CN102514057A - Method for making non-formaldehyde laminated veneer lumber from gum wood - Google Patents
Method for making non-formaldehyde laminated veneer lumber from gum wood Download PDFInfo
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- CN102514057A CN102514057A CN2012100046612A CN201210004661A CN102514057A CN 102514057 A CN102514057 A CN 102514057A CN 2012100046612 A CN2012100046612 A CN 2012100046612A CN 201210004661 A CN201210004661 A CN 201210004661A CN 102514057 A CN102514057 A CN 102514057A
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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
The present invention relates to a kind of production method of timber industry wood-based plate, particularly a kind of method of not having the aldehyde laminated veneer lumber with the Eucalyptus manufacturing.
Background technology
Laminated veneer lumber is a veneer with the rift grain direction is the sheet material that main assembly gummed forms, and has not only kept the natural characteristic of timber, also has the unexistent characteristics of many solid wood sawn timbers, and its rift grain MOR and elastic modelling quantity are all far above common glued board.It is extensive in China's cultivated area that speed is given birth to Eucalyptus; As the superior seeds of artificial fast-growing andhigh-yeilding trees at home proportion increase year by year; The Eucalyptus fiber is short, the timber internal density is inhomogeneous but speed is given birth to; With it is the laminated veneer lumber that raw material is made, and buckling deformation takes place extremely easily, thereby in the production application of reality, be not used for the manufacturing of laminated veneer lumber separately.But if can use the Eucalyptus fast growing wood to produce laminated veneer lumber; Not only can promote the construction of artificial forest; And can be the timber product that society provides higher use value; Solve artificial forest small diameter grade Eucalyptus and rationally efficiently utilize problem, under the situation that this is in short supply at current timber resources, imbalance between supply and demand is severe day by day, have very important significance.
The most common laminated veneer lumber is made for board using poplar board mostly in the market, and also useful China fir is made.Yet the density and hardness of poplar, China fir is all not as good as Eucalyptus, thus adopt the Eucalyptus veneer to make that laminated veneer lumber can be superior to poplar on physical and mechanical property, China fir is made, and poplar, China fir do not have advantage yet on price, cost.But because the shortcoming of the material of Eucalyptus own, the laminated veneer lumber of production has bigger buckling deformation, all some problems can occur in the application facet of following process and sheet material.Do not produce laminated veneer lumber so in reality is produced, generally do not adopt Eucalyptus.
Summary of the invention
The present invention has overcome the deficiency that exists in the above-mentioned prior art; What a kind of technology advantages of simple was provided does not have the method for aldehyde laminated veneer lumber with the Eucalyptus manufacturing; The present invention handles through the Eucalyptus veneer being carried out softening, has discharged the inherent strain of Eucalyptus veneer basically, simultaneously through scientific and reasonable assemble pattern; Solution is made laminated veneer lumber with Eucalyptus and is occurred the buckling deformation problem easily; And adhesive adopts the timber of formaldehydeless base to use the composite modified starch adhesive, makes the formaldehydeless release of Eucalyptus laminated veneer lumber, becomes environmentally friendly product.
Technical scheme of the present invention is achieved in that
A kind of do not have the method for aldehyde laminated veneer lumber with the Eucalyptus manufacturing, comprises following operation:
1., with middle small diameter grade Eucalyptus log through rotary-cut, cut that to process thickness be that 1.5mm～3.0mm, length are that 800～1400mm, width are the Eucalyptus veneer of 320mm～640mm; 2., the Eucalyptus veneer is dried in dryer, the veneer moisture content is controlled at below 12%; 3., place hot press to carry out softening veneer and handle, temperature is 100～135 ℃, and pressure is 0.8mpa～1mpa, and the time is 1～2min; 4., with the veneer after the softening processing, use starch adhesive, carry out cloth glue at cloth glue machine, cloth glue amount is controlled at two-sided 300～320g/ square metre; 5., assembly: with the Eucalyptus veneer of the good glue of cloth, with 5～10 layers be one group, it is the slab of 12mm～24mm that assembly becomes thickness; 6., the sheet material that assembly is good carries out precompressed, and preload pressure is 0.8mpa～1.0mpa, squeeze time 1.5h～2h; 7., after precompressed, slab is carried out hot pressing, heat pressing process is: pressure is 1.2MPa, 120 ℃ of temperature, time 30min; 8.,, after 5 days health, carry out sawing, promptly obtain the laminated veneer lumber that thickness is 17mm through sanding again according to desired book size with the sheet material after the hot pressing.
