CN102535182A - Coated fabric for safety airbag and production method of coated fabric - Google Patents
Coated fabric for safety airbag and production method of coated fabric Download PDFInfo
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- CN102535182A CN102535182A CN2010106205702A CN201010620570A CN102535182A CN 102535182 A CN102535182 A CN 102535182A CN 2010106205702 A CN2010106205702 A CN 2010106205702A CN 201010620570 A CN201010620570 A CN 201010620570A CN 102535182 A CN102535182 A CN 102535182A
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Abstract
The invention discloses a coated fabric for a safety airbag and a production method of the coated fabric. Protofilaments used for forming warps and wefts of the fabric are flat filaments, wherein filament fineness of the flat filaments is 300-700dtex, strength of the flat filaments is 7.0-8.5cN/dtex, and monofilament flat rate of the flat filaments is 2.0-7.0; a layer of synthetic resin is coated on a surface of the fabric, wherein the coating amount of the synthetic resin is 5-15g/m<2>; and containing performance of the fabric is 1500-2000cm<3>. The coated fabric for the safety airbag, disclosed by the invention, not only maintains good folding performance, but also has lower combustion performance.
Description
Technical field
The present invention relates to a kind of air bag with coated fabric and production method thereof.
Background technology
In recent years, along with the raising of passenger safety consciousness, also sharply increased as the installation rate of the air bag of auto-safety mechanism.When automobile generation collision accident, can the perception prominent impact that comes of the sensor of air bag produces high temperature, gases at high pressure immediately from expander.This gas can make air bag open fast, thereby protects passenger's safety.
Air bag was to use to be coated with the elastomeric base cloth of chlorobutadiene, olefinic sulphur acid esters, silicone etc. in the past, thereby reached the purpose of heat resistance, air circuit breaker property (venting quality), flame retardancy.But these coated base fabric grammes per square metres are big, flexibility low, the weaving cost is high, difficulty reclaims, has a lot of not enough points as air bag with base cloth.Though a part of silicone coating base cloth that uses has now improved for above deficiency greatly, also is not the fabric that meets most.
Importantly air bag should have the scratch to the human face when preventing to launch of necessary flexibility.Along with the miniaturization of security module, new requirement has been proposed for the folding property of air bag, taking in property and flammability and cost aspect.
In patent publication No. CN1703550, proposed the characteristic of a kind of coated airbag base fabric and air bag, the worker's amount that is coated with of only having mentioned fabric is at 5～20g/m
2Scope in, the long filament of not mentioning fabric is a flat filament.
Disclose among the patent CN1603174A and a kind ofly constituted by the odd-shaped cross section silk; And the monofilament cross section flatness of this odd-shaped cross section silk is 1.5～5.0 lightweight, the foundation fabric for gas bag of low venting quality, but this flat filament be shaped as ellipse or near oval; And the shape of each monofilament does not require unification; Because the void ratio between the oval cross section of use precursor is bigger, then the reduction effect of venting quality is not fairly obvious, and fabric does not pass through coating HEAT SETTING.
Summary of the invention
The object of the present invention is to provide a kind of good folding property that not only kept, the air bag that has low combustibility simultaneously again is with coated fabric and production method thereof.
Air bag of the present invention is used coated fabric; The warp thread and/or the weft yarn proto-filament that form this fabric are that filament linear-density is that 300～700dtex, brute force are that 7.0～8.5cN/dtex, monofilament flat ratio are 2.0～7.0 flat filament, and to apply one deck coated weight at this fabric face be 5～15g/m
2Synthetic resin, the taking in property of this fabric is 1500～2000cm
3If the monofilament flat ratio is lower than 2.0, then the folding property of base cloth does not obviously improve, and uses the DeGrain of flat filament, if the monofilament flat ratio is higher than 7.0, the effect of flat filament is saturated, can lower the intensity of monofilament simultaneously.
