CN102172948A - Surface infiltrated wood fiber board and production method thereof - Google Patents
Surface infiltrated wood fiber board and production method thereof Download PDFInfo
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- CN102172948A CN102172948A CN2011100310201A CN201110031020A CN102172948A CN 102172948 A CN102172948 A CN 102172948A CN 2011100310201 A CN2011100310201 A CN 2011100310201A CN 201110031020 A CN201110031020 A CN 201110031020A CN 102172948 A CN102172948 A CN 102172948A
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Abstract
The invention discloses a surface infiltrated wood fiber board and a production method thereof. Composite design is performed by adopting the advantages of dry and wet production processes of the wood fiber board; and the method has the following flows of: chipping, screening, digestion, hot grinding, separation, drying, air spreading, surface infiltration, pre-pressing, hot pressing molding, edging, inspection and formation of a finished product. In the digestion, the pressure of steam is 0.55 to 0.68MPa, and the time is 3 to 5 minutes; in the drying, the temperature of airflow is 180 to 280 DEG C, and the time is 5 to 10 seconds; and in the hot pressing molding, the temperature is 190 to 230 DEG C, the pressure is 3.5 to 6.5MPa, and the time is 30 to 50s/mm. The method produces the waterproof, flame-retardant and common hard fiber board; in the production process, the energy consumption is low, and no waste water is discharged; the wood fiber board has high strength and good uniformity; the quality of the wood fiber board reaches the standards of GB12626.1-12626.9-90 Hard Fiber Board; a brand-new method is provided for the production of the wood fiber board; and the method has good economic benefit and social benefit.
Description
Technical field
The present invention relates to wood fibre board's technical field, specifically a kind of surface infiltration wood fibre board and production method thereof.
Background technology
Wood fibre board is the wood-based plate that is interweaved moulding and utilized its intrinsic glueability to make by wood fibre, and the elementary cell of forming fiberboard is wood fibre or the fibre bundle that separates.
The wood fibre board production technology divides three kinds of wet method, dry method and semidry methods.Wet process technique is with the carrier of water as fiber transport, and its mechanism is to utilize to be interweaved between the fiber to produce to produce adhesion and fiber between frictional force, the fiber surface molecule and contain the fiberboard of making certain intensity under the effect of bond etc. of deposits yields.Dry technology for production is the fiber transport carrier with the air, and fiber production is to use the first separation method, generally without correct grinding, need apply adhesive, and fiber is wanted drying before the slab moulding, is hot pressed into no longer heat treatment usually behind the plate, and other technologies are identical with wet method.The semidry method production technology is also used air forming, and fiber is drying and keep high-moisture percentage not, uses no or little sizing material.
Wood fibre panel products major part is the medium density fibre board (MDF) of producing with dry process at present, and fraction is a hardboard with wet processing production, and semidry method is eliminated owing to technical process is difficult to control.
With the basic technology content of the medium density fibre board (MDF) of dry production is fiber separation → apply adhesive → fiber drying → airflow pavement moulding → precompressed → hot pressing.Because the medium density fibre board (MDF) with dry production need apply adhesive, cause product in the middle of use, can produce environmental pollution, and now more and more higher to the green technology index request of wood fibre panel products, make manufacturing enterprise face the increasing pressure.Many enterprises are all the breach of adhesive modification as technological transformation, but because that the dry process production line technical flow design exists is structural incompatible, make that the technological innovation space of adhesive modification is very little, thereby most of enterprise has a disconcerting prospect in face of technology barriers.
