C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 11/08 (2006.01)
Patent
CA 2098603
ABSTRACT OF THE DISCLOSURE A process is disclosed for transforming into re-usable raw materials polyolefin-containing used objects, in particular objects composed of polyethylene composite materials, preferably composite packaging foils made of several layers, including at least one first polyethylene layer and at least one second layer made of a similar polyethylene of the same type, of another polymer or of another material, for example aluminum. According to this process, the used objects are shredded and the shreds are exposed under intense agitation to the action of a solvent in at least a solvent bath containing an organic solvent. When the individual layers of the composite material are bonded by a bonding agent composed of higher-percentage co- or terpolymers of polyethylene with acrylic acid and its derivatives, as well as of higher-percentage ethylene- vinylacetate copolymers, a solvent is used that causes the bonding agent to swell, such as low-boiling acetic acid ester.
Brauer Jochen
Lorenz Arnulf
Marks & Clerk
Nordenia Verpackungswerke Gmbh
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