CN103993404A - High-density fabric for safety air bag - Google Patents
High-density fabric for safety air bag Download PDFInfo
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- CN103993404A CN103993404A CN201310099822.5A CN201310099822A CN103993404A CN 103993404 A CN103993404 A CN 103993404A CN 201310099822 A CN201310099822 A CN 201310099822A CN 103993404 A CN103993404 A CN 103993404A
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Abstract
The utility model relates to uncoated base cloth for a safety air bag, which has the advantages that the ventilation degree is low, in addition, the softness is realized, the collection performance is also good, in addition, the used raw yarn quantity is less, the weight is light, and the economy is also good. A high-density fabric for a safety air bag is characterized in that the total fineness D (dtex*9/10) of warp yarns and weft yarns of the high-density fabric and the width W(mm) of the warp yarns and weft yarns under the fabric condition meet the following relational expression that the D/W of the warp yarns is within 700, the D/W of the weft yarns is within 850, and in addition, the cover factor (CF) is in the range being 2000 to 2400.
Description
Technical field
The present invention relates to one without coating air bag base cloth, its venting quality is low and soft, storage property is also good, and use precursor amount is less, lightweight, economy is also good.
Background technology
In recent years, air bag starts extensively universal as the safety device of protecting passenger when the vehicle collision.In the past, used material at fabric face neoprene-coating and silicone rubber etc. as air bag base cloth always.But these have used the air bag of face coat fabric, its coating processing has brought many costs to increase, and has the shortcoming that weight increases the weight of.
Therefore, starting employing does not carry out resin-coated without coated base fabric at fabric face.But, well-knownly compare with face coat base cloth with base cloth without coating air bag, there is the shortcoming that venting quality is high.Therefore, use in base cloth at the air bag that does not carry out face coat processing, thereby need to by improve the weaving density of fabric dwindle silk with thread between gap prevent the leakage of air, but there is thus following problem, that is: flexibility variation, in the time of airbag deployment, likely face etc. is caused to damage, and because the folding storage property that also causes is poor, further cause weight to increase the weight of and cost increase because the precursor use amount of unit are increases.
[patent documentation 1] Japanese documentation JP 2008-81873
Invent technical problem to be solved
The present invention is conceived to above-mentioned situation and completes, and it is a kind of without coating air bag base cloth that its object is to provide, and its gas permeability is low especially and soft, lightweight, and cheap, economy is also good.
Summary of the invention
The air bag base cloth of the present invention that can address the above problem, has following formation.
(1) an air bag high-density fabric, the venting quality under 50kPa pressure reduction is 3.3L/cm
2below/min, and the venting quality index (50kPa) of trying to achieve according to formula 1 is more than 1.2,
Venting quality index (50kPa)
=(Log (Q (55kPa))-Log (Q (45kPa)))/(Log55-Log45) ... (formula 1)
Q (55kPa): the venting quality (1/cm under 55kPa pressure reduction
2/ min)
Q (45kPa): the venting quality (1/cm under 45kPa pressure reduction
2/ min).
(2) the air bag high-density fabric according to (1), from the warp thread of high-density fabric unwinding or weft yarn the interlacing number of degrees of at least one be 8/below m.
(3) according to the air bag high-density fabric (1) or (2) described, be 160～580dtex from the warp thread of high-density fabric unwinding or the total fineness of weft yarn, the monofilament fineness that total fineness draws divided by the monofilament number that forms total fineness is 1～4dtex, the total fineness D (dtex × 9/10) of the warp thread of high-density fabric and weft yarn meets following relational expression with this warp thread and the width W (mm) of weft yarn under fabric state
The D/W=700 of warp thread is following, below the D/W=850 of weft yarn,
And coverage coefficient (CF) is in 2000～2400 scopes.
(4) according to the air bag high-density fabric (1) or (2) described, be more than 4% from the warp thread of fabric unwinding and the curling rate variance of weft yarn.
(5) according to the air bag high-density fabric (2) described, the interlacing degree of weaving front precursor is 10～30/m.
Invention effect
Of the present invention have above-mentioned characteristic without coating air bag with base cloth.Owing to thering is above-mentioned characteristic, it is at the air-bag deployment initial stage, before passenger contacts with air bag, can be launching air bag for maintaining in the duration of run faster that low venting quality requires, after passenger contacts with air bag, because the air leakage from air bag is larger, can alleviate the impact to passenger.
