| 摘要 |
PROBLEM TO BE SOLVED: To provide a multiple glass with a simple structure having the total thickness of ≤25.0 mm and thermal transmittance of ≤3.50 W/m<SP>2</SP>K, and also passes the sound insulation class T-3 according to JIS A4706:2000. SOLUTION: There is a multiple glass where three glass plates G1, G2, G3 are separately arranged, respectively, so as to provide two hollow layers 1, 2, air is sealed into either of the two hollow layers, helium is sealed into the another, the thickness of the two glass plates on both the sides composing the multiple glass and the thickness of the two hollow layers are symmetrical viewed from the glass plate at the inside, the thickness of the glass plate G2 at the inside and the thickness of the two glass plates G1, G3 on both the sides are different, and the total thickness of the multiple glass is 18.0 to 25.0 mm. COPYRIGHT: (C)2010,JPO&INPIT
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