CN101524866A - Manufacturing method of straw/wood recombined material - Google Patents
Manufacturing method of straw/wood recombined material Download PDFInfo
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- CN101524866A CN101524866A CN200810084289A CN200810084289A CN101524866A CN 101524866 A CN101524866 A CN 101524866A CN 200810084289 A CN200810084289 A CN 200810084289A CN 200810084289 A CN200810084289 A CN 200810084289A CN 101524866 A CN101524866 A CN 101524866A
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Abstract
The invention discloses a method for producing an environment-friendly plate by renewable straw/wood recombination, which comprises the steps of raw material processing, paving (gluing), hot pressing, saw blade recombination, hot re-hot pressing and finished product treatment, and is characterized in that: cleaning and screening crop straws, removing outer skins, cooking, drying, and cutting into straw sections. After rolling, paving the adjacent layers of the glued straw sections in an orthogonal mode, hot-pressing to prepare a plate with good mechanical property and processability, sawing into sheets, combining the sheets in an orthogonal mode, gluing, and hot-pressing to prepare the plate with better mechanical property. The invention has the advantages of sufficient raw materials, high plate quality and production efficiency, high strength, light weight and environmental protection.
Description
Technical field
The present invention relates to a kind of method of producing environment-friendly sheet, relate in particular to a kind of technical method that utilizes the production of renewable stalk (sorghum stalk, cornstalk etc.) and poplar (or other timber) not contain the recombination board of harmful adhesive such as formaldehyde.
Background technology
People utilized renewable stalk to produce sheet material in the past, according to the mode of production straw board were divided into particieboard and fiberboard, and main production method is stalk to be made particle or extracted stalk fibre form with adhesive hot pressing.This project is not destroyed the original natural form of stalk, through after the dry process, is adhesive with isocyanates, is the recombination board that formaldehydeless release, high-strength, lightweight layer are manufactured out in splicing with the poplar.
Summary of the invention
A kind of manufacture method of renewable straw/wood recombination board, production method comprises: raw material is processed, is mated formation, applying glue hot pressing first, saw blade reorganization, applying glue hot pressing once more, finished product treatment step, it is characterized in that: raw material processing: garbled agricultural crop straw is cut into stalk section, remove outer epidermis then, softening, drying rolls.Mat formation: the stalk section of mating formation in mould, the direction of mating formation of adjacent layer differ 90 degree, promptly are orthogonal mutually and mat formation, and apply adhesive simultaneously, upper surface and lower surface with thin wood plate as splicing layer.Hot pressing first: the slab after will mating formation carries out hot pressing, and the levels pressing plate all uses releasing agent, pressurize then.The saw blade reorganization: is faying face with the sheet material after the hot pressing first with the timber splicing layer, and applying glue is bonding, is sawn into sheet material then, again two sheet materials is recombinated coating adhesive and hot pressing, pressurize then between the sheet material with the orthogonal manner stack.Finished product is handled: with sheet material cooling, splicing, cutting edge, the sanding of applying glue hot pressing once more.
Preferred agricultural crop straw section to mat formation with the 15-20 layer be a unit, it is that the poplar thin plate of 0.8-1.2mm is as the splicing layer that upper surface and lower surface are respectively spread a layer thickness again.
Described agricultural crop straw is sorghum stalk or cornstalk.
Described stalk segment length 120-150cm.
Described softening in 100-120 ℃ of boiling water, to boil 20-30min.
Described drying for dry to moisture content be 10%-15%.
Described mould is a groove-shaped mold.
Described adhesive is isocyanate adhesive, and resin added is 3%-5%.
Slab after will mating formation carries out in the process of hot pressing: hot pressing pressure 2-4MPa, hot pressing time 20-30min, dwell time 15-20min, hot pressing temperature 100-120 ℃.
The thickness of described sheet material is 5-7mm.
Described sheet material with orthogonal manner stack reorganization, has remedied the difference of stalk material along the different directions performance by sheet material, has improved the mechanical property of material.
