CN102465379A - Texture for gas bag - Google Patents

Abstract

The invention discloses a texture for a gas bag. At least one continuous warp thread or weft thread, of which the ratio of standard deviation of thread breadth and the average value of thread breadth is 3.0 to 10.0 percent, is included in 10 continuous warp threads or weft threads. The texture for the gas bag has higher surge resisting force, is excellent in flexibleness and low in aeration degree.

Description

A kind of air bag is used fabric

Technical field

Sutured portion slippage air bag very little, soft and low air permeability is used fabric when the present invention relates to a kind of airbag deployment.

Background technology

Over year, improve the installation rate rapidly as the raising of the air bag Along with people's awareness of safety of one of automotive safety spare part.When automobile bumped, driver and passenger can hit the steering wheel inner part of waiting for bus at a high speed, come to harm.Protection systems such as safety belt and air bag are installed on automobile, can be when colliding on the seat passenger restraint, the displacement of restriction head of passenger, chest is avoided and car inner part generation sharp impacts, thereby is played a protective role.The discharging throttling damping of air bag through air bag absorbs passenger's kinetic energy to reach protection passenger's purpose.

Among the patent CN1259177A, be 550～650 dtexs with the line density scope, the monofilament radical is the airbag of 100～125 polyamide filaments manufacturing in the yarn, and the scope of this fabric rate of loading dynamic venting quality (SWDP) value is 0.1～0.3 (lmm/dm ²MinkPa), more preferably 0.2～0.25 (lmm/dm ²MinkPa); But do not tell about in the above-mentioned patent air bag with fabric through the standard deviation of, weft yarn knee radius of curvature with through the ratio of, weft yarn knee radius of curvature; Do not relate to fabric and have high slippage resistance; Thereby can not understand air bag upon deployment with base cloth, whether slippage is very big for sutured portion.

Summary of the invention

Slippage on sewed part air bag little, soft and low air permeability is used fabric when the object of the present invention is to provide a kind of airbag deployment.

Technical solution of the present invention is:

A kind of air bag is used fabric, and is at least a in per 10 continuous warp yarns or the weft yarn on this fabric face, and the ratio of the standard deviation of its yarn fabric width and its fabric width mean value is 3.0～10.0%.The standard deviation that comprises per 10 continuous warp yarns fabric widths and the ratio of its fabric width mean value are 3.0～10.0%, the ratio of the standard deviation of per 10 continuous weft fabric widths and its fabric width mean value is 3.0～10.0%, the standard deviation of per 10 continuous warp yarns fabric widths and the ratio of its fabric width mean value and the standard deviation of per 10 continuous weft fabric widths and the ratio of its fabric width mean value all are 3.0～10.0% 3 kinds of modes.

The computing formula (1) of 10 continuous yarn fabric width mean values is:

$\stackrel{\‾}{x}=\frac{\mathrm{\Σ}{x}_i}{10}=\frac{x_1+x_2+\mathrm{\Λ}+x_{10}}{10}$ (formula 1)

The computing formula of the standard deviation of 10 continuous yarn fabric widths (2) is:

$S=\sqrt{\frac{10\mathrm{\Σ}{X}^2-{\left(\mathrm{\Σ}\stackrel{\‾}{X}\right)}^2}{10(10-1)}}$ (formula 2)

The ratio

of the standard deviation of fabric width and its fabric width mean value

Wherein, X is the yarn fabric width.The standard deviation reflection relaxation shrinkage of yarn fabric width is with respect to the dispersion degree of its mean value.

Air bag of the present invention is with at least a in per 10 continuous warp yarns or the weft yarn in the fabric, and the ratio of the standard deviation of its yarn fabric width and its fabric width mean value is 3.0～10.0%, and is preferred 5.0～7.0%, can guarantee that fabric is higher through the slippage resistance of, broadwise.If the ratio of the ratio of the standard deviation of per 10 continuous warp yarns fabric widths and its fabric width mean value and the standard deviation of per 10 continuous weft fabric widths and its fabric width mean value all＜3.0%; Then fabric is little through the slippage resistance of broadwise, is unfavorable for preventing effectively impact and the stretching action of high pressure-temperature air-flow to air bag.

A kind of air bag is used fabric, and the warp-wise slippage resistance of this fabric is 400～1000N, and broadwise slippage resistance is 300～900N.Testing standard according to ASTM D6479-02 slippage resistance is tested.If the characteristic of the high slippage resistance fabric that air bag is used at length is described, then constitute fabric through broadwise slippage resistance more than 400N for preferred, 600N～900N is above for more preferably.The high pressure-temperature air-flow was to the impact and the stretching action of air bag when high slippage resistance can make air bag bear inflation.If the warp of fabric, broadwise slippage are had a low resistance in 300N, then rerum natura is bad upon deployment for fabric; If the slippage resistance of fabric is higher than 1000N, then the cohesive force between silk and the silk is very big in the fabric, and fabric face is harder, and air bag is difficult for folding.

A kind of air bag is used fabric, and it is 100～400N that the warp-wise of this fabric is torn brute force, and the brute force of tearing of broadwise is 100～400N.

