Polymer/Metal Laminate for Heat-Pipe and Radiator Envelopes

A thin polymer/metal laminate has been developed for use as an envelope material for lightweight heat pipes and heat-pipe radiators that operate at temperatures up to 360 K. The material is flexible enough to make it possible to roll or fold heat pipes compactly for transport and to unfurl them for use. The material is durable enough to withstand folding or rolling without incurring leaks. In addition, it is heat-sealable and thus an attractive alternative to metal heat-pipe envelope materials, which must be welded or brazed at temperatures much greater than those needed for heat sealing.