CN115488985B - Manufacturing method of eucalyptus bark formaldehyde-free artificial board - Google Patents
Manufacturing method of eucalyptus bark formaldehyde-free artificial board Download PDFInfo
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- CN115488985B CN115488985B CN202211150369.1A CN202211150369A CN115488985B CN 115488985 B CN115488985 B CN 115488985B CN 202211150369 A CN202211150369 A CN 202211150369A CN 115488985 B CN115488985 B CN 115488985B
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- eucalyptus bark
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- eucalyptus
- artificial board
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 244000166124 Eucalyptus globulus Species 0.000 title 1
- 241000219927 Eucalyptus Species 0.000 claims abstract description 132
- 239000002245 particle Substances 0.000 claims abstract description 75
- 239000003292 glue Substances 0.000 claims abstract description 57
- 238000005507 spraying Methods 0.000 claims abstract description 33
- 238000000034 method Methods 0.000 claims abstract description 18
- 239000002994 raw material Substances 0.000 claims abstract description 18
- 238000007731 hot pressing Methods 0.000 claims abstract description 17
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims abstract description 16
- 239000004495 emulsifiable concentrate Substances 0.000 claims abstract description 11
- 238000003756 stirring Methods 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- 238000010298 pulverizing process Methods 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 18
- 238000003825 pressing Methods 0.000 claims description 13
- 239000011259 mixed solution Substances 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 7
- 238000002156 mixing Methods 0.000 abstract description 6
- 239000000835 fiber Substances 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract 1
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 16
- 229910052742 iron Inorganic materials 0.000 description 8
- 239000004575 stone Substances 0.000 description 8
- 239000002023 wood Substances 0.000 description 8
- 238000000889 atomisation Methods 0.000 description 7
- 238000012545 processing Methods 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 5
- 238000001035 drying Methods 0.000 description 4
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 238000009966 trimming Methods 0.000 description 4
- 239000000839 emulsion Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 229920002678 cellulose Polymers 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 229920005610 lignin Polymers 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000011120 plywood Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L97/00—Compositions of lignin-containing materials
- C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse
-
- 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
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/002—Manufacture of substantially flat articles, e.g. boards, from particles or fibres characterised by the type of binder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/007—Manufacture of substantially flat articles, e.g. boards, from particles or fibres and at least partly composed of recycled 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
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/02—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from particles
-
- 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
-
- 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
Abstract
The invention discloses a manufacturing method of a eucalyptus bark formaldehyde-free artificial board, which comprises the following steps: and (3) crushing eucalyptus bark raw materials into particles to obtain eucalyptus bark particles, spraying MDI glue, zinc stearate and emulsifiable concentrate mixed liquor into the eucalyptus bark particles, wherein the weight of the MDI glue is 3.5-4% of that of the eucalyptus bark particles, the weight of the zinc stearate and emulsifiable concentrate mixed liquor is 4-7% of that of the eucalyptus bark particles, and paving, prepressing and hot-pressing the eucalyptus bark particles after glue spraying, stirring and mixing uniformly to obtain the artificial board. The invention provides a manufacturing method of a formaldehyde-free artificial board made of eucalyptus bark, which takes the eucalyptus bark as a raw material, utilizes the excellent fiber structure characteristic of the eucalyptus bark, combines specific technological processes such as glue spraying mixing, hot pressing technology and the like, and prepares the formaldehyde-free artificial board made of eucalyptus bark, simultaneously saves resources and protects the environment.
Description
Technical Field
The invention relates to the technical field of formaldehyde-free artificial boards, in particular to a manufacturing method of a eucalyptus bark formaldehyde-free artificial board.
Background
The eucalyptus is mainly used in the industries of paper making, artificial boards, solid wood furniture and the like. With the rapid development of various industries, the market demand for wood is continuously growing, and the barked wood of eucalyptus trunks is widely used as wood raw materials for manufacturing shaving boards, density boards and various plywood after being treated, but a large amount of eucalyptus bark remains are generated in the processing process. The traditional mode of processing eucalyptus bark is mainly to discard, burn or landfill in situ, which causes huge waste of resources and serious environmental pollution.
Disclosure of Invention
In view of the problems that the prior eucalyptus bark is mainly discarded, burned or buried in situ and the like, resources are wasted and the environment is seriously polluted, the invention provides a manufacturing method of the formaldehyde-free artificial board made of eucalyptus bark.
