Method of manufacturing before-use dissolution infusion bag

Abstract

Provided is a method of manufacturing a before-use dissolution infusion bag in which gas barrier performance of a cover sheet can be prevented from decreasing and a pressing strength required for dissolution before use can be maintained to be low. Provided is a method of manufacturing a before-use dissolution infusion bag, the method including: forming a chamber for sealing a content by performing, two or more times, a sealed portion forming step of laminating two resin sheets and bonding a part of the two resin sheets, in which a thickness difference present in the vicinity of a boundary between two sealed portions that are formed by different sealed portion forming steps and are in contact with each other is 50 μm or less, and a welding step of welding a cover sheet to a region including a boundary portion between the two sealed portions is provided.

Dependencies are inferred from the claim text.