Brief description of the drawings
Fig. 1 is the part amplification view that forms the fabric of air bag base cloth.
Symbol description
CF coverage coefficient
D total fineness
T takes multiplying power
SEM scanning electronic microscope
W width
The widest part width of W1
Detailed description of the invention
As the fiber that used in the present invention, no matter be that natural fabric or synthetic fiber all can use, but the economy of considering and for meeting above-mentioned characteristic, use synthetic fiber comparatively desirable, wherein can preferentially use the long fiber multifilament being formed by the polyamide fibers such as nylon 6, nylon 66, nylon 46 and the polyester fiber taking polyethylene terephthalate as core.Among these, also can preferentially use nylon yarn and polyester fiber class yarn, further to consider from thermal capacity and flexibility viewpoint, the polyamide long fiber multifilament being made up of nylon 66 and nylon 46 is desirable especially.
Venting quality under 50kPa pressure reduction of the present invention is 3.3L/cm
2below/min, comparatively it is desirable to 2.3L/cm
2below/min, more preferably 2L/cm
2below/min, particularly desirably 1.5L/cm
2below/min.Well-known 50kPa approaches the value of surge pressure while being air-bag deployment.Now, if exceed 3.3L/cm
2/ min, venting quality is too high, and therefore the duration of run of air bag is longer, considers unsatisfactory from protection passenger's viewpoint.Consider from the viewpoint of duration of run, lower more satisfactory of venting quality, but reduce terrifically the physical property restriction that can be subject to air bag cloth without the venting quality of coating air bag, therefore in the time of 50kPa venting quality at 1.0L/cm
2/ min is good above.
Venting quality index under 50kPa pressure reduction of the present invention is preferably more than 1.2, is more preferred from more than 1.3, and better is more than 1.5, and good is especially more than 1.8.Desirable air bag, within the limits prescribed, and venting quality index is more than 1.2 to the venting quality in the time of 50kPa, the impact can alleviate passenger and airbag crash like this time is therefore comparatively desirable.At venting quality index lower than 1.2 air bag, if the venting quality during by its 50kPa is set as scope of the present invention, the impact cannot alleviate passenger and airbag crash time and bring impact to passenger, therefore unsatisfactory.Venting quality index lower than 1.2 air bag in, for making it not bring impact need to improve the venting quality of cloth to passenger, if but the venting quality of cloth is too high, development rate is slack-off, the passenger that can not adequately protect is therefore unsatisfactory.In addition, venting quality index calculates according to following formula 1.
Venting quality index (50kPa)
=(Log (Q (55kPa))-Log (Q (45kPa)))/(Log55-Log45) ... (formula 1)
Q (55kPa): the venting quality (1/cm under 55kPa pressure reduction
2/ min)
Q (45kPa): the venting quality (1/cm under 45kPa pressure reduction
2/ min)
The interlacing degree of weaving front precursor is preferably 10～30/m.If the interlacing degree of precursor is lower than 10/m, yarn tighten up insufficiently, therefore in the time weaving, contact with close yarn, or with intersection point through weft yarn on because the interference that yarn occurs easily causes single wire fracture, unsatisfactory.Consider from this point, interlacing degree, compared with Gao Weijia, still need to obtain the processing of high interlacing degree in the precursor fabrication stage in order to obtain too high interlacing degree, and such processing can damage precursor.Its result, causes single wire fracture and strength decreased in the precursor stage, therefore unsatisfactory.The interlacing degree of the precursor before weaving is 10～30/m, is preferably 13～27/m, is more preferred from 15～25/m.
From as air bag cloth use the warp thread of high-density fabric unwinding or the interlacing number of degrees of weft yarn be preferably 8/below m.By being set as this interlacing degree, the monofilament that makes to form precursor fully launch and in fabric landfill gap, thereby can make it keep low ventilation and make venting quality index under authorized pressure in scope preferably.The interlacing number of degrees of the yarn of comparatively desirable unwinding be 7/below m, more preferably 6/below m.The lower limit of the interlacing number of degrees is not particularly limited, but be preferably 1/more than m, be more preferred from 3/more than m.In addition, these interlacing degree, as long as at least any one party of warp thread or weft yarn has.Comparatively it is desirable to, through the interlacing degree of weft yarn 8/below m.