In order to achieve the above purpose, the embodiment of the present invention adopts the following technical scheme:
the manufacturing method of the eucalyptus bark formaldehyde-free artificial board comprises the following steps: crushing eucalyptus bark raw materials into particles to obtain eucalyptus bark particles; injecting MDI glue, zinc stearate and missible oil mixed solution into eucalyptus bark particles, wherein the weight of the MDI glue is 3.5-4% of that of the eucalyptus bark particles, the weight of the zinc stearate and missible oil mixed solution is 4-7% of that of the eucalyptus bark particles, and paving, prepressing and hot-pressing the eucalyptus bark particles after glue injection, stirring and mixing uniformly to obtain the artificial board.
The glue spraying process adopts MDI glue, so that formaldehyde is not only added, but also the MDI glue has strong polarity and activity, and can react with cellulose, lignin and moisture in eucalyptus bark, so that the artificial board prepared by using the MDI glue has high strength and good water resistance. Meanwhile, the added zinc stearate and emulsifiable concentrate mixed solution also do not contain formaldehyde, so that the manufactured artificial board does not have the problem that formaldehyde is released to harm human health.
According to one aspect of the invention, the water content of the raw materials is controlled to be 20-25% before the eucalyptus bark is crushed.
According to one aspect of the invention, the eucalyptus bark particles have a size of 0.5-5mm.
According to one aspect of the present invention, the crushing includes coarse crushing and fine crushing, wherein the coarse crushing is to crush eucalyptus bark to a length of 27-33mm, and the coarsely crushed eucalyptus bark is dried, decontaminated and finely crushed to a size of 0.5-5mm.
According to one aspect of the invention, the coarsely crushed eucalyptus bark is dried to a moisture content of between 13 and 15%.
The water content of the raw material eucalyptus bark is controlled before crushing, coarse crushing and fine crushing are carried out, the water content of the raw material eucalyptus bark is strictly controlled, proper fineness is obtained by fully crushing, the joint area of the eucalyptus bark and MDI glue, zinc stearate and emulsifiable concentrate mixed solution is fully increased, and the atomization glue spraying process capable of reducing the glue application amount is combined, so that the preparation of the low-density artificial board is facilitated.
According to one aspect of the invention, the section of the paved blank is in a three-layer form of large middle particles and small outer particles.
In accordance with one aspect of the invention, the density deviation of the preform is required to be less than 8%.
According to one aspect of the invention, the pre-compression face pressure of the pre-compression is 0.3Mpa.
According to one aspect of the invention, the hot pressing temperature is 180 ℃ and the surface pressure is 2-4Mpa.
By precisely controlling parameters such as density deviation, temperature, surface pressure and the like in paving, prepressing and hot pressing processes, the product performance can be more stable, and the product is not easy to deform.
According to one aspect of the invention, the hot-pressed product further comprises post-treatment, wherein the post-treatment comprises edge cutting, cooling, health preserving and sanding.
The implementation of the invention has the advantages that: the invention provides a preparation method for preparing an artificial board from eucalyptus bark without formaldehyde, which takes eucalyptus bark produced in eucalyptus wood processing as a raw material, utilizes excellent fiber structure characteristics of the eucalyptus bark, combines specific technological processes of raw material preparation, glue spraying mixing, hot pressing and the like, can reduce the glue application amount, and realizes the mass production of the artificial board without formaldehyde from the eucalyptus bark. The invention utilizes eucalyptus bark waste generated in eucalyptus wood processing, saves resources and protects the environment.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a method for manufacturing a formaldehyde-free artificial board made of eucalyptus bark.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, the method for manufacturing the eucalyptus bark formaldehyde-free artificial board comprises the following steps: and (3) crushing eucalyptus bark raw materials into particles to obtain eucalyptus bark particles, spraying MDI glue, zinc stearate and emulsifiable concentrate mixed liquor into the eucalyptus bark particles, wherein the weight of the MDI glue is 3.5% -4% of that of the eucalyptus bark particles, the weight of the zinc stearate and emulsifiable concentrate mixed liquor is 4% -7% of that of the eucalyptus bark particles, and paving, prepressing and hot-pressing the eucalyptus bark particles after glue spraying, stirring and mixing uniformly to obtain the artificial board. Specifically, the intelligent glue spraying device can be used for spraying glue, the glue spraying amount is controlled according to the corresponding weight, and meanwhile, particles smaller than 5 mu m are sprayed into the stirrer through the atomizing nozzle to be fully stirred, so that intelligent control is realized. The atomization glue spraying is adopted, the control of the atomization strength of the glue spraying is combined, the glue is uniformly applied, the contact area between glue drops and the surface of raw materials is increased, the physical and mechanical properties of the artificial board can be improved, and the quality of the artificial board is reliably ensured. The intelligent glue spraying device can be controlled by software, such as the control software (V1.0) of the sea health Bayer system, and copyright registration numbers: 2019SR0861188.
