JP4258947B2 - Bag-woven airbag base fabric and bag-woven airbag - Google Patents

Description

表１から明らかなように、実施例１、２の場合は、折り畳み性の代用メジャーであるＬ値での高さが小さく、しかも隙間が無くなる荷重も小さいことから、袋織りエアバッグ基布の折り畳み性は良好であることがわかる。また、実施例１の場合、エアバッグ基布の嵩高性評価に関しても低い値を示しているため、本実施例の袋織りエアバッグ基布は嵩高くならず、エアバッグの収納性は大変良好となる。
【００４７】
実施例２の場合は、嵩高性評価こそ実施例１に劣るものの、折り畳み作業性や、折りぐせの付き易さの点からエアバッグの収納性は良好と言える。
【００４８】
これに対し、図３の構成で作成された比較例ｌの場合、実施例ｌ、２に存在するＣ部が存在しないため、折り畳み性の代用メジャーであるＬ値での高さが大きく、しかも、隙間が無くなる荷重も大きいことから、袋織りエアバッグ基布の折り畳み性は不良であることがわかる。また、比較例１の場合、エアバッグ基布の嵩高性評価に関しても高い値を示しているため、比較例１の袋織りエアバッグ基布は嵩高くなり、エアバッグの収納性は不良となる。
【００４９】
参考例１の場合、実施例１、２と同様Ｃ部を有しているため、エアバッグの折り畳み作業性や、折りぐせの付き易さなどは良好であり、エアバッグの収納性も良好であるが、エアバッグ基布製織の際の停台回数が多く、製織性が悪い。
【００５０】
【発明の効果】
本発明の袋織りエアバッグ基布は、袋部（２重部）を取り囲むように形成される接結１重部（ｌ重部）の外周部において、エアバッグ作動時に膨張しない袋部（図１、２のＣ部に相当）を有することによって、さらに、この袋部が好ましくはエアバッグ折り畳み間隔に合わせて存在することによって、折り畳み作業性が一層良好になり、折りぐせが容易に付き、折り畳んだエアバッグが嵩高くならない。その結果、エアバッグを収納スペースヘ収納する際の収納性に優れており、さらに、エアバッグ折り畳み工程の作業性を向上させる袋織りエアバッグ基布となる。
【図面の簡単な説明】
【図１】本発明による袋織りエアバッグ基布の一例を示す平面図
【図２】本発明による袋織りエアバッグ基布の変形例を示す平面図
【図３】従来技術の袋織りエアバッグ基布の一例を示す平面図
【図４】図ｌの破線部拡大断面模式図
【図５】Ｌ値評価方法の説明図
【符号の説明】
Ａ 袋部（２重部）
Ｂ 外周部
Ｃ エアバッグ作動時に膨張しない２重部
Ｄ 接結１重部[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a bag-woven airbag base fabric and a bag-woven airbag used for an airbag, which is one of safety parts for automobiles, and more particularly, a bag that is particularly useful for protecting a passenger in a transportation vehicle from the front or side. The present invention relates to a woven airbag base fabric and a bag woven airbag using the same.
[0002]
[Prior art]
In recent years, as one of the safety parts for automobiles, the mounting rate of airbags has been rapidly improved along with the improvement of passenger safety awareness. Airbags are used to protect passengers by generating high-temperature and high-pressure gas from inflators when a vehicle crash occurs, and by using the gas to rapidly deploy the airbag. It is.
[0003]
Conventionally, an airbag that protects an occupant in the event of a collision from the front of the driver's seat or passenger seat has been mounted, but recently, an airbag that can cope with a collision from the side has been developed.
[0004]
Conventionally, airbags for driver seats and passenger seats are produced by sewing two airbag base fabrics. Recently, however, bag weaving techniques that can form bags at the weaving stage have attracted attention because of demands for improving the performance of airbags and reducing manufacturing costs.
