| 摘要 |
PROBLEM TO BE SOLVED: To shut off the transmission of heat as far as possible with no isolation between the front and rear of a thermally transmissible building material such as aluminum or without using building materials in a plurality of layers so as to restrain heat-transmission. SOLUTION: A heat-insulating composite sheet 1 has a filler 2 which is made of a foamed sheet, fibers, a porous material or particles and having a density of 0.005 to 1 g/cm3 and which is located in a sealed package bag 3 made of a flexible sheet, and has micro pores having a diameter of 1 nm to 1 mm, being preferably depressurized or vacuumed in the inside thereof. This composite sheet 1 is highly heat-insulatable, and is strong against the compression, and accordingly, can exhibit a satisfactory heat-insulation which is prevented from being deteriorated with time. Thus, it can be optimumly used for a building material or a packing material.
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