B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 27/08 (2006.01) B29C 47/00 (2006.01) B32B 27/32 (2006.01) B32B 27/34 (2006.01) B32B 27/36 (2006.01)
Patent
CA 2660139
The present invention proposes a novel multilayer sheet- or tube-shaped food casing or food film which is produced by the blast drawing process and is biaxially oriented by the triple bubble process, designed as food packaging in the form of shrink bags, sealable films, wrapping films or the like. This novel food casing or food film has at least nine layers, of which one EVOH layer has been designed as oxygen barrier embedded symmetrically between two PA layers for strength, these in turn being symmetrically enclosed by two PO layers for the water-vapour barrier, where the external layer is formed by a material resistant to high temperature, e.g. PET, which can also give, alongside the excellent optical properties, speeds (cycle number) in further processing which are markedly higher than those known hitherto.
La présente invention concerne pour la première fois, des enveloppes ou des feuilles alimentaires plates ou tubulaires fabriquées dans le procédé d'extrusion-soufflage ou étirées axialement dans le procédé à bulle triple, qui servent d'emballage alimentaire sous la forme de sachets rétractables, de film thermoscellable, de feuilles à usage unique ou similaires. Cette nouvelle enveloppe ou feuille alimentaire comporte au moins neuf couches dont une couche EVOH sert de barrière à oxygène qui est incorporée symétriquement entre deux couches de PA pour la solidité qui sont elles-mêmes entourées de deux couches de PO servant de barrière à la vapeur d'eau, et dans laquelle la couche extérieure est constituée d'un matériau résistant aux températures élevées comme le PET qui permet en plus des propriétés optiques excellentes des vitesses de transformation (cadence) supérieures à celles connues jusqu'à présent.
Kuhne Anlagenbau Gmbh
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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