JP4354771B2 - Airbag woven fabric and curtain airbag - Google Patents

Description

  The present invention relates to a bag woven base fabric and a curtain-shaped airbag, and more particularly to a base fabric used in an airbag that is one of safety devices for vehicles such as automobiles. The present invention relates to a bag woven base fabric suitable for use as a curtain-like airbag for side protection.

2. Description of the Related Art In recent years, in vehicles such as automobiles, improvement of passenger safety has been demanded, and the mounting rate of airbags has been improved. The airbag detects the impact that the vehicle receives during a frontal collision and side collision, and flows the gas from the inflator into the inflatable bag, rapidly deploying and inflating the airbag, and cushioning the occupant It is something to protect.
Conventional airbags are often mounted on the front of the driver's seat and passenger's seat, and are often used mainly for protecting the passenger's face and upper body during a frontal collision. Curtain-type airbags that can cope with collisions and vehicle side rolls (hereinafter referred to as rollovers) have been developed.

  This curtain-shaped airbag is housed in a region from the front pillar side to the rear pillar side along the roof rail on the inner side wall of the vehicle, and is designed to inflate and deploy along the side window at the time of collision. It is made to be formed at multiple locations. Curtain-type airbags have excellent storage properties (compact) and the distance between the occupant's head and the side glass is short. It is necessary to enter and protect the head, and a high deployment speed is required. Furthermore, assuming a rollover response, the inner pressure of the airbag does not drop significantly, that is, it is required to maintain an internal pressure of 40 kPa or more for about 8 seconds after deployment, that is, a bag weave that is linked to air leakage or burst. It is strongly desired that there is no defect in the woven structure in the boundary region between the woven fabric and the single woven portion, there is no defect such as yarn fluff on the fabric, and there is no cause of uneven fabric strength such as wrinkles.

  Conventionally, curtain airbags were made by cutting and sewing a plurality of cloths. In this case, in order to prevent air leakage from the sewing needle, a sealing agent is sandwiched between sewing points to obtain further burst resistance. Therefore, since it was necessary to sew with a thick sewing thread, there was a problem that storage performance was lacking and sewing was troublesome. In view of this, it has been proposed to produce a bag-like high-density woven fabric in which the outer periphery of the bag woven portion is closed by a single woven portion and use it in an airbag (see, for example, Patent Document 1). However, the width of the single woven portion is set wide in order to maintain the expanded state of the bag woven portion, but the crimp rate of the yarn in the single woven portion is larger than the crimp rate of the yarn in the double woven portion, and the woven fabric Since the cover factor is also large, wrinkles, fluff and the like occur in the boundary region between the double bag weave and the single weave, and there is a problem that air leakage cannot be suppressed for several seconds during expansion and deployment. In particular, there is a problem that wrinkles are likely to occur due to heat and tension received when the surface is coated with silicone resin, urethane resin or the like for processing into an airbag.

In addition, a method has been proposed in which the outer periphery of a circular double bag weave is surrounded by a single weave composed of two types of woven structures to form a joining band and increase the strength of the joining part (see, for example, Patent Documents 2 and 3). ). However, although the strength of the joint portion itself is improved by configuring the circular joint band with a plurality of woven structures, there is still a problem that air leakage from the boundary region between the double bag woven portion and the single woven portion cannot be prevented. .
Furthermore, a method has been proposed in which the outer periphery of a circular double bag weave is surrounded by two single woven portions to form a joining band, thereby increasing the strength of the joining portion (for example, see Patent Document 4). However, there is no specific description of the woven structure of the single woven part, the width of the single woven part is still large, and problems such as generation of yarn fluff and wrinkling during coating processing are improved when weaving for curtain airbags It has not been. In addition, a method for reducing misalignment by forming a plurality of single weave portions with a diagonal structure on the outer periphery of a double bag weave has been proposed (see, for example, Patent Document 5). However, since the weaving structure of the single weaving part is only a 2/2 diagonal structure, and the influence of the fineness of the yarn used is not considered at all, a 2/2 diagonal structure having a large burden on the yarn having a woven structure is required. When a plurality of lines are juxtaposed, wrinkles occur in the boundary region between the double bag weave and the single weave, which is bulky and inferior in storage property, and inferior in air leakage resistance due to coating spots caused by wrinkles. .

