Woven Fabric for Air Bag
First Claim
1. A woven fabric for an air bag composed of synthetic fibers, wherein asymmetry R, with respect to the front and back sides of the woven fabric and represented by the following equation, of the radius of curvature φ
- of an intersecting section where the warp thread and the weft thread come in contact in a cross-section of the woven fabric is within the range of 1.05 to 1.50;
R=φ
a/φ
b wherein φ
a represents the larger radius of curvature among the radii of curvature φ
on the front side and rear side of the woven fabric, and φ
b represents the smaller radius of curvature.
2 Assignments
0 Petitions
Accused Products
Abstract
The purpose of the present invention is to provide a woven fabric for an air bag, that, during high-pressure deployment at high speed, has excellent air permeability suppression as an air bag, has high tear strength, has excellent reliability under high loads, and maintains same even after exposure to a high-temperature environment. This woven fabric for an air bag comprises a synthetic fiber and is characterized by the asymmetry (R), in the front and back of the woven fabric and indicated by the following formula, of the radius of curvature (φ) of an intersecting section in which the warp thread and the weft thread come in contact in the cross section of the woven fabric, being in the range 1.05-1.50. R=φa/φb (φa indicates the larger radius of curvature out of the radii of curvature (φ) in the front and back surfaces of the woven fabric, and φb indicates the smaller radius of curvature).
4 Citations
15 Claims
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1. A woven fabric for an air bag composed of synthetic fibers, wherein asymmetry R, with respect to the front and back sides of the woven fabric and represented by the following equation, of the radius of curvature φ
- of an intersecting section where the warp thread and the weft thread come in contact in a cross-section of the woven fabric is within the range of 1.05 to 1.50;
R=φ
a/φ
bwherein φ
a represents the larger radius of curvature among the radii of curvature φ
on the front side and rear side of the woven fabric, and φ
b represents the smaller radius of curvature.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
wherein θ
b represents the contact angle on the φ
b side and θ
a represents the contact angle on the φ
a side.
- of an intersecting section where the warp thread and the weft thread come in contact in a cross-section of the woven fabric is within the range of 1.05 to 1.50;
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5. The woven fabric for an air bag according to any of claims 1 to 3, wherein a cyclohexane-extracted oil component is contained at 0.03% by weight to 0.3% by weight.
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6. The woven fabric for an air bag according to claim 1, wherein the synthetic fibers are composed of synthetic fibers having a substantially round cross-section filaments.
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7. The woven fabric for an air bag according to claim 1, wherein the woven fabric is a plain weave fabric.
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8. The woven fabric for an air bag according to claim 1, wherein the fineness of the synthetic fibers that compose the woven fabric is 300 dtex to 720 dtex.
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9. The woven fabric for an air bag according to claim 8, wherein the fineness of the synthetic fibers that compose the woven fabric is 380 dtex to 550 dtex, and the filament fineness thereof is greater than 2 dtex but less than 8 dtex.
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10. The woven fabric for an air bag according to claim 1, wherein the ratio of air permeability at a pressure difference of 100 kPa between the front and back sides of the woven fabric is 0.90 to 0.20.
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11. The woven fabric for an air bag according to claim 1, wherein a bar code is imprinted thereon.
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12. The woven fabric for an air bag according to claim 1, wherein synthetic fiber substantially free of twisting and having 5 to 30 entanglements/m is used for the weaving thread bulk yarn used to weave the woven fabric.
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13. An air bag wherein the woven fabric for an air bag according to claim 1 is used.
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14. The air bag according to claim 13, which does not have a resin coating.
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15. A method for producing a woven fabric for an air bag composed of synthetic fibers, comprising:
- 1) weaving the warp threads under high tension with a water jet loom,
2) carrying out a washing treatment step at 80°
C. or lower or not carrying out a washing treatment step,
3) drying at a temperature of 120°
C. or lower, and
4) carrying out calendering processing.
- 1) weaving the warp threads under high tension with a water jet loom,
Specification