CN101659074B - Method for manufacturing weed wood and straw compounding medium density fiberboard with laminated structure - Google Patents
Method for manufacturing weed wood and straw compounding medium density fiberboard with laminated structure Download PDFInfo
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- CN101659074B CN101659074B CN2009101708702A CN200910170870A CN101659074B CN 101659074 B CN101659074 B CN 101659074B CN 2009101708702 A CN2009101708702 A CN 2009101708702A CN 200910170870 A CN200910170870 A CN 200910170870A CN 101659074 B CN101659074 B CN 101659074B
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Abstract
The invention relates to a method for manufacturing a weed wood and straw compounding medium density fiberboard with a laminated structure. The method adopts straw and weed wood as raw materials, and includes the following steps: the straw and the weed wood are respectively processed by defibration, and urea formaldehyde resin adhesive and waterproof agent are added, and in the process of formation, straw fibres and wood fibres are proportionally assembled and laminated in the direction of thickness and then are processed by thermocompression to form boards. The method has the advantages that proved by performance tests, the flexural modulus, the strength and the internal bonding strength of the medium density fiberboard, compared with a pure straw medium density fiberboard, are respectively and obviously increased under the same condition, and the expansion rate of water-absorbing thickness and the water absorption rate are lowered; and the relative performances of the compound material can be increased by changing the mode of lamination. The method efficiently and comprehensively utilizes the agricultural straws and saves wood resources, thereby protecting the ecological environment. The product can be applied to the occasions of furniture manufacturing and production, base materials for interior decoration, and the like.
Description
Technical field
What the invention belongs to is wood-based plate and technical field of composite materials, and what relate to is a kind of compound medium density fibre board (MDF) manufacturing process of weedtree/straw of layer structure.
Background technology
Be accompanied by the construction of china natural resources economizing type, friendly environment society, the utilization of agricultural straw resource more and more comes into one's own, and the development prospect of agricultural crop straw industry will be more and more wider also.The artificial board of straw industry is considered to one of main path of lot of consumption agricultural crop straw, and in numerous artificial board of straw products, stalk-shaving board, straw fiber board are two big series products of main exploitation.Through to the modification of stalk or the improvement of technology; The physical and mechanical property of stalk-shaving board and straw fiber board increases; But high-hygroscopicity that stalk-shaving board and fiberboard exist and low bond strength are one of bottlenecks that hinders this type of material popularization and use always.Therefore, adopt the intensity of reinforcing material raising rice straw fiber plate or the moisture absorption of adopting novel waterproofing agent to reduce the rice straw fiber plate that the scope of application of expanding artificial board of straw is had positive meaning.
Summary of the invention
The object of the invention: proposing with rice straw and weedtree is raw material; With the urea-formaldehyde resin adhesive is adhesive; Through rice straw, weedtree being carried out fiber separation, applying glue, interpolation waterproofing agent respectively, in forming process, on the slab thickness direction, wood-fibred, grass fiber being closed with the certain proportion layer and form; Then through cold pressing, hot pressing, cooling, cutting edge, sanding, process product.
Technical solution of the present invention: the compound medium density fiber board fabrication method of layer structure weedtree/straw; It is characterized in that with weedtree, straw be raw material, carry out fiber separation respectively, the weedtree fiber applies urea-formaldehyde resin adhesive and paraffin wax emulsions; Dry; Rice-straw fibre applies isocyanate glue and urea-formaldehyde resin adhesive, drying, in the forming process on the slab thickness direction with rice-straw fibre and wood-fibred by a certain percentage layer close the compound medium density fibre board (MDF) of mating formation, processing through precompressed and hot pressing then.
The compound medium density fiber board fabrication method of layer structure weedtree/straw: weedtree is processed chipping of 25-35mm through wood chipper; Send into feeding screw and carry out steam preheating, temperature is 120-150 ℃, and retention time is 3-5min; Feed the inherent steam pressure 0.8-1.0MPa of defibrator after the preheating and carry out fiber separation; Apply urea-formaldehyde resin adhesive 9-11%, paraffin wax emulsions 0.8-1.2% (mass ratio of ovendriedwood), drying; Straw is processed the particle of 20-40mm through pulverizer; Send into feeding screw and carry out steam preheating, temperature is 90-120 ℃, and retention time is 3-5min; Feed the inherent steam pressure 0.6-0.8MPa of defibrator after the preheating and carry out fiber separation; Apply isocyanate glue 0.8-1.2%, urea-formaldehyde resin adhesive 10-13% (mass ratio of over dry straw), drying.Wood-fibred that drying is good and grass fiber on the slab thickness direction according to the order on top layer-sandwich layer-top layer with wood (grass) fiber: grass (wood) fiber: wood (grass) fiber=15: 70: 15～30: 40: 30 carry out layer close mat formation, precompressed, hot pressing and post-processed, produce sheet material.