As described above, an air bag woven base fabric that suppresses the generation of fluff and wrinkles and has improved weaving properties and air leakage resistance has not yet been obtained.
JP-A-1-254446 Japanese Patent Laid-Open No. 3-16852 JP-A-4-193646 Japanese Patent Laid-Open No. 3-16850 Special table 2003-510469 gazette

  The object of the present invention is to solve the above-mentioned problems of the prior art, enable high-speed deployment, extremely little air leakage, and since there is little tension load applied to the warp during weaving, there is no occurrence of warp fluff, and further coating processing An object of the present invention is to provide a bag woven base fabric and a curtain-like airbag for an air bag having a very low crease generation at the boundary region between the double woven portion and the single woven portion at the time, and having good fabric quality.

In view of the above problems, the present inventors have conducted intensive studies on the woven structure of the joint band formed on the outer periphery of the double bag weaving portion that can be expanded and inflated, the combination of the types, and the width of the single weaving portion. The above problem is achieved by forming, on the outer periphery of the airbag, a joining band in which a single woven portion made of a diagonal structure characterized by the relationship between the yarn fineness, the woven density, and the number of yarns is arranged in parallel via the double bag woven portion. The present invention has been found.
That is, the invention claimed in the present application is as follows.

(1) An airbag bag base fabric having a double bag weaving portion that can be expanded and inflated and a joining band formed on the outer periphery thereof, and the joining band is arranged in parallel via the double bag weaving portion It has a single weave portion that satisfies the following formula, and the single weave portion consists of a 2/2 oblique structure and a 3/3 oblique structure, and the 2/2 oblique structure can expand and expand. An air bag woven base fabric, characterized in that the woven fabric is disposed on the outer side of the double woven portion and the 3/3 diagonal structure is disposed on the outer periphery thereof .
1000 ≦ K × N × W ² / D ≦ 3000
[Where W is the yarn fineness (dtex), D is the weaving density (lines / 2.54 cm), N is the number of yarns in the single woven portion (lines), and K is a coefficient expressed by 1 / √p (p Means p / p angle structure). ]
(2) the warp and weft constituting the air bag for hollow weave fabric, hollow weave fabric for an air bag according to both the total fineness is characterized in that it consists of synthetic fibers in the range of 100～400Dtex (1) .
(3) the air bag for hollow weave fabric is characterized by having a surface coating layer of 10~140g / m ² (1) or hollow weave fabric for an air bag according to (2).
( 4 ) The airbag woven base fabric according to any one of (1) to ( 3 ), wherein the airbag woven base fabric has an air permeability of 0.5 cm ³ / cm ² · s or less. cloth.
( 5 ) The warp and weft constituting the airbag woven base fabric are both made of nylon 66 fibers having a single yarn fineness in the range of 0.5 to 4.5 dtex (1) to ( 4 ) A bag-woven base fabric for airbags according to any one of the above.
( 6 ) A curtain-type airbag using the airbag woven base fabric according to any one of (1) to ( 5 ).

  According to the airbag woven base fabric of the present invention, since the single woven portions satisfying the predetermined relationship among the yarn fineness, the woven density, and the number of yarns are arranged in parallel through the double woven portions in the joining band, Side curtain-like air with excellent internal pressure retention as a base fabric for bags, no warp and fluff in the production machine during base fabric manufacture, excellent weaving, and no wrinkling during processing A base fabric for a bag can be provided. Further, it is possible to provide a curtain-like airbag that can be deployed at high speed by making use of the characteristics of a lightweight thin fabric by using a relatively fine yarn, has excellent storage properties, and has little impact on people.

Hereinafter, the present invention will be described in detail.
The airbag woven base fabric of the present invention has a double woven portion that can be expanded and inflated, and a joining band formed on the outer periphery thereof.
FIG. 2 is an explanatory view of a bag woven base fabric for an embodiment of the present invention. In FIG. 2, the bag fabric airbag base fabric 1 includes a double bag weaving portion 3 having a fluid introducing portion 5 and a deployable double bag weaving portion 3, a joining band 2 provided on the outer periphery of the double bag weaving portion 3, and And a partial nodule portion 6 provided on the outer periphery, and fluid is introduced from the fluid introduction portion 5 to the double bag weaving portion that can be expanded and inflated when the vehicle collides, and the double bag weaving portion 3 expands and expands to occupant Protect. The joining band 2 is shown in FIG. 1 as an enlarged explanatory view of the A part of FIG. 2, but the single weaving part 4 composed of an oblique structure in which the yarn fineness, the weaving density, and the number of yarns satisfy a predetermined relationship, They are arranged in parallel via a double bag weave part (partial knot part) 7.

