CN204982224U - Fabric and air bag for air bag - Google Patents
Fabric and air bag for air bag Download PDFInfo
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- CN204982224U CN204982224U CN201520455681.0U CN201520455681U CN204982224U CN 204982224 U CN204982224 U CN 204982224U CN 201520455681 U CN201520455681 U CN 201520455681U CN 204982224 U CN204982224 U CN 204982224U
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Abstract
The utility model provides a fabric and air bag for air bag. The utility model relates to a developments are low ventilates characteristic excellence and interior pressure and keeps also for air bag fabric of excellent non - coating of characteristic. The utility model discloses a high density fabric for the air bag, its characterized in that, it is the fabric for the air bag by the formation of synthetic fiber multifilament yarn, and the tensile brute force of waling is 400-700N, and the average developments degree of surveing based on ASTM D6476 of ventilating (ADAP) is below the 500mms to ventilate based on the developments of this regulation survey and write music line index (Exponent) for below 1.5.
Description
Technical field
The utility model relates to air bag and fabric for safety air bag.
Background technology
In recent years, along with the raising of traffic safety consciousness, in order to ensure the safety of the passenger when motor-vehicle accident occurs, develop various air bag, thereupon, recognize the validity of this air bag, and promptly carry out practical.
Air bag launches by expanding in car in the very short time after vehicle crash and stops the passenger of movement under the reaction collided and absorb the material that passenger is protected in this impact.In this effect, need to make the throughput of the fabric of formation air bag little.In addition, in recent years, when airbag cushion launches to stop passenger, substitute intracapsular pressure is remained on necessarily to improve further for the purpose of passenger restraint, when therefore gas touches fabric, prevent the requirement that gas leaks from fabric from also improving constantly.
In the past, as the means of throughput reducing fabric, proposed the way of coating resin on fabric for safety air bag, the way of cling film on fabric for safety air bag.
But the coating of resin, the attaching of film can make the thickness of fabric increase, compactness when receiving is deteriorated, and is not suitable as fabric for safety air bag.In addition, owing to increasing the attaching operation of this kind of resin-coated operation or film, thus there is the problem that manufacturing cost improves.
Therefore, in order to solve this kind of problem, propose a kind of non-coated fabric in recent years, its by under the prerequisite not implementing resin finishing to high-density the synthesizing filament yarn (filamentyarn) such as woven polyamide fiber, polyester fiber reduce the throughput of fabric, such as, as the means realizing low aeration, disclose and use total fiber number to be that the synthesizing filament yarn of 350 ~ 470dtex carries out woven means (with reference to patent document 1) to high-density.According to these means, under test differential pressure 20kPa, reach 0.5L/cm
2the throughput of/below min.
But, the low throughput reached with these means is the static breathing characteristics of what is called under the state making differential pressure keep constant, the expansion ventilation behavior of actual fabric when air bag plays function is decided by the contact at the gases at high pressure touched instantaneously or passenger or is a greater impact, and to think in the static breathing characteristics such as inflation pressure retention the characteristic also existing and fail fully to evaluate.With regard to also absorb after passenger contacts with air bag collision energy and protect passenger in for, inflation pressure retention outbalance.
Therefore, in ASTMD6476, determine the evaluation method about dynamic aeration characteristic.
But, above-mentioned means for dynamic aeration characteristic also and insufficient.
Prior art document
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2008-81873 publication
Utility model content
The problem that utility model will solve
The purpose of this utility model is the fabric for safety air bag providing dynamic low ventilation excellent and interior pressure retention performance also excellent.Even if be especially the fabric for safety air bag and the air bag that provide the venting quality that also can maintain regulation in the dynamic change of cloth upon deployment.
For solving the means of problem
Fabric for safety air bag of the present utility model and the air bag that can solve above-mentioned problem comprise following formation.
(1) a kind of fabric for safety air bag, it is characterized in that, it is the fabric for safety air bag formed by synthetic fiber multifilament textile (multifilamentyarn), the tensile strength in twill (bias) direction is 400 ~ 800N, the average dynamic venting quality (ADAP) measured based on ASTMD6476 is below 500mm/s, and is less than 1.5 based on the dynamic aeration that this regulation measures linear index (Exponent) of writing music.
(2) fabric for safety air bag Gen Ju (1), is characterized in that, the deviation (CV%) of twill brute force is less than 15%.
(3) according to (1) or the fabric for safety air bag described in (2), it is characterized in that, the filament denier of described synthetic fiber multifilament textile is 1 ~ 4dtex, and the density of knitting of warp thread is the scope of 0.95 ~ 1.05 divided by the value of knitting density gained of weft yarn.
(4) according to the fabric for safety air bag according to any one of (1) ~ (3), wherein, the solvent extraction composition of described safe air bag fabric is less than 0.5 % by weight.
