CN115194907A - E NF Production process of grade fiber board - Google Patents
E NF Production process of grade fiber board Download PDFInfo
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- CN115194907A CN115194907A CN202210805612.2A CN202210805612A CN115194907A CN 115194907 A CN115194907 A CN 115194907A CN 202210805612 A CN202210805612 A CN 202210805612A CN 115194907 A CN115194907 A CN 115194907A
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- 239000011094 fiberboard Substances 0.000 title claims abstract description 48
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 claims abstract description 72
- 230000008569 process Effects 0.000 claims abstract description 47
- 230000001070 adhesive effect Effects 0.000 claims abstract description 38
- 239000000853 adhesive Substances 0.000 claims abstract description 37
- 239000012948 isocyanate Substances 0.000 claims abstract description 34
- 150000002513 isocyanates Chemical class 0.000 claims abstract description 34
- 239000011148 porous material Substances 0.000 claims abstract description 31
- 238000010411 cooking Methods 0.000 claims abstract description 25
- 229920001807 Urea-formaldehyde Polymers 0.000 claims abstract description 20
- 238000007731 hot pressing Methods 0.000 claims abstract description 19
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 claims abstract description 18
- 239000000835 fiber Substances 0.000 claims abstract description 17
- 238000004513 sizing Methods 0.000 claims abstract description 13
- 239000002023 wood Substances 0.000 claims abstract description 12
- 238000001035 drying Methods 0.000 claims abstract description 9
- 238000007689 inspection Methods 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 238000000227 grinding Methods 0.000 claims abstract description 5
- 238000004806 packaging method and process Methods 0.000 claims abstract description 5
- 238000012216 screening Methods 0.000 claims abstract description 5
- 238000000926 separation method Methods 0.000 claims abstract description 5
- 238000005406 washing Methods 0.000 claims abstract description 5
- 238000005507 spraying Methods 0.000 claims description 21
- 238000003860 storage Methods 0.000 claims description 11
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 239000012792 core layer Substances 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 238000012432 intermediate storage Methods 0.000 claims description 8
- 238000004321 preservation Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 239000011435 rock Substances 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 4
- 239000010456 wollastonite Substances 0.000 claims description 4
- 229910052882 wollastonite Inorganic materials 0.000 claims description 4
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims description 3
- 244000166124 Eucalyptus globulus Species 0.000 claims description 3
- 241000219000 Populus Species 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 229910021536 Zeolite Inorganic materials 0.000 claims description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 2
- 239000010881 fly ash Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 241000894007 species Species 0.000 claims description 2
- 239000010457 zeolite Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 23
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 8
- 238000004880 explosion Methods 0.000 abstract description 7
- 239000001569 carbon dioxide Substances 0.000 abstract description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 3
- 238000002360 preparation method Methods 0.000 abstract 1
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 241000234295 Musa Species 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 235000018290 Musa x paradisiaca Nutrition 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 230000003301 hydrolyzing effect Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 229920002522 Wood fibre Polymers 0.000 description 1
- XLJMAIOERFSOGZ-UHFFFAOYSA-N anhydrous cyanic acid Natural products OC#N XLJMAIOERFSOGZ-UHFFFAOYSA-N 0.000 description 1
- 235000021015 bananas Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000008570 general process Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002025 wood fiber Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
- B27L11/00—Manufacture of wood shavings, chips, powder, or the like; Tools therefor
- B27L11/08—Manufacture of wood shavings, chips, powder, or the like; Tools therefor of wood fibres, e.g. produced by tearing
-
- 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
-
- 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
- B27N1/02—Mixing the material with binding agent
- B27N1/0209—Methods, e.g. characterised by the composition of the agent
-
- 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
- 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
- B27N3/18—Auxiliary operations, e.g. preheating, humidifying, cutting-off
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Mechanical Engineering (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The invention belongs to the technical field of artificial boards, relates to the preparation of artificial boards, and particularly relates to an E-shaped artificial board NF The production process of the grade fiberboard comprises the working procedures of wood peeling → chipping → screening → water washing → precooking → cooking → hot grinding → sizing → fiber drying → applying inorganic porous material → paving → prepressing → hot pressing → cooling → sanding → inspection and the like → packaging and warehousing, wherein in the sizing working procedure, the added adhesive is 25-50 kg/m 3 Isocyanate adhesive; in the step of applying the inorganic porous material, 20 to 100kg/m of inorganic porous material is applied to the inlet of a separation air blower 3 Inorganic porousA material. The invention adds inorganic porous material in the production process, which is helpful to E NF The emission of carbon dioxide and water vapor in the production process of the grade fiberboard reduces the board explosion probability; invention E NF The production efficiency of the grade fiber board is only reduced by about 5 percent compared with the production efficiency of the urea-formaldehyde resin board making process; because the probability of board explosion is greatly reduced, the moisture content of the pavement fiber can be improved.