  There are no particular limitations on the material of the warp and weft used for the bag weave base fabric of the present invention. For example, nylon 66, nylon 6, nylon 46, nylon 610, nylon 612, etc., alone or their copolymerization and mixing Polyamide fiber, polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, etc. obtained by the above or a copolymer thereof, polyester fiber obtained by mixing, paraphenylene terephthalamide or this and an aromatic ether Fluorine including aramid fiber, wholly aromatic polyester fiber, vinylon fiber, polyolefin fiber such as ultrahigh molecular weight polyethylene, vinyl chloride and vinylidene chloride fibers, polytetrafluoroethylene Fiber, polysulfone fiber, polyphenylene sulfide fiber (PPS), polyether ketone fiber (PEEK) fiber, polyimide fiber, polyetherimide fiber, cellulosic fiber including high strength rayon, acrylic fiber, carbon fiber, glass fiber, Silicon carbide fiber (Sic) fiber, alumina fiber, or the like is used. Of these, synthetic fibers are preferable from the viewpoint of strength and economy, and polyester fibers and polyamide fibers (nylon 6, nylon 66) are particularly preferable.

These fiber yarns may contain various additives in order to improve process passability in the raw yarn manufacturing process and the post-processing process. For example, heat stabilizer, light stabilizer, anti-aging agent, antioxidant, lubricant, smoothing agent, pigment, water repellent, oil repellent, concealing agent such as titanium oxide, gloss imparting agent, flame retardant, plasticizer, One or a combination of two or more antistatic agents and thickeners can be used. Moreover, you may use what gave processes, such as twisting, a bulky process, a crimping process, and a winding process, as needed.
The total fineness of the warp and weft used for the airbag bag base fabric is preferably 100 to 400 dtex, more preferably 160 to 250 dtex. When the total fineness is within this range, the air bag can withstand the strength during expansion and expansion, the base fabric becomes flexible, the storage property is improved, and high-speed deployment is possible. If the total fineness is less than 100 dtex, the mechanical strength at the time of deployment is insufficient, and a burst phenomenon is likely to occur. If the total fineness exceeds 400 dtex, warp fluffs are likely to occur frequently during weaving, and weaving and product storage Inferior, the speed during deployment tends to be slow.
The single yarn fineness of the warp and weft is preferably 0.5 to 4.5 dtex. The shape of the single yarn cross section of the warp and the weft is not particularly limited, and may be any of a round cross section, an irregular cross section such as a triangle, and the like, but a round cross section is preferable from the viewpoint of maximizing strength.

Further, the density of the bag woven base fabric for the airbag is preferably such that the cover factor in each yarn direction is 1900 to 2500 for both the warp and the weft. The cover factor can be expressed by the following formula.
Cover factor in the warp direction = (number of warps per 2.54 cm) x √ (total warp fineness)
Cover factor in the weft direction = (number of wefts per 2.54 cm) x √ (total weft fineness)
For example, when the number of warps per 2.54 cm is 142 and the total fineness of the warp is 235 dtex, the cover factor in the warp direction is 2177.

The deployable and inflatable double bag weave constituting the airbag fabric base fabric has an upper fabric and a lower fabric which are inflated by introducing a fluid, and each is usually woven with a plain structure. A joining band is formed on the outer periphery of the double bag weaving portion that can be expanded and inflated, and a single weaving portion made of a predetermined oblique structure is arranged in parallel via the double bag weaving portion. The diagonal structure is a structure in which a specific number of warp and weft ups and downs are used as a basic unit and developed vertically and horizontally, and is also called a mat structure or a basket structure.
By making the single weave portion formed in the joining band into an oblique structure, the load on the structure of the oblique structure can be received by a plurality of yarns, so that the force applied to one yarn is weakened, thread breakage, misalignment, etc. It is possible to reduce factors that affect air leakage. The angle structure is preferably a 2/2 angle structure or a 3/3 angle structure. In the case of a large oblique structure, the number of floating yarns increases, the degree of freedom of yarns is large, and yarn misalignment is likely to occur, and air leakage is likely to occur. When the number of tilt structures is 5 or more, the number of floating yarns is large and air leakage is likely to occur. In addition, a structure in which the same number of warps and wefts ascend and sink as in the case of a p / p skewer is preferable because the airbag shape can be easily designed.