(5) according to the fabric for safety air bag according to any one of (1) ~ (4), it uses boiling water shrinkage to be that the synthetic fiber multifilament textile of less than 7% is as raw yarn.
(6) manufacture method for fabric for safety air bag, is characterized in that, after weaving and the moisture rate of fabric before drying process is adjusted to 4 ~ 30%, carries out the drying process more than 80 DEG C and at the temperature of less than 170 DEG C afterwards by utilizing water jet looms.
(7) manufacture method of the fabric for safety air bag Gen Ju (6), wherein, the processing time of described drying process is more than 10 seconds and less than 180 seconds.
(8) manufacture method of basis (5) or the fabric for safety air bag described in (6), is characterized in that, when described drying process or after drying process, do not implement heat setting.
(9) air bag, it use (1) ~ (4) according to any one of fabric for safety air bag.
Utility model effect
According to the utility model, the fabric for safety air bag that dynamic low ventilation excellent and interior pressure retention performance are also excellent can be obtained.
Accompanying drawing explanation
Fig. 1 is the figure of the waling representing fabric.
Detailed description of the invention
Fabric for safety air bag of the present utility model is formed by synthetic fiber multifilament textile.As the synthetic fiber forming synthetic fiber multifilament textile, can preferably use the long fiber multifilament textile formed by the polyamide-based fibers such as nylon 6, nylon66 fiber, nylon 46 or the polyester fiber based on polyethylene terephthalate.Wherein, preferably can use the yarn of nylon system or Polyester, and then particularly preferably be from the viewpoint of thermal capacity, flexibility the polyamide-based long fiber multifilament textile formed by nylon66 fiber or nylon 46.Polyamide-based fiber, polyester fiber, aromatic polyamide series fiber, artificial silk series fiber, polysulfones series fiber, ultra-high molecular weight polyethylene series fiber etc. can be used.Wherein, the polyamide-based fiber of preferred production or economy excellence or polyester fiber.
With regard to this synthetic fiber multifilament textile, need to guarantee the strength characteristics required by air bag, especially excellent TENSILE STRENGTH and tearing strength in, preferably make the total fiber number of the synthetic fiber multifilament textile of formation fabric be 200 ~ 500dtex.
When the total fiber number of yarn is less than 200dtex, be difficult to obtain sufficient TENSILE STRENGTH and tearing strength, thus not preferred.In addition, the fiber number being greater than 500dtex can lack the flexibility as fabric for safety air bag, and the storage to handle etc. not only can be made to be deteriorated, and becomes large possibility when air-bag deployment to the impact of passenger and also can uprise, therefore not preferred.
As the filament denier of the synthetic fiber multifilament of formation fabric for safety air bag, be preferably 1 ~ 4dtex.Namely, if form synthetic fiber multifilament textile by many long filaments, then the filling effect of fiber further improves, not only can obtain low breathing characteristics, and when Compressed Gas touches this fabric, the easily movement each other of the filament long filament in multifilament textile, multifilament textile flattened extends in fabric side, can not only landfill in order to there is the fine voids of the ventilation in multifilament textile, and effectively can seal the space in portion of knotting of fabric.As long as single thread fiber number is the scope of 1 ~ 4dtex, be more preferably 2 ~ 3.5dtex, more preferably 2.5 ~ 3.4dtex.
If single thread fiber number is less than 1dtex, then single thread force is not enough, and when weaving, especially warp thread easily causes single thread rupture, the machine stop times increase of loom and productivity ratio is deteriorated, or as the quality variation of fabric.On the other hand, if single thread fiber number becomes large and more than 4dtex, then when Compressed Gas touches, multifilament textile is difficult to flattened extend in fabric side, venting quality uprises, therefore not preferred.
In addition, the boiling water shrinkage of the raw yarn before weaving is preferably less than 7%.Can observe in highdensity fabric: adjacent yarn interval is each other close to the closeest filling, when producing contraction in refining procedure etc., yarn not only moves in the direction, face of fabric, namely with and the mode that diminishes of the interval of adjacent yarn move, and yarn is not also suppressing the direction of yarn movement, i.e. thickness direction to move.If boiling water shrinkage is greater than 7%, then yarn movement is in a thickness direction large, and therefore curling (crimp) rate becomes excessive, easily produces gap in the part of warp thread and weft yarn through-thickness overlap.Think thus: when Compressed Gas touches, even if multifilament textile flattened extends in fabric side, the space in the portion of knotting of the fine voids in multifilament textile or fabric also cannot be made effectively to narrow.The power that Compressed Gas touches, i.e. pressure are larger, and this tendency is more remarkable, and therefore dynamic aeration described later writes music linear index change greatly.Be preferably less than 6.5%, be more preferably less than 6%.Lower limit without the need to special setting, if but consider to use the raw yarn of high strength in reality, then lower limit is more than 3%, is preferably more than 4%, is more preferably more than 4.5%.
