Described are ovenable or cook-in packages that maintain a hermetic seal. The packages include an information-laden header portion, a product portion that includes the hermetic seal and a line of weakness. The information-laden header portion is removably connected to the product portion by the line of weakness. The hermetic seal is maintained after the information-laden header portion is removed from the product portion.

A tray composite comprises a polymeric based liner including an exterior surface layer, an interior surface layer, and a fiber based component removably affixed to the interior surface layer of the polymeric based liner. A release agent is located between the polymeric based liner and the fiber based component. The polymeric based liner and the fiber based component are manually separable after they have been removably affixed together.

A method of manufacturing a foil for enclosing or wrapping a product configured to be heated in an oven includes: providing an aluminium layer, applying a first ink material at a surface of the aluminium layer to form a first ink layer, and applying a second ink material at a surface of the first ink layer to form a second ink layer. The first ink layer is positioned between the aluminium layer and the second ink layer, and is configured to absorb radiant energy. The second ink layer is configured to allow radiant energy to pass through to reach the first ink layer. A binder system of the first ink material or the second ink material is based at least in part on polyvinyl butyral (PVB).

A sealable enclosure is disclosed that is configured to enclose an object that is to be heated, wherein heating of the sealable enclosure with the object sealed therein permits gas generated by the heating to vent out through a first micro-pore portion disposed in a fold of film layer. Initially, the generated gas is retained in the sealable enclosure. When the temperature of the strip of heat sensitive adhesive reaches a threshold temperature, the strip of heat sensitive adhesive releases so that fold opens, wherein the gas vents through the micro-pore portion disposed in the film layer out into an ambient region surrounding the sealable enclosure while preventing ambient contaminates in the ambient region from entering into the sealable enclosure.

A sealable enclosure is disclosed that is configured to enclose an object that is to be heated, wherein heating of the sealable enclosure with the object sealed therein permits gas generated by the heating to vent out through a first micro-perforation portion disposed in a fold of film layer. Initially, the generated gas is retained in the sealable enclosure. When the temperature of the strip of heat sensitive adhesive reaches a threshold temperature, the strip of heat sensitive adhesive releases so that fold opens, wherein the gas vents through the micro-perforation portion disposed in the film layer out into an ambient region surrounding the sealable enclosure while preventing ambient contaminates in the ambient region from entering into the sealable enclosure.

A packaging or wrapping for a food product, capable of resisting to high temperatures and of eliminating the overpressure generated by the water vapour inside the packaging due to temperature rise, without the same packaging having any aperture communicating its inside and the outside environment. The packaging is also adapted to restrain/reduce the emission of odor-generating substances that are generated during the heating or baking of the packaged food product, with respect to what occurs in the absence of a packaging, or with a packaging provided with apertures.

A food wrap for wrapping ovenable foods includes a polyester layer having a thickness of about 12 μm having a first surface and a second surface opposite the first surface, a barrier layer comprising aluminum oxide covering at least a majority of the first surface of the polyester layer, a paper layer adhered to the barrier via an adhesive, where the paper layer has a grammage of about 35 g/m.sup.2, and a coating layer covering at least a majority of the paper layer, where the coating layer covers an ink label.

A heat-sealable composite film comprising an oriented polyester substrate layer having a first and second surface is provided. Disposed on the first surface of the substrate layer is a heat- sealable polymeric coating layer comprising a styrenic linear block copolymer thermoplastic elastomer, an ethylene vinyl acetate (EVA) copolymer and a tackifying resin. Also described is a sealed container comprising a receptacle containing a food product, and a lid formed from said heat-sealable composite film.

The present invention relates to the use of a laminate film, which can be transparent or white or colored (as described in the specification), comprising a first bi-axially oriented polyester film laminated to a second bi-axially oriented polyester film, wherein said first bi-axially oriented polyester film comprises a polyester base film comprising at least one polyester layer comprising one or more co-polyester(s) comprising units of terephthalic acid and at least a diol, said second bi-axially oriented polyester film comprises a polyethylene terephthalate base film, an inorganic vapor deposited layer, and an optional outer protective layer directly adhered to said inorganic vapor deposited layer, said inorganic vapor deposited layer comprising an inorganic compound selected from the group consisting of oxides, nitrides and oxynitrides of Al, Ti, Si, Zn, Sn, and mixture thereof, and a glue layer is interposed between said first bi-axially oriented polyester film and said second bi-axially oriented polyester film, and wherein said laminate film has (i) a tear ratio, between the tear initiation force measured according to ASTM D-1004 and said first bi-axially oriented polyester film total thickness, of at least 37 gf/micron in at least one of longitudinal and transverse direction, and (ii) a free shrink measured according to modified IS011501-95 at 180° C. for 5 minutes lower than 5% in at least one of longitudinal and transverse direction, as a lid in tray lidding applications and to the tray lidding packages made therefrom.

Blanks for forming clamshell containers and the resulting clamshell containers are described. The clamshell containers include a tray and a lid that are hingedly connected together. The tray is liquid tight, and typically includes gussets on each corner to prevent leakage. The lid and tray can be locked via at least one locking mechanism, optionally two different locking mechanisms. A first locking mechanism involves a front panel on the tray, with an extension portion that terminates in a hook or tab. The extension portion can fold over the front panel of the lid, and the hook or tabs slide into a slit(s) on the top of the lid. An optional second locking mechanism involves lid detents and tray detents. In some embodiments, in the locked position, the lid detents are underneath the tray detents and the tray detents retain the lid detents in place until a force is applied.