KR100613268B1 - Inflatable two-layer fabrics - Google Patents

Abstract

The present invention relates to a double fabric having parts in the base. In particular, the fabric having a part of the present invention (Fig. 4) is a mirror image around the intersection of the two separate weaving fabric layer weaving at the same time using a loom and the texture of the two fabric layers joined together It is a double woven fabric coated with synthetic resin, and fabricated with a structure that can omit the sewing process in the weaving stage. The manufacturing cost is drastically lowered. In particular, the jacquard is made because all the fabric layers are plain weave. It is possible to manufacture various types of air bags using and has excellent weaving and smoothness, so it is suitable for shock-absorbing products such as curtain type airbags on the side of automobiles.

Airbag, Double Fabric, Wetted Parts, Component

Description

Double fabric with parts in the aircraft {INFLATABLE TWO-LAYER FABRICS}

1 is a complete organizational chart (a) and an expanded pattern (b) with two separate plain weave planes composed of double weaves.

2 is a junction C generated when the mirror image of the plain weave intersects.

3 is a mirror image of the plain weave (a) and (b).

Figure 4 is a cross-section of the fabric having a part according to an embodiment of the present invention inflated by air or the like.

[TECHNICAL FIELD OF THE INVENTION]

The present invention relates to a double fabric having a part in the body, in particular a double fabric having excellent utility in airbags or life jackets, the two separate weaving layer and the two fabric layers are woven at the same time using a loom The present invention relates to a double fabric coated with a synthetic resin of a fabric prepared by tangling the tangled tangled tissue while forming a mirror image around the intersection.

Fabrics with component parts by air, such as air, have a junction point between two separate layers of fabric and two layers of fabric. A fabric having a system closed by a junction point serves to firmly bind the two layers when each single layer expands rapidly by air or the like, and there should be no outflow of gas in the portion where the two layers follow.

Fabrics with parts can also be used for automotive airbags, life jackets, and the like. In particular, when the vehicle rolls over and rolls, a side curtain-type airbag is deployed in which a curtain-type airbag is deployed at the side window of the vehicle in order to prevent the driver or passenger's head from being injured by the window or side structure of the vehicle. In this regard, in order to protect passengers safely in an accident, the airbag must be inflated for at least five seconds while the car is rolling, in which case a fabric with parts is useful.

The method for producing a partary fabric by gas includes a method of sewing two fabrics, a method of fusion by heat or ultrasonic waves, or a method of bonding by an adhesive.

In the method of sewing or fusion or adhesion, the process is lengthened and the cost is high by using a separate sewing or fusion or adhesion method after manufacturing the fabric constituting the first two layers.

In addition, the weaving method of the part-like fabric is a method of forming a contact point during the weaving of the fabric (US Patent No. 6,220,309, US Patent 5,098,125, US Patent 5,011,183, US Patent 5,603,647).

Among them, U.S. Patent No. 6,220,309 describes a double woven fabric in which the expanded layer is plain weave, and the woven fabric is 2/2 basket woven. In U.S. Patent No. 5,098,125 and U.S. Patent 5,011,183, the expanded layer is plain weave, (2/2 basket or 3/3 basket) + (1/2 twill or 1/3 twill) + (5 sellers) for a double weave, US Patent No. 5,603,647 has an expanded layer of plain weave or basket or twill It is written for double weave with 3/3 basket weaving, but when 3/3 basket weaving or 2/2 basket weaving is used alone, two layers separated by the gas are There is a problem that outflow of gas occurs.

In order to solve the problems of the prior art, the present invention can manufacture the fabric in a structure that can omit the sewing process in the weaving step, thereby significantly lowering the manufacturing cost, dense the texture of the connection part It is strong because the air breathability of the joint can be significantly lowered, and it is possible to manufacture various types of air pockets using jacquard by using the fabric layer where all the fabric layers are plain weave. It aims to provide.

In addition, an object of the present invention is to provide a side curtain type airbag for protecting a vehicle passenger including a double fabric having parts of the gas.

In order to achieve the above object, the present invention

A fabric coated with a synthetic resin of a fabric produced by stitching two separate plain weaving layers that are woven at the same time using a weaving machine and the stitching tissue that joins the two fabric layers while forming a mirror image around the intersection.

