CN102806591A - Manufacturing process for ultra light fiber board - Google Patents
Manufacturing process for ultra light fiber board Download PDFInfo
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- CN102806591A CN102806591A CN2012102625821A CN201210262582A CN102806591A CN 102806591 A CN102806591 A CN 102806591A CN 2012102625821 A CN2012102625821 A CN 2012102625821A CN 201210262582 A CN201210262582 A CN 201210262582A CN 102806591 A CN102806591 A CN 102806591A
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- melamine
- urea
- boiling
- adhesive
- manufacturing process
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 239000011094 fiberboard Substances 0.000 title claims abstract description 20
- 229920000877 Melamine resin Polymers 0.000 claims abstract description 46
- 239000000853 adhesive Substances 0.000 claims abstract description 24
- 230000001070 adhesive effect Effects 0.000 claims abstract description 24
- 239000002023 wood Substances 0.000 claims abstract description 23
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 18
- 229920001807 Urea-formaldehyde Polymers 0.000 claims abstract description 16
- 238000009835 boiling Methods 0.000 claims abstract description 16
- -1 melamine modified urea Chemical class 0.000 claims abstract description 16
- 239000000835 fiber Substances 0.000 claims abstract description 15
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 12
- 238000007731 hot pressing Methods 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 12
- 235000019270 ammonium chloride Nutrition 0.000 claims abstract description 9
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 238000005406 washing Methods 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims abstract description 3
- 238000003860 storage Methods 0.000 claims abstract description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 61
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 44
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 31
- 239000004202 carbamide Substances 0.000 claims description 31
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- 229920005989 resin Polymers 0.000 claims description 9
- 239000011347 resin Substances 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 238000000227 grinding Methods 0.000 claims description 8
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- 239000003292 glue Substances 0.000 claims description 7
- 239000012188 paraffin wax Substances 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 230000013011 mating Effects 0.000 claims description 6
- 238000013329 compounding Methods 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 5
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims description 4
- 235000019253 formic acid Nutrition 0.000 claims description 4
- 230000007306 turnover Effects 0.000 claims description 4
- 238000010792 warming Methods 0.000 claims description 4
- 238000012856 packing Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 abstract description 15
- 238000001035 drying Methods 0.000 abstract description 5
- 238000012216 screening Methods 0.000 abstract description 3
- 238000002156 mixing Methods 0.000 abstract 2
- 239000004819 Drying adhesive Substances 0.000 abstract 1
- 238000004806 packaging method and process Methods 0.000 abstract 1
- 239000001993 wax Substances 0.000 abstract 1
- 235000019256 formaldehyde Nutrition 0.000 description 16
- 239000004576 sand Substances 0.000 description 10
- 230000008569 process Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 241000499489 Castor canadensis Species 0.000 description 5
- 235000011779 Menyanthes trifoliata Nutrition 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 4
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 2
- 235000011613 Pinus brutia Nutrition 0.000 description 2
- 241000018646 Pinus brutia Species 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 239000012295 chemical reaction liquid Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000001143 conditioned effect Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- UFMBFIIJKCBBHN-MEKJRKEKSA-N myelin peptide amide-16 Chemical compound C([C@@H](C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](C)C(=O)N[C@@H](CO)C(=O)N[C@@H](C)C(N)=O)NC(=O)[C@H](CCCCN)NC(=O)[C@H](CO)NC(=O)[C@H](CCCNC(N)=N)NC(=O)[C@H](CCC(N)=O)NC(=O)[C@H](CO)NC(=O)[C@H]1N(CCC1)C(=O)[C@H](CCCNC(N)=N)NC(=O)[C@H](CCCCN)NC(=O)[C@H](CCC(N)=O)NC(=O)[C@H](C)NC(=O)[C@H](C)NC(C)=O)C1=CC=C(O)C=C1 UFMBFIIJKCBBHN-MEKJRKEKSA-N 0.000 description 2
- 108010074682 myelin peptide amide-16 Proteins 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229920001817 Agar Polymers 0.000 description 1
- 229920002488 Hemicellulose Polymers 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 235000011609 Pinus massoniana Nutrition 0.000 description 1
- 241000018650 Pinus massoniana Species 0.000 description 1
- 241000219000 Populus Species 0.000 description 1
- 229920002522 Wood fibre Polymers 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000008272 agar Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
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- 229920002678 cellulose Polymers 0.000 description 1
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- 238000009792 diffusion process Methods 0.000 description 1
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- 238000002513 implantation Methods 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000008247 solid mixture Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000002916 wood waste Substances 0.000 description 1
Landscapes
