Packaging material, process for producing same and use thereof

Details Packaging material, process for producing same and use thereof Packaging material, process for producing same and use thereof

D - Textiles, Paper

21

H

D21H 17/68 (2006.01) B65D 65/42 (2006.01) D21H 21/16 (2006.01) D21H 27/10 (2006.01)

Patent

CA 2081081

The present invention relates to a packaging material for reduced transfer from a package to its content of substances causing undesirable taste and/or hazardous substances, this reduction being due to the packaging material containing a hydrophobic zeolite. More specifically, the invention concerns paperboard, in which case the substances causing undesirable taste mainly are naturally occurring extractive substances, oxidation products thereof and, to a lesser extent, the paper chemicals present. Further, the presence of a hydrophobic zeolite in the paperboard enhances the water-repellent (hydrophobic) capacity. Also, the present invention concerns a method for production of a packaging material of paper, board or paperboard by forming and dewatering a suspension of lignocellulose-containing fibres, where the dewatering takes place in the presence of a hydrophobic zeolite. Moreover, the present invention relates to the use of a hydrophobic zeolite for production of a packaging material, as well as the use of the thus-produced packaging material in packages for solid or liquid foodstuff, tobacco or medicines.

Matériau d'emballage permettant de réduire le passage de substances à goût indésirable et (ou) dangereuses d'un emballage vers son contenu ; cette réduction est rendue possible grâce à la présence de zéolite hydrophobe dans le matériau d'emballage. L'invention concerne plus spécifiquement le carton, auquel cas les substances responsables du goût indésirable sont principalement des substances extractibles présentes naturellement, leurs produits d'oxydation et, à un degré moindre, les composés chimiques présents dans le papier. De plus, la présence d'une zéolite hydrophobe dans le carton améliore la capacité hydrofuge (hydrophobe) de ce dernier. En outre, l'invention concerne une méthode pour la production de papier, de carton ou de panneaux d'emballage par formation et déshydratation d'une suspension de fibres renfermant de la lignocellulose, où la déshydratation s'effectue en présence d'une zéolite hydrophobe. Enfin, l'invention est liée à l'emploi d'une zéolite hydrophobe pour la production d'un matériau d'emballage, ainsi qu'à l'emploi du matériau ainsi obtenu pour les emballages d'aliments solides ou liquides, de tabac ou de médicaments.

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