Because needs are guaranteed the desired strength characteristics of air bag, especially good TENSILE STRENGTH and tearing strength, to be therefore preferably the total fineness of its precursor be that 160～580dtex and monofilament fineness are 1～4dtex to this multifilament.
The total fineness of yarn, lower than 160dtex, is difficult to obtain sufficient TENSILE STRENGTH and tearing strength, therefore unsatisfactory.In addition, be greater than the fineness of 580dtex, lack as the flexibility of base cloth, not only poor to the storage of steering wheel etc., and may become greatly passenger's impact in the time of airbag deployment, therefore unsatisfactory.
In addition, if monofilament fineness lower than 1dtex, strength of filament deficiency, in the time weaving, especially warp thread easily produces single wire fracture, the stopping time of loom increases, make production efficiency decline or make fabric quality decline.On the other hand, if monofilament fineness exceedes 4dtex, chap cannot be guaranteed sufficient low venting quality, therefore unsatisfactory.Consider above-mentioned strength characteristics and flexibility, production efficiency, weight, cost etc., the total fineness of desirable especially precursor is 200～480dtex, and better is 220～420dtex, is more desirably 230～380dtex.Monofilament fineness is as long as within the scope of 1～4dtex, and still better is 2～3.5dtex, is more desirably 2.5～3.3dtex.
In addition, used in the present invention weave before multifilament, except the total fineness and monofilament fineness of above-mentioned precursor, precursor intensity need to be more than 8.0cN/dtex.Such strength characteristics is the ensure safety TENSILE STRENGTH of base cloth for air bag and the necessary condition of tearing strength.In the time using air bag, by quick importing compressed air, this air bag is expanded and play the effect of shock absorbing, compressed-air actuated importing produces larger expansive force to this air bag, therefore this airbag base fabric must possess the strength characteristics that can fully bear this expansive force, if the intensity of multifilament, lower than 8.0cN/dtex, cannot fully meet safety standards.The comparatively desirable yarn strength of multifilament used in the present invention is more than 8.3cN/dtex, more preferably more than 8.5cN/dtex.
In addition, the boiling water shrinkage of the precursor before weaving is necessary for 5～15%.If boiling water shrinkage is less than 5%, can not get low venting quality, if be greater than 15%, the fabric thickness thickening after shrinking, damages compactedness, therefore unsatisfactory.Using the value of boiling water shrinkage is that the precursor of 5～15% left and right is comparatively desirable, but more preferably 8～12%.The value of this boiling water shrinkage, the draw ratio during according to manufacture precursor and HEAT SETTING and relaxation rate decide.,, for making precursor reach intensity, percentage elongation, the boiling water shrinkage of regulation, only need to adjust to create conditions.
Be not particularly limited about weaving method, but consider from the uniformity of base cloth physical property, plain weave is good, is not particularly limited at air-jet loom, Rapier looms and water jet looms etc., but considers from weaving efficiency about loom, and water jet looms is comparatively desirable.
For the cloth after weaving, should make its contraction by heating.When contraction, need to process the excess feeding that cloth is not applied tension force with 0～15% condition.For not special provision for the treatment of temperature, but conventionally at 70～200 DEG C, be embodied as.More preferably 80～160 DEG C.In the time being applied with tension force or in the time that temperature is too low, the contraction of fabric is insufficient, cannot obtain venting quality required for the present invention, therefore unsatisfactory.If heat treatment temperature is too high, because making yarn, excess shrinkage attenuates, and the yarn abundance on fabric intersection point reduces, and venting quality uprises, therefore unsatisfactory.Desirable excess feed rate when this contraction is 1～12%, and 2～10% is even more ideal.
In addition, temperature when this contraction, can be also baking temperature, but also can by make fabric in the water of set point of temperature or hot water by realizing, therefore comparatively desirable.
For in water or hot water by and shrink fabric need to be dried, but when dry even a little also needs to give excess feeding.This excess feed rate, is 0～1% in longitude and latitude two directions, comparatively it is desirable to 0～0.5%, and more preferably 0～0.3%.By being set as this excess feed rate, can make the monofilament of the yarn using in fabric launch and reduce venting quality, can make venting quality index within the limits prescribed simultaneously.