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The invention discloses a manufacturing process for an ultra light fiber board. The method comprises the following steps of: peeling wood, cutting to obtain sheets, screening, washing, boiling, separating fibers, mixing and applying adhesive, drying and sorting, paving and forming, prepressing, performing hot-pressing, turning the board and cooling, sanding, inspecting and classifying, and packaging and putting in storage, wherein in the boiling step, the boiling material level is 1.6 to 3m, and the boiling temperature is 165 to 175 DEG C; in the step of separating the fibers, the wood sheets enter a mill through a ribbon spiral conveyor, molten waxes are fed into the mill simultaneously, the application amount is 5.0 to 7.0kg/m<3>, and the gap of an abrasive wheel is 0 to 4mm; and in the step of mixing and applying the adhesive, melamine modified urea resin adhesive is applied, the adhesive application amount is 195 to 210kg/m<3>, the adding amount of a curing agent is 1 to 2.5 percent based on the mass of absolute drying adhesive, and the curing agent is a mixture of ammonium chloride and a (commercially available) HA101 cross-linking agent in a mass ratio of 3:1. Moreover, a method for preparing the melamine modified urea resin adhesive used by manufacturing the ultra light fiber board is correspondingly provided for matching the manufacturing process.
Description
Technical field
The invention belongs to beaver board and make field, particularly a kind of manufacturing process of ultralight matter fiberboard.
Background technology
China's medium density fibre board (MDF) (MDF) industry is since early eighties development in last century, because of moderate (0.7 ~ 0.8 g/cm of its density
3), superior performance is widely used in stereo set, indoor and outdoor decoration etc., in wood-based panel industry, occupies critical role.Medium density fibre board (MDF) is since invention; Quality, good machining property are widely used in fields such as furniture, indoor decorating, building, packing, musical instrument, vehicle and shipbuilding uniformly so that it is fine and close; Along with the continuous development of density board production equipment and production technology, its scope of application also more and more widely.With density fiber board carry out two-sided facing and around substitute stainless steel behind the edge sealing or plastics not only reduce its production cost greatly, increase the service life, manufacture process is simple simultaneously, reusable edible is to economizing on resources and protecting environment that positive meaning is arranged.The production of medium density fibre board (MDF) (MDF) is raw material with the wood fibre usually, in south, is primary raw material with the masson pine, and a certain amount of weedtree of arranging in pairs or groups is produced.China's Forest Resources is poor at present, and society is to the raising of timber demand in addition, and timber and woodwork disparities between supply and demand are outstanding day by day.Be timber and the woodwork imbalance between supply and demand of alleviating long-term puzzlement national economy, country extensive construction fast growing Timber stands, meanwhile, the required wood material of wood-based panel industry also turns to artificial fast-growing woods and intermediate cutting path woods by industrial wood waste gradually.Show that according to interrelated data domestic part wood-based plate manufacturing enterprise begins to utilize fast-growing woods such as fast growth poplar as the main material production wood-based plate, wherein also comprises being used to make medium density fibre board (MDF).Got into since the nineties, medium density fibre board (MDF) (MDF) commercial production makes significant progress, and the development of new technology, new technology has also promoted the development and application of MDF new product; Particularly in recent years, develop the floor successively, but from integral body with high-density plate and MDF sheet material with functions such as fire-retardant, water-fast, mildew-resistant, at present on the domestic market beaver board (density is at 0.7 g/cm with 70 types
3About) be main, part 80 types are also arranged, and (density is at 0.8 g/cm
3About) and the above high-density plate of 80 types, and 60 types (density is at 0.6 g/cm
3About) and the following low density fiberboard of 60 types still belong to blank.
Low density fiberboard or ultralight matter beaver board (UL-MDF) also are a kind of of beaver board; With the string is raw material; Through chipping, fiber separation, slab moulding (admix resin glue and additive is mated formation); Under hot pressing, a kind of sheet material that the plasticizing of cellulose and hemicellulose and lignin is formed.Because artificial fast-growing woods and the general density of intermediate cutting small dimension wood are on the low side, in order to make the density that fiberboard can reduce sheet material.For artificial fast-growing woods of rational exploitation and utilization and intermediate cutting small dimension wood, be necessary ultralight matter beaver board is studied.But artificial fast-growing woods of the present invention's rational exploitation and utilization and intermediate cutting small dimension wood, reduced MDF cost, (density is at 0.6 g/cm to fill up domestic market 60 types
3About) blank of following low density fiberboard, expanded the application of density fiber board, also solved environmental pollution and resource circulation is utilized problem.
