CN114770687B - High-temperature shaping method for solid wood board - Google Patents
High-temperature shaping method for solid wood board Download PDFInfo
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- CN114770687B CN114770687B CN202210364457.5A CN202210364457A CN114770687B CN 114770687 B CN114770687 B CN 114770687B CN 202210364457 A CN202210364457 A CN 202210364457A CN 114770687 B CN114770687 B CN 114770687B
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- 239000002023 wood Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000007787 solid Substances 0.000 title claims abstract description 31
- 238000007493 shaping process Methods 0.000 title abstract description 14
- 238000004321 preservation Methods 0.000 claims abstract description 40
- 238000003763 carbonization Methods 0.000 claims abstract description 18
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 238000011282 treatment Methods 0.000 claims abstract description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 22
- 238000004513 sizing Methods 0.000 claims description 12
- 238000005507 spraying Methods 0.000 claims description 10
- RCFVMJKOEJFGTM-UHFFFAOYSA-N cerium zirconium Chemical compound [Zr].[Ce] RCFVMJKOEJFGTM-UHFFFAOYSA-N 0.000 claims description 6
- 229920000767 polyaniline Polymers 0.000 claims description 6
- 239000006104 solid solution Substances 0.000 claims description 6
- 150000004670 unsaturated fatty acids Chemical class 0.000 claims description 6
- 235000021122 unsaturated fatty acids Nutrition 0.000 claims description 6
- CDQSJQSWAWPGKG-UHFFFAOYSA-N butane-1,1-diol Chemical compound CCCC(O)O CDQSJQSWAWPGKG-UHFFFAOYSA-N 0.000 claims description 5
- LSHROXHEILXKHM-UHFFFAOYSA-N n'-[2-[2-[2-(2-aminoethylamino)ethylamino]ethylamino]ethyl]ethane-1,2-diamine Chemical compound NCCNCCNCCNCCNCCN LSHROXHEILXKHM-UHFFFAOYSA-N 0.000 claims description 5
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 5
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 5
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 5
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims description 3
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims description 3
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims description 3
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000005642 Oleic acid Substances 0.000 claims description 3
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims description 3
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims description 3
- DPUOLQHDNGRHBS-UHFFFAOYSA-N Brassidinsaeure Natural products CCCCCCCCC=CCCCCCCCCCCCC(O)=O DPUOLQHDNGRHBS-UHFFFAOYSA-N 0.000 claims description 2
- URXZXNYJPAJJOQ-UHFFFAOYSA-N Erucic acid Natural products CCCCCCC=CCCCCCCCCCCCC(O)=O URXZXNYJPAJJOQ-UHFFFAOYSA-N 0.000 claims description 2
- OYHQOLUKZRVURQ-HZJYTTRNSA-N Linoleic acid Chemical compound CCCCC\C=C/C\C=C/CCCCCCCC(O)=O OYHQOLUKZRVURQ-HZJYTTRNSA-N 0.000 claims description 2
- DPUOLQHDNGRHBS-KTKRTIGZSA-N erucic acid Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(O)=O DPUOLQHDNGRHBS-KTKRTIGZSA-N 0.000 claims description 2
- 235000020778 linoleic acid Nutrition 0.000 claims description 2
- OYHQOLUKZRVURQ-IXWMQOLASA-N linoleic acid Natural products CCCCC\C=C/C\C=C\CCCCCCCC(O)=O OYHQOLUKZRVURQ-IXWMQOLASA-N 0.000 claims description 2
- 235000021313 oleic acid Nutrition 0.000 claims description 2
- TUNFSRHWOTWDNC-HKGQFRNVSA-N tetradecanoic acid Chemical compound CCCCCCCCCCCCC[14C](O)=O TUNFSRHWOTWDNC-HKGQFRNVSA-N 0.000 claims description 2
- 239000007921 spray Substances 0.000 claims 1
- 229920002522 Wood fibre Polymers 0.000 abstract description 18
- 239000002025 wood fiber Substances 0.000 abstract description 18
- 238000005336 cracking Methods 0.000 abstract description 15
- 230000006798 recombination Effects 0.000 abstract description 7
- 238000005215 recombination Methods 0.000 abstract description 7
- 238000012545 processing Methods 0.000 abstract description 5
- 238000010000 carbonizing Methods 0.000 abstract 1
- 230000008569 process Effects 0.000 description 14
- 238000004519 manufacturing process Methods 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 238000001035 drying Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
- B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
- B27M1/06—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching by burning or charring, e.g. cutting with hot wire
-
- 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
- B27K3/52—Impregnating agents containing mixtures of inorganic and organic compounds
-
- 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
- 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
