Method for producing total-eucalyptus plywood by adopting anticorrosive composite urea resin

Abstract

The invention discloses a method for producing total-eucalyptus plywood by adopting anticorrosive composite urea resin. The method comprises the following steps: rotatably cutting wood boards; drying each board; gluing; performing cold pressing for three times; stewing and conditioning; performing hot pressing for three times; cooling and conditioning; determining the thickness of a board blank and sanding the board blank. The key points of the production method disclosed by the invention are that melamine modified urea resin is adopted as a main material of an adhesive and is added with oxidized starch to form a viscous compound, polyvinyl alcohol is taken as a toughening agent, hydrogenated rosin is taken as an antioxidant, polyisocyanate is taken as a curing agent, isobutyl triethoxy silane is taken as a bridging agent, phenolated lignin is taken as a formaldehyde catcher and a preservative is also added to prepare the anticorrosive composite urea resin. The total-eucalyptus plywood produced by adopting the anticorrosive composite urea resin has the advantages of low formaldehyde residual volume and good corrosion resistance, is relatively good in resistance to wood-destroying fungi, mould and white ants, and is prolonged in service life.

Description

technical field

[0001] The invention belongs to the field of wood-based panel manufacturing, in particular to a method for producing whole eucalyptus plywood by adopting an anti-corrosion compound urea-formaldehyde resin. Background technique

[0002] Plywood is an important type of wood-based panel. The plywood currently on the market is a three-layer or multi-layer board-like material that is cut into veneers by wood segments or sliced ​​into thin wood by wood squares, and then glued with adhesives. It is usually made of odd-numbered veneers, and the fiber directions of adjacent veneers are glued perpendicular to each other; plywood is widely used in architectural decoration, furniture manufacturing, wooden door manufacturing, Floor manufacturing, marine and vehicle interior finishing.

[0003] The production of plywood is mostly made of fast-growing eucalyptus wood sheets pressed together by adhesives. Eucalyptus wood has a dense structure and hard material, and the lam...

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