On the one hand, about applying effect, because this fabric employing is flat multifilament; Because the particularity of flat multifilament; Concavo-convex between multifilament is lower than the circular cross section fabric, so when applying the synthetic resin of same units weight, resin will be higher than the circular cross section fabric at the effective thickness of fabric face.If will obtain the coating of identical effective thickness, in Unit Weight, the needed amount of resin of flat multifilament fabric will be lower than the circular cross section fabric simultaneously.This also is the flat fabric coated weight reason low than the circular cross section fabric.On the other hand, about coated weight, if the coated weight of synthetic resin is less than 5.0g/m
2, just be difficult to air take place easily leak, than being easier to burning with the complete covering fabric of resin molding surface; If the coated weight of synthetic resin is greater than 15.0g/m
2, not only increased processing cost, and the resin molding thickening of fabric face, the flexibility of fabric is impaired, and taking in property is affected.Above-mentioned synthetic resin can be polyurethane resin etc.
This fabric for safety air bag is measured according to ASTM D6478-00 testing standard, and its taking in property is 1500～2000cm
3, preferred taking in property 1750～1900cm
3, if taking in property is greater than 2000cm
3Then the folding property of air bag is not good, is unfavorable for the walk quickly improvement of folding miniaturization of air bag.
Air bag of the present invention is used coated fabric, and the flammability of above-mentioned synthetic resin is less than 80mm/min.Because in synthetic resin, added flame-retardant compound, the halogen compounds, particularly halo cycloalkane, cupric oxide, titanium oxide of brominated, chlorine etc. are so can improve fire resistance.
Air bag of the present invention is used coated fabric, and the monofilament section configuration of above-mentioned flat filament is made up of two semicircles at two parallel lines and straight line two ends, and straight line and semicircle are tangent, and the distance between two straight lines is the semicircle diameter.During the flat filament proper alignment of this section configuration, void ratio each other is less, can obtain lower venting quality, and its powerful effect that keeps is also fine simultaneously.
Air bag of the present invention is used coated fabric, and according to the TENSILE STRENGTH of the stretching test method test fabric of JIS K-6404 fabric, its TENSILE STRENGTH is more than the 550N/cm, more than the preferred 700N/cm.If TENSILE STRENGTH is lower than 550N/cm, then the intensity of base cloth can not satisfy the requirement of airbag-releasing, and gasbag breaks, and does not reach protection occupant's effect.
Air bag of the present invention is used coated fabric, and the extension at break degree of this synthetic resin is more than 800%.Increase the elasticity of base cloth, make its product have high elasticity, not cracky.
Air bag of the present invention is used coated fabric, contains 70～110 monofilament in the synthetic fiber filament, and preferred 80～100 monofilament under the constant condition of fiber number, if the monofilament radical is less than 80, then do not reach the effect that lowers venting quality; If the monofilament radical more than 100, then when having increased the spinning difficulty, can lower the intensity of monofilament, and woven difficulty can increase also.
Air bag of the present invention is with the production method of coated fabric; Comprise weave, refining, drying, coating, HEAT SETTING; Selecting warp thread and/or weft yarn proto-filament for use is that filament linear-density is that 300～700dtex, brute force are that 7.0～8.5cN/dtex, monofilament flat ratio are that 2.0～7.0 flat filament is weaved; Warp tension is 50～120g/ root when weaving; Concise temperature is 20～80 ℃, and baking temperature of its concise back fabric is 70～140 ℃, and then dried fabric is applied one deck coated weight is 5～15g/m
2Synthetic resin, under setting temperature is 160～210 ℃, time 30～90s, carry out HEAT SETTING again, make product at last.
