CS259018B1 - Method of manufacturing fiber boards - Google Patents

Abstract

The method of producing fiberboard consists in diluting the fibrous mass obtained by grinding wood chips with water, treating it with a glue dispersion based on phenol-formaldehyde resin, forming a mat and pressing the boards. At the stage of diluting the fibrous mass with water, urea is added to it in an amount of 0.3 to 2.5% of the mass of absolutely dry wood*

Description

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P E Φ E P A T

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Claims (1)

OBJECT OF THE INVENTION Process for the production of fibreboards, comprising dissolving wood chips into fibrous mass, diluting fiber mass with water, treating it with a glue dispersion for base-formaldehyde resins, forming a carpet, pressing and heat-treating the panels, characterized in that in order to eliminate the free phenol content and formaldehyde in the plate in the wastewater, at the dilution stage of the fibrous mass, the urea enters into it in an amount of 0.3 to 2.3% of the mass of dry-dry wood · Uzgorod's production and printing enterprise, Proektnaja 4, Ugorgorod 6062, Price 2 , 40 Kcs