Concept for High-Low Temperature Resistance Arrangement within Multilayer Flexible Composite Materials

Abstract

The multilayer flexible composite (MFC) materials are extensively used in space environment, polar environment, volcano adventure, and so on as light weight insulation protection systems between room (20 ± 2°C) and high (150 ± 5°C)-low (-110 ± 5°C) operating temperature. A new concept for high-low temperature resistance arrangement is presented in this article considering heat load contributions. The main advantages of this concept consist of the structure of the materials and the choice of spacers. The structure of the MFC material consists of outer fabric, inner fabric, and a number of thin shields separated by spacers. The thermal properties of multilayer reflecting shields with different thickness of reflecting shields, different layers, different combination structures, different spacers, and different contact states were discussed in this article. The reflecting shield (6 µm polyester film + 0.03 µm aluminum film + 8 µm polyester film) is the most ideal, and polyester mesh (down added into the mesh) is the most effective spacer with thermal insulation close to the ideal condition. Finally the thin shields and spacers are chosen, and then the optimal structure of the MFC materials is obtained with respect to insulation thickness and flexibility of the material.