POLYESTER, PROCESS FOR PRODUCTION OF POLYESTER, AND POLYESTER MOLDED ARTICLE

摘要

Disclosed is a polyester produced from an aluminum compound and a phosphorous compound in the presence of a polycondensation catalyst. The polyester contains a polyester-insoluble, aluminum-containing contaminant in an amount of 1000 ppm or less as quantified by the method disclosed in the description, and contains an acid terminal group at a ratio of 10 to 50 eq/ton. The polyester can provide a highly transparent molded article produced through stretching (e.g., a film or hollow molded article) and is useful in the fields of highly transparent optical films, ultra-highly transparent molded articles or the like.