CN100503191C - Method for fabricating composite building board from wood based cotton stalk - Google Patents
Method for fabricating composite building board from wood based cotton stalk Download PDFInfo
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- CN100503191C CN100503191C CNB2004101025977A CN200410102597A CN100503191C CN 100503191 C CN100503191 C CN 100503191C CN B2004101025977 A CNB2004101025977 A CN B2004101025977A CN 200410102597 A CN200410102597 A CN 200410102597A CN 100503191 C CN100503191 C CN 100503191C
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Abstract
The present invention relates to a production method of wood base cotton stalk composite artificial plate. It is characterized by that said method includes the following steps: controlling stalk cut length in 1.5-2.5cm; controlling water content of wood shavings in 15-20%; added quantity of wood shavings and fibre can be 0-100%, defining mixing ratio of wood shavings and fibre and making it be 1:3-3:1, in the hot-pressing process the hot-pressing temperature is 140-200deg.C, hot-pressing pressure is 2.5-4MPa and hot-pressing time is 15-30 min.
Description
Technical field
The present invention relates to a kind of manufacture method of composite building board from wood based cotton stalk.
Background technology
Cotton stalk is the residue of cotton production, and the annual cotton stalk that produces of China mainly is used as fuel for about 2,000 ten thousand tons at present, and a large amount of cotton stalks are not efficiently utilized.Cotton stalk mainly contains cellulose, hemicellulose and lignin to be formed, and is similar to the chemical composition of broadleaf.Because the present timber resource shortage of China, wood-based panel industry is used for producd fibers plate and particieboard, and there is lack of raw materials, if therefore cotton stalk can be used for the production of wood-based plate, not only can solve the problem of China's wood-based panel industry wood raw material shortage of resources, and, increased the income on the vast farmers land area of one unit for the efficient utilization of cotton stalk has searched out outlet.
China once adopted cotton stalk to be used for the raw materials for production of particieboard and the raw materials for production of wet-process fiber board in the latter stage eighties, did not see with cotton stalk and produced dry medium density fibreboard.But stopped production one after another afterwards, changing again and adopting timber is raw material, mainly is that the technology of being correlated with does not solve.Its technical problem underlying has two: the one, and owing to being difficult for cutting off when the slicing wood shavings, the crust that contains a large amount of bast fibers of cotton stalk forms numb shape coma, not only occluding device and transport pipeline, and the on fire and applying glue difficulty of mating formation easily; The 2nd, the particieboard of cotton stalk production and the thickness swelling rate of fiberboard are difficult to reach requirement, and above-mentioned two technical problem underlying cause China's none tame artificial board enterprise that adopts cotton stalk as raw materials for production still.
Summary of the invention
The manufacture method that the purpose of this invention is to provide a kind of composite building board from wood based cotton stalk, with the crops cotton stalk is primary raw material, with timber is auxiliary material, adopting Lauxite or cyanurotriamide modified urea resin is adhesive, produce a kind of homogeneous chipboard and fiberboard of composite artificial board, and cotton stalk can not form numb shape coma in the solution manufacturing process, and the particieboard of production and the thickness swelling rate of fiberboard reach requirement.
The present invention provides a kind of manufacture method of composite building board from wood based cotton stalk, and its step is,
One, cotton stalk cuts off, the moisture content of cotton stalk is controlled at 15-20% after, the segment that is cut into length and is 1.5-2.5cm is standby;
Two, flaking is the cotton stalk section of 15-20% with moisture content, adopts pulverizer to make the wood shavings particle, and its length is 0.3-25mm, and width is 1-10mm, and thickness is 0.3-5mm;
Three, drying adopts air-flowing type drying means and cylindrical drier, and cotton stalk wood shavings particle is carried out drying, and the baking temperature scope is 70-150 ℃, and dry final moisture content is 3-5%;
Four, screening, the cotton stalk that drying is good is sent into the siccative storehouse, and dry good wooden shavings particle 1:3-3:1 ratio is on request evenly mixed with cotton stalk wood shavings particle;
Five, applying glue with the cotton stalk of mixing and the even applying glue gummed of compound of wooden shavings particle, is added waterproofing agent, and the applying glue ratio of urea-formaldehyde glue or melamine modified urea-formaldehyde glue is 8-12%; The applied amount of waterproofing agent is 0.5-2%;
Six, mat formation, the compound after the applying glue is mated formation into the slab thickness of requirement;
Seven, hot pressing is carried out hot pressing with the slab that paves, and hot pressing temperature is controlled at 140-200 ℃, and hot pressing pressure is at 2-3.5Mpa, and hot pressing time is 12-30 second/mm sheet metal thickness;
Eight, cutting edge forms a kind of particieboard product.
