) | ????235 | ????235 | ????235 | ????470 | ????470 |
| Monofilament number (root) | ????72 | ????72 | ????72 | ????72 | ????72 |
| Aspect ratio | ????1 | ????1 | ????1 | ????1 | ????1 |
| Grey cloth density (the * of root/2.54cm) | ????76/76 | ????76/76 | ????76/76 | ????55/55 | ????55/55 |
| Coverage coefficient | ????2229 | ????2229 | ????2229 | ????2254 | ????2254 |
| The residual oil mass (weight %) of base cloth | ????0.03 | ????0.05 | ????0.04 | ????0.04 | ????0.05 |
| Resin adhesion amount (g/m 2) | ????20 | ????20 | ????10 | ????18 | ????30 |
| Encapsulation ratio (%) | ????18 | ????0 | ????100 | ????13.9 | ????0 |
| Permeability (%) | ????54 | ????70 | ????92 | ????36 | ????6 |
| Central portion thickness T 1/ end thickness T2 (mm) | ????0.22/0.23 | ????0.22/0.23 | ????0.22/0.22 | ????0.32/0.33 | ????0.33/0.34 |
| T1/T2 | ????0.96 | ????0.96 | ????1 | ????0.97 | ????0.97 |
| Base cloth width W (cm) | ????154 | ????154 | ????154 | ????152 | ????152 |
| Coating width C (cm) | ????148 | ????147 | ????154 | ????148 | ????139 |
| C/W | ????0.96 | ????0.95 | ????1 | ????0.97 | ????0.91 |
| TENSILE STRENGTH (N/cm) * | ????482/490 | ????478/485 | ????482/488 | ????720/715 | ????756/728 |
| Elongation at break (%) * | ????30/26 | ????30/26 | ????27/26 | ????29/26 | ????32/26 |
| Tearing strength (N) * | ????115/124 | ????119/127 | ????85/86 | ????255/274 | ????364/415 |
| Stiffness (mm) * | ????72/85 | ????75/88 | ????79/95 | ????56/82 | ????52/72 |
| 125Pa air permeability (cc/cm 2/ second) | ????0 | ????0 | ????0.03 | ????0 | ????0 |
| 19.6KPa air permeability (cc/cm 2/ second) | ????0 | ????0 | ????1 | ????0 | ????0 |
| Cohesiveness | ????○ | ????× | ????○ | ????○ | ????× |
| Anti-flammability (mm/ minute) * | ????35/32 | ????37/36 | ????79/73 | ????38/38 | ????52/70 |
| Taking in property (mm) | ????30 | ????30 | ????34 | ????44 | ????46 |
* the value representation warp-wise/broadwise in showing
Table 1-3
| Embodiment 5 | Embodiment 6 | Comparative example 8 | Embodiment 7 | Comparative example 9 | |
| Total fiber number (dtex) | ????470 | ????470 | ????470 | ????350 | ????350 |
| Monofilament number (root) | ????72 | ????72 | ????72 | ????96 | ????96 |
| Aspect ratio | ????1 | ????1 | ????1 | ????3 | ????3 |
| Grey cloth density (the * of root/2.54cm) | ????55/55 | ????55/55 | ????58/56 | ????63/63 | ????57/57 |
| Coverage coefficient | ????2254 | ????2254 | ????2336 | ????2236 | ????2023 |
| The residual oil mass (weight %) of base cloth | ????0.04 | ????0.08 | ????0.04 | ????0.05 | ????0.17 |
| Resin adhesion amount (g/m 2) | ????15 | ????23 | ????26 | ????10 | ????4 |
| Encapsulation ratio (%) | ????13.9 | ????12.5 | ????0 | ????10.4 | ????0 |
| Permeability (%) | ????37 | ????32 | ????6 | ????24 | ????5 |
| Central portion thickness T 1/ end thickness T2 (mm) | ????0.32/0.34 | ????0.32/0.34 | ????0.35/0.38 | ????0.26/0.27 | ????0.22/0.23 |
| T1/T2 | ????0.94 | ????0.94 | ????0.92 | ????0.96 | ????0.96 |
| Base cloth width W (cm) | ????150 | ????150 | ????147 | ????155 | ????154 |
| Coating width C (cm) | ????147 | ????146 | ????140 | ????148 | ????136 |
| C/W | ????0.98 | ????0.97 | ????0.95 | ????0.95 | ????0.88 |
| TENSILE STRENGTH (N/cm) * | ????767/750 | ????760/755 | ????797/764 | ????657/660 | ????586/591 |
| Elongation at break (%) * | ????29/26 | ????29/26 | ????29/26 | ????30/25 | ????28/23 |
| Tearing strength (N) * | ????272/313 | ????268/321 | ????236/292 | ????243/293 | ????191/181 |
| Stiffness (mm) * | ????59/86 | ????51/80 | ????91/121 | ????68/81 | ????59/77 |
| 125Pa air permeability (cc/cm 2/ second) | ????0 | ????0 | ????0 | ????0 | ????0.05 |
| 19.6KPa air permeability (cc/cm 2/ second) | ????0 | ????0 | ????0 | ????0 | ????3.2 |
| Cohesiveness | ????○ | ????○ | ????× | ????○ | ????× |
| Anti-flammability (mm/ minute) * | ????57/54 | ????68/70 | ????66/75 | ????61/54 | ????123/181 |
| Taking in property (mm) | ????44 | ????45 | ????50 | ????36 | ????32 |
* the value representation warp-wise/broadwise in showing
Industrial applicibility
According to the present invention, can provide and have simultaneously gas barrier property, heat resistance concurrently, take in compactedness, and coated airbag base fabric, air bag and the manufacture method thereof of the cohesive excellence of resin coating, therefore can promote air bag popularizing occupant's protection system.
