airbag fabric the uncoated fabric before the coating process was cut into a test specimen which was gripped in the lower stationary clamp of a tensile testing machine according to the astm d 5034 method while the upper clamp was moved upward to measure the tensile strength t 1 and the breaking elongation when the airbag fabric specimen was ruptured the fabric was measured in regard to warp and weft shrinkages according to the astm d 1776 method in the procedure the uncoated fabric before the coating process was cut into a test specimen lines marking a 20 cm of length in the warp and weft directions were made in the specimen fabric before shrinkage after one hour heat treatment in a chamber at 149 u00b0 c the lengths of the mark lines of the shrunk specimen fabric were measured to determine the warp and weft shrinkages as follows the uncoated fabric before the coating process was evaluated in regard to stiffness according to the astm d 4032 procedure circular bend test method using a stiffness testing machine the stiffness testing adopted the cantilever method where the stiffing testing machine used a test stand declined at a predetermined angle for bending the fabric to.