Processing method of bamboo-wood composite orthogonal laminated wood and obtained product

A bamboo-wood composite and processing method technology, applied in wood processing appliances, layered products, wood-layered products, etc., can solve the problem of low flexural strength and stiffness, rolling shear damage to surface laminates, and flexural tensile damage. and other problems, to achieve the effect of high integrity, excellent gluing performance and anti-rolling shear performance, and reducing self-weight burden

Active Publication Date: 2019-09-13
NANJING FORESTRY UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the prior art, common CLT (cross-laminated timber) materials are prone to rolling shear failure and bending tensile failure of the surface layer when subjected to out-of-plane bending loads, resulting in low bending strength and stiffness of the material However, the present invention combines wood materials and bamboo materials, comprehensively utilizes the advantages of the respective mechanical properties of wood materials and bamboo materials, optimizes the structural layout of cross-glued wood, and greatly improves the rolling shear, Mechanical properties such as bending and cross-grain pressure bearing

Method used

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  • Processing method of bamboo-wood composite orthogonal laminated wood and obtained product
  • Processing method of bamboo-wood composite orthogonal laminated wood and obtained product
  • Processing method of bamboo-wood composite orthogonal laminated wood and obtained product

Examples

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Effect test

Embodiment 1

[0044] Such as Figure 3 to Figure 4 As shown, the present embodiment takes the bamboo-wood composite CLT (cross-laminated timber) of the three-layer structure as an example, and adopts the recombined bamboo material in the spruce-pine-fir (Spruce-pine-fir, SPF) wood and the bamboo material To make bamboo-wood composite CLT, the technical solutions involved in the specific production process are:

[0045] A hierarchical structure is set up sequentially from top to bottom. Layer 1 is the upper surface composite outer layer in the composite outer layer 1, including the outermost layer 1a and the second outer layer 1b. The outermost layer 1a is made of recombined bamboo material, and the grain direction is along the In the length direction, the second outer layer 1b adopts SPF material, and the texture direction is along the length direction; layer two is the second layer 11, which is the middle layer (symmetrical laminate) in this embodiment, and the symmetrical laminate is a ho...

Embodiment 2

[0057] On the basis that other technical solutions of embodiment 1 remain unchanged, the difference is that in this embodiment:

[0058] S5. Glue application: Apply a structural adhesive to the surface to be glued of the cross-laminated wood substrate as a load-bearing member. The adhesive is a one-component polyurethane adhesive, and the amount of glue applied is 180g / m 2 ;

[0059] S7. Pressure curing: Under the condition that the ambient temperature is higher than 15°C, pressurize the four sides of the cross-glued wood board, specifically: pressurize in the up and down directions, the pressurized pressure is 1.5MPa, and pressurize the sides in the width direction, The pressurization pressure is 0.4MPa, and the pressurization time is 3h.

[0060] In this embodiment, the moisture content of the material is preferably 13%, which can best realize the penetration and gluing of the adhesive to the material in this embodiment, and improve the overall bonding strength of the cross...

Embodiment 3

[0063] Such as Figure 5 , Figure 6 As shown, the present embodiment takes the bamboo-wood composite CLT (cross-laminated timber) of the five-layer structure as an example, and adopts the recombined bamboo material in the spruce-pine-fir (Spruce-pine-fir, SPF) wood and the bamboo material To produce bamboo-wood composite CLT, the technical solutions involved in the specific production process are:

[0064]A hierarchical structure is set up sequentially from top to bottom. Layer 1 is the upper surface composite outer layer in the composite outer layer 1, including the outermost layer 1a and the second outer layer 1b. The outermost layer 1a is made of recombined bamboo material, and the grain direction is along the In the length direction, the second outer layer 1b is made of SPF material, and the grain direction is along the length direction; the second layer is the second layer 11, which is a transverse layer, made of recombined bamboo material, and the grain direction is al...

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Abstract

The invention relates to a processing method of a bamboo-wood composite orthogonal laminated wood and an obtained product, and belongs to the technical field of engineering wood product structures. The processing method of the bamboo-wood composite orthogonal laminated wood comprises the steps of material selection, light planing, humidity regulation, layer selection, gluing, assembling and pressurizing and solidifying, wherein the processed bamboo-wood composite orthogonal laminated wood comprises a parallel layer and a transverse layer which are orthogonal to each other, and the processed bamboo-wood composite orthogonal laminated wood further comprises a composite outer layer which is located on the upper surface and the lower surface of the bamboo-wood composite orthogonal laminated wood, a bamboo material and a wood material which form the composite outer layer are arranged in the length direction parallel to the laminated wood, the parallel layer between the two composite outer layers are made of wood materials, and the transverse layer between the two composite outer layers are made of bamboo materials. The bamboo-wood composite CLT has the advantages of high rolling shear strength, bending strength, rigidity and transverse grain pressure-bearing strength, the bending strength and the bending resistance elasticity modulus are higher than that of a common structure CLT by40% or higher, and the full-surface transverse grain pressure-bearing strength is up to 50% or higher.

Description

technical field [0001] The invention relates to the technical field of engineering wood product structures, in particular to a processing method of bamboo-wood composite cross-laminated wood and the resulting product. Background technique [0002] Cross-laminated timber (CLT) is a kind of factory prefabricated engineered wood in the form of rectangular, straight and flat panels formed by at least 3 layers of solid wood sawn timber or structural composite panels orthogonally formed by pressing with structural adhesives. product. Such as figure 1 As shown, CLT (cross-laminated timber) generally includes parallel layers and transverse layers. The parallel layer means that the grain direction of the laminate is parallel to the length direction of the CLT board, and the transverse layer means that the grain direction of the laminate is perpendicular to the length direction of the CLT board. CLT is different from glulam. Glulam is an engineered wood product that is laminated and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27D1/08B27K1/00B27D5/00B32B21/04B32B21/14B32B9/02B32B9/04B32B7/12B32B7/03B32B33/00
CPCB27D1/08B27D5/00B27K1/00B32B7/12B32B9/02B32B9/042B32B21/04B32B21/14B32B7/03
Inventor 王志强董惟群陈国骏何磊
Owner NANJING FORESTRY UNIV
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