Va-Q-Tec Ag

Stefan Roth

Jochen Hiemeyer

Roland Caps

Sebastian Gralla

A sheet material for thermal insulation, comprising a flat core of an open-pored material having two parallel extending surfaces, and a circumferential region inter-connecting the surfaces; a first barrier film in contact with a first surface of the core and comprising a sealing layer, and a fully circumferential protrusion of the first barrier film; a flat filter material in contact with a second surface of the open-pored core and disposed oppositely first barrier film and providing a fully circumferential protrusion a second barrier film in contact with the outer face of the flat filter material and comprising at least one sealing layer facing the flat filter material, and a fully circumferential protrusion of said second barrier film; a sealing seam extending circumferentially along the protrusion of the two films and fixing the two films to each other; wherein the filter material is welded circumferentially into the sealing seam, and wherein the volume between the two barrier films and the sealing seam is sealed and evacuated; and method for producing the insulation sheet.

Evacuated sheet material for thermal insulation

A vacuum insulated panel comprises a filler and a vacuum-tight high-barrier film envelope, with an air-permeable sheet element that serves as a filter material for dust, wherein the sheet element consists of the same material as the sealing layer of the high-barrier film enveloping the vacuum insulated panel and passes through the sealing seams of the high-barrier film, and to a method for producing such a vacuum insulated panel, wherein the sheet element, in the form of a strip preferably folded along a central axis, is placed between two sealing films and is thermally adhesively bonded to the inwardly disposed sealing layers of the sealing films such that a joint is formed between the two sealing films which are sealed together by means of a respective seam on each of perpendicular sides, the strip-shaped sheet element being co-sealed into the seams.

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Margetshöchheim, Germany

Stefan Roth