Image Number 4 for United States Patent #6235661.
Heat, pressure, and glue are used to form a composite material in which a layer of U.S. Coast Guard approved flotation foam is located between a pair of fabric layers which are glued to the foam layer. The process of bonding the fabric layers to the foam layer is accomplished using both heat and pressure whereby a fabric covered, foam composite structure is provided. In a preferred embodiment, a flotation foam of the type which can be included in the calculation of flotation for a U.S. Coast Guard approved PFD is used, so the composite material can be used both as a fabric and as flotation in a U.S. Coast Guard approved PFD.
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