CN106319720A - Safe air bag fabric, manufacturing method thereof, and safe air bag - Google Patents
Safe air bag fabric, manufacturing method thereof, and safe air bag Download PDFInfo
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- CN106319720A CN106319720A CN201510368890.6A CN201510368890A CN106319720A CN 106319720 A CN106319720 A CN 106319720A CN 201510368890 A CN201510368890 A CN 201510368890A CN 106319720 A CN106319720 A CN 106319720A
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Abstract
The invention relates to a non-coating safe air bag fabric having excellent dynamic low air permeability character and excellent internal pressure retaining character. The safe air bag high-density fabric is characterized in that the safe air bag high-density fabric is formed by synthetic fiber multifilament yarns; the tensile strength force in the bias direction is 400-700 N; the average dynamic air permeability (ADAP) measured based on an ASTM D6476 is less than 500 mm/s; and the dynamic air permeability curve index (Exponent) measured based on the stipulation is less than 1.5.
Description
Technical field
The present invention relates to air bag and fabric for safety air bag and manufacture method thereof.
Background technology
In recent years, along with the raising of traffic safety consciousness, in order to ensure the passenger when motor-vehicle accident occurs
Safety, develop various air bag, therewith, it is understood that the effectiveness of this air bag, and fast
Carry out practical fastly.
Air bag is to stop by expanding expansion in car in the very short time after vehicle crash
The passenger of movement absorb this impact to protect the material of passenger under the retroaction collided.At this work
By aspect, need the ventilation making the fabric of composition air bag little.It addition, in recent years, to enter one
When airbag cushion launches to stop passenger by substitute for the purpose of step improves passenger restraint
Intracapsular pressure is maintained at more than certain, and therefore gas prevents the requirement that gas leaks from fabric when touching fabric
Also improve constantly.
In the past, as the means of the ventilation reducing fabric, it is proposed that be coated with on fabric for safety air bag
The way of cloth resin, on fabric for safety air bag, attach the way of film.
But, the coating of resin, the attaching of film can make the thickness of fabric increase, compactness when receiving
It is deteriorated, is not suitable as fabric for safety air bag.Further, since increase this kind of resin-coated operation or
The attaching operation of film, thus there is the problem that manufacturing cost improves.
Therefore, in order to solve this kind of problem, proposing a kind of non-coating cloth in recent years, it is not by
Implement on the premise of resin processing the synthesizing filament yarn such as woven polyamide fiber, polyester fiber to high-density
(filament yarn) reduces the ventilation of fabric, such as, as realizing the means of low aeration,
Disclose the synthesizing filament yarn using total fiber number to be 350～470dtex and carry out the most woven hands
Section (with reference to patent documentation 1).According to these means, under test differential pressure 20kPa, reach 0.5L/cm2/min
Following ventilation.
But, the low ventilation reached with these means is the institute when making differential pressure keep constant
The static breathing characteristics of meaning, the expansion ventilation behavior of actual fabric during air bag function by
Gases at high pressure or the contact of passenger that moment touches determine or are a greater impact, and think
There is also, in the static breathing characteristics such as inflation pressure retention, the characteristic failing fully to evaluate.Just passenger with
Also the energy of collision is absorbed and for protecting the aspect of passenger, inflation pressure retention is relatively after air bag contact
For important.
Therefore, ASTM D6476 determines the evaluation methodology about dynamic aeration characteristic.
But, above-mentioned means are gone back and insufficient for dynamic aeration characteristic.
Prior art literature
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 2008-81873 publication
Summary of the invention
The problem that invention is to be solved
It is an object of the invention to provide dynamic low ventilation excellent and intrinsic pressure retention performance is the most excellent
Different fabric for safety air bag.Even if also can in particular, in that provide in the dynamically change of cloth upon deployment
Maintain fabric for safety air bag and the air bag of the venting quality of regulation.
For solving the means of problem
Can solve the problem that fabric for safety air bag and the air bag of the present invention of above-mentioned problem include following
Composition.
(1) a kind of fabric for safety air bag, it is characterised in that it is by synthetic fibers multifilament yarn
The fabric for safety air bag that (multifilament yarn) is formed, the stretching in twill (bias) direction
Strength is 400～800N, the average dynamic venting quality (ADAP) measured based on ASTM D6476
For below 500mm/s, and the dynamic aeration measured based on this regulation is write music linear index (Exponent)
It is less than 1.5.
(2) according to fabric for safety air bag described in (1), it is characterised in that twill strength inclined
Difference (CV%) is less than 15%.
(3) according to the fabric for safety air bag described in (1) or (2), it is characterised in that described
The filament denier of synthetic fibers multifilament yarn is 1～4dtex, warp thread to knit density close divided by knitting of weft yarn
The scope that value is 0.95～1.05 of degree gained.
(4) according to the fabric for safety air bag according to any one of (1)～(3), wherein, institute
The solvent extraction composition stating safe air bag fabric is below 0.5 weight %.
