PROBLEM TO BE SOLVED: To provide a medical three-way cock that has following remarkably useful points: suppression of hydrolysis under a high-temperature humid condition such as in a steam sterilization suppression of losing of clarity (whitening) and deterioration of various physical properties such as a mechanical property that may occur caused by hydrolysis when sterilized in the steam sterilization and retention of clarity and various physical properties such as mechanical physical property even if soaked and left in hot water.SOLUTION: A medical three-way cock is provided by molding a molding material whose essential component is polycarbonate, a content of phosphorous element P in the molding material being 20 μg/g or less.COPYRIGHT: (C)2015,JPO&INPIT【構成】 ポリカーボネートを必須成分とする成形材料であって、該成形材料中のリン元素Pの含有量が20μg/g以下である成形材料を成形してなることを特徴とする、医療用三方活栓。【効果】本発明の医療用三方活栓は、蒸気滅菌等の高温多湿条件における加水分解が抑制され、蒸気滅菌手法による殺菌をした場合に起こり得る加水分解による失透(白化)及び機械的性質等の諸物性劣化が抑制され、また、熱水中に浸漬放置された場合でも透明性や機械的物性等の諸物性を保持するものであり極めて有用である。【選択図】 なし
