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Large-specification recombination composite structural wood and manufacturing method thereof

A composite structure and manufacturing method technology, applied in the field of construction and engineering structural materials, can solve the problems of decreased surface wettability, roughness, poor wettability, etc., and achieve the effect of improving the gluing performance and increasing the gluing surface

Inactive Publication Date: 2013-08-07
ANHUI HONGYU BAMBOO IND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Reconstituted wood is a kind of porous natural material wood or bamboo formed under relatively high pressure (the forming pressure of cold pressing method is about 60MPa, and the forming pressure of hot pressing method is 4~6MPa). The density of recombined wood is generally greater than 1.0g/cm 3 , when the ambient temperature and humidity change, deformations such as straight bending, warping, and warping will occur, and in severe cases, wire jumping and cracking will occur (Yu Wenji, Analysis of the Development Status and Trend of China's Recombined Bamboo Industry, Timber Industry, 2012 , 26(1):11-14), even if sanding is used in the processing process, it is difficult to obtain a flat glued surface; secondly, in the manufacturing process of the recombined wood, in order to make the adhesive distribution more uniform, the glue dipping is usually used Method, after the bamboo bundles

Method used

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  • Large-specification recombination composite structural wood and manufacturing method thereof
  • Large-specification recombination composite structural wood and manufacturing method thereof
  • Large-specification recombination composite structural wood and manufacturing method thereof

Examples

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Effect test

Embodiment 1

[0044] Example 1: Large-scale finger-jointed recombined composite structural material

[0045] The large-scale recombined composite structural material of the typical embodiment of the present invention comprises recombined bamboo (1), wood veneer (2), cardboard (3) and adhesive (not marked in the figure), such as Figure 6 As shown, it is formed by stacking multiple layers of longitudinally finger-jointed restructured bamboo (1), and a layer of wood veneer (2) is arranged between each layer of restructured bamboo (1), and the thickness of the wood veneer is 1.2mm; There is an adhesive layer (not shown in the figure) between the bamboo and the wood veneer, and the adhesive used is resorcinol adhesive; the longitudinally elongated recombined bamboo is between the joint surfaces of the longitudinal finger joints A layer of cardboard (3) is provided, and an adhesive layer (not shown in the figure) is arranged between the reorganized bamboo (1) and the cardboard (3), and the adhes...

Embodiment 2

[0063] Example 2 Large-scale mitred recombined composite structural material

[0064] The large-scale recombined composite structural material of a typical embodiment of the present invention includes recombined wood (1), wood veneer (2), cardboard (3) and adhesive (not shown in the figure), such as Figure 11 As shown, it is formed by stacking multiple layers of recombined wood longitudinally mitred, and a layer of wood veneer (3) is arranged between each layer of recombined wood (1), and the thickness of the wood veneer is 0.8mm; the recombined wood (1 ) and the wood veneer (3) is provided with an adhesive layer (not shown in the figure), and the adhesive used is a water-based polymer isocyanate adhesive; A layer of cardboard (2) is arranged between the joint surfaces of longitudinal miter joints, and an adhesive layer (not shown in the figure) is arranged between the recombined wood (1) and the cardboard (2). The adhesive used is a water-based high Molecular isocyanate adh...

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Abstract

The invention relates to large-specification recombination composite structural wood and provides a manufacturing method. Scrimber, adhesive, a veneer and a paper board are used as raw materials, and the large-specification recombination composite structural wood is manufactured through the methods of longitudinal spreading, multi-layer compounding and optimization of gluing interface structure and the like. The technical bottleneck such as cracks, bonding failure, low bonding strength and large physical mechanics performance loss for preventing the scrimber from being used in manufacturing of the large-specification recombination composite structural wood due to poor gluing in a secondary gluing process of the scrimber is overcome. The large-specification recombination composite structural wood can be used for manufacturing beams, columns, furniture and floors.

Description

technical field [0001] The invention belongs to the technical field of wood-based panels and their manufacture in the wood-based panel industry, and is especially suitable for building and engineering structural materials such as beams, columns, furniture and floors with high requirements on mechanical properties and large specifications. Background technique [0002] Reconstituted timber is a new type of building and engineering structural material, including recombined bamboo and recombined wood, which are manufactured from bamboo bundles and wood bundles through processes such as dipping, drying, billeting and gluing. At present, the production process of recombined wood is mainly divided into two categories: one is cold forming and heat curing process, referred to as cold pressing process; the other is the hot pressing process of recombined wood formed by drawing on the traditional hot pressing process of wood-based panels. Due to the limitation of the specifications and...

Claims

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Application Information

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IPC IPC(8): B27D1/10B27M1/08B27G11/00
Inventor 于文吉余养伦宁其斌
Owner ANHUI HONGYU BAMBOO IND TECH
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