The performance of the renewable straw/wood recombination board that the employing said method is produced is as follows: density is 0.6-1.0g/cm
3, MOR is 18-25MPa, and MOE is 2.5-4GPa, and thickness swelling is below 5%.
Simultaneously, the inventor obviously is better than other by the performance of discovering the renewable straw/wood recombination board that the following parameter of employing is produced:
Raw material adds man-hour: described agricultural crop straw is a sorghum stalk, and described agricultural crop straw segment length 130cm is described softening for boiling 30min in 100 ℃ of boiling water, described drying for dry to moisture content be 12%;
When mating formation, described mould is a groove-shaped mold, and described adhesive is an isocyanate adhesive, and resin added is 4.5%, the agricultural crop straw section mat formation with 15 layers be a unit, upper surface and lower surface are respectively spread the poplar thin plate of one deck 0.8-1.2mm thickness again;
During hot pressing first, the hot pressing pressure that the slab after will mating formation carries out hot pressing is 2-4MPa, hot pressing time 30min, dwell time 15min, 110 ℃ of hot pressing temperatures;
During the saw blade reorganization, described sheet thickness is 5mm; Between the sheet material once more during applying glue hot pressing: hot pressing pressure is 0.2-0.5MPa, hot pressing time 30min, dwell time 15min, 110 ℃ of hot pressing temperatures.
Its performance is as shown in table 1:
| Project | Performance |
| Density (g/cm 3) | 0.6-1.0 |
| Sheet metal thickness (mm) | 10,20 or 30 |
| MOR(MPa) | 18-25 |
| MOE(GPa) | 2.5-4 |
| Internal bond strength (MPa) | ≥0.5 |
| Thickness swelling (%) | ＜5％ |
| Nail-holding ability (N) | ≥600 |
| Anti-flammability | Difficult combustion B1 level (according to JIS A1321 standard) |
| Formaldehyde discharges | 0.0mg/L |
| Sound sees through loss (dB) | 35 |
| Freeze-thaw resistance | 200 freeze thawing circulation is no abnormal |
| Pyroconductivity (kcal/mh ℃) | 0.12 |
Description of drawings
Accompanying drawing 2 is structural representations of the sheet material of hot pressing first
Accompanying drawing 3 is board material splice schematic diagrames of hot pressing first
Accompanying drawing 4 will be sawn into the sheet material schematic diagram behind the board material splice of hot pressing first
Accompanying drawing 5 is sheet structure schematic diagrames
Accompanying drawing 6 is sheet material reorganization schematic diagrames of applying glue hot pressing once more
Accompanying drawing 7 is plate construction schematic diagrames of applying glue hot pressing once more
Among the figure 1, stalk, 2, the poplar thin plate, 3, sheet material, 4, two sheet materials are mutually 90 degree stacks
The specific embodiment
Provide specific embodiment below in conjunction with accompanying drawing.
Raw material processing: the agricultural crop straw that will clean, screens cuts into stalk section, and stalk segment length 120-150cm removes outer epidermis.In 100-120 ℃ of boiling water, boil 20-30min, dry to moisture content be 10%-15%, roll.
Mat formation (applying glue): the stalk section of mating formation in a groove-shaped mold, the direction of mating formation of adjacent layer differ 90 degree, promptly are orthogonal mutually and mat formation, and apply the self-control isocyanate adhesive simultaneously, and resin added is 3%-5%; The agricultural crop straw section to mat formation with the 15-20 layer be a unit, it is that the poplar thin plate of 0.8-1.2mm is as the splicing layer that upper surface and lower surface are respectively spread a layer thickness again.As shown in Figure 1.
Hot pressing first: the slab after will mating formation carries out hot pressing, and the levels pressing plate all uses releasing agent, hot pressing pressure 2-4MPa, hot pressing time 20-30min, dwell time 15-20min, hot pressing temperature 100-120 ℃.Obtain the sheet material of hot pressing first, as shown in Figure 2.
