CN112497392A - Treatment method for eliminating blueing of rubber wood - Google Patents

Treatment method for eliminating blueing of rubber wood Download PDF

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Publication number
CN112497392A
CN112497392A CN202011523868.1A CN202011523868A CN112497392A CN 112497392 A CN112497392 A CN 112497392A CN 202011523868 A CN202011523868 A CN 202011523868A CN 112497392 A CN112497392 A CN 112497392A
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Prior art keywords
rubber wood
blue
wood
rubber
eliminating
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CN202011523868.1A
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余秀芳
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Fuyang Wending Crafts Co ltd
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Fuyang Wending Crafts Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/02—Processes; Apparatus
    • B27K3/08—Impregnating by pressure, e.g. vacuum impregnation
    • B27K3/10—Apparatus
    • 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
    • B27K3/16—Inorganic impregnating agents
    • B27K3/32—Mixtures of different inorganic impregnating agents
    • 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
    • B27K5/003—Treating of wood not provided for in groups B27K1/00, B27K3/00 by using electromagnetic radiation or mechanical waves
    • B27K5/0055—Radio-waves, e.g. microwaves
    • 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
    • B27K2240/00—Purpose of the treatment
    • B27K2240/20—Removing fungi, molds or insects

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)

Abstract

The invention relates to the technical field of wood treatment, and discloses a treatment method for eliminating blue stain of rubber wood, which is characterized in that the blue-stained rubber wood is subjected to physical and chemical treatment methods, so that blue-stained bacteria and other auxiliary bacteria on the surface and the inside can be effectively removed deeply, and blue-stained spots can be well eliminated; the treatment method adopted by the invention is simple, can effectively remove blue-discoloration stains in the rubber wood subjected to blue-discoloration, stabilizes the original color and luster of the rubber wood, keeps the original quality of the rubber wood for a long time, solves the problem of quality reduction caused by poor prevention and treatment effect of the rubber wood due to high blue-discoloration infection speed, has good effect of eliminating the stains of the rubber wood subjected to blue-discoloration, has low treatment cost, and can be popularized and used in production. Economic loss and processing cost brought to rubber wood processing enterprises by blue change are reduced.