In weaving process, weave under the warp tension of 50～120g/ root with water jet looms, be lower than the 50g/ root as if warp tension, then fabric venting capability meeting variation; If warp tension is higher than the 120g/ root, then fabric is difficult for weaving.Weave the back and base cloth is carried out concise, dry again, baking temperature is 70～140 ℃, and be 30～120s drying time.Some dry temperature are lower than 70 ℃, then are difficult for fully dry; Some dry temperature are higher than 140 ℃, then base cloth have been carried out preliminary typing, be unfavorable for the back when finalizing the design to control of physical properties.Some dry times are lower than 30s, and then dry being difficult for, some dry times are higher than 120s, then are unfavorable for the raising of production efficiency, have increased production cost.And then dried fabric is applied one deck coated weight is 5～15g/m
2Synthetic resin, be 180～210 ℃ at heat setting temperature again, carry out HEAT SETTING under time 30～90s, if heat setting temperature is lower than 180 ℃, then dimensional stability for fabric is poor, fabric rerum natura deviation is big; If heat setting temperature is higher than 210 ℃, then the fabric tearing strength reduces, and the ductility of fabric reduces.If heat-setting time is lower than 30s, then dimensional stability for fabric is poor, and fabric rerum natura deviation is big; If heat-setting time is higher than 90s, then possibly cause the fabric tearing strength to reduce, the ductility of fabric reduces.
Consider the economy and the resistance to impact of air bag among the present invention; So our preferred nylon 66 is as precursor; In addition, in order to improve these synthetic fiber, contain or to add various additives all no problem at precursor manufacture process and the technology permeability of back in the process.For example antioxidant, heat stabilizer, lubricant, antistatic agent, fire retardant etc.
Air bag of the present invention has good folding property with coated fabric, has lower combustibility simultaneously.
Description of drawings
Figure is the sectional view of flat filament of the present invention, and a is the major axis of monofilament among the figure, and b is the minor axis of monofilament.
The specific embodiment
Through following examples, the present invention is described in further detail.Rerum natura in embodiment, the comparative example is measured by following method.
[flat ratio] measured the major axis (a) of monofilament and the length of minor axis (b) to photographing with the monofilament section of 200 times of SEM amplifications on photo, obtain flat ratio according to its ratio.Measure 20 groups of data, calculate its mean value.
Flat ratio=a/b
[taking in property]
Measure according to ASTM D6478-00 testing standard, through after folding, put into fabric the standard holder and obtain its compression curve, read respectively that loading is 20N on the compression curve, 40N, 60N, 80N, 100N, 120N, 140N, 160N, the thickness of base cloth during 180N.Go out the value of taking in property according to computes.
Taking in property (cm
3Summation * 100 * 150/1000 of the corresponding thickness of)=each loading
[flammability]
Establishing criteria is FMVSS 302.Concrete experimental technique: be ready to sample, difficulty is fired the machine switch opens, point is fought flame is adjusted to specified altitude: 38mm.Be put into coupons on the brassboard, be placed into again in the difficult combustion machine.When arriving test coupon experiment end 38mm timing, flame begins.Burning 254mm stops timing, if burning time is write down in fray-out of flame midway.Calculate burning velocity, the wherein later burning length T of S:38mm: burning time
V＝S/T
[Density]
According to the method for JIS L 1096, keep flat fabric on the table, number goes out the radical of silk in the 5cm interval, at the radical apart from internal thread that is converted into an inch.
[TENSILE STRENGTH]
TENSILE STRENGTH according to the stretching test method test fabric of JIS K-6404 fabric.Concrete method of testing is following: (4 * 25cm) sandwich in the tension test appearance folder mouthful, and the folder mouth of tension test appearance is apart from being 15cm, make an experiment with the test speed of 200mm/min adopting the sample that pulls limit sliver appearance method and obtain on the fabric.
[the extension at break degree of synthetic resin]
With thickness after the drying at room temperature is that the synthetic resin of 100～200um carried out drying 5 minutes at 140 ℃ again, then according to its extension at break degree of JIS L-1096 stretching test method test.
