Side airbag

• US 20020020992A1
• Filed: 08/09/2001
• Published: 02/21/2002
• Est. Priority Date: 08/10/2000
• Status: Active Grant

• Current Assignee: Nihon Plast Company Limited
• Original Assignee: Nihon Plast Company Limited
• Inventors: Kanuma, Tadao
• Granted Patent: US 7,537,238 B2
• Time in Patent Office: Days
• US Class Current: 280/730.2
• CPC Class Codes: B60R 2021/23585 Vulcanisation
• CPC Class Codes: B60R 21/232 Curtain-type airbags deploying mainly in a vertical direction from their top edge
• CPC Class Codes: B60R 21/235 characterised by their material
• CPC Class Codes: Y10T 428/13 Hollow or container type article [e.g., tube, vase, etc.]
• CPC Class Codes: Y10T 442/2164 Coating or impregnation specified as water repellent

Abstract

A side airbag includes two main-body fabrics superimposed to have one sides opposed to each other and including a textile having 400 dtex or less yam, 200 g/m² or less weight, and 2,000 or more cover factor, thermosetting silicone placed at least one sides of the two fabrics, and solventless addition room-temperature-vulcanizing adhesive silicone interposed between the two fabrics at a junction and having 20 or less JIS-A hardness and 800% or more initial fractural elongation after cure.

Claims

1. An airbag for a motor vehicle, comprising:

two portions which form a main body of the airbag, the two portions being superimposed to have one sides opposed to each other, the two portions comprising a textile, the textile having 400 dtex or less yarn, 200 g/m² or less weight, and 2,000 or more cover factor;

a first silicone placed at least the one sides of the two portions, the first silicone comprising a thermosetting silicone; and

a second silicone interposed between the two portions at a junction, the second silicone comprising a solventless addition room-temperature-vulcanizing adhesive silicone, the second silicone having 20 or less JIS-A hardness and 800% or more initial fractural elongation after cure.

2. The airbag as claimed in claim 1, wherein the textile has 235 dtex or less yam and 150 g/m² or less weight.

3. The airbag as claimed in claim 1, wherein the cover factor of the textile is 2,000-2,600.

4. The airbag as claimed in claim 1, wherein at least part of the junction of the two portions is sewed with thread.

5. The airbag as claimed in claim 1, wherein the first silicone is 10-100 g/m² on a basis of solid matter.

6. The airbag as claimed in claim 1, wherein the JIS-A hardness of the second silicone is 2-15.

7. The airbag as claimed in claim 1, wherein the initial fractural elongation of the second silicone is 1,000-1,500%.

8. The airbag as claimed in claim 1, wherein the second silicone has a ratio of the initial fractural elongation to the fractural elongation after 250 h treatment at 100°

C. after cure is 1;

0.8 or more.

9. The airbag as claimed in claim 1, wherein the second silicone has the ratio of the initial fractural elongation to the fractural elongation after 500 h treatment at 100°

C. after cure is 1;

0.8 or more.

10. The airbag as claimed in claim 8, wherein the second silicone is 100-1,000 g/m² on a basis of solid matter.

11. The airbag as claimed in claim 8, wherein the second silicone is 0.1-1.2 mm thickness.

12. The airbag as claimed in claim 8, wherein the second silicone comprises a main agent including vinyl dimethylpolysiloxane, a cross-linking agent including hydrogen-silane-radical containing compound, a curing catalyst including platinum compound.

13. The airbag as claimed in claim 8, wherein the second silicone has 50-500 Pa·

s viscosity, 5-72 h cure time, and 2-24 h pot life.

14. The airbag as claimed in claim 4, wherein when the textile has 250 dtex or less yam, the thread satisfies relationships of 1) 20≦

T≦

80 and

     2) 2≦

T/S≦

8, where T is number count of thread, and S is number of stitches (times/cm).

15. The airbag as claimed in claim 14, wherein when using needle and bobbin threads having different number count, at least one of the threads satisfies the relationships of 1) and 2).

16. The airbag as claimed in claim 2, wherein the yarn of the textile comprises aliphatic polyamide fiber, copolymerized polyamide fiber, polyester fiber, aramid fiber, aromatic polyester fiber, vinylon fiber, ultrahigh-molecular-weight polyethylene fiber, fluorocarbon fiber, polysulphone fiber, polyphenylene sulfide (PPS) fiber, polyether etherketone (PEEK) fiber, polyimide fiber, polyether imide fiber, cellulosic fiber, acrylic fiber, carbon fiber, glass fiber, silicon carbide (SiC) fiber, and alumina fiber.

17. The airbag as claimed in claim 1, further comprising a reinforcing fabric which reinforces a particular portion inside the airbag.

18. A motor vehicle, comprising:

an airbag mounted in a vicinity of a side window of the motor vehicle, the airbag comprising;

two portions which form a main body of the airbag, the two portions being superimposed to have one sides opposed to each other, the two portions comprising a textile, the textile having 400 dtex or less yarn, 200 g/m² or less weight, and 2,000 or more cover factor;

a first silicone placed at least the one sides of the two portions, the first silicone comprising a thermosetting silicone; and

a second silicone interposed between the two portions at a junction, the second silicone comprising a solventless addition room-temperature-vulcanizing adhesive silicone, the second silicone having 20 or less JIS-A hardness and 800% or more initial fractural elongation after cure.