- B27K5/009—Thermal treatments, i.e. involving chemical modification of wood at temperatures well over 100°C using a well-defined temperature schedule
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The application discloses a high-temperature shaping method for solid wood boards, and belongs to the technical field of board processing. The method comprises the following steps: (1) Placing the plate in a carbonization furnace, and continuously performing 9 step temperature rise-heat preservation from 40 ℃ to obtain an intermediate plate, wherein in the 9 step temperature rise-heat preservation: the temperature of the next stage is increased by 10-20 ℃ compared with the temperature of the previous stage, and the next stage is carried out after the temperature of each stage is raised and is kept for 1-3 hours; (2) And 7 staged cooling-heat preservation treatments are carried out on the intermediate plate, wherein in the 7 staged cooling-heat preservation treatments, the temperature of the next stage is reduced by 15-25 ℃ compared with that of the previous stage, and the next stage is carried out after heat preservation is carried out for 1-3h after each stage of cooling. The method can be used for deeply carbonizing the plate, so that the recombination of the wood fiber structure in the plate is more thorough, and the internal cracking of the plate is avoided, thereby reducing the deformation and cracking of the plate and improving the temperature resistance of the plate.
Description
Technical Field
The application relates to a high-temperature shaping method for solid wood boards, and belongs to the technical field of board processing.
Background
At present, most of plates dried by using a drying kiln in the market are natural drying plates, and some plates are natural drying plates, the defects that wood fibers of the plates are not damaged and are easy to deform and crack, the processing production period of products is long, the production period of the drying kiln is 7-15 days, the natural drying time is longer and uncertain factors are more, the traditional natural drying and drying process only reduces the water content of the plates and cannot damage the wood fiber structure of the plates, the probability of cracking and deformation is high, and great property loss can be caused.
The high-temperature carbonization and shaping process for solid wood is a novel process for preventing deformation and cracking of the solid wood by destroying the wood fiber structure of a plate through high-temperature carbonization so as to enable the solid wood to be recombined. The existing solid wood high-temperature carbonization process usually comprises three steps of heating, heat preservation and cooling, deep carbonization cannot be performed on a plate, the recombination of a wood fiber structure is incomplete, cracks can be formed inside the plate, the deformation and cracking probability of the obtained plate is reduced relative to natural drying, but the phenomena of deformation, cracking, slag falling and the like can still occur in some high-temperature places.
Disclosure of Invention
In order to solve the problems, the method provides a solid wood board high-temperature shaping method, the method adopts 9 staged heating-heat preservation and 7 staged cooling-heat preservation processes, the board can be deeply carbonized by raising and lowering the temperature section by section, the wood fiber structure in the board is more thoroughly recombined, the internal cracking of the board is avoided, the deformation and cracking of the board are reduced, and the board treated by the method can be used for a long time in a high-temperature place.
The application provides a high-temperature setting method for solid wood boards, which comprises the following steps:
(1) Placing the plate in a carbonization furnace, and continuously performing 9 step temperature rise-heat preservation from 40 ℃ to obtain an intermediate plate, wherein in the 9 step temperature rise-heat preservation: the temperature of the next stage is increased by 10-20 ℃ compared with the temperature of the previous stage, and the next stage is carried out after the temperature of each stage is raised and is kept for 1-3 hours;
(2) And 7 staged cooling-heat preservation treatments are carried out on the intermediate plate, wherein in the 7 staged cooling-heat preservation treatments, the temperature of the next stage is reduced by 15-25 ℃ compared with that of the previous stage, and the next stage is carried out after heat preservation is carried out for 1-3 hours after each stage of cooling.