Hardboard basic technology content with wet production is fiber separation → slurry processing → slab moulding → hot pressing → post-processed etc.At first being fiber separation, claiming slurrying again, is that pulping raw material is separated into fiber, defibration method is earlier raw material to be handled with hot water or saturated vapor, make the fiber intercellular layer softening or be partly dissolved, under normal pressure or condition of high voltage, be separated into fiber, finish grind through disk refiner again through mechanical force, the fiber pulp that this method is produced, fiber shape is complete, and interweaving property is strong, and drainability is good, the yield height, power consumption is little; Fiber length after finish grinding shortens, and specific area increases, outer and end brooming, and the imbibition raising, softness, plasticity increases, and interweaving property is good.Next is that slurry is handled.Promptly according to product purpose, carry out waterproof, enhancing, processing such as fire-resistant and anticorrosion respectively, to improve the relevant performance of finished product.The 3rd is wet moulding, uses the low concentration slurry, forms slab through dewatering gradually, and its method adopts fourdrinier forming.Fourdrinier paper machine is similar in fourdrinier forming device therefor and the paper industry.1.2 the slurry of～2.0% concentration is copied fourdrinier wire from flow box, through dewatering by dead weight, vacuum dehydration, roller press dewatering and form wet mat, moisture content is 65～70%.The 4th is hot pressing, and needing with pressure during the hot pressing of wet production hardboard is 5MPa, and used temperature is 200～220 ℃.Wet-process fiber board needs to handle through heat treatment and damping after hot pressing.Wet production has not had profit space, many places to forbid strictly to produce under the pressure of environmental protection owing to there is sewage handling problem.
Summary of the invention
The objective of the invention is:, provide a kind of surface infiltration wood fibre board and production method thereof for solving the deficiency of existing wood fibre board production technology.
Technical scheme of the present invention is:
The production method of surface infiltration wood fibre board, be fiber separation, the fiber separation that applies the hardboard of adhesive, fiber drying, airflow pavement moulding, precompressed, hot pressing process and wet production, slurry processing, slab moulding, the effective combination of hot pressing process of adopting the medium density fibre board (MDF) of dry production, wood fibre board's technological process of production is redesigned, and its technological process of production is as follows: chip → screen → boiling → defibrator process → fiber separation → fiber drying → airflow pavement → surface infiltration → precompressed → hot-forming → edging → check → finished product.
The present invention is achieved in that
A kind of surface infiltration wood fibre board, its composition comprises that wood fibre, water are or/and waterproofing agent or fire retardant, its parts by weight are: 0～3 part of 83～90 parts of wood fibres, 26～36 parts in water, 0～4 part of waterproofing agent and fire retardant, described waterproofing agent is a phenolic resin glue, and described fire retardant is a ferrous ammonium phosphate.
The production method of surface infiltration wood fibre board comprises boiling, defibrator process, separation, drying, mats formation, surface infiltration, precompressed and hot-briquetting modeling process, and processing step comprises:
1. chip raw material timber is cut into long 15～25 millimeters, thick 2～4 millimeters, wide 10～20 millimeters thin slice with wood chipping equipment.
2. screening is removed underproof chip with wood chip with 10～20 order vibratory sieves.
3. boiling is with wood chip saturated vapor boiling, and digestion time is set according to the moisture content of wood chip and the specification factor of wood chip.
4. defibrator process will be separated into wood fibre with defibrator with wood chip through the wood chip of boiling.
5. the dry chimneying drying means that adopts of dry wood fibre, controlling dried wood fibre moisture content is 8～10%.
6. mat formation and adopt airflow pavement machine or mechanical spreading machine, dried wood fibre is layered on moulding on the plate blank conveyer.
7. surface infiltration is on the plate blank conveyer pipeline, and the use solution atomization sprays to wood fibre slab surface, allows the wood fibre surface infiltration.
8. precompressed will make the infiltration of wood fibre slab inside more even through the wood fibre slab precompressed of surface infiltration.
9. hot-forming wood fibre slab after the precompressed is carried out hot pressing with hot press, cooling, and press finished product specification saw limit with cutting machine, check promptly to obtain surface infiltration wood fibre board finished product.
Above-described boiling, the employing steam pressure is 0.55～0.68MPa, digestion time is 3～5 minutes.
Above-described drying, control pneumatic conveying drying temperature is 180～280 ℃, the time is 5～10 seconds.
Above-described surface infiltration, the employing aqueous solution sprays, the amount of spraying is 30～40: 100 with dried wood fibre weight ratio, according to the requirement of wood fibre board's product purpose, or adds the waterproofing agent phenolic resin glue or/and the fire retardant ferrous ammonium phosphate in aqueous solution.
Above-described precompressed, the control temperature is an indoor temperature, and the precompressed mode is a continuous rolling, and the average line pressure of precompressed is 800～1200N/cm.