Description
Technical Field
The invention belongs toThe technical field of artificial boards relates to the production of fiberboards, in particular to an E NF A process for producing a grade fiberboard.
Background
The fiberboard is prepared by taking wood fiber as a raw material through processes of sizing, hot pressing and the like, has good physical and mechanical properties and processability, and is widely applied to the fields of building decoration, furniture, floors, doors and windows, packaging materials and the like. According to the regulation of GB/T39600-2021 Classification of Formaldehyde emission of Artificial Board and products thereof, the highest grade of the Formaldehyde emission of the artificial Board is E NF And (4) stages. In recent years, isocyanate adhesives are favored by many board-making enterprises at home and abroad due to the advantages of no formaldehyde addition, high mechanical strength, good adhesive property, low dosage and the like, and are used for producing and manufacturing environment-friendly fiber boards. The steel strip temperature of a hot-pressing process for producing the fiberboard is generally 180-235 ℃, the surface layer of the board blank is high in temperature, the reaction rate of isocyanate adhesive and fiber and water is high, a high-compactness layer is formed on the surface of the board blank to influence heat transfer, the temperature of a core layer is low at the moment, the temperature of the core layer of the board blank can reach 80-110 ℃ along with the hot-pressing process, the reaction rate of the isocyanate adhesive and the fiber of the core layer is low at the temperature, the bonding strength in the core layer of the board blank is not high, the reaction rate of the isocyanate adhesive and the fiber needs to be improved by reducing the speed, the yield of the fiber board produced by using the isocyanate adhesive is about 15-30% lower than that of urea-formaldehyde resin, the stay time of the board blank in a press is prolonged, and the water content of the board is low.
The group-N = C = O in the isocyanate adhesive is easy to react with water in the hot-pressing process of the fiber board to generate a large amount of carbon dioxide gas, and simultaneously, the moisture in the board blank is gasified due to high temperature, the exhausting caused by a high-density layer on the surface formed by the reaction of the fiber and the isocyanate adhesive is difficult, and the bonding strength in the core layer of the board blank is not high, so that the board is easy to explode. After the board is exploded, the rate of carbon dioxide generated by reaction of isocyanate adhesive and water needs to be reduced by reducing the moisture content of the paving fiber, so that the moisture content of the fiber board discharged from a press is too low, the problems of bending and deformation of bananas in secondary processing pressing and pasting are caused, and the practical application cannot be realized. Some fiberboard production enterprises try to improve the moisture content of finished boards by methods of improving the curing time, improving the humidity of the storage environment and the like, but the method can cause the difference of the moisture content of the finished boards at different positions to be too large, and the secondary processing deformation is more serious. E NF The lower water content of the fiber board is the result of E NF One of the important factors of difficulty in application and popularization of the grade fiberboard, thus solving the problem of E NF The problems of plate explosion and low water content in the generation process of the grade fiberboard and promotion of E NF The application and popularization of the grade fiber board are very important.
Based on the current situation, the invention discloses an E NF Production process of grade fiber board, adopting said production process can solve E NF The problems of board explosion, low water content and the like in the production process of the grade fiberboard can be solved, the production efficiency can be greatly improved, and the promotion of E is facilitated NF The application and popularization of the grade fiberboard have great significance.
