FABRIC FOR AIR BAG

• US 20150329998A1
• Filed: 12/17/2013
• Published: 11/19/2015
• Est. Priority Date: 12/17/2012
• Status: Active Grant

• Current Assignee: Asahi Kasei Kabushiki Kaisha (Asahi Kasei Corporation)
• Original Assignee: Asahi Kasei Fibers Corporation (Asahi Kasei Corporation)
• Inventors: ISE, Fumiaki
• Granted Patent: US 9,868,413 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60R 2021/23509 Fabric
• CPC Class Codes: B60R 21/235 characterised by their material
• CPC Class Codes: D03D 1/02 Inflatable articles
• CPC Class Codes: D03D 15/283 synthetic polymer-based, e.g. polyamide or polyester fibres cellulose-based artificial fibres D03D15/225
• CPC Class Codes: D03D 15/49 textured chenille D03D27/18; curled; crimped
• CPC Class Codes: D03D 15/573 Tensile strength
• CPC Class Codes: D03D 47/32 by liquid jet
• CPC Class Codes: D06C 15/00 Calendering, pressing, ironing, glossing or glazing textile fabrics for making patterns or designs D06C23/00
• CPC Class Codes: D06C 15/08 Rollers therefor

Abstract

The purpose of the present invention is to provide a fabric for an air bag that, during high-pressure deployment at high speed, maintains low air permeability as an air bag and is capable of maintaining the low air permeability even after exposure to heat. This fabric for an air bag comprises a synthetic fiber and is characterized by the contact angle of a circumscribed circle at intersecting sections in which the warp thread and the weft thread come in contact in the cross section of the fabric is at least 80° in both the warp thread direction and the weft thread direction.

Claims

1. A fabric for an air bag composed of synthetic fibers, wherein the contact angle of a circumscribed circle at intersecting sections where the warp thread and weft thread come in contact in a cross-section of the fabric is 80°

or more in both the warp thread direction and the weft thread direction.

2. The fabric for an air bag according to claim 1, wherein the radius of an circumscribed circle at the intersecting sections where the warp thread and the weft thread come in contact is 400 μ

m or less in both the warp thread direction and the weft thread direction.

3. The fabric for an air bag according to claim 1 or 2, wherein the synthetic fibers are composed of synthetic filaments having a substantially round cross-section.

4. The fabric for an air bag according to any of claims 1 to 3, wherein the fabric is a plain weave fabric.

5. The fabric for an air bag according to any of claims 1 to 4, wherein the fineness of the synthetic fibers composing the fabric is 300 dtex to 720 dtex.

6. The fabric for an air bag according to claim 5, wherein the fineness of the synthetic fibers composing the fabric is 380 dtex to 550 dtex, and the filament fineness thereof is greater than 2 dtex but less than 8 dtex.

7. The fabric for an air bag according to any of claims 1 to 6, wherein an increase in air permeability after exposing the fabric to heat treatment at 140°

C. for 100 hours is six-fold or less.

8. The fabric for an air bag according to any of claims 1 to 7, wherein the fabric contains 0.03% by weight to 0.3% by weight of a cyclohexane-extracted oil component.

9. The fabric for an air bag according to any of claims 1 to 8, wherein dimensional stability of the fabric at 120°

C. is within ±

4%.

10. The fabric for an air bag according to any of claims 1 to 9, wherein the fabric is imprinted with a bar code.

11. The fabric for an air bag according to any of claims 1 to 10, wherein the number of entanglements of the synthetic fibers is 5 counts/m to 30 counts/m.

12. An air bag that uses the fabric for an air bag according to any of claims 1 to 11.

13. The air bag according to claim 12, which does not have a resin coating.

14. A method for producing a fabric for an air bag composed of synthetic fibers, comprising:

1) weaving with high tension warp threads in a water jet loom,

     2) carrying out a washing treatment step at 80°

C. or lower or not carrying out a washing step,

     3) drying at a temperature of 120°

C. or lower, and

     4) carrying out calendaring processing.