B - Operations – Transporting – 27 – N
Patent
B - Operations, Transporting
27
N
B27N 1/02 (2006.01) B27N 3/04 (2006.01) C08L 97/02 (2006.01)
Patent
CA 2137371
A method for the production of fiberboards made from pieces of wooden particles,and a polyurethane glue used as a binder in an amount of less than 10 percent by weight is described, in which the wooden particles are heated by pressurized steam and thus refined into fibers, the fibers being subjected to a blow line, being dried in a drying device, and then formed in the shape of a mat and pressed to form the fiberboards. The fibers are applied in an amount resulting in a bulk density of the whole fiberboard of approximately 550kg/m3 to 650 kg/m3. The binder is applied in an amount of 0.5 to 4.0 percent by weight, preferably in the range of 1.0 to 3.0 percent by weight, with respect to dry wooden particles. The steam generated during the heating of the wooden particles is passed through the drying device without having a portion thereof separated out and is used with the binder to form a coating layer out of polycarbamide to prevent the fibers from forming a preliminary reaction with the binder.
Hofmann Michael
Kramer Jurgen
Ludascher Christoph
Schenk Heinz
Teuber Gert
Glunz Ag
Goudreau Gage Dubuc
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