Basically this is for a glazed solar FLAT plate collector inclined at 45degrees.
Sag <10mm over 1m span. Can be held in tension.
R-value < 0.0005 I.e. I want more conductive than this.
I am trying to find a low cost (~$20USD/m2) material that is capable of surviving ~10years in an oxygenated hot water environment (70degC) with the material also able to survive occasional exposure to 140degC temperatures. i.e. An unpressurised solar collector application.
Material thickness...