The 9 step temperature rise and heat preservation processes sequentially treat the board, so that the wood fiber structure can be gradually softened and recombined to achieve the purpose of deep carbonization of the board, and the 7 step temperature fall and heat preservation processes are used for shaping the recombined wood fiber structure to reduce the deformation and cracking of the board.
The heat preservation time of this application is all to timing again after reaching the stable temperature of next stage.
Optionally, in the step (1), the temperature rise rate of each stage is 0.2 ℃/min, and the final temperature of the 9 th stage is 180-210 ℃; too fast a heating rate will lead to cracks in the sheet, thus reducing the utilization rate of the sheet, and too slow a heating rate will reduce the production efficiency. The final temperature of the 9 th stage can realize deep carbonization of the plate, and the recombination effect of the wood fiber structure is the best.
In the step (2), the cooling rate of each stage is 0.3-0.5 ℃/min, if the cooling rate is too slow, the production period is prolonged, the production cost is increased, if the cooling rate is too fast, the thermal stress in the plate cannot be completely released, and finally the plate is deformed.
Optionally, in the step (1), the heat preservation time of the 1 st stage to the 4 th stage is 1h, and the heat preservation time of the 5 th stage to the 9 th stage is 3h; in the step (2), the heat preservation time of each stage is 2h. The heating-heat preservation process mainly realizes gradual softening and recombination of the wood fiber structure, the earlier-stage wood fiber structure is heated little, the softening and recombination degree is light, and the uniform transition of the heating degree of the wood is mainly realized, so the set heat preservation time is short, the setting can also improve the production efficiency, the later-stage wood fiber structure recombination speed is high, in order to realize deep carbonization, the heat preservation time is prolonged, if the heat preservation time of each stage in the step (2) is the same, the deep shaping is carried out on the recombined wood fiber structure, the binding force between the wood fibers is improved, the temperature resistance of the wood is improved, meanwhile, the release of the thermal stress in the wood is facilitated, and the service life of the wood is prolonged.
Optionally, steam is also introduced in the step (1), and the steam load rate is 0-0.5% at the temperature of below 100 ℃, 1-4.5% at the temperature of 100-160 ℃, and 5-10% at the temperature of above 160 ℃. The steam is introduced to increase the humidity in the carbonization furnace, prevent the cracking of the plate in the high-temperature carbonization process, reduce the resin in the furnace and avoid the spontaneous combustion of the plate in the carbonization furnace.
Optionally, a shaping agent is also sprayed in the step (1), wherein the shaping agent consists of a component A and a component B,
the component A comprises any one or more of polyvinylpyrrolidone, cerium-zirconium solid solution and polyaniline;
the component B consists of unsaturated fatty acid, pentaethylene hexamine and butanediol.
A component and B component adsorb in spraying at the surface and the inside of panel, and the carbonization can take place along with in the processing of step (1) and step (2) for A component to fill the space between the wood fiber structure of panel, play spacing design effect to wood fiber structure, can also strengthen the intensity of panel self, reduce the deformation of panel. The component B reacts in the treatment process, and the formed substance can play a role in bonding the plate and inhibiting the movement of a fiber molecular chain, so that the permanent setting effect of the plate is improved.
Optionally, the weight ratio of the component a to the component B is 1: (5-20).
Optionally, in the component A, the weight ratio of polyvinylpyrrolidone, cerium-zirconium solid solution and polyaniline is (0-3): (5-10): (1-2).
Optionally, in the component B, the molar ratio of the unsaturated fatty acid, the pentaethylenehexamine and the butanediol is 1.5:1: (10-20).
Optionally, the unsaturated fatty acid is selected from any one or more of myristic acid, oleic acid, linoleic acid and erucic acid.
Optionally, the weight of the sizing agent sprayed is 0.5% of the weight of the plate at a temperature below 100 ℃, the weight of the sizing agent sprayed is 2% of the weight of the plate at a temperature within a range of 100-160 ℃, and the sizing agent is not sprayed at a temperature above 160 ℃. The setting is beneficial to the two components of the setting agent to respectively exert the best effect, and can also ensure that the synergistic effect of the two components is the best, thereby ensuring the safe production.