Knit density about safe air bag fabric of the present utility model, the density of knitting preferably making warp thread is the scope of 0.95 ~ 1.05 divided by the value of knitting density of weft yarn.This be due to: if knit density to take this scope, then can obtain having isotropic fabric, when Compressed Gas touches, fabric extends waiting direction, and the multifilament textile flattened extended in fabric side can the space in the more effectively portion of knotting of landfill fabric.When this value is less than 0.95, become non-isotropy fabric, be not only difficult to the space in the portion of knotting of landfill fabric, and make production efficiency also poor because needs improve weft count, thus not preferred.In addition, when this value is greater than 1.05, non-isotropy fabric is also become, not only be difficult to the space in the portion of knotting of landfill fabric, and cause warp thread phase mutual friction each other because warp count is high when weaving opening, produce lint, quality is reduced, thus not preferred.
In addition, the coverage coefficient (CF) of the fabric of being tried to achieve by following formula is preferably 1900 ~ 2300.Coverage coefficient refers to that can say that density is knitted in expression, this value is larger, represents that the gap between yarn is less, air-tightness is higher with the total fiber number of warp thread and weft yarn and their respective density to represent the index of the aeration of the fiber under web state.But reduce as the flexibility of fabric, weight becomes heavy simultaneously.That is, along with coverage coefficient diminishes, make fabric become soft, weight simultaneously, but air-tightness reduce all the more.Therefore, in order to not only guarantee the flexibility of appropriateness but also guarantee sufficient air-tightness (low aeration), need the CF value determining appropriateness, the utility model people etc. confirms it, found that: have above-mentioned two characteristics concurrently when this CF value is the scope of 1900 ~ 2300.By making coverage coefficient be more than 1900, low aeration can be obtained.In addition, by making coverage coefficient be less than 2300, closely storage property can be improved.
CF=(total fiber number (dtex) × 9/10 of the warp thread untied)
1/2× warp count (root/2.54cm)+(total fiber number (dtex) × 9/10 of the weft yarn untied)
1/2× weft count (root/2.5cm)
As woven method, be not particularly limited, if consider the uniformity of fabric physical property, then plain weave is better, loom is not particularly limited as spies such as air-jet loom (AJL), Rapier looms (RL), water jet loomss (WJL), if consider from weaving efficiency, then preferred water jet looms.
In addition, the tensile strength of the waling of fabric for safety air bag of the present utility model is (below, powerful also referred to as twill.) be preferably the scope of 400 ~ 800N.At this, waling is with the warp thread of fabric and the half angle of weft yarn angulation and the direction of warp yarns.In the case of webs, because warp thread and weft yarn angulation are about 90 degree, therefore waling becomes the direction that relative warp thread departs from about 45 degree.The tensile strength of waling represents the intensity that the multifilament textile forming fabric is wound around each other, if the tensile strength of waling is this scope, then when Compressed Gas touches, only filament long filament is moved and multifilament textile self can not move, and is the space in portion of knotting that flat multifilament textile seals fine voids in multifilament textile, fabric effectively to fabric.When the tensile strength of waling is less than 400N, multifilament textile mutual winding is each other weak, causes multifilament textile to move when Compressed Gas touches, and the space in the portion of knotting of fabric becomes large, therefore not preferred.On the other hand, if the tensile strength of waling is greater than 800N, then multifilament textile being mutually wrapped over each other is strong, even the movement of single thread long filament also can be hindered, thus not preferred.Be more preferably 450 ~ 700N.
And then with regard to the utility model, the deviation (CV%) of the tensile strength of waling is preferably less than 15%, is more preferably less than 10%.Deviation described herein (CV%) is multiplied by 100 times and the value calculated divided by mean value again for the standard deviation determining the measured value of 10, the sample of twill brute force.If CV (%) is greater than 15%, then the deviation change of twill brute force is large, and its result upon deployment stress concentrates on the powerful low part of twill, thus there is the possibility that pinprick offsets or pinprick opens producing sewing unit, therefore not preferred.
In addition, find: in order to the tensile strength of waling being set in the scope of regulation, the refining of fabric, dry time condition outbalance.Namely, think that the tensile strength of waling represents " the mobile difficulty or ease of the yarn " degree under the interaction of warp thread and weft yarn, and find not only to be subject to total fiber number, filament denier, to knit the impact of density, but also be subject to solvent extraction component amount, longitude and latitude the contraction of yarn time the impact of condition of tension force, reach the application's utility model thus.
