PROBLEM TO BE SOLVED: To provide the outer bag of an infusion bag constituted so as to certainly open an opening place by the hand.SOLUTION: The outer bag of the infusion bag, which has the insertion opening of the infusion bag provided to one side thereof and has an opening where two films are superposed one upon another provided to the other side thereof, includes at least two layers, that is, a sealant layer and a base material layer. The sealant layer comprises a heat sealing layer forming the innermost layer and the heat sealing layer is composed of a weak seal part and a strong seal part having seal strength higher than that of the weak seal part. In the opening, the strong seal parts are arranged to both side edges in the width direction of one side forming the opening, and the weak seal part positioned inside the bag and the non-heat sealing part positioned outside the bag are formed between the strong seal parts. An upper notch linearly slightly reaching the weak seal part in an execution form is formed to at least one end edge of the non-heat sealing part at the boundary of the strong seal part and non-heat sealing part of one side of the opening.COPYRIGHT: (C)2011,JPO&INPIT【課題】開封箇所を確実に,手で開封できるようにした輸液バッグの外袋を提供する。【解決手段】一辺に輸液バッグの挿入開口を有し,他辺に2枚のフィルムが重合される開封部を有する輸液バッグの外袋であって,少なくとも,シーラント層及び基材層の2層からなり,前記シーラント層は,最内層を成すヒートシール層から成り,前記ヒートシール層は,弱シール部と,前記弱シール部より高いシール強度を有する強シール部とから成り,前記開封部は,該開封部を成す一辺の幅方向両側縁に前記強シール部を配置し,該強シール部間に,袋内方に位置する弱シール部と,袋外方に位置する非ヒートシール部から成り,前記一辺の前記強シール部と前記非ヒートシール部の境界で,前記非ヒートシール部の少なくとも一方の端縁に,実施形態では,直線状に前記弱シール部にわずかに達する,上部ノッチを形成した。【選択図】図1
