Packaging tube
AssigneeKMK Lizence Ltd.
InventorHans Hirt
Life of this patent
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Abstract
The invention concerns a packaging tube comprising a multi-layer pure plastic laminate and a sealing arrangement for tube heads for the packaging of materials with volatile substances such as flavouring or scent substances, which has a resistance to diffusion which is the same as or comparable to tubes which in their laminate structure have a metal layer as a diffusion barrier and which improves the recycling of tubes.
Claims7
A packaging tube comprising a tube body formed from a multilayer plastic laminate having a plastic diffusion barrier layer bonded on both sides to a layer of plastic material selected from the group consisting of polyethylene and polypropylene, the barrier layer and the plastic layers being bonded to each other using bonding agents, a tube head of plastic material connected by abutting and overlapping at least one end of the tube body, the tube head having a shoulder and a discharge portion and further having a diffusion barrier layer, said diffusion barrier layer being formed of a multiple ply plastic laminate comprising a layer of polyethylene or polypropylene and a barrier layer of plastic material, the plastic barrier layer of the tube body and the plastic barrier layer of the tube head each comprising a layer of ethylene-vinyl alcohol polymer or polyethylene terephthalate, the diffusion barrier of the head being arranged upon a side of the shoulder of the tube head facing the inside of the tube body, the means acting as a diffusion barrier extending at least from an end of the tube body as a first end to an entry orifice of said discharge portion as a second end and the plastic material layer of the tube body being attached to the tube head.
Dependencies are inferred from the claim text.