| abstract |
PROBLEM TO BE SOLVED: To efficiently produce a molded body, particularly a heat-resistant hollow molded body having excellent transparency, moderate and stable crystallization speed, excellent heat-resistant dimensional stability, and preventing emission of fluorescence when irradiated with ultraviolet rays. It is possible to provide a polyester and a polyester composition comprising the same which can provide a packaging material which can be used and has excellent long-term continuous moldability with little mold fouling and excellent flavor retention. SOLUTION: A polyester composition mainly comprising a polyester A obtained from a terephthalic acid component and a glycol component, and a polyester B obtained by heating and molding the polyester A, and the fluorescent emission of the polyester A and / or polyester B A polyester composition having a strength of 20 or less. |