In the present invention, the oblique structure needs to satisfy the following formula: 1000 ≦ K × N × W ² / D ≦ 3000. Here, W is the yarn fineness (dtex), D is the weave density (lines / 2.54 cm), N is the number of yarns in the single woven portion (lines), and K is a coefficient represented by 1 / √p (p is p / p For example, K in the case of a 2/2 oblique structure is 0.707, and in the case of a 3/3 oblique structure, K is 0.577.
If the value of the above formula is less than 1000, for example, the width of the single woven portion is narrow, the yarn fineness is reduced, or the warp density and the weft density in the woven fabric are increased. The air leakage resistance is reduced. In addition, when the value of the above formula exceeds 3000, for example, the yarn fineness is large and the number of yarns is large. In such a case, wrinkles occur in the boundary region between the double bag weave portion and the single weave portion, and weaving Due to the occurrence of warp fluff over time, the quality of the airbag deteriorates. By selecting the yarn fineness, the weave density, and the number of yarns of the single woven portion within a range that conforms to the above formula, the width of the single woven portion can be made a suitable range.

Moreover, the single weave part which consists of the said diagonal structure | tissue needs to be arrange | positioned in parallel via the double bag weave part. In this case, the double bag weave portion can be composed of a double bag weave structure or a partial nodule structure.
When the fluid is introduced and the double bag weave expands, air enters the bag, the flat bag fabric becomes three-dimensional and the fabric is lifted up, and the bag fabric becomes an overall small shape. At the time of maximum expansion, the boundary between the double woven part and the single woven part is stretched in the direction of 90 degrees (each part of the double sack tissue part is stretched in the direction of 180 degrees), and the single woven part is instantaneously moved to the bag side. At this time, particularly at the curved portion, it receives compression and tension. As in the present invention, in the joining band, the presence of the double bag weave portion between the two single weave portions can absorb compression and tension when fluid is introduced into the bag portion due to its flexibility. it can. When only one single woven portion is formed in the joining band, the strength of the joining portion is low, and air leakage and burst are likely to occur. The number of single weaving parts arranged in parallel with the double bag weaving part may be two or more, but in the case of four or more, the width of the joining band is likely to be wide, and it is inferior in high-speed deployability. Wrinkles are likely to occur, and the quality of the fabric tends to deteriorate.

In the present invention, the width of the single woven portion formed in the joining band depends on the fineness and woven density of the yarn used, but is preferably 10 mm or less, more preferably from the viewpoint of air leakage resistance and wrinkle generation. 0.5 to 3 mm.
In a conventional sewing type airbag, there is an idea that a thicker joining band is more effective for air leakage resistance. Even in the case of a bag-woven airbag, the width of the single woven portion of the joining band is set to 15 mm or more. In general, when the length is less than 10 mm, the air leakage resistance is lowered, so that the width of the single woven portion cannot be made 10 mm or less.
In the present invention, two single weaving portions having a predetermined relationship between the yarn fineness, the weaving density, and the number of yarns are formed, and a double bag weaving portion is provided between them, thereby reducing the width of one single weaving portion to 10 mm or less. As a result, the boundary region between the double woven portion and the single woven portion can be kept flat and the coating surface can be made uniform, so that excellent air leakage resistance and wrinkle generation prevention can be obtained. Can do.

  In the present invention, the joining band has a single weave portion composed of a 2/2 oblique structure and a 3/3 oblique structure, and the 2/2 oblique structure is arranged on the side of the double bag weaving portion that can be expanded and inflated, It is preferable that the 3/3 oblique structure is disposed on the outer periphery of the 2/2 oblique structure. If the single weave is a 2/2 diagonal structure, the fineness of warp and weft is 235 dtex, and the weave density is 146 / 2.54 cm for both the weft, the number of yarns is a multiple of 2 from 4 to 10. It is possible to configure with any number, and each can be selected from the storage capacity and the required strength. In addition, in the case where one single woven portion constituting the oblique structure is a 3/3 oblique structure, the number of yarns can be constituted by an arbitrary number that is a multiple of 3 from 6 to 12. It is. The structure between the two single woven parts can be composed of any number from 2 to 32, basically a multiple of 2, and a double bag weave is suitable. When the joint zone is a curved portion, the number of 2/2 iterative structures may be increased or decreased within a range of 2 to 8, and the number of 3/3 iterative structures may be 3 What is necessary is just to form a structure | tissue so that it may increase / decrease by the number within 2 to 8 in order to increase / decrease in the range of -12, and to have continuity.