[0005]
In addition, side protection airbags often assume automobile rollovers, and unlike airbags for driver seats and passenger seats, it is necessary to secure an internal pressure holding time of several seconds to 10 seconds after deployment. It is said that there is. It is designed to protect the occupant's head even when the vehicle rolls over. Since it is necessary to secure the internal pressure holding time after deployment, it is necessary to prevent gas leakage from the woven fabric body. However, since there is air leakage from the seam in the sewn product, it is not practical. Therefore, the present situation is that the surface of the bag-woven airbag base fabric is coated.
[0006]
By the way, recently, as the vehicle becomes lighter and more compact, the storage space for the airbag is decreasing. Therefore, not only the lightweight and compact air bag base fabric itself but also a good folding and storing property of the air bag base fabric is required.
[0007]
In the case of bag-woven airbags for driver seats and passenger seats, it is not necessary to maintain internal pressure for several seconds to 10 seconds, so uncoated fabrics are usually used for light weight and compactness, and high-density fabrics with low breathability. Is needed. Moreover, air bag leaks from the single and double misalignments and the jumping out of the residue from the inflator when deploying any bag-woven airbag for driver seats, passenger seats, and side protection. In order to solve this problem, a high-density fabric is required.
[0008]
[Problems to be solved by the invention]
However, in the case of a bag-woven airbag base fabric in which all the warp yarns have an l-fold portion, the single-fold portion has approximately twice the number of warp yarns per unit area compared to the double portion, and the hardness of the base fabric increases. Therefore, when storing the airbag, there is a problem that it is difficult to fold, the folding property is lowered, and the storing property is deteriorated. In particular, this tendency becomes remarkable in the case of a high-density fabric.
[0009]
Therefore, the present invention solves the problems of the bag-woven airbag base fabric of the above-described conventional technology, particularly the problems relating to the storage and folding properties of the airbag, and uses a high-quality bag-woven airbag base fabric and the same. An object is to provide a bag-woven airbag.
[0010]
[Means for Solving the Problems]
In order to achieve the above-mentioned problems, the present inventors have intensively studied, and as a result, have completed the bag-woven airbag base fabric of the present invention having the following characteristics.
[0011]
The characteristic configuration of the bag-woven airbag base fabric according to the present invention is an airbag base fabric having a bag portion formed by combining fabrics by bag weaving, and is formed so as to surround the bag portion (double portion). It exists in having the double part which does not expand | swell at the time of an airbag operation | movement at least one of the outer peripheral part or inner peripheral part of the connected single structure | tissue (single part).
[0012]
According to this configuration, the folding workability is further improved due to the presence of the double portion that does not inflate when the airbag is operated, the folding is easily performed, and the folded airbag does not become bulky. Therefore, it is excellent in the storage property when storing the airbag in the storage space, and the workability of the airbag folding process can be improved.
[0013]
As a result, when storing the airbag, it is difficult to fold it, the foldability is lowered, and the problems of the prior art such as poor storage performance can be surely solved, and the airbag can be stored and folded. We were able to provide an excellent and high-quality bag-woven airbag base fabric.
[0014]
It is preferable that the double portion that does not expand when the airbag is operated is formed in accordance with the folding pattern and folding interval of the airbag.
[0015]
According to this structure, it can fold through a double part and becomes a thing further superior in foldability, and is convenient.
[0016]
Furthermore, it is preferable that the outer peripheral portion of the bonded single structure has a warp portion that does not have a single portion in any portion in the warp direction or a weft portion that does not have a single portion in at least one portion in the weft direction. .
[0017]
According to this configuration, the warp or the weft from the beam is less likely to be loosened, and the weaving property is stabilized and favorable.
[0018]
The number of warp portions that do not have a single portion in any portion in the warp direction or the number of warp portions that do not have a single portion in any portion in the weft direction is at least one of all the warps or all the wefts in one pattern of the airbag. It is preferably 30% or less of the number.
[0019]
According to this configuration, since warp or weft from the beam is less likely to loosen, the weaving property is stable and favorable. For further weaving stability, the content is preferably 20% or less, more preferably 10% or less.
[0020]
At least one part of the warp or the weft in the outer peripheral part of the single bonded structure formed so as to surround the bag part is any part of at least one of the warp direction or the weft direction according to the interval at which the airbag is folded. It is preferable that no single part is present.
