Abstract: 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.

Abstract: An expansion joint for high temperature air or other gaseous flows, of the type in which two duct ends are separated by a gap, that is bridged by a flexible fabric expansion joint cover. The flexible fabric expansion joint cover is attached to the duct ends, using two outwardly extending frame members. Each frame member incorporates one or more convolutions, that are provided to accommodate thermally inducted stresses and strains, imposed by the thermal gradient through the frame members, from positions proximate the duct ends, to outwardly disposed locations where the frame members are attached to opposing ends of the fabric cover.