Embodiment 1
The employing filament fineness be 470dtex, percentage elongation be 23.5%, powerful for 7.78cN/dtex, monofilament flat ratio are 3.60, radical is 96 flat nylon 66 long filaments; Use water jet looms under the condition of weaving tension as the 80g/ root; Adopt plain weave; Design is that 51/inch weaves through broadwise density, makes grey cloth, with the grey cloth that makes concise temperature be carry out under 40 ℃ concise; Be the drying of 130 ℃ * 60s through baking temperature again, and then dried fabric is applied one deck coated weight is 13g/m
2Polyurethane synthetic resin, carry out 180 ℃ * 40s HEAT SETTING again and handle, make air bag at last and use coated fabric, its result sees table 1.
Embodiment 2
The employing filament fineness be 470dtex, percentage elongation be 23.5%, powerful for 7.78cN/dtex, monofilament flat ratio are 4.90, radical is 96 flat nylon 66 long filaments; Use water jet looms under the condition of weaving tension as the 80g/ root; Adopt plain weave; Design is that 45/inch weaves through broadwise density, makes grey cloth, with the grey cloth that makes concise temperature be carry out under 40 ℃ concise; Be the drying of 130 ℃ * 60s through baking temperature again, and then dried fabric is applied one deck coated weight is 10g/m
2Polyurethane synthetic resin, carry out 180 ℃ * 40s HEAT SETTING again and handle, make air bag at last and use coated fabric, its result sees table 1.
Embodiment 3
The employing filament fineness be 470dtex, percentage elongation be 23.5%, powerful for 7.78cN/dtex, monofilament flat ratio are 6.51, radical is 96 flat nylon 66 long filaments; Use water jet looms under the condition of weaving tension as the 80g/ root; Adopt plain weave; Design is that 53/inch weaves through the broadwise weaving density, makes grey cloth, with the grey cloth that makes concise temperature be carry out under 40 ℃ concise; Be the drying of 130 ℃ * 60s through baking temperature again, and then dried fabric is applied one deck coated weight is 7g/m
2Polyurethane synthetic resin, carry out 180 ℃ * 40s HEAT SETTING again and handle, make air bag at last and use coated fabric, its result sees table 1.
Comparative example 1
The employing filament fineness is 470dtex, powerful for 8.2cN/dtex, percentage elongation are 24%, the monofilament radical is 72 circular cross section nylon 66 long filaments; Use water jet looms under the condition of weaving tension as the 150g/ root, adopt plain weave, design is that 51/inch weaves through broadwise density; Make grey cloth; Is to carry out concisely under 40 ℃ with the grey cloth that makes in concise temperature, is the drying of 130 ℃ * 60s through baking temperature again, and then dried fabric is applied one deck coated weight is 17g/m
2Polyurethane synthetic resin, carry out 180 ℃ * 40s HEAT SETTING again and handle, make air bag at last and use coated fabric, its result sees table 1.
Comparative example 2
The employing filament fineness is that 470dtex, intensity are that 8.2cN/dtex, percentage elongation are 24%, the monofilament radical is 72 circular cross section nylon 66 long filaments; Use water jet looms under the condition of weaving tension as the 80g/ root; Adopt plain weave, design is that 53/inch weaves through broadwise density, makes grey cloth; With the grey cloth that makes concise temperature be carry out under 40 ℃ concise; Being the drying of 130 ℃ * 60s through baking temperature again, is the drying of 130 ℃ * 60s through baking temperature again, and then dried fabric is applied one deck coated weight is 20g/m
2Polyurethane synthetic resin, carry out 180 ℃ * 40s HEAT SETTING again and handle, make air bag at last and use coated fabric, its result sees table 1.
Table 1
Can find out that from table 1 compare with circular cross section nylon 66 filament yarn fabrics commonly used, flat section nylon 66 long filament coated fabrics have better taking in property, have lower flammability simultaneously.
