POROUS PLATE-SHAPED FILLER, COATING COMPOSITION, HEAT-INSULATING FILM, AND HEAT-INSULATING FILM STRUCTURE

摘要

Provided are a heat-insulating film and a heat-insulating film structure with improved heat insulating effects. Also provided are a porous plate-shaped filler included in the heat-insulating film and a coating composition for forming the heat-insulating film. In a heat-insulating film 3 of the present invention, porous plate-shaped fillers 1 are dispersedly arranged in a matrix 3m for binding the porous plate-shaped fillers 1. In the heat-insulating film 3, the porous plate-shaped fillers 1 are preferred to be arranged (stacked) in a layered state. The porous plate-shaped filler 1 is a plate with an aspect ratio of 3 or more, and has a minimum length of 0.1 to 50 µm and a porosity of 20 to 99%. The heat-insulating film 3 using the porous plate-shaped fillers ensures a longer length of heat transfer path compared with the case where spherical or cubic fillers are used. Accordingly, the thermal conductivity can be reduced.