The present invention relates to a package capable of releasing pressure formed therein. Said packaging comprises a container portion which is formed for accommodating product, and a flexible film part comprising at least one pressure-releasing design on an external surface of said part, characterized in that said pressure-releasing design comprises a score of at least two identical or different patterns combined together such that no less than three intersections of the patterns are formed and at least one said pattern is a closed-shape pattern. Moreover, the present invention relates to the pressure-releasing design for a flexible film, characterized in that said pressure-releasing design comprises a mark of at least two identical or different patterns combined together such that no less than three intersections of the patterns are formed and at least one said pattern is a closed-shape pattern.

Processes and systems that enhance the heating of packaged foodstuffs and other items in various microwave heating systems are described herein. The foodstuffs may be contained in a package including one or more energy control elements that interact with microwave energy in order to alter the effect that microwave energy has on the foodstuff. These energy control elements can enhance or inhibit microwave energy and a single package may include one or more energy control elements. In some cases, the energy control element may respond differently to different types of microwave energy. As a result, some packages described herein may exhibit different absorption or reflectance characteristics when exposed to microwave energy while being pasteurized or sterilized in a larger-scale microwave heating system than when the package is reheated in an at-home microwave oven prior to consumption or use.

A steam-releasing pouch includes two laminated sheets forming an accommodation compartment that accommodates a content, a sealing portion that seals the two sheets to form an opening that opens part of the accommodation compartment, and a steam-releasing sealing portion formed in the sealing portion to open as pressure of the accommodation compartment increases in a state in which the opening is sealed. The steam-releasing sealing portion includes a first sealant layer having at least a first base layer that faces the accommodation compartment and a second base layer laminated with the first base layer and a second sealant layer having at least a third base layer that faces the accommodation compartment and a fourth base layer laminated with the third base layer. The first base layer and the third base layer are joined together.

A package suitable for storing and cooking foods without user manipulation includes a venting mechanism actuated primarily or exclusively by temperature, rather than pressure. A vent hole can be sealed by a patch attached by a thermoplastic adhesive having a selected, well characterized Tg, or the patch itself can be a thermoplastic polymer having a selected Tg. The patch can be convection-heated, or a microwave absorbing susceptor material can be applied to the adhesive or patch for direct microwave heating. The patch can include a region that is melted by convection or by a susceptor material. A porous patch can be sealed by a low melting temperature polymer or by thermally sensitive ink. And/or, microwave susceptor material can be applied directly to a package wall and can melt a ventilation hole through the wall when a specified amount of microwave energy has been applied.

A packaging container comprises a laminated sheet where at least a substrate, a barrier layer and a sealant layer are laminated together in this order, and the laminated sheet has a stiffness of 1.01 [mN.Math.m] or less measured by a Taber stiffness tester method in accordance with JIS-P8125.

A compostable flexible material comprising at least two layers, wherein all of the layers of the compostable flexible material are compostable. The compostable material can be heated in a microwave. A compostable packaging can be made from the compostable flexible material and comprises a compostable reclosable pressure closure.

A compostable flexible material comprising at least two layers, wherein all of the layers of the compostable flexible material are compostable.

A container includes a bag, which has an internal space to accommodate contents and a first opening, and a fastener to open and close the first opening. The bag places contents into the internal space through the first opening. The bag also has a second opening and also places contents into the internal space through the second opening.

A container includes a bag, which has an internal space to accommodate contents and an opening, and a fastener to open and close the opening. The fastener includes a high engaging-strength portion and a low engaging portion. The bag includes a bag body forming the internal space and a vapor passage portion to remove vapor from the internal space, and places contents into the internal space through the opening.

The present invention is a self-standing spout-equipped packaging bag (1), including a bag body (10) that stores contents, and a spout (12) that is attached to an upper portion of the bag body (10). The bag body (10) includes a tubular barrel portion (20), and a bottom portion (22) which is attached to block an opening end of a lower part of the barrel portion (20). The spout (12) includes a tubular nozzle portion (14), and a flange portion (16) which projects from an outer surface of the nozzle portion (14). An upper end part (21) of the tubular barrel portion (20) over an entire circumference is liquid-tightly adhered to an upper surface (16e) of the flange portion (16) in a state of following a shape of the flange portion (16) in plan view to be in the same shape.