CN105643760A - Production method of environment-friendly mildew-proof medium density fiberboard - Google Patents
Production method of environment-friendly mildew-proof medium density fiberboard Download PDFInfo
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- CN105643760A CN105643760A CN201511026975.2A CN201511026975A CN105643760A CN 105643760 A CN105643760 A CN 105643760A CN 201511026975 A CN201511026975 A CN 201511026975A CN 105643760 A CN105643760 A CN 105643760A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/04—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/02—Processes; Apparatus
- B27K3/0207—Pretreatment of wood before impregnation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/0085—Thermal treatments, i.e. involving chemical modification of wood at temperatures well over 100°C
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N1/00—Pretreatment of moulding material
- B27N1/003—Pretreatment of moulding material for reducing formaldehyde gas emission
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/002—Manufacture of substantially flat articles, e.g. boards, from particles or fibres characterised by the type of binder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/10—Moulding of mats
- B27N3/12—Moulding of mats from fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K2240/00—Purpose of the treatment
- B27K2240/20—Removing fungi, molds or insects
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The invention relates to a production method of an environment-friendly mildew-proof medium density fiberboard. The production method comprises the following steps: raw material chipping; wood chip washing with water; wood chip softening by cooking; wax application: using paraffin with the amount of being 0.8-1.0% of the weight of a semi-finished fiberboard; wood chip decomposition by defibrator process; adhesive application: applying a grade E1 urea-formaldehyde resin adhesive to a fiber outlet of a defibrator with the amount of 180-205kg/m<3>; applying a curing agent with the amount of 15-20kg/m<3> and a mildew preventive with the amount of 5.0-6.0kg/m<3>; drying, thereby controlling the moisture content of the fibers to the range of 8-11%; separation; spreading forming; prepressing; hot pressing; board reversing for cooling; sanding; and saw cutting, thereby obtaining the medium density fiberboard finished product. The environment-friendly mildew-proof fiberboard produced by use of the production method has the formaldehyde emission reaching grade E1 specified by GB18580-2001; the board is high in dimensional stability, and can be prevented from buckling deformation; the antibacterial ratio of the board is 90% or above, and the mildew-proof grade of the board reaches grade 1.
Description
Technical field
The present invention relates to the technical field of producing of fiberboard, specifically the production method of a kind of environment friendly mildew resistant medium density fibre board (MDF).
Background technology
At present, along with the fast development of China's economy, the rapid raising of living standards of the people, fiberboard applies to the industries such as Furniture manufacture, interior decoration, kitchen cabinet, timber more and more widely, wherein, furniture manufacturing industry and interior decoration industry account for more than 90%, and fiberboard has huge market at furniture manufacturing industry and decorative craft. when medium density fibre board (MDF) is for the manufacture of purposes such as integral cabinet, toilet furniture, partition of toilet, bath cabinets, it is in dampness and the indoor environment of high humidity state, not only require that the furniture of fiberboard manufacture has minimum burst size of methanal, namely the E1 level that burst size of methanal is up to state standards, does not cause harm to HUMAN HEALTH, and require that these interior decoration things and furniture can keep good fungicidal properties in the occasion (bathroom, toilet, kitchen) that plum rain season and atmospheric moisture are big, growth can not be bred fast due to mould after fiberboard makes moist, cause decorations thing and furniture surface is stained, mechanical strength decline, send peculiar smell, pollute room air, human body Long contact time mould is detrimental to health. and the chemical composition of fiber board wood raw material is Mierocrystalline cellulose, hemicellulose, lignin, chemical composition hemicellulose wherein is easy to be hydrolyzed to oligose in the pressure boiling of fiberboard manufacture and the technical process of fiber separation, monose, the polysaccharose substances such as polyxylose are attached to fibreboard surface, fiberboard is caused to be easy to growth aspergillus at plum rain season, mould, Mucor and produce to go mouldy, particularly environment protection pressed-fibre board burst size of methanal is extremely low, can not effectively grow by mould fungus inhibition, it is easier to go mouldy, it is difficult to meet under southern china subtropical climate hot and humid environment to the requirement of interior decoration and furniture health, bigger financial loss is often caused after going mouldy, therefore environment protection pressed-fibre board mildew-resistant is the hot issue that fiberboard industry is badly in need of solving.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of medium density fiber board production technology meeting environmental protection and mildew-resistant requirement.
