| abstract |
Provided is a method for producing a vacuum insulation material having excellent thermal insulation properties even in high-temperature environments, and having excellent thermal insulation properties over long periods of time. n A core is produced by molding a core starting material composition, containing a talc-based clay mineral, a potassium compound and an organic solvent, into a predetermined shape to yield a core molded body, and firing the core molded body at a temperature that is lower than the melting point of the talc-based clay mineral. The core is vacuum-packaged with a gas-barrier packaging material, to thereby produce a vacuum insulation material. |