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COMPOSITE PANELS
High added value composite panels through recycling of waste lignocellulosic materials

Currently there are paper products and waste composite panels (mainly furniture parts) that are not appropriate for reuse in the paper industry. This project will develop a new technology for the production of medium-density fibreboard (MDF) using the fibres generated from waste composite panels (particleboard, fibreboard) and waste low-grade paper, as well as mixtures thereof.

Objectives
The objective of the project is to invent a new extrusion process, which will be employed for the treatment of waste panels, with or without adding waste paper, to obtain fibres suitable for the production of MDF, and which meet the requirements of the European standards.
A further project objective is to reactivate the aminoplastic resin used for the bonding of waste panels in such a way as to enable reduction of the resin level needed to rebond the fibres produced by the extrusion technique. For comparative studies, waste particleboard, fibreboard and paper, and mixtures of these will be defibrated in a conventional refiner commonly used in the MDF industry.

Results
Waste UF-bonded particleboards and waste UF-bonded medium density fibreboards (MDF) and mixtures from these can be processed using the twin-screw extruder technique to make wood fibres suitable for the manufacture of new MDF boards.
Waste UF-bonded particleboards and waste UF-bonded medium density fibreboards (MDF) can also be processed using the refiner technique, producing wood fibres suitable for the manufacture of new MDF boards.
These fibres can also be mixed with virgin wood fibres to make new MDF.
Fibres obtained from waste paper can be mixed with MDF and particleboard fibres to a certain extent (10-15%) for making new MDF.
The mechanical properties of the boards made from the extruded MDF and particleboard fibres meet the requirements of current regulations, as does their emission behaviour.
Large-scale industrial trials confirmed the suitability of extruded fibres as a raw material for partial substitution of virgin fibres in making new fibreboards.
The industrially-produced boards form mixed fibres proved to be equivalent to those made from virgin fibres only. Their emission behaviour was even better. Using recycled fibres leads to less consumption of resin.
The results of these industrial trials are in full conformity with the results from laboratory and pilot-scale trials.
The research objectives have been achieved.

Classified in SOIL, NON-FOOD PRODUCTS

Scientist responsible for the project

Mr HORST KERN
WILHELMSPLATZ 1
37073 Goettingen
Germany - DE

Phone: +49 551 393792
Fax: +49 551 393797
E-mail: eubuero@uni-goettingen.de

References

Project ID QLRT-1999-01221
Organisation Georg-August-Universitaet Goettingen
Area 5.3.2
Start date 01 February 2000
Duration (months) 36
Total cost 913 700 €
Total EC contribution   626 400 €
Status Completed

The partners

  • Fraunhofer-Institut fur Holzforschung Wilhelm-Klauditz-Institut, Germany - DE
    dix@wki.fhg.de
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