CN101205650A - Non-coating fabric of safety gas-bag - Google Patents
Non-coating fabric of safety gas-bag Download PDFInfo
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- CN101205650A CN101205650A CNA2006101664927A CN200610166492A CN101205650A CN 101205650 A CN101205650 A CN 101205650A CN A2006101664927 A CNA2006101664927 A CN A2006101664927A CN 200610166492 A CN200610166492 A CN 200610166492A CN 101205650 A CN101205650 A CN 101205650A
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Abstract
The invention discloses an air bag non-coating textile fabric which is weaved by synthetic fiber filaments, wherein, the synthetic fiber filaments in the textile fabric consist of 50 to 500 monofilaments; cross sections of the synthetic fiber filaments in the textile fabric are round cross sections; fineness of the monofilaments in synthetic fibers is 0.10 to 10 dezitexes. The invention has the advantages of high slippage resistance and low air permeability.
Description
Technical field:
The present invention relates to a kind of air bag non-coated fabric.
Background technology:
Be accompanied by the occupant as the air bag of one of automotive safety parts in recent years the raising of automotive safety consciousness is promptly installed, air bag has become the indispensable safety guard of automotive occupant.Safe automobile air bag mainly is made up of sensor, gas generator and air bag.The moment of colliding, sensor collection collision signal, computer is to signal identification, processing, light gas generator, the gas that blast is discharged will be full of whole air bag, the impact that it can absorbing bodily travels forward and produces, and by emission gases to release energy, the needed time of whole process is greatly within 100ms.
Vehicle necessarily requires air bag to launch in the extremely short time when being subjected to clashing into, and must have certain inflation pressure retention, so that the energy that can promptly absorb the driver and conductor and be impacted, so air bag should satisfy following requirement: should have lower gas permeability during expansion; That slippage takes place is excessive because the effect of high temperature and high pressure gas causes making the position in the process of launching in order to prevent air bag, requires safe air bag fabric must have higher slippage resistance; In addition, air bag also 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 also for the folding property of air bag and taking in property and cost aspect.In middle and high speed expansion of the characteristic of these requirements and inflation pressure retention is the key property of air bag.
At the problem of air bag low-permeable, many solutions have been proposed in disclosed patent.
Patent CN1070129C has announced that a kind of is that 1.5-7dtex, intensity are 50-80 * 10 by filament number
-2N/tex and elongation are for the air bag non-coated fabric of the polyamide filaments weaving yarns of 15-30%, though its gas permeability is＜3L/d
2M/min has realized lower gas permeability, but owing to be the Air permenbility of testing down in low pressure (500Pa), therefore can not satisfy more and more higher low-permeable requirement.Therefore the data of measuring under the prerequisite of the also tangible 125Pa of Air permenbility among this external patent CN1637178A can not satisfy more and more higher low-permeable requirement.
The woven safe air bag fabric of synthetic fiber filament that contains special-shaped shape with a kind of cross section is disclosed among the patent CN1603174A, be to have adopted long filament specifically with certain flatness, though this fabric has been realized lower gas permeability, but depart from because entanglement takes place when weaving flat filament easily, thereby make the slippage resistance of fabric reduce, the gas permeability variation of fabric influences air bag inflation pressure retention upon deployment.
Te Kaiping 1-122752 communique is put down in writing, after adopting high density to carry out fabric knitting, again by shrinking processing or calendering processing, make fabric have characteristics such as lightweight, low air permeability, but after fabric is through calendering processing, can make the brute force of tearing of fabric descend, influence the performance of safe air bag fabric.
Open to disclose in the flat 1-41438 communique the spy and be not less than 8.5g/d and weave the safe air bag fabric that forms by the long filament that monofilament fineness is not more than 3 DENIER by a kind of intensity, though this fabric has low gas permeability and good folding property, but be not specifically related to the difference of coating and non-coated fabric in the document, in fact this patent is that surface-coated one deck at fabric contains the coated fabric that elastomer such as chloroprene rubber forms, when therefore this technology being applied to non-coating aspect, can not obtain good low-permeable.