Disclosure of Invention
The invention aims to disclose a NF Process for producing a graded fiber board, such as E NF The grade fiber board uses isocyanate adhesive, is added with inorganic porous material, and the formaldehyde emission of the fiber board produced by adopting a specific process reaches the highest grade E in GB/T39600-2021 Classification of formaldehyde emission of artificial boards and products thereof NF The grade and physical mechanical properties meet the standard requirements of LY/T1611-2011 fiberboard for floor base materials, particularly the water content index, the process sampling water content can reach the level of 4.5-5.5 percent, and the problem of E is solved NF The secondary processing banana bending and deformation of the grade fiberboard caused by low water content. Simultaneously adopting the process to produce E NF The grade fiber board can also greatly reduce the board explosion probability in the production process and improve the productivity.
E NF A process for producing a grade fiberboard, comprising: wood peeling → chipping → screening → washing → precooking → cooking → hot grinding → sizing → fiber drying → application of inorganic porous material → paving → prepressing → hot pressing → cooling → sanding → inspection and the like → packaging and warehousing process, wherein:
in the wood peeling procedure, the wood species is one of poplar and eucalyptus;
in the pre-cooking procedure, the pre-cooking temperature is between 90 and 100 ℃;
in the cooking procedure, the cooking temperature is controlled to be 160-180 ℃, and the cooking time is controlled to be 5-6 min;
in the sizing procedure, the added adhesive is isocyanate adhesive, the adhesive is uniformly sprayed on the surface of the fiber at a position 2-3 m away from the outlet of the drying tube, and the application amount of the isocyanate adhesive is 25-50 kg/m 3 (ii) a The isocyanate adhesive is subjected to heat preservation treatment in the processes of storage and pipeline transportation, the temperature of the storage tank is kept between 40 ℃ and 60 ℃, two intermediate storage tanks are arranged between the storage tanks and the application outlet, and the intermediate storage tanks are provided with heat preservation systems, and the temperature is kept between 40 ℃ and 60 ℃.
In the working procedure of applying the inorganic porous material, the inorganic porous material is applied at the inlet of a separation air blower, a continuous spiral blanking machine is used, and the addition amount of the inorganic porous material is controlled by a variable frequency speed regulating motor and is 20-100 kg/m 3 。
In the paving procedure, a wet spraying device is adopted to spray water vapor on two sides of the width direction of the plate blank, the wet spraying range is 10-20 cm (the distance from the side part to the middle part in the width direction of the plate blank), and the moisture spraying amount is 50-200 g/m.
In the hot pressing process, high-temperature steam is sprayed to the upper surface of the plate blank at the inlet of a press, the steam temperature is 120-150 ℃, the steam quantity is 150-300 kg/h, and the lower surface is provided with a vacuum suction system to quickly suck the steam from the upper surface to the lower surface of the plate blank, so that the temperature of a core layer of the plate blank is quickly increased.
Furthermore, the hot pressing adopts a continuous press, and five sections of temperature and pressure areas are adopted for control, wherein the temperature of the first area and the second area is 5-10 ℃ higher than that of the urea-formaldehyde resin board making process, the temperature of the third area is 5-10 ℃ lower than that of the urea-formaldehyde resin board making process, and the pressure of the third area is 50-200N/m higher than that of the urea-formaldehyde resin board making process 2 The press speed is reduced by about 5 percent compared with the process for manufacturing the plate by the urea-formaldehyde resin.
In a general process for manufacturing a plate by using urea-formaldehyde resin with the thickness of 10mm, the temperature of a first area is 225-230 ℃, the temperature of a second area is 220-225 ℃, the temperature of a third area is 205-210 ℃, and the pressure of the third area is 30-80N/cm 2 The press speed is 420-430 mm/s.
In the better disclosure example of the invention, in order to prevent the slab from sticking to the hot press steel strip, before the slab enters the hot press, the surfaces of the upper and lower steel strips are sprayed with the release agent in advance for 10-30 min, and the spraying amount is 20-30 g/m 2 (ii) a After the plate blank enters a hot press, the spraying amount of the release agent is adjusted to 10-20 g/m 2 。
Further, the mold release agent was 3703 produced by shima germany.
In the preferred disclosed embodiment of the invention, the isocyanate adhesive is a mixture of isocyanate with functionality of 2.6-2.7 and diphenylmethane diisocyanate, and is a light brown liquid at room temperature, and the specific indexes are as follows: the viscosity (25 ℃) is 150 to 250 mPas, the content of isocyanic acid radical (-NCO) is 30.5 to 32.0 percent, and the density (25 ℃) is 1.220 to 1.250g/cm 3 The acidity is less than or equal to 0.030 percent, the hydrolytic chlorine is less than or equal to 0.20 percent, and the iron content is less than or equal to 20 microgram/g.
