Plywood with twist resistance and high strength and manufacturing method thereof

A manufacturing method and high-strength technology, applied in the field of plywood, can solve the problems of poor anti-distortion performance and high formaldehyde content of the board, and achieve the effects of high bonding strength, simple production process and economical production process.

Inactive Publication Date: 2012-06-27
XUZHOU ANLIAN WOOD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The disadvantage is that the formaldehyde content of t

Method used

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  • Plywood with twist resistance and high strength and manufacturing method thereof
  • Plywood with twist resistance and high strength and manufacturing method thereof

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Experimental program
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Embodiment Construction

[0025] As shown in the accompanying drawings, a twist-resistant high-strength plywood is a five-ply board, including five layers of superimposed veneers 1, the textures of adjacent veneers are perpendicular to each other, and there is an adhesive layer 2 between adjacent veneers, so The above-mentioned adhesive layer is a zero-formaldehyde hot-melt film.

[0026] Anti-twisting high-strength plywood process:

[0027] Select core board → dry moisture content below 12% → slope (slope at both ends to facilitate splicing and enhance layering) → combination (core board, hot-melt film) → pre-press (0.67Mpa) → hot press (280°C , 2Mpa)→cooling (cold water circulation)→puttying→thickness sanding→sawing edge→smearing concealer→cold pressing (0.67Mpa)→veneering→hot pressing→sawing edge.

[0028] The plywood made by this method, after testing:

[0029] (1) The bonding strength is high, and it can pass the bonding strength test of Type I wood-based panels / WBP grade and Type I wood-based p...

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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...

Claims

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Application Information

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IPC IPC(8): B27D1/04B27D1/08B32B21/13B32B21/14B32B37/06B32B37/10
Inventor 张伟
Owner XUZHOU ANLIAN WOOD
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