In the application's utility model, as the cloth carried out before drying, need to make moisture rate be 4% ~ 30% scope.By setting the moisture rate of this scope, making cloth during drying be subject to dry process equably, therefore, it is possible to carry out uniform drying, contraction to fabric unit, thus becoming the cloth averaged out.When moisture rate is less than 4%, the drying of the heat in drying machine to cloth is utilized to become uneven.Especially the drying in selvedge side is carried out in advance, and therefore the crimp percent of weft direction becomes large, causes the reduction of twill brute force.Be preferably more than 4.5%, be more preferably more than 5%.When moisture rate more than 30%, in order to carry out sufficient drying, not only need a large amount of heats, and make drying become uneven, now also cause the reduction of twill brute force.Be preferably less than 25%, be more preferably less than 20%.
The moisture rate of the fabric before drying can be reached in the adjustment of carrying out moisture of the fabric by weaving WJL, after refining treatment.When water deficient, can adjust by giving water, when amount of moisture is many, water can be blown away to utilize air stream or the mode that absorbs water adjusts.In addition, utilize and often be there is by the dewatered method of ironer process used the problem producing wrinkle when resin finishing, utilize the reinforcing of the pressure of ironer to the intersection point of fabric to become uneven simultaneously, make twill brute force become uneven, thus not preferred.
With regard to the application's utility model, the temperature of drying machine is preferably lower temperature.But if too low, then drying cannot be carried out fully, be therefore preferably more than 80 DEG C.Be more preferably more than 100 DEG C, more preferably more than 110 DEG C.If baking temperature is too high, then the especially selvedge side in drying machine produces uneven drying, and twill brute force is reduced.Be preferably less than 170 DEG C, be more preferably less than 160 DEG C, more preferably less than 150 DEG C.In addition, about the processing time, as long as carry out dry condition with baking temperature × processing time to cloth, then and no problem, if at high temperature carry out longer time-triggered protocol, then the twill brute force of cloth reduces, therefore not preferred.Be less than 180 seconds by the time in drying machine, be more preferably less than 120 seconds, more preferably less than 90 seconds.
By the moisture rate of the fabric before drying being set as the scope specified, fabric unit can be made dry equably.Based on this phenomenon, form the contraction of the yarn of fabric, be stretching in width and occur simultaneously, therefore yarn itself is configured in optimum position.Find that there is the effect that the twill of fabric self brute force is uprised thus, thus reach the application's utility model.
With regard to the cloth after weaving, air bag of the present utility model does not preferably implement the heat setting usually often carried out non-coated base fabric.If enforcement heat setting, then form the yarn bar heat shrinkable of fabric, fibre bundle self is collected, produce the gap between Fiber-Fiber, therefore not preferred in low aeration.In addition, owing to not implementing heat setting, therefore can simplify manufacturing process, thus also there is the advantage making manufacturing cost step-down.Even if also can carry out refining procedure after weaving, but refining procedure is preferably by the tepidarium of 20 ~ 100 DEG C.
The solvent extraction composition of fabric for safety air bag of the present utility model is preferably less than 0.5 % by weight.If be greater than 0.5 % by weight, then utilize this lubrication that above-mentioned twill brute force is diminished, thus not preferred.Be preferably less than 0.3 % by weight, be more preferably less than 0.1 % by weight.
The average dynamic venting quality (ADAP) that fabric for safety air bag of the present utility model measures based on ASTMD6476 is preferably below 500mm/s.Be more preferably below 400mm/s, more preferably below 300mm/s.If be set as within the scope of this, then stop during passenger in airbag cushion expansion and can do one's utmost to suppress gas to be revealed from fabric, the interior pressure of air bag can be kept.About this mensuration, abrupt release is filled in the compressed air of test head and touches the sample of fabric, measure the venting quality (dynamic aeration degree) corresponding with the pressure gradually changed, calculate the average ventilation of the dynamic aeration degree in the scope between the pressure upper limit after reaching maximum pressure (UPPERLIMIT) ~ threshold pression (LOWERLIMIT).The method of the leakage of the air after reaching about mensuration maximum pressure, represents to retraining passenger and completing the inflation pressure retention constraint passenger after air-bag deployment, completely different from the static venting quality of the venting quality be determined under a certain point pressure.About the condition determination of average dynamic venting quality (ADAP) of the present utility model, adjust compressed-air actuated pressure according to the mode making maximum pressure reach 100 ± 5kPa, and be set to that the threshold pression calculating average dynamic venting quality is 30kPa and pressure upper limit is the passenger restraint of the reality of 70kPa time the scope of interior pressure of air bag.