In the preferred embodiment of the invention, the inorganic porous material comprises one or a mixture of more of volcanic rock, porous alumina, wollastonite, diatomite, zeolite and fly ash, and the average particle size is between 20 and 200 meshes.
The formaldehyde emission of the fiber board produced by the invention reaches the highest grade E in GB/T39600-2021 Classification of formaldehyde emission of artificial boards and products thereof NF The grade and physical mechanical properties meet the standard requirements of LY/T1611-2011 fiberboard for floor base materials, particularly the water content index, the process sampling water content can reach the level of 4.5-5.5 percent, and the problem of E is solved NF The secondary processing banana bending and deformation of the grade fiberboard caused by low water content. Simultaneously adopting the process to produce E NF The grade fiberboard can also greatly reduce the board explosion probability in the production process and improve the productivity.
Advantageous effects
The invention aims at producing E by using isocyanate adhesive NF The defects of explosive board, low productivity, low water content of the board and the like of the grade fiberboard are overcome, and the inorganic porous material is added in the production process and has the characteristics of low density and high porosity, so that the inorganic porous material is beneficial to the E NF Graded fiberboardThe emission of carbon dioxide and water vapor in the production process can greatly reduce the probability of plate explosion; e, spraying high-temperature steam before the plate blank enters a hot press, being beneficial to quickly improving the temperature of a plate blank core layer, and improving the curing rate of isocyanate adhesive and fiber of the plate blank core layer, thereby improving the speed of the press NF The production efficiency of the grade fiber board is only reduced by about 5 percent compared with the production efficiency of the urea-formaldehyde resin; because of the board probability of exploding reduces by a wide margin, can improve the fibre moisture content of mating formation, because of production efficiency improves, has reduced the time that the slab stayed in the hot press, can reduce the water consumption to can improve the moisture content of finished product board.
Detailed Description
The present invention will be described in detail below with reference to examples to enable those skilled in the art to better understand the present invention, but the present invention is not limited to the following examples.
Example 1
10mmE NF The production process of the grade fiberboard comprises the following steps: wood peeling → chipping → screening → washing → precooking → cooking → hot grinding → sizing → fiber drying → application of inorganic porous material → paving → prepressing → hot pressing → cooling → sanding → inspection and sorting → packaging and warehousing, thus obtaining the first finished board.
The wood peeling procedure is to peel the branches of the poplar by a peeling machine;
in the pre-cooking process, the pre-cooking temperature is 90-95 ℃;
in the cooking process, the cooking temperature is 175 ℃, and the cooking time is 5min;
in the sizing procedure, the added adhesive is isocyanate adhesive, the adhesive is uniformly sprayed on the surface of the fiber at a position 2-3 m away from the outlet of the drying tube, and the application amount of the isocyanate adhesive is 35kg/m 3 (ii) a The isocyanate adhesive is stored and heat preservation treatment is carried out in the pipeline conveying process, the temperature of the storage tank is kept at 45 ℃, two intermediate storage tanks are arranged between the storage tank and the application outlet, the intermediate storage tanks are provided with heat preservation systems, and the temperature is kept at 45 ℃.
In the step of applying the inorganic porous material, the inorganic porous material is applied at the inlet of a separation air blowerThe inorganic porous material is prepared by using a continuous spiral blanking machine and controlling the addition amount of the inorganic porous material through a variable frequency speed regulating motor, wherein the addition amount of the inorganic porous material is 40kg/m 3 。
In the paving procedure, a wet spraying device is adopted to spray water vapor on two sides of the width direction of the plate blank, the wet spraying range is 10-20 cm (the distance from the side parts to the middle part in the width direction of the plate blank), and the moisture spraying amount of the water vapor is 100g/m.