Summary of the invention
The object of the present invention is to provide a kind of manufacturing process of ultralight matter fiberboard, in addition, for cooperating this manufacturing process, the also corresponding manufacturing approach of making the employed cyanurotriamide modified urea resin glue of this ultralight matter fiberboard that provides.
Technical scheme: a kind of manufacturing process of ultralight matter fiberboard; Comprise the steps: the timber peeling, chip, screen, washing, boiling, fiber separation, glue compounding and applying, dried, classified, the moulding of mating formation, precompressed, hot pressing, turnover panel cooling, sanding, check grade, packing is put in storage
In the said boiling step, boiling material level 1.6 ~ 3m, boiling temperature 165-175 ℃;
In the said fiber separation step, wood chip gets into grinding machine through the belt spiral, in grinding machine, adds melt paraffin simultaneously, paraffin applied amount 5.0 ~ 7.0kg/m
3, abrasive disk space is in 0 ~ 4mm scope;
In the said glue compounding and applying step, on the pipeline of fiber ejection, apply the cyanurotriamide modified urea resin adhesive, resin added is 195 ~ 210kg/m
3, the curing agent addition is 1 ~ 2.5% (with respect to the mass percent of over dry adhesive).
The over dry adhesive be meant with adhesive in baking oven under 120 ℃ with water evaporates, residual solid mixture.
Described curing agent is the mixture of ammonium chloride and HA101 crosslinking agent, ammonium chloride: the HA101 crosslinking agent is 3:1 (mass percent).
The HA101 crosslinking agent is the commercially available prod of EverFirst Wisefund (Beijing) Technology Co., Ltd., and outward appearance is colourless or weak yellow liquid; PH value: 8～9; Density: about 1.1 g/ml.
Preferably, in the said heat-press step, controlled well and pressed off sum velocity; Hot pressing temperature is arranged on 220-160 ℃, rises and presses section 0 framework distance at 20-60mm, adopts five sections humidity provinces; Hot pressing pressure is at 0-4MPa, hot pressing factor 6-7.0s/mm, maximum pressure 1.3-1.8MPa.
The preparation method of the cyanurotriamide modified urea resin adhesive that applies in the said glue compounding and applying step is following:
(1), adds and to account for the cyanurotriamide modified urea resin adhesive quality than being that 55% formaldehyde is in agitated reactor, with mass concentration 40% sodium hydroxide solution accent pH to 8.8-9.2;
(2), drop into melamine and urea, be warming up to 88-90 ℃ gradually, reaction 20min;
(3), the mol ratio of control formaldehyde and urea is at 1.9-2.2, at 85-90 ℃ of reaction 80-100min down, the formic acid accent pH to 5.0-6.0 with mass percent concentration 20% reacts to viscosity 18-19s;
(4), add urea and melamine, the mol ratio of formaldehyde and urea and melamine sum is reacted 25-35min at 1.30-1.45 at 78-88 ℃;
(5), add urea, the mol ratio that makes formaldehyde and urea and melamine sum is incubated 20-30min at 0.8-0.95 at 70-80 ℃, is cooled to 40 ℃ gradually, uses the sodium hydroxide solution adjust pH of mass concentration 40% to be 7.8-8.2;
In the above-mentioned steps, the total amount of melamine accounts for the 1.0-2.5% of whole liquid resin quality, and the mol ratio of formaldehyde and urea and melamine sum is at 0.8-0.95; Urea drops in three batches, and melamine divides two batches of inputs, and first melamine accounts for the 65-70% of melamine total amount, and second batch of melamine accounts for the 30-35% of melamine total amount;
(6), inject holding vessel, for use.