Advantage of the present invention: adopt straw, weedtree to carry out fiber separation, applying glue respectively and execute waterproofing agent; Assembly, the compound medium density fibre board (MDF) that forms through hot pressing by a certain percentage on thickness direction; Fully utilized agricultural crop straw, saved timber resources, preserved the ecological environment.Among the present invention; With the enhancement layer of wood fibre as the rice straw medium density fibre board (MDF); Can improve bending strength, surface abrasion resistance property and the presentation quality of composite; Adopt isocyanate glue as the waterproofing agent of rice straw fiber can improve composite bond strength, reduce hygroscopicity, adopt rice straw fiber can reduce the cost of composite as the sandwich layer of composite.
The performance test of the compound medium density fibre board (MDF) of layer structure weedtree/straw shows: compare with rice straw medium density fibre board (MDF) under the same terms, its bending modulus and intensity obviously improve, internal bond strength is improved, and thickness swelling rate reduces.Through the ratio and the position of rice-straw fibre and wood-fibred on the change slab thickness direction, can correspondingly improve a certain performance of composite.
Description of drawings
Accompanying drawing 1 is a process chart of the present invention.
The specific embodiment
Embodiment 1; Weedtree is processed chipping of 25-35mm through wood chipping equipment; Send into feeding screw and carry out steam preheating, temperature is that 120 ℃, retention time are 5min, feeds the inherent steam pressure 0.8MPa of defibrator after the preheating and carries out fiber separation; Apply urea-formaldehyde resin adhesive 10%, paraffin wax emulsions 1.0%, drying; Straw is processed the particle of 20-40mm through pulverizer; Send into feeding screw and carry out steam preheating, temperature is that 90 ℃, retention time are 5min, feeds the inherent steam pressure 0.6MPa of defibrator after the preheating and carries out fiber separation; Apply isocyanate glue 0.8%, urea-formaldehyde resin adhesive 12%, drying.Wood-fibred that drying is good and grass fiber on the slab thickness direction according to the order on top layer-sandwich layer-top layer with grass fiber: wood-fibred: grass fiber=20: 60: 20 carry out layer close mat formation, precompressed, hot pressing and post-processed, produce utmost point material.Performance of products is seen table 1.
The performance that the sheet material that table 1 prepares by instance 1 records
| Test performance | Measured value |
| Density | 0.82g/cm 3 |
| Internal bond strength | 0.32MPa |
| Bending strength | 28.8MPa |
| Bending modulus | 2893MPa |
| Thickness swelling rate | 19.4％ |
Embodiment 2; At the separating of rice-straw fibre and weedtree fiber, applying glue and waterproofing agent, drying process; Similar with embodiment 1; Difference be wood-fibred that drying is good and grass fiber on the slab thickness direction according to the order on top layer-sandwich layer-top layer with wood-fibred: grass fiber: wood-fibred=20: 60: 20 carry out layer close mat formation, precompressed, hot pressing and post-processed, produce sheet material.Performance of products is seen table 2.
The performance that the sheet material that table 2 prepares by instance 2 records
| Test performance | Measured value |
| Density | 0.78g/cm 3 |
| Internal bond strength | 0.15MPa |
| Bending strength | 29.7MPa |
| Bending modulus | 3248MPa |
| Thickness swelling rate | 40.5％ |
Embodiment 3; Weedtree is processed chipping of 25-35mm through wood chipper; Send into feeding screw and carry out steam preheating, temperature is that 150 ℃, retention time are 3min, feeds the inherent steam pressure 1.0MPa of defibrator after the preheating and carries out fiber separation; Apply urea-formaldehyde resin adhesive 11%, paraffin wax emulsions 0.8%, drying; Straw is processed the particle of 20-40mm through pulverizer; Send into feeding screw and carry out steam preheating, temperature is that 120 ℃, retention time are 3min, feeds the inherent steam pressure 0.8MPa of defibrator and carries out fiber separation; Apply isocyanate glue 1.0%, urea-formaldehyde resin adhesive 11%, drying.Wood-fibred that drying is good and grass fiber on the slab thickness direction according to the order on top layer-sandwich layer-top layer with grass fiber: wood-fibred: grass fiber=25: 50: 25 carry out layer close mat formation, precompressed, hot pressing and post-processed, produce sheet material.Performance of products is seen table 3.
The performance that the sheet material that table 3 prepares by instance 3 records
| Test performance | Measured value |
| Density | 0.82g/cm 3 |
| Internal bond strength | 0.24MPa |
| Bending strength | 22.1MPa |
| Bending modulus | 2119MPa |
| Thickness swelling rate | 29.0％ |
Embodiment 4; At the separating of rice-straw fibre and weedtree fiber, applying glue and waterproofing agent, drying process; Similar with embodiment 3; Difference be wood-fibred that drying is good and grass fiber on the slab thickness direction according to the order on top layer-sandwich layer-top layer with wood-fibred: grass fiber: wood-fibred=25: 50: 25 carry out layer close mat formation, precompressed, hot pressing and post-processed, produce sheet material.Performance of products is seen table 4.