As preferably; In the assembly operation; Be that band is arranged along the veneer length direction with the second layer and layer second from the bottom in every group of veneer, other layer is perpendicular line and arranges and carry out assembly, splices and joint between adjacent two layers intersects and staggers along the veneer width.
As preferably, in the assembly operation, the grain direction of all veneers is perpendicular line and arranges along its length.
Adopted the invention has the beneficial effects as follows of technique scheme:
The present invention passes through to the processing of Eucalyptus tenderizing veneer sheets and through scientific and reasonable assemble pattern; When having solved Eucalyptus manufacturing laminated veneer lumber, the laminated veneer lumber that makes the Eucalyptus manufacturing problem of distortion and warpage appears easily; Stability Analysis of Structures is difficult for warpage; Not only can promote the construction of artificial forest, and can be the timber product that society provides higher use value, solve artificial forest small diameter grade Eucalyptus and rationally efficiently utilize problem; This is in short supply at current timber resources, under the situation of imbalance between supply and demand, important meaning is arranged.Simultaneously, adhesive adopts the composite modified starch adhesive of no aldehyde, makes production environment and environment for use all obtain protection, is perplexed by " formaldehyde " never again, has promoted the sustainable development of industry, has realized favorable economic benefit and social benefit.
Description of drawings
Fig. 1 is the assembly structural representation of Eucalyptus veneer in the embodiment of the invention 1;
Fig. 2 is the assembly structural representation of Eucalyptus veneer among the embodiment 2.
The specific embodiment
The specific embodiment of the present invention is following:
Embodiment 1: a kind of do not have the method for aldehyde laminated veneer lumber with the Eucalyptus manufacturing, comprises following operation:
1., with middle small diameter grade Eucalyptus log through rotary-cut, cut that to process thickness be that 2.4mm, length are that 1270mm, width are the Eucalyptus veneer of 320mm or 640mm;
2., the Eucalyptus veneer is dried in dryer, the veneer moisture content is controlled at below 12%;
3., place hot press to carry out softening veneer and handle, temperature is 110 ℃, and pressure is 0.8mpa, and the time is 2min;
4., with the veneer after the softening processing, use starch adhesive, carry out cloth glue at cloth glue machine, cloth glue amount is controlled at two-sided 300g/ square metre; The proportioning of starch adhesive and be prepared in the patent No. and be: record to some extent in the patent document of CN201010171082.8.
5., assembly: with the Eucalyptus veneer of the good glue of cloth, be one group with 8 layers, as shown in Figure 1, the grain direction of all veneers is perpendicular line and arranges along its length, and it is the slab of 12mm～24mm that assembly becomes thickness;
6., the sheet material that assembly is good carries out precompressed, and preload pressure is 0.8mpa～1.0mpa, squeeze time 1.5h;
7., after precompressed, slab is carried out hot pressing, heat pressing process is: pressure is 1.2MPa, 120 ℃ of temperature, time 30min;
8.,, after 5 days health, carry out sawing, promptly obtain the laminated veneer lumber that thickness is 17mm through sanding again according to desired book size with the sheet material after the hot pressing.
Embodiment 2: a kind of do not have the method for aldehyde laminated veneer lumber with the Eucalyptus manufacturing, comprises following operation:
1., with middle small diameter grade Eucalyptus log through rotary-cut, cut that to process thickness be that 3.0mm, length are that 1300mm, width are the Eucalyptus veneer of 320mm or 640mm;
2., the Eucalyptus veneer is dried in dryer, the veneer moisture content is controlled at below 12%;
3., place hot press to carry out softening veneer and handle, temperature is 125 ℃, and pressure is 1mpa, and the time is 1min;
4., with the veneer after the softening processing, use starch adhesive, carry out cloth glue at cloth glue machine, cloth glue amount is controlled at two-sided 320g/ square metre; The proportioning of starch adhesive and be prepared in the patent No. and be: record to some extent in the patent document of CN201010171082.8.
