MULTI-LAYER FABRIC

Abstract

The present disclosure relates to a multi-layer fabric, and an airbag formed of the multi-layer fabric. The multi-layer fabric can provide an airbag capable of sufficiently protecting a driver or a passenger by minimizing damage caused by broken glass fragments when a vehicle is overturned.

Claims

1. A multi-layer fabric comprising an inflating part; and a co-woven part surrounding the inflating part, wherein at least one layer of the inflating part comprises a first region formed of two or more types of weaves comprising 1/1 plain weave.

2. The multi-layer fabric of claim 1, wherein the first region is formed by inserting a weave other than 1/1 plain weave every 2 to 15 1/1 plain weave.

3. The multi-layer fabric of claim 1, wherein the first region is formed by inserting a weave other than 1/1 plain weave every 2 to 15 1/1 plain weave in both warp and weft directions.

4. The multi-layer fabric of claim 1, wherein the first region is formed by inserting 1 to 5 weaves other than 1/1 plain weave every 2 to 15 1/1 plain weave.

5. The multi-layer fabric of claim 1, wherein the first region is included in an area ratio of 5% to 50% of a total area of the layer.

6. The multi-layer fabric of claim 1, wherein the first region is formed of 1/1 plain weave and at least one weave selected from the group consisting of 2/1 twill weave, 3/1 satin weave, 2/2 basket weave, and 3/3 basket weave.

7. The multi-layer fabric of claim 1, wherein the first region is formed of 1/1 plain weave and at least one weave selected from the group consisting of 2/1 twill weave, and 3/1 satin weave.

8. The multi-layer fabric of claim 1, wherein a region other than the first region is a second region formed of 1/1 plain weave.

9. The multi-layer fabric of claim 1, wherein the first region has tear strength of 300 to 800 N in the warp direction and tear strength of 350 N to 900 N in the weft direction, measured according to ISO 13937-2.

10. The multi-layer fabric of claim 1, wherein the first region has tensile strength of 3200 to 3500 N/5 cm in the warp direction and tensile strength of 2800 to 3300 N/5 cm in the weft direction, measured according to ISO 13934-1.

11. The multi-layer fabric of claim 1, wherein the first region has elongation in the warp direction of 25% to 45% and elongation in the weft direction of 20% to 40%, measured according to ISO 13934-1.

12. A airbag formed of the multi-layer fabric of claim 1.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0045] FIG. 1 shows a cross-section of a double-layer fabric according to an embodiment of the present disclosure.

[0046] FIG. 2 is a weave diagram of the first region in which 2/1 twill weave is inserted into 1/1 plain weave according to an embodiment of the present disclosure.

[0047] FIG. 3 shows a weave structure of a double-layer fabric including the first region of FIG. 2

[0048] FIG. 4 is a weave diagram of a fabric showing 1/1 plain weave of Comparative Example 1.

[0049] FIG. 5 shows a weave structure of a double-layer fabric according to the weave diagram of the fabric of FIG. 4.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0050] Hereinafter, the function and effect of the present invention will be described in more detail through specific examples. However, these examples are for illustrative purposes only, and the invention is not intended to be limited by these examples.

Example 1: Preparation of Double-Layer Fabric

[0051] A double-layer fabric was prepared on a jacquard machine using 470 dtex of polyamide (nylon 66) yarn.

[0052] The double-layer fabric, as shown in FIG. 1, has a structure in which two separate fabric layers and outer periphery of the two fabric layers are co-woven, and was woven at a time by a one-piece woven method.

[0053] The two fabric layers separated from each other were prepared to include a first region woven such that 2/1 twill weave was placed every three 1/1 plain weave in both warp and weft directions, respectively, as shown in FIGS. 2 and 3.

[0054] After coating 75 g/m.sup.2 of silicone resin on both sides of the prepared double-layer fabric using a knife, the temperature was gradually raised to 90° C. to 150° C. to perform primary curing, followed by heat-treatment at 180° C. to prepare a coated double-layer fabric.

