PROBLEM TO BE SOLVED: To provide a medical bag for holding a chemical liquid, blood or the like which has high sanitary properties and is excellent in pliability and transparency, in resistance to pinholes and also in heat resistance and a dropping strength.SOLUTION: The present laminate comprises an outer layer, an intermediate layer and an inner layer in this sequence and these layers are formed of resin materials constituted of a constituent A: a polypropylene-series resin and a constituent B: an ethylene/&alpha-olefin copolymer of which the value of H/W is 1.8 or above when the height of the maximum peak of a TREF elution curve is denoted by H and the width of the peak at 1/3 of the height by W in the conditions that MFR=0.1-20 and that the temperature at the maximum peak is 25-92°C. The outer layer is formed of the resin material prepared by compounding the constituent (B) of 0-85 wt.% to the constituent (A) and the intermediate layer is formed of the resin material prepared by compounding the constituent (B) to be more than the amount compounded in the outer layer and 25-95 wt.% thereto, while the inner layer is formed of the resin material constituted of the constituent (A). The laminate thus constituted is used for the medical bag or the like.COPYRIGHT: (C)2002,JPO【課題】 衛生性が高く、柔軟性及び透明性に優れ、耐ピンホール性にも優れ、かつ耐熱性及び落袋強度についても良好な、薬液、血液等を収容する医療用袋を提供することを課題とする。【解決手段】 成分A:ポリプロピレン系樹脂と、成分B:MFR=0.1~20でTREF溶出曲線の最大ピークの温度が25~92℃で該ピークの高さをH、その3分の1の高さにおける幅をWとしたときH/Wの値が1.8以上であるエチレン・α-オレフィン共重合体とからなる樹脂材料により形成される外層、中間層及び内層をこの順で含み、外層は成分(A)に対して成分(B)を0~85重量%配合してなる樹脂材料で形成し、中間層は、成分(B)を外層での配合量以上であって25~95重量%となるように配合してなる樹脂材料で形成し、内層は成分(A)からなる樹脂材料で形成して積層体とし、医療用袋等に用いる。