In the hot pressing process, high-temperature steam is sprayed to the upper surface of the slab at the inlet of a press, the steam temperature is 130 ℃, the steam quantity is 180kg/h, and the lower surface of the slab is provided with a vacuum suction system for quickly sucking the steam from the upper surface to the lower surface of the slab. The hot pressing is carried out by a continuous press, E NF The hot pressing process of the grade fiber board adopts five-section temperature and pressure area control, the temperature of a first area and a second area is 5-10 ℃ higher than that of the urea-formaldehyde resin process, the temperature of a third area is 5-10 ℃ lower than that of the urea-formaldehyde resin process, and the pressure of the third area is 50-200N/m higher than that of the urea-formaldehyde resin process 2 The press speed is reduced by about 5% compared with the urea resin process.
In order to prevent the slab from sticking to the steel strip of the hot press, the surfaces of the upper and lower steel strips are sprayed with a release agent in advance for 30min before the slab enters the hot press, wherein the release agent is 3703 produced by Germany Huoshi, and the spraying amount is 30g/m 2 (ii) a After the plate blank enters the hot press, the spraying amount of the release agent is adjusted to be 20g/m 2 。
The isocyanate adhesive is a mixture containing a certain amount of isocyanate with higher functionality and diphenylmethane diisocyanate, the functionality is 2.6-2.7, the isocyanate adhesive is light brown liquid at room temperature, and the specific indexes are as follows: the viscosity (25 ℃) is 150 to 250 mPas, the isocyanate content (-NCO) is 30.5 to 32.0 percent, and the density (25 ℃) is 1.220 to 1.250g/cm 3 The acidity is less than or equal to 0.030 percent, the hydrolytic chlorine is less than or equal to 0.20 percent, and the iron content is less than or equal to 20 mu g/g.
The inorganic porous material of the present invention comprises: volcanic rock: the porous alumina is as follows: wollastonite =1:1:1, the average grain diameter is between 50 and 80 meshes.
The detection data of the finished board I are shown in the table 1.
TABLE 1 finished Board-inspection data
Example 2
12mmE NF The production process of the grade fiberboard comprises the following steps: wood peeling → chipping → screening → washing → precooking → cooking → hot grinding → sizing → fiber drying → application of inorganic porous material → paving → prepressing → hot pressing → cooling → sanding → inspection and sorting → packaging and warehousing, thus obtaining the second finished board.
The wood peeling procedure is to peel the eucalyptus wood branches by a peeling machine;
in the pre-cooking process, the pre-cooking temperature is 90-95 ℃;
in the cooking process, the cooking temperature is 170 ℃, and the cooking time is 5min;
in the sizing procedure, the added adhesive is isocyanate adhesive, the isocyanate adhesive is uniformly sprayed on the surface of the fiber at a position 2-3 meters away from the outlet of the drying tube, and the application amount of the isocyanate adhesive is 40kg/m 3 (ii) a The isocyanate adhesive is stored and heat preservation treatment is carried out in the pipeline conveying process, the temperature of the storage tank is kept at 50 ℃, two intermediate storage tanks are arranged between the storage tank and the application outlet, the intermediate storage tanks are provided with heat preservation systems, and the temperature is kept at 50 ℃.
In the working procedure of applying the inorganic porous material, the inorganic porous material is applied at the inlet of a separation air blower, a continuous spiral blanking machine is used, the addition amount of the inorganic porous material is controlled by a variable frequency speed regulating motor, and the addition amount of the inorganic porous material is 60kg/m 3 。
In the paving procedure, a wet spraying device is adopted to spray water vapor on two sides of the width direction of the plate blank, the wet spraying range is 10-20 cm (the distance from the side part to the middle part in the width direction of the plate blank), and the moisture spraying amount of the water vapor is 120g/m.
In the hot pressing procedure, the height is sprayed to the upper surface of the plate blank at the inlet of the pressThe temperature of the warm steam is 135 ℃, the steam amount is 200kg/h, the lower surface is provided with a vacuum suction system, and the steam is quickly sucked from the upper surface to the lower surface of the slab, so that the temperature of a core layer of the slab is quickly improved. The hot pressing is carried out by a continuous press, E NF The hot pressing process of the grade fiber board adopts five-section temperature and pressure area control, the temperature of a first area and a second area is 5-10 ℃ higher than that of the urea-formaldehyde resin process, the temperature of a third area is 5-10 ℃ lower than that of the urea-formaldehyde resin process, and the pressure of the third area is 50-200N/m higher than that of the urea-formaldehyde resin process 2 The press speed is reduced by about 5% compared with the urea resin process.
