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Method for making non-formaldehyde laminated veneer lumber from gum wood

A technology of laminated veneer lumber and eucalyptus, which is applied to the jointing of wooden veneers, manufacturing tools, and wood layered products, etc., can solve problems such as warping and deformation, and achieve structures that are not easy to warp, high use value, Good economic and social benefits

Inactive Publication Date: 2012-06-27
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 internal stress of the eucalyptus veneer is solved, and at the same time, the problem of warping and deformation of the veneer laminated lumber made of eucalyptus is solved through a scientific and reasonable billet formation method, and the adhesive is a formaldehyde-free composite modified starch adhesive for wood. Make eucalyptus laminated veneer lumber free of formaldehyde and become an environmentally friendly product

Method used

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  • Method for making non-formaldehyde laminated veneer lumber from gum wood
  • Method for making non-formaldehyde laminated veneer lumber from gum wood
  • Method for making non-formaldehyde laminated veneer lumber from gum wood

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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, put the veneer in a hot press for softening treatment, the temperature is 110°C, the pressure is 0.8mpa, and the time is 2min;

[0019] ④, use starch adhesive on veneer after softening treatment, 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 the patent documents.

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

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, Put the veneer in a hot press for softening treatment, the temperature is 125°C, the pressure is 1mpa, and the time is 1min;

[0028] ④, apply starch adhesive to the veneer after softening treatment, 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 the patent documents.

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

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Abstract

The invention discloses a method for making a non-formaldehyde laminated veneer lumber from gum wood. The invention solves the problems of deformation and warpage which are easy to generate when the laminated veneer lumber is made from the gum wood mainly by carrying out drying, softening and assembling treatment on the gum wood and carrying out softening treatment on a gum wood veneer through a scientific and reasonable assembling mode, so that the laminated veneer lumber made from the gum wood has a stable structure and is difficult to warp. Not only can the construction of artificial forest be promoted, but also the wood product with high value can be provided for the society, the problem of reasonably and efficiently utilizing the small diameter-class gum wood in the artificial forest is solved, and the method has great significance under the current situations of shortage of wood resources and supply and 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): B27D1/08B32B21/13B32B21/14B32B37/06B32B37/10
Inventor 顾水祥庞小仁吴惠峰吕华
Owner ZHEJIANG SHENGHUA YUNFENG GREENEO
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