(1) The thickness of one fabric surface measured by ASTM D 1777 method is 0.5 mm or less,

(2) the value of the stiffness measured by ASTM D 4032 circular band method is 3.5 Kgf or less;

(3) When the internal pressure is measured 5 seconds after the gas is applied at an initial pressure of 50 KPa, it is 6 KPa or more.

(4) When the joint strength is measured by the bark strength according to ASTM D 5822 method, it is 80 Kg / in or more and the cut elongation is less than 60%.

(5) The strength retention rate is 80% or more in the coating section wear test measured by ASTM D 4157.

It provides a double fabric having part properties of a gas having properties.

The present invention also provides a side curtain type airbag for automobile passenger protection comprising a double fabric having a part of the gas.

Hereinafter, the present invention will be described in detail.

In the present invention, a double fabric having a component part is formed by joining two fabric layers separated by two woven fabric layers (A or B in FIGS. 2 and 4) separated on a weaving machine using a jacquard. It is produced by coating a synthetic resin after fabricating the fabric by forming a mirror image around the intersection point of the bonding portion (C). At this time, in order to further solidify the contact point, the contact point crossing in the mirror image may be repeated two or more times. In this case, it is better to prevent air from escaping into the pocket.

The fabric layer of the present invention is intended primarily for the part-by-gas component, and the joining portion prevents the gas that generates the part from escaping between two separate fabric layers and withstands the pressure of the expanding gas. .

In this case, in the two separate fabric layers, the inclination of the upper layer forms the weft and tissue points of the lower layer, or the weft of the considerable layer forms the inclination and tissue points of the lower layer, or the inclination of the lower layer. A tissue point tissue line or tissue surface formed by forming the weft and tissue points of the top layer or the weft of the bottom layer forming the slope and tissue points of the top layer so that the two fabric layers form one layer in the tissue part. . The tissue that makes such a connection is called a connection organization, and when the connection organization appears in dots, it is called a connection point.When the connection organization appears in a line, it is called a connection line, and when the connection organization appears in a plane, it is called a connection surface. Connection and connection surface are called connection parts. In addition, the tissue point refers to the area where the warp and weft cross each other up and down to form a fabric.

As described above, the fabric including a tissue that is joined to the tissue separated into the top layer and the bottom layer may be divided into a layered tissue (A, B in Figs. 2 and 4) and a connecting tissue (C in Figs. 2 and 4), In addition, according to the arrangement of the pattern, the region closed by the layered tissue (B of FIG. 4), that is, the bulging region and the connective tissue (C of FIGS. 2 and 4), and the external tissue of the closed region by the connective tissue (FIG. 4). It has a structure that divides the space into three areas that are not related to parts performance as in A).                     

In the double fabric of the present invention, the upper and lower layers are double tissues (Fig. 1) which form upper and lower layers, respectively, which are plain weave, and the connective tissue can be obtained by forming a mirror image of the upper and lower double tissues around the fastening site. Preferably, two or more of these contact points are formed adjacent to each other so that the medium does not flow out when inflated by a gas such as air.

In addition, it is very important for the airtightness of the double fabric to withstand tensile force by high pressure air or the like to minimize the elongation, so that the formation of the tissue at the point where the two layers are separated or the point at which the joining starts as described above is very important. The method is the most important factor in the design of fabrics with gaseous parts.

The double fabric of the present invention solved such a problem by using a plain weave having a high resistance to extension to the external tensile force as a fabric layer, preferably, the cover factor of the single-sided fabric to a high-density weaving of 1900 or more according to the following formula 1 As a result, the airtightness of the air bag can be further improved.

[Calculation 1]

Cover Factor (CF) = Inclined Density (Bone / in) × (Inclined Denier) ^0.5 + Weft Density (Bone / in) × (Weft Denier) ^0.5

In addition, the double fabric of the present invention is coated with a synthetic resin while forming a mirror image around the intersection of the junction (C) for joining the two separate fabric layers. Synthetic resin used in the coating may be a synthetic resin that is commonly used for fiber coating, of course, it is preferable that the silicone coating is suitable for maintaining the airtightness and strength during development.

The coating method is preferably a multi-stage coating in which a plurality of coatings are applied to the fabric surface in order to effectively fill gaps in the fabric. When the undercoat and the topcoat are combined with the multi-step coating, not only the airtightness is improved but also the thickness of the fabric is reduced compared to the coating amount, thereby improving the flexibility effectively.