Benefits of the present application include, but are not limited to:
1. according to the solid wood board high-temperature shaping method, the processing time of the solid wood board can be shortened, the production efficiency is improved, the deformation rate and the cracking rate of the prepared solid wood board are greatly reduced, the temperature resistance of the solid wood board is improved, and the possibility is provided for the solid wood board to be used in a high-temperature place.
2. According to the solid wood board high-temperature shaping method, the solid wood board is treated stage by stage, deep carbonization can be carried out on the solid wood board, the recombination of the wood fiber structure in the board is more thorough, the service life of the solid wood board is prolonged, and cracking in the board is avoided.
3. According to the solid wood board high-temperature shaping method, during temperature rising-heat preservation, steam spraying can guarantee safe production, the shaping agent spraying can solidify and shape the interior of the board, and the water content of the board can be reduced during the temperature lowering-heat preservation process, so that the high-quality solid wood board is prepared.
Detailed Description
The present application will be described in detail with reference to examples, but the present application is not limited to these examples.
Unless otherwise specified, the raw materials in the examples of the present application were all purchased commercially.
In order to avoid inaccurate test results caused by external factors, the quality and the size of the solid wood boards used in the following embodiments are set to be consistent, and the solid wood boards can be made of materials commonly used in the prior art, which is not described herein again.
Example 1
The embodiment of the application relates to a high-temperature setting method for solid wood boards, which comprises the following steps:
(1) Placing the plate in a carbonization furnace, continuously performing 9 stages of temperature rise and heat preservation from 40 ℃ to obtain an intermediate plate, wherein the temperature rise rate of each stage is 0.2 ℃/min, the temperature is kept for 1h at 50 ℃ in the first stage, the temperature is kept for 1h at 60 ℃ in the second stage, the temperature is kept for 1h at 70 ℃ in the third stage, the temperature is kept for 1h at 80 ℃ in the fourth stage, the temperature is kept for 3h at 100 ℃ in the fifth stage, the temperature is kept for 120 ℃ in the sixth stage, the temperature is kept for 3h at 140 ℃ in the seventh stage, the temperature is kept for 3h at 160 ℃ in the eighth stage, the temperature is kept for 3h at 180 ℃ in the ninth stage, and the temperature is kept for 3h; the steel plate forming agent is characterized in that the steel plate forming agent is prepared by the following steps of (1) spraying a sizing agent at the temperature of below 100 ℃, wherein the steam load rate is 0%, the spraying weight of the sizing agent is 0.5% of the weight of a plate, the steam load rate is 4% in the range of 100-160 ℃, the spraying weight of the sizing agent is 2% of the weight of the plate, the temperature is above 160 ℃, the steam load rate is 5-10%, and the sizing agent is not sprayed, wherein the sizing agent consists of a component A and a component B, the weight ratio of the component A to the component B is 1, the component A consists of polyvinylpyrrolidone, cerium-zirconium solid solution and polyaniline in a weight ratio of 3;
(2) And (3) carrying out 7 staged cooling-heat preservation treatments on the intermediate plate, wherein the cooling rate of each stage is 0.3 ℃/min, the temperature is kept for 2h at 160 ℃ in the first stage, the temperature is kept for 2h at 140 ℃ in the second stage, the temperature is kept for 120 ℃ in the third stage, the temperature is kept for 2h in the fourth stage, the temperature is kept for 2h at 100 ℃ in the fourth stage, the temperature is kept for 2h in the fifth stage, the temperature is kept for 2h in the sixth stage, the temperature is kept for 40 ℃ in the seventh stage, and the temperature is kept for 2h to obtain the plate 1#.