The saw blade reorganization: is faying face with the sheet material after the hot pressing with poplar splicing layer, and applying glue is bonding, and the bonding number of plies is 3 layers, as shown in Figure 3.Be sawn into the sheet material that thickness is 5-7mm along length or width then, as Fig. 4 and shown in Figure 5.Then two sheet materials are mutually 90 degree, promptly with orthogonal manner stack reorganization, two-layer between gluing hot pressing, hot pressing pressure 0.2-0.5MPa, hot pressing time 30min, dwell time 15min, hot pressing temperature 100-120 ℃, obtain the sheet material of applying glue hot pressing once more, as Fig. 6 and shown in Figure 7.
Finished product is handled: with sheet material cooling, cutting edge, the sanding of hot repressing.
Gained agricultural crop straw recombination board mechanical property is as shown in table 2:
Table 2 agricultural crop straw recombination board mechanical property
| Project | Performance |
| Density (g/cm 3) | 0.6-0.8 |
| Sheet metal thickness (mm) | 10 |
| MOR(MPa) | 18-20 |
| MOE(GPa) | 3-4 |
| Internal bond strength (MPa) | 0.5 |
| Thickness swelling (%) | 2％ |
| Nail-holding ability (N) | 600 |
| Formaldehyde discharges | 0.0mg/L |
Raw material processing: the sorghum stalk that will clean, screens cuts into stalk section, and stalk segment length 150cm removes outer epidermis.In 100 ℃ of boiling water, boil 30min, dry to moisture content be 12%, roll.
Mat formation (applying glue): the stalk section of mating formation in a groove-shaped mold, the direction of mating formation of adjacent layer differ 90 degree, promptly are orthogonal mutually and mat formation, and apply the self-control isocyanate adhesive that is added with fire retardant simultaneously, and resin added is 4.5%.
The sorghum stalk stalk section mat formation with 15 layers be a unit, it is that the poplar thin plate of 1mm is as splicing layer that upper surface and lower surface are respectively spread a layer thickness again.
Hot pressing: the slab after will mating formation carries out hot pressing, and the levels pressing plate all uses releasing agent, hot pressing pressure 2.5MPa, hot pressing time 30min, dwell time 15min, 110 ℃ of hot pressing temperatures.
The saw blade reorganization: is faying face with the sheet material after the hot pressing with poplar splicing layer, applying glue is bonding, be sawn into the sheet material that thickness is 5mm then, again two sheet materials are recombinated with the orthogonal manner stack, gluing hot pressing between two-layer, hot pressing pressure 0.3MPa, hot pressing time 30min, dwell time 15min, 110 ℃ of hot pressing temperatures.
Finished product is handled: with sheet material cooling, cutting edge, the sanding of hot repressing.
Advantages such as that this sheet material has is high-strength, lightweight, fire-retardant, environmental protection.
Claims (10)
1, a kind of manufacture method of renewable straw/wood recombination board comprises that raw material is processed, mated formation, hot pressing first, saw blade reorganization, applying glue hot pressing once more, finished product treatment step, it is characterized in that:
Raw material processing: agricultural crop straw is cut into the agricultural crop straw section, remove outer epidermis then, softening, drying rolls;
Mat formation: the agricultural crop straw section of in mould, mating formation, the direction of mating formation of adjacent layer differs 90 degree and promptly is orthogonal mutually and mats formation, and applies adhesive, mats formation with Duan Weiyi unit of 15-20 layer agricultural crop straw, the upper surface of unit and lower surface all with thin wood plate as splicing layer, obtain slab;
Hot pressing first: the slab that obtains of will mating formation carries out hot pressing first, and the levels pressing plate all uses releasing agent, and pressurize then obtains the sheet material of hot pressing first;
The saw blade reorganization: the sheet material of hot pressing is first spliced in the applying glue of timber splicing layer place, be sawn into sheet material then, two sheet materials are recombinated with the orthogonal manner stack, applying glue hot pressing once more between the sheet material, pressurize then obtains the sheet material of applying glue hot pressing once more;
Finished product is handled: with sheet material cooling, splicing, cutting edge, the sanding of applying glue hot pressing once more.
