C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 11/06 (2006.01) B03B 9/06 (2006.01) B29B 17/02 (2006.01) C08L 1/02 (2006.01)
Patent
CA 2058540
ABSTRACT A method is described for reprocessing substantially used generally bilaterally plastic-coated beverage cartons or cardboard. The beverage cardboard is first comminuted with cutting tools in such a manner that isolated sheet pieces of about 5 cm diameter are obtained which in a subsequent decontaminating wash can be flushed as far as possible from all sides. The rinsing agent is withdrawn from the process and supplied directly to a biological clarifying. The precomminuted and washed cardboard is then divided in a second comminuting step into small sheet pieces of about 8 mm diameter and either simultaneously or thereafter subjected to disintegrating forces, the plastic layer particles being detached from the fibrous material substrate. The suspension thus disintegrated is separated into a fibrous fraction and a thermoplast foil fraction. After further cleaning and sorting steps the thermoplast is dried and regranulated for recycling. The substantially long-fibre fibrous component is beaten and preferably used in the production of corrugated board raw paper. As a special step, a certain amount of finely ground thermoplast material may be fixed to the fibrous material.
Oyen Wiggs Green & Mutala Llp
Pwa Industriepapier G.m.b.h.
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