The invention relates to a method of manufacture of a composite product including
at least one layer of reinforced woven material and at least one layer of PTFE
foil or ePTFE foil, where the foil or foils are laminated together with the layer
or layers of woven material under the use of heating and pressurizing, where the
composite material subsequently is cooled to a fully or partly fixed state. According
to a preferred embodiment the composite is fixated by means of one or two cooperating
pressure surfaces under a relative high pressure. By the invention a form stable
composite material having a considerable enhanced E-modulus is achieved.