2, the manufacture method of renewable according to claim 1 straw/wood recombination board is characterized in that: the thin wood plate as the splicing layer of the upper surface of unit and lower surface all is that thickness is the poplar thin plate of 0.8-1.2mm.
3, the manufacture method of renewable as claimed in claim 1 or 2 straw/wood recombination board is characterized in that: described agricultural crop straw is sorghum stalk or cornstalk.
4, as the manufacture method of renewable straw/wood recombination board as described in the claim 3, it is characterized in that: described softening in 100-120 ℃ of boiling water, to boil 30-60min.
5, as the manufacture method of renewable straw/wood recombination board as described in the claim 4, it is characterized in that: described adhesive is isocyanate adhesive, and resin added is 3%-5%.
6, as the manufacture method of renewable straw/wood recombination board as described in the claim 5, it is characterized in that: the slab that obtains of will mating formation carries out in the process of hot pressing first: hot pressing pressure 2-4MPa, hot pressing time are 20-30min, dwell time to be 15-20min, hot pressing temperature 100-120 ℃.
7, as the manufacture method of renewable straw/wood recombination board as described in the claim 6, it is characterized in that: the thickness of described sheet material is 5-7mm.
8, as the manufacture method of renewable straw/wood recombination board as described in the claim 7, it is characterized in that: between the sheet material once more during applying glue hot pressing: hot pressing pressure 0.2-0.5MPa, hot pressing time 20-30min, dwell time are 15-20min, hot pressing temperature 100-120 ℃.
9, the manufacture method of renewable according to claim 1 straw/wood recombination board is characterized in that:
Raw material adds man-hour: described agricultural crop straw is a sorghum stalk, and described agricultural crop straw segment length 130cm is described softening for boiling 30min in 100 ℃ of boiling water, described drying for dry to moisture content be 12%;
When mating formation, described mould is a groove-shaped mold, and described adhesive is an isocyanate adhesive, and resin added is 4.5%, the agricultural crop straw section mat formation with 15 layers be a unit, upper surface and lower surface are respectively spread one deck poplar thin plate again;
During hot pressing first, the hot pressing pressure that the slab that obtains of will mating formation carries out hot pressing is 2-4MPa, hot pressing time 30min, dwell time 15min, 110 ℃ of hot pressing temperatures;
During the saw blade reorganization, described sheet thickness is 5mm; Between the sheet material once more during applying glue hot pressing: hot pressing pressure is 0.2-0.5MPa, hot pressing time 30min, dwell time 15min, 110 ℃ of hot pressing temperatures.
10, adopt the reorganization material of making as the manufacture method of renewable straw/wood recombination board as described in the claim 9, it is characterized in that: the performance of the renewable straw/wood recombination board of being produced is as follows: density is 0.6-1.0g/cm
3MOR is 18-25MPa, MOE is 2.5-4GPa, internal bond strength 〉=0.5MPa, thickness swelling＜5%, nail-holding ability 〉=600N, anti-flammability reaches difficult combustion B1 level, and formaldehyde is released to 0, and sound sees through loss and is 35dB, 200 freeze thawing of freeze-thaw resistance circulation is no abnormal, and pyroconductivity is 0.12kcal/mh ℃.
