Abstract: An improved retortable can is provided in which a primary structural element is a layer of paper or paperboard, which is laminated with a shielding layer on each side of the paper or paperboard core, and at least one barrier layer. The shielding layer is resistant to heat and moisture, and the barrier layer substantially reduces the transmission rate of oxygen, moisture, and flavor. A method for manufacturing the paper-based retortable can is also provided, which converts a web of the laminate material into tubes, either in a spiral-wrap (or a convolute) shape or a cylindrical shape that uses a side seal. An additional method for manufacturing paper-based retortable cans is provided in which two separate “half-structures” of laminate are joined in a spiral-wrap manufacturing step to form a single laminated structure with two paper/paperboard interior layers having an adhesive therebetween.

Abstract: A bladderless dunnage bag is provided in which the primary material used for construction is a dunnage material based upon a paper substrate in which one or both of its outer surfaces are coated with a resin material that is impermeable to air and is heat sealable. By use of heat sealable coating materials, a center seal and the end seals of the dunnage bag can be formed in a moving process, and the heat-sealable joints or seals are stronger than the paper substrate material itself, since the heat seals are comprised of the coating material being adhered to itself, rather than the use of an adhesive applied to a paper material as in conventional dunnage bags. In a preferred construction, the dunnage material has a resin coating on both the top and bottom surfaces of the paper substrate, and both lap joints and fin joints can be formed by a heat sealable process that adheres the coating materials together, and does not depend upon the paper material for strength.

Abstract: A bladderless dunnage bag is provided in which the primary material used for construction is a dunnage material based upon a paper substrate in which one or both of its outer surfaces are coated with a resin material that is impermeable to air and is heat sealable. By use of heat sealable coating materials, a center seal and the end seals of the dunnage bag can be formed in a moving process, and the heat-sealable joints or seals are stronger than the paper substrate material itself, since the heat seals are comprised of the coating material being adhered to itself, rather than the use of an adhesive applied to a paper material as in conventional dunnage bags. In a preferred construction, the dunnage material has a resin coating on both the top and bottom surfaces of the paper substrate, and both lap joints and fin joints can be formed by a heat sealable process that adheres the coating materials together, and does not depend upon the paper material for strength.

Abstract: A package includes a food containing shell for storing, displaying, shipping and heating of the enclosed food in a microwave oven. The shell includes a lower portion and an upper portion, and is constructed, at least in part, of a multi-layer laminate which includes a microwave-interactive layer of a metallic alloy of nickel and chromium. The laminate also includes a structural layer and a protective layer on the side of the laminate facing the food. The shell may also include slits which remain closed during storing, displaying and shipping, but which open under the internal pressure of the vapors formed during heating allowing the vapors to be vented from the interior of the shell.