(5) according to the fabric for safety air bag according to any one of (1)～(4), it uses boiling
Water shrinkage factor is that the synthetic fibers multifilament yarn of less than 7% is as raw yarn.
(6) manufacture method of a kind of fabric for safety air bag, it is characterised in that knit utilizing water spray
The moisture rate of the woven fabric made afterwards and before drying process is adjusted to 4～30%, carries out afterwards at 80 DEG C
Drying process above and at a temperature of less than 170 DEG C.
(7) according to the manufacture method of the fabric for safety air bag described in (6), wherein, described dry
The process time of operation is more than 10 seconds and less than 180 seconds.
(8) according to the manufacture method of the fabric for safety air bag described in (5) or (6), its feature
It is, unreal applying heat setting when described drying process or after drying process.
(9) a kind of air bag, it uses the substitute according to any one of (1)～(4)
Capsule fabric.
Invention effect
According to the present invention it is possible to obtain dynamic low ventilation excellent and intrinsic pressure retention performance is the most excellent
Different fabric for safety air bag.
Accompanying drawing explanation
Fig. 1 is the figure of the waling representing fabric.
Detailed description of the invention
The fabric for safety air bag of the present invention is formed by synthetic fibers multifilament yarn.As constituting synthetic fibers
The synthetic fibers of multifilament yarn, preferably use polyamide-based by nylon 6, nylon66 fiber, Stanyl (DSM). etc.
The long fibre that fiber or the polyester fiber based on polyethylene terephthalate are formed is multiple
Gauze.Wherein, preferably use nylon system or the yarn of Polyester, and then from thermal capacity, flexibility
From the viewpoint of and the polyamide-based long fibre that particularly preferably formed by nylon66 fiber or Stanyl (DSM).
Multifilament yarn.Polyamide-based fiber, polyester fiber, aromatic polyamide series fiber, people can be used
Make a series fiber, polysulfones series fiber, ultra-high molecular weight polyethylene series fiber etc..Wherein, preferably in batches
Polyamide-based fiber that productivity or economy are excellent or polyester fiber.
For this synthetic fibers multifilament yarn, be necessary to ensure that the strength characteristics required by air bag,
Especially excellent hot strength and the aspect of tearing strength, the synthetic fibers preferably making composition fabric are multiple
The total fiber number of gauze is 200～500dtex.
When the total fiber number of yarn is less than 200dtex, it is difficult to obtain sufficient hot strength and tear is strong
Degree, thus the most preferred.It addition, the fiber number more than 500dtex can lack as fabric for safety air bag
Flexibility, not only can make the storage to manipulation etc. be deteriorated, and when air-bag deployment to passenger
Impact become big probability and also can uprise, therefore the most preferred.
As constituting the filament denier of synthetic fibers multifilament of fabric for safety air bag, preferably 1～
4dtex.That is, if being constituted synthetic fibers multifilament yarn by many long filaments, then the filling effect of fiber is more
Improve further, be possible not only to obtain low breathing characteristics, and when compressed gas touches this fabric,
Ultimate fibre long filament in multifilament yarn the most easily moves, and multifilament yarn flattened extends in fabric side, not only
Can fill to occur the fine voids of ventilation in multifilament yarn, and fabric can be effectively sealed against
The space in portion of knotting.As long as the scope that single thread fiber number is 1～4dtex, 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 draws
Playing single thread fracture, the machine stop times of loom increases and makes productivity ratio be deteriorated, or the quality as fabric
It is deteriorated.On the other hand, if single thread fiber number becomes greatly and more than 4dtex, then touches recurrence of disease at the same time next year in compressed gas
Gauze is difficult to flattened extend in fabric side, and venting quality uprises, therefore the most preferred.
It addition, the boiling water shrinkage of the raw yarn before Zhi Zao is preferably less than 7%.At highdensity fabric
In it can be observed that adjacent yarn interval each other is already close to the closeest filling, in refining procedure etc.
Produce when shrinking, yarn not only moves in the direction, face of fabric, i.e. with and the interval of adjacent yarn become
Little mode moves, and yarn also moves in the direction not suppressing yarn to move, i.e. thickness direction.
If boiling water shrinkage is more than 7%, then yarn movement in a thickness direction is big, therefore curling (crimp)
Rate becomes excessive, and the part overlapping at warp thread and weft yarn through-thickness easily produces gap.Thus recognize
For: when compressed gas is touched, even if multifilament yarn flattened extends in fabric side, multifilament also cannot be made
Fine voids or the space in the portion of knotting of fabric in yarn narrow effectively.Power that compressed gas is touched,
I.e. pressure is the biggest, and this tendency is the most notable, and dynamic aeration the most described later writes music linear index change greatly.Preferably
It is less than 6.5%, more preferably less than 6%.Lower limit is without setting especially, if but considering in reality
The raw yarn of middle use high intensity, then lower limit is more than 3%, is preferably more than 4%, is more preferably 4.5%
Above.
