Expandable package for dispensing containers

摘要

Package has an outer sheet formed with pockets at least one of which contains one chemical component which reacts with another component contained in at least one of the other pockets. Further pockets contain additional chemicals which react with at least one of the other components to develop further dispensing pressure. - Another outer sheet seals off the pockets and a tape is positioned over the pocket openings and is secured to the second sheet. The tape is removed so that the peripheral seals around the pockets are progressively opened to allow contact between the chemical reactants. - Pref. the outer sheets are a polyethylene polypropylene composite with the polyethylene facing inwardly. The tape is pref. a polyethylene-polyester-polypropylene composite with the polypropylene facing the sheet.