High-density hollow weave ground fabric

• US 7,690,401 B2
• Filed: 09/29/2004
• Issued: 04/06/2010
• Est. Priority Date: 09/29/2003
• Status: Active Grant

• Current Assignee: Asahi Kasei Kabushiki Kaisha
• Original Assignee: Asahi Kasei Chemicals Corporation (Asahi Kasei Corporation)
• Inventors: Kojima, Miyoko, Okuno, Tokio
• Primary Examiner(s): SINGH-PANDEY, ARTI R
• Application Number:
  US10/573,893
• Publication Number:
  US 20070007756A1
• Time in Patent Office: 2,015 Days
• Field of Search: 139/383.R, 139/384.R, 139/387.R, 139/389, 280/728.1, 280/730.1, 280/730.2, 428/34.1, 428/34.3, 428/34.7, 428/36.1, 428/36.4, 428/36.91, 428/98, 428/102, 428/192, 428/193, 383/3
• US Class Current: 139/384.00R
• CPC Class Codes: B60R 2021/23514 coated fabric
• CPC Class Codes: B60R 2021/23547 one piece weaving
• 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: D03D 1/02 Inflatable articles
• CPC Class Codes: Y10T 442/3179 Woven fabric is characterized by a particular or differential weave other than fabric in which the strand denier or warp/weft pick count is specified

Abstract

A high-density hollow weave fabric for an air bag is provided, wherein an inflatable double-layer hollow weave portion is encircled on the outer periphery thereof with a seam zone including a reversible figured weave pattern and a basket weave pattern. In the seam zone, the reversible figured weave pattern is closest to the boundary of the inflatable double-layer hollow weave portion, and a first weave portion including the basket weave pattern, a narrow width hollow weave portion and a second basket weave patterns continue in this order. The inventive fabric is woven without the generation of fluffs and wrinkles, and the wrinkle-free coating is provided in the boundary between the double-layer hollow weave portion and the seam zone encircling the former. By using this high-density hollow weave fabric, it is possible to make the curtain-shaped air bag deployable at a high speed while preventing gas from leaking.

Claims

1. A high-density hollow weave fabric comprising a deployable/inflatable double-layer bag portion, a seam zone provided on the outer periphery of the bag portion, and a non-deployable/inflatable portion, which portions are formed of thermoplastic synthetic fiber yarns of a yarn size in a range from 100 dtex to 500 dtex, wherein at least part of the seam zone comprises a first weave portion of a 2/2 basket weave pattern, a narrow width hollow weave portion and a second weave portion of a 3/3 basket weave pattern in this order as seen from the bag portion side, and the high-density hollow weave fabric has a silicone resin coating layer of 10 g/m² or more.

2. The high-density hollow weave fabric as defined by claim 1, wherein the first weave portion is composed of at least one reversible figured weave pattern and a 2/2 basket weave pattern.

3. The high-density hollow weave fabric as defined by claim 1, wherein a cover factor of the narrow width hollow weave portion is in a range from 1900 to 2400 per one surface, and the number of yarns is in a range from 20 ends to 40 ends.

4. The high-density hollow weave fabric as defined claim 1, wherein the number of yarns in the 2/2 basket weave pattern is in a range from 4 ends to 16 ends.

5. The high-density hollow weave fabric as defined by claim 1, wherein the number of yarns in the 3/3 basket weave pattern is in a range from 3 ends to 15 ends.

6. The high-density hollow weave fabric as defined by claim 1, wherein a yarn size of the thermoplastic synthetic fiber yarn is 400 dtex or less.

7. The high-density hollow weave fabric as defined by claim 1, wherein a yarn size of the thermoplastic synthetic fiber yarn is 250 dtex or less.

8. The high-density hollow weave fabric as defined by claim 1, wherein the thermoplastic synthetic fiber yarn is a filament of polyhexamethylene adipamide.

9. The high-density hollow weave fabric as defined by claim 1, wherein the first weave portion comprises a series of 2 to 6 reversible figured weave patterns.

10. The high-density hollow weave fabric as defined by claim 1, wherein at least part of the non-inflatable hollow weave portion has a partially knotted section.

11. The high-density hollow weave fabric as defined by claim 1, wherein the high-density hollow weave fabric has a silicone coating layer of 140 g/m² or less.

12. The high-density hollow weave fabric as defined by claim 1, wherein a fiber size of the synthetic fiber is in a range from 0.5 dtex to 4.5 dtex.

13. The high-density hollow weave fabric as defined by claim 1, wherein the high-density hollow weave fabric has a silicone coating layer of 50 g/m² or less.

14. A curtain-shaped air bag formed of a high-density hollow weave fabric as defined by claim 1.

16. The curtain-shaped air bag as defined by claim 14, wherein the air bag is coated with silicone resin of 50 g/m² or less and has a seam zone of a reversible figured weave pattern and a basket weave pattern.

15. A curtain-shaped air bag formed of polyhexamethylene adipamide fiber and coated with silicone resin of 10 g/m² to 140 g/m², wherein an inferior pressure retention ratio after inflation is 70% or more.