Plywood with twist resistance and high strength and manufacturing method thereof

Abstract

The invention discloses a plywood with twist resistance and high strength and a manufacturing method thereof and belongs to the field of plywoods. The plywood comprises multiple layers of single plates, wherein the textures of adjacent single plates are mutually vertical; and a binding layer is arranged between the adjacent single plates and is a formaldehyde-free hot melt film. The manufacturing flow of the plywood comprises the following steps of: selecting the single plates; drying the single plates until the water content of the single plates is less than 12 percent; sloping the single plates; combining the single plates; pre-pressing the single plates; performing hot rolling on the single plates; cooling the single plates (cold water circulation); puttying the single plates; setting the thickness and sanding the plates; sawing sides of the single plates; coating a masking agent on the single plates; performing cold pressing (0.67MPa); veneering; performing hot rolling; and sawing sides. The plywood has the beneficial effects that: the bonding strength is high and passes a bonding strength test of I type of man-made board / phenolic glue (WBP) level and I type of man-made board; the plywood does not contain formaldehyde, is highly environment-friendly and is high in bonding strength; a glue coater is not required, so the traditional glue coating process is thoroughly changed; pollution caused by cleaning the glue coater is avoided; the production process is simple; the labor is saved; and the defect of short water activity period of the traditional liquid glue is overcome.

Description

technical field [0001] The invention relates to a plywood, in particular to a twist-resistant high-strength 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. Traditional plywood usually has multiple different varieties such as three-ply board, five-ply board, and multi-layer board. Usually used in construction and packing boxes etc. Plywood can improve wood utilization and is a major way to save wood. [0003] The traditional plywood production method is to glue a group of veneers perpendicular to each other in the direction of the wood grain of adjacent layers. Usually, the surface board and inner layer board are symmetrically arrange...

AI Technical Summary

Problems solved by technology

[0005] The disadvantage is that the formaldehyde content of the plate is high and the anti-distortion performance is poor.

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