Abstract:
An airbag construction for a vehicle is described. The construction utilizes non-circular polygon shaped panels, which provide greater nesting efficiency than previously achieved by comparable airbags using round panels. In addition, the construction enables the airbag to take full advantage of the strength of the yarns forming the fabric, and the energy absorption of the fabric construction, enabling the use of lower tenacity yarns and/or materials at comparable levels of performance.
Abstract:
Typical road surfaces are concrete, and gravel filled asphalt. They are very abrasive to fabrics that slide on those surfaces. For the new side impact curtain-type airbag, in a rollover situation, the airbag needs to protect the occupant from directly contacting the road hazard and should not deflate quickly or break when sliding on such road surfaces. We have found that a layer of elastomer can provide much better abrasion resistance than a layer of heavy industrial fabric. A Jacquard bag coated with 1.2 oz/yd2 polyurethane showed significant increase in air leakage rate after 5 cycles of concrete sliding abrasion. A 3 mil thick polyurethane film was laminated to the coated Jacquard woven airbag. After 110 cycles of sliding abrasion using the same concrete, no visual damage or change In bag leakage was observed. This finding indicates surprisingly better abrasion resistance of a thin elastomer film than a heavy industrial fabric.
Abstract:
The present invention relates to an airbag cushion which exhibits a low amount of seam usage (in order to attach at least two fabric panels or portions of a panel together) in correlation to an overall high amount of available inflation airspace within the cushion itself. These correlated elements are now combined for the first time in what is defined as an effective seam usage index (being the quotient of the length of overall seams on the cushions and the available inflation airspace volume). The inventive cushion must have at least one substantially straight seam and must possess an effective seam usage factor of less than about 0.11. A cushion exhibiting such a low seam usage factor and also comprising an integrated looped pocket for the disposition of an inflator can is also provided as well as an overall vehicle restraint system comprising the inventive airbag cushion.
Abstract:
An inflatable air bag structure formed from panels joined together along one or more sewn seams. The sewn seams are sealed at the interior between the adjoined layers by a low modulus, high elongation sealant surrounding at least a portion of the sewing threads. The sealant fails under tension in a cohesive manner by tearing through the interior of the sealant layer while remaining adhered to the fabric thereby maintaining gas blockage when the seam is placed in tension.
Abstract:
A fabric construction utilizing a tying yarn knitting arrangement wherein a portion of the tying yarns are threaded to engage needles so as to form two stitches with one on either side of the inlay warp yarn at rows of stitch formation. The neighboring stitches resist yarn separation and resultant combing while also blocking the commencement and propagation of de-knitting when a tying yarn is broken thereby enhancing seam strength character.
Abstract:
A two or more chambered airbag provides much improved safety and/or performance. A modified single chamber airbag can be used as the primary chamber of the two-chamber airbag. A piece of fabric of appropriate size is sewn to the inside or outside surface of the front panel of the primary chamber to create the secondary chamber. One or more apertures are opened between the primary and secondary chambers. In order for the secondary chamber to inflate properly, the tethers of the primary chamber are shortened to 50% to 80% of their original length. The size or location of the tether sewing to the inner surface of the front panel of the primary chamber is also adjusted to create a desired shape of the secondary chamber when deployed.
Abstract:
The present invention relates to air bag tethers and to a pattern-wise arrangement of such tethers in relation to air bag panels on a fabric blank, thus resulting in increased fabric utilization per tether and an overall cost savings per finished air bag. The air bag tether system of the present invention is comprised of two congruent tether panels that are joined to one another and to a respective air bag panel. In a preferred embodiment, the tether panel that is attached to the face panel of the air bag is cut in alignment with the warp and the fill of the fabric blank, while the rear tether panel that is attached to the rear panel of the air bag is cut on the bias with respect to the warp and the fill of the fabric blank. The two tether panels are then connected to one another to form a functional tether system. This two-piece construction, with one bias-cut piece, decreases the amount of fabric that is used in the manufacture of the air bag and tethers, while providing sufficient elongation for the tether system to be functional.
Abstract:
The present invention relates to air bag tethers and to a pattern-wise arrangement of such tethers in relation to air bag panels on a fabric blank. In one embodiment, the front tether panel is comprised of two or more tether segments that cut in alignment with the warp and the fill of the fabric blank, while the rear tether panel is comprised of two or more tether segments that are cut on the bias with respect to the warp and the fill of the fabric blank. The front and rear tether panels are then connected to one another to form a functional tether system. This multiple-segment construction, with its bias-cut segments, decreases the amount of fabric that is used in the manufacture of the air bag and tethers, while providing sufficient elongation for the tether system to be functional.
Abstract:
The present invention relates to air bag tethers and to a pattern-wise arrangement of such tethers in relation to air bag panels on a fabric blank. In one embodiment, the front tether panel is comprised of two or more tether segments that cut in alignment with the warp and the fill of the fabric blank, while the rear tether panel is comprised of two or more tether segments that are cut on the bias with respect to the warp and the fill of the fabric blank. The front and rear tether panels are then connected to one another to form a functional tether system. This multiple-segment construction, with its bias-cut segments, decreases the amount of fabric that is used in the manufacture of the air bag and tethers, while providing sufficient elongation for the tether system to be functional.
Abstract:
A fabric for use in an air bag is provided. The fabric of the invention is produced by mechanically compressing a preliminary fabric constructed substantially of synthetic yarn such that the packed volume per unit area of the compressed fabric is less than the packed volume per unit area of the preliminary fabric. Air permeability is not adversely affected.