The present invention solves the problems of the technologies described above the technical scheme adopted: the production method of a kind of environment friendly mildew resistant medium density fibre board (MDF), comprises the following steps:
(1) raw material is chipped;
(2) wood chip washing: it is clean in the water of 40-60 DEG C that the wood chip cut adds temperature, and removal of contamination, balances wood chip water ratio;
(3) chip steaming softens: sheet-shaped material adds pressure is 0.85-0.95MPa, temperature is that the steam buffer feed bin of 160-180 DEG C carries out boiling and softens, and cooking time is 3.5-4.5min;
(4) wax is executed: paraffin consumption is the 0.8-1.0% of work in-process fiberboard weight;
(5) wood chip defibrator process is decomposed;
(6) applying glue: apply E at defibrator fiber outlet place1Grade urea-formaldehyde resin tackiness agent, E1The consumption of grade urea-formaldehyde resin tackiness agent is 180-205kg/m3;
(7) solidifying agent and mould inhibitor is executed: the applied amount of solidifying agent is 15-20kg/m3, the consumption of mould inhibitor is 5.0-6.0kg/m3;
(8) fiber drying: dry inlet temperature is controlled to 120-150 DEG C, and temperature out is controlled to 52-65 DEG C, makes fiber moisture control between 8-11%;
(9) fiber sorting;
(10) mat formation shaping;
(11) precompressed: after preformer precompressed, make slab thickness be production board thickness 6-10 doubly;
(12) hot pressing: slab is carried out hot pressing, hot pressing temperature is 160-218 DEG C, and hot pressing time is 18-45S, and hot pressing high pressure area pressure is 3.5-4.5MPa, and low pressure area pressure is 0.5-0.75MPa;
(13) plate cooling is turned over;
(14) sanding;
(15) medium density fiber board finished product is made in sawing.
In described step (7), solidifying agent is the mixing solutions of ammonium chloride and trolamine; Mould inhibitor is that derosal, bromine bacterium are clear, one or more solution being mixed in the iodo-2-propyl group-butylamino methyl-formiate of Salicylanlide, BIT, benzene thiophene cyanogen, Timbercote 2000,3-or copper 8-quinolinolate.
The environment friendly mildew resistant fiberboard tool that the production technique of the present invention is produced has the following advantages:
1. burst size of methanal reaches the E1 level that GB18580-2001 specifies, board dimension stability height, sheet material can not buckling deformation, meet the purposes such as automotive trim panel, bathroom suite manufacture.
2. adopting the medium density fibre board (MDF) that the inventive method is produced, fiberboard antibacterial and mouldproof effect reaches the requirement of JC/T2039-2010 " antibacterial and mouldproof Wooden decoration board ", and its antibiotic rate reaches more than 90%, and anti-mould grade reaches 1 grade.
Embodiment
The technical scheme of the present invention and useful effect are described further below in conjunction with embodiment.
Embodiment 1: produce 2.5mm mildew-resistant fiberboard
(1) choosing the place depositing raw material, the raw aqueous rate chosen controls at 40-50%, and wood material carries out classification storage respectively, and raw materials used seeds proportioning is eucalyptus wood (75%)+weedtree (25%).
(2) being chipped with chipper by various wood material (such as eucalyptus brush wood, path wood, wood machining residues etc.), wood chip requires that otch is smooth, and size is even, is of a size of: long 16-30mm, wide 15-25mm, thick 3-5mm. Purchased wood chip, carries out quality test by above chip quality and raw aqueous rate requirement.
