Flow path sealing structure, bag-shaped container, and method of manufacturing the same

A bag-shaped container comprising:

• a peripheral edge sealed portion created by bonding a first resin sheet and a second resin sheet that are superimposed on each other;
• an accommodating section surrounded by the peripheral edge sealed portion;
• a flow path formed by bonding the first resin sheet and the second resin sheet, the flow path in communication with the accommodating section;
• and
• a flow path sealing structure disposed along the flow path, the flow path sealing structure comprising:
• a widened portion surrounded by a widened seal portion formed by bonding the first resin sheet and the second resin sheet around a periphery of the widening portion, the widening portion including a first end and a second end both in communication with the flow path, the widened portion wider than the flow path;
• and
• a weakly sealed portion formed to extend in a widthwise direction in the widened portion, and that partitions the widened portion in a liquid-tight and airtight manner into a first region on the first end and a second region on the second end, the weakly sealed portion configured to be opened by increasing an internal pressure of the widened portion, wherein a material of the first and second resin sheets that forms the weakly sealed portion is different from a material of the first and second resin sheets that forms the widened seal portion.