| abstract |
【Task】 This invention makes it a subject to improve heat insulation, without impairing transparency, the adhesiveness with glass, and the penetration resistance when it is set as a laminated glass of the sheet | seat made from polyvinyl acetal resin. [Solution] 100 parts by weight of polyvinyl acetal resin consists plasticizer range from 1 to 50 parts by weight, bubbles having an average diameter of 0.01 to 100 [mu] m, a sheet 0.1～0.9Cm 3 contains per 1 cm 3. The sheet of the present invention can improve the heat insulation of the sheet itself by the bubbles contained in the sheet, and further, by specifying the average diameter of the bubbles, transparency, adhesion to glass, laminated glass The penetration resistance is maintained. [Selection figure] None |