The glue spraying process adopts MDI glue, so that formaldehyde is not only added, but also the MDI glue has strong polarity and activity, and can react with cellulose, lignin and moisture in eucalyptus bark, so that the artificial board prepared by using the MDI glue has high strength and good water resistance. Meanwhile, the added zinc stearate and emulsifiable concentrate mixed solution also do not contain formaldehyde, so that the manufactured artificial board does not have the problem that formaldehyde is released to harm human health.
Preferably, the water content of the raw materials is controlled to be 20% -25% before the eucalyptus bark is crushed. The eucalyptus bark has a particle size of 0.5-5mm. Further, the crushing comprises coarse crushing and fine crushing, wherein the coarse crushing is to crush eucalyptus bark to a length of 27-33mm, and the coarsely crushed eucalyptus bark is dried, decontaminated and finely crushed to a size of 0.5-5mm. Specifically, the coarsely crushed eucalyptus bark is dried until the water content is between 13 and 15 percent.
The water content of the raw material eucalyptus bark is controlled before crushing, coarse crushing and fine crushing are carried out, the water content of the raw material eucalyptus bark is strictly controlled, proper fineness is obtained by fully crushing, and the joint area of the eucalyptus bark, MDI glue and zinc stearate and emulsifiable concentrate mixed solution is fully increased.
Preferably, the section of the paved material blank is three layers of large middle particles and small outer side particles. The density deviation of the preform is required to be less than 8%.
Preferably, the pre-pressing surface pressure of the pre-pressing is 0.3Mpa. The hot pressing temperature is 180 ℃ and the surface pressure is 2-4Mpa. The hot pressing process further comprises post-treatment, wherein the post-treatment comprises edge cutting, cooling, health preserving and sanding.
The following are specific examples.
Example 1
Naturally drying the collected eucalyptus bark until the water content is within the range of 20% -25%, and then crushing. The pulverization is classified into coarse pulverization and fine pulverization, and the coarse pulverization is to pulverize eucalyptus bark to a length of 30mm by a blade pulverizer. The coarsely crushed eucalyptus bark is dried by a roller dryer, so that the water content of the coarsely crushed eucalyptus bark is controlled to be 14%. And removing iron and stone in the dried eucalyptus bark particles by an iron removing machine and a stone removing machine, and then crushing the eucalyptus bark particles into 0.5-5mm by a hammer crusher. At this time, eucalyptus bark particles are conveyed to a storage bin to wait for entering the next plate making working section.
The eucalyptus bark particles in the bin are weighed before glue spraying, the water content of the eucalyptus bark particles is monitored by a water content tester, after the particles are sent into the stirrer, glue spraying is carried out by adopting a glue spraying device, the glue spraying amount is controlled according to the corresponding weight, and MDI glue with the weight of 3.5% of the weight of the particles, zinc stearate with the weight of 4% and the emulsion oil mixed solution are sprayed into the stirrer through an atomization nozzle to be fully stirred in the process of continuously stirring.
And (5) directly feeding the stirred eucalyptus bark particles into a paving machine for grading paving. The section of the material blank paved by the grading paving machine presents three layers of forms of middle large particles and outer small particles, and the density deviation of the material blank is required to be less than 8%.
The paved material blank is continuously pre-pressed by a roller-type pre-pressing machine, and the pre-pressing surface pressure is about 0.3Mpa, so that the material blank reaches a certain technological thickness and a relatively stable state.
The pre-pressed blank is cut off by a cross-cutting machine and then is conveyed to a hot press, hot pressed at 180 ℃ and under the face pressure of 2.5Mpa, and the blank is solidified into a blank plate after 460 seconds of hot pressing time.