[0021]
According to this configuration, the folding workability is improved and the folding is easy to be attached. Therefore, it is possible to reduce the bulk after the airbag is folded, and the convenience of the airbag can be improved. Good.
[0022]
Furthermore, the characteristic structure of the bag-woven airbag according to the present invention is that the bag-woven airbag base fabric according to any one of claims 1 to 5 is used.
[0023]
According to this configuration, when storing, it is difficult to fold, the foldability is lowered, and the problems of the prior art, such as poor storage, can be surely solved, and the storage property and foldability are excellent. A quality bag-woven airbag can be provided.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
The raw yarn constituting the bag-woven airbag base fabric of the present invention is not particularly limited in material, but is aromatic such as aliphatic polyamide fibers such as nylon 66, nylon 6, nylon 46, nylon 12, and aramid fibers. Homopolyesters such as group polyamide fiber, polyethylene terephthalate and boribylene terephthalate are used. In addition, a wholly aromatic polyester, ultrahigh molecular weight polyethylene fiber, PPS fiber, polyether ketone fiber, or the like can also be used. Of course, polyester fiber and polyamide fiber (nylon 66, nylon 6, nylon 46) are preferable in consideration of economy. In addition, these synthetic fibers include antioxidants, heat stabilizers, smoothing agents, antistatic agents, thickeners, flame retardants, etc., in order to improve process passability in the raw yarn manufacturing process and post-processing process. Various additives may be contained.
[0025]
The coating agent used for preventing the decrease in air permeability and misalignment is not particularly limited, and a synthetic rubber such as chloroprene, chlorosulfonated olefin and silicone is applied, or a rubber-like adhesive is used. May be laminated.
[0026]
Further, the loom used for weaving is not particularly limited, and for example, a water jet room, an air jet room, a rapier room, a projector room, and the like are used. However, it is particularly preferable to use a water jet loom or an air jet loom in consideration of fiber productivity, damage to warps, yarn stains, and the like.
[0027]
When determining the pattern of the bag weave, a jacquard device or a dobby device is used. In particular, in order to obtain a complicated pattern, a jacquard device (electronic type or mechanical type) is required, and an electronic jacquard device is preferable in consideration of productivity and ease of pattern change.
[0028]
Hereinafter, preferred examples of the bag-woven airbag base fabric of the present invention will be described in detail with reference to the drawings.
[0029]
The base fabric shown in FIG. 1 includes a part A which is a bag weaving part (double part), a part B which is an outer peripheral part of the connecting single part, and a bag weaving part (double part) which does not expand when the airbag is activated. It is composed of a certain C part and a D part that is a single part (joining single part) necessary for forming the bag weaving part of the A part. As long as the outer peripheral part which is B part is not a bag weave structure (double part creation structure), it may be basically composed of any structure. The warp of part C has a width of about 2 mm or more, and is composed of 1 unit or more with 4 as a basic unit. Moreover, the number of warp units in part C is 1 to 12 units, more preferably 1 to 10 units. In the figure, a indicates the distance between the central parts of the C part, and is preferably adjusted to the folding interval when the airbag is accommodated, and b indicates the width of the D part and is misaligned when the airbag is deployed. It is preferably 10 mm or more so as not to occur.
[0030]
FIG. 4 shows a schematic cross-sectional view of the dotted line portion (IV line-cross section) in FIG. For simplification, parts B and D in the figure are represented by a plain weave structure.
[0031]
FIG. 2 shows a modification of the bag-woven airbag base fabric of FIG. 1, and the basic base fabric configuration is the same as that shown in FIG. There is a small difference (only the B portion exists in the vertical position of the A portion with respect to the paper surface of FIG. 2 and the C portion does not exist).
[0032]
FIG. 3 shows a planar structure of a bag-woven airbag base fabric according to the prior art for comparison. This bag-woven airbag base fabric forms a bag-weaving portion and a portion A that is a bag-weaving portion (double portion), and a portion B that is the outer peripheral portion of the connecting single portion, as in FIGS. However, there is no bag weaving portion C that exists in FIGS. 1 and 2.