About the present invention safe air bag fabric knit density, preferably make warp thread knits density divided by weft yarn
The scope that the value knitting density is 0.95～1.05.This be due to: if knitting density to take this scope, then
Can obtain having isotropic fabric, when compressed gas is touched, fabric is waiting direction to extend,
The multifilament yarn that fabric side flattened extends can more effectively fill the space in the portion of knotting of fabric.At this
In the case of value is less than 0.95, become non-isotropy fabric, be not only difficult to fill knotting of fabric
The space in portion, and make production efficiency the poorest owing to needs improve weft count, thus the most preferred.Separately
Outward, in the case of this value is more than 1.05, also becomes non-isotropy fabric, be not only difficult to fill
The space in the portion of knotting of fabric, and cause warp thread each other when weaving opening because warp count is high
Phase mutual friction, produces lint, makes quality reduce, therefore the most preferred.
It addition, the coverage coefficient of the fabric tried to achieve by following formula (CF) is preferably 1900～2300.Cover
Lid coefficient refers to that the density with warp thread and the total fiber number of weft yarn and each of which is to represent web state
Under the index of aeration of fiber, it may be said that representing and knit density, this value is the biggest, represents between yarn
Gap is the least, air-tightness is the highest.But, the flexibility as fabric reduces, and weight becomes weight simultaneously.
That is, diminish along with coverage coefficient, make fabric become soft, weight simultaneously, but air-tightness is more
Send out and reduce.Therefore, in order to both guarantee that the flexibility of appropriateness also ensures that sufficient air-tightness (low aeration),
It needs to be determined that the CF value of appropriateness, it is confirmed by the present inventor etc., found that: at this
CF value is to have above-mentioned two characteristics during the scope of 1900～2300 concurrently.By making coverage coefficient be 1900
Above, low aeration can be obtained.It addition, be less than 2300 by making coverage coefficient, Ke Yiti
Height closely storage property.
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, it is not particularly limited, if considering the uniformity of fabric physical property, then plain weave
Preferably, loom is not particularly limited and knits for air-jet loom (AJL), rapier loom (RL), water spray
The spies such as machine (WJL), if considering from weaving efficiency, then preferred water-jet loom.
Additionally, the tensile strength of the waling of the fabric for safety air bag of the present invention is (following, also referred to as
Make twill strength.) be preferably 400～800N scope.Here, waling is with fabric
The half angle of warp thread and weft yarn angulation and the direction of warp yarns.In the case of webs, by
Being about 90 degree in warp thread and weft yarn angulation, therefore waling becomes the deviation of relative warp thread about
The direction of 45 degree.The tensile strength of waling represents that the multifilament yarn constituting fabric is wound around each other
Intensity, if the tensile strength of waling is this scope, then the only ultimate fibre when compressed gas is touched
Long filament is moved and multifilament yarn self will not move, and the multifilament yarn being flat to fabric effectively seals against
Fine voids in multifilament yarn, the space in the portion of knotting of fabric.Tensile strength in waling is less than
In the case of 400N, multifilament yarn mutually winding each other is weak, causes multifilament when compressed gas is touched
Yarn moves, and the space in the portion of knotting of fabric becomes big, therefore the most preferred.On the other hand, if waling
Tensile strength is more than 800N, then multifilament yarn mutually winding each other is too strong, even the shifting of single thread long filament
Moving also can be hindered, therefore the most preferred.More preferably 450～700N.
And then, for the present invention, the deviation (CV%) of the tensile strength of waling is preferably
Less than 15%, more preferably less than 10%.Deviation described herein (CV%) is for determining twill
The standard deviation of the measured value of 10, the sample of strength is multiplied by 100 times again divided by meansigma methods and calculates
Value.If CV (%) is more than 15%, then the deviation of twill strength becomes big, and its result upon deployment should
Power concentrates on the part that twill strength is low, thus the pinprick that there is generation sewing unit offsets or pinprick opens
Probability, therefore the most preferred.
It moreover has been found that: in order to the tensile strength of waling being set in the scope of regulation, fabric
Refine, be dried time condition the most important.I.e., it is believed that the tensile strength of waling represents at warp thread
With " the mobile difficulty or ease of the yarn " degree under the interaction of weft yarn, and it was found that not only by total fine
Degree, filament denier, knit the impact of density, but also by solvent extraction component amount, the yarn of longitude and latitude
The impact of the condition of the tension force during contraction of line, thus reaches the present application.
In the present application, as the cloth before being dried, need to make moisture rate be 4%～
The scope of 30%.By setting the moisture rate of this scope, make cloth when being dried by being dried place equably
Reason, therefore, it is possible to fabric entirety is dried uniformly, is shunk, thus becomes the cloth obtaining balance.
In the case of moisture rate is less than 4%, utilize the heat in drying machine that the dry of cloth is become uneven.
Especially carrying out in advance being dried of selvedge side, therefore the crimp percent of weft direction becomes big, causes twill
The reduction of strength.It is preferably more than 4.5%, more preferably more than 5%.At moisture rate more than 30%
In the case of, in order to sufficiently be dried, not only need substantial amounts of heat, and make dry becoming
Uneven, now also result in the reduction of twill strength.It is preferably less than 25%, more preferably 20%
Below.