Sawing the formed blank to a required size by a trimming machine, cooling, and preserving for more than 48 hours under normal temperature and normal humidity conditions. Finally, sand is carried out by a sander until the required thickness is reached, and the finished product eucalyptus bark formaldehyde-free artificial board is obtained.
Example 2
Naturally drying the collected eucalyptus bark until the water content is within the range of 20% -25%, and then crushing. The pulverization is classified into coarse pulverization and fine pulverization, and the coarse pulverization is to pulverize eucalyptus bark to a length of 30mm by a blade pulverizer. The coarsely crushed eucalyptus bark is dried by a roller dryer, so that the water content of the coarsely crushed eucalyptus bark is controlled to be 14%. And removing iron and stone in the dried eucalyptus bark particles by an iron removing machine and a stone removing machine, and then crushing the eucalyptus bark particles into 0.5-5mm by a hammer crusher. At this time, eucalyptus bark particles are conveyed to a storage bin to wait for entering the next plate making working section.
The eucalyptus bark particles in the bin are weighed before glue spraying, the water content of the eucalyptus bark particles is monitored by a water content tester, after the particles are sent into the stirrer, glue spraying is carried out by adopting a glue spraying device, the glue spraying amount is controlled according to the corresponding weight, and MDI glue with the weight of 3.5% of the weight of the particles, zinc stearate with the weight of 4% and the emulsion oil mixed solution are sprayed into the stirrer through an atomization nozzle to be fully stirred in the process of continuously stirring.
And (5) directly feeding the stirred eucalyptus bark particles into a paving machine for grading paving. The section of the material blank paved by the grading paving machine presents three layers of forms of middle large particles and outer small particles, and the density deviation of the material blank is required to be less than 8%.
The paved material blank is continuously pre-pressed by a roller-type pre-pressing machine, and the pre-pressing surface pressure is about 0.3Mpa, so that the material blank reaches a certain technological thickness and a relatively stable state.
The pre-pressed blank is cut off by a cross-cutting machine and then is conveyed to a hot press, hot pressed at 180 ℃ and under the surface pressure of 3.8Mpa, and the blank is solidified into a blank plate after the hot pressing time of 360 seconds.
Sawing the formed blank to a required size by a trimming machine, cooling, and preserving for more than 48 hours under normal temperature and normal humidity conditions. Finally, sand is carried out by a sander until the required thickness is reached, and the finished product eucalyptus bark formaldehyde-free artificial board is obtained.
Example 3
Naturally drying the collected eucalyptus bark until the water content is within the range of 20% -25%, and then crushing. The pulverization is classified into coarse pulverization and fine pulverization, and the coarse pulverization is to pulverize eucalyptus bark to a length of 30mm by a blade pulverizer. The coarsely crushed eucalyptus bark is dried by a roller dryer, so that the water content of the coarsely crushed eucalyptus bark is controlled to be 14%. And removing iron and stone in the dried eucalyptus bark particles by an iron removing machine and a stone removing machine, and then crushing the eucalyptus bark particles into 0.5-5mm by a hammer crusher. At this time, eucalyptus bark particles are conveyed to a storage bin to wait for entering the next plate making working section.
The eucalyptus bark particles in the bin are weighed before glue spraying, the water content of the eucalyptus bark particles is monitored by a water content tester, after the particles are sent into the stirrer, glue spraying is carried out by adopting a glue spraying device, the glue spraying amount is controlled according to the corresponding weight, and MDI glue with the weight of 3.5% of the weight of the particles, zinc stearate with the weight of 4% and the emulsion oil mixed solution are sprayed into the stirrer through an atomization nozzle to be fully stirred in the process of continuously stirring.
And (5) directly feeding the stirred eucalyptus bark particles into a paving machine for grading paving. The section of the material blank paved by the grading paving machine presents three layers of forms of middle large particles and outer small particles, and the density deviation of the material blank is required to be less than 8%.
The paved material blank is continuously pre-pressed by a roller-type pre-pressing machine, and the pre-pressing surface pressure is about 0.3Mpa, so that the material blank reaches a certain technological thickness and a relatively stable state.
The pre-pressed blank is cut off by a cross-cutting machine and then is conveyed to a hot press, hot-pressed at 180 ℃ and under the surface pressure of 4Mpa, and the blank is solidified into a blank plate after 650 seconds of hot-pressing time.