The viscosity of adhesive adopts GB to be coated with 4 agar diffusion methods and detects: will be coated with 4 glasss position adjustment level earlier, with left index finger by the outlet of staying, again toward glass in implantation temperature be 25 ℃ cyanurotriamide modified urea resin adhesive; The liquid of high cup mouth is struck off with glass bar, when unclamping left index finger, the stopwatch of the right hand is pressed timing; When the cyanurotriamide modified urea resin adhesive from being coated with 4 glasss when having flowed; Press stopwatch again, the reading of record stopwatch repeats twice; Get its mean value, this numerical value is exactly the viscosity of adhesive.
Beneficial effect: this method is produced the extremely-low density fiberboard, and manufacturing approach is simple, easy to operate, and is with low cost.In use do not receive the variation of surrounding environment and change in size, bending, aging etc. take place; The application of density fiber board has been expanded in this invention in addition; Solved environmental pollution simultaneously and resource circulation is utilized problem; Compare with common density board, the ultralight matter density fiber board that this method production obtains has following advantage: 1, the wood raw material unit consumption reduces 0.2t/m3; 2, improve the comprehensive utilization ratio and the added value of timber resources, widen the MDF raw material sources; 3, enlarge the range of application of MDF, satisfy people's demand, alleviate the disparities between supply and demand of timber and woodwork.
The specific embodiment
Below in conjunction with the specific embodiment the present invention is further specified, do not exceeding under the spirit and scope of the present invention, can make more prescription adjustment the present invention.
Embodiment 1
1, cyanurotriamide modified urea resin adhesive preparation
The preparation process is following:
(1), adds and to account for the cyanurotriamide modified urea resin adhesive quality than being that 55% formaldehyde is in agitated reactor, with mass percent concentration 40% sodium hydroxide solution accent pH to 8.8-9.2;
(2), drop into first melamine and first urea, be warming up to 88-90 ℃ gradually, the reaction 20min.
(3), the mol ratio of control formaldehyde and urea is at 1.9-2.2, at 85-90 ℃ of reaction 80min down, the formic acid accent pH to 5.0-6.0 with mass percent concentration 20% reacts to viscosity 18-19s;
(4), add second batch of urea and second batch of melamine, the mol ratio of formaldehyde and urea and melamine sum is 1.30-1.45, reacts 25-35min at 78-88 ℃ time;
(5), add the 3rd batch of urea, make the mol ratio of formaldehyde and urea and melamine sum at 0.8-0.95, be incubated 20-30min at 70-80 ℃,, be cooled to 40 ℃ gradually, use the sodium hydroxide solution conditioned reaction liquid pH value of mass concentration 40% to be 7.8-8.2;
The amount of melamine accounts for 1.0% of whole liquid weight resin, and the mol ratio of formaldehyde and urea and melamine summation is at 0.8-0.95; Urea divides 3 batches of inputs, and melamine divides 2 batches of inputs, and first melamine accounts for the 65-70% of melamine total amount, and second batch of melamine accounts for the 30-35% of melamine total amount.
2, mask-making technology process: after adhesive completes, by the making principle and the technological process of common medium-density plate material, with the timber of different proportion (pine: after the peeling of weedtree=9:1); Be whittled into long 15-20mm, 15-20mm, thickly be the wood chip of 3-4mm; Through Screening Treatment, guarantee the wood plate size requirement, again through washing; Remove impurity such as silt, guarantee the cleaning of wood chip; Through the softening wood chip of boiling, the about 165-170 of boiling temperature ℃, material level is at 2.0m; Wood chip gets into grinding machine through the belt spiral, in grinding machine, adds melt paraffin simultaneously, the about 5-7kg/m of paraffin applied amount
3, abrasive disk space is in the 0-4mm scope; On the pipeline of fiber ejection, apply cyanurotriamide modified urea resin, resin added is 195-210kg/m
3Curing agent is the mixture of ammonium chloride and HA101 crosslinking agent, ammonium chloride: the HA101 crosslinking agent is 3:1 (mass percent), and addition is 2.0%; The HA101 crosslinking agent is the commercially available prod of EverFirst Wisefund (Beijing) Technology Co., Ltd., the moulding of after the drying system drying, mating formation; Adjust the density of mating formation, guarantee slab density 520-550kg/m
3Suitably has reduced in the heat pressing process press section 0 framework apart from 10-20mm, reduce a district pressure temperature 2-5 degree, hot pressing temperature is at 220-160 ℃, the press speed controlling is at 400-700mm/s; The sheet material that goes out press sanding after turnover panel cools off modified 36 hours is handled, and the 4 road sanding sand amounts of cutting are distributed as follows: the first road sand amount of cutting accounts for 55-60%, the second road sand amount of cutting and accounts for that 20-25%, the 3rd road sand amount of cutting account for 10-15%, the 4th road sand amount of cutting accounts for 5-10%; Base material sorting warehouse-in after the sanding.