A kind of air bag is used fabric, when pressure is 19.6KPa, and the air permeability＜2.0L/cm of fabric ²Below/the min, preferred 1.5L/cm ²Below/the min.If the air permeability＞2.0L/cm of fabric ²/ min, then air bag can not launch in time, causes losing the protective effect to human body.

A kind of air bag is used fabric, the warp of this fabric, broadwise size changing rate＜3.0%.Its size changing rate calculates according to formula (3),

$E(\%)=\frac{L_0-L_1}{L_0}\×100$ (formula 3)

L ₀: the size (cm) before the fabric heat treatment

L ₁: the size after the fabric heat treatment (cm)

Preferred below 2.5%, more preferably below 1.5%.If the warp of fabric, broadwise size changing rate＞3.0%, the thickness thickening of fabric is unfavorable for the miniaturization of air bag with fabric.Heat treated of the present invention was handled 30 minutes at 150 ℃ usually, handled available baking oven.

A kind of air bag is used fabric, and forming this fabric contains synthetic fiber in 60～144 monofilament, the fabric in the long filament of the synthetic fiber of, weft yarn fineness is 300～700dtex.Consider from aspects such as the flexibility of fabric, taking in property, slippage resistance, tearing strengths, with filament number about 2～8dtex, total fiber number is the best about 350～500dtex.

Air bag of the present invention is used manufacturing method of fabrics, comprises warping, weaves and dry, and at least a when wherein weaving in continuous warp yarns and/or the weft yarn has tension difference, comprises continuous warp yarns, continuous weft, continuous warp yarns and three kinds of modes of continuous weft.Consider the uniformity of the rerum natura of base fabric, be advisable that loom does not have special qualification yet, can select water jet looms, Rapier looms and air-jet loom etc. for use with plain weave.

Air bag of the present invention has high slippage resistance, good flexibility and low air permeability with fabric.

The specific embodiment

Through following examples, the present invention is described in further detail.Rerum natura among the embodiment is measured by following method.

[through the standard deviation of weft yarn fabric width]

Specific practice is: takes with electronic scanner microscope yarn to specimen surface under 50 multiplying powers, measures the distance of yam surface the widest part, and 10 data of continuous measurement successively, the standard deviation that calculates is as the standard deviation of fabric through, latitude fabric width.

[density]

According to JIS L 10968.6 densimetrys, with pick glass measure fabric through filling density.

[thickness]

According to JIS L 10968.5 thickness method, the pressure of test is 23.5kPa (240gf/cm2).

[slippage resistance]

Testing standard according to ASTM D6479-02 slippage resistance is tested.Concrete grammar is, clipping to the sample of 5 * 30 (cm) on the special-purpose device of slippage resistance test on the tension test appearance, and the chuck spacing of tension test appearance is 20cm, makes an experiment with the speed of 200mm/min.

[tearing brute force] through broadwise

Specific practice: get the safe air bag fabric sample of 7.6cm * 20cm, cut off the openning of one 7.5cm from the central authorities of sample one end.Fracture strength according to the stretching test method test fabric of JIS K-6404 fabric.Concrete method of testing is following: sandwiching in fabric sample the tension test appearance folder mouthful, the folder mouth of tension test appearance is apart from being 150mm, makes an experiment with the test speed of 200mm/min.

[air permeability]

On the high-pressure process permmeter, carry out this test.Concrete method of testing is following: draw 13 of the circular specimens that diameter is 10cm successively along the fabric width direction of fabric, the air permeability of each sample of test under the pressure of 19.6KPa is then got the most last result of the test of mean value of 9 data in centre at last.

[size changing rate]

Testing standard according to JIS L-1042 dry-hot shrinkage is tested.Concrete grammar is that specimen size is 30cm * 30cm, on each sample, marks the line L of 20cm with straight line ₀, through each 3 of broadwises, be evenly distributed, carry out 150 ℃ * 30min heat treatment, (distance L of graticule is measured in damping>=24hr) again for 20 ± 2 ℃ of standard conditions temperature, relative humidity 65 ± 2% after the damping ₁According to formula E=(L ₀-L ₁)/L ₀* 100, calculate dry-hot shrinkage.

Embodiment 1

The employing total fineness is that 470dtex, monofilament radical are that 72, ultimate strength are that 39.5N, elongation at break are that 23.5% cross section is circular polyamide fibre 66 raw yarns.With above-mentioned raw yarn through sample warping machines warping, be woven into plain cloth with the single injector water jet looms again after, and carry out dried at 80 ℃, the acquisition warp count is that 53 pieces/inch, weft count are that 53 pieces/inch air bag is used fabric.Estimate the characteristic of this fabric, and be shown in table 1, the table 2.

Embodiment 2

The employing total fineness is that 470dtex, monofilament radical are that 136, ultimate strength are that 40.5N, elongation at break are that 23.0% cross section is circular polyamide fibre 66 raw yarns.With above-mentioned raw yarn through sample warping machines warping, be woven into plain cloth with the twin-jet nozzle water jet looms again after, and carry out dried at 80 ℃, the acquisition warp count is that 53 pieces/inch, weft count are that 53 pieces/inch air bag is used fabric.Estimate the characteristic of this fabric, and be shown in table 1, the table 2.

