Abstract: The present invention relates to a method for the production of a self-venting packaging for use in heating a food item in a microwave oven, said packaging comprising a rupturable valve seal (3), said rupturable valve seal comprising an inside-inside seal, creating a weak point on said packaging, suitable to break in case of overpressure inside the packaging, said method comprising the following subsequent steps: providing an open plastic packaging; filling said packaging with a food item; —sealing the plastic packaging to obtain a closed pack via a closing seal with the food item therein ready to be sterilised; heat treating said food item; providing a rupturable valve seal (3) on the pack by ultrasound seal technology.

Abstract: The present invention discloses a self-venting package (6) for packing a food preparation and warming it up comprising at least one flexible film forming a first wall comprising a sealant layer (9) and a support layer (10), said flexible film being sealed by a peripheral seal (4) onto a second wall or on itself, thereby forming a main enclosure confining the food preparation; a rupturable seal (3) isolating a venting hole (1) from said main enclosure, said rupturable seal being arranged for opening, in use, a path to the venting hole upon internal pressure increase in said main enclosure, characterized in that a specific region (5) of the rupturable seal is weakened by means of a welded area with a reduced sealant layer thickness, said welded area guiding, in use, the rupture of said rupturable seal to the venting hole.

Abstract: The present invention is related to a method for producing a multilayer structure comprising a thin polymeric layer (10) comprising the steps of: coextruding said thin layer on both sides of a support polymer layer (11) and forming a coextruded structure (7); laminating or extrusion coating at least one additional layer (16) on both sides of said coextruded structure; peeling-off said thin layers, along with the additional layers from said support layer (16) to build a multilayer polymer structure.

Abstract: The present invention relates to a tamper-evident push-through packaging secured against fraudulent reuse comprising: —a polymer base web (1) comprising at least one pocket; —a multilayer lidding film (2) covering said pocket, said multilayer lidding film (2) comprising on its seal side a coextruded polymer film, said coextruded polymer film comprising a push-through polymer layer (3) sealed on the base web by a permanent seal and a peelable protective polymer layer (4), the polymers of both layers (3,4) being incompatible and in direct contact with each other, without interlayer, the adhesion between said push-through polymer layer (3) and said peelable protective polymer layer (4) being lower than the seal strength between said polymer base web (1) and said push-through polymer layer (3), wherein, in use, the push-trough layer leaves a seal seam (6), after removing the part of the push-trough layer (3) covering the pocket and wherein said protective layer (4) cannot be resealed by a heat sealing process on

Abstract: A layer of a biodegradable, compostable co-polyester is extrusion coated onto the surface of a bio-degradable compostable cellulose film to overcome the limitations of cellulose film as a packaging film for fresh produce and still retain the biodegradability, compostability and stiffness of the overall structure. Additionally, good bond strength between the cellulose film and the extruded co-polyester polymer is achieved by applying a thin coating of co-polyester to the surface of the cellulose film by means of a solvent or water based coating process. A biodegradable, compostable co-polyester polymer is extrusion coated onto an additional barrier layer to provide a significant barrier enhancement in high humidity environments beyond levels that would be reasonably predicted.

Abstract: The package (10) forming at least one pocket delimited by at least one flexible film (12) having two principal faces (14, 16) which are connected to one another along at least two opposing transverse connecting lines (18, 20) which delimit the said pocket between them, characterised in that a first face (14) has a length measured between the two opposing connecting lines which is less than the length measured between the two opposing connecting lines of the second face (16), and in that the first face has a weakened line (40) between the two opposing connecting lines (18, 20).

Abstract: A packaging wrapper consisting of a film intended to be closed by two twists on either side of an article to be packaged, characterized in that the film comprises, on the internal side in relation to the article to be packaged, a sealing coating placed along two transverse strips on either side of the article to be packaged and extending parallel to an axis passing through the two twists. The film may additionally comprise two lengthwise strips of sealing coating extending on either side of the strips of sealing coating extending on either side of the article to be packaged, perpendicularly to the said transverse strips in the regions of formation of the twists. These sealing coatings may be either cold-sealing coatings or heat-sealing coatings.

Abstract: The packaging wrapper consists of a film intended to be closed by at least one twist (22), including, on the internal side, a cold-sealing coating placed along two lengthwise strips (12, 14) on either side of the article to be packaged in order to retain the twists. The film additionally has at least one transverse additional strip (24), (26) of cold-sealing coating placed along one edge of the film (20) perpendicularly to the lengthwise strips (12, 14). The packaging process consists in closing the wrapper by virtue of the transverse strips (24), (26), along a direction parallel to the axis passing through the twists (22).