(3) the assorted sheet of eucalyptus is stored in two different feed bins respectively, by regulating the rotational frequency of wood chip conveyor screw to realize the ratio requirement of raw material, is provided with strong electromagnet, can remove the various ferrous metal materials being mixed with in wood chip in conveying wood chip process.
(4) by vibratory screening apparatus, sheet wood chip is screened, excessive wood chip and excessively little chip are removed.
(5) accepted chips after screening is sent into water wash system through rotary conveyor and is washed, and water temperature is controlled to 40-60 DEG C, is removed in wood chip the silt, rubble and the metallics that contain by washing, the water ratio in balance wood chip.
(6) by the wood chip after washing, to be delivered to vapor pressure be 0.85MPa, and temperature is carry out boiling in the boiling cylinder of 160 DEG C to soften, and cooking time is 3.5 minutes.
(7) wood chip after boiling is softening adds paraffin water repellent, by, in the feed auger directly adding defibrator after its melting, paraffin consumption is the 1.0% of work in-process fiberboard weight; Wood chip carries out machinery decomposition through defibrator, makes fiber.
(8) 2.5mmE is prepared1Grade urea-formaldehyde resin tackiness agent, preparation curing agent solution, preparation mould inhibitor solution.
(9) E is applied at defibrator fiber outlet pipeline place1Grade urea-formaldehyde resin tackiness agent, E1The consumption of grade urea-formaldehyde resin is 180kg/m3, adding solidifying agent and mould inhibitor at fiber outlet transport pipe simultaneously, hardener formula is ammonium chloride and the trolamine aqueous solution mainly, and concentration is 20%, and addition is about 15kg/m3; Mould inhibitor solution is by least one in derosal, Salicylanlide, BIT, benzene thiophene cyanogen, Timbercote 2000,3-iodo-2-propyl group-butylamino methyl-formiate or copper 8-quinolinolate or the multiple solution being mixed. Mould inhibitor adds separately at fiber outlet pipeline place, and addition is 5.0kg/m3��
(10) by applying glue, execute solidifying agent, fiber after mould inhibitor send into drying tube and be dried process, make fiber moisture control between 10-11%; Dried fiber, carries out sorting by aidr bells blast system, removes stalk shape fiber and robust fibre.
(11) with machinery suction type spreading machine, fiber lay down being dressed up type, through preformer precompressed, the maximum pressure of preformer is 115bar, and after precompressed, slab thickness is 10 times of production board thickness.
(12) slab being carried out hot pressing, each regional temperature of hot pressing is controlled to 180 DEG C, 215 DEG C, 210 DEG C, 205 DEG C, 160 DEG C, and control pressure top pressure is 4.5MPa, and middle minimum pressure is 0.75MPa, and hot pressing time is the 18-29 second.
(13) after hot pressing, by the hair plates of diagonal saw by raw for hair plates band sawing four production board sizes, the 2.5mm medium density fiber boards half-finished product made, through turning over plate cooling, stacking, work in-process storehouse store 24 hours, check and meet E1After level national standard, the raw production board of sawing, coding print. The product that detection is defective, separates stacking, individual curing in time.
(14) finished product stock management. Treating that warehouse-in product are protected inspector and production board is carried out visual testing, packaging and warehousing of grading stores.
Medium density fibre board (MDF) in stockyard being carried out stochastic sampling, checks according to GB18580-2001, GB/T11718-2009, JC/T2039-2010, result is such as following table:
Embodiment 2: produce 3.0mm mildew-resistant fiberboard
(1) choosing the place depositing raw material, the raw aqueous rate chosen controls at 40-50%, and wood material carries out classification storage respectively, and raw materials used seeds proportioning is eucalyptus wood (50%)+weedtree (50%).
