PROBLEM TO BE SOLVED: To provide a propylene-based resin composition that satisfies standards of general tests in Japan Pharmacopoeia and has excellent heat resistance, rigidity, shock resistance, injection molding property, transparency and gas barrier property, and to provide a molded article of the composition.SOLUTION: A medical propylene-based resin composition is disclosed, which is characterized in that 0.01 to 0.6 part by weight of a nucleating agent (A) expressed by a specified structural formula, or together with other nucleating agents, is compounded into 100 parts by weight of a polymer mixture comprising (a) 60 to 99 parts by weight of a propylene homopolymer having a melt flow rate of 2 to 80 g/10 min at 230°C under a load of 2.16 kg and (b) 1 to 40 parts by weight of polyethylene having a melt flow rate of 1 to 60 g/10 min at 190°C under a load of 2.16 kg and having density of 0.860 to 0.940 g/cm3.COPYRIGHT: (C)2009,JPO&INPIT【課題】日本薬局方、一般試験の規格を満足し、優れた耐熱性、剛性、耐衝撃性、射出成形性、透明性、ガスバリヤー性を有するプロピレン系樹脂組成物およびその成形品を提供する。【解決手段】(a)230℃、2.16kg荷重におけるメルトフローレートが2~80g/10分であるプロピレン単独重合体60~99重量部と、(b)190℃、2.16kg荷重におけるメルトフローレートが1~60g/10分、密度が0.860~0.940g/cm3であるポリエチレン1~40重量部とからなる重合体混合物100重量部に対して、特定の構造式の造核剤(A)が0.01~0.6重量部、または他の造核剤と併用して配合されていることを特徴とする医療用プロピレン系樹脂組成物。【選択図】なし
