FLEXIBLE FOOD BAG

摘要

The present invention provides a food storage and preparation bag (10) comprising at least one sheet of flexible sheet material assembled to form a semi-enclosed container having an opening defined by a periphery and a closu re means (30) for sealing the opening to convert the semi-enclosed container to a closed container. The opening defines an opening plane and the sheet materia l includes a first region (50) and a second region (40) being comprised of the same material composition. The first region undergoes a substantially molecular-level deformation and the second region initially undergows a substantially geometric deformation when the sheet material is subjected to an applied elongation along at least one axis. The first region and the second region are visually distinct from one another, wherein the second region includes a plurality of raised rib-like elements (74) and the first region i s substantially free of rib-like elements.