| abstract |
A polyvinyl acetal resin film for laminated glass, na viscosity of toluene/ethanol=1/1 (by mass ratio) solution of a polyvinyl acetal resin in a resin composition constituting the polyvinyl acetal resin film with a concentration of 10% by mass, measured at 30 rpm and 20°C by using a Brookfield-type (B-type) viscometer, being 100 to 1000 mPa ·s, nthe polyvinyl acetal resin film comprising a plasticizer in an amount of 0 to 20% by mass based on a total mass of the resin composition constituting the polyvinyl acetal resin film, nthe polyvinyl acetal resin film having a thickness of 10 to 350 µm, nthe polyvinyl acetal resin film exhibiting a mean spacing Sm value of unevenness of at least one side of 500 µm or more, and a ratio Sm/Rz of the mean spacing Sm value of unevenness to a value of ten-point average roughness Rz of at least one side of 200 or more. |