The moisture rate of the fabric before Gan Zaoing can be by entering the fabric after WJL weaving, refining treatment
The adjustment of row moisture is reached.In the case of water deficient, it is possible to be adjusted by giving water,
In the case of water quantities is many, it is possible to adjust in the way of utilizing air stream to blow away water or absorb water
Whole.Deposit it addition, utilization adds, at resin, the dewatered method of ironer process being frequently used man-hour
Produce the problem of wrinkle, utilize the pressure of ironer that the reinforcing of the intersection point of fabric becomes uneven simultaneously
Even, make twill strength become uneven, thus the most preferred.
For the present application, the temperature of drying machine is preferably relatively low temperature.But, if too low,
Then it is dried and cannot be sufficiently carried out, the most preferably more than 80 DEG C.It is more preferably more than 100 DEG C, enters
One step is preferably more than 110 DEG C.If baking temperature is too high, then the especially selvedge side in drying machine
Produce uneven being dried, make twill strength reduce.It is preferably less than 170 DEG C, more preferably 160 DEG C
Below, more preferably less than 150 DEG C.It addition, about the time of process, as long as with dry temperature
The condition that cloth is dried by the degree × process time, then and no problem, if at high temperature carrying out longer
Time-triggered protocol, then the twill strength of cloth reduces, therefore the most preferred.It is 180 by the time in drying machine
Below second, it is more preferably less than 120 seconds, more preferably less than 90 seconds.
It is set as the scope of regulation by the moisture rate of the fabric before being dried, fabric can be made overall all
It is dried evenly.Based on this phenomenon, constitute the contraction of the yarn of fabric, be stretching in width and send out simultaneously
Raw, therefore yarn itself is configured in optimum position.Make the twill of fabric self strong it is thus found that have
The effect that power uprises, thus reach the present application.
For the cloth after weaving, the air bag of the present invention is not the most implemented generally non-coated base fabric
The heat setting often carried out.If enforcement heat setting, then constitute the yarn bar heat shrinkable of fabric, make fibre
Dimension Shu Zishen is collected, and produces the gap between Fiber-Fiber, and therefore the aspect in low aeration is the most excellent
Choosing.Further, since the setting of unreal applying heat, therefore can simplify manufacturing process, thus also have and make system
The advantage causing this step-down.Even if refining procedure can also be carried out after weaving, but refining procedure is excellent
Gated in the tepidarium of 20～100 DEG C.
The solvent extraction composition of the fabric for safety air bag of the present invention is preferably below 0.5 weight %.If
More than 0.5 weight %, then this lubrication is utilized to make above-mentioned twill strength diminish, thus the most preferred.
It is preferably below below 0.3 weight %, more preferably 0.1 weight %.
The average dynamic venting quality that the fabric for safety air bag of the present invention measures based on ASTM D6476
(ADAP) it is preferably below 500mm/s.More preferably below 400mm/s, further preferably
For below 300mm/s.If in the range of being set as this, then launch at airbag cushion and stop and take advantage of
Can do one's utmost during visitor to suppress gas to reveal from fabric, it is possible to keep the intrinsic pressure of air bag.About this mensuration,
Abrupt release is filled in the compressed air of test head and touches the sample of fabric, measures and gradually becomes
Venting quality (dynamic aeration degree) corresponding to pressure changed, calculates the pressure upper limit after reaching maximum pressure
Dynamic aeration in the range of between (UPPER LIMIT)～threshold pression (LOWER LIMIT)
The average ventilation of degree.About measuring the method for leakage of the air after maximum pressure is reached, represent from
To retraining passenger and completing to retrain the inflation pressure retention passenger after air-bag deployment, exist with measuring
The static venting quality of the venting quality under certain point pressure is entirely different.Average dynamic about the present invention is led to
The condition determination of manner (ADAP), adjusts according to the mode making maximum pressure reach 100 ± 5kPa
Compressed-air actuated pressure, and be set to calculate average dynamic venting quality threshold pression be 30kPa and on
Limits pressure is the intrinsic pressure scope of the air bag during passenger restraint of the reality of 70kPa.
It addition, the dynamic aeration that the fabric for safety air bag of the present invention measures based on ASTM D6476
Linear index (Exponent) of writing music is less than 1.5 the most important, preferably less than 1.4, more preferably
It is less than 1.3.Dynamic aeration write music linear index (Exponent) be from utilize above-mentioned average dynamic lead to
Pressure-dynamic aeration that the mensuration of manner obtains is write music the exponent E of line gained, it is possible to use
The air bag Special ventilating testing machine FX3350 of TEXTEST company calculates.The present inventor
Write music linear index and substitute when stoping passenger after airbag cushion launches Deng to dynamic aeration
The relation of intracapsular pressure retentivity conducts in-depth research, found that dynamic aeration is write music, linear index is
1.5 is the most important below for air bag inflation pressure retention.
