| 摘要 |
A polytrimethylene terephthalate polyester which is composed mainly of trimethylene terephthalate repeating units, contains at least one compound selected from the group consisting of alkali metal compounds, alkaline earth metal compounds and manganese compounds in an amount of 10 to 150 ppm in terms of metal element(s), and satisfies the relationship (I): 0 <= P/M <= 1 (I) wherein P is the molar amount of phosphorus contained in the polyester; and M is the total molar amount of alkali metals, alkaline earth metals and manganese contained therein. |