In addition, fabric for safety air bag of the present utility model is less than 1.5 outbalances based on the dynamic aeration that ASTMD6476 measures linear index (Exponent) of writing music, and is preferably less than 1.4, is more preferably less than 1.3.Dynamic aeration linear index (Exponent) of writing music is the exponent E of line gained of writing music from the pressure-dynamic aeration utilizing the mensuration of above-mentioned average dynamic venting quality to obtain, and the air bag Special ventilating testing machine FX3350 of TEXTEST company can be utilized to calculate.The utility model people etc. conduct in-depth research with the relation of the air bag inflation pressure retention launched when stoping afterwards passenger at airbag cushion dynamic aeration linear index of writing music, and found that dynamic aeration linear index of writing music is less than 1.5 for air bag inflation pressure retention outbalance.
Below dynamic aeration linear index of writing music is described in detail.If dynamic aeration is write music, linear index is 1.0, then no matter how substitute intracapsular pressure changes, and all shows certain venting quality.If dynamic aeration is write music, linear index is greater than 1.0, then along with the increase of substitute intracapsular pressure, demonstrate venting quality and rise.If dynamic aeration is write music, linear index is less than 1.0, then along with the increase of substitute intracapsular pressure, demonstrate venting quality and reduce.Usually, average dynamic venting quality is less, and dynamic aeration linear index of writing music is larger.That is, can by the stream of air if having, then this stream expands along with the increase of substitute intracapsular pressure, means that venting quality rises.If the expansion of air bag makes the air bag of expansion touch passenger, then the pressure of air bag inside increases, pressure increase causes the increase of venting quality, therefore, compared with the fabric that linear index of writing music with dynamic aeration is low, the write music loss of inflator gas (inflatorgas) of the high fabric of linear index of dynamic aeration becomes large.
Fabric for safety air bag of the present utility model is characterized as: although average dynamic venting quality is little, and dynamic aeration linear index of writing music is little.If dynamic aeration is write music, linear index is greater than 1.5, then, when passenger touches air bag and the pressure of air bag inside is increased, the increase of venting quality occurs, and the loss of inflator gas becomes excessive, therefore not preferred.
In addition, the tensile strength of fabric for safety air bag of the present utility model is more than 500N/cm at warp thread direction, weft direction is ideal.Be preferably more than 550N/cm, be more preferably more than 600N/cm.When air bag works, air bag is because of fabric intensity when breakage, stress concentrates on intensity lowermost portion and has damaged tendency.In other words, as long as the minimum intensity of fabric meets required intensity, then breakage can be prevented.
By using the fabric of the application's utility model, expanding performance when making air bag can be improved.That is, for dynamic aeration degree during air-bag deployment, do not hinder the movement of yarn (single thread) and multifilament each other with flat configuration, effectively can seal fabric and to knot the space in portion.The improvement of expanding performance described herein refers to: even if the raising of fabric burst pressure during expansion, the shortening of duration of run also when using the inflator of high pressure can carry out tackling with the air bag of equal powerful raw yarn in the past to use and are not that the air bag employing high-tenacity raw yarn is tackled.
Embodiment
Below, enumerate embodiment to further illustrate the utility model, but the utility model is not certainly by the restriction of following embodiment, and implement after can certainly being changed in the scope meeting context purport, they are all included in technical scope of the present utility model.In addition, the test method(s) of the various performances adopted in the following embodiments is as described below.JIS uses 1999 annual versions.
Raw yarn boiling water shrinkage: by raw yarn with the sampling of Guang (Japanese original text: カ セ) shape, 20 DEG C, the humiture of 65%RH adjusts indoor adjustment more than 24 hours, applies the load being equivalent to 0.045cN/dtex, measured length L0 to sample.Then, after this sample is flooded 30 minutes with tension-free state in boiled water, adjust room-dry 4 hours in above-mentioned humiture, again the load being equivalent to 0.045cN/dtex is applied to sample, measured length L1.Boiled water shrinkage factor is obtained according to the following formula by respective length L0 and L1.
Boiled water shrinkage factor=[(L0-L1)/L0] × 100 (%)
Form the total fiber number of yarn:: measure according to JISL1096 annex 14-A method.
Form the long filament number of yarn: utilize stereoscope amplify the section of yarn and take it, from this cross sectional photograph counting long filament number.
Single thread fiber number: use the value obtained from total fiber number removing long filament number.
Knit density: measure based on JISL1096:19998.6.1.Sample is placed on smooth platform, removes factitious wrinkle, tension force, to the warp thread in interval and the radical of weft yarn of different 5 position counting 1 inch (2.54cm), calculate respective mean value.
Coverage coefficient (CF): represent with following formula.
CF=(total fiber number (dtex) × 9/10 of the warp thread untied)
1/2× warp count (root/2.54cm)+(total fiber number (dtex) × 9/10 of the weft yarn untied)
1/2× weft count (root/2.5cm)
(7) intensity of fabric: according to JISL1096:19998.12.1A method (cloth strength and elongation test method), respectively determination test has been carried out to warp thread direction and weft direction.Take each 5 of test film, yarn is removed from the both sides of cloth width, cloth width is 50mm, utilizing constant speed to draw strength tester stretches until its fracture to test film with grip separation 200mm, draw speed 200mm/min, measure the maximum load till fracture, and to longitudinal and horizontal calculating mean value respectively.