Linear index of writing music dynamic aeration below is described in detail.If dynamic aeration is write music, linear index is
1.0, how the most no matter air bag is intrinsic pressure changes, and all shows certain venting quality.If dynamic aeration
Linear index of writing music is more than 1.0, then along with the increase that air bag is intrinsic pressure, demonstrate that venting quality rises.
If dynamic aeration is write music, linear index is less than 1.0, then along with the increase that air bag is intrinsic pressure, demonstrate logical
Manner reduces.Generally, average dynamic venting quality is the least, and dynamic aeration linear index of writing music is the biggest.That is,
Can be by the stream of air if having, then this stream expands along with the intrinsic pressure increase of air bag,
Mean that venting quality rises.If the air bag that the expansion of air bag makes expansion touches passenger, then pacify
The pressure of full inside air bag increases, and pressure increase causes the increase of venting quality, therefore with dynamic aeration degree
The fabric that exponent is low is compared, and dynamic aeration is write music the inflator gas of the high fabric of linear index
The loss of (inflator gas) becomes big.
The fabric for safety air bag of the present invention is characterized as: although average dynamic venting quality is little, but dynamically
Venting quality exponent is little.If dynamic aeration is write music, linear index is more than 1.5, then passenger touches substitute
Capsule and when making pressure within air bag increase, there is the increase of venting quality, the damage of inflator gas
Consumption becomes excessive, therefore the most preferred.
It addition, the tensile strength of the fabric for safety air bag of the present invention is equal at warp thread direction, weft direction
It is above ideal for 500N/cm.It is preferably more than 550N/cm, more preferably 600N/cm
Above.When air bag works air bag because of fabric intensity in the case of breakage, stress collection
In there is the tendency of breakage in intensity lowermost portion.In other words, as long as the minimum intensity of fabric meets
Required intensity, then be prevented from breakage.
By using the fabric of the present application, it is possible to improve expanding performance when making air bag.
That is, for dynamic aeration degree during air-bag deployment, do not hinder the movement of yarn (single thread) and answer
Silk configures with flat each other, it is possible to effectively seals against fabric and knots the space in portion.Exhibition described herein
The improvement opening performance refers to: the raising of fabric burst pressure during expansion, the shortening of duration of run,
Even if also being able to when using the inflator of high pressure use the peace of the raw yarn with the most equal strength
Full air bag carries out tackling and not tackles employing the air bag of high-tenacity raw yarn.
Embodiment
Hereinafter, enumerate embodiment and the present invention is further illustrated, but the present invention is not subject to
The restriction of following embodiment, naturally it is also possible to meet changed in the range of context purport after real
Executing, they are all contained in the technical scope of the present invention.It addition, use in the following embodiments is each
The test method(s) planting performance is as described below.JIS uses 1999 annual versions.
Raw yarn boiling water shrinkage: by raw yarn with Guang (Japanese original text: カ セ) shape sample, 20 DEG C,
The humiture of 65%RH adjusts indoor adjustment more than 24 hours, applies to be equivalent to sample
The load of 0.045cN/dtex, measured length L0.Then, this sample is being boiled with tension-free state
Rise after water impregnates 30 minutes, adjust room-dry 4 hours in above-mentioned humiture, again to sample
Apply to be equivalent to the load of 0.045cN/dtex, measured length L1.According to the following formula by respective length
L0 and L1 obtains boiled water shrinkage factor.
Boiled water shrinkage factor=[(L0-L1)/L0] × 100 (%)
The total fiber number of composition yarn:: measure according to JIS L1096 annex 14-A method.
Constitute the long filament number of yarn: utilize stereoscopic microscope amplify the section of yarn and it is carried out
Shooting, counts long filament number from this cross sectional photograph.
Single thread fiber number: use and remove value obtained by long filament number from total fiber number.
Knit density: be determined based on JIS L 1096:1999 8.6.1.Sample is placed on
On smooth platform, remove factitious wrinkle, tension force, to different 5 position counting 1 inch
(2.54cm) interval warp thread and the radical of weft yarn, calculate respective meansigma methods.
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 JIS L 1096:1999 8.12.1A method (cloth strength and elongation
Test method), warp thread direction and weft direction are determined test respectively.Take test film each 5
Sheet, from the both sides of split remove yarn, split is 50mm, utilize constant speed traction strength tester with
Test film is stretched by grip separation 200mm, draw speed 200mm/min until it ruptures,
Measure the maximum load till fracture, and to longitudinally and laterally calculating meansigma methods respectively.
(8) twill strength: twill will be set to the angle of 45 degree with the straight line of the warp yarns of fabric
Direction, along waling cutting wide 30mm, long 150mm.Constant speed is utilized to draw strength test
Instrument with grip separation 50mm, draw speed 50mm/min to sample determination maximum load.It addition,
From full width (the weft direction) × warp thread direction 1m of cloth, carry out 10 samplings at random, calculate it and put down
Average and deviation (CV%).It addition, CV% passes through the standard deviation of 10 measured values divided by flat
Average is multiplied by 100 times again and calculates.
