Stock material or miscellaneous articles – Hollow or container type article – Polymer or resin containing
Patent
1992-01-08
1993-09-28
Buffalow, Edith
Stock material or miscellaneous articles
Hollow or container type article
Polymer or resin containing
15624411, 428402, 428516, 428520, B29D 2200
Patent
active
052485340
ABSTRACT:
Packaging material for shaping into form stable liquid-tight containers with good oxygen-tight properties through fold forming, thermo-forming or other mechanical processing for shaping of the material.
The packaging material (10) comprises a skeletal layer (11) and a barrier layer (12) attached to the skeletal layer with good adhesion. The skeletal layer (11) is composed of a mixture of plastic, preferably polyolefine, and filler to an amount of between 50 and 80% of the total weight of the mixture, and the barrier layer (12) is composed of a plastic material comprising plastic of the same type as the plastic in the skeletal layer (11), preferably polyolefine, in a mixture with plastic of another type than the one mentioned.
The plastic of the aforesaid other type in the barrier layer (12) can be an ethylene/vinyl alcohol copolymer, polyvinylidene chloride, polyamide or similar plastic with good oxygen-tight properties, preferably an ethylene/vinyl alcohol copolymer to an amount of 40% or more of the total weight of the barrier layer.
REFERENCES:
patent: 4579784 (1986-04-01), Lemstra et al.
patent: 4948665 (1990-08-01), Rosen
Buffalow Edith
Tetra Alfa Holdings SA
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