POLYGLYCOLIC ACID MOLDED ARTICLE, COMPONENT FOR DOWNHOLE TOOL, AND METHOD OF PRODUCING POLYGLYCOLIC ACID MOLDED ARTICLE

摘要

Problem:;To provide a molded article that has a thickness and that contains polyglycolic acid having high hydrolyzability without using a hydrolysis auxiliary agent.;Resolution means:;The polyglycolic acid having a content of low molecular weight substance of less than 1% by weight; and a molded article thereof having a thickness of 2 mm or greater, the time at which immersion of the molded article in water at 66° C. is started to the time at which the polyglycolic acid decomposed by the water starts to elute being 1 hour or longer but 30 hours or shorter, and a rate of embrittlement, at which embrittlement proceeds due to the elution of the polyglycolic acid, being 0.025 mm/h or greater.

主权项

1. A polyglycolic acid molded article comprising polyglycolic acid;
the polyglycolic acid having a content of low molecular weight substance of less than 1% by weight; the polyglycolic acid molded article having a thickness of 2 mm or greater, the time at which immersion of the polyglycolic acid molded article in water at 66° C. is started to the time at which the polyglycolic acid decomposed by the water starts to elute being 1 hour or longer but 30 hours or shorter, and a rate of embrittlement, at which embrittlement of the polyglycolic acid proceeds in a thickness direction from a surface part to a center part of the polyglycolic acid molded article due the elution of the polyglycolic acid, being 0.025 mm/h or greater.