Make ultralight matter E1 sheet material through above step and detect by GB/T 11718-2009 standard-required, the result is following:
| Performance indications | 15mmULE1A ultralight scutum | Ultralight scutum European standard |
| Density kg/m 3 | 550 | 500-550 |
| High density kg/m 3 | 850-920 | >=850 |
| Surface bonding strength MPa | 0.99 | |
| Plate moisture content % | 7.05 | 5-8 |
| Internal bond strength MPa | 0.71 | >=0.45 |
| MOR MPa | 16 | 16 |
| Thickness swelling rate % | 8.37 | ≤13 |
| Burst size of methanal mg/100g | 7.9 | ≤8 |
| Flatness (thickness of slab standard deviation) | 0.012-0.015 |
Embodiment 2
1, cyanurotriamide modified urea resin adhesive preparation
The preparation process is following:
(1), add formaldehyde in agitated reactor, add mass percent concentration 40% sodium hydroxide solution and transfer pH to 8.8-9.2;
(2), drop into first melamine and first urea, be warming up to 88-90 ℃ gradually, the reaction 20min.
(3), mol ratio is controlled at 1.9-2.2,85-90 ℃ of reaction down, adds formic acid and transfers pH to 5.0-6.0, react to viscosity 18-19s;
(4), add second batch of urea and second batch of melamine, the mol ratio of formaldehyde and urea and melamine summation is reacted 25-35min at 1.30-1.45 at 78-88 ℃;
(5), add the 3rd batch of urea, make the mol ratio of formaldehyde and urea and melamine summation at 0.8-0.95, be incubated 20-30min at 70-80 ℃, be cooled to 40 ℃ gradually, hydro-oxidation sodium solution conditioned reaction liquid pH value is 7.8-8.2;
The amount of melamine accounts for 2.5% of whole liquid resin quality, and the mol ratio of formaldehyde and urea and melamine summation is at 0.8-0.95; Urea divides 3 batches of inputs, and melamine divides 2 batches of inputs, and first melamine accounts for the 65-70% of melamine total amount, and second batch of melamine accounts for the 30-35% of melamine total amount.
2, mask-making technology process: after adhesive completes, by the making principle and the technological process of common medium-density plate material, with the timber of different proportion (pine: after the peeling of weedtree=8:2); Be whittled into long 15-20mm, 15-20mm, thickly be the wood chip of 3-4mm; Through Screening Treatment, guarantee the wood plate size requirement, again through washing; Remove impurity such as silt, guarantee the cleaning of wood chip; Through the softening wood chip of boiling, the about 165-170 of boiling temperature ℃, material level is at 2.0m; Wood chip gets into grinding machine through the belt spiral, in grinding machine, adds melt paraffin simultaneously, the about 6kg/m of paraffin applied amount
3, abrasive disk space is at 3mm; On the pipeline of fiber ejection, apply cyanurotriamide modified urea resin, resin added is 200kg/m
3The mixture of ammonium chloride and HA101 crosslinking agent, ammonium chloride: the HA101 crosslinking agent is 3:1 (mass percent), and addition is 1.5%; The HA101 crosslinking agent is the commercially available prod of EverFirst Wisefund (Beijing) Technology Co., Ltd., the moulding of after the drying system drying, mating formation; Adjust the density of mating formation, guarantee slab density 520-540kg/m
3Suitably has reduced in the heat pressing process press section 0 framework apart from 10-20mm, reduce a district pressure temperature 2-5 degree, hot pressing temperature is at 220-160 ℃, the press speed controlling is at 400-700mm/s; The sheet material that goes out press sanding after turnover panel cools off modified 36 hours is handled, and the 4 road sanding sand amounts of cutting are distributed as follows: the first road sand amount of cutting accounts for 55-60%, the second road sand amount of cutting and accounts for that 20-25%, the 3rd road sand amount of cutting account for 10-15%, the 4th road sand amount of cutting accounts for 5-10%; Base material sorting warehouse-in after the sanding.
