Abstract

The present invention relates to a sealable, thermoformable, heat-shrinkable multi-layer film having a symmetrical construction around a two-ply inner layer, and having a heat-shrinkability in machine direction and in cross direction of in each case at least 20% at 93°C, the heat-shrinkability being substantially unaffected by thermoforming, and also to methods whereby the multi-layer film of the invention can be processed advantageously to heat-shrunk packaging, more particularly using specially equipped packaging machines.

IPC Classes  ?

• B32B 27/08 - Layered products essentially comprising synthetic resin as the main or only constituent of a layer next to another layer of a specific substance of synthetic resin of a different kind
• B32B 27/32 - Layered products essentially comprising synthetic resin comprising polyolefins
• B29C 51/42 - Heating or cooling
• B29C 51/10 - Forming by pressure difference, e.g. vacuum
• B29C 51/14 - Shaping by thermoforming, e.g. shaping sheets in matched moulds or by deep-drawingApparatus therefor using multilayered preforms or sheets
• B65B 47/02 - Apparatus or devices for forming pockets or receptacles in or from sheets, blanks, or webs, comprising essentially a die into which the material is pressed or a folding die through which the material is moved with means for heating the material prior to forming
• B65B 9/04 - Enclosing successive articles, or quantities of material, between opposed webs one or both webs being formed with pockets for the reception of the articles, or of the quantities of material
• B65D 65/40 - Applications of laminates for particular packaging purposes

Abstract

The present invention relates to a packaging (1) which is suitable for microwaves, is made from plastic film and comprises a packaging recess (2), in which a packaged item (5) is introduced, and a closure film (6) which is sealed on the edge (8) of the packaging recess (2) along a sealed seam (3), wherein the edge (8) has a region (4) which is shaped as a channel (7), is initially closed, and through which steam can escape when the packaged item (5) is heated after it has been opened along a weakening line (10). Furthermore, the present invention relates to a method for heating the packaged item in the packaging according to the invention.

IPC Classes  ?

• B65D 81/34 - Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs intended to be cooked or heated within the package