| abstract |
Provided is a polyvinyl acetal film which, when used as an interlayer for a laminated glass, can provide a laminated glass that exhibits a low degree of yellowness and excellent surface appearance, and which is thus useful as a sealing material or interlayer that can prolong the life of a laminated glass provided with either a solar cell or a functional unit. Further, the content of corrosion-causing substance in the polyvinyl acetal film is very low, so that the polyvinyl acetal film permits high-temperature lamination and thus ensures excellent productivity. Also provided are a solar cell module and a laminated glass which are made using the polyvinyl acetal film. A plasticized polyvinyl acetal film which comprises 100 parts by mass of a polyvinyl acetal resin and 15 to 60 parts by mass of a plasticizer that has a total number of molecule-constituting carbon and oxygen atoms of 28 or more and which has an acid value of 5.0meq/kg or less. |