In addition, baking temperature is now 120 DEG C～180 DEG C, more preferably 125 DEG C～160 DEG C.If baking temperature is too low, dry time that need to be longer, therefore very ineffective; If too high, because making yarn, the residual contraction of precursor shrinks, and monofilament shrinks, thereby the expansion of monofilament is reduced, and likely makes the venting quality of fabric uprise (variation).
Through the cloth for the treatment of process of the present invention, it not only meets the performance as air bag cloth, but also aspect venting quality, has splendid performance.; the multifilament that meets above-mentioned condition is being carried out under woven state as warp thread and weft yarn; the coverage coefficient (CF) of trying to achieve according to following formula is in 1900～2300 scope; and the total fineness D (dtex × 9/10) of warp thread and weft yarn and above-mentioned warp thread and the W (mm) of weft yarn under fabric state meet following relational expression
Below the D/W=700 of warp thread, below the D/W=850 of weft yarn,
CF=√ [total fineness (dtex × 9/10) of warp thread] × warp count (root/2.54)+√ [total fineness (dtex × 9/10) of weft yarn] × weft count (root/2.54).
That is, above-mentioned cover index be with the total fineness of warp thread and weft yarn with and each density meter be shown in the index of fiber aeration under fabric state, in other words represent weaving density, this value is larger represents that gap between yarn is less and air-tightness is higher.But the flexibility of fabric can decline, and become heavy.That is, along with diminishing of coverage coefficient, fabric becomes soft and lightens, but air-tightness starts to reduce.Its process that Here it is.Therefore, if guarantee appropriate flexibility and sufficient air-tightness (low aeration), need to determine appropriate CF value, according to the inventor's etc. confirmation discovery, this CF value, in the time of 1900～2300 scope, can possess above-mentioned two specific characters simultaneously.
In addition, the above-mentioned characteristic of base cloth for air bag, except above-mentioned CF value, the total fineness D (dtex × 9/10) of warp thread and weft yarn and width W (mm) (with reference to Fig. 1) meet the relation of above-mentioned formula, are the necessary conditions of the low aeration of evaluate safety air bag.; above-mentioned setting formula is that the width of the warp thread under the total fineness of warp thread and weft yarn fabric state and weft yarn is removed to the value drawing after calculation, and it is illustrated in the index of how monofilament that forms warp thread and weft yarn being launched, the gap between monofilament and monofilament being diminished to width one by one on fabric in base cloth plane.
This is deployed in monofilament fineness and crosses thick or while using twist yarn or the interlacing number of degrees are higher and tightening up property is higher yarn, the tightening up property of yarn entirety uprises and makes the value of D/W become large, cannot guarantee gratifying low aeration.But these values at the D/W of warp thread are below 700, the D/W of weft yarn is below 850 time, even if do not carry out face coat processing and calendering processing after weaving, also can guarantee all-the-time stable and good low aeration.
; a kind of air bag base cloth is successfully provided according to the present invention; it is as guaranteeing the strength characteristics of air bag and the necessary condition of flexibility; except the total fineness and monofilament fineness of regulation multifilament; also specify CF value under fabric state and the D/W value of warp thread and weft yarn; thereby guarantee low aeration, and make its light weight and cheap.Below 670, be good about the D/W value of warp thread, 600 with next even more ideal.Although be not particularly limited lower limit, comparatively desirable more than 200.Below 800, be good about the D/W value of weft yarn, 750 with next better.Although be not particularly limited lower limit, comparatively desirable more than 350.
In the present invention, be preferably more than 4% from the warp thread of fabric unwinding and the curling rate variance of weft yarn.The manufacturing technique of fabric weaving, in shrinking process (refinery practice), drying process, need at least in one direction, fully shrinks it under the state that does not apply tension force.Its result, has the feature that the crimp percent at least one direction uprises.For the crimp percent at least one direction is uprised, especially in drying process, need to carry out excess feeding.If apply tension force on longitude and latitude both direction in drying process, its result reduces because the contraction of yarn makes the crimp percent of filling yarn, the direction simultaneously reducing in crimp percent, and venting quality uprises.Therefore, in without coated fabric, the venting quality of cloth and silk uprises, unsatisfactory as air bag cloth.Desirable curling rate variance is more than 5%, more than 6% even more ideal.Although the upper limit of being not particularly limited is more firmly below 10%.