Above-described hot-forming, the control temperature is 190～230 ℃, and pressure is 3.5～6.5MPa, and the time is 30～50s/mm.
Advantage of the present invention and good effect:
1. surface infiltration wood fibre board of the present invention and production method thereof when wood fibre separates in defibrator process, need not apply adhesive, the fiber moisture after the separation is significantly reduced, thereby reduce dry heat energy loss, and energy-saving effect is obvious.
2. the dried wood fibre of the inventive method, it is the pure wood fibre that does not contain adhesive, the wood fibre shape is complete, internal friction power between wood fibre is little, make the airflow pavement good forming effect, wood fibre is uniformly dispersed, and interweaving property is strong, can increase the intensity and the material uniformity of wood fibre board, improve the quality and the class of wood fibre panel products.
3. the wood fibre surface infiltration of the inventive method, be to be adsorbed on the wood fibre surface by the aqueous solution atomizing, the hydrone of solution infiltrates the inside of wood fibre tissue gradually, and the additive of solution such as waterproofing agent, fire retardant etc., then be adsorbed on the wood fibre surface equably, when the moisture content of wood fibre during a little more than fibre saturated point, the situation of fibre mat in hot-forming process is identical with the hot-forming effect of wet process technique.Formed certain bond strength closely being interweaved together, producing between the wood fibre surface molecular bond that adhesion and wood-fibred inclusion produce etc. under the condition of temperature and pressure between the wood fibre, and additive such as waterproofing agent, fire retardant etc. have then formed the overcoat of wood fibre board.
4. the wood fibre board of this method production is equal to protection type (waterproof, the fire-retardant) hardboard of producing with the wet processing method, does not have discharge of wastewater in the production process, does not have sewage handling problem.
Description of drawings
Fig. 1 is a process flow diagram of the present invention.
The specific embodiment
Below in conjunction with embodiment a kind of surface infiltration wood fibre board of the present invention and production method thereof are done following detailed description the in detail.
Embodiment 1:
One, feed intake composition and parts by weight: 2 parts of 85 parts of wood fibres, 30 parts in water, 3 parts of phenolic resin glues and ferrous ammonium phosphates.
Two, production method:
Raw material timber is cut into long 20 millimeters, thick 4 millimeters, wide 20 millimeters thin slice with wood chipping equipment, and removes underproof chip with 20 order vibratory sieves.With wood chip saturated vapor boiling, steam pressure is 0.60MPa, and digestion time is 5 minutes.To with defibrator wood chip be separated into wood fibre through the wood chip of boiling.With 250 ℃ of chimneying drying machine control temperature, 8 seconds time, dried wood fibre moisture content is 10%.Adopt the airflow pavement machine that dried wood fibre is layered on moulding on the plate blank conveyer.In aqueous solution, add phenolic resin glue and ferrous ammonium phosphate, the aqueous solution atomizing is sprayed to wood fibre slab surface soak into.Will be through the wood fibre slab precompressed of surface infiltration, the control temperature is an indoor temperature, and the precompressed mode is a continuous rolling, and the average line pressure of precompressed is 1150N/cm, makes the infiltration of wood fibre slab inside more even.With the wood fibre slab after the precompressed, to carry out hot-formingly with hot press, the control temperature is 210 ℃, and pressure is 6MPa, and the time is 45s/mm, cooling, and press finished product specification saw limit with cutting machine, check promptly to obtain surface infiltration wood fibre board finished product.
Waterproof, flame-retardant hard fiberboard that this example is produced, energy consumption is low in the production process, does not have discharge of wastewater, does not have sewage handling problem.Product reaches the operative norm of GB12626.1～12626.9-90 " hardboard ".
Embodiment 2:
One, feed intake composition and parts by weight: 4 parts of 85 parts of wood fibres, 27 parts in water and phenolic resin glues.