(9) average dynamic venting quality dynamic aeration is write music linear index: come based on ASTM D6476
Measure.Use the air bag Special ventilating testing machine FX3350 of TEXTEST company, test
Pressure head uses 200cm3.It addition, be filled in the compressed-air actuated pressure (START of test head
PRESS URE) adjust according to the mode making the maximum pressure putting on fabric reach 100 ± 5kPa
Whole.
Release is filled in the compressed air of test head so that it is touch with the sample of fabric, time dependent ground
Measure pressure and venting quality, obtain gained pressure-dynamic aeration and write music after maximum pressure in line arrives
Pressure upper limit (UPPER LIMIT:70kPa)～threshold pression (LOWER LIMIT:30kPa)
In the range of the meansigma methods of dynamic aeration degree as average dynamic venting quality (ADAP).It addition,
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 that will put into drying machine is cut, uses this cloth to carry out according to JIS L 1,096 8.9
Measure.It addition, 3 points (central part 1 point, the selvedge end 2 of the diverse location to split direction
Point) it is determined.
(11) the solvent extraction composition of fabric:
It is determined according to JIS L 1,096 8.36.It addition, as extractant, employ just own
Alkane.
(12) air-bag deployment test:
Air bag sews: sewing No. 99/28164 substitute described in pamphlet of International Publication
Capsule.But, periphery sewing uses suture to be 1470dtex, 2 row that number is 5.0 pins/cm of handling the needle are double
Line eyelet.It is not provided with air vent.The air bag of gained is little according to International Publication the 01/9416th
Method described in book folds so that it is after maintaining the state that the rubber ring being commercially available draws in, peace
Install to deployment opening.
Test as the expansion utilizing inflator, employ the air bag examination with nitrogen filling capacity
Experiment device (her rattan essence mechanism).It addition, when using the air bag of 60L, at maximum pressure
Launch under conditions of being between 60～70kPa, the sewing unit to the air bag after launching
State is confirmed.
◎: the pinprick of sewing part offsets within 1mm.
Zero: exist in sewing part and produce the part that pinprick is 1mm～3mm.
△: there is pinprick in sewing part and open the part for 3mm～5mm.
×: the most do not keep the shape of air bag, or there is generation pinprick in sewing part
The skew part more than 5mm.
(embodiment 1): by the multifilament yarn of the 475dtex/140 root that formed by nylon66 fiber, (boiling water is received
Shrinkage 5.7%) to be used as warp thread and weft yarn without twisted state, utilize water-jet loom (WJL) to knit
Make flat fabric, carry out refine, be dried, produce 53.4 pieces/inch of warp thread, 52.8/English of weft yarn
Very little, the fabric of coverage coefficient (CF) 2196.It addition, the fabric before being dried is blowed and sprayed pressure-air
And remove water, being adjusted to moisture rate is 7%.The physical property of the fabric of gained is shown in table 1.By
Table 1 is clear that: the dynamic low aeration of this fabric and inflation pressure retention are excellent, are the most excellent
Fabric for safety air bag.
(embodiment 2): by the multifilament yarn of the 353dtex/192 root that formed by nylon66 fiber, (boiling water is received
Shrinkage 6.2%) to be used as warp thread and weft yarn without twisted state, utilize WJL to weave flat fabric, enter
Row refine, be dried, produce 63.0 pieces/inch of warp thread, weft yarn 60.5 pieces/inch, coverage coefficient
(CF) fabric of 2201.It addition, the fabric before being dried uses vacuum equipment attract to remove moisture,
Being adjusted to moisture rate is 15%.The physical property of the fabric of gained is shown in table 1.Clearly may be used by table 1
Know: the dynamic low aeration of this fabric and inflation pressure retention are excellent, be that the most excellent air bag is used
Fabric.
(embodiment 3): by the multifilament yarn of the 470dtex/144 root that formed by nylon66 fiber, (boiling water is received
Shrinkage 5.2%) to be used as warp thread and weft yarn without twisted state, utilize WJL to weave flat fabric, enter
Row refine, be dried, produce 49.0 pieces/inch of warp thread, weft yarn 49.0 pieces/inch, coverage coefficient
(CF) fabric of 2016.It addition, the fabric before being dried uses vacuum equipment attract to remove moisture,
Being adjusted to moisture rate is 8%.The physical property of the fabric of gained is shown in table 1.Clearly may be used by table 1
Know: the dynamic low aeration of this fabric and inflation pressure retention are excellent, be that the most excellent air bag is used
Fabric.
(embodiment 4): by the multifilament yarn of the 225dtex/108 root that formed by nylon66 fiber, (boiling water is received
Shrinkage 6.5%) to be used as warp thread and weft yarn without twisted state, utilize WJL to weave flat fabric, enter
Row refine, be dried, produce 73.4 pieces/inch of warp thread, weft yarn 73.8 pieces/inch, coverage coefficient
(CF) fabric of 2095.It addition, the fabric before being dried uses vacuum equipment attract to remove moisture,
Being adjusted to moisture rate is 4.7%.The physical property of the fabric of gained is shown in table 1.Clear and definite by table 1
Understand: the dynamic low aeration of this fabric and inflation pressure retention are excellent, are the most excellent air bags
Use fabric.
