Manufacture of fiberboard according to the wet method with close

Details Manufacture of fiberboard according to the wet method with close Manufacture of fiberboard according to the wet method with close

1974-09-10

1976-06-29

Bashore, S. Leon

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

With formation of web or article

162190, 162264, D21C 300, D21F 166

Patent

active

039665402

ABSTRACT:
An improved method for the manufacture of wood fiberboard according to the wet system with a closed white water system includes the steps of drying the incoming lignocellulose containing material, prior to the dilution step, to a dryness, or solid consistency, which is higher than the dryness of the wet lap or sheet before final drying to produce the fiberboard product. Formaldehyde is added to the resulting white water which is homogenized to atomize occurring precipitations through efficient agitation and dispersion prior to being recirculated for use for diluting the incoming fiber material. Thus, there is obtained an efficient closed white water system which results in a reduction of environmentally harmful discharge of polluted water as well as the production of fiberboard with enhanced appearance.

REFERENCES:
patent: 1954800 (1934-04-01), Cyr et al.
patent: 3627630 (1971-12-01), Gagnon
patent: 3674457 (1972-07-01), Wolfson
patent: 3907630 (1975-09-01), Selander

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