OUTER BAG OF INFUSION BAG

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