Abstract: A polyester resin composition containing a polyester resin and 1 to 500 ppm of ultramarine based on a total amount of the polyester resin composition, wherein the polyester resin contains dicarboxylic acid structural unit and diol structural unit, the diol structural unit contain structural unit derived from a diol having a cyclic acetal skeleton, and a content of the structural unit derived from a diol having a cyclic acetal skeleton is 1 to 60 mol % based on a total amount of the diol structural unit.

Abstract: A polyester resin composition containing a polyester resin and 1 to 500 ppm of ultramarine based on a total amount of the polyester resin composition, wherein the polyester resin contains dicarboxylic acid structural unit and diol structural unit, the diol structural unit contain structural unit derived from a diol having a cyclic acetal skeleton, and a content of the structural unit derived from a diol having a cyclic acetal skeleton is 1 to 60 mol % based on a total amount of the diol structural unit.

Abstract: One embodiment of the present invention provides: a thermoplastic resin composition which contains a polycarbonate resin and a polyester resin that contains a diol unit having a cyclic acetal skeleton, and wherein the polyester resin contains specific amounts of phosphorus atoms and titanium atoms and the weight ratio of the phosphorus atoms to the titanium atoms is within a specific range; and a molded body which uses this thermoplastic resin composition.

Abstract: A resin-made multilayer molding includes two or more resin layers, at least one resin layer is configured from a mixed resin (B) containing, at a ratio (C)/(D)=99/1 to 10/90 by weight, a polyamide resin (C) obtained by polymerizing a diamine component containing 70 mol % or more of m-xylylenediamine and a dicarboxylic acid component containing 70 mol % or more of adipic acid, and a polyester resin (D) containing a dicarboxylic acid unit and a diol unit, 1-80 mol % of the diol unit having a cyclic acetal skeleton; and at least one resin layer in contact with a layer configured from the mixed resin (B) is configured from a resin containing 70 wt % or more of a thermoplastic polyester resin (A) obtained by polymerizing a dicarboxylic acid component containing 80 mol % or more of terephthalic acid and a diol component containing 80 mol % or more of ethylene glycol.