Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A processing method of bamboo-wood composite cross-laminated wood and the resulting 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 bending and tensile failure, low bending strength and rigidity, rolling shear damage to the surface layer board and other problems, to achieve the effects of high integrity, reduced self-weight burden, excellent gluing performance and anti-rolling shear performance

Active Publication Date: 2021-04-02
NANJING FORESTRY UNIV
View PDF8 Cites 0 Cited by
  • Summary
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A processing method of bamboo-wood composite cross-laminated wood and the resulting product
  • A processing method of bamboo-wood composite cross-laminated wood and the resulting product
  • A processing method of bamboo-wood composite cross-laminated wood and the resulting product

Examples

Experimental program
Comparison scheme
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 make 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 along...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to a processing method of bamboo-wood composite cross-glued wood and the obtained product, belonging to the technical field of engineering wood product structure. The processing method of bamboo-wood composite cross-laminated wood includes the steps of material selection, planing, humidity control, layer selection, sizing, billet assembly, and pressure curing. The parallel layer and the transverse layer of the bamboo-wood composite cross-laminated wood are also included in the composite outer layer on the upper and lower surfaces. The parallel layers between the outer layers are made of wood material and the transverse layers between the two composite outer layers are made of bamboo material. The bamboo-wood composite CLT disclosed by the present invention has high rolling shear strength, flexural strength, stiffness and transverse grain bearing strength. The flexural strength and flexural elastic modulus are respectively 40% higher than those of ordinary structure CLT. The grain bearing strength is as high as 50%.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com