[embodiment]
Below, to enumerate embodiment and further illustrate the present invention, but the present invention is not limited to following embodiment in the nature of things, in the nature of things, before and after meeting, in the scope of described aim, all can be changed and implement, these are all contained in technology category of the present invention.The method of testing of the various performances that adopted in the following embodiments in addition, is as described below.
(1) total fineness: according to JIS L1013:19998.3.1A method, measure conditional weight fineness and as total fineness under given load 0.045cN/dtex.
(2) long filament number: by the cross section bust shot of yarn, go out long filament number by cross-section photograph number with stereoscope.
(3) monofilament fineness: the value that has used total fineness to draw divided by long filament number.
(4) intensity percentage elongation: measure under the isodromicing elongation's condition showing in test in the time of JIS L1013:19998.5.1 standard." universal testing machine " (TENSILON) UCT-100 that has used ORIENTEC company to manufacture to sample, divides and measures with chuck spacing 25cm, draw speed 30cm/.In addition, percentage elongation is tried to achieve according to the elongation of the point that represents ultimate strength in S-S curve.
(5) precursor interlacing degree: measure according to JIS L1013:19998.15.
(6) precursor boiling water shrinkage (SHW): boiling water shrinkage: precursor is sampled as to spool shape, at 20 DEG C, the indoor adjusting of temperature and humidity regulation of 65%RH more than 24 hours, on sample, apply be equivalent to 0.045cN/dtex load measurement length L 0.Then, speeding under slow state, after in boiling water, this sample being soaked 30 minutes, above-mentioned temperature and humidity regulation room-dry 4 hours, again after sample applies the load that is equivalent to 0.045cN/dtex, measuring length L 1.Obtain boiling water shrinkage according to each length L 0 and L1 and following formula.
Boiling water shrinkage=[(L0-L1)/L0] × 100 (%)
(7) Density: measure according to JIS L1096:19998.6.1.Sample is put on platform, removes factitious fold and tension force, go out the warp thread of 2.54cm length and the radical of weft yarn at mutual 5 different number positionals, calculate each mean value.
(8) coverage coefficient (CF): represent by following formula.
CF=√ (total fineness (dtex) × 9/10 of the warp thread of unwinding) × warp count (root/2.54cm)+√ (total fineness (dtex) × 9/10 of the weft yarn of unwinding) × weft count (root/2.5cm)
(9) intensity of cloth: according to JIS L1096:19998.12.1A method (strip method), respectively to longitudinally and laterally carrying out determination test.Choose respectively 5 of test films, take off yarn to make its width be 50mm from the both sides of width, use isodromicing elongation's type testing machine, stretch until test film is disconnected with chuck spacing 200mm, draw speed 200mm/min, peak load before determination test sheet disconnects, calculates respectively longitudinal and horizontal mean value.
(10) elongation at break: according to JIS L1096:19998.12.1A method (strip method), respectively to longitudinally and laterally carrying out determination test.Choose respectively 5 of test films, take off yarn to make its width be 50mm from the both sides of width, draw the graticule at 100mm interval at the central portion of these test films, use isodromicing elongation's type testing machine, stretch until test film disconnects with chuck spacing 200mm, draw speed 200mm/min, distance while reading test film disconnection between graticule, and calculate elongation at break according to following formula, calculate respectively longitudinal and horizontal mean value.
(11) unwinding yarn interlacing degree: take out yarn from fabric, measure according to JIS L1013:19998.15.
(12) crimp percent: take out yarn from fabric, measure according to JIS L1096:19998.7.2B method.In addition,, for the indefinite fabric of direction of warp and weft, the direction that crimp percent value is greater than to peer-level is as warp-wise.
(13) conditional weight: according to JIS L1096:19998.4.2, get 3 of the test films of 20cm × 20cm, measure respectively quality (g), by the every 1m of its mean value
2quality (g/m
2) represent.
(14) thickness: according to JIS L1096:19998.5, utilize thickness measurement equipment, 5 of sample different parts are applied after the pressure of 23.5kPa, measured the thickness after 10 seconds.Using mean value as thickness.
(15) width W (mm) of mensuration yarn: by the surface picture of the sample of modulating according to JIS L1096:1999.3, use scanning electronic microscope (SEM) to take (with reference to the part amplification view of Fig. 1), obtain the widest part W1 of width (mm) taking unit length on this photo as standard, will be divided by taking the value of multiplying power T (doubly) as the width W (mm) of yarn.