Example 2: Preparation of Double-Layer Fabric

[0055] A coated double-layer fabric was prepared in the same manner as in Example 1, except that the first region was woven such that 2/1 twill weave was placed every five 1/1 plain weave in both warp and weft directions.

Example 3: Preparation of Double-Layer Fabric

[0056] A coated double-layer fabric was prepared in the same manner as in Example 1, except that the first region was woven such that 2/1 twill weave was placed every eleven 1/1 plain weave in both warp and weft directions.

Example 4: Preparation of Double-Layer Fabric

[0057] A coated double-layer fabric was prepared in the same manner as in Example 1, except that the first region was woven such that 2/1 twill weave was placed every thirteen 1/1 plain weave in both warp and weft directions.

Example 5: Preparation of Double-Layer Fabric

[0058] A coated double-layer fabric was prepared in the same manner as in Example 2, except that the weave pattern was changed such that 3/1 satin weave was placed instead of 2/1 twill weave in the first region of Example 2.

Comparative Example 1: Preparation of Double-Layer Fabric

[0059] A coated double-layer fabric was prepared in the same manner as in Example 1, except that the double-layer fabric was prepared by weaving only 1/1 plain weave as shown in FIGS. 4 and 5.

Test Example: Evaluation of Physical Properties of Double-Layer Fabric

[0060] Five samples were prepared in each of the first regions of the double-layer fabrics prepared in Examples 1 to 5, and 5 samples were prepared in the double-layer fabric prepared in Comparative Example 1. Then, physical properties of the prepared samples were evaluated by the method described below, and the average value was obtained and shown in Table 1.

[0061] 1. Tear Strength

[0062] The tear strength in the warp direction and the tear strength in the weft direction of the prepared samples were measured. The tear strength was measured according to ISO 13937-2 after the sample was left at room temperature for 24 hours, and the tear strength in the warp direction and the tear strength in the weft direction were measured, respectively, followed by obtaining an average value thereof.

[0063] 2. Elongation

[0064] The elongation in the warp direction and the elongation in the weft direction of the prepared samples were measured. The elongation was measured according to ISO 13934-1 after the sample was left at room temperature for 24 hours, and the elongation in the warp direction and the elongation in the weft direction were measured, respectively, followed by obtaining an average value thereof.

[0065] 3. Tensile Strength

[0066] The tensile strength in the warp direction and the tensile strength in the weft direction of the prepared samples were measured. The tensile strength was measured according to ISO 13934-1 after the sample was left at room temperature for 24 hours, and the tensile strength in the warp direction and the tensile strength in the weft direction were measured, respectively, followed by obtaining an average value thereof.

TABLE-US-00001 TABLE 1 Insertion Tear Tear Tensile Tensile spacing of strength strength Elongation Elongation strength strength weave other (warp (weft (warp (weft (warp (weft than 1/1 direction, direction, direction, direction, direction, direction, plain weave N) N) %) %) N/5 cm) N/5 cm) Example 1 3 589 700 36 27 3405 3309 Example 2 5 614 708 38 29 3440 3057 Example 3 11 410 458 39 30 3395 3128 Example 4 13 307 366 40 30 3426 3196 Example 5 5 525 494 28 25 3201 2863 Comparative 0 256 305 41 32 3453 3271 Example 1

[0067] Referring to Table 1, it has been confirmed that even if the first region of the multi-layer fabric according to an embodiment of the present disclosure is formed of two or more types of weaves including 1/1 plain weave, the multi-layer fabric exhibits significantly improved tear strength while exhibiting elongation and tensile strength almost equal to those of the double-layer fabric (Comparative Example 1) formed only with 1/1 plain weave. Accordingly, it has been confirmed that the multi-layer fabric according to the embodiment can provide an airbag that is not damaged or can minimize damage by broken glass fragments.