Flexible tube, resistant to stress cracking and impermeable...

B - Operations – Transporting – 29 – D

Patent

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Details

B29D 23/20 (2006.01) B29C 45/00 (2006.01) B29C 45/36 (2006.01) B65D 35/08 (2006.01)

Patent

CA 2402540

The invention concerns a tube comprising a wall made of C¿4?-C¿10? linear ethylene-olefin copolymer or a mixture of C¿4?-C¿10? linear ethylene-olefin copolymer having a melt index ranging between 3 and 10 g/mn, and a density ranging between 0.880 g/cm?3¿ and 0.935 g/cm?3¿ inclusive. The skirt has a mid-height wall thickness ranging between 0.30 and 10 mm inclusive, and a length between 40 and 200 mm inclusive. Furthermore, the skirt and the dispensing head are made in a single injection moulding operation in an injection mould. The invention is useful for making tube-like packages.

Le tube selon l'invention a une paroi en un copolymère d'éthylène-oléfine linéaire en C4 à 10 ou en un mélange de copolymères d'éthylène-oléfine linéaire en C4 à 10 ayant un indice de fluidité compris entre 3 et 10 g/10 mn, et une densité comprise entre 0,880 g/cm3 et 0,935 g/cm3 inclus. La jupe a une épaisseur de paroi à mi-hauteur comprise entre 0,30 et 1,00 mm inclus, et une longueur comprise entre 40 et 200 mm inclus. De plus, la jupe et la tête de distribution sont fabriquées en une seule opération d'injection dans un moule d'injection. L'invention trouve application dans la fabrication d'emballages du type tube.

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