An air bag is made of thermoplastic urethane resin. The resin has a hardness (Shore scale A) of 88 to 92 measured by JIS K-7311; a tensile strength of 400 kg/cm.sup.2 or more measured by JIS K-7311; a breaking elongation of 400% or more measured by JIS K-7311; a 100% modulus of 70 kg/cm.sup.2 or more measured by JIS K-7311; a 300% modulus of 150 kg/cm.sup.2 or more measured by JIS k-7311; a tearing strength of 75 kg/cm or more measured by JIS K-7311; a pour point of 180.degree. C. to 188.degree. C. measured by Flow Tester; and a melting viscosity of 2.5.times.10.sup.5 Ps/190.degree. C. to 45.times.10.sup.5 Ps/190.degree. C. measured by Flow Tester.
An inflatable trim panel assembly (20) operable to provide a gas-filled cushion for protecting the vehicle occupant in an accident situation. The trim panel assembly (20) includes a support member (22), an elastic skin (24) attached to the periphery of the support member (22), and tethers (28) that are secured between the elastic skin (24) and the support member (22). The trim panel assembly (20) also includes an inflator (26) which, upon activation, supplies gas to the sealed area (30) between the elastic skin (24) and the support member (22) causing expansion of the elastic skin (24) and formation of an energy absorbing safety restraint cushion. The tethers (28) shape the elastic skin (24) so that the body of the vehicle occupant may be properly directed into the location for optimum safety restraint.
An airbag having at least two composite layers of fabric R.F. welded around the periphery thereof to form the bag and, which, when R.F. welded has excellent seam strength and a specific inflation strength less than 1.2.
