Air bag fabric
AssigneeMilliken Research Corporation
InventorsDerek L. Bowen, Charles L. Bower, John A. Sollars, Jr.
Life of this patent
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Abstract
The woven structure for an air bag is designed to have an air permeability which does not increase by more than about fifty percent when the fabric is subjected to substantially equivalent tension forces in both the warp and fill. This is accomplished by a multiple warp harness arrangement using combinations of twill and basket weave pattern components. This weave construction does not only avoid substantial increases in permeability over a range of biaxial tensions but also may result in a permeability decrease when subjected to tensions which approximate those applicable during actual air bag deployment.
Claims32
An inflatable cushion for use in an occupant restraint system at least partially formed from uncoated woven textile fabric, wherein said textile fabric comprises a plurality of warp yarns disposed in a warp direction interwoven with a plurality of fill yarns disposed in a fill direction in a predetermined weave configuration such that the textile fabric has an air permeability which at no time increases by more than about fifty percent from that measured in a substantially untensioned state at a pressure drop of 124 Pascals (0.5 inches of water) across the fabric when the fabric is subjected to substantially equivalent tension forces in both the warp and the fill directions up to about 150 pounds force per linear inch.
An uncoated woven textile fabric for use in an inflatable cushion in an occupant restraint system, comprising:
- a plurality of warp yarns disposed in a warp direction interwoven with a plurality of fill yarns disposed in a fill direction in a predetermined weave configuration such that said textile fabric has an air permeability which at no time increases by more than about fifty percent from that measured in a substantially untensioned state at a pressure drop of 124 Pascals (0.5 inches of water) across the fabric when subjected to substantially equivalent tension forces in both the warp and the fill directions up to about 150 pounds force per liner inch.
An uncoated woven textile fabric, comprising:
- a plurality of warp yarns disposed in a warp direction interwoven with a plurality of fill yarns disposed in a fill direction in a predetermined weave configuration such that said textile fabric has a measured air permeability which is not more than about three standard cubic feet of air per minute per square foot of fabric at a pressure drop of 124 Pascals (0.5 inches of water) across the fabric when the fabric is in a substantially untensioned state and said air permeability at no time increases by more than about fifty percent as measured at a pressure drop of 124 Pascals across the fabric when the fabric is subjected to substantially equivalent tension forces in both the warp and the fill directions up to about 150 pounds force per linear inch of fabric.
An uncoated, woven textile fabric having a controlled air permeability, the fabric comprising:
- a plurality of warp yarns disposed in a warp direction interwoven with a plurality of fill yarns disposed in a fill direction in a predetermined weave configuration such that said fabric has an air permeability which decreases by about twenty percent or more from that measured in a substantially untensioned state at a pressure drop of three pounds force per square inch across said fabric when said fabric is subjected to substantially equivalent tension forces of about eighty pounds force per linear inch in both the warp and the fill directions.
Dependencies are inferred from the claim text.