| 摘要 |
PROBLEM TO BE SOLVED: To obtain a polyester resin excellent in transparency, heat resistance, mechanical characteristics and smell retaining properties, useful as a container for foods and beverages and a packaging material. SOLUTION: This polyester resin has <=20 ppm liberated ethylene glycol content, <=70 ppm liberated monohydroxyethyl terephthalate content, <=100 ppm liberated bishydroxyethyl terephthalate content, <=150 ppm of the total amounts of the liberated monohydroxyethyl terephthalate content and the liberated bishydroxyethyl terephthalate content and <=350 ppm of a liberated bishydroxyethyl terephthalate dimer content and comprises an ethylene terephthalate unit as a main repeating unit. A sheetlike material and a blow molding product comprise the polyester resin. |