(8) twill is powerful: be set to waling by with the straight line of the warp yarns of the angle of 45 degree and fabric, cut wide 30mm, long 150mm along waling.Constant speed is utilized to draw strength tester with grip separation 50mm, draw speed 50mm/min to sample determination maximum load.In addition, from full width (the weft direction) × warp thread direction 1m of cloth, carry out 10 samplings at random, calculate its mean value and deviation (CV%).In addition, CV% is multiplied by 100 times to calculate divided by mean value by the standard deviation of 10 measured values again.
(9) average dynamic venting quality dynamic aeration is write music linear index: measure based on ASTMD6476.Use the air bag Special ventilating testing machine FX3350 of TEXTEST company, test head adopts 200cm
3.In addition, the compressed-air actuated pressure (STARTPRESSURE) being filled in test head adjusts according to the mode making the maximum pressure putting on fabric reach 100 ± 5kPa.
Release is filled in the compressed air of test head, the sample of itself and fabric is touched, time dependent ground measures pressure and venting quality, obtain gained pressure-dynamic aeration write music maximum pressure in line arrive after pressure upper limit (UPPERLIMIT:70kPa) ~ threshold pression (LOWERLIMIT:30kPa) scope in the mean value of dynamic aeration degree as average dynamic venting quality (ADAP).In addition, to write music linear index (Exponent) from the pressure-dynamic aeration of gained line computation dynamic aeration of writing music.
(10) moisture rate before drying machine:
The cloth being about to put into drying machine is cut, uses this cloth to measure according to JISL10968.9.In addition, 3 points (central portion 1 point, selvedge end 2 point) of the diverse location in cloth width direction are measured.
(11) the solvent extraction composition of fabric:
Measure according to JISL10968.36.In addition, as extractant, employ n-hexane.
(12) air-bag deployment test:
Air bag is made: make the air bag recorded in International Publication No. 99/28164 brochure.But periphery is made and is adopted the 2 row double-locked stitch that suture is 1470dtex, number of handling the needle is 5.0 pins/cm.Air vent is not set.The air bag of gained is folded according to the method recorded in International Publication No. 01/9416 brochure, after the state that the rubber ring making it maintain to be commercially available draws in, is installed to deployment opening.
As utilizing the expansion of inflator to test, employ the safety air bag test device (her rattan essence mechanism) with nitrogen filling capacity.In addition, when using the air bag of 60L, launch under the condition that maximum pressure is between 60 ~ 70kPa, the state of the sewing unit of the air bag after expansion is confirmed.
◎: make the pinprick skew of part within 1mm.
Zero: make part exist produce pinprick be the part of 1mm ~ 3mm.
△: there is pinprick and open part for 3mm ~ 5mm making part.
×: the shape not keeping air bag after deployment, or exist and produce pinprick skew and be greater than the part of 5mm making part.
(embodiment 1): by the multifilament textile (boiling water shrinkage 5.7%) of the 475dtex/140 root formed by nylon66 fiber to be used as warp thread and weft yarn without twisted state, water jet looms (WJL) is utilized to weave flat fabric, carry out refining, drying, produce the fabric of 53.4 pieces/inch, warp thread, weft yarn 52.8 pieces/inch, coverage coefficient (CF) 2196.In addition, pressure-air is blowed and sprayed to the fabric before drying and except anhydrating, being adjusted to moisture rate is 7%.The physical property of the fabric of gained is shown in table 1.From table 1 clearly: the dynamic low aeration of this fabric and inflation pressure retention excellence are very excellent fabric for safety air bag.
(embodiment 2): by the multifilament textile (boiling water shrinkage 6.2%) of the 353dtex/192 root formed by nylon66 fiber to be used as warp thread and weft yarn without twisted state, WJL is utilized to weave flat fabric, carry out refining, drying, produce the fabric of 63.0 pieces/inch, warp thread, weft yarn 60.5 pieces/inch, coverage coefficient (CF) 2201.In addition, use vacuum plant to attract removing moisture to the fabric before drying, being adjusted to moisture rate is 15%.The physical property of the fabric of gained is shown in table 1.From table 1 clearly: the dynamic low aeration of this fabric and inflation pressure retention excellence are very excellent fabric for safety air bag.
