Patent attributes
A packaging material web stock is provided. The packaging material web stock can include first and second plies overlaid and sealed to each other at a plurality of seals that include a plurality of transverse seals extending transversely across the plies, wherein a plurality of interior cavities are defined between the plies and the transverse seals, the first and second plies arranged in a web that includes a plurality of packaging units arranged longitudinally in a series along the web, wherein the first and second plies form walls of the packaging units, and at least some of the packaging units include at least one of the interior cavities, and an expansion material disposed in the interior cavities in an unexpanded configuration, wherein the expansion material is arranged within the inner cavities such that, when expanded to the expanded configuration, the expansion material is configured to provide cushioning in the walls.