At this time, the preferred coating amount should exceed 40 g / m 2, and preferably less than 150 g / m 2. If the coating is less than 40 g / ㎡ It is not possible to maintain a bulging state for more than 5 seconds at a constant pressure after deployment because the airbags a lot of airflow. When it exceeds 150 g / m 2, the airbag becomes too thick to deteriorate the storage capacity, and the airbag cannot contact the structure when the airbag is deployed. At this time, preferably, the thickness of one fabric surface measured by ASTM D 1777 method should be 0.5 mm or less, and the value of stiffness measured by ASTM D 4032 circular band method should be 3.5 Kgf or less. .

In addition, when the airbag internal pressure is measured 5 seconds after the initial pressure of 50 KPa is applied to the airbag composed of the airbag, it must be 6 KPa or more to function as a side curtain type airbag. In order to prevent the rupture when the side curtain type airbag is deployed due to the actual high temperature and high pressure inflate, the connection part (C in Fig. 2) should be at least 80 Kg / in when the bar strength is measured by ASTM D 5822 method. In addition, the elongation at break must not exceed 60% to minimize the amount of air escape to the joint during deployment and to prevent the yarn from melting due to high heat.

In particular, since side curtain type airbags have a relatively large coating amount compared to general airbags, it is very important to maintain the strength when the fabric is worn due to the vibration of the vehicle in order to function as a side curtain type airbag even after a long period of time. . The double fabric of the present invention shall have a strength retention of at least 80% in the coating cross section wear test measured according to ASTM D 4157. If the strength is less than 80%, the airbag may burst upon deployment.

In another aspect, the present invention provides a side curtain type airbag for protecting passengers of a vehicle including a double fabric having a part of the gas, the side curtain type airbag of the present invention is inflated for at least 5 seconds or more while the vehicle is rolling There is a feature to be.

Hereinafter, examples of the present invention will be described. The following examples are only for illustrating the present invention and the present invention is not limited to the following examples.

Example 1

Two layers separated using warp nylon 420 denier weft nylon 420 denier use the tissue shown in Fig. 1, and the joint is a jacquard loom using the tissue shown in Figs. 2 and 3 (a) and (b). The weaving density was 52 pieces per inch, and the weft density was 52 pieces per inch. At this time, the pattern was to form a closed seam by the mirror image arrangement of the plain weave presented in the present invention over the entire width of the fabric.                     

Except for the pattern of the portion to be inflated by air or the like, the outside of the closed seam line formed a tangled structure suitable for its use. At this time, the structure on the surface of the connection is not necessarily the connection job shown in the present invention.

The woven fabric is made of silicon and the coating amount is 100 g / m2, so that the coating process is thin and the top coating is applied in two stages so that air is not leaked through the junction point or tissue point, which forms a thin but separate two layer. Treated. The finished fabric was cut out to the outside of the closed system consisting of the connection point, and the thickness of one side of the fabric measured by ASTM D 1777 was 0.4 mm for use as the main part of the car curtain airbag. The value of the lecture measured by the 4032 circular band method was 2.5 Kgf.

In addition, when the airbag internal pressure was measured 5 seconds after the initial pressure of 50 KPa was applied to the airbag composed of this, 9.5 KPa, and the connection part (C in FIG. 2) was 123 Kg when the bark strength was measured by the ASTM D 5822 method. / in, and the elongation at break was 49%. In addition, in the coating section wear test measured in accordance with ASTM D 4157, a strength retention ratio of 93% was obtained to provide excellent storage and development ease as a side curtain for automobiles.

Example 2

The two layers separated using warp nylon 315 denier weft nylon 315 denier use the tissue shown in FIG. 1, and the joint is a jacquard loom using the tissue shown in FIGS. 2 and 3 (a) and (b). The weaving density was 60 bones per inch, and the weft density was 60 papers per inch. At this time, the pattern was to form a closed seam by the mirror image arrangement of the plain weave presented in the present invention over the entire width of the fabric.

Except for the pattern of the portion to be inflated by air or the like, the outside of the closed seam line formed a tangled structure suitable for its use. At this time, the structure on the surface of the connection is not necessarily the connection job shown in the present invention.

The woven fabric is made of silicon and the coating amount is 90 g / m 2 so as to prevent the outflow of air through the junction point, that is, the tissue point, to form a separate two layer. The finished fabric was cut to the outside of the closed system consisting of the junction point, and the thickness of one side of the fabric measured by ASTM D 1777 was 0.39 mm for use as the main part of the car curtain airbag. The value of the lecture measured by the 4032 circular band method was 1.9 Kgf.

