A packaging material and packages produced from the material...

B - Operations – Transporting – 32 – B

Patent

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Details

B32B 27/20 (2006.01) B65D 65/20 (2006.01) B65D 81/30 (2006.01)

Patent

CA 2333060

The disclosure relates to a packaging material and packages, for example bottles, produced from the packaging material, for light-sensitive products. The packaging material (10) includes at least one layer (11) of mineral-filled plastic which, for light barrier elevating purposes, also includes particles (11c) of carbon black. The material (10) which is preferably of triple-layer type, has the mineral-filled layer (11) containing carbon black disposed between outer, surrounding layers (12 and 13) of plastic which is preferably the same plastic as the plastic in the interjacent layer (11). In order to conceal the interjacent layer (11) containing carbon black, at least one, but preferably both, of the outer plastic layers may incorporate white pigment or other white colouring agent, preferably titanium dioxide (TiO2). Bottles are produced from the packaging material (10) by a combined extrusion and blow moulding operation in a per se known manner using conventional process equipment.

L'invention concerne un matériau d'emballage et des paquets, par exemple, des bouteilles, produits avec ce matériau d'emballage et destinés à des produits sensibles à la lumière. Ce matériau d'emballage (10) comprend au moins une couche (11) de plastique à charge minérale qui contient aussi des particules (11c) de noir de carbone pour augmenter la barrière de lumière. Le matériau (10), de préférence, de type triple couche, a une couche à charge minérale (11) qui contient du noir de carbone et qui est intercalée entre des couches externes (12 et 13) en plastique, de préférence, le même plastique que le plastique de la couche centrale (11). Afin de masquer la couche centrale (11) contenant du noir de carbone, au moins une des couches plastique externes, de préférence les deux, peut/peuvent contenir des pigments blancs ou autre colorant blanc, de préférence, du dioxide de titane. Des bouteilles sont produites à partir de ce matériau d'emballage (10) par une opération mixte d'extrusion et de moulage par soufflage connue en soi à l'aide d'un équipement de traitement classique.

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