When producing a woven fabric used for a bag woven base fabric for an airbag using a loom, if the joining band is continuous in the warp direction, the warp behind the warp tends to be more tensioned than the other warps. This is because the amount of warp of the single weave part and the bag part or the partial knot part is different, and when the joining band is continuous in the warp direction, the other part of the warp part has the same amount of bite. A method can be used in which a single woven portion is formed at a location other than the base fabric used for the tissue airbag of the woven portion or at a location other than the bag portion (expanded) to relieve the warp tension.
The warp used for the air bag woven base fabric is not restricted by non-glue yarn or glued yarn. Further, it is preferable that the interlace process has entanglement in the range of 10 to 40 pieces / m, more preferably entanglement in the range of 20 to 35 pieces / m. The warp may be used after adding a twist of 300 T / m or less, preferably 50 to 100 T / m. Further, smoothness and convergence may be imparted to the yarn by simple oiling and waxing during aging, and gluing using an acrylic glue or a silicone agent may be performed. In this case, an adhesive amount of 0.5 to 3% owf is preferable. The weft may be the same as the warp, and may be less entangled than the warp.

  For example, a loom such as an air jet loom, a rapier room, a projectile room, or a multiphase loom is used for production of the bag woven base fabric of the present invention, but the invention is not limited thereto. Since the bag-woven base fabric for airbags is a high-density woven fabric, it is necessary to stabilize the pre-weaving when weaving, and it is preferable to use a full-surface temple, and the full-surface temple bar is provided with irregularities and grooves. Suppressing the movement of the fabric is also effective for the stability before weaving. Moreover, you may correct | amend the sagging of a cloth using a yarn increase at the both ends of a textile fabric. A jacquard device, a dobby device, or the like is used as a machine that controls the raising and lowering of the warp yarn. The number of jacquard is not particularly limited, but an electronic jacquard with a large number of 2,000 to 14,000 is preferable because it can accurately handle design creation of a complicated shape.

In addition, when commercializing the airbag bag base fabric of the present invention as an airbag, coating agents such as silicone resin and polyurethane resin are coated on both sides of the fabric to reduce air permeability, prevent misalignment, and prevent bursts. It is preferable to do. Although the coating amount is thinner has excellent storability, considering the properties such as anti-air leakage property, preferably in the range of 10~140g / m ^2, more preferably from 20 to 100 g / m ^2. By using the bag weave base fabric of the present invention, it is possible to suppress the formation of wrinkles between the double bag weave part and the joining band part at the time of coating, and it has excellent air leakage resistance after coating. A base fabric can be obtained.
The air bag woven base fabric of the present invention preferably has an air permeability of 0.5 cm ³ / cm ² · s or less. If it exceeds 0.5 cm ³ / cm ² · s, the internal pressure holding performance necessary for a curtain airbag may not be satisfied. Here, the air permeability indicates a value measured by JIS L1096 8.27.1 A method (Fragile method).

Hereinafter, the present invention will be specifically described by way of examples. In addition, the measurement, evaluation, etc. in the examples were performed as follows.
1) Internal pressure retention The base fabric for a bag-woven airbag having the shape shown in FIG. 2 in which the joining band on the outer periphery of the bag portion is composed of various tissues is connected to the front end of a tank having an internal pressure of 70 kPa and a capacity of 300 L via a metal tube. The valve was opened instantaneously using a solenoid valve, and then the change in the internal pressure of the bag-woven airbag was examined with a pressure sensor attached to the tube on the bag-woven airbag side. The case where the internal pressure retention after 8 seconds is 50% or more of the initial value is regarded as acceptable. The number of measurements is 10, and there is a problem when the minimum internal pressure retention rate does not exceed 50% even at one point.
2) Air permeability Measured by JIS L1096 8.27.1 A method (Fragile type method).
3) Wrinkles of raw machinery and wrinkles of processed fabric By five inspectors with more than 5 years experience in producing fabrics while weaving the woven fabric (raw machinery) on the inspection machine and winding it at a speed of 10 m / min, The warp of the raw machine and the degree of wrinkles on the processed fabric were examined. For warp fluff, the number of warp fluffs recognized by 3 or more of the 5 people is noted, and there is a problem when there are 5 or more per 100 m. Similarly, the wrinkles were also inspected by the above-mentioned five persons while taking up the processing warp with a sheet inspection machine. 5 grades are averaged, and grade 3 or higher is accepted, and the judgment of processing anti-grade is grade 5: no wrinkle between the single part on the fabric and the bag part, level 4: the wrinkle is visible slightly, but slight 3rd grade: Wrinkles are visible, 2nd grade: wrinkles are visible and unevenness of the coat can be seen, 1st grade: Wrinkles are present and the unevenness of the coat is clearly known.
4) Concavities and convexities on the processed surface The thickness of the double woven portion and the single woven portion of the coated processed surface was measured with a surface roughness meter. The needle of the surface roughness meter moves the needle from the double bag weaving portion to the joined body so that the single weaving portion is positioned in a direction perpendicular to the traveling direction of the needle. That is, it is moved 5 mm at the double bag weave, and then moved to the joining band side. At this time, the thickness average of the double woven portion and the average thickness of the single woven portion in the joining band were measured, and the difference (δ) in the thickness between the double woven portion and the single woven portion was determined as the thickness (d) of the double woven portion. The value δ / d divided by 50 was measured 50 times at different locations, and when the average value thereof was 0.1 or more, it was determined that there was unevenness. In addition, when there are two single woven portions in the joining band, the thicknesses of both are measured.

