| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a polyester resin which has been subjected to contact treatment with a mixed fluid of a supercritical fluid and an entrainer and has a reduced amount of oligomers such as a cyclic trimer and, simultaneously, a small residual amount of the entrainer in the resin and, as a result, inhibits the staining of a molding apparatus such as a mold on molding and, simultaneously, does not adversely affect the flavor of the content beverage when used as a battle and the like. <P>SOLUTION: The polyester resin has been subjected to contact treatment with a mixed fluid of a supercritical fluid and an entrainer, and has a residual amount of the entrainer in the resin of≤5 ppm. <P>COPYRIGHT: (C)2003,JPO</p> |
