Thermoplastic resin film air bag

Abstract

An air bag comprises a facing sheet and a backing sheet of thermoplastic resin film and laminated on at least an outer peripheral joining region thereof with a thermoplastic resin film. An adhesion reinforcing layer(s) is interposed between the facing sheet and the backing sheet at the joining region and made from a thermoplastic resin provided that an insulating layer is interposed in the adhesion reinforcing layer at a region ranging from a position corresponding to an approximately center of the outer peripheral joining region toward the inside thereof. The facing and backing sheets and the adhesion reinforcing layer are heat-welded together at the outer peripheral joining region.

Dependencies are inferred from the claim text.