| 摘要 |
By controlling the electrical conductivity of a diol composition, a polyester material, at 0.6 mS/m to 30 mS/m, and, preferably, controlling the pH of the diol composition at 5 to 7.5, the thermal weight loss rate of a polyester is reduced, and, consequently, a polyester with improved mechanical properties and molding stability as well as excellent color tone is provided. |
