Thermally insulating material and process for its manufacture

摘要

A heat insulating material (1) includes a heat insulating layer (10) which has a porous structural body, a reinforcing fiber and nanoparticles of a metal oxide which are used as a binder, the porous structural body having a skeleton formed by connecting a plurality of particles is formed, has pores in the interior and has a hydrophobic portion on at least one surface between a surface and an inside of the porous structural body. The heat insulating layer (10) has a mass loss rate of 10% or less in a thermogravimetric analysis held at 500 ° C. for 30 minutes.