Sawing the formed blank to a required size by a trimming machine, cooling, and preserving for more than 48 hours under normal temperature and normal humidity conditions. Finally, sand is carried out by a sander until the required thickness is reached, and the finished product eucalyptus bark formaldehyde-free artificial board is obtained.
Example 4
Naturally drying the collected eucalyptus bark until the water content is within the range of 20% -25%, and then crushing. The pulverization is classified into coarse pulverization and fine pulverization, and the coarse pulverization is to pulverize eucalyptus bark to a length of 30mm by a blade pulverizer. The coarsely crushed eucalyptus bark is dried by a roller dryer, so that the water content of the coarsely crushed eucalyptus bark is controlled to be 14%. And removing iron and stone in the dried eucalyptus bark particles by an iron removing machine and a stone removing machine, and then crushing the eucalyptus bark particles into 0.5-5mm by a hammer crusher. At this time, eucalyptus bark particles are conveyed to a storage bin to wait for entering the next plate making working section.
The eucalyptus bark particles in the bin are weighed before glue spraying, the water content of the eucalyptus bark particles is monitored by a water content tester, after the particles are sent into the stirrer, glue spraying is carried out by adopting a glue spraying device, the glue spraying amount is controlled according to the corresponding weight, and in the continuous stirring process, 4% of MDI glue, 7% of zinc stearate and emulsifiable concentrate mixed solution by weight of the particles are sprayed into the stirrer through an atomization nozzle to be fully stirred by particles smaller than 5 mu m.
And (5) directly feeding the stirred eucalyptus bark particles into a paving machine for grading paving. The section of the material blank paved by the grading paving machine presents three layers of forms of middle large particles and outer small particles, and the density deviation of the material blank is required to be less than 8%.
The paved material blank is continuously pre-pressed by a roller-type pre-pressing machine, and the pre-pressing surface pressure is about 0.3Mpa, so that the material blank reaches a certain technological thickness and a relatively stable state.
The pre-pressed blank is cut off by a cross-cutting machine and then is conveyed to a hot press, hot pressed at 180 ℃ and under the face pressure of 2.5Mpa, and the blank is solidified into a blank plate after 460 seconds of hot pressing time.
Sawing the formed blank to a required size by a trimming machine, cooling, and preserving for more than 48 hours under normal temperature and normal humidity conditions. Finally, sand is carried out by a sander until the required thickness is reached, and the finished product eucalyptus bark formaldehyde-free artificial board is obtained.
The physical and chemical properties of the finished eucalyptus bark formaldehyde-free artificial boards prepared in example 1, example 2, example 3 and example 4 were tested (test method is according to GB/T4897-2015), and the test results are shown in the following Table 1:
TABLE 1 Performance test results
As shown by the detection results, the artificial boards prepared from eucalyptus bark, which are obtained in the examples 1-4, have formaldehyde-free performance, are safe and environment-friendly, and meanwhile, the boards are high in strength and good in water resistance. Through reasonable setting of parameters in the hot pressing process, the manufacturing of the low-density and medium-density eucalyptus bark formaldehyde-free artificial board can be realized.
The implementation of the invention has the advantages that: the invention provides a preparation method for preparing an artificial board from eucalyptus bark without formaldehyde, which takes eucalyptus bark produced in eucalyptus wood processing as a raw material, utilizes excellent fiber structure characteristics of the eucalyptus bark, combines specific technological processes of raw material preparation, glue spraying mixing, hot pressing and the like, can reduce the glue application amount, and realizes the mass production of the artificial board without formaldehyde from the eucalyptus bark. The invention utilizes eucalyptus bark waste generated in eucalyptus wood processing, saves resources and protects the environment.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the technical scope of the present invention should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. The manufacturing method of the eucalyptus bark formaldehyde-free artificial board is characterized by comprising the following steps of: the eucalyptus bark raw material is crushed into particles to obtain eucalyptus bark particles, the eucalyptus bark particles are 0.5-5mm in size, MDI glue, zinc stearate and emulsifiable concentrate mixed solution are sprayed into the eucalyptus bark particles, the weight of the MDI glue is 3.5-4% of the weight of the eucalyptus bark particles, the weight of the zinc stearate and emulsifiable concentrate mixed solution is 4-7% of the weight of the eucalyptus bark particles, the eucalyptus bark particles are uniformly mixed by glue spraying and stirring, an artificial board is manufactured after paving, prepressing and hot pressing, the cross section of a paved material blank is in a three-layer form of middle large particles and outer small particles.
