Bag type package for protecting and persevering agri-food product, has rails and joints cooperated between them to form seal with gases or liquids when conditions of package are in pressure or depression when package is in closed position

摘要

The package has open/close device (1) with an obturation unit (2) that is used as a barrier to prevent gaseous and/or liquid exchange between indoor and external environments of the package. The unit has interlocking elements (3, 4), where each element has tubular joints (7, 8) made of thermoplastic material and disposed between complementary male and female rails (5-1, 5-2, 6-1, 6-2). The rails and the joints are cooperated between them to form a closing seal with gases and/or liquids when internal conditions of the package are in pressure or depression when the package is in closed position. POLYMERS - The rails are made of polyethylene and/or polypropylene. One joint is made of elastomer-thermoplastic.