W(mm)＝W1/T
(16) D/W of warp thread and weft yarn:
Value by the fineness of warp thread and weft yarn (DENIER) after divided by the width W (mm) of yarn obtained above.
(17) venting quality: measure according to JIS L1096:19998.27.1A method (Fu Leize type method).By test pressure differential resetting be regulation pressure and measure throughput.Choose the test film of about 20cm × 20cm from 5 different parts of sample, by test film, to be installed on bore be cylinder one end of 100mm and fixed, so that there is not air leakage from installation position, and use adjuster test pressure reduction to be adjusted to the pressure of regulation, utilize flowmeter survey now to flow through the air mass flow of test film, improve pressure gradually and measure.Calculate the mean value of 5 test films.
(18) bending strength: measure according to JISL10968.19.1A method (45 ° of cantilever methods).
(embodiment 1): by the multifilament of the 235dtex/72f being formed by nylon 66 (intensity: 8.5cN/dtex, interlacing degree: 20/m), under non-twist state, be used as warp thread and weft yarn and weave plain cloth, and carry out refining, dry, heat treatment, the fabric that to produce warp count and be 73 pieces/inch, 73 pieces/inch of weft counts, coverage coefficient (CF) be 2123.Be displayed in Table 1 the physical property of obtained fabric.The aeration that also can be well understood to this fabric by table 1 is extremely low, and bending strength little, there is good flexibility, be highly suitable for air bag base cloth.
(embodiment 2): by the multifilament of the 270dtex/84f being formed by nylon 66 (intensity: 8.5cN/dtex, interlacing degree: 20/m), under non-twist state, be used as warp thread and weft yarn and weave plain cloth, and carry out refining, dry, heat treatment, the fabric that to produce warp count and be 69 pieces/inch, weft count and be 69 pieces/inch, coverage coefficient (CF) be 2151.The physical property of the fabric that obtains is as shown in table 1.The aeration of this fabric is extremely low, and bending strength little, there is good flexibility, be highly suitable for air bag base cloth.
(embodiment 3): by the multifilament of the 350dtex/108f being formed by nylon 66 (intensity: 8.4cN/dtex, interlacing degree: 19/m), under non-twist state, be used as warp thread and weft yarn and weave plain cloth, and carry out refining, dry, heat treatment, the fabric that to produce warp count and be 59 pieces/inch, weft count and be 59 pieces/inch, coverage coefficient (CF) be 2094.The physical property of the fabric that obtains is as shown in table 1.The aeration of this fabric is extremely low, and bending strength little, there is good flexibility, be highly suitable for air bag base cloth.
(embodiment 4): by the multifilament of the 400dtex/108f being formed by nylon 66 (intensity: 8.5cN/dtex, interlacing degree: 20/m), under non-twist state, be used as warp thread and weft yarn and weave plain cloth, and carry out refining, dry, heat treatment, the fabric that to produce warp count and be 58 pieces/inch, weft count and be 56 pieces/inch, coverage coefficient (CF) be 2163.The physical property of the fabric that obtains is as shown in table 1.The aeration of this fabric is extremely low, and bending strength little, there is good flexibility, be highly suitable for air bag base cloth.
(embodiment 5): by the multifilament of the 470dtex/144f being formed by nylon 66 (intensity: 8.4cN/dtex, interlacing degree: 21/m), under non-twist state, be used as warp thread and weft yarn and weave plain cloth, and carry out refining, dry, heat treatment, the fabric that to produce warp count and be 49 pieces/inch, weft count and be 49 pieces/inch, coverage coefficient (CF) be 2016.The physical property of the fabric that obtains is as shown in table 1, and the aeration of this fabric is extremely low, and bending strength little, there is good flexibility, be highly suitable for air bag base cloth.
(comparative example 1): by the multifilament of the 350dtex/108f being formed by nylon 66 (intensity: 8.4cN/dtex, interlacing degree: 19/m), under non-twist state, be used as warp thread and weft yarn and weave plain cloth, and carry out refining, dry, heat treatment, the fabric that to produce warp count and be 58 pieces/inch, weft count and be 59 pieces/inch, coverage coefficient (CF) be 2077.But, when dry, on warp-wise, carry out-1.0% excess feeding, apply 1.0% tensile stress, in broadwise, obtain with dry before the same width of fabric width, obtain fabric by pin stenter fixed width direction.The physical property of the fabric that obtains is as shown in table 1.The aeration that also can be well understood to this fabric by table 1 increases because yarn width diminishes, and venting quality index also becomes 1.1 thereupon, when air-bag deployment, passenger's protective value is reduced.
