COATED WOVEN FABRIC
The objective of the present invention is to provide a woven fabric that is for an airbag, is a lightweight woven fabric having a low amount of resin coating film, suppresses high pressure air permeability after the passage of time, has superior stability of characteristics after sewing processing, and has superior gas leakage suppression of the sewn section. This woven fabric for an airbag comprises a synthetic fiber at which a resin has been disposed, and is characterized in that in the heating DSC heat-absorption curve of the woven fabric, the ratio of the high-temperature endotherm with respect to the overall endotherm is over 45% of the peak temperature of the melt endotherm in the heating DSC heat-absorption curve of the thread configuring the woven fabric.
1 . A woven fabric comprising synthetic: fibers in which a resin has been disposed, wherein in a rising-temperature DSC endothermic curve of the woven fabric, the ratio of the endothermal quantity absorbed on the high-temperature side of the peak temperature of the melting endotherm in the rising-temperature DSC endothermic curve of the constituent yarn of the woven fabric, to the overall heat absorbed exceeds 45%.
2 . The woven fabric according to claim 1 , wherein the ratio of the endothermal quantity absorbed on the high-temperature side of the peak temperature of the melting endotherm in the rising-temperature DSC endothermic curve of the constituent yarn of the woven fabric, to the overall heat absorbed exceeds 50%.
3 . The woven fabric according to claim 1 or 2 , wherein the resin is disposed as a coating film in the woven fabric, the resin amount being 10 to 50 g/m 2 .
4 . The woven fabric according to any one of claims 1 to 3 , wherein the oil adhesion rate is 0.005 to 0.20 wt. %.
5 . The woven fabric according to any one of claims 1 to 4 , wherein the difference between the flatnesses of the warp yarn and weft yarn constituting the woven fabric (spread of filaments in planar direction/spread of filaments in thickness direction) is 1.8 or lower.
6 . The woven fabric according to any one of claims 1 to 5 , wherein the peel resistance is 200 times or greater, in a scrubbing test after 100 hours of exposure to an environment of 95% RH, 85° C.
7 . The woven fabric according to any one of claims 1 to 6 , wherein the stitch air permeability increment is 1.000 mm 3 /mm/sec or less after 100 hours of exposure to an environment of 95% RH, 85° C.
8 . The woven fabric according to any one of claims 1 to 7 , wherein the synthetic fiber is polyamide 66 fiber.
9 . The woven fabric according to any one of claims 1 to 8 , wherein the air tangling of the synthetic fiber used for weaving is 5 to 30 times/m.
10 . The woven fabric according to any one of claims 1 to 9 , which is produced by a step including weaving non-twisted, non-sized synthetic fiber with a water jet loom, and then scouring it at no higher than 70° C.
11 . The woven fabric according to any one of claims 3 to 10 , wherein the resin is a silicone resin, and the resin coating film is disposed by a solventless silicone resin-containing coating fluid with a viscosity of greater than 20,000 cP and less than 500,000 cP.
12 . The woven fabric according to claim 11 , wherein the coating solution contains 1 to 10 wt % of a low-molecular-weight alkoxysilane having a molecular weight of 500 or lower.
13 . The woven fabric according to claim 11 or 12 , wherein the silicone resin contains no greater than 45 wt % of low-viscosity silicone of 10,000 cP or lower.
14 . The woven fabric according to any one of claims 1 to 13 , which undergoes heat contraction of 1.5% or greater due to crosslinking of the resin.
15 . An airbag employing the woven fabric according to any one of claims 1 to 14 .