The present invention provides a kind of manufacture method of composite building board from wood based cotton stalk, the steps include:
One, cotton stalk cuts off, the moisture content of cotton straw pavilion is controlled at 15-20% after, the segment that is cut into length and is 1.5-2.5cm is standby;
Two, flaking is the cotton stalk section of 15-20% with moisture content, adopts ring flaker or beater grinder to make the wood shavings particle, and its length is 0.3-25mm, and width is 1-10mm, and thickness is 0.3-5mm;
Three, drying adopts air-flowing type drying means and cylindrical drier, and cotton stalk wood shavings particle is carried out drying, and the baking temperature scope is 70-150 ℃, and dry final moisture content is 3-5%;
Four, screening, the cotton stalk that drying is good is sent into the siccative storehouse, dry good wooden shavings particle, 1:3-3:1 ratio is on request evenly mixed with cotton stalk wood shavings particle;
Five, applying glue with cotton stalk wood shavings particle and wooden shavings particle, is added waterproofing agent by difference applying glue gummed, and the applying glue ratio of urea-formaldehyde glue or melamine modified urea-formaldehyde glue is 8-12%; The applied amount of waterproofing agent is to mix in the cotton stalk wood shavings of timber on request ratio behind the 0.5-2%;
Six, mat formation, the compound after the applying glue is mated formation into the slab thickness of requirement;
Seven, hot pressing is carried out hot pressing with the slab that paves, and hot pressing temperature is controlled at 140-200 ℃, and hot pressing pressure is at 2-3.5Mpa, and hot pressing time is 12-30 second/mm sheet metal thickness;
Eight, cutting edge forms a kind of particieboard product.
The present invention provides a kind of manufacture method of composite building board from wood based cotton stalk, the steps include:
One, cotton stalk cuts off, the moisture content of cotton straw pavilion is controlled at 15-20% after, the segment that is cut into length and is 1.5-2.5cm is standby;
Two, defibrator process, cotton stalk after cutting off on request and wood chip ratio 1:3-3:1 on request mix and carry out heat grinding slurry, and the steam pressure of defibrator is 2-5kg/cm
2Prepared fibre length is 0.3-4mm;
Three, applying glue drying adopts defibrator process after dryer sizing and dry synchronous method to carry out, and waterproofing agent also applies at this moment; The resin added and the waterproofing agent applied amount of cotton stalk are respectively 10-14% and 1-2%, and the resin added of lumber fibre and waterproofing agent applied amount are respectively 8-12% and 0.5-1%, and the moisture content of the fiber after the applying glue is dried to 8-12%;
Four, mat formation, dry good compound after the applying glue is mated formation into the slab thickness of requirement;
Five, hot pressing, hot pressing temperature 140-200 ℃; Hot pressing pressure 2.5-4MPa; Hot pressing time is 15-30 second/mm;
Six, cutting edge forms a kind of fibreboard product.
The invention provides a kind of manufacture method of composite building board from wood based cotton stalk, the steps include:
One, cotton stalk cuts off, the moisture content of cotton stalk is controlled at 15-20% after, the segment that is cut into length and is 1.5-2.5cm is standby;
Two, the cotton stalk that cuts off is on request cut off in defibrator process and wood chip adopts two defibrators heat grinding slurry respectively, and the slurrying condition of cotton stalk is that steam pressure is 2-5kg/cm
2
Three, applying glue drying adopts defibrator process after dryer sizing and dry synchronous method to carry out, and waterproofing agent also applies at this moment; The resin added and the waterproofing agent applied amount of cotton stalk are respectively 10-14% and 1-2%, and the resin added of lumber fibre and waterproofing agent applied amount are respectively 8-12% and 0.5-1%, and the moisture content of the fiber after the applying glue is dried to 8-12%;
Four, mat formation, dry good compound after the applying glue is mated formation into the slab thickness of requirement;
Five, hot pressing, hot pressing temperature 140-200 ℃, hot pressing pressure 2.5-4MPa, hot pressing time are 15-30 second/mm;
Six, cutting edge forms another kind of fibreboard product.
The present invention can utilize cotton stalk fully, to alleviate the timber resources anxiety, keeps the ecological balance, the protection environment, and make the manufacturing cost of particieboard and fibreboard product reduce 10-20%.
