| abstract |
An object of the present invention is to provide a polyester film having excellent dimensional stability to temperature and humidity. n The present invention is a polyester containing a dicarboxylic acid component and a diol component, whereinn (i) the dicarboxylic acid component contains not less than 5 mol % and less than 50 mol % of a recurring unit represented by the following formula (A) and more than 50 mol % and not more than 95 mol of a recurring unit represented by the following formula (B): nn n n n n n n n n n wherein R A is an alkylene group having 2 to 10 carbon atoms, n n n n n n n n n n wherein R B is a phenylene group or naphthalenediyl group; andn (ii) the diol component contains 90 to 100 mol % of a recurring unit represented by the following formula (C): nn —O—R C —O— (C) n wherein R C is an alkylene group having 2 to 10 carbon atoms, and a film comprising the same. |