In all above-mentioned patents, be that the slippage resistance is not set forth as the important anti-slipping property of air bag.They all are the performance characteristics of considering fabric from the gas permeability aspect of fabric.
Therefore the FMVSS208 rules have been revised by the U.S. in 2000, inquire into regard to the secondary problem of gas generator, are necessary to carry out to improve the slippage resistance of fabric towards the exploitation of the safe air bag fabric of the high output of high temperature of gas generator secondary generation.
Up to the present, there are some companies to carry out considering and having proposed the method for improving from the slippage resistance aspect of making position and fabric.For example patent WO2003/059702 has proposed to improve the slippage resistance of making position and fabric with new seam mode.United States Patent (USP) has illustrated for No. 5470106 on the zone that surrounds the gas generator connection and has used woven fabric, can improve antiskid and move resistance.But these methods exist certain problem aspect operability, and it can make the cost of product increase though use reinforcement cloth can increase the slippage resistance in addition.
In addition, 5296278 li of United States Patent (USP)s, proposed to carry out the method for silicon coating making the position, this method also can be brought the rising of cost, can not satisfy the requirement that the automobile industry reduces cost.
Based in the past background of invention and technical background up to now, this patent has been invented a kind of air bag non-coated fabric that is made of the fine denier long filament of circular cross-section, and this fabric has excellent anti-slipping property and low-permeable.
Summary of the invention:
The object of the present invention is to provide a kind of safe air bag fabric that has high slippage resistance and have low-permeable.
Technical solution of the present invention is:
A kind of non-coated fabric that is used for air bag is weaved by synthetic fiber filament and to be formed, and it is characterized in that:
(1) contains 50-500 root monofilament in the fabric in the long filament of synthetic fiber;
(2) cross section of synthetic fiber filament is a circular cross-section in the fabric;
(3) monofilament fineness is in the synthetic fiber: 0.10-10dtex.
The safe air bag fabric of invention is by weave synthetic fiber filament that contains 50-500 root monofilament and the safe air bag fabric that obtains after processing.Preferred 96-200 root monofilament, if adopt the monofilament number to weave less than 50 long filament, the gas permeability of fabric can be bigger than normal; If the long filament that adopts the monofilament number to be higher than 500 is weaved, as this technical professional, the monofilament number is The more the better, but can increase the difficulty of spinning like this, and the difficulty of weaving of fabric is improved, and causes the increase of cost.
The present invention adopts the thin fibrillation monofilament (LDPF) with circular cross-section, and the arrangement of monofilament is difficult for taking place entanglement and off-set phenomenon when weaving, and therefore can obtain to have the fabric of stable structure.Utilize this technology can obtain to have the fabric of high slippage resistance and low-permeable.
Non-coating safe air bag fabric of the present invention is 0.10-10dtex with the monofilament fineness of long filament.The monofilament of preferred 2.0-6.0dtex.If monofilament fineness is less than 0.1dtex, the spinning comparison difficulty that will seem then; If monofilament fineness greater than 10dtex, then weave the back fabric monofilament between voidage will become greatly, do not reach the effect of low-permeable.
The warp-wise slippage resistance of fabric is 300-1000N, preferred 300-900N; The slippage resistance of broadwise is 250-900N, preferred 250-650N.Slippage resistance warp-wise if less than 300N, broadwise less than 250N, just can not be applicable to the high gas generator of exporting.Even specifically go in other words driver's seat the 190KPa igniter but for the high pattern of fever igniter of 230KPa, constitute the perforate meeting apparition of air bag in the portion of making, not only can cause in the air bag drops but also hot blast to leak the injury that also can cause to the driver and conductor.In addition, if slippage resistance words bigger, can make the firm soft of safe air bag fabric to increase than the 900N of the 1000N of warp-wise and broadwise, thereby have influence on the problem that safe air bag fabric folds miniaturization.As everyone knows, do not influencing under safe air bag fabric folding property and the just soft prerequisite, the slippage resistance of fabric is to be the bigger the better.Here said slippage resistance is fixed with ASTM D-6479 Fa Measuring, and it is that the evaluate safety air bag is being made a very important physical index of position slippage.