(comparative example 1): by the multifilament yarn of the 481dtex/144 root that formed by nylon66 fiber, (boiling water is received
Shrinkage 9.5%) to be used as warp thread and weft yarn without twisted state, utilize WJL to weave flat fabric, enter
Row refine, be dried, produce 53.2 pieces/inch of warp thread, weft yarn 52.9 pieces/inch, coverage coefficient
(CF) fabric of 2208.The physical property of the fabric of gained is shown in table 1.It is clear that by table 1:
For this fabric, it is up to 33% owing to the boiling water shrinkage of raw yarn is high, be dried front moisture rate,
Therefore the heat applied fabric when dry becomes uneven, and the contraction of result fabric also becomes uneven
It is even, so that deviation becomes big.Result: although the meansigma methods of twill strength is high, but deviation becomes excessive,
Therefore in launching test, stress concentrates on the part that twill strength is low, produces the seam of maximum 3.6mm
The pinprick skew in portion processed.
(comparative example 2): by the multifilament yarn of the 472dtex/72 root that formed by nylon66 fiber, (boiling water is received
Shrinkage 9.8%) to be used as warp thread and weft yarn without twisted state, utilize WJL to weave flat fabric, enter
Row refine, be dried, produce 55.5 pieces/inch of warp thread, weft yarn 54.5 pieces/inch, coverage coefficient
(CF) fabric of 2267.The physical property of the fabric of gained is shown in table 1.It is clear that by table 1:
Make the venting quality of fabric uprise greatly owing to constituting the single thread fiber number of the multifilament yarn of this fabric, and produce
Higher shrinkage factor, because being dried time the reduction of the strength of the twill caused by temperature height and twill strength
The increase of deviation, in launching test, produces the pinprick skew of the sewing unit of maximum 4.8mm.
(comparative example 3): by the multifilament yarn of the 353dtex/192 root that formed by nylon66 fiber, (boiling water is received
Shrinkage 6.2%) to be used as warp thread and weft yarn without twisted state, utilize WJL to weave flat fabric, enter
Row refine, be dried, produce 55.0 pieces/inch of warp thread, weft yarn 63.0 pieces/inch, coverage coefficient
(CF) fabric of 2103.The physical property of the fabric of gained is shown in table 1.It is clear that by table 1:
For this fabric, owing to weft count is much larger than warp count, therefore it is short of isotropism, thus
It is difficult to fill the space in the portion of knotting of fabric and twill strength also reduces, thus produce in sewing unit
Bigger pinprick skew.
(comparative example 4): by the multifilament yarn of the 225dtex/108 root that formed by nylon66 fiber, (boiling water is received
Shrinkage 6.5%) to be used as warp thread and weft yarn without twisted state, utilize WJL to weave flat fabric, right
Fabric before Gan Zaoing blows and sprays pressure-air to remove water, and being adjusted to moisture rate is 8%.As dry
Dry condition, the latitude width of the cloth before relatively dry is widened the state of 0.5% and is fixed so that it is pass through
In the stove of 180 DEG C × 120s, carry out so-called heat setting.The density of knitting of gained fabric is warp thread 71.8
Piece/inch, weft yarn 73.5 pieces/inch, coverage coefficient (CF) is 2068.By the fabric of gained
Physical property is shown in table 1.Being processed by this heat setting, make twill strength too high, result makes venting quality performance
It is deteriorated.This be due to: by heat setting, thus become the bar that warp thread, weft yarn are excessively given tension force
Part.Owing to the intersection point of longitude and latitude is compressed, thus twill strength uprises, but, warp thread, weft yarn are certainly
Body will not make single thread long filament broaden because of tension force, it is impossible to the space between landfill yarn-yarn, thus leads
Cause venting quality is deteriorated, and 2 positions of the sewing part of air bag after deployment produce more than 5mm
Pinprick skew.
(comparative example 5): by the multifilament yarn of the 475dtex/140 root that formed by nylon66 fiber, (boiling water is received
Shrinkage 5.7%) to be used as warp thread and weft yarn without twisted state, utilize AJL to weave flat fabric.?
Safety air sac cloth is obtained on the premise of not carrying out refine, dry, heat setting etc..Knitting density is warp thread
52.1 pieces/inch, weft yarn 51.9 pieces/inch, coverage coefficient (CF) is 2150.Knitting gained
The physical property of thing is shown in table 1.For this cloth, raw yarn oil preparation residue 0.63%, thus cause between longitude and latitude
Intersection point easily slide, twill strength reduce.Therefore, result is: average dynamic venting quality (ADAP)
Value high, dynamic aeration writes music linear index (Exponent) more than 1.5.Further, since twill is strong
Power reduces, and thus causes the sewing unit of the air bag after launching to produce significantly pinprick skew.