Description of drawings
Fig. 1 a kind of particle boards to manufacturing flow chart of the present invention.
Fig. 2 another kind of particle boards to manufacturing flow chart of the present invention.
Fig. 3 a kind of fiberboard of the present invention is made flow chart.
Fig. 4 another kind of fiberboard of the present invention is made flow chart.
The specific embodiment
The first embodiment of the present invention is a kind of manufacture method (as shown in Figure 1) of particieboard:
One, cotton stalk cuts off: after the moisture content of cotton stalk was controlled at 15-20%, the segment that is cut into length and is 1.5-2.5cm was standby.
Two, flaking: with moisture content is that the cotton stalk section of 15-20% adopts ring flaker or beater grinder to make the wood shavings particle, and its length is 0.3-25mm, and width is 1-10mm, and thickness is 0.3-5mm.
Three, drying: adopt air-flowing type drying means and cylindrical drier, cotton stalk wood shavings particle is carried out drying, the baking temperature scope is 70-150 ℃, and dry final moisture content is 3-5%;
Four, screening: the cotton stalk that drying is good is sent into the siccative storehouse, and dry good wooden shavings particle can evenly mix with cotton stalk wood shavings particle by ratio 1:3-3:1 on request;
Five, applying glue: the cotton stalk of mixing and the even applying glue gummed of compound of wooden shavings particle are added waterproofing agent, and the applying glue ratio of urea-formaldehyde glue or melamine modified urea-formaldehyde glue is 8-12%; The applied amount of waterproofing agent is 0.5-2%;
Six, mat formation: the compound after the applying glue is mated formation into the slab thickness of requirement, can adopt air-flowing type method for paving or air-flow mechanical type method for paving (all belonging to routine techniques).
Seven, hot pressing: the slab that paves is sent into multidaylight press or single drylight presses or continuous flow press carry out hot pressing, hot pressing temperature is controlled at 140-200 ℃; Hot pressing pressure is at 2-3.5MPa; Hot pressing time is 12-30 second/mm sheet metal thickness;
Eight, cutting edge: form a kind of particieboard product.
The second embodiment of the present invention is the manufacture method (as shown in Figure 2) of another kind of particieboard:
One, cotton stalk cuts off: after the moisture content of cotton stalk was controlled at 15-20%, the segment that is cut into length and is 1.5-2.5cm was standby.
Two, flaking: with moisture content is that the cotton stalk section of 15-20% adopts ring flaker or beater grinder to make the wood shavings particle, and its length is 0.3-25mm, and width is 1-10mm, and thickness is 0.3-5mm.
Three, drying: adopt air-flowing type drying means and cylindrical drier that cotton stalk wood shavings particle is carried out drying, the baking temperature scope is 70-150 ℃, and dry final moisture content is 3-5%;
Four, screening: the cotton stalk that drying is good is sent into the siccative storehouse, dry good wooden shavings particle, can be at this moment on request ratio 1:3-3:1 evenly mix with cotton stalk wood shavings particle;
Five, applying glue: cotton stalk wood shavings particle and wooden shavings particle are added waterproofing agent by difference applying glue gummed, and the applying glue ratio of urea-formaldehyde glue or melamine modified urea-formaldehyde glue is 8-12%; After the applied amount of waterproofing agent is 0.5-2%; Mix in timber cotton stalk wood shavings ratio on request;
Six, mat formation: the compound after the applying glue is mated formation into the slab thickness of requirement, can adopt air-flowing type method for paving or air-flow mechanical type method for paving (all belonging to routine techniques);
Seven, hot pressing: the slab that paves is sent into multidaylight press or single drylight presses or continuous flow press carry out hot pressing, hot pressing temperature is controlled at 140-200 ℃; Hot pressing pressure is at 2-3.5MPa; Hot pressing time is 12-30 second/mm sheet metal thickness;
Eight, cutting edge forms another kind of particieboard product.
