A multilayer foam film with an enhanced perceived surface whiteness comprising for light-blocking, signage, and general packaging application is disclosed. In an embodiment, the film has a bulk density of less than 0.962 gr/cm.sup.3 wherein more than 50% of the cells in the foam layer are closed cells. In an embodiment, the multilayer foam film has a thickness greater than 1 mil and one of the solid skin layers contains white pigment. In another embodiment the white skin layer has a skin whiteness value of greater than 80 according to ASTM E313-73, and a skin layer tint value of less than 1 according to ASTM E313-73, and The lightness value (L*) of the white skin layer of greater than 90 in CIE L*a*b* dimension according to ASTM E308. In an embodiment, the film has a very smooth surface with a smoothness value of less than 25 in Sheffield smoothness unit configuration according to TAPPI T 538.

A protection sheet is to be attached to a press through package that includes a sheet-shaped container including storing portions and a cover that seals the storing portions. The protection sheet includes a resin layer and a first adhesive layer. The resin layer is releasable from the press through package and includes slits from which the resin layer starts to be released. The first adhesive layer is bonded to the resin layer such that a surface of the first adhesive layer that is an opposite side from the resin layer is to be bonded to the cover.

A lid, a container with a lid, and a combination of a lid and a container that can suppress the contents from protruding onto lid through a through portion and covers the opening of the container. The lid has a body formed to be joinable to a container having an opening and an edge forming the outer periphery of the opening, and has at least one water-repellent breathable sheet, wherein the body has a joining region corresponding part corresponding to the region joined to the container along the edge of the container, and a lid region corresponding part formed from the inside of the joining region corresponding part, the lid region corresponding part having a through portion, and at least a part of at least one of the breathable sheets faces at least a part of the surface of the lid region corresponding part that opposes the container.

The present disclosure relates to a package, such as a food package, comprising a first part and a second part, the second part being sealed to the first part at a first part circumferential edge and in a circumferential attachment zone to form a sealed inner compartment, the attachment zone having a first peelable zone and a second non-peelable zone, the first part and the second part include polymeric materials, the package is a mono polyester material package, 95 wt % or more of the package is polyester material. The second part includes a laminate having an oriented Polyethylene Terephtalate (OPET) material layer and an amorphous Polyethylene Terephtalate (APET) layer, the amorphous Polyethylene Terephtalate layer facing the first part.