(2) being chipped with chipper by various wood material (such as eucalyptus brush wood, path wood, wood machining residues etc.), wood chip requires that otch is smooth, and size is even, is of a size of: long 16-30mm, wide 15-25mm, thick 3-5mm. Purchased wood chip, carries out quality test by above chip quality and raw aqueous rate requirement.
(3) the assorted sheet of eucalyptus is stored in two different feed bins respectively, by regulating the rotational frequency of wood chip conveyor screw to realize the ratio requirement of raw material, is provided with strong electromagnet, can remove the various ferrous metal materials being mixed with in wood chip in conveying wood chip process.
(4) by vibratory screening apparatus, sheet wood chip is screened, excessive wood chip and excessively little chip are removed.
(5) accepted chips after screening is sent into water wash system through rotary conveyor and is washed, and water temperature is controlled to 40-60 DEG C, is removed in wood chip the silt contained by washing, rubble and metallics, the water ratio in balance wood chip.
(6) by the wood chip after washing, to be delivered to vapor pressure be 0.88MPa, and temperature is carry out boiling in the boiling cylinder of 170 DEG C to soften, and cooking time is 4.0 minutes.
(7) wood chip after boiling is softening adds paraffin water repellent, by, in the feed auger directly adding defibrator after its melting, paraffin consumption is the 0.90% of work in-process fiberboard weight; Wood chip carries out machinery decomposition through defibrator, makes fiber.
(8) E is prepared1Grade urea-formaldehyde resin tackiness agent:, preparation curing agent solution, preparation mould inhibitor solution.
(9) E is applied at defibrator fiber outlet pipeline place1Grade urea-formaldehyde resin tackiness agent, E1The consumption of grade urea-formaldehyde resin is 190kg/m3, adding solidifying agent and mould inhibitor at fiber outlet transport pipe simultaneously, hardener formula is ammonium chloride and the trolamine aqueous solution mainly, and concentration is 20%, and addition is about 18kg/m3; Mould inhibitor is at least one in, Salicylanlide, benzene thiophene cyanogen, Timbercote 2000 clear by derosal, bromine bacterium or copper 8-quinolinolate or the multiple solution being mixed. Mould inhibitor also adds separately at fiber outlet pipeline place, and addition is 5.5kg/m3��
(10) by applying glue, execute solidifying agent, fiber after mould inhibitor send into drying tube and be dried process, make fiber moisture control between 9.0-10.0%; Dried fiber, carries out sorting by aidr bells blast system, removes stalk shape fiber and robust fibre.
(11) with machinery suction type spreading machine, fiber lay down being dressed up type, through preformer precompressed, the maximum pressure of preformer is 115bar, and after precompressed, slab thickness is 8 times of production board thickness.
(12) slab being carried out hot pressing, each regional temperature of hot pressing is controlled to 185 DEG C, 218 DEG C, 215 DEG C, 212 DEG C, 185 DEG C, and control pressure top pressure is 4.0Mpa, and middle minimum pressure is 0.65Mpa, and hot pressing time is the 20-29 second.
(13) after hot pressing, by the hair plates of diagonal saw by raw for hair plates band sawing four production board sizes, the 3.0mm medium density fiber boards half-finished product made, through turning over plate cooling, stacking, work in-process storehouse store 36 hours, check and meet E1After level national standard, the raw production board of sanding sawing, coding print. The product that detection is defective, separates stacking, individual curing in time.
(14) finished product stock management. Treating that warehouse-in product are protected inspector and production board is carried out visual testing, packaging and warehousing of grading stores.
Medium density fibre board (MDF) in stockyard being carried out stochastic sampling, checks according to GB18580-2001, GB/T11718-2009, JC/T2039-2010, result is such as following table:
Embodiment 3: 4.7mm mildew-resistant plate is produced in experiment
(1) choosing the place depositing raw material, the raw aqueous rate chosen controls at 40-50%, and raw materials used seeds are full weedtree.