Example 2
The present embodiment is different from embodiment 1 in that: the 9 stage heating-heat preservation processes are different, and specifically comprise: the first stage is 60 ℃, the temperature is kept for 2h, the second stage is 80 ℃, the temperature is kept for 2h, the third stage is 100 ℃, the temperature is kept for 2h, the fourth stage is 120 ℃, the temperature is kept for 2h, the fifth stage is 140 ℃, the temperature is kept for 2h, the sixth stage is 150 ℃, the temperature is kept for 1h, the seventh stage is 160 ℃, the temperature is kept for 1h, the eighth stage is 170 ℃, the temperature is kept for 1h, the ninth stage is 180 ℃, the temperature is kept for 1h, and the rest conditions are the same as those in the embodiment 1, so that a plate 2# is prepared.
Example 3
The present embodiment is different from embodiment 1 in that: 7 staged temperature reduction-heat preservation processes are different, and specifically comprise the following steps: the first stage is 165 ℃, the temperature is kept for 2h, the second stage is 150 ℃, the temperature is kept for 2h, the third stage is 135 ℃, the temperature is kept for 2h, the fourth stage is 120 ℃, the temperature is kept for 2h, the fifth stage is 95 ℃, the temperature is kept for 2h, the sixth stage is 70 ℃, the temperature is kept for 2h, the seventh stage is 45 ℃, the temperature is kept for 2h, and the rest conditions are the same as those in the example 1, so that the plate 3# is prepared.
Example 4
The present embodiment is different from embodiment 1 in that: in this example, a plate No. 4 was produced in the same manner as in example 1 except that no steam spraying was performed in step (1).
Example 5
The present embodiment is different from embodiment 1 in that: in this example, in the step (1), the setting agent is not sprayed, and the remaining conditions are the same as those in example 1, so that a plate 5# is obtained.
Example 6
The present embodiment is different from embodiment 1 in that: the setting agent only contains the component A, and the rest conditions are the same as those in the example 1, so that the plate 6# is prepared.
Example 7
The present embodiment is different from embodiment 1 in that: the setting agent only contains the component B, and the plate 7# is prepared under the same conditions as the example 1.
Example 8
The present embodiment is different from embodiment 1 in that: the sizing agent A consists of a cerium-zirconium solid solution and polyaniline in a weight ratio of 10.
Example 9
The present embodiment is different from embodiment 1 in that: the component B of the setting agent consists of oleic acid, pentaethylenehexamine and butanediol with the molar ratio of 1.5.
Comparative example 1
The difference between the comparative example and the example 1 is that the temperature rise process of the plate is different, specifically: placing the plate in a carbonization furnace, heating to 100 ℃ from 40 ℃, preserving heat for 7 hours, then heating to 160 ℃, preserving heat for 9 hours, finally heating to 180 ℃, preserving heat for 3 hours, and obtaining a comparative plate D1# by the same conditions as the embodiment 1.
Comparative example 2
The difference between the comparative example and the example 1 is that the cooling process of the plate is different, specifically that:
and (3) cooling the intermediate plate from 180 ℃ to 100 ℃, preserving the heat for 8 hours, then cooling to 40 ℃ again, preserving the heat for 6 hours, and obtaining a comparative plate D2# by the same conditions as the example 1.
The sheets No. 1-9 and comparative sheets No. 1-2 obtained in examples 1-9 and comparative examples 1-2 were subjected to deformation and cracking tests, and the initial thickness V of each sheet was measured 0 Placing the above plates in a constant temperature and humidity equipment with temperature of 25 deg.C or 50 deg.C and humidity of 50%, and measuring the thickness V of each plate after 30 days, 90 days and 180 days 30 、V 90 、V 180 Dimension Change Rate D after 30 days 30 I.e. (V) 30 -V 0 )/V 0 X 100%, similarly, the rate of change in size D after 90 days 90 That is (V) 90 -V 0 )/V 0 X 100%, dimensional Change Rate D after 180 days 180 That is (V) 180 -V 0 )/V 0 100 percent of x, and the test result of the dimensional change rate is shown in the following table 1, the crack of more than 1mm of the plate is not only cracked, the crack rate after 30 days is C30, the crack rate after 90 days is C90, the crack rate after 180 days is C180,the results of the crack rate measurements are shown in Table 2 below.