[Example 1]
A nylon 66 fiber with a total fineness of 235 dtex and a single yarn fineness of 3.3 dtex is used for the warp and weft, and the electronic jacquard device and rapier room are used to produce the design machine shown in FIG. 2, followed by the set-coating process, A processing bag of double bag weave having a density of 146 pieces / 2.54 cm and a weft density of 146 pieces / 2.54 cm was obtained. As for the structure of the joining band, the first (inner side) single weaving portion as viewed from the double bag weaving portion side uses a 6/2 number of yarns to form a 2/2 diagonal structure (see Fig. 3), and then the number of 4 yarns. To form a double bag weave (see FIG. 4), and the second (outer) single weave has a 3/3 diagonal structure (see FIG. 5) using 6 yarns.
The value of K × N × W ² / D singlet Obe inside the processing reaction at this time is 1605, the value of K × N × W ² / D of the outer single Oribe was 1310. The weaving was woven 300 m at a speed of 450 rpm, and the coating was finished by applying a silicone resin in an amount of 80 g / m ² per side with a comma coater.
The properties of the resulting woven fabric are shown in Table 1. The base fabric has excellent internal pressure retention, no warp fluff, little wrinkles, small irregularities at the boundary between the bag part and the joining band, and excellent quality. I found out that

[Example 2]
In Example 1, a single weaving portion inside the joining band is formed into a 2/2 oblique structure using four yarns, and then a double bag weaving portion is prepared by providing four yarns, followed by an outer single weaving portion. Is a double bag having a warp density of 146 pieces / 2.54 cm and a weft density of 146 pieces / 2.54 cm, except that the number of yarns is set to 3/3 diagonal structure using 6 yarns. We got a processing weave of weaving. The value of K × N × W ² / D singlet Obe inside the processing reaction at this time is 1070, the value of K × N × W ² / D of the outer single Oribe was 1310.
The properties of the resulting woven fabric are shown in Table 1. The base fabric has excellent internal pressure retention, no warp fluff, little wrinkles, small irregularities at the boundary between the bag part and the joining band, and excellent quality. I found out that

[Example 3]
In Example 1, the single weaving portion inside the joining band is formed into a 2/2 oblique structure using ten yarns, and then a double bag weaving portion is prepared by providing four yarns, followed by the outer single weaving portion. Is a double bag with a warp density of 146 pieces / 2.54 cm and a weft density of 146 pieces / 2.54 cm, except that the number of yarns is 9 and a 3/3 diagonal structure is used. We got a processing weave of weaving. The value of K × N × W ² / D singlet Obe inside the processing reaction at this time is 2674, the value of K × N × W ² / D of the outer single Oribe was 2619.
The properties of the resulting woven fabric are shown in Table 1. The base fabric has excellent internal pressure retention, no warp fluff, little wrinkles, small irregularities at the boundary between the bag part and the joining band, and excellent quality. I found out that

[Comparative Example 1]
In Example 1, the single weaving portion inside the joining band is formed into a 2/2 oblique structure using two yarns, and then a double bag weaving portion is prepared by providing four yarns, followed by the inner single weaving portion Is a double bag having a warp density of 146 pieces / 2.54 cm and a weft density of 146 pieces / 2.54 cm, except that the number of yarns is 3 to form a 3/3 diagonal structure. We got a processing weave of weaving. The value of K × N × W ² / D singlet Obe inside the processing reaction in this case is 535, the value of K × N × W ² / D of the outer single Oribe was 655.
The properties of the resulting woven fabric are shown in Table 1, but it is found that there is no warp fluff, no wrinkles, and a base fabric with small irregularities at the boundary between the bag portion and the joining band, but the internal pressure retention is low. It was.

