Insulation sheet, seat with backrest using the same, and winter clothes

摘要

The heat insulating sheet includes a first sheet, a first heat insulating material disposed on a main surface of the first sheet and having a first xerogel, and a second xerogel disposed on the main surface of the first sheet away from the first heat insulating material. And a second sheet disposed on the main surface of the first sheet so as to cover the first heat insulating material and the second heat insulating material. The elongation rate of the first region of the heat insulating sheet located between the first heat insulating material and the second heat insulating material as seen from the direction perpendicular to the main surface is based on the respective elongation rates of the first heat insulating material and the second heat insulating material. Is also big. This heat insulating sheet is unlikely to deteriorate in heat insulating performance.