The third embodiment of the present invention is a kind of manufacture method (as shown in Figure 3) of fiberboard:
One, cotton stalk cuts off, the moisture content of cotton stalk is controlled at 15-20% after, the segment that is cut into length and is 1.5-2.5cm is standby;
Two, defibrator process mixes the cotton stalk after cutting off on request and wood chip 1:3-3:1 ratio on request and carries out heat grinding slurry, and the steam pressure of defibrator is 2-5kg/cm
2, prepared fibre length is 0.3-4mm;
Three, applying glue drying adopts defibrator process after dryer sizing and dry synchronous method to carry out, and waterproofing agent also applies at this moment; The resin added and the waterproofing agent applied amount of cotton stalk are respectively 10-14% and 1-2%, and the resin added of lumber fibre and waterproofing agent applied amount are respectively 8-12% and 0.5-1%, and the moisture content of the fiber after the applying glue is dried to 8-12%;
Four, mat formation, dry good compound after the applying glue is mated formation into the slab thickness (common process) of requirement;
Five, hot pressing, hot pressing temperature 140-200 ℃; Hot pressing pressure 2.5-4MPa; Hot pressing time: 15-30 second/mm;
Six, cutting edge forms a kind of fibreboard product.
The fourth embodiment of the present invention is the manufacture method (as shown in Figure 4) of another kind of fiberboard:
One, cotton stalk cuts off, the moisture content of cotton straw pavilion is controlled at 15-20% after, the segment that is cut into length and is 1.5-2.5cm is standby;
Two, defibrator process is cut off the cotton stalk that cuts off on request and wood chip, adopts two defibrators heat grinding slurry respectively; The slurrying condition of cotton stalk is that steam pressure is 2-5kg/cm
2, the defibrator process condition of wood chip is a routine techniques;
Three, applying glue drying adopts defibrator process after dryer sizing and dry synchronous method to carry out, and waterproofing agent also applies at this moment; The resin added and the waterproofing agent applied amount of cotton stalk are respectively 10-14% and 1-2%, and the resin added of lumber fibre and waterproofing agent applied amount are respectively 8-12% and 0.5-1%, and the moisture content of the fiber after the applying glue is dried to 8-12%;
Four, mat formation, dry good compound after the applying glue is mated formation into the slab thickness (common process) of requirement;
Five, hot pressing, hot pressing temperature 140-200 ℃, hot pressing pressure 2.5-4MPa, hot pressing time: 15-30 second/mm;
Six, cutting edge forms another kind of fibreboard product.
The present invention's advantage compared with prior art:
1, adopt the cheap cotton stalk of a kind of wide material sources as raw materials for production.
2, by to the moisture content control of raw material and the control of cotton stalk shearing length, eliminated of the influence of cotton stalk bast fiber to wood shavings preparation and heat grinding slurry technology.
3, make particieboard and fiberboard by timber being mixed with cotton stalk use, solved the technical problem that can only adopt single raw material making sheet, make two kinds of raw materials complement one another, improved the too high problem of the cotton stalk water absorption rate of simple usefulness.
The present invention has solved above-mentioned two problems by adopting new technique:
Moisture content during the first, by control straw pavilion shearing length and slicing wood shavings solves the cotton stalk phloem fiber influences the production problem, concrete enforcement is as follows: adopt drum-type cutting machine and special-purpose chaffcutter to be cut into length at 1.5-2.5cm, moisture content during cut-out must be controlled at 15-20%, strictness is controlled moisture content at 15-20% when flaking then, the wood shavings of Zhi Zaoing can be eliminated by the conglomeration of cotton stalk bast fiber and cause the phenomenon of producing difficulty in process of production like this.
The second, by in the wood shavings of cotton stalk or fiber, sneaking into the method for wooden shavings and lumber fibre, solve the simple problem of using the cotton stalk fiber to influence the sheet material physical property, and the ratio that wood particle and fiber mix with cotton stalk wood shavings and fibre (1:3-3:1).
Claims (4)
1, a kind of manufacture method of composite building board from wood based cotton stalk, the step of its feature is:
One, cotton stalk cuts off, the moisture content of cotton stalk is controlled at 15-20% after, the segment that is cut into length and is 1.5-2.5cm is standby;
Two, flaking is the cotton stalk section of 15-20% with moisture content, adopts pulverizer to make the wood shavings particle, and its length is 0.3-25mm, and width is 1-10mm, and thickness is 0.3-5mm;
Three, drying adopts air-flowing type drying means and cylindrical drier, and cotton stalk wood shavings particle is carried out drying, and the baking temperature scope is 70-150 ℃, and dry final moisture content is 3-5%;
Four, screening, the cotton stalk that drying is good is sent into the siccative storehouse, and dry good wooden shavings particle 1:3-3:1 ratio is on request evenly mixed with cotton stalk wood shavings particle;
Five, applying glue with the cotton stalk of mixing and the even applying glue gummed of compound of wooden shavings particle, is added waterproofing agent, and the applying glue ratio of urea-formaldehyde glue or melamine modified urea-formaldehyde glue is 8-12%; The applied amount of waterproofing agent is 0.5-4%;
Six, mat formation, the compound after the applying glue is mated formation into the slab thickness of requirement;
Seven, hot pressing is carried out hot pressing with the slab that paves, and hot pressing temperature is controlled at 140-200 ℃, and hot pressing pressure is at 2-3.5Mpa, and hot pressing time is 12-30 second/mm sheet metal thickness.