Two, production method:
Raw material timber is cut into long 15 millimeters, thick 4 millimeters, wide 15 millimeters thin slice with wood chipping equipment, and removes underproof chip with 10 order vibratory sieves.With wood chip saturated vapor boiling, steam pressure is 0.55MPa, and digestion time is 5 minutes.To with defibrator wood chip be separated into wood fibre through the wood chip of boiling.With 280 ℃ of chimneying drying machine control temperature, 6 seconds time, dried wood fibre moisture content is 8%.Adopt mechanical spreading machine that dried wood fibre is layered on moulding on the plate blank conveyer.In aqueous solution, add phenolic resin glue, the aqueous solution atomizing is sprayed to wood fibre slab surface soak into.Will be through the wood fibre slab precompressed of surface infiltration, the control temperature is an indoor temperature, and the precompressed mode is a continuous rolling, and the average line pressure of precompressed is 1000N/cm, makes the infiltration of wood fibre slab inside more even.With the wood fibre slab after the precompressed, to carry out hot-formingly with hot press, the control temperature is 200 ℃, and pressure is 4MPa, and the time is 50s/mm, cooling, and press finished product specification saw limit with cutting machine, check promptly to obtain surface infiltration wood fibre board finished product.
The water-proof hard fiberboard that present embodiment is produced, energy consumption is low in the production process, does not have discharge of wastewater, does not have sewage handling problem.Product reaches the operative norm of GB12626.1～12626.9-90 " hardboard ".
Embodiment 3:
One, feed intake composition and parts by weight: 3 parts of 87 parts of wood fibres, 34 parts in water and ferrous ammonium phosphates.
Two, production method:
Raw material timber is cut into long 25 millimeters, thick 2 millimeters, wide 20 millimeters thin slice with wood chipping equipment, and removes underproof chip with 20 order vibratory sieves.With wood chip saturated vapor boiling, steam pressure is 0.68MPa, and digestion time is 3 minutes.To with defibrator wood chip be separated into wood fibre through the wood chip of boiling.With 180 ℃ of chimneying drying machine control temperature, 10 seconds time, dried wood fibre moisture content is 9%.Adopt the airflow pavement machine that dried wood fibre is layered on moulding on the plate blank conveyer.In aqueous solution, add ferrous ammonium phosphate, the aqueous solution atomizing is sprayed to wood fibre slab surface soak into.Will be through the wood fibre slab precompressed of surface infiltration, the control temperature is an indoor temperature, and the precompressed mode is a continuous rolling, and the average line pressure of precompressed is 950N/cm, makes the infiltration of wood fibre slab inside more even.With the wood fibre slab after the precompressed, to carry out hot-formingly with hot press, the control temperature is 230 ℃, and pressure is 6.5MPa, and the time is 30s/mm, cooling, and press finished product specification saw limit with cutting machine, check promptly to obtain surface infiltration wood fibre board finished product.
The flame-retardant hard fiberboard that present embodiment is produced, energy consumption is low in the production process, does not have discharge of wastewater, does not have sewage handling problem.Product reaches the operative norm of GB12626.1～12626.9-90 " hardboard ".
Embodiment 4:
One, feed intake composition and parts by weight: 32 parts in 90 parts of wood fibres and water.
Two, production method:
Raw material timber is cut into long 22 millimeters, thick 4 millimeters, wide 15 millimeters thin slice with wood chipping equipment, and removes underproof chip with 10 order vibratory sieves.With wood chip saturated vapor boiling, steam pressure is 0.68MPa, and digestion time is 5 minutes.To with defibrator wood chip be separated into wood fibre through the wood chip of boiling.With 250 ℃ of chimneying drying machine control temperature, 7 seconds time, dried wood fibre moisture content is 8.5%.Adopt mechanical spreading machine that dried wood fibre is layered on moulding on the plate blank conveyer.Aqueous solution atomizing sprayed to wood fibre slab surface soak into.Will be through the wood fibre slab precompressed of surface infiltration, the control temperature is an indoor temperature, and the precompressed mode is a continuous rolling, and the average line pressure of precompressed is 900N/cm, makes the infiltration of wood fibre slab inside more even.With the wood fibre slab after the precompressed, to carry out hot-formingly with hot press, the control temperature is 190 ℃, and pressure is 3.5MPa, and the time is 50s/mm, cooling, and press finished product specification saw limit with cutting machine, check promptly to obtain surface infiltration wood fibre board finished product.