[0033]
In the case of the conventional example shown in FIG. 3, the base fabric bending hardness of the portion B is increased, the folding workability is deteriorated, and the folding work is not easily attached. .
[0034]
In addition, if 30% or more of the total number of warps of the bag-woven airbag base fabric is a warp that does not have a single part in any part, the majority of the outer peripheral part of the connected double part will have a double part in any part. Since the warp is not held, the warp from the beam is loosened and the weaving property is lowered. Therefore, in the bag woven airbag base fabric of the present invention, the ratio of warp yarns having no single part in any part is preferably 30% or less of the total number of warp yarns, and more preferably for weaving stability. It is 20% or less, more preferably 10% or less.
[0035]
Further, by inserting a C portion as shown in FIGS. 1 and 2 in the folding pattern and folding interval at the time of storing the airbag, the folding workability is improved and the folding is easily attached. Therefore, it is possible to reduce the bulk after the airbag is folded, and the storage performance of the airbag can be improved.
[0036]
【Example】
The following examples further illustrate the present invention. Evaluation in the following examples and comparative examples was performed and displayed by the following method.
[0037]
As a substitute measure of foldability, it was evaluated in two ways. As shown in FIG. 5, the base fabric was folded as shown in FIG. 5, and a load of 400 g was placed at a location 20 mm away from the folding point indicated by X in FIG. It shows that foldability is so favorable that L value is small. In this measurement, the folding point is the center point in the length direction of the test cloth. In Examples 1 and 2, in the case of Reference Example 1 , sampling is performed so that the center point is C part. In this case, the sampling was performed so that the portion B becomes the center point. Moreover, the width | variety of a test cloth shall be 5 cm, and the magnitude | size of the bottom face used the same 5 cm as the width | variety of a test cloth so that load weight might become uniform to the whole width | variety of a test cloth.
[0038]
The other is sampled in the same manner as the test cloth used in the test described above, folded the base cloth, put a load on the folding point, and evaluated with the load when there is no gap between the upper and lower base cloth did. At this time, the smaller the load at the time when there is no gap, the better the folding property. In addition, the load used for this evaluation is the same as the test described above, the bottom length is 5 cm, which is the same as the test cloth width, so that the load weight is even over the entire width of the test cloth. It was used.
[0039]
Further, as an evaluation of the bulkiness of the airbag base fabric, the base fabric is folded in a bellows shape at a warp portion (C portion in FIGS. 1 and 2) that does not have a binding portion at a constant interval parallel to the warp direction. The height when a load of 500 g was put on was evaluated. At this time, the load diameter was 3 cm in accordance with the airbag folding interval. Moreover, in the case of the base fabric which does not have a warp part without a binding part (FIG. 3), it folded in the bellows shape by the same method as the above, and the same space | interval. However, as for the display, the height of Example 1 is set to 100, and other examples and comparative examples are displayed. The smaller this evaluation value is, the more the airbag base fabric is not bulky, and the better the storage of the airbag.
[0040]
The weaving property was evaluated by the number of loom stops per hour. This indicates that the smaller the number of stops, the better the weaving property.
[0041]
Example 1
Using nylon 66 350 dt / 108f for the warp and weft, the density of the bag weave (double part) is 60 / (2.54 cm) × 55 / 2.5.5 cm (warp × weft). A bag-woven airbag base fabric having a configuration shown in FIG. 1 in which the size of the woven portion was 600 mm × 300 mm (warp direction × weft direction) was woven. At this time, the distance a shown in FIG. 1 is 30 mm, the distance b is 30 mm, and the bag weaving part (double part) of C part is composed of four warps as a basic unit. Part (that is, C part is composed of 12 warps). At that time, the ratio of part C warp to the total number of warps was 7.9%. The weaving property in this example was good, and the quality of the obtained base fabric was also good.
[0042]
(Example 2)
A bag-woven airbag base fabric was woven under the same conditions as in Example 1 except that the base fabric configuration of FIG. 2 was used. Further, the ratio of part C was set to 2.8%.