5.; Assembly: with the Eucalyptus veneer of the good glue of cloth, be one group with 8 layers, as shown in Figure 2; Be that band is arranged along the veneer length direction with the second layer and layer second from the bottom in every group of veneer; Other layer is perpendicular line and arranges and carry out assembly, splices and joint between adjacent two layers intersects and staggers along the veneer width, and it is the slab of 12mm～24mm that assembly becomes thickness;
6., the sheet material that assembly is good carries out precompressed, and preload pressure is 1.0mpa, squeeze time 1.5h;
7., after precompressed, slab is carried out hot pressing, heat pressing process is: pressure is 1.2MPa, 120 ℃ of temperature, time 30min;
8.,, after 5 days health, carry out sawing, promptly obtain the laminated veneer lumber that thickness is 17mm through sanding again according to desired book size with the sheet material after the hot pressing.
The laminated veneer lumber that obtains is pressed GB/T20241 " laminated veneer lumber ", the detection of LY/T 1738-2008 " solid wooden compound floor is used base material " standard-required, and its result is:
MOR: 55.68MPa
Elastic modelling quantity: 5941.53MPa
Angularity: 0.12%
Burst size of methanal: 0.02mg/l
Dipping disbonded test: qualified
The resulting Eucalyptus laminated veneer lumber of above instance all meets the requirements of the standard.
Claims (3)
1. one kind is not had the method for aldehyde laminated veneer lumber with the Eucalyptus manufacturing, it is characterized in that:
1., with middle small diameter grade Eucalyptus log through rotary-cut, cut that to process thickness be that 1.5mm～3.0mm, length are that 800～1400mm, width are the Eucalyptus veneer of 320mm～640mm;
2., the Eucalyptus veneer is dried in dryer, the veneer moisture content is controlled at below 12%;
3., place hot press to carry out softening veneer and handle, temperature is 100～135 ℃, and pressure is 0.8mpa～1mpa, and the time is 1～2min;
4., with the veneer after the softening processing, use starch adhesive, carry out cloth glue at cloth glue machine, cloth glue amount is controlled at two-sided 300～320g/ square metre;
5., assembly: with the Eucalyptus veneer of the good glue of cloth, with 5～10 layers be one group, it is the slab of 12mm～24mm that assembly becomes thickness;
6., the sheet material that assembly is good carries out precompressed, and preload pressure is 0.8mpa～1.0mpa, squeeze time 1.5h～2h;
7., after precompressed, slab is carried out hot pressing, heat pressing process is: pressure is 1.2MPa, 120 ℃ of temperature, time 30min;
8.,, after 5 days health, carry out sawing, promptly obtain the laminated veneer lumber that thickness is 17mm through sanding again according to desired book size with the sheet material after the hot pressing.
2. a kind of method of not having the aldehyde laminated veneer lumber with the Eucalyptus manufacturing according to claim 1; It is characterized in that: in the assembly operation; Be that band is arranged along the veneer length direction with the second layer and layer second from the bottom in every group of veneer; Other layer is perpendicular line and arranges and carry out assembly, splices and joint between adjacent two layers intersects and staggers along the veneer width.