[table 1]
Industrial applicability
The present invention is determined by constituting the total fiber number of multifilament yarn of fabric, single thread fiber number and the boiling of raw yarn
Water shrinkage factor, and further determine that fabric knit density and twill strength, such that it is able to obtain dynamically
The fabric for safety air bag that low ventilation excellent and intrinsic pressure retention performance are also excellent.
Symbol description
1 fabric for safety air bag
2 fabrics
3 warp thread
4 weft yarns
5 lines representing warp thread direction
6 lines representing weft direction
7 lines representing waling
Claims (9)
1. a fabric for safety air bag, it is characterised in that it is formed by synthetic fibers multifilament yarn
Fabric for safety air bag, the tensile strength of waling is 400～800N, based on ASTM D6476
The average dynamic venting quality (ADAP) measured is below 500mm/s, and measures based on this regulation
Dynamic aeration linear index (Exponent) of writing music be less than 1.5.
Fabric for safety air bag the most according to claim 1, it is characterised in that twill strength
Deviation (CV%) is less than 15%.
Fabric for safety air bag the most according to claim 1 and 2, it is characterised in that described conjunction
The filament denier becoming fiber multifilament yarn is 1～4dtex, and the density of knitting of warp thread knits density divided by weft yarn
The value of gained is the scope of 0.95～1.05.
4. according to the fabric for safety air bag according to any one of claims 1 to 3, wherein, described
The solvent extraction composition of safe air bag fabric is below 0.5 weight %.
5., according to the fabric for safety air bag according to any one of Claims 1 to 4, it uses boiling water
Shrinkage factor is that the synthetic fibers multifilament yarn of less than 7% is as raw yarn.
6. the manufacture method of a fabric for safety air bag, it is characterised in that knit utilizing water-jet loom
The moisture rate of the fabric after making and before drying process is adjusted to 4～30%, carries out afterwards more than 80 DEG C
And the drying process at a temperature of less than 170 DEG C.
The manufacture method of fabric for safety air bag the most according to claim 6, wherein, described dry
The process time of drying process is more than 10 seconds and less than 180 seconds.
8., according to the manufacture method of the fabric for safety air bag described in claim 6 or 7, its feature exists
In, unreal applying heat setting when described drying process or after drying process.
9. an air bag, it uses the air bag according to any one of Claims 1 to 4 and uses
Fabric.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010124483.1A CN111155219B (en) | 2015-06-29 | 2015-06-29 | Fabric for airbag, method for producing same, and airbag |
| CN201510368890.6A CN106319720B (en) | 2015-06-29 | 2015-06-29 | Fabric for airbag, method for producing same, and airbag |
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| CN201510368890.6A CN106319720B (en) | 2015-06-29 | 2015-06-29 | Fabric for airbag, method for producing same, and airbag |
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| CN106319720B CN106319720B (en) | 2021-02-09 |
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| CN202010124483.1A Active CN111155219B (en) | 2015-06-29 | 2015-06-29 | Fabric for airbag, method for producing same, and airbag |
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Cited By (2)
| 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 |
| CN111295313A (en) * | 2017-11-01 | 2020-06-16 | 世联株式会社 | Base fabric for airbag, and airbag |
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| JPH09291465A (en) * | 1996-04-19 | 1997-11-11 | Toyobo Co Ltd | Production of fabric for air bag |
| JP2004190158A (en) * | 2002-12-10 | 2004-07-08 | Toray Ind Inc | Air bag base fabric and air bag |
| JP2009256860A (en) * | 2008-03-21 | 2009-11-05 | Toray Ind Inc | Woven fabric for air bag and method for producing woven fabric for air bag |
| CN103993404A (en) * | 2013-02-19 | 2014-08-20 | 东洋纺株式会社 | High-density fabric for safety air bag |
| CN104294443A (en) * | 2014-10-16 | 2015-01-21 | 可隆（南京）特种纺织品有限公司 | Airbag fabric and production method thereof |
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| JP3733869B2 (en) * | 2001-04-19 | 2006-01-11 | 東洋紡績株式会社 | High density fabric for airbags |
| JP3727310B2 (en) * | 2001-02-01 | 2005-12-14 | 旭化成せんい株式会社 | Silicone coated fabric and airbag |
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| JPH09291465A (en) * | 1996-04-19 | 1997-11-11 | Toyobo Co Ltd | Production of fabric for air bag |
| JP2004190158A (en) * | 2002-12-10 | 2004-07-08 | Toray Ind Inc | Air bag base fabric and air bag |
| JP2009256860A (en) * | 2008-03-21 | 2009-11-05 | Toray Ind Inc | Woven fabric for air bag and method for producing woven fabric for air bag |
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| 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 |
| CN111295313A (en) * | 2017-11-01 | 2020-06-16 | 世联株式会社 | Base fabric for airbag, and airbag |
| US11738709B2 (en) | 2017-11-01 | 2023-08-29 | Siren Co., Ltd. | Air bag base cloth and air bag |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106319720B (en) | 2021-02-09 |
| CN111155219B (en) | 2021-06-15 |
| CN111155219A (en) | 2020-05-15 |
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