The hardboard that present embodiment is produced, energy consumption is low in the production process, does not have discharge of wastewater, does not have sewage handling problem.Product reaches the operative norm of GB12626.1～12626.9-90 " hardboard ".
Claims (7)
1. surface infiltration wood fibre board, it is characterized in that: its composition comprises that wood fibre, water are or/and waterproofing agent or fire retardant, its parts by weight are: 0～3 part of 83～90 parts of wood fibres, 26～36 parts in water, 0～4 part of waterproofing agent and fire retardant, described waterproofing agent is a phenolic resin glue, and described fire retardant is a ferrous ammonium phosphate.
2. the production method of surface infiltration according to claim 1 wood fibre board, it is characterized in that: the fiber separation that adopts the medium density fibre board (MDF) of dry production, apply adhesive, fiber drying, the airflow pavement moulding, precompressed, the fiber separation of the hardboard of hot pressing process and wet production, slurry is handled, the slab moulding, the hot pressing process combination, wood fibre board's technological process of production is redesigned, and its technological process of production is as follows: chip → screen → boiling → defibrator process → fiber separation → fiber drying → airflow pavement → surface infiltration → precompressed → hot-forming → edging → check → finished product;
Described chipping is that raw material timber is cut into long 15～25 millimeters, thick 2～4 millimeters, wide 10～20 millimeters thin slice with wood chipping equipment;
Described screening is that wood chip is removed underproof chip with 10～20 order vibratory sieves;
Described boiling is with wood chip saturated vapor boiling, and digestion time is set according to the moisture content of wood chip and the specification factor of wood chip;
Described defibrator process is that the wood chip through boiling is isolated wood fibre with defibrator with wood chip;
Described drying is the dry chimneying drying means that adopts of wood fibre, and controlling dried wood fibre moisture content is 8～10%;
Described to mat formation be to adopt airflow pavement machine or mechanical spreading machine, and dried wood fibre is layered on integer on the plate blank conveyer;
Described surface infiltration is on the plate blank conveyer pipeline, and the use solution atomization sprays to wood fibre slab surface, soaks into wood fibre;
Described precompressed is with the wood fibre slab precompressed through surface infiltration, makes the infiltration of wood fibre slab inside more even;
Described hot-forming be with the wood fibre slab after the precompressed, carry out hot pressing with hot press, cooling, and press finished product specification saw limit with cutting machine is checked promptly to obtain surface infiltration wood fibre board finished product.
3. the production method of surface infiltration according to claim 2 wood fibre board is characterized in that: described boiling, and the employing steam pressure is 0.55～0.68MPa, digestion time is 3～5 minutes.
4. the production method of surface infiltration according to claim 1 wood fibre board is characterized in that: described drying, and control pneumatic conveying drying temperature is 180～280 ℃, the time is 5～10 seconds.
5. the production method of surface infiltration according to claim 2 wood fibre board, it is characterized in that: described surface infiltration, the employing aqueous solution sprays, the amount of spraying is 30～40: 100 with dried wood fibre weight ratio, according to the requirement of wood fibre board's product purpose, or in aqueous solution, add the waterproofing agent phenolic resin glue or/and the fire retardant ferrous ammonium phosphate.
6. the production method of surface infiltration according to claim 2 wood fibre board is characterized in that: described precompressed, and the control temperature is an indoor temperature, and the precompressed mode is a continuous rolling, and the average line pressure of precompressed is 800～1200N/cm.