Eight, cutting edge forms a kind of particieboard product.
2, according to the manufacture method of the described composite building board from wood based cotton stalk of claim 1, it is characterized by:
In the described step 2, flaking adopts ring flaker or beater grinder to make the wood shavings particle;
In the described step 5 applying glue process, with cotton stalk wood shavings particle and wooden shavings particle, by difference applying glue gummed, add waterproofing agent, the applying glue ratio of urea-formaldehyde glue or melamine modified urea-formaldehyde glue is 8-12%; The applied amount of waterproofing agent is 0.5-2%, and then, the cotton stalk wood shavings of timber on request ratio mixes again.
3, a kind of manufacture method of composite building board from wood based cotton stalk, the step of its feature be,
One, cotton stalk cuts off, the moisture content of cotton stalk is controlled at 15-20% after, the segment that is cut into length and is 1.5-2.5cm is standby;
Two, defibrator process, cotton stalk after cutting off on request and wood chip ratio 1:3-3:1 on request mix and carry out heat grinding slurry, and the steam pressure of defibrator is 2-5kg/cm
2, prepared fibre length is 0.3-4mm;
Three, applying glue drying adopts defibrator process after dryer sizing and dry synchronous method to carry out, and waterproofing agent also applies at this moment; The resin added and the waterproofing agent applied amount of cotton stalk are respectively 10-14% and 1-2%, and the resin added of lumber fibre and waterproofing agent applied amount are respectively 8-12% and 0.5-1%, and the moisture content of the fiber after the applying glue is dried to 8-12%;
Four, mat formation, dry good compound after the applying glue is mated formation into the slab thickness of requirement;
Five, hot pressing, hot pressing temperature 140-200 ℃; Hot pressing pressure 2.5-4MPa; Hot pressing time is 15-30 second/mm;
Six, cutting edge forms a kind of fibreboard product.
4, a kind of manufacture method of composite building board from wood based cotton stalk, the step of its feature be,
One, cotton stalk cuts off, the moisture content of cotton stalk is controlled at 15-20% after, the segment that is cut into length and is 1.5-2.5cm is standby;
Two, the cotton stalk that cuts off is on request cut off in defibrator process and wood chip adopts two defibrators heat grinding slurry respectively, and the slurrying condition of cotton stalk is that steam pressure is 2-5kg/cm
2
Three, applying glue drying adopts defibrator process after dryer sizing and dry synchronous method to carry out, and waterproofing agent also applies at this moment; The resin added and the waterproofing agent applied amount of cotton stalk are respectively 10-14% and 1-2%, and the resin added of lumber fibre and waterproofing agent applied amount are respectively 8-12% and 0.5-1%, and the moisture content of the fiber after the applying glue is dried to 8-12%;
Four, mat formation, dry good compound after the applying glue is mated formation into the slab thickness of requirement;
Five, hot pressing, hot pressing temperature 140-200 ℃, hot pressing pressure 2.5-4MPa, hot pressing time are 15-30 second/mm;
Six, cutting edge forms another kind of fibreboard product.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004101025977A CN100503191C (en) | 2004-12-28 | 2004-12-28 | Method for fabricating composite building board from wood based cotton stalk |
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| CNB2004101025977A CN100503191C (en) | 2004-12-28 | 2004-12-28 | Method for fabricating composite building board from wood based cotton stalk |
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| CN100503191C true CN100503191C (en) | 2009-06-24 |
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| CN100429057C (en) * | 2007-04-28 | 2008-10-29 | 南京林业大学 | Method for manufacturing fiberboard of cotton stalk in middle density through dry process |
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| CN104029271B (en) * | 2014-06-26 | 2016-05-18 | 绥阳兴翰轮盘制造有限公司 | A kind of processing method of sorghum stalk particieboard |
| CN105235044A (en) * | 2014-07-09 | 2016-01-13 | 高云 | Manufacturing method for wood-based cotton stalk composite artificial board |
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| CN115609721A (en) * | 2022-11-01 | 2023-01-17 | 佳诺威集团股份有限公司 | Low-formaldehyde-emission fiberboard and production method thereof |
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