In order to prevent the plate blank from sticking to the steel strip of the hot press, the surfaces of the upper and lower steel strips are sprayed with a release agent for 30min in advance before the plate blank enters the hot press, the release agent is 3703 produced by Germany Huoshi, and the spraying amount is 30g/m 2 (ii) a After the plate blank enters the hot press, the spraying amount of the release agent is adjusted to be 20g/m 2 。
The inorganic porous material of the present invention comprises: volcanic rock: the porous alumina is as follows: wollastonite =2:1:1, the average grain diameter is between 50 and 80 meshes.
The detection data of the second finished board are shown in the table 2.
TABLE 2 second detection data of finished board
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields are included in the scope of the present invention.
Claims (10)
1. E NF The production process of the grade fiber board comprises the procedures of wood peeling → chipping → screening → washing → precooking → cooking → hot grinding → sizing → fiber drying → applying inorganic porous material → paving → prepressing → hot pressing → cooling → sanding → inspection and the like → packaging and warehousing, and is characterized in that:
in the sizing process, the additivesThe added adhesive is isocyanate adhesive, the adding mode is that the isocyanate adhesive is evenly sprayed on the surface of the fiber at a position 2-3 meters away from the outlet of the drying tube, and the application amount of the isocyanate adhesive is 25-50 kg/m 3 ；
In the working procedure of applying the inorganic porous material, the inorganic porous material is applied at the inlet of a separation air blower, a continuous spiral blanking machine is used, and the addition amount of the inorganic porous material is controlled by a variable frequency speed regulating motor and is 20-100 kg/m 3 。
2. E according to claim 1 NF The production process of the grade fiberboard is characterized by comprising the following steps: in the procedure of peeling the wood, the wood species is one of poplar and eucalyptus.
3. E according to claim 1 NF The production process of the grade fiberboard is characterized in that: in the pre-cooking process, the pre-cooking temperature is 90-100 ℃.
4. E according to claim 1 NF The production process of the grade fiberboard is characterized by comprising the following steps: in the cooking procedure, the cooking temperature is 160-180 ℃, and the cooking time is 5-6 min.
5. E according to claim 1 NF The production process of the grade fiberboard is characterized by comprising the following steps: in the sizing procedure, the isocyanate adhesive is subjected to heat preservation treatment in the processes of storage and pipeline transportation, the temperature of the storage tank is kept between 40 ℃ and 60 ℃, two intermediate storage tanks are arranged between the storage tanks and the application outlet, the intermediate storage tanks are provided with heat preservation systems, and the temperature is kept between 40 ℃ and 60 ℃.
6. E according to claim 1 NF The production process of the grade fiberboard is characterized by comprising the following steps: in the sizing procedure, the isocyanate adhesive is a mixture of isocyanate with the functionality of 2.6-2.7 and diphenylmethane diisocyanate, and is light brown liquid at room temperature.
7. E according to claim 1 NF The production process of the grade fiberboard is characterized in that: in the step of applying the inorganic porous material, the inorganic porous material comprises one or a mixture of more of volcanic rock, porous alumina, wollastonite, diatomite, zeolite and fly ash, and the average particle size is 20-200 meshes.
8. E according to claim 1 NF The production process of the grade fiberboard is characterized by comprising the following steps: in the paving procedure, a wet spraying device is adopted to spray steam on two sides of the width direction of the plate blank, the wet spraying range is 10-20 cm, namely, the width direction of the plate blank extends from the sides to the middle, and the moisture spraying amount is 50-200 g/m.
9. E according to claim 1 NF The production process of the grade fiberboard is characterized by comprising the following steps: in the hot pressing process, high-temperature steam is sprayed to the upper surface of the plate blank at the inlet of a press, the steam temperature is 120-150 ℃, the steam quantity is 150-300 kg/h, a vacuum suction system is arranged on the lower surface, and the steam is quickly sucked from the upper surface to the lower surface of the plate blank, so that the temperature of a core layer of the plate blank is quickly increased; furthermore, the hot pressing adopts a continuous press, and five sections of temperature and pressure areas are adopted for control, wherein the temperature of the first area and the second area is 5-10 ℃ higher than that of the urea-formaldehyde resin board making process, the temperature of the third area is 5-10 ℃ lower than that of the urea-formaldehyde resin board making process, and the pressure of the third area is 50-200N/m higher than that of the urea-formaldehyde resin board making process 2 The press speed is reduced by about 5% compared with the process for manufacturing the plate by the urea-formaldehyde resin.
