Method for reprocessing thermoplast-coated packing materials and

Details Method for reprocessing thermoplast-coated packing materials and Method for reprocessing thermoplast-coated packing materials and

1991-12-27

1994-07-19

Michl, Paul R.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Treating polymer containing material or treating a solid...

521 47, 528502, 264 37, 264 39, 264115, 162 4, 162 29, 162119, C08F 600, C08J 1104

Patent

active

053310870

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 The rinsing agent is withdrawn from the process and supplied directly to a biological clarifying.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-fiber 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.

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