| abstract |
(57) Abstract: An acid component is 2,6-naphthalenedicarboxylic acid, and ethylene glycol and 1,4-cyclohexanedimethanol are used as glycol components in a molar ratio of ethylene glycol / 1,4-cyclohexanedimer. Molding characterized by comprising a polyester copolymer containing methanol in a ratio of 99/1 to 60/40 and copolymerizing polytetramethylene glycol in an amount of 0 to 5% by weight with respect to the polyester copolymer. body. [Effect] It has excellent hydrolysis resistance, heat resistance, and transparency. |