10. E according to claim 1 NF The production process of the grade fiberboard is characterized in that: in order to prevent the plate blank from being adhered to the hot press steel belt, before the plate blank enters the hot press, the surfaces of the upper and lower steel belts are sprayed with a release agent for 10-30 min in advance, and the spraying amount is 20-30 g/m 2 (ii) a After the plate blank enters a hot press, the spraying amount of the release agent is adjusted to 10-20 g/m 2 。
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5422170A (en) * | 1992-03-31 | 1995-06-06 | Yamaha Corporation | Wood based panels |
| JP2004122729A (en) * | 2002-10-07 | 2004-04-22 | Kimura Chem Plants Co Ltd | Porous wood flour board and method for manufacturing it |
| CN101148057A (en) * | 2006-09-19 | 2008-03-26 | 中国科学院过程工程研究所 | Caragana composite artificial plate and preparation method |
| CN101234505A (en) * | 2008-02-29 | 2008-08-06 | 上海大学 | Water-soluble polyalcohol, polyisocyanic acid ester and stalk fibrous composite material and preparation thereof |
| CN102632536A (en) * | 2012-04-20 | 2012-08-15 | 金永镇 | Processing method of diatomite wood-based fiberboard |
| CN104290169A (en) * | 2014-09-11 | 2015-01-21 | 大亚人造板集团有限公司 | Manufacturing technique of formaldehyde-free density fiber board |
| CN107891503A (en) * | 2017-10-24 | 2018-04-10 | 王德善 | A kind of environment-friendly sheet and preparation method thereof |
| CN109666308A (en) * | 2018-12-21 | 2019-04-23 | 许艺铧 | A kind of straw building plate and its manufacturing method |
| CN111098384A (en) * | 2019-12-28 | 2020-05-05 | 云南新泽兴人造板有限公司 | Continuous flat-pressing steam-jetting and hot-pressing process for shaving board blank |
| CN114311214A (en) * | 2021-12-10 | 2022-04-12 | 大亚人造板集团有限公司 | Manufacturing process of artificial board containing inorganic fiber |
-
2022
- 2022-07-08 CN CN202210805612.2A patent/CN115194907A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5422170A (en) * | 1992-03-31 | 1995-06-06 | Yamaha Corporation | Wood based panels |
| JP2004122729A (en) * | 2002-10-07 | 2004-04-22 | Kimura Chem Plants Co Ltd | Porous wood flour board and method for manufacturing it |
| CN101148057A (en) * | 2006-09-19 | 2008-03-26 | 中国科学院过程工程研究所 | Caragana composite artificial plate and preparation method |
| CN101234505A (en) * | 2008-02-29 | 2008-08-06 | 上海大学 | Water-soluble polyalcohol, polyisocyanic acid ester and stalk fibrous composite material and preparation thereof |
| CN102632536A (en) * | 2012-04-20 | 2012-08-15 | 金永镇 | Processing method of diatomite wood-based fiberboard |
| CN104290169A (en) * | 2014-09-11 | 2015-01-21 | 大亚人造板集团有限公司 | Manufacturing technique of formaldehyde-free density fiber board |
| CN107891503A (en) * | 2017-10-24 | 2018-04-10 | 王德善 | A kind of environment-friendly sheet and preparation method thereof |
| CN109666308A (en) * | 2018-12-21 | 2019-04-23 | 许艺铧 | A kind of straw building plate and its manufacturing method |
| CN111098384A (en) * | 2019-12-28 | 2020-05-05 | 云南新泽兴人造板有限公司 | Continuous flat-pressing steam-jetting and hot-pressing process for shaving board blank |
| CN114311214A (en) * | 2021-12-10 | 2022-04-12 | 大亚人造板集团有限公司 | Manufacturing process of artificial board containing inorganic fiber |
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Application publication date: 20221018 |