Brugg Rohr Ag Holding

Christian Dambowy

Jürgen Kress

Roberto Rudi

Alfred Oeschger

Juergen Kress

Jurgen Kress

Antonino Chiavello

The invention relates to a thermally insulated conduit pipe, comprising at least one medium pipe, at least one thermal insulation arranged around the medium pipe, and at least one outer jacket arranged around the thermal insulation, wherein the outer jacket possibly comprises a barrier made of plastic, and wherein the thermal insulation comprises a foam, the cell gas of which contains at least 10 vol % HFOs. Such conduit pipe has good insulating behavior, good environmental balance, and is easily producible.

Thermally insulated medium pipes having HFO-containing cell gas

For manufacturing composite parts () having an inner hollow moulded body () with openings (), which are accessible from outside, the moulded body is introduced into a moulding tool on the mould walls on which a shell layer () was applied. The hollow space between the moulded body () and the shell layer () is filled with a thermally insulating plastic foam () which is foamed in the moulding tool and bonds to the moulded body and the shell layer. After removal, a moulded body is provided, which has a qualitatively good surface formed by the shell layer. Such a composite part is preferably used for connecting thermally insulating pipes.

Method for manufacturing a composite part and use thereof

A flexible heat-insulated conduit is described, made up of at least one medium-carrying internal tube, an external tube surrounding the at least one internal tube, and a heat-insulating layer based on polyurethane foam or polyisocyanurate foam and located between the at least one internal tube and the external tube, in which 0.1 to 7.5% by weight of hollow spheres are added into the foam, the hollow spheres comprising a casing made of a thermoplastic and being filled with a medium that brings about an inflation of the casing at an elevated temperature.

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Gebenstorf, Switzerland

Christian Dambowy