In addition, when the airbag internal pressure was measured 5 seconds after the initial pressure of 50 KPa was applied to the airbag composed of the airbag, 12.5 KPa, and the connection part (C in FIG. 2) was 119 Kg when the bark strength was measured by the ASTM D 5822 method. and elongation at break was 43%. In addition, in the coating section wear test measured in accordance with ASTM D 4157, a strength retention ratio of 90% was obtained to provide excellent storage and development ease as a side curtain for automobiles.

Comparative Example 1

The two layers separated using warp nylon 420 denier weft nylon 420 denier use the tissue shown in FIG. 1, and the joint is a jacquard loom using the tissue shown in FIGS. 2 and 3 (a) and (b). Furnace density was 46 bones per inch, and weft density was 46 bones per inch. At this time, the pattern was to form a closed seam by the mirror image arrangement of the plain weave presented in the present invention over the entire width of the fabric.

Except for the pattern of the portion to be inflated by air or the like, the outside of the closed seam line formed a tangled structure suitable for its use.

The woven fabric was coated in the same manner as in Example 1, and the thickness of one fabric surface measured by ASTM D 1777 was 0.38 mm, and the value of stiffness measured by ASTM D 4032 circular band method was 1.9. It was Kgf.

In addition, when the airbag internal pressure was measured 5 seconds after the initial pressure of 50 KPa was applied to the airbag composed of the airbag, 5.8 KPa, and the connection part (C in FIG. 2) was 109 Kg when the bark strength was measured by the ASTM D 5822 method. / in and elongation at break was 47%. In addition, in the coating section wear test measured by ASTM D 4157, the strength retention rate was 90%, but the storage performance was excellent, but the internal pressure was too low. As a result, air tightness of the air bag was poor.

Comparative Example 2

In the double fabric made in the same manner as in Example 1, the coating amount was 200 g / m 2, and the finished fabric was simply treated by the one-step coating method, and the amount of air discharged per unit length was 0.6 L / when measured at a pressure of 2.5 KPa. The airtightness of the air bag was maintained at min cm, and the predetermined air bag shape was maintained, but the thickness of the fabric measured by ASTM D 1777 method was 0.52 mm, and the value of the lecture measured by ASTM D 4032 circular band method was 3.6 Kgf. As a result, a product having poor storage properties and ease of development as a side curtain for automobiles was obtained.

Fabrics with parts of the present invention, the fabric can be manufactured in a structure that can omit the sewing process in the weaving step, thereby significantly lowering the manufacturing cost, densely structured the connection part air ventilation of the connection part It is very strong because it can lower significantly, and in particular, it is possible to manufacture various types of air pockets using jacquard because the fabric layers are all plain weave. It is suitable for applications such as mold products.

Claims (5)

A fabric coated with a synthetic resin of a fabric produced by stitching two separate plain weaving layers that are woven at the same time using a weaving machine and the stitching tissue that joins the two fabric layers while forming a mirror image around the intersection. (1) The thickness of one fabric surface measured by ASTM D 1777 method is 0.5 mm or less, (2) the value of the stiffness measured by ASTM D 4032 circular band method is 3.5 Kgf or less; (3) When the internal pressure is measured 5 seconds after the gas is applied at an initial pressure of 50 KPa, it is 6 KPa or more. (4) When the joint strength is measured by the bark strength according to ASTM D 5822 method, it is 80 Kg / in or more and the cut elongation is less than 60%. (5) Strength retention rate of 80% or more in the coating section wear test measured by ASTM D 4157 Double woven fabric with part properties of a gas with properties. The method of claim 1, The connective tissue is formed by repeating the mirror image twice or more double fabrics with a part of the gas. The method of claim 1, The double fabric with a part of the gas when the cover factor of the fabric is calculated by the following formula 1: 1900 or more: [Calculation 1] Cover Factor (CF) = Inclined Density (Bone / in) × (Inclined Denier) ^0.5 + Weft Density (Bone / in) × (Weft Denier) ^0.5 The method of claim 1, A double fabric having a part composition of a gas of which the coating amount on one side of the double fabric exceeds 40 g / m 2 and is less than 150 g / m 2. A side curtain type airbag for automobile passenger protection comprising a double fabric having a part by gas according to any one of claims 1 to 4.

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