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| CN200810084289A CN101524866A (en) | 2008-03-31 | 2008-03-31 | Manufacturing method of straw/wood recombined material |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102172929A (en) * | 2011-01-11 | 2011-09-07 | 刘金忠 | Technique for producing wood bundle board by using straws |
| CN102172933A (en) * | 2011-01-16 | 2011-09-07 | 刘金忠 | Process for producing straw artificial board |
| RU2446045C2 (en) * | 2010-06-15 | 2012-03-27 | Государственное образовательное учреждение высшего профессионального образования "Тихоокеанский государственный университет" | Method of producing glued laminar material from reduced wood |
| CN102581917A (en) * | 2012-03-08 | 2012-07-18 | 浙江农林大学 | Scrimber comprising wood wool rod units and manufacturing method |
| CN102717413A (en) * | 2012-06-27 | 2012-10-10 | 上海交通大学 | Method for comprehensive utilization of sweet wormwood herb straws |
| CN103406972A (en) * | 2013-07-16 | 2013-11-27 | 福建农林大学 | Banana stalk scrimber and manufacturing method thereof |
| CN103770186A (en) * | 2014-01-16 | 2014-05-07 | 福建农林大学 | Kenaf staggered-layer structural wood and manufacturing method thereof |
| CN107555901A (en) * | 2017-09-08 | 2018-01-09 | 肇庆高新区恒泰信息服务有限公司 | A kind of method that building board is made using solid waste |
| CN107696214A (en) * | 2017-11-03 | 2018-02-16 | 沈阳金博地生态环保科技有限公司 | A kind of straw board and preparation method thereof |
| CN111225778A (en) * | 2017-10-16 | 2020-06-02 | 瑞士克罗诺泰克股份公司 | Method and device for producing a wood composite panel |
| CN116852484A (en) * | 2023-05-22 | 2023-10-10 | 江苏洛基木业有限公司 | Straw veneer and preparation method thereof |
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- 2008-03-31 CN CN200810084289A patent/CN101524866A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2446045C2 (en) * | 2010-06-15 | 2012-03-27 | Государственное образовательное учреждение высшего профессионального образования "Тихоокеанский государственный университет" | Method of producing glued laminar material from reduced wood |
| CN102172929A (en) * | 2011-01-11 | 2011-09-07 | 刘金忠 | Technique for producing wood bundle board by using straws |
| CN102172933A (en) * | 2011-01-16 | 2011-09-07 | 刘金忠 | Process for producing straw artificial board |
| CN102581917A (en) * | 2012-03-08 | 2012-07-18 | 浙江农林大学 | Scrimber comprising wood wool rod units and manufacturing method |
| CN102581917B (en) * | 2012-03-08 | 2013-11-06 | 浙江农林大学 | Manufacturing method of scrimber comprising wood wool rod units |
| WO2014000596A1 (en) * | 2012-06-27 | 2014-01-03 | 上海交通大学 | Comprehensive utilization method of herba artemisiae annuae straw and use thereof |
| CN102717413A (en) * | 2012-06-27 | 2012-10-10 | 上海交通大学 | Method for comprehensive utilization of sweet wormwood herb straws |
| CN103406972A (en) * | 2013-07-16 | 2013-11-27 | 福建农林大学 | Banana stalk scrimber and manufacturing method thereof |
| CN103406972B (en) * | 2013-07-16 | 2015-05-06 | 福建农林大学 | Banana stalk scrimber and manufacturing method thereof |
| CN103770186A (en) * | 2014-01-16 | 2014-05-07 | 福建农林大学 | Kenaf staggered-layer structural wood and manufacturing method thereof |
| CN107555901A (en) * | 2017-09-08 | 2018-01-09 | 肇庆高新区恒泰信息服务有限公司 | A kind of method that building board is made using solid waste |
| CN111225778A (en) * | 2017-10-16 | 2020-06-02 | 瑞士克罗诺泰克股份公司 | Method and device for producing a wood composite panel |
| CN107696214A (en) * | 2017-11-03 | 2018-02-16 | 沈阳金博地生态环保科技有限公司 | A kind of straw board and preparation method thereof |
| CN116852484A (en) * | 2023-05-22 | 2023-10-10 | 江苏洛基木业有限公司 | Straw veneer and preparation method thereof |
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Open date: 20090909 |