PURPOSE: To produce gas-releasing woven fabric for resin-uncoated air bags of excellent mechanical properties, humid heat resistance and light resistance by using specific polyester fibers and weaving them in a specific range of the cover factor.
CONSTITUTION: Polyester yarns are produced, which are mainly composed of ethylene terephthalate units, and have higher than 0.8 intrinsic viscosity, over 9.0g/dl yarn strength, less than 15% elongation, more than 0.18 optical birefringence, higher than 1.38g/cm3 density, less than 280dl fineness and more than 3.6dl filament fineness. The polyester yarns are woven into plain fabrics, mat fabrics, twill fabrics of cover factor in the range of from 1270 to 1850, then they are scoured, heat-set, calendered to give the woven fabric for air bags uncoated with a synthetic resin.
NAKAGAWA KENJI
KURITA KAZUO