Claims (6)
1. an air bag is used coated fabric; It is characterized in that: the warp thread and/or the weft yarn proto-filament that form this fabric are that filament linear-density is that 300～700dtex, brute force are that 7.0～8.5cN/dtex, monofilament flat ratio are 2.0～7.0 flat filament, and to apply one deck coated weight at this fabric face be 5～15g/m
2Synthetic resin, the taking in property of this fabric is 1500～2000cm
3
2. air bag according to claim 1 is used coated fabric, it is characterized in that: the flammability of said fabric is less than 80mm/min.
3. air bag according to claim 1 and 2 is used coated fabric; It is characterized in that: the monofilament section configuration of said flat filament is made up of two semicircles at two parallel lines and straight line two ends; Straight line and semicircle are tangent, and the distance between two straight lines is the semicircle diameter.
4. air bag according to claim 1 and 2 is used coated fabric, it is characterized in that: the TENSILE STRENGTH of this fabric is more than the 550N/cm.
5. air bag according to claim 1 is used coated fabric, it is characterized in that: the extension at break degree of said synthetic resin is more than 800%.
6. an air bag as claimed in claim 1 is with the production method of coated fabric; Comprise weave, refining, drying, coating, HEAT SETTING; It is characterized in that: selecting warp thread and/or weft yarn proto-filament for use is that filament linear-density is that 300～700dtex, brute force are that 7.0～8.5cN/dtex, monofilament flat ratio are that 2.0～7.0 flat filament is weaved; Warp tension is 50～120g/ root when weaving; Concise temperature is 20～80 ℃, and the baking temperature of its concise back fabric is 70～140 ℃, and then dried fabric being applied one deck coated weight is 5～15g/m
2Synthetic resin, under 160～210 ℃ of setting temperatures, time 30～90s, carry out HEAT SETTING again, make product at last.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106205702A CN102535182A (en) | 2010-12-22 | 2010-12-22 | Coated fabric for safety airbag and production method of coated fabric |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106205702A CN102535182A (en) | 2010-12-22 | 2010-12-22 | Coated fabric for safety airbag and production method of coated fabric |
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| CN102535182A true CN102535182A (en) | 2012-07-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110997995A (en) * | 2017-08-21 | 2020-04-10 | 东洋纺株式会社 | Fabric for airbag, coated fabric for airbag, and airbag using same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1856614A (en) * | 2002-01-16 | 2006-11-01 | 东丽株式会社 | Base cloth for coated airbag and method for manufacturing the same |
| CN1986927A (en) * | 2006-12-22 | 2007-06-27 | 吴江祥盛纺织染整有限公司 | No-coating air bag fabric and its making process |
| CN101634074A (en) * | 2008-07-23 | 2010-01-27 | 东丽纤维研究所（中国）有限公司 | Fabric for safety air bag and production method thereof |
-
2010
- 2010-12-22 CN CN2010106205702A patent/CN102535182A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1856614A (en) * | 2002-01-16 | 2006-11-01 | 东丽株式会社 | Base cloth for coated airbag and method for manufacturing the same |
| CN1986927A (en) * | 2006-12-22 | 2007-06-27 | 吴江祥盛纺织染整有限公司 | No-coating air bag fabric and its making process |
| CN101634074A (en) * | 2008-07-23 | 2010-01-27 | 东丽纤维研究所（中国）有限公司 | Fabric for safety air bag and production method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110997995A (en) * | 2017-08-21 | 2020-04-10 | 东洋纺株式会社 | Fabric for airbag, coated fabric for airbag, and airbag using same |
| US11130467B2 (en) | 2017-08-21 | 2021-09-28 | Toyobo Co., Ltd. | Fabric for airbag, coated fabric for airbag, and airbag using same |
| CN110997995B (en) * | 2017-08-21 | 2022-05-31 | 东洋纺株式会社 | Fabric for airbag, coated fabric for airbag, and airbag using same |
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Application publication date: 20120704 |