Low permeability airbag and method
First Claim
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1. A method for manufacturing an airbag cushion, said method comprising the steps of:
- providing a pair of sheets made from a first substrate to serve as an inner layer of an airbag cushion;
providing a pair of sheets made from a second substrate to serve as an outer layer of an airbag cushion;
arranging said sheets of said first and second substrates in a stacked configuration so that said pair of sheets made from said first substrate are positioned between said pair of sheets made from said second substrate; and
attaching said first and second substrates together to form said airbag cushion having said inner layer substantially enclosed by said outer layer.
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Abstract
An airbag having low gas permeability characteristics. The airbag is formed from two separate layers of material, an inner layer having low air permeability and an outer strength layer enclosing the inner layer, where the layers are only attached together along seam lines. The inner layer is made from a film material, preferably urethane. The outer layer is formed from a fabric.
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Citations
8 Claims
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1. A method for manufacturing an airbag cushion, said method comprising the steps of:
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providing a pair of sheets made from a first substrate to serve as an inner layer of an airbag cushion;
providing a pair of sheets made from a second substrate to serve as an outer layer of an airbag cushion;
arranging said sheets of said first and second substrates in a stacked configuration so that said pair of sheets made from said first substrate are positioned between said pair of sheets made from said second substrate; and
attaching said first and second substrates together to form said airbag cushion having said inner layer substantially enclosed by said outer layer. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for manufacturing a multi-layer airbag cushion, said method comprising the steps of:
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providing an inner layer of material, said inner layer formed into a shape having a pocket for receiving and retaining gas under pressure;
providing an outer layer of material;
heat welding said inner layer to form chambers on an interior portion of said inner layer and disposing said inner layer within said outer layer;
enclosing said outer layer about said inner layer; and
attaching said outer layer to said inner layer within or adjacent to said heat welds forming said chambers. - View Dependent Claims (8)
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Specification