(embodiment 3): by the multifilament textile (boiling water shrinkage 5.2%) of the 470dtex/144 root formed by nylon66 fiber to be used as warp thread and weft yarn without twisted state, WJL is utilized to weave flat fabric, carry out refining, drying, produce the fabric of 49.0 pieces/inch, warp thread, weft yarn 49.0 pieces/inch, coverage coefficient (CF) 2016.In addition, use vacuum plant to attract removing moisture to the fabric before drying, being adjusted to moisture rate is 8%.The physical property of the fabric of gained is shown in table 1.From table 1 clearly: the dynamic low aeration of this fabric and inflation pressure retention excellence are very excellent fabric for safety air bag.
(embodiment 4): by the multifilament textile (boiling water shrinkage 6.5%) of the 225dtex/108 root formed by nylon66 fiber to be used as warp thread and weft yarn without twisted state, WJL is utilized to weave flat fabric, carry out refining, drying, produce the fabric of 73.4 pieces/inch, warp thread, weft yarn 73.8 pieces/inch, coverage coefficient (CF) 2095.In addition, use vacuum plant to attract removing moisture to the fabric before drying, being adjusted to moisture rate is 4.7%.The physical property of the fabric of gained is shown in table 1.From table 1 clearly: the dynamic low aeration of this fabric and inflation pressure retention excellence are very excellent fabric for safety air bag.
(comparative example 1): by the multifilament textile (boiling water shrinkage 9.5%) of the 481dtex/144 root formed by nylon66 fiber to be used as warp thread and weft yarn without twisted state, WJL is utilized to weave flat fabric, carry out refining, drying, produce the fabric of 53.2 pieces/inch, warp thread, weft yarn 52.9 pieces/inch, coverage coefficient (CF) 2208.The physical property of the fabric of gained is shown in table 1.From table 1 clearly: for this fabric, because the boiling water shrinkage of raw yarn is high, dry before moisture rate up to 33%, therefore obtain uneven when drying to the thermal change that fabric applies, the contraction of result fabric also becomes uneven, thus makes deviation become large.Result: although the mean value of twill brute force is high, deviation becomes excessive, therefore in expansion test, stress concentrates on the powerful low part of twill, produces the pinprick skew of the sewing unit of maximum 3.6mm.
(comparative example 2): by the multifilament textile (boiling water shrinkage 9.8%) of the 472dtex/72 root formed by nylon66 fiber to be used as warp thread and weft yarn without twisted state, WJL is utilized to weave flat fabric, carry out refining, drying, produce the fabric of 55.5 pieces/inch, warp thread, weft yarn 54.5 pieces/inch, coverage coefficient (CF) 2267.The physical property of the fabric of gained is shown in table 1.Clearly known by table 1: because the single thread fiber number forming the multifilament textile of this fabric is large, the venting quality of fabric to be uprised, and produce higher shrinkage factor, increase because of the reduction of twill brute force caused by temperature height during drying and the deviation of twill brute force, in expansion test, produce the pinprick skew of the sewing unit of maximum 4.8mm.
(comparative example 3): by the multifilament textile (boiling water shrinkage 6.2%) of the 353dtex/192 root formed by nylon66 fiber to be used as warp thread and weft yarn without twisted state, WJL is utilized to weave flat fabric, carry out refining, drying, produce the fabric of 55.0 pieces/inch, warp thread, weft yarn 63.0 pieces/inch, coverage coefficient (CF) 2103.The physical property of the fabric of gained is shown in table 1.From table 1 clearly: for this fabric, because weft count is much larger than warp count, be therefore short of isotropism, thus be difficult to the space in the portion of knotting of landfill fabric and twill brute force also reduces, produce larger pinprick skew in sewing unit thus.
(comparative example 4): by the multifilament textile (boiling water shrinkage 6.5%) of the 225dtex/108 root formed by nylon66 fiber to be used as warp thread and weft yarn without twisted state, WJL is utilized to weave flat fabric, blow and spray pressure-air except anhydrating to the fabric before drying, being adjusted to moisture rate is 8%.As drying condition, the state that the latitude width of the cloth before relatively dry widens 0.5% is fixed, and makes, in its stove by 180 DEG C × 120s, to carry out so-called heat setting.The density of knitting of gained fabric is 71.8 pieces/inch, warp thread, weft yarn 73.5 pieces/inch, and coverage coefficient (CF) is 2068.The physical property of the fabric of gained is shown in table 1.By this heat-set treatment, make twill brute force too high, result makes venting quality degradation.This be due to: by heat setting, thus become the condition of warp thread, weft yarn excessively being given to tension force.Because the intersection point of longitude and latitude is suppressed, thus twill brute force uprises, but, warp thread, weft yarn self can not make single thread long filament broaden because of tension force, cannot space between landfill yarn-yarn, cause venting quality to be deteriorated thus, 2 positions of making part of air bag after deployment produce the pinprick skew being greater than 5mm.
