Method of manufacturing pouch container, pouch container, pouch container with cap, and double container with discharge mechanism

A method of manufacturing a pouch container, the method comprising:

• molding a mouth part member made of a resin, the mouth part member including a brim portion and a standing portion, wherein the resin of the mouth part member is the same as a resin of an outer resin layer of a first film, the resin being an olefin-based resin or an ester-based resin;
• attaching a lower surface of the brim portion of the mouth part member made of the resin to the outer resin layer of the first film, by integrating the resin of the mouth part member with the resin of the outer resin layer, using one of ultrasonic welding, heat welding, or high-frequency welding;
• forming a pouch bag having one open end, by fusion-bonding a resin layer on an inner side of an end of the first film, with a resin layer on an inner side of an end of one or more second films, wherein each of the first film and the one or more second films has a structure comprising three or more layers including an outer resin layer forming an outer surface, an inner resin layer forming an inner surface, and a metal layer or an inorganic layer sandwiched between the inner and outer resin layers;
• filling the pouch bag with contents from the one open end of the pouch bag;
• and
• sealing an inside of the pouch bag by fusion-bonding the one open end of the pouch bag to close the pouch bag.

A method of manufacturing a pouch container, the method comprising:

• folding and fusion-bonding an inner resin layer of an end of a film, to form a pouch bag having one open end, wherein the film has a structure comprising three or more layers including an outer resin layer forming an outer surface, an inner resin layer forming an inner surface, and a metal layer or an inorganic layer sandwiched between the inner and outer resin layers;
• molding a mouth part member made of a resin, the mouth part member including a brim portion and a standing portion, wherein the resin of the mouth part member is the same as a resin of the outer resin layer of the film, the resin being an olefin-based resin or an ester-based resin;
• attaching a lower surface of the brim portion of the mouth part member made of the resin, to the outer resin layer of the film of the pouch bag, by integrating the resin of the mouth part member with the resin of the outer resin layer, using one of ultrasonic welding, heat welding, or high-frequency welding;
• filling the pouch bag with contents from the one open end of the pouch bag;
• and
• sealing an inside of the pouch bag by fusion-bonding the one open end of the pouch bag to close the pouch bag.