Airbag fabric and airbag

Patent metadata

Field	Value
Publication number	US-9834167-B2
Application number	US-201414758297-A
Country	US
Kind code	B2
Filing date	Jan 27, 2014
Priority date	Jan 28, 2013
Publication date	Dec 5, 2017
Grant date	Dec 5, 2017

Abstract

An airbag fabric is excellent in slippage amount and strength in a sewn portion. The airbag fabric is made of a synthetic fiber, the fabric having a constant (load of 98 N/30 mm) elongation of 1 to 5% and having a residual strain rate of 0.1 to 1.5%, the residual strain rate being obtained when the fabric is allowed to stand still for 10 minutes from the removal of the 98 N/30 mm load after the retention of the fabric for 10 minutes while the 98 N/30 mm load is applied to the fabric. The strength in the sewn portion is preferably 1200 N or more in each of the warp and the weft.

First claim

The invention claimed is:

1. An airbag fabric comprising a synthetic fiber, the fabric having a constant elongation of 1 to 5% and a residual strain rate of 0.1 to 1.5% in each of a warp and a weft of the fabric, and the constant elongation and the residual strain rate being calculated by measuring methods below, respectively:
constant elongation ( EP ) (%)=( L 2− L 1)/ L 1×100, and

residual strain rate ( ES ) (%)=( L 3− L 1)/ L 1×100

wherein
L1: a distance between marked lines on the fabric when an initial load of 1.96 N/30 mm is applied to the fabric;
L2: a distance between the marked lines after the fabric has been retained for 10 minutes while a load of 98 N/30 mm has been applied to the fabric; and
L3: a distance between the marked lines when the initial load of 1.96 N/30 mm is applied to the fabric after the fabric has been allowed to stand still for 10 minutes from the removal of the 98 N/30 mm load after the retention of the fabric for 10 minutes while the 98 N/30 mm load is applied to the fabric.

2. The airbag fabric according to claim 1 , which has a strength in a sewn portion of 1200 N or more in each of the warp and the weft.

3. The airbag fabric according to claim 1 , wherein a warp yarn and a weft yarn each have a total fineness of 350 to 700 dtex, and each have a monofilament fineness of 2.5 to 7 dtex.

4. The airbag fabric according to claim 2 , wherein a warp yarn and a weft yarn each have a total fineness of 350 to 700 dtex, and each have a monofilament fineness of 2.5 to 7 dtex.

5. The airbag fabric according to claim 1 , which has a cover factor of 1800 to 2300.

6. The airbag fabric according to claim 2 , which has a cover factor of 1800 to 2300.

7. The airbag fabric according to claim 3 , which has a cover factor of 1800 to 2300.

8. An airbag comprising the airbag fabric according to claim 1 .

9. An airbag comprising the airbag fabric according to claim 2 .

10. An airbag comprising the airbag fabric according to claim 3 .

11. An airbag comprising the airbag fabric according to claim 4 .

12. A method of producing an airbag fabric, using a weaving machine to produce the airbag fabric according to claim 1 , wherein warping into the warp is performed under conditions of using a warping sheet tension of 40 to 50 gf per yarn of the warp (392 to 490 mN per yarn of the warp), and a beamer sheet tension of 70 to 90 gf per yarn of the warp (686 to 883 mN per yarn of the warp).

13. The method according to claim 12 , wherein the weaving is performed under a condition of using a warp tension of the weaving of 100 to 250 gf per yarn of the warp (981 to 1961 mN per yarn of the warp).

14. A method of producing an airbag fabric comprising, after the weaving recited in claim 12 , scouring a resultant workpiece at a temperature of 20 to 80° C., and further heatsetting a scoured workpiece at a temperature of 110 to 190° C.

15. A method of producing an airbag fabric comprising, after the weaving recited in claim 13 , scouring a resultant workpiece at a temperature of 20 to 80° C., and further heatsetting a scoured workpiece at a temperature of 110 to 190° C.

Assignees

• Toray Industries

Inventors

• Tanaka Nobuaki
• Yamada Satoshi

Classifications

• Y10T442/313

  Strand material formed of individual filaments having different chemical compositions · CPC title

• D06C19/00

  Breaking or softening of fabrics (by stretching D06C3/00; by calendering, pressing, or beetling D06C15/00; by fulling D06C17/00) · CPC title

• D03D1/02

  Inflatable articles · CPC title

• B60R21/235 Primary

  characterised by their material · CPC title

• B60R2021/23542

  Weaving · CPC title