Claims (19)
1. coated airbag base fabric is characterized in that: the one side at least of fiber fabric is covered by resin, and at least a portion monofilament that constitutes this cloth and silk wrapped up by this resin, and at least a portion monofilament that constitutes this cloth and silk is not wrapped up by this resin.
2. the coated airbag base fabric of claim 1, wherein by the ratio of the monofilament of above-mentioned resin parcel with respect to whole monofilament in the scope of 3-20%.
3. the coated airbag base fabric of claim 2, wherein by the ratio of the monofilament of above-mentioned resin parcel with respect to whole monofilament in the scope of 5-15%.
4. each coated airbag base fabric among the claim 1-3, wherein this resin permeates in the 10-70% of cloth and silk thickness scope.
5. the coated airbag base fabric of claim 4, wherein this resin permeates in the 15-50% of cloth and silk thickness scope.
6. each coated airbag base fabric among the claim 1-5, wherein the adhesion amount of this resin is at 5-30g/m
2Scope in.
7. the coated airbag base fabric of claim 6, wherein the adhesion amount of this resin is at 5-20g/m
2Scope in.
8. each coated airbag base fabric among the claim 1-7, wherein this resin be solvent-free be silicone resin.
9. each coated airbag base fabric among the claim 1-8, wherein the air permeability of measuring according to the method for JIS L1096A method defined is 0.01cc/cm
2/ second or below.
10. each coated airbag base fabric among the claim 1-9, when fluid (air) was adjusted to the pressure circulation of 19.6kPa, measuring the air permeability that the air mass flow passed through obtains was 1cc/cm
2/ second or below.
11. each coated airbag base fabric among the claim 1-10, wherein residual oil mass are 0.1 weight % or following.
12. the coated airbag base fabric of claim 11, the residual oil mass of the fiber fabric before wherein resin covers is 0.1 weight % or following.
13. each coated airbag base fabric among the claim 1-12, wherein middle body thickness T 1 is 0.9≤T1/T2 with the pass of the thickness T 2 of coating end, and the pass of the coating width C of the base cloth width W of this base cloth and coating resin ties up in the scope of 0.95≤C/W≤0.99.
14. the coated airbag base fabric of claim 13, wherein middle body thickness T 1 is 0.95≤T1/T2 with the pass of the thickness T 2 of coating end.
15. each coated airbag base fabric among the claim 1-14, wherein the anti-flammability of measuring according to FMVSS302 was less than 100mm/ minute.
16. air bag, this air bag have used among the claim 1-15 each coated airbag base fabric.
17. the manufacture method of coated airbag base fabric, it is characterized in that: with the coating blade of acute angle blade, by the scraper type coating machine, pressing with contacting of this cloth and silk at coating blade is in the scope of 1-15N/cm, with viscosity at 5-20Pas (5,000-20,000cP) resin liquid in the scope is applied on the fiber fabric.
18. the manufacture method of the coated airbag base fabric of claim 17 wherein makes base cloth tension force at 500-3, coating resin liquid in the scope of 000N/m.
19. it is coating resin liquid that the manufacture method of the coated airbag base fabric of claim 18, this method are not implemented the refining processing of fiber fabric.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP292239/2002 | 2002-10-04 | ||
| JP2002292239A JP4419378B2 (en) | 2002-10-04 | 2002-10-04 | Airbag base fabric and manufacturing method thereof |
| JP352283/2002 | 2002-12-04 | ||
| JP376972/2002 | 2002-12-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1703550A true CN1703550A (en) | 2005-11-30 |
| CN100335713C CN100335713C (en) | 2007-09-05 |
Family
ID=32283559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003801009145A Expired - Lifetime CN100335713C (en) | 2002-10-04 | 2003-10-03 | Coated airbag base fabric and airbag |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4419378B2 (en) |
| CN (1) | CN100335713C (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101070674B (en) * | 2006-05-12 | 2010-08-25 | 丰田合成株式会社 | Airbag |
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2002
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2003
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Also Published As
| Publication number | Publication date |
|---|---|
| CN100335713C (en) | 2007-09-05 |
| JP4419378B2 (en) | 2010-02-24 |
| JP2004124321A (en) | 2004-04-22 |
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