Composite plywood and manufacturing method thereof

Abstract

The invention discloses composite plywood and a manufacturing method thereof. The manufacturing method comprises the following steps of: the step 1, uniformly stirring wood shavings or wood fibers with an adhesive; the step 2, paving the stirred wood shavings or wood fibers on the two board surfaces of the plywood, and carrying out high-temperature hot pressing to prepare the wood shaving composite plywood or wood fiber composite plywood; the step 3, after hot pressing is completed, allowing the composite plywood to be subjected to air blowing cooling for 5 min or above, and then collecting and stacking the plywood, and naturally curing the wood fiber composite plywood for more than 7 days, then performing edge sawing, sanding and thickness determining, and controlling the plate surface thickness error to be + / -0.1 mm. The composite core-board prepared by the method is good in flatness, high in surface bonding strength, low in water content, good in size stability, cracking resistanceand cold and hot cycle resistance, and capable of reducing the production cost.

Description

technical field [0001] The invention relates to the technical field of plywood manufacture, in particular to a composite plywood and a manufacturing method thereof. Background technique [0002] Plywood is a three-layer or multi-layer board-like material that is made of wood sections that are peeled into veneers or sliced ​​into thin wood, and then glued with adhesives. Usually, odd-numbered veneers are used, and adjacent layers of veneers are used. The fiber directions are glued perpendicular to each other. The facing materials often used in the production of plywood mainly include: [0003] 1) Solid wood veneer with a thickness of 0.10-0.75mm, such as poplar, mahogany, and sophora japonica; [0004] 2) Integrated materials with a thickness of 0.2-0.6mm, such as technical veneer; [0005] 3) High-density fiberboard with a thickness of 1 to 3 mm. [0006] When the above-mentioned facing material is used, the base material is formed by applying glue on the upper and lower...

AI Technical Summary

Problems solved by technology

The base material or finished finished product pressed by the above 1) and 2) facing materials has poor surface flatness, low surface bonding strength, high moisture content, dimensional stability, crack resistance, and cold resistance. Defects such as poor thermal cycle performance

Using the above 3) board base material or finished finished product that is pressed and pasted with the facing material has problems such as formaldehyde pollution, low surface bonding strength, large water absorption thickness expansion rate, large thickness, and high production cost.

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