| 摘要 |
<p>A woven fabric useful for air bags capable of smoothly opening in an initial stage of inflation and having a high burst strength and an excellent safety satisfies all the requirement that (A) a stress strain curve of the woven fabric in at least one of the warp and weft directions is a substantially downwardly convex curve, where the elongation epsilon is in the range: 1% </= epsilon </= 20%; (B) where the elongation epsilon is in the range: epsilon </= 10%, the tensile strength S( epsilon ) of the woven fabric is 10 to 100 kg/3 cm in both the warp and weft directions; and (C) the woven fabric has a tensile toughness of 2,000 to 4,000 kg.%/3 cm in both the warp and weft directions, the tensile toughness being represented by an area of a region, in a graph showing a stress-strain curve of the woven fabric in each of the warp and weft directions, defined by the stress-strain curve and an abscissa corresponding to a stress of zero, is produced by weaving warp and weft yarns consisting of untwisted polyester filament yarns having a tensile elongation at break of 9 to 18% and a dry heat shrinkage of 3 to 13% at 150 DEG C, to provide a gray woven fabric having a tensile toughness of 1,000 kg.%/3 cm or more but not more than 2,000 kg.%/3 cm; and applying a shrinkage-setting treatment to the gray woven fabric optionally after scouring, while controlling the increases in both the warp and weft densities of the gray or scoured woven fabric to 5 to 25%, and the increase in elongation at break of the polyester filament yarns in both the warp and weft directions to 70 to 250%. <IMAGE></p> |
