Aromatic polyester and method for producing same

A process, comprising a step of conducting low-temperature melt polycondensation at 80 to 150° C. to produce an aromatic polyester comprising a polycarboxylic acid component and a polyhydric alcohol component as a copolymerization component, wherein,

• the aromatic polyester comprises a polycarboxylic acid component having an operative functional group by 50 mol % or more when a total amount of the polycarboxylic acid component is taken as 100 mol %,
• the aromatic polyester comprises an aromatic polyhydric alcohol component by 50 mol % or more when a total amount of the polyhydric alcohol component is taken as 100 mol %,
• the aromatic polyhydric alcohol component is an aromatic diol compound, a glycol-modified aromatic diol compound, or a glycol-modified aromatic dicarboxylic acid, wherein the glycol-modified aromatic diol compound is at least one selected from the group consisting of an ethylene oxide adduct of 1,2-phenylene glycol, a propylene oxide adduct of 1,2-phenylene glycol, an ethylene oxide adduct of 1,3-phenylene glycol, a propylene oxide adduct of 1,3-phenylene glycol, an ethylene oxide adduct of 1,4-phenylene glycol, a propylene oxide adduct of 1,4-phenylene glycol, an ethylene oxide adduct of naphthalenediol, a propylene oxide adduct of naphthalenediol, an ethylene oxide adduct of bisphenol A and a propylene oxide adduct of bisphenol A, and
• the aromatic polyester comprises fluorine by 500 mass ppm to 4,200 mass ppm, and sulfur by 250 mass ppm to 2,397 mass ppm.