2. The method for manufacturing the eucalyptus bark formaldehyde-free artificial board according to claim 1, wherein the water content of the raw materials is controlled to be 20% -25% before the eucalyptus bark is crushed.
3. The method for producing a formaldehyde-free artificial board made of eucalyptus bark according to claim 1, wherein the pulverization includes coarse pulverization and fine pulverization, wherein the coarse pulverization is to pulverize eucalyptus bark to a length of 27-33mm, and the coarsely pulverized eucalyptus bark is dried, purified and finely pulverized to a size of 0.5-5mm.
4. The method for producing a formaldehyde-free artificial board made of eucalyptus bark according to claim 3, wherein the coarsely pulverized eucalyptus bark is dried to a water content of 13 to 15%.
5. The method for producing a formaldehyde-free artificial board made of eucalyptus bark as claimed in claim 4, wherein the density deviation of the preform is required to be less than 8%.
6. The method for producing a formaldehyde-free artificial board made of eucalyptus bark according to any one of claims 1 to 5, wherein the pre-pressing surface pressure of the pre-pressing is 0.3Mpa.
7. The method for producing a formaldehyde-free artificial board made of eucalyptus bark according to claim 6, wherein the hot pressing temperature is 180 ℃ and the surface pressure is 2-4Mpa.
8. The method for manufacturing a eucalyptus bark formaldehyde-free artificial board according to claim 7, wherein the post-heat pressing further comprises post-treatment, and the post-treatment comprises edge cutting, cooling, health preserving and sanding.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101439533A (en) * | 2007-11-23 | 2009-05-27 | 黑龙江省林产工业研究所 | Method for preparing composite floor core material using bark of dahurian larch as raw material |
| CN103250620A (en) * | 2013-05-15 | 2013-08-21 | 赤水市华宝石斛产业有限公司 | Dendrobium nobile standardized facility cultivating method |
| CN103450433A (en) * | 2013-07-25 | 2013-12-18 | 桐城市福润包装材料有限公司 | Polyurethane foam composite material with flame retardant property |
| CN103468157A (en) * | 2013-09-04 | 2013-12-25 | 杨学荣 | Formaldehyde-free wood adhesive film |
| CN104708699A (en) * | 2015-02-05 | 2015-06-17 | 安徽忠盛新型装饰材料有限公司 | Worm-expelling mold-proof and environmentally-friendly composite board and preparation method thereof |
| CN107106430A (en) * | 2014-10-29 | 2017-08-29 | 昭和电工株式会社 | Mitochondrial function improver and aging prevent from using composition |
| CN107751202A (en) * | 2016-08-16 | 2018-03-06 | 江苏龙灯化学有限公司 | A kind of Pesticidal combination |
-
2022
- 2022-09-21 CN CN202211150369.1A patent/CN115488985B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101439533A (en) * | 2007-11-23 | 2009-05-27 | 黑龙江省林产工业研究所 | Method for preparing composite floor core material using bark of dahurian larch as raw material |
| CN103250620A (en) * | 2013-05-15 | 2013-08-21 | 赤水市华宝石斛产业有限公司 | Dendrobium nobile standardized facility cultivating method |
| CN103450433A (en) * | 2013-07-25 | 2013-12-18 | 桐城市福润包装材料有限公司 | Polyurethane foam composite material with flame retardant property |
| CN103468157A (en) * | 2013-09-04 | 2013-12-25 | 杨学荣 | Formaldehyde-free wood adhesive film |
| CN107106430A (en) * | 2014-10-29 | 2017-08-29 | 昭和电工株式会社 | Mitochondrial function improver and aging prevent from using composition |
| CN104708699A (en) * | 2015-02-05 | 2015-06-17 | 安徽忠盛新型装饰材料有限公司 | Worm-expelling mold-proof and environmentally-friendly composite board and preparation method thereof |
| CN107751202A (en) * | 2016-08-16 | 2018-03-06 | 江苏龙灯化学有限公司 | A kind of Pesticidal combination |
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