| 摘要 |
To provide a bag-making method ensuring excellent liquid tightness at the melt-bonded part between the mouth member and the bag unit. A bag-making method for producing a bag by melt-bonding and thereby integrating a mouth member formed of a preliminarily heated synthetic resin and a bag unit formed of a flexible film, the method comprising a preliminary heating step of softening the synthetic resin of the mouth member at the part to be melt-bonded to the bag unit, melt-bonding part of mouth member, while preventing the synthetic resin of the mouth member at the end part in the bag side, end part of mouth member, from being softened at the preliminary heating step, and a step of inserting the preliminarily heated mouth member into the opening of the bag unit and pressing them by a sealing mold to melt-bond the melt-bonding part of the mouth member to the opening; and a medical container produced by the bag-making method.
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