Preparation method of medium-density fiberboard

• Main Authors: RUAN DENGMING, CHEN ZILIANG, MO WENJIN, LIAO SHUDE
• Format: Patent
• Language: Chinese; English
• Published: 26.04.2022
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUTORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTINGOF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL; METALLURGY; NAILING OR STAPLING MACHINES IN GENERAL; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL

The invention discloses a preparation method of a medium-density fiberboard, and relates to the technical field of artificial board production, the preparation method comprises the following operation steps: S1, pulping: carrying out hot grinding and cooking on wood fibers, carrying out hot grinding and defibrating by a defibrator to obtain wood fiber pulp, adding a waterproof agent with the mass fraction of 1-1.5%, and carrying out hot grinding and defibrating by a defibrator; adding a melamine modified urea-formaldehyde resin adhesive and an ammonium chloride curing agent, and mixing and stirring to obtain mixed slurry; s2, drying: drying the obtained mixed slurry at 80-100 DEG C to prepare dry fibers; s3, plate blank forming: paving the dry fibers into the formed plate blank, and performing hot pressing at the pressure of 2-3Mpa and the temperature of 180-200 DEG C to obtain the formed plate blank; and S4, post-treatment is conducted, specifically, the formed plate blank is subjected to edge cutting and po