HEAT INSULATING MATERIAL AND COMPOSITE HEAT INSULATING MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a composite heat insulating material showing excellent heat insulating performance even for a heat insulating objective structure an external wall surface to arrange the heat insulating material on of which has irregularities as well as to use as a heat insulating and reserving material or a heat insulating cooling material in an extensive temperature region. SOLUTION: A heat insulating material 12 constituted by including a porous ceramic granular body and/or a hollow ceramic granular body 12b in a surrounding body 12a made of a metallic sheet or an inorganic fiber sheet so that a percentage of void in the surrounding body becomes 30-85% is made a lower side heat insulating element 16a, and a composite heat insulating material 10 constituted by laminating an upper side heat insulating material 16b on it is arranged on an external wall surface 100 of a heat insulating objective structure,.