Container for gas generating propellant

Claim 1

A container for a gas generating propellant comprising: an elongated thin wall metal cylinder having a plurality of perforations extending substantially around the periphery of the cylinder and for substantially the length of the latter; a hermetic liner sealingly attached to the imperforate portions of the inner surface of the cylinder to seal the perforated area of the wall; the hermetic liner comprising a laminated plastic film and metal foil composite having a thickness less than that of the cylinder wall and being rupturable under the pressure of gas generated within the cylinder; the laminated plastic film and metal foil composite including a first layer of an ionomer resin film, a layer of aluminum foil, a second layer of ionomer resin film, and a layer of polyester film; the first layer of ionomer resin film being in contact with the inner metal surface of the cylinder; the layer of aluminum foil being between the two layers of ionomer resin films; the layer of polyester film covering the second layer of ionomer film to isolate the latter from the gas generating propellant; and metal end caps closing the ends of the cylinder.