The air permeability of non-coating safe air bag fabric of the present invention is for when pressure is 19.6KPa, and the air permeability of fabric is＜2.5L/cm
2/ min, preferred air permeability is＜0.9L/cm
2/ min is when the air permeability of fabric is higher than 2.5L/cm
2During/min, by its air bag of making upon deployment the inflation pressure retention of air bag will become very poor, do not reach the effect of protection, it has lost the effect of the thin fibrillation of monofilament as fabric.
The theoretical coverage coefficient (CF) of non-coating safe air bag fabric of the present invention is 2000-2600, preferred 2200-2500, when the coverage coefficient of fabric is higher than 2600, the feel of fabric is hardened, safe air bag fabric is not easy to fold, cause the volume ratio of security module bigger, thereby increase production cost.Coverage coefficient in this patent adopts following computing formula to obtain:
N wherein
W: the warp-wise density of fabric (root/inch); D
W: the fineness of warp-wise long filament (dtex) in the fabric; N
F: the latitudinal density of fabric (root/inch); D
F: the fineness of broadwise long filament (dtex) in the fabric.As the technical staff who is engaged in this cause, under the prerequisite that other conditions of safe air bag fabric can both satisfy, the coverage coefficient of fabric is the smaller the better, but too small fabric cover can make that the space between long filament and long filament increases between fabric, causes gas permeability to increase.
The warp tensile strength of fabric is: 550-1000N/cm, the TENSILE STRENGTH of broadwise is: 550-950N/cm.Through the preferred 600-800N/cm of broadwise TENSILE STRENGTH.TENSILE STRENGTH in this patent is the testing standard according to JISK6404, adopts the TENSILE STRENGTH of pulling limit sliver sample method test safety gas cell fabric.
The fiber that is used for safe air bag fabric of the present invention, not special the qualification can be used fatty polyamide fibers such as nylon 66, nylon 6, nylon 46, aromatic polyamide fibres such as polyamide-based fiber from raw material; Polypropylene fiber or polyethylene terephthalate, polybutylene terephthalate (PBT) etc.Polyester fiber.As other raw material, also can use Wholly aromatic polyester fiber, superhigh molecular weight polyethylene fibers, PPS fiber, polyether ketone fiber etc., if consider, preferentially choose polyester fiber or polyamide fiber from the cost aspect.In order to improve the processability of long filament in weaving process or after-processing technology, these fibers can contain various additives, for example antistatic additive, antioxidant, fire retardant, lubricant etc. in addition.The fineness that constitutes air bag long filament of the present invention is 100-1000dtex, and monofilament fineness is 0.1-10dtex.Preferred fineness is the long filament of 300-700dtex; when total fineness the time less than 300dtex; safe air bag fabric is good performance aspect folding property and taking in property; but can reduce the brute force of air bag owing to the increase of monofilament radical in the long filament; it can not satisfy the requirement of safe air bag fabric to brute force fully, air bag be broken upon deployment cause losing protective effect.Because automobile kind and the different employed fabrics of air bag that make of adorning the position are in difference to some extent aspect the filament fineness, so will be according to the different choice at car type and position suitable filament fineness.
Safe air bag fabric among the present invention can be weaved by looms such as water jet looms, air-jet loom, Rapier loomss, does not have specific qualification for the type of loom.Fabric after weaving can be implemented by known processing methods such as HEAT SETTING, refining heat typings in the scope that does not influence the characteristic that requires among the present invention.
In addition, can also carry out coating processing to the safe air bag fabric among the present invention, but from economy, folding property and aspect such as be recycled, preferred security air bag non-coated fabric.
The present invention mainly is from safe air bag fabric itself, and the effect that makes full use of thin fibrillation monofilament reduces the gas permeability of safe air bag fabric and the slippage resistance of raising fabric self, improves the slippage resistance of making between position and fabric with this.Safe air bag fabric of the present invention has high slippage resistance and has low-permeable.
