See-through food packaging structures having a polyamide...

B - Operations – Transporting – 65 – B

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B65B 3/02 (2006.01) B32B 27/34 (2006.01) B65D 65/38 (2006.01) B65D 65/40 (2006.01) B65D 77/20 (2006.01) B65D 81/24 (2006.01) B65D 81/26 (2006.01)

Patent

CA 2244916

See-through, packaging structures for liquid or semi-liquid fruit or vegetable products, which have a polyamide food contact-layer of at least 0.4 mil. thickness, extends the color-life of the contained food product. The polyamide layer removes certain degradation products of polyphenolic compounds which otherwise would cause browning during storage. The packaging structures allow the contents and their color to be clearly seen by using a transparent film or sheet structural material having a polyamide surface-layer, the structural material being formed into a packaging structure. The packaging structure may be one such as a film pouch or a plastic bottle, the surface layer of the film or sheet forming the inner-surface food contact-layer of the packaging structure. Alternatively, a polyamide inner contact-layer in the lidding of a see-through package structure can be used, in which case the see-through package container portion itself need not have a polyamide inner contact-layer.

L'invention concerne des structures d'emballage transparentes pour fruits ou légumes liquides ou semi-liquides dont la couche polyamide en contact avec les aliments a une épaisseur d'au moins 0,4 millième de pouce et prolonge la durée de vie des couleurs du produit alimentaire recouvert. La couche polyamide élimine certains produits de dégradation de composés polyphénoliques qui sinon provoqueraient le brunissage durant le stockage. Les structures d'emballage permettent de voir clairement les produits contenus et leurs couleurs grâce à un film ou une matière structurale en feuille transparent comportant une couche superficielle en polyamide, la matière structurale étant transformée en une structure d'emballage. Cette structure d'emballage peut être un sachet sous forme de film ou une bouteille en plastique, la couche superficielle du film ou de la feuille formant la couche de la surface interne en contact avec les aliments de la structure d'emballage. Selon une variante, il est possible d'utiliser une couche polyamide à contact interne de recouvrement d'une structure d'emballage transparente, la partie réceptacle même ne nécessitant pas, dans ce cas, de couche polyamide à contact interne.

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