[Comparative Example 2]
In Example 1, the single weaving portion inside the joining band is made into a 2/2 diagonal structure using 16 yarns, and then the double bag weaving is prepared by providing four yarns, followed by the outer single weaving portion Is a double bag with a warp density of 146 pieces / 2.54 cm and a weft density of 146 pieces / 2.54 cm, except that 15 is used to form a 3/3 diagonal structure. We got a processing weave of weaving. The value of K × N × W ² / D singlet Obe inside the processing reaction at this time is 4279, the value of K × N × W ² / D of the outer single Oribe was 3273.
The properties of the resulting woven fabric are shown in Table 1, but the internal pressure retention rate is poor, warp fluffs frequently occur, wrinkles are generated, the unevenness at the boundary between the bag part and the joining band is large, and the low-quality base fabric Met.

[Comparative Example 3]
In Example 1, the warp density was 146/2... In the same manner as in Example 1 except that the joining band was structured by one single woven portion and a 2/2 oblique structure was formed using 16 yarns. A processing bag of a double bag weaving of 54 cm and a weft density of 146 pieces / 2.54 cm was obtained. At this time, the value of K × N × W ² / D of the single weave portion in the processed fabric was 4279.
The properties of the obtained woven fabric are shown in Table 1. The internal pressure retention rate was poor, warp fuzz and wrinkles were generated, the irregularities at the boundary between the bag portion and the joining band were large, and the fabric was of low quality.

[Comparative Example 4]
In Example 1, the warp density was 146/2... In the same manner as in Example 1 except that the joining band was structured by one single woven portion and a 3/3 diagonal structure was formed using 15 yarns. A processing bag of a double bag weaving of 54 cm and a weft density of 146 pieces / 2.54 cm was obtained. At this time, the value of K × N × W ² / D of the single weave portion in the processed fabric was 3273.
The properties of the obtained woven fabric are shown in Table 1. The internal pressure retention rate was poor, warp fluff was frequently generated, wrinkles were generated, and the fabric was of low quality.

[Example 4]
A nylon 66 fiber with a total fineness of 350 dtex and a single yarn fineness of 4.9 dtex is used for the warp and weft, and the design shown in FIG. 2 is produced using an electronic jacquard device and rapier room, followed by a set-coat process, A processing bag of double bag weave having a density of 118 yarns / 2.54 cm and a weft density of 118 yarns / 2.54 cm was obtained. As for the structure of the joint band, the first (inner side) single weaving portion as seen from the bag side has a 2/2 diagonal structure using four yarns, then four yarns are provided to form a double bag weaving portion. The second weave (outer side) single woven portion was made into a 3/3 diagonal structure using three yarns. The value of K × N × W ² / D singlet Obe inside the processing reaction at this time is 2936, the value of K × N × W ² / D of the outer single Oribe was 2202.
The weaving was woven 300 m at a speed of 450 rpm, and the coating was finished by applying a silicone resin in an amount of 80 g / m ² per side with a comma coater.
The properties of the resulting woven fabric are shown in Table 1. The base fabric has excellent internal pressure retention, no warp fluff, little wrinkles, small irregularities at the boundary between the bag part and the joining band, and excellent quality. Met.

[Example 5]
A nylon 66 fiber with a total fineness of 155 dtex and a single yarn fineness of 2.8 dtex is used for the warp and weft, and the design shown in FIG. 2 is produced using an electronic jacquard device and rapier room, followed by a set-coat process, A processing bag of a double bag weave having a density of 170 / 2.54 cm and a weft density of 170 / 2.54 cm was obtained. As for the structure of the joining band, the first (inner side) single weaving portion as seen from the bag side is made into a 2/2 diagonal structure using 12 yarns, and then the bag portion is prepared by providing 4 yarns. Then, the second (outer) single woven portion was formed into a 3/3 diagonal structure using 15 yarns. At this time, the value of K × N × W ² / D of the inner singlet Obe in the processing reaction is 1199, the value of K × N × W ² / D of the outer single Oribe was 1223.
The weaving was woven 300 m at a speed of 450 rpm, and the coating was finished by applying a silicone resin in an amount of 80 g / m ² per side with a comma coater.
The properties of the resulting woven fabric are shown in Table 1. It has excellent internal pressure retention, no warp fluff, little wrinkles, small irregularities between the bag part, joining band and boundary, and excellent quality. Met.