Embodiment 3

The employing total fineness is that 595dtex, monofilament radical are that 136, ultimate strength are that 50.9N, elongation at break are that 24.6% cross section is circular polyamide fibre 66 raw yarns.With above-mentioned raw yarn process beam warper warping; After being woven into plain cloth with the twin-jet nozzle water jet looms again; And carry out concise HEAT SETTING 160 ℃ of 65 ℃ of refining temperatures, 40 ℃ of washing temperature, 120 ℃ of baking temperatures, heat setting temperature and handle, the air bag that obtains warp count and be 44 pieces/inch, weft count and be 44 pieces/inch is used fabric.Estimate the characteristic of this fabric, and be shown in table 1, the table 2.

Comparative example 1

The employing total fineness is that 470dtex, monofilament radical are that 72, ultimate strength are that 39.5N, elongation at break are that 23.5% cross section is circular polyamide fibre 66 raw yarns.With above-mentioned raw yarn through the beam warper warping, be woven into plain cloth with the single injector water jet looms again after, and carry out dried at 80 ℃, the acquisition warp count is that 53 pieces/inch, weft count are that 53 pieces/inch air bag is used fabric.Estimate the characteristic of this fabric, and be shown in table 1, the table 2.

Comparative example 2

The employing total fineness is that 470dtex, monofilament radical are that 136, ultimate strength are that 40.5N, elongation at break are that 23.0% cross section is circular polyamide fibre 66 raw yarns.With above-mentioned raw yarn through the beam warper warping, be woven into plain cloth with the single injector water jet looms again after, and carry out dried at 80 ℃, the acquisition warp count is that 53 pieces/inch, weft count are that 53 pieces/inch air bag is used fabric.Estimate the characteristic of this fabric, and be shown in table 1, the table 2.

Comparative example 3

The employing total fineness is that 595dtex, monofilament radical are that 136, ultimate strength are that 50.9N, elongation at break are that 24.6% cross section is circular polyamide fibre 66 raw yarns.With above-mentioned raw yarn process beam warper warping; After being woven into plain cloth with the single injector water jet looms again; And carry out concise HEAT SETTING 160 ℃ of 65 ℃ of refining temperatures, 40 ℃ of washing temperature, 120 ℃ of baking temperatures, heat setting temperature and handle, the air bag that obtains warp count and be 44 pieces/inch, weft count and be 44 pieces/inch is used fabric.Estimate the characteristic of this fabric, and be shown in table 1, the table 2.

The rerum natura of table 1 yarn

The rerum natura of table 2 fabric

Zero: good △: general *: poor

Can know that from the evaluation result of table 1, table 2 air bag that embodiment 1～3 makes is used comparing with fabric with the air bag that fabric and comparative example 1～3 make, the slippage resistance is high, air permeability is low.Further, embodiment 1 is best, and the ratio of the standard deviation of per 10 continuous warp yarns fabric widths and its fabric width mean value is when big more, and the air bag that makes is high more with the slippage resistance of fabric.

Claims (6)

1. an air bag is used fabric; It is characterized in that: on this fabric face; At least a in per 10 continuous warp yarns or the weft yarn, the ratio of the standard deviation of its yarn fabric width and its fabric width mean value is that the computing formula (1) of 3.0～10.0%, 10 continuous yarn fabric width mean values is:

$\stackrel{\‾}{x}=\frac{\mathrm{\Σ}{x}_i}{10}=\frac{x_1+x_2+\mathrm{\Λ}+x_{10}}{10}$ (formula 1)

The computing formula of the standard deviation of 10 continuous yarn fabric widths (2) is:

$S=\sqrt{\frac{10\mathrm{\Σ}{X}^2-{\left(\mathrm{\Σ}\stackrel{\‾}{X}\right)}^2}{10(10-1)}}$ (formula 2)

The ratio of the standard deviation of fabric width and its fabric width mean value

Wherein, X is the yarn fabric width.

2. air bag according to claim 1 is used fabric, it is characterized in that: this fabric warp-wise slippage resistance is 400～1000N, and broadwise slippage resistance is 300～900N.

3. air bag according to claim 1 is used fabric, it is characterized in that: it is 100～400N that the warp-wise of this fabric is torn brute force, and the brute force of tearing of broadwise is 100～400N.

4. air bag according to claim 1 is used fabric, it is characterized in that: when pressure was 19.6KPa, the air permeability of this fabric was＜2.0L/cm ²/ min.

5. air bag according to claim 1 is used fabric, it is characterized in that the warp of this fabric, broadwise size changing rate＜3.0%.

6. air bag according to claim 1 is used fabric, it is characterized in that: forming this fabric contains synthetic fiber in 60～144 monofilament, the fabric in the long filament of the synthetic fiber of, weft yarn fineness is 300～700dtex.