The performance that the sheet material that table 4 prepares by instance 4 records
| Test performance | Measured value |
| Density | 0.82g/cm 3 |
| Internal bond strength | 0.16MPa |
| Bending strength | 33.8MPa |
| Bending modulus | 3839MPa |
| Thickness swelling rate | 31.9％ |
Claims (1)
1. compound medium density fiber board fabrication method of layer structure weedtree/straw, its characteristic may further comprise the steps:
1) raw material: it is to be raw material with weedtree, straw;
2) preparation is chipped: weedtree is processed the 25-35mm woodchip through wood chipper, straw is processed the 20-40mm crushed aggregates of straw through pulverizer;
3) preparation fiber: above-mentioned woodchip is sent into feeding screw carry out steam preheating, temperature is 120-150 ℃, and retention time is 3-5min; Feeding the inherent steam pressure of defibrator after the preheating is that 0.8-1.0MPa carries out fiber separation, applies urea-formaldehyde resin adhesive, resin added 9-11%; Apply paraffin wax emulsions; Dosage is 0.8-1.2%, and drying obtains lumber fibre; Above-mentioned crushed aggregates of straw is sent into feeding screw carry out steam preheating, temperature is 90-120 ℃, and retention time is 3-5min; Feeding the inherent steam pressure of defibrator is that 0.6-0.8MPa carries out fiber separation, applies isocyanate glue, and dosage is 0.8-1.2%; Apply urea-formaldehyde resin adhesive; Resin added 10-13%, drying obtains rice-straw fibre;
4) fibrage closes and mats formation: with the weedtree fiber of above-mentioned applying glue and rice-straw fibre on the slab thickness direction according to the order on top layer-sandwich layer-top layer with wood-fibred: grass fiber: wood-fibred=15: 70: 15～30: 40: 30 carries out layer and closes and mat formation; Perhaps grass fiber: wood-fibred: grass fiber=15: 70: 15～30: 40: 30 carries out layer and closes and mat formation precompressed;
5) hot pressing and post-processed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101708702A CN101659074B (en) | 2009-09-10 | 2009-09-10 | Method for manufacturing weed wood and straw compounding medium density fiberboard with laminated structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101708702A CN101659074B (en) | 2009-09-10 | 2009-09-10 | Method for manufacturing weed wood and straw compounding medium density fiberboard with laminated structure |
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| Publication Number | Publication Date |
|---|---|
| CN101659074A CN101659074A (en) | 2010-03-03 |
| CN101659074B true CN101659074B (en) | 2012-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009101708702A Expired - Fee Related CN101659074B (en) | 2009-09-10 | 2009-09-10 | Method for manufacturing weed wood and straw compounding medium density fiberboard with laminated structure |
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102672784B (en) * | 2011-03-15 | 2015-07-01 | 北京创源基业自动化控制技术研究所 | Middle-density fibre board and preparation method thereof |
| CN103264424A (en) * | 2013-05-28 | 2013-08-28 | 南京林业大学 | Method for manufacturing MDF by mixing and hot-grinding straw/wood raw materials |
| CN105082317B (en) * | 2014-05-04 | 2018-11-06 | 盛亚红 | A method of making composite plate using straw |
| CN104118016B (en) * | 2014-07-23 | 2016-05-04 | 连云港保丽森实业有限公司 | A kind of environmental protection inorganic flame-retardant complex fiber plate and production method thereof |
| CN104227819B (en) * | 2014-08-15 | 2016-05-18 | 东营正和木业有限公司 | The preparation method of reed fiber particieboard |
| CN105799033A (en) * | 2014-12-30 | 2016-07-27 | 廊坊华日家具股份有限公司 | Reed composite fiber board and manufacture method thereof |
| CN104960066B (en) * | 2015-06-15 | 2017-09-22 | 湖北益嘉林业发展有限公司 | A kind of grass tree structural slab and its production technology |
| CN105236926A (en) * | 2015-09-16 | 2016-01-13 | 谌萌 | Inorganic gluing non-wood plant wood based panel and preparation process thereof |
| CN106087587A (en) * | 2016-06-16 | 2016-11-09 | 铜陵锋帆彩色印务有限公司 | Cold insulation Honey comb like package carton and preparation method thereof |
| CN106087585A (en) * | 2016-06-16 | 2016-11-09 | 铜陵锋帆彩色印务有限公司 | High intensity Honey comb like package carton and preparation method thereof |
| CN106738187A (en) * | 2017-01-12 | 2017-05-31 | 宁波朴锐环保科技有限公司 | Wood particulate/weaving dead meal composite coining product and its manufacture method |
| CN106827157A (en) * | 2017-01-23 | 2017-06-13 | 刘应福 | A kind of method that molded door skin is produced with weedtree |
| CN115160813A (en) * | 2022-07-29 | 2022-10-11 | 胡蕾蕾 | Preparation method of degradable wood-plastic composite material |
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Application publication date: 20100303 Assignee: Jiangsu Huihong Yasen International Trade Co.,Ltd. Assignor: Nanjing Forestry University Contract record no.: 2018320000309 Denomination of invention: Method for manufacturing weed wood and straw compounding medium density fiberboard with laminated structure Granted publication date: 20120627 License type: Common License Record date: 20181114 |
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