Evacuated sheet material for thermal insulation

US9321237B2 · kind B2 · utility

Assignee

• va-Q-tec AG · DE

Inventors

• Jochen Hiemeyer · Karlstadt, DE
• Roland Caps · Kleinwallstadt, DE
• Stefan Roth · Västerås, SE

Key dates

• Filing date: May 2, 2011
• Grant date: Apr 26, 2016
• Expiry date: Jul 14, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/231
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

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.