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Method of using eucalyptus to make formaldehyde-free veneer laminated lumber

A technology of laminated veneer and eucalyptus, which is used in the joining of wooden veneers, moisture-conditioning wood, manufacturing tools, etc. The effect of economic and social benefits

Inactive Publication Date: 2012-07-04
ZHEJIANG SHENGHUA YUNFENG GREENEO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention overcomes the deficiencies in the above-mentioned prior art, and provides a method for manufacturing formaldehyde-free laminated veneer with eucalyptus with simple and reasonable process. The present invention basically releases Intrinsic stress of eucalyptus veneer, at the same time, solve the problem of warping and deformation of laminated veneer lumber made of eucalyptus through scientific and reasonable billeting methods, and the adhesive adopts formaldehyde-free composite modified starch adhesive for wood, so that Eucalyptus laminated veneer lumber has no formaldehyde release, making it an environmentally friendly product

Method used

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  • Method of using eucalyptus to make formaldehyde-free veneer laminated lumber
  • Method of using eucalyptus to make formaldehyde-free veneer laminated lumber
  • Method of using eucalyptus to make formaldehyde-free veneer laminated lumber

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Embodiment 1

[0015] Embodiment 1: a kind of method of making formaldehyde-free laminated veneer with eucalyptus wood, comprises following operation:

[0016] ①, Medium and small-diameter eucalyptus logs are peeled and cut to make eucalyptus veneers with a thickness of 2.4mm, a length of 1270mm, and a width of 320mm or 640mm;

[0017] ②, the eucalyptus veneer is dried in a dryer, and the moisture content of the veneer is controlled below 12%;

[0018] ③. Place the eucalyptus veneer in a carbonization kiln for carbonization treatment at a temperature of 200°C for 2 minutes;

[0019] ④, use starch adhesive on the veneer after carbonization, and glue it on the glue machine, and the amount of glue is controlled at 300g / square meter on both sides; the proportion and preparation of starch adhesive are in the patent number: CN201010171082.8 documented in patent documents.

[0020] ⑤, Blank assembly: the glued eucalyptus veneer is made into a group of 8 layers, such as figure 1 As shown, the gra...

Embodiment 2

[0024] Embodiment 2: a kind of method of making formaldehyde-free laminated veneer with eucalyptus wood, comprises following operation:

[0025] ①, Medium and small-diameter eucalyptus logs are peeled and cut to make eucalyptus veneers with a thickness of 3.0mm, a length of 1300mm, and a width of 320mm or 640mm;

[0026] ②, the eucalyptus veneer is dried in a dryer, and the moisture content of the veneer is controlled below 12%;

[0027] ③. Place the eucalyptus veneer in a carbonization kiln for carbonization treatment at a temperature of 220°C for 3 minutes;

[0028] ④, use starch adhesive on the veneer after carbonization, and glue it on the glue machine, and the amount of glue is controlled at 320g / square meter on both sides; the proportion and preparation of starch adhesive are in the patent number: CN201010171082.8 documented in patent documents.

[0029] ⑤, Blank assembly: the glued eucalyptus veneer is made into a group of 8 layers, such as figure 2 As shown, in eac...

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Abstract

The invention discloses a method of using eucalyptus to make formaldehyde-free veneer laminated lumber, which solves the problem that veneer laminated lumber made of eucalyptus is easy to deform and warp by means of drying, carbonizing and assembling of eucalyptus, softening of eucalyptus veneers and scientific and reasonable assembly. The veneer laminated lumber made of eucalyptus is stable in structure and not easy to warp, construction of planted forests can be promoted while wooden products having higher use value can be provided for the society, and reasonable and efficient utilization of small-diameter eucalyptus is achieved, which is significant in current situation of wood resource shortage and supply-demand contradiction.

Description

technical field [0001] The invention relates to a method for producing wood-based panels in the wood industry, in particular to a method for producing formaldehyde-free laminated veneer from eucalyptus. Background technique [0002] Laminated veneer lumber is a board formed by gluing veneers along the grain direction. It not only retains the natural characteristics of wood, but also has many characteristics that solid wood sawn timber does not have, and its static bending strength and elasticity along the grain The modulus is much higher than ordinary plywood. Fast-growing eucalyptus is widely planted in my country, and its proportion as a superior tree species for artificial high-yield forests is increasing year by year. However, fast-growing eucalyptus has short fibers and uneven internal density. It is prone to warping and deformation, so it is not used alone in the manufacture of laminated veneer lumber in actual production applications. However, if LVL can be produced ...

Claims

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Application Information

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IPC IPC(8): B27M1/08B27D1/08B27K1/00
Inventor 顾水祥庞小仁吴惠峰吕华
Owner ZHEJIANG SHENGHUA YUNFENG GREENEO
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