(comparative example 5): by the multifilament textile (boiling water shrinkage 5.7%) of 475dtex/140 root that formed by nylon66 fiber to be used as warp thread and weft yarn without twisted state, utilize AJL to weave flat fabric.Safety air sac cloth is obtained under the prerequisite of not carrying out refining, drying, heat setting etc.Knitting density is 52.1 pieces/inch, warp thread, weft yarn 51.9 pieces/inch, and coverage coefficient (CF) is 2150.The physical property of the fabric of gained is shown in table 1.For this cloth, raw yarn finish residue 0.63%, causes the intersection point between longitude and latitude easily to slide thus, and twill brute force reduces.Therefore, result is: the value of average dynamic venting quality (ADAP) is high, and dynamic aeration writes music linear index (Exponent) more than 1.5.In addition, because twill brute force reduces, the sewing unit of the air bag after launching is caused to produce significantly pinprick skew thus.
[table 1]
Utilizability in industry
The utility model is by determining to form the boiling water shrinkage of the total fiber number of multifilament textile of fabric, single thread fiber number and raw yarn, and determine further fabric to knit density and twill powerful, thus dynamic low ventilation excellent and the also excellent fabric for safety air bag of interior pressure retention performance can be obtained.
Symbol description
1 fabric for safety air bag
2 fabrics
3 warp thread
4 weft yarns
The line of 5 expression warp thread directions
The line of 6 expression weft directions
The line of 7 expression walings.
Claims (10)
1. a fabric for safety air bag, it is characterized in that, it is the fabric for safety air bag formed by synthetic fiber multifilament textile, the tensile strength of waling is 400 ~ 800N, the average dynamic venting quality (ADAP) measured based on ASTMD6476 is below 500mm/s, and is less than 1.5 based on the dynamic aeration that this regulation measures linear index (Exponent) of writing music.
2. fabric for safety air bag according to claim 1, is characterized in that, the deviation (CV%) of twill brute force is less than 15%.
3. fabric for safety air bag according to claim 1 and 2, is characterized in that, the filament denier of described synthetic fiber multifilament textile is 1 ~ 4dtex, and the density of knitting of warp thread is the scope of 0.95 ~ 1.05 divided by the value of knitting density gained of weft yarn.
4. fabric for safety air bag according to claim 1 and 2, wherein, the solvent extraction composition of described safe air bag fabric is less than 0.5 % by weight.
5. fabric for safety air bag according to claim 3, wherein, the solvent extraction composition of described safe air bag fabric is less than 0.5 % by weight.
6. fabric for safety air bag according to claim 1 and 2, it uses boiling water shrinkage to be that the synthetic fiber multifilament textile of less than 7% is as raw yarn.
7. fabric for safety air bag according to claim 3, it uses boiling water shrinkage to be that the synthetic fiber multifilament textile of less than 7% is as raw yarn.
8. fabric for safety air bag according to claim 4, it uses boiling water shrinkage to be that the synthetic fiber multifilament textile of less than 7% is as raw yarn.
9. fabric for safety air bag according to claim 5, it uses boiling water shrinkage to be that the synthetic fiber multifilament textile of less than 7% is as raw yarn.
10. an air bag, it uses the fabric for safety air bag according to any one of Claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520455681.0U CN204982224U (en) | 2015-06-29 | 2015-06-29 | Fabric and air bag for air bag |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520455681.0U CN204982224U (en) | 2015-06-29 | 2015-06-29 | Fabric and air bag for air bag |
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| Publication Number | Publication Date |
|---|---|
| CN204982224U true CN204982224U (en) | 2016-01-20 |
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| CN201520455681.0U Active CN204982224U (en) | 2015-06-29 | 2015-06-29 | Fabric and air bag for air bag |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106319720A (en) * | 2015-06-29 | 2017-01-11 | 东洋纺株式会社 | Safe air bag fabric, manufacturing method thereof, and safe air bag |
| US20220049383A1 (en) * | 2018-09-19 | 2022-02-17 | Toray Industries, Inc. | Non-coated base fabric for airbag, airbag, and manufacturing method of non-coated base fabric for airbag |
-
2015
- 2015-06-29 CN CN201520455681.0U patent/CN204982224U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106319720A (en) * | 2015-06-29 | 2017-01-11 | 东洋纺株式会社 | Safe air bag fabric, manufacturing method thereof, and safe air bag |
| US20220049383A1 (en) * | 2018-09-19 | 2022-02-17 | Toray Industries, Inc. | Non-coated base fabric for airbag, airbag, and manufacturing method of non-coated base fabric for airbag |
| US11761126B2 (en) * | 2018-09-19 | 2023-09-19 | Toray Industries, Inc. | Non-coated base fabric for airbag, airbag, and manufacturing method of non-coated base fabric for airbag |
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