| 摘要 |
PROBLEM TO BE SOLVED: To provide a daylighting heat insulating material and a daylighting heat insulating plate having an excellent heat insulating property, a high transparency and lightweight while having less possibility of being cracked by heat. SOLUTION: The daylighting heat insulating material has a structure wherein a plurality of base films 1a, 1b, 1c are arranged facing to each other with a gas layer of a thickness of 100μm to 3 mm interposed therebetween while having a visible light transmissivity of 20% or more. At least one of the gas layers 2 is filled with low heat conductive gas having a thermal conductivity lower than that of air and is a low thermal conductive gas layer whose peripheral part is sealed. COPYRIGHT: (C)2008,JPO&INPIT
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