7. the production method of surface infiltration according to claim 2 wood fibre board is characterized in that: described hot-forming, the control temperature is 190～230 ℃, and pressure is 3.5～6.5MPa, and the time is 30～50s/mm.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102350721A (en) * | 2011-09-28 | 2012-02-15 | 浙江农林大学 | Method for preparing fiber particle board |
| CN102601840A (en) * | 2012-03-31 | 2012-07-25 | 灵山县科学技术开发中心 | Production method for artificial board made of fast-growing eucalyptus and cane trash |
| CN103433994A (en) * | 2013-08-15 | 2013-12-11 | 长白山保护开发区绿源环保科技有限公司 | Technology for utilizing abandoned agaric bags to make plates through hot pressing |
| CN104760112A (en) * | 2015-01-30 | 2015-07-08 | 北京华露科技有限公司 | Method for preparing medium/high-density fiber board by sunflower stems |
| CN107443533A (en) * | 2016-06-01 | 2017-12-08 | 鲁玺 | The manufacture method of environmentally friendly dry method Thermo-bonding fibres plate |
| CN109624015A (en) * | 2018-12-29 | 2019-04-16 | 上海昶法新材料有限公司 | A kind of environment-friendly type density board and preparation method thereof of papermaking waste production |
| CN112589948A (en) * | 2020-11-13 | 2021-04-02 | 江苏逸创新能源科技发展有限公司 | Processing technology of carbon fiber plate |
| CN113279289A (en) * | 2021-07-23 | 2021-08-20 | 南通跃香拉链有限公司 | Half-dry type airflow forming preparation process of fiberboard |
| CN113601661A (en) * | 2021-07-02 | 2021-11-05 | 福建省永安林业(集团)股份有限公司 | Manufacturing method of high-density and high-strength plant fiber board |
| CN113771173A (en) * | 2021-09-15 | 2021-12-10 | 内蒙古工业大学 | Preparation method of completely degradable coating fiberboard based on soybean straws |
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| CN101450503A (en) * | 2008-12-31 | 2009-06-10 | 郑林义 | Wood-bamboo straw fiberboard and composite board and post wet-method production technique |
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| CN101450503A (en) * | 2008-12-31 | 2009-06-10 | 郑林义 | Wood-bamboo straw fiberboard and composite board and post wet-method production technique |
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| CN102350721A (en) * | 2011-09-28 | 2012-02-15 | 浙江农林大学 | Method for preparing fiber particle board |
| CN102350721B (en) * | 2011-09-28 | 2014-07-16 | 浙江农林大学 | Method for preparing fiber particle board |
| CN102601840A (en) * | 2012-03-31 | 2012-07-25 | 灵山县科学技术开发中心 | Production method for artificial board made of fast-growing eucalyptus and cane trash |
| CN103433994A (en) * | 2013-08-15 | 2013-12-11 | 长白山保护开发区绿源环保科技有限公司 | Technology for utilizing abandoned agaric bags to make plates through hot pressing |
| CN104760112A (en) * | 2015-01-30 | 2015-07-08 | 北京华露科技有限公司 | Method for preparing medium/high-density fiber board by sunflower stems |
| CN107443533A (en) * | 2016-06-01 | 2017-12-08 | 鲁玺 | The manufacture method of environmentally friendly dry method Thermo-bonding fibres plate |
| CN109624015A (en) * | 2018-12-29 | 2019-04-16 | 上海昶法新材料有限公司 | A kind of environment-friendly type density board and preparation method thereof of papermaking waste production |
| CN112589948A (en) * | 2020-11-13 | 2021-04-02 | 江苏逸创新能源科技发展有限公司 | Processing technology of carbon fiber plate |
| CN113601661A (en) * | 2021-07-02 | 2021-11-05 | 福建省永安林业(集团)股份有限公司 | Manufacturing method of high-density and high-strength plant fiber board |
| CN113601661B (en) * | 2021-07-02 | 2022-06-21 | 福建省永安林业(集团)股份有限公司 | Manufacturing method of high-density and high-strength plant fiber board |
| CN113279289A (en) * | 2021-07-23 | 2021-08-20 | 南通跃香拉链有限公司 | Half-dry type airflow forming preparation process of fiberboard |
| CN113279289B (en) * | 2021-07-23 | 2021-09-28 | 南通跃香拉链有限公司 | Half-dry type airflow forming preparation process of fiberboard |
| CN113771173A (en) * | 2021-09-15 | 2021-12-10 | 内蒙古工业大学 | Preparation method of completely degradable coating fiberboard based on soybean straws |
| CN113771173B (en) * | 2021-09-15 | 2023-09-08 | 内蒙古工业大学 | Preparation method of completely degradable coating fiberboard based on soybean straw |
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Application publication date: 20110907 |