(2) being chipped with chipper by wood material (such as path wood, wood machining residues etc.), wood chip requires that otch is smooth, and size is even, is of a size of: long 16-30mm, wide 15-25mm, thick 3-5mm. Purchased wood chip, carries out quality test by above chip quality and raw aqueous rate requirement.
(3) by the storing of chips after cutting in chip bin, then by spiral, wood chip is transported on rotary conveyor, rotary conveyor conveying wood chip process is provided with strong electromagnet, the various ferrous metal materials being mixed with in wood chip can be removed.
(4) by vibratory screening apparatus, sheet wood chip is screened, excessive wood chip and excessively little chip are removed.
(5) accepted chips after screening is sent into water wash system through rotary conveyor and is washed, and water temperature is controlled to 40-60 DEG C, is removed in wood chip the silt contained by washing, rubble and metallics, the water ratio in balance wood chip.
(6) by the wood chip after washing, to be delivered to vapor pressure be 0.95Mpa, and temperature is carry out boiling in the boiling cylinder of 180 DEG C to soften, and cooking time is 4.5 minutes.
(7) wood chip after boiling is softening adds paraffin water repellent, by, in the feed auger directly adding defibrator after its melting, paraffin consumption is the 0.80% of work in-process fiberboard weight; Wood chip carries out machinery decomposition through defibrator, makes fiber.
(8) E is prepared1Grade urea-formaldehyde resin tackiness agent:, preparation curing agent solution, preparation mould inhibitor solution.
(9) E is applied at defibrator fiber outlet pipeline place1Grade urea-formaldehyde resin tackiness agent, E1The consumption of grade urea-formaldehyde resin is 205kg/m3, adding solidifying agent and mould inhibitor at fiber outlet transport pipe simultaneously, hardener formula is ammonium chloride and the trolamine aqueous solution mainly, and concentration is 20%, and addition is about 20kg/m3; Mould inhibitor is at least one in, Salicylanlide, benzene thiophene cyanogen, Timbercote 2000,3-iodo-2-propyl group-butylamino methyl-formiate clear by derosal, bromine bacterium or copper 8-quinolinolate or the multiple solution being mixed. Mould inhibitor adds separately at fiber outlet pipeline place, and addition is 6.0kg/m3��
(10) by applying glue, execute solidifying agent, fiber after mould inhibitor send into drying tube and be dried process, make fiber moisture control between 8.0-9.0%; Dried fiber, carries out sorting by aidr bells blast system, removes stalk shape fiber and robust fibre.
(11) with machinery suction type spreading machine, fiber lay down being dressed up type, through preformer precompressed, the maximum pressure of preformer is 115bar, and after precompressed, slab thickness is 6 times of production board thickness.
(12) slab being carried out hot pressing, each regional temperature of hot pressing is controlled to 185 DEG C, 218 DEG C, 218 DEG C, 218 DEG C, 190 DEG C, and control pressure top pressure is 3.5Mpa, and middle minimum pressure is 0.5Mpa, and hot pressing time is the 30-42 second.
(13) after hot pressing, by the hair plates of diagonal saw by raw for hair plates band sawing four production board sizes, the 4.7mm medium density fiber boards half-finished product made, through turning over plate cooling, stacking, work in-process storehouse store 48 hours, check and meet E1After level national standard, the raw production board of sanding sawing, coding print. The product that detection is defective, separates stacking, individual curing in time.
(14) finished product stock management. Treating that warehouse-in product are protected inspector and production board is carried out visual testing, packaging and warehousing of grading stores.
