Low permeability fabric, airbag made of same and method of making same

摘要

An airbag includes a bag made of a strong, lightweight, thin, flexible fabric of low permeability comprising an uncoated woven cloth characterized by a permeability of not more than one cubic foot of air per minute per square foot of cloth (0.5 cm3/sec/cm2) at a pressure drop of 0.5 inch of water (1.27 cm) across the cloth. The cloth is calendered on both sides to reduce its permeability. The airbag may additionally include a finish of low thermal conductivity disposed on at least the surface of the cloth forming the interior of the bag.