Valve multilayer film, Valve multilayer film tape, Packaging formed from Valve multilayer film, Method of forming a package with Valve multilayer film

摘要

A multilayer film comprising a valve is described. The multilayer film comprises an exterior layer and an interior layer. The interior layer comprises at least one aperture extending through the interior layer. A bonded portion and a non-bonded portion are between the interior layer and the exterior layer. The non-bonded portion comprises at least one channel and at least one passage. The at least one channel intersects the at least one passage at an angle greater than 0 degrees and less than 180 degrees, in one embodiment, the valve comprises the at least one aperture, the at least one channel and the at least one passage and provides for fluid communication from an outer surface of the interior layer to an atmosphere external to the multilayer film. The multilayer film may be provided as a web and may be used to form a variety of packages. Methods of manufacturing the film and methods of forming packages are also described.