(comparative example 2): by the multifilament of the 270dtex/84f being formed by nylon 66 (intensity: 8.2cN/dtex, interlacing degree: 42/m), weave plain cloth as warp thread and weft yarn under non-twist state.In addition, because interlacing degree is increased to 42, the tightening up property of yarn becomes well, but can find a lot of fine hair, also finds the decline of intensity.Similarly to Example 2 this plain cloth is carried out to refining, dry, heat treatment, the fabric that to produce warp count and be 69 pieces/inch, weft count and be 69 pieces/inch, coverage coefficient (CF) be 2151.The physical property of the fabric that obtains is as shown in table 1.The aeration that also can be well understood to this fabric by table 1 increases because yarn width diminishes, and venting quality index also becomes 1.1 thereupon, when air-bag deployment, passenger's protective value is reduced.
[table 1]
Industrial utilizability
The present invention can provide a kind of air bag base cloth, its regulation forms total fineness and monofilament fineness and the precursor intensity of the multifilament of base cloth, specify the relation between coverage coefficient (CF) and total fineness D (dtex) and the width W (mm) of warp thread and weft yarn under fabric state simultaneously, therefore the venting quality under 50kPa has the venting quality index of regulation, impact can alleviate passenger and airbag crash time, and lighter, cheap.
Claims (5)
1. an air bag high-density fabric, is characterized in that, the venting quality under 50kPa pressure reduction is 3.3L/cm
2below/min, and the venting quality index (50kPa) of trying to achieve according to formula 1 is more than 1.2,
Venting quality index (50kPa)
=(Log (Q (55kPa))-Log (Q (45kPa)))/(Log55-Log45) ... (formula 1)
Q (55kPa): the venting quality (1/cm under 55kPa pressure reduction
2/ min)
Q (45kPa): the venting quality (1/cm under 45kPa pressure reduction
2/ min).
2. air bag high-density fabric according to claim 1, is characterized in that, from the warp thread of high-density fabric unwinding or weft yarn the interlacing number of degrees of at least one be 8/below m.
3. according to claim 1 or air bag high-density fabric claimed in claim 2, it is characterized in that, be 160～580dtex from the warp thread of high-density fabric unwinding or the total fineness of weft yarn, the monofilament fineness that total fineness draws divided by the monofilament number that forms total fineness is 1～4dtex, the total fineness D (dtex × 9/10) of the warp thread of high-density fabric and weft yarn meets following relational expression with this warp thread and the width W (mm) of weft yarn under fabric state, below the D/W=700 of warp thread, below the D/W=850 of weft yarn, and coverage coefficient (CF) is in 2000～2400 scopes.
4. according to claim 1 or air bag high-density fabric claimed in claim 2, it is characterized in that, is more than 4% from the warp thread of fabric unwinding and the curling rate variance of weft yarn.
5. air bag high-density fabric according to claim 2, is characterized in that, the interlacing degree of weaving front precursor is 10～30/m.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013029848 | 2013-02-19 | ||
| JP2013-029848 | 2013-02-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103993404A true CN103993404A (en) | 2014-08-20 |
Family
ID=49249650
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320141850.4U Expired - Lifetime CN203222640U (en) | 2013-02-19 | 2013-03-26 | High-density fabric for safety air bag |
| CN201310099822.5A Pending CN103993404A (en) | 2013-02-19 | 2013-03-26 | High-density fabric for safety air bag |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320141850.4U Expired - Lifetime CN203222640U (en) | 2013-02-19 | 2013-03-26 | High-density fabric for safety air bag |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN203222640U (en) |
Cited By (1)
| 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 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2013
- 2013-03-26 CN CN201320141850.4U patent/CN203222640U/en not_active Expired - Lifetime
- 2013-03-26 CN CN201310099822.5A patent/CN103993404A/en active Pending
Cited By (1)
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN203222640U (en) | 2013-10-02 |
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Application publication date: 20140820 |