The invention will be further described below in conjunction with embodiment.
The specific embodiment:
As follows in this specification with following embodiment, the performance test methods described in the comparative example.
[slippage resistance]
Testing standard according to ASTM D6479-02 slippage resistance is tested.Concrete method of testing is as follows: the sample of 5 * 30 (cm) is being clipped on the device of slippage resistance test special use on the tension test instrument, the chuck spacing of tension test instrument is 20cm, with speed test.
[air permeability]
On the high-pressure process permmeter, carry out this test.Concrete method of testing is as follows: draw 13 of the circular specimens that diameter is 10cm successively along the fabric width direction of fabric, the air permeability of each sample of test under the pressure of 19.6KPa then, the most last result of the test of mean value of 9 data in the middle of getting at last.
[TENSILE STRENGTH]
TENSILE STRENGTH according to the stretching test method test fabric of JIS K-6404 fabric.Concrete method of testing is as follows: (4 * 25cm) sandwich in the tension test view folder mouth, and the folder mouth distance of tension test view is 15cm, tests with the test speed of 200mm/min adopting the sample that pulls limit sliver sample method and obtain on the fabric.
Embodiment 1
The employing fibre fineness is that 350dtex/136f, intensity are that 8.46cN/dtex, percentage elongation are 26% circular cross-section nylon 66 long filaments, is the air bag plain cloth of 59/inch with the water jet looms weaving density.Place of safety gas cell fabric after weaving is carried out HEAT SETTING post processing processing.Safe air bag fabric the results are shown in Table 1 after the processing.
Embodiment 2
The employing fibre fineness is 470dtex, and the monofilament radical is 72f, 120f, 136f, 144f, and intensity is that 8.47cN/dtex, percentage elongation are 26% circular cross-section nylon 66 long filaments, is being the air bag plain cloth of 57/inch with the water jet looms weaving density.Place of safety gas cell fabric after weaving is carried out HEAT SETTING post processing processing.Safe air bag fabric the results are shown in Table 1 after the processing.
Embodiment 3
The employing fibre fineness is that 580dtex/136f, intensity are that 8.0cN/dtex, percentage elongation are 25% circular cross-section nylon 66 long filaments, is the air bag plain cloth of 44/inch with the water jet looms weaving density.Place of safety gas cell fabric after weaving is carried out HEAT SETTING post processing processing.Safe air bag fabric the results are shown in Table 1 after the processing.
Table 1 safe air bag fabric performance table
Adopt the LDPF long filament of circular cross section to weave and after post processing, can obtain having the safe air bag fabric of high slippage resistance and low air permeability as can be seen from Table 1.
Embodiment 4
The employing fibre fineness is that 470dtex/72f, intensity are that 8.4cN/dtex, percentage elongation are that 26% circular cross section nylon 66 long filaments are the air bag plain cloth of 49 and 53/inch with the water jet looms weaving density.Place of safety gas cell fabric after weaving is carried out HEAT SETTING post processing processing.Safe air bag fabric the results are shown in Table 2 after the processing.
Comparative example 1
The employing fibre fineness is that 470dtex/96f, intensity are that 7.94cN/dtex, percentage elongation are 24.5% pancake section Tynex, is the air bag plain cloth of 49 and 53/inch with the water jet looms weaving density.Place of safety gas cell fabric after weaving is carried out HEAT SETTING post processing processing.Safe air bag fabric the results are shown in Table 2 after the processing.
Table 2 safe air bag fabric performance table
Have lower gas permeability though can find the fabric that uses flat section silk to obtain from table 2, compare with the slippage resistance of circular cross section silk fabrics, the slippage resistance of flat section silk fabrics seems very little.Therefore the anti-slipping property of the woven safe air bag fabric non-constant that will become thus can not satisfy the requirement of the gas generator of high-output power.