Medium density fibre board (MDF) in stockyard being carried out stochastic sampling, checks according to GB18580-2001, GB/T11718-2009, JC/T2039-2010, result is such as following table:
Claims (2)
1. the production method of an environment friendly mildew resistant medium density fibre board (MDF), it is characterised in that, comprise the following steps:
(1) raw material is chipped;
(2) wood chip washing: it is clean in the water of 40-60 DEG C that the wood chip cut adds temperature, and removal of contamination, balances wood chip water ratio;
(3) chip steaming softens: sheet-shaped material adds pressure is 0.85-0.95MPa, temperature is that the steam buffer feed bin of 160-180 DEG C carries out boiling and softens, and cooking time is 3.5-4.5min;
(4) wax is executed: paraffin consumption is the 0.8-1.0% of work in-process fiberboard weight;
(5) wood chip defibrator process is decomposed;
(6) applying glue: apply E at defibrator fiber outlet place1Grade urea-formaldehyde resin tackiness agent, E1The consumption of grade urea-formaldehyde resin tackiness agent is 180-205kg/m3;
(7) solidifying agent and mould inhibitor is executed: the applied amount of solidifying agent is 15-20kg/m3, the consumption of mould inhibitor is 5.0-6.0kg/m3;
(8) fiber drying: dry inlet temperature is controlled to 120-150 DEG C, and temperature out is controlled to 52-65 DEG C, makes fiber moisture control between 8-11%;
(9) fiber sorting;
(10) mat formation shaping;
(11) precompressed: after preformer precompressed, make slab thickness be production board thickness 6-10 doubly;
(12) hot pressing: slab is carried out hot pressing, hot pressing temperature is 160-218 DEG C, and hot pressing time is 18-45S, and hot pressing high pressure area pressure is 3.5-4.5MPa, and low pressure area pressure is 0.5-0.75MPa;
(13) plate cooling is turned over;
(14) sanding;
(15) medium density fiber board finished product is made in sawing.
2. the production method of environment friendly mildew resistant medium density fibre board (MDF) according to claim 1, it is characterised in that, in described step (7), solidifying agent is the mixing solutions of ammonium chloride and trolamine; Mould inhibitor is at least one in, Salicylanlide, BIT, benzene thiophene cyanogen, Timbercote 2000,3-iodo-2-propyl group-butylamino methyl-formiate clear by derosal, bromine bacterium or copper 8-quinolinolate or the multiple solution being mixed.
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| CN109016059A (en) * | 2018-08-17 | 2018-12-18 | 阜阳大可新材料股份有限公司 | A kind of preparation method of ultra-thin ultra-low formaldehyde burst size fiberboard |
| CN109206930A (en) * | 2017-07-04 | 2019-01-15 | 上海前引科技有限公司 | A kind of antimildew and antibacterial anion medium density fibre board (MDF), preparation method |
| CN110978200A (en) * | 2019-12-19 | 2020-04-10 | 南宁科天水性科技有限责任公司 | Composite block board and manufacturing method thereof |
| CN111906885A (en) * | 2020-08-10 | 2020-11-10 | 济南采明实业有限公司 | Ultrahigh-density anti-bending and anti-doubling plate and production method thereof |
| CN112342807A (en) * | 2020-11-20 | 2021-02-09 | 江苏健坤木业有限公司 | Method for preparing fiberboard |
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| CN108687902A (en) * | 2017-04-10 | 2018-10-23 | 大亚人造板集团有限公司 | A kind of anti-corrosive antibacterial medium density fibre board (MDF) and its manufacturing process |
| CN109206930A (en) * | 2017-07-04 | 2019-01-15 | 上海前引科技有限公司 | A kind of antimildew and antibacterial anion medium density fibre board (MDF), preparation method |
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| CN111906885A (en) * | 2020-08-10 | 2020-11-10 | 济南采明实业有限公司 | Ultrahigh-density anti-bending and anti-doubling plate and production method thereof |
| CN112342807A (en) * | 2020-11-20 | 2021-02-09 | 江苏健坤木业有限公司 | Method for preparing fiberboard |
| CN112976218A (en) * | 2021-02-27 | 2021-06-18 | 田宁刚 | Manufacturing method of medium density fiberboard |
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