[Comparative Example 5]
A nylon 66 fiber having a total fineness of 470 dtex and a single yarn fineness of 6.5 dtex is used for the warp and weft, and the design shown in FIG. 2 is produced using an electronic jacquard apparatus and rapier room, followed by a set-coat process, A processing bag of double bag weave having a density of 102 / 2.54 cm and a weft density of 102 / 2.54 cm was obtained. As for the structure of the bonding band, the first (inner side) single weaving portion as seen from the bag side is made into a 2/2 diagonal structure using two yarns, and then four yarns are provided to produce the bag portion. Subsequently, the second (outside) single woven portion was formed into a 3/3 diagonal structure using three yarns. The value of K × N × W ² / D singlet Obe inside the processing reaction at this time is 3062, the value of K × N × W ² / D of the outer single Oribe was 3749.
The weaving was woven 300 m at a speed of 450 rpm, and the coating was finished by applying a silicone resin in an amount of 80 g / m ² per side with a comma coater.
The properties of the obtained woven fabric are shown in Table 1. The internal pressure retention was low, wrinkles were generated, and the fabric was of low quality.

[Comparative Example 6]
A nylon 66 fiber with a total fineness of 80 dtex and a single yarn fineness of 3.3 dtex is used for the warp and weft, and the design shown in FIG. 2 is produced using an electronic jacquard apparatus and rapier room, followed by a set-coat process, A processing bag of double bag weave having a density of 240 / 2.54 cm and a weft density of 240 / 2.54 cm was obtained. As for the structure of the bonding band, the first (inner side) single weave as seen from the bag side is made into a 2/2 oblique structure using 20 yarns, and then the bag is made by providing 4 yarns. Subsequently, the second (outside) single woven portion was made into a 3/3 diagonal structure using 18 yarns. The value of K × N × W ² / D singlet Obe inside the processing reaction in this case is 377, the value of K × N × W ² / D of the outer single Oribe was 277.
The weaving was woven 300 m at a speed of 450 rpm, and the coating was finished by applying a silicone resin in an amount of 80 g / m ² per side with a comma coater.
The characteristics of the obtained woven fabric are shown in Table 1, and it was a low-quality base fabric with a low internal pressure retention rate.

  According to the present invention, the air bag base fabric has excellent internal pressure retention, no generation of warp warp during production of the base fabric, no generation of wrinkles during processing, and good quality bag weaving base Can provide cloth. In particular, this airbag woven base fabric can be suitably used for a curtain-type airbag that protects the human body from the side.

Explanatory drawing of the joining belt | band | zone provided in the bag-woven base fabric for airbags which shows one Example of this invention. BRIEF DESCRIPTION OF THE DRAWINGS Schematic explanatory drawing of the bag woven base fabric which shows one Example of this invention. Fig. 2 is a woven structure diagram of a 2/2 oblique structure. The woven organization chart of a double bag weaving part. Fig. 3 is a woven structure diagram of a 3/3 diagonal structure.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Base fabric for bag-woven airbags, 2 ... Joining band, 3 ... Double bag weaving part which can be expand | deployed, 4 ... Single weaving part, 5 ... Fluid introduction part, 6 ... Partial knot part, 7 ... Double bag weaving part.

Claims (6)

A bag woven base fabric for an airbag having a double bag weaving portion that can be expanded and inflated and a joining band formed on the outer periphery thereof, wherein the joining band has the following formula arranged in parallel via the double bag weaving portion A single weave portion comprising a satisfactory oblique structure, and the single weave portion comprises a 2/2 oblique structure and a 3/3 oblique structure, wherein the 2/2 oblique structure is capable of expanding and expanding; A bag woven base fabric for an airbag, characterized in that the woven fabric is disposed on the side of the bag woven portion and the 3/3 diagonal structure is arranged on the outer periphery thereof .
1000 ≦ K × N × W ² / D ≦ 3000
[Where W is the yarn fineness (dtex), D is the weaving density (lines / 2.54 cm), N is the number of yarns in the single woven portion (lines), and K is a coefficient expressed by 1 / √p (p Means p / p angle structure). ] 2. The airbag woven base fabric according to claim 1 , wherein the warp and weft constituting the airbag woven base fabric are made of synthetic fibers having a total fineness in the range of 100 to 400 dtex. 3. The air bag for hollow weave fabric, hollow weave fabric for an air bag according to claim 1 or 2, characterized in that it has a surface coating layer of 10~140g / m ^2. The airbag woven base fabric according to any one of claims 1 to 3 , wherein the airbag woven fabric has an air permeability of 0.5 cm ³ / cm ² · s or less. Warp and weft constituting the hollow weave fabric for the air bag, both to any one of claims 1 to 4, a single yarn fineness is characterized in that it consists of nylon 66 fibers in the range of 0.5~4.5dtex The bag-woven base fabric for air bags described. A curtain-like airbag using the airbag woven base fabric according to any one of claims 1 to 5 .

Images