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VA: Vakuumphysik und Vakuumtechnik

VA 1: Vakuumverfahrenstechnik

VA 1.3: Talk

Monday, March 8, 2004, 10:30–10:50, H47

Barrier films for vacuum insulation panels (VIP) — •Dirk Kaczmarek — Wipak Walsrode GmbH & Co. KG, Postfach 1661, 29656 Walsrode

Barrier films for vacuum insulation panels were used since a long time in the market of refrigerator. On one side the energy-efficiency-class will be extend to A+ and A++ in the next year and on the other side the energy saving in the field of buildings will become more and more important. These applications require a higher insulation like the VIPs. The VIPs based on multi layer films which surround a core that can consist of different materials. To realize a high level of insulation the VIP need an internal pressure of 1 mbar. From there, the main focus of the barrier films is, to keep this pressure as low as possible over years but the heat conductivity has to be low as well. The company Wipak offers since several years films for the production of vacuum insulation panels. In this paper the requirements (e.g. influence of oxygen permeation) to a barrier film will be discussed as well as the different solutions will be presented (e.g. thickness of the metallization).