PROBLEM TO BE SOLVED: To provide a medical vinyl chloride resin composition which is excellent in cracking resistance and discoloration resistance to radiation sterilization, in particular, γ-ray sterilization, is excellent in extrusion moldability, has no problem in an elution test required for a medical material, and accordingly can be suitably used for a medical instrument such as a medical infusion set, a joint member of a medical blood circuit, and a medical rigid container.SOLUTION: A medical vinyl chloride resin composition contains a component (a) of 100 pts.mass of a vinyl chloride resin, and a component (b) of 1 pt.mass or more and less than 20 pts.mass of a tetrahydro phthalic acid diester plasticizer.COPYRIGHT: (C)2015,JPO&INPIT【課題】放射線滅菌、特にγ線滅菌に対する耐亀裂性、耐変色性に優れ、射出成形性が良好であり、医療用材料に要求される溶出性試験において問題がなく、そのため医療用輸液セット、医療用血液回路のジョイント部材や医療用硬質容器などの医療用器具に好適に用いることのできる医療用塩化ビニル樹脂組成物を提供すること。【解決手段】成分(a)塩化ビニル樹脂100質量部、成分(b)テトラヒドロフタル酸ジエステル系可塑剤1質量部以上20質量部未満、を含有することを特徴とする医療用塩化ビニル樹脂組成物。【選択図】なし