3. according to claim 1 a kind ofly do not have the method for aldehyde laminated veneer lumber with the Eucalyptus manufacturing, it is characterized in that: in the assembly operation, the grain direction of all veneers is perpendicular line and arranges along its length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012100046612A CN102514057A (en) | 2012-01-09 | 2012-01-09 | Method for making non-formaldehyde laminated veneer lumber from gum wood |
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| CN2012100046612A CN102514057A (en) | 2012-01-09 | 2012-01-09 | Method for making non-formaldehyde laminated veneer lumber from gum wood |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104924373A (en) * | 2015-06-12 | 2015-09-23 | 柳州市骏马木业有限公司 | Preparation method of environmentally-friendly high-performance eucalyptus plywood |
| CN104942905A (en) * | 2015-06-12 | 2015-09-30 | 柳州市骏马木业有限公司 | Method for manufacturing environment-friendly high-performance eucalyptus plywood |
| CN104942909A (en) * | 2015-06-12 | 2015-09-30 | 柳州市骏马木业有限公司 | Method for manufacturing environment-friendly eucalyptus plywood |
| CN104942906A (en) * | 2015-06-12 | 2015-09-30 | 柳州市骏马木业有限公司 | Method for processing environment-friendly high-performance eucalyptus plywood |
| CN104960042A (en) * | 2015-06-12 | 2015-10-07 | 柳州市骏马木业有限公司 | Method for producing high-performance environment-friendly eucalyptus plywood |
| CN105108839A (en) * | 2015-09-08 | 2015-12-02 | 河北北方绿野居住环境发展有限公司 | Wood composite board |
| CN105171853A (en) * | 2015-06-12 | 2015-12-23 | 柳州市骏马木业有限公司 | Production method for environmental-friendly high-performance eucalyptus plywood |
| CN105965617A (en) * | 2016-05-23 | 2016-09-28 | 宁波中加低碳新技术研究院有限公司 | Fabrication method for veneer based external wall panels |
| CN106013715A (en) * | 2016-05-09 | 2016-10-12 | 南京林业大学 | A composite floor board produced by using eucalypt wood laminated veneer lumber and a preparation process therefor |
| CN107088931A (en) * | 2017-05-08 | 2017-08-25 | 贵港市鑫宏木业有限公司 | The preparation method of insect prevention wood plywood |
| CN107097306A (en) * | 2017-05-08 | 2017-08-29 | 贵港市鑫宏木业有限公司 | A kind of preparation method of wardrobe wood plywood |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105171853A (en) * | 2015-06-12 | 2015-12-23 | 柳州市骏马木业有限公司 | Production method for environmental-friendly high-performance eucalyptus plywood |
| CN104942905A (en) * | 2015-06-12 | 2015-09-30 | 柳州市骏马木业有限公司 | Method for manufacturing environment-friendly high-performance eucalyptus plywood |
| CN104942909A (en) * | 2015-06-12 | 2015-09-30 | 柳州市骏马木业有限公司 | Method for manufacturing environment-friendly eucalyptus plywood |
| CN104942906A (en) * | 2015-06-12 | 2015-09-30 | 柳州市骏马木业有限公司 | Method for processing environment-friendly high-performance eucalyptus plywood |
| CN104960042A (en) * | 2015-06-12 | 2015-10-07 | 柳州市骏马木业有限公司 | Method for producing high-performance environment-friendly eucalyptus plywood |
| CN104924373A (en) * | 2015-06-12 | 2015-09-23 | 柳州市骏马木业有限公司 | Preparation method of environmentally-friendly high-performance eucalyptus plywood |
| CN105108839A (en) * | 2015-09-08 | 2015-12-02 | 河北北方绿野居住环境发展有限公司 | Wood composite board |
| CN105108839B (en) * | 2015-09-08 | 2017-12-12 | 河北北方绿野居住环境发展有限公司 | wood composite board |
| CN106013715A (en) * | 2016-05-09 | 2016-10-12 | 南京林业大学 | A composite floor board produced by using eucalypt wood laminated veneer lumber and a preparation process therefor |
| CN106013715B (en) * | 2016-05-09 | 2019-09-20 | 南京林业大学 | A kind of preparation process of the composite floor board of Eucalyptus laminated veneer lumber production |
| CN105965617A (en) * | 2016-05-23 | 2016-09-28 | 宁波中加低碳新技术研究院有限公司 | Fabrication method for veneer based external wall panels |
| CN107088931A (en) * | 2017-05-08 | 2017-08-25 | 贵港市鑫宏木业有限公司 | The preparation method of insect prevention wood plywood |
| CN107097306A (en) * | 2017-05-08 | 2017-08-29 | 贵港市鑫宏木业有限公司 | A kind of preparation method of wardrobe wood plywood |
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Application publication date: 20120627 |