| abstract |
The present invention provides a copolyester resin that has particularly good adhesion under a long-term high-temperature and high-humidity environment, and that can be laminated under low-temperature conditions. A copolyester resin composed of a carboxylic acid component and a glycol component, (I) Among the carboxylic acid components, the copolymerization amount of the aromatic dicarboxylic acid is 60 mol% or more, (Ii) Among the glycol components, the copolymerization amount of polyoxyalkylene glycol having a molecular weight of 200 to 1800 is more than 30 mol% and 70 mol% or less, (Iii) The average molecular weight of the repeating unit is 400 or more, (Iv) Copolyester resin having a glass transition temperature of −10 ° C. or lower. [Selection figure] None |