[0043]
(Comparative Example l)
A bag-woven airbag base fabric was woven under the same conditions as in Example 1 except that the base fabric configuration of FIG. 3 was used.
[0044]
( Reference example 1 ) Although it is the same base fabric structure as Example 1, C part consists of 15 units (60 warps), and the warp which has no binding part in any part was about 40% of the total number of warps. .
[0045]
Table 1 shows the results of evaluating the characteristics of each of the bag-woven airbag base fabrics.
[0046]
[Table 1]

As is apparent from Table 1, in the case of Examples 1 and 2, the height at the L value, which is a substitute measure for foldability, is small and the load that eliminates the gap is also small. It can be seen that the foldability is good. Moreover, in the case of Example 1, since the low value is shown also regarding the bulkiness evaluation of an airbag base fabric, the bag-woven airbag base fabric of a present Example is not bulky, and the storing property of an airbag is very good. It becomes.
[0047]
In the case of Example 2, although the bulkiness evaluation is inferior to that of Example 1, it can be said that the air bag is good in terms of folding workability and ease of folding.
[0048]
On the other hand, in the case of the comparative example l created with the configuration of FIG. 3, since the C part existing in the examples 1 and 2 does not exist, the height at the L value which is a substitute measure of folding property is large, Since the load that eliminates the gap is large, it can be seen that the foldability of the bag-woven airbag base fabric is poor. Moreover, in the case of the comparative example 1, since the high value regarding the bulkiness evaluation of an airbag base fabric is also shown, the bag woven airbag base fabric of the comparative example 1 becomes bulky, and the storing property of the airbag becomes poor. .
[0049]
In the case of the reference example 1 , since it has C part like Example 1, 2, the folding workability | operativity of an airbag, the easiness of attaching, etc. are favorable, and the storing property of an airbag is also favorable. However, the number of stops during weaving of the airbag base fabric is large, and the weaving property is poor.
[0050]
【The invention's effect】
The bag woven airbag base fabric of the present invention has a bag portion that does not expand when the airbag is activated (see FIG. 1) at the outer peripheral portion of the connecting single portion (l double portion) formed so as to surround the bag portion (double portion). 1 and 2), this bag portion is preferably present in accordance with the airbag folding interval, so that the folding workability is further improved and folding is easily performed. Folded airbags do not become bulky. As a result, it is excellent in the storage property when storing the airbag in the storage space, and further, the bag woven airbag base fabric that improves the workability of the airbag folding process.
[Brief description of the drawings]
FIG. 1 is a plan view showing an example of a bag-woven airbag base fabric according to the present invention. FIG. 2 is a plan view showing a modification of the bag-woven airbag base fabric according to the present invention. Fig. 4 is a plan view showing an example of a base fabric. Fig. 4 is an enlarged schematic cross-sectional view of a broken line portion in Fig. L. Fig. 5 is an explanatory diagram of an L value evaluation method.
A Bag part (double part)
B Outer part C Double part that does not inflate when air bag is activated D Single part connected

Claims (6)

An airbag base fabric having a bag portion formed by combining fabrics by bag weaving,
At least one of the outer peripheral portion or the inner peripheral portion of the bag portion (double unit) knotting singlet tissue formed so as to surround the (singlet section), have a double portion, not inflated during airbag deployment,
A bag-woven airbag base fabric , wherein the double portion that does not expand when the airbag is operated is provided along a folding interval when the airbag is stored . The bag-woven airbag base fabric according to claim 1 , wherein the double portions that do not expand when the airbag is operated are provided at regular intervals in parallel with the warp direction . The bag-woven airbag base fabric according to claim 1 or 2, wherein the number of the warp yarns of the double part that does not expand when the airbag is operated is 30% or less of the total number of warp yarns . The bag-woven airbag base fabric according to any one of claims 1 to 3, wherein the double-part warp that does not expand when the airbag is operated is organized from 1 to 12 units with four as the basic unit . The bag-woven airbag base fabric according to any one of claims 1 to 4, wherein a width of the connected single tissue (single portion) is 10 mm or more . Bags woven airbag with the airbag base cloth woven bag according to any one of claims 1 to 5.

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