Barrier pack container with inner laminated tube

Details Barrier pack container with inner laminated tube Barrier pack container with inner laminated tube

1992-09-18

1993-09-28

Kashnikow, Andres

Dispensing

Collapsible wall-type container

With wall-collapsing means

222105, 222107, 220 85B, 383109, 383121, B65D 3516

Patent

active

052480631

ABSTRACT:
The invention provides a barrier pack dispensing container having an outer container and a laminated, inner barrier tube with at least one metal barrier layer for substantial impermeability against contamination of product by propellant. In one embodiment, the laminate core contains a layer of pinhole-free aluminum bonded to an inner layer of thermoplastic to prevent contamination of product by the metal layer. A further inner plastic layer may be used. Prior to forming the tube, a first marginal side edge of the core is covered with a bead of plastic to prevent delamination. The laminate core is curved about a mandrel to form a tube having a second marginal side edge overlapping said beaded first side edge disposed inward of the tube, and sufficient pressure is applied with heat to form a laminate joint. The tube is cut to a desired length, crimped at one end, then crimped between the collar of the outer container and valve top assembly.

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