Embodiment 5:
A kind of non-coated fabric that is used for air bag is weaved by synthetic fiber filament and to be formed,
(1) contains 50-500 root (50,250,300 of examples) monofilament in the fabric in the long filament of synthetic fiber;
(2) cross section of synthetic fiber filament is a circular cross-section in the fabric;
(3) monofilament fineness is in the synthetic fiber: 0.10-10dtex (routine 0.10dtex, 5dtex, 10dtex).
The fineness of synthetic fiber filament is 100～1000dtex (routine 100dtex, 500dtex, 1000dtex).The warp-wise slippage resistance of fabric is 300-1000N (routine 300N, 700N, 1000N), and the slippage resistance of broadwise is 250-900N (routine 250N, 600N, 900N).When pressure was 19.6KPa, the air permeability of fabric was＜2.5L/cm
2/ min.The theoretical coverage coefficient (CF) that calculates fabric according to following formula is 2000-2600 (example 2000,2300,2600)
N
W: the warp-wise density of fabric (root/inch)
D
W: the fineness of warp-wise long filament (dtex) in the fabric
N
F: the latitudinal density of fabric (root/inch)
D
F: the fineness of broadwise long filament (dtex) in the fabric.
The warp tensile strength of fabric is: 550-1000N/cm (routine 550N/cm, 800N/cm, 1000N/cm), the TENSILE STRENGTH of broadwise is: 550-950N/cm (routine 550N/cm, 700N/cm, 950N/cm).
Claims (6)
1. non-coated fabric that is used for air bag is weaved by synthetic fiber filament and to be formed, and it is characterized in that:
(1) contains 50-500 root monofilament in the fabric in the long filament of synthetic fiber;
(2) cross section of synthetic fiber filament is a circular cross-section in the fabric;
(3) monofilament fineness is in the synthetic fiber: 0.10-10dtex.
2. the non-coated fabric of air bag according to claim 1, it is characterized in that: the warp-wise slippage resistance of fabric is 300-1000N, and the slippage resistance of broadwise is 250-900N.
3. air bag non-coated fabric according to claim 1 and 2 is characterized in that: when pressure was 19.6KPa, the air permeability of fabric was＜2.5L/cm
2/ min.
4. air bag non-coated fabric according to claim 1 and 2 is characterized in that: the theoretical coverage coefficient (CF) that calculates fabric according to following formula is 2000-2600
N
W: the warp-wise density of fabric (root/inch)
D
W: the fineness of warp-wise long filament (dtex) in the fabric
N
F: the latitudinal density of fabric (root/inch)
D
F: the fineness of broadwise long filament (dtex) in the fabric.
5. the non-coated fabric of air bag according to claim 1 and 2, it is characterized in that: the warp tensile strength of fabric is: 550-1000N/cm, the TENSILE STRENGTH of broadwise is: 550-950N/cm.
6. the non-coated fabric of air bag according to claim 1 and 2, it is characterized in that: the fineness of synthetic fiber filament is 100～1000dtex.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2006101664927A CN101205650A (en) | 2006-12-19 | 2006-12-19 | Non-coating fabric of safety gas-bag |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101664927A CN101205650A (en) | 2006-12-19 | 2006-12-19 | Non-coating fabric of safety gas-bag |
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| CN101205650A true CN101205650A (en) | 2008-06-25 |
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ID=39566123
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| CNA2006101664927A Pending CN101205650A (en) | 2006-12-19 | 2006-12-19 | Non-coating fabric of safety gas-bag |
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| CN101666007B (en) * | 2008-09-01 | 2012-11-07 | 东丽纤维研究所（中国）有限公司 | Fabric for safety air bag |
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| CN101748542B (en) * | 2008-12-18 | 2013-12-11 | 东丽纤维研究所（中国）有限公司 | Superfine fiber high-density fabric and production method thereof |
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| CN104870702A (en) * | 2012-12-17 | 2015-08-26 | 旭化成纤维株式会社 | Fabric for air bag |
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| CN105473774B (en) * | 2013-08-19 | 2018-06-19 | 旭化成株式会社 | Textile for air sacs |
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Application publication date: 20080625 |