| 摘要 |
PROBLEM TO BE SOLVED: To provide a copolyester resin in which hot adhesivity is high, and which is excellent also in wet heat durability. SOLUTION: The copolyester resin includes a dicarboxylic acid component, and a glycol component, wherein (i) the amount of copolymerization of an aromatic dicarboxylic acid is at least 60 mol% in the dicarboxylic acid component, (ii) the amount of copolymerization of a polyoxyalkylene glycol having 200-1,800 of a molecular weight is 1-30 mol% in the glycol component, (iii) the average molecular weight of a repeating unit is at least 230, and (iv) the glass transition temperature is higher than 30°C but at most 70°C. COPYRIGHT: (C)2012,JPO&INPIT |