TABLE 1
TABLE 2
According to the test results in the tables 1 and 2, the 9 staged heating-heat preservation and 7 staged cooling-heat preservation preparation processes can carry out deep carbonization on the solid wood board, so that the wood fiber structure in the board is thoroughly recombined, the deformation and the cracking of the board are reduced, and in the 9 staged heating-heat preservation processes, the sprayed steam and the sizing agent can further size the solid wood board, further reduce the deformation and the cracking of the board, improve the temperature resistance of the board, and can be continuously used after being treated for 180 days at 50 ℃ and 50% of humidity.
The above description is only an example of the present application, and the protection scope of the present application is not limited by these specific examples, but is defined by the claims of the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the technical idea and principle of the present application should be included in the protection scope of the present application.
Claims (5)
1. A high-temperature setting method for solid wood boards is characterized by comprising the following steps:
(1) Placing the plate in a carbonization furnace, and continuously performing 9 step temperature rise-heat preservation from 40 ℃ to obtain an intermediate plate, wherein in the 9 step temperature rise-heat preservation: the temperature of the next stage is increased by 10-20 ℃ compared with the temperature of the previous stage, and the next stage is carried out after the temperature of each stage is raised and is kept for 1-3 hours;
(2) Carrying out 7 staged cooling-heat preservation treatments on the intermediate plate, wherein in the 7 staged cooling-heat preservation treatments, the temperature of the next stage is reduced by 15-25 ℃ compared with that of the previous stage, and after cooling at each stage, carrying out heat preservation for 1-3h and then carrying out the next stage;
still spray the calibrator in step (1), the calibrator comprises A component and B component, the weight ratio of A component and B component is 1: (5-20);
the component A comprises polyvinylpyrrolidone, a cerium-zirconium solid solution and polyaniline, wherein the weight ratio of the polyvinylpyrrolidone to the cerium-zirconium solid solution to the polyaniline in the component A is (0-3): (5-10): (1-2);
the component B consists of unsaturated fatty acid, pentaethylenehexamine and butanediol, wherein the molar ratio of the unsaturated fatty acid to the pentaethylenehexamine to the butanediol is 1.5:1: (10-20);
the spraying weight of the sizing agent is 0.5 percent of the weight of the plate at the temperature of below 100 ℃, the spraying weight of the sizing agent is 2 percent of the weight of the plate at the temperature of between 100 and 160 ℃, and the spraying is not carried out at the temperature of above 160 ℃.
2. The high-temperature setting method for the solid wood boards as claimed in claim 1, wherein in the step (1), the temperature rise rate of each stage is 0.2 ℃/min, and the final temperature of the 9 th stage is 180-210 ℃;
in the step (2), the cooling rate of each stage is 0.3-0.5 ℃/min.
3. The solid wood panel high-temperature setting method according to claim 2, wherein in the step (1), the heat preservation time of the 1 st to 4 th stages is 1h, and the heat preservation time of the 5 th to 9 th stages is 3h;
in the step (2), the heat preservation time of each stage is 2 hours.
4. The high-temperature solid wood panel setting method according to claim 1, wherein steam is further introduced in the step (1), and the steam load rate is 0 to 0.5% at a temperature of 100 ℃ or lower, 1 to 4.5% at a temperature of 100 to 160 ℃ or higher, and 5 to 10% at a temperature of 160 ℃ or higher.
5. The high-temperature setting method for solid wood panels as claimed in claim 1, wherein the unsaturated fatty acid is selected from one or more of myristic acid, oleic acid, linoleic acid and erucic acid.
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| DE202010011630U1 (en) * | 2010-08-20 | 2010-12-16 | Holzbau Schmid Gmbh & Co. Kg | Composite panel with over-veneered edge band |
| CN104441153A (en) * | 2014-10-30 | 2015-03-25 | 久盛地板有限公司 | High-temperature heat treatment process for substrate of solid wood floor |
| CN106808548B (en) * | 2015-11-30 | 2019-09-24 | 湖南桃花江竹材科技股份有限公司 | A kind of carbonization method of high-carbon anti-corrosion bamboo wood |
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