Pvc-covered al foil polyterephthalate polycarbonate

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  • Publication Date: February 08, 1971
  • Publication Number: FR-1602896-A


Thermally insulated piping consisting of a pipe insulated with plastics, and an outer jacket are produced continuously by (a) placing a self-foaming plastic on a film half-surrounding the inner pipe, (b) coaxially closing the film around the inner pipe, (c) causing the plastic to foam, and (d) placing the outer jacket in position. The method enables thermally insulated piping to be produced continuously. The polyurethane foam can consist of a hard type foam, so that the insulating cover has additional strength.




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Cited By (2)

    Publication numberPublication dateAssigneeTitle
    US-7824595-B2November 02, 2010Perma-Pipe, Inc.Method and system for cast molding a fluid conduit
    WO-2006020615-A1February 23, 2006Perma-Pipe, Inc.Method and system for cast molding a fluid conduit