Multilayer abuse resistant high barrier packaging film

B - Operations – Transporting – 32 – B

Patent

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Details

B32B 27/06 (2006.01) B32B 27/20 (2006.01) B32B 37/28 (2006.01)

Patent

CA 2294891

A multilayer film exhibits exceptional N2-, O2-, and CO2-barrier without containing metal foil. The film can also be provided with high moisture- barrier characteristics as well as high opacity to light, and can also be made very abuse-resistant, and can be especially suited for the packaging of relatively heavy rolls of undeveloped photographic film. A preferred opaque multilayer film is especially suited to packaging light-sensitive products such as photographic film and photographic paper, and has an outer seal layer and at least one inner layer containing carbon black, preferably two inner layers containing carbon black. The presence of the carbon black in one or more inner film layer prevents the carbon black from rubbing off of the film on film-making and packaging equipment, as well as a product packaged in the film. Articles such as bags, casings, and pouches can be made from the film.

Ce film multicouche possède d'exceptionnelles propriétées de barrière contre le N¿2?, l'O¿2? et le CO¿2? sans contenir de feuilles de métal. Ce film peut également être pourvu de propriétés haute barrière contre l'humidité ainsi que d'une forte opacité à la lumière, et il peut également être rendu très résistant aux manipulations abusives, ce qui le rend particulièrement approprié pour l'emballage de bobines relativement lourdes de film photographique non dévelopé. Un film multicouche opaque préféré est particulièrement approprié pour l'emballage de produits sensibles à la lumière, tels que des films photographiques et des papiers photographiques, et il possède une couche scellante extérieure et au moins une couche intérieure contenant du noir de carbone, de préférence deux couches intérieures contenant du noir de carbone. La ou les couches intérieures du film qui entourent le noir de carbone empêchent le film de frotter contre le noir de carbone sur l'équipement d'emballage et de fabrication du film, ainsi que le produit emballé dans le film. Des articles tels que sacs, étuis et sachets peuvent être fabriqués à partir de ce film.

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