Make ultralight matter E1 sheet material through above step and detect by GB/T 11718-2009 standard-required, the result is following:
| Performance indications | 12mmULE1A ultralight scutum | Ultralight scutum European standard |
| Density kg/m 3 | 548 | 500-550 |
| High density kg/m 3 | 850-900 | >=850 |
| Surface bonding strength MPa | 0.91 | |
| Plate moisture content % | 6.61 | 5-8 |
| Internal bond strength MPa | 0.61 | >=0.45 |
| MOR MPa | 16 | 16 |
| Thickness swelling rate % | 10.15 | ≤13 |
| Burst size of methanal mg/100g | 7.56 | ≤8 |
| Flatness (thickness of slab standard deviation) | 0.012-0.015 |
Claims (3)
1. the manufacturing process of a ultralight matter fiberboard; Comprise the steps: the timber peeling, chip, screen, washing, boiling, fiber separation, glue compounding and applying, dried, classified, the moulding of mating formation, precompressed, hot pressing, turnover panel cooling, sanding, check grade, packing is put in storage, it is characterized in that:
In the said boiling step, boiling material level 1.6 ~ 3m, 165 ~ 175 ℃ of boiling temperatures;
In the described fiber separation step, wood chip gets into grinding machine through the belt spiral, in grinding machine, adds melt paraffin simultaneously, applied amount 5.0 ~ 7.0kg/m
3, abrasive disk space 0 ~ 4mm;
In the said glue compounding and applying step, the resin added of cyanurotriamide modified urea resin adhesive is 195 ~ 210kg/m
3, the addition of curing agent is 1 ~ 2.5% with respect to the mass percent of over dry adhesive;
In the said heat-press step, 220 ~ 160 ℃ of hot pressing temperatures rise to press section 0 framework distance at 20 ~ 60mm, five sections humidity provinces, and hot pressing pressure is at 0 ~ 4MPa, the hot pressing factor 6 ~ 7.0s/mm, maximum pressure 1.3 ~ 1.8MPa.
2. the manufacturing process of ultralight matter fiberboard according to claim 1 is characterized in that described curing agent is the mixture of ammonium chloride and HA101 crosslinking agent, and the mass ratio of ammonium chloride and HA101 crosslinking agent is 3:1.
3. a method for preparing the cyanurotriamide modified urea resin adhesive of ultralight matter fiberboard manufacturing process as claimed in claim 1 is characterized in that: comprise
(1) adds and to account for the cyanurotriamide modified urea resin adhesive quality than being that 55% formaldehyde is in agitated reactor, with mass percent concentration 40% sodium hydroxide solution accent pH to 8.8-9.2;
(2), add melamine and urea, be warming up to 88-90 ℃ gradually, reaction 20min;
(3), the mol ratio of control formaldehyde and urea is at 1.9-2.2, at 85-90 ℃ of reaction 80-100min down, the formic acid accent pH to 5.0-6.0 with mass percent concentration 20% reacts to viscosity 18-19s;
(4), add urea and melamine, the mol ratio of formaldehyde and urea and melamine sum is reacted 25-35min at 1.30-1.45 at 78-88 ℃;
(5), add urea, the mol ratio that makes formaldehyde and urea and melamine sum is incubated 20-30min at 0.8-0.95 at 70-80 ℃, is cooled to 40 ℃ gradually, uses the sodium hydroxide solution adjust pH of mass percent concentration 40% to be 7.8-8.2;
In the above-mentioned steps, the total amount of melamine accounts for the 1.0-2.5% of whole liquid resin quality, and the mol ratio of formaldehyde and urea and melamine sum is at 0.8-0.95; Urea drops in three batches, and melamine divides two batches of inputs, and first melamine accounts for the 65-70% of melamine total amount, and second batch of melamine accounts for the 30-35% of melamine total amount;
(6), inject holding vessel, for use.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN103112073A (en) * | 2013-03-04 | 2013-05-22 | 云南玉加宝人造板有限公司 | Fiber plate and manufacture method thereof |
| CN103586958A (en) * | 2013-11-04 | 2014-02-19 | 大亚木业（肇庆）有限公司 | Manufacturing process for bamboo and wood composite fiberboards |
| CN103628362A (en) * | 2013-12-02 | 2014-03-12 | 大亚人造板集团有限公司 | Process for manufacturing damp-proof low-water-swelling floor base material and method for manufacturing adhesive |
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