Plastic pouch and manufacturing method therefor

摘要

At least one of an obverse surface film and reverse surface film, which are used to together constitute a plastic pouch, is folded back across the entire width of the plastic pouch, and peripheral edge portions of the pouch are heat-sealed, to thereby form, on at least one position, a folded-back section communicating with the body of the pouch.

主权项

1. A method for manufacturing a plastic pouch including a widthwise folded-back section provided on at least one position of an obverse surface member and reverse surface member in communication with an interior of the plastic pouch, peripheral edge portions of the pouch being heat-sealed, and opposite widthwise ends of said folded-back section, located outwardly of sealed portions of said folded-back section, being fixed to said obverse surface member or said reverse surface member,
characterized in that said method comprises forming said folded-back section by folding one portion of at least one of said obverse surface member and said reverse surface member so two inner surface member portions are sandwiched between said obverse surface member and said reverse surface member, and fixing said surface members between said obverse surface member and said reverse surface member wherein the opposite widthwise ends of said folded-back section, located outwardly of the sealed portions of said folded-back section, are fixed, by forming holes in two portions of the surface members sandwiched between said obverse surface member and said reverse surface member and then heat-sealing the opposite widthwise ends, and said obverse surface member and said reverse surface member being film laminates having an inner surface with a thermal adhesive capability on said inner surface.