Description

Treatment method for eliminating blueing of rubber wood
Technical Field
The invention belongs to the technical field of wood treatment, and particularly relates to a treatment method for eliminating blue stain of rubber wood.
Background
The rubber wood is a plant for producing rubber latex, is a trunk of a rubber tree and is a subtropical tree species. The trunk of the tree can be used for manufacturing furniture after the tree ages. With the development of furniture market, rubber wood is more and more widely used for furniture, floors, wood core boards and the like. The rubber wood has the advantages of light and elegant color, beautiful texture, reduced dryness, light to medium density and good machining and finishing performance, but is easy to mildew, damage by worms and decay because the rubber wood contains about 8 percent of free sugar and starch (the content of the common wood is only 1 to 3 percent).
After the trees are felled, the whole trees are directly placed on moist soil without timely and effective health preservation treatment, and the internal environment of the wood can be chemically changed and the wood is light blue by blowing wind, rain and microorganism invasion. The blue stain is a phenomenon that the content of water content, carbohydrate (starch, monosaccharide) and the like in the wood is excessive, so that the cacao conidiophores are massively propagated in the tracheids or ducts of the wood, discoloring bacteria invade the interior of the wood, and hypha of blue stain fungi secrete a coloring matter to dye the cell walls, so that the blue stain of the wood is promoted.
The rubber wood is extremely easy to be invaded by the blue-changing bacteria, although the slight blue-changing can not cause the loss of the structural strength of the wood, the quality and the price of the blue-changed rubber wood are greatly reduced, and the sales volume and the sales price of the rubber wood are seriously influenced. At present, the phenomena of blue stain and mildew of rubber wood are basically prevented, but no good method for eliminating the blue stain is available for the rubber wood with the blue stain.
Disclosure of Invention
The invention aims to provide a treatment method for eliminating blue stain of rubber wood aiming at the existing problems.
The invention is realized by the following technical scheme:
a treatment method for eliminating blueing of rubber wood comprises the following process steps:
s1, placing the blue-changed rubber wood in the sun for 2-3 days, uniformly spraying a prepared primary sterilizing agent on the surface, wherein the dosage of the primary sterilizing agent is 43-48 g/square meter, and soaking and moistening the surface at 26-28 ℃ for 8-10 hours, and the primary scavenging agent is prepared by mixing 0.8-0.9% of lime water and 1.3-1.5% of sodium chloride solution according to the mass ratio of 4-6: 1.6-2.0;
s2: washing the rubber wood processed in the step S1 with clear water, putting the washed rubber wood into a heat treatment box, adding a zinc chloride aqueous solution with the concentration of 1.4-1.8 g/l, the volume ratio of the feed liquid is 1:1.3-1.4, soaking the rubber wood for 4-5 hours at 55-60 ℃, adding a carbonized adsorbent accounting for 2.0-2.3% of the mass of the zinc chloride aqueous solution, heating the mixture to 160-180 ℃ by using water vapor, carrying out heating treatment for 25-30 minutes, cooling the mixture to 60-70 ℃, taking out the rubber wood, and carrying out irradiation treatment for 2-3 minutes by using an ultraviolet lamp;
the preparation method of the carbonized adsorbent comprises the following steps: cutting corn straws into pieces with the length of 1-3 mm, adding the pieces into a sodium carbonate aqueous solution with the mass concentration of 4.5-5.5%, soaking for 3-4 hours at the temperature of 30-35 ℃, and soaking the pieces in a liquor mass ratio of 1: 1.8 to 2.0, fishing out the straws after the soaking, extruding out excessive water, placing the straws in a carbonization furnace, heating to 410 and 420 ℃, preserving heat and carbonizing for 2 to 3 hours, continuously heating to 540 and 550 ℃, preserving heat for 20 to 30 minutes, and naturally cooling to room temperature.
S3: washing the rubber wood after irradiation treatment with clean water, wiping the surface moisture with a clean rag, placing the cleaned rubber wood in a vacuum pressure impregnation tank, vacuumizing the vacuum degree to be-0.09 MPa, keeping the vacuum degree for 10-15 minutes, adding an impregnant, completely immersing the rubber wood, keeping the vacuum degree at-0.12 MPa for 15-20 minutes, pressurizing the mixture to 0.45-0.55MPa, keeping the pressure for 50-60 minutes, releasing the pressure, the impregnant, taking out the impregnated rubber wood, and placing the impregnated rubber wood in an oven with the temperature of 100 ℃ and 110 ℃ for drying for 16-20 hours.
Further, the impregnant is obtained by ultrasonically mixing aqueous polyurethane with the solid content of 41-44% and silver nitrate aqueous solution with the mass concentration of 1.4-1.8% according to the mass ratio of 170-180: 1.
Compared with the prior art, the invention has the following advantages: aiming at the problems that the rubber wood is easy to have blue stain and is difficult to eliminate after the blue stain, the invention provides a treatment method for eliminating the blue stain of the rubber wood, the rubber wood which has been subjected to the blue stain is subjected to physical and chemical treatment methods, so that blue stain bacteria and other accessory bacteria on the surface and the inner side can be effectively removed deeply, and blue stain spots are eliminated well; the treatment method adopted by the invention is simple, can effectively remove blue-discoloration stains in the rubber wood subjected to blue-discoloration, stabilizes the original color and luster of the rubber wood, keeps the original quality of the rubber wood for a long time, solves the problem of quality reduction caused by poor prevention and treatment effect of the rubber wood due to high blue-discoloration infection speed, has good effect of eliminating the stains of the rubber wood subjected to blue-discoloration, has low treatment cost, and can be popularized and used in production. Economic loss and processing cost brought to rubber wood processing enterprises by blue change are reduced. Promoting economic promotion and effective utilization of resources. The invention effectively avoids the secondary blue-turning, effectively solves the blue-turning defect of the rubber wood, has important significance for maintaining the quality value of the wood, and can widen the application of the rubber wood in the fields of artware, furniture and the like with strict requirements on the appearance of the wood.
Detailed Description
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described with reference to specific embodiments, and it should be understood that the specific embodiments described herein are only used for explaining the present invention and are not used for limiting the technical solutions provided by the present invention.
Example 1
A treatment method for eliminating blueing of rubber wood comprises the following process steps:
s1, placing the blue-changed rubber wood in the sun for 2 days, then uniformly spraying a prepared primary sterilizing agent on the surface, wherein the dosage of the primary sterilizing agent is 43 g/square meter, and soaking and treating the surface at 26 ℃ for 8 hours, wherein the primary removing agent is obtained by mixing lime water with the mass concentration of 0.8% and sodium chloride solution with the mass concentration of 1.3% according to the mass ratio of 4: 1.6;
s2: washing the rubber wood processed in the step S1 with clear water, putting the rubber wood into a heat treatment box, adding a zinc chloride aqueous solution with the concentration of 1.4 g/L, the volume ratio of the feed liquid being 1:1.3, soaking the rubber wood at 55 ℃ for 4 hours, adding a carbonized adsorbent accounting for 2.0 percent of the mass of the zinc chloride aqueous solution, heating the mixture to 160 ℃ by using water vapor, carrying out heating treatment for 25 minutes, cooling the mixture to 60 ℃, taking out the rubber wood, and carrying out irradiation treatment for 2 minutes by using an ultraviolet lamp;
the preparation method of the carbonized adsorbent comprises the following steps: cutting corn straws into pieces with the length of 1-3 mm, adding the pieces into a sodium carbonate aqueous solution with the mass concentration of 4.5%, soaking for 3 hours at the temperature of 30 ℃, and soaking the pieces in the soaking solution according to the mass ratio of 1: 1.8, fishing out the straws after soaking, extruding excessive water, placing in a carbonization furnace, heating to 410 ℃, preserving heat and carbonizing for 2 hours, continuing heating to 540 ℃, preserving heat for 20 minutes, and naturally cooling to room temperature.
S3: washing the irradiated rubber wood with clear water, wiping off surface water with a clean rag, placing the cleaned rubber wood in a vacuum pressure impregnation tank, vacuumizing to-0.09 MPa, keeping the vacuum pressure for 10 minutes, adding an impregnant, completely immersing the rubber wood, keeping the vacuum pressure for 15 minutes at-0.12 MPa, pressurizing to 0.45 MPa, keeping the vacuum pressure for 50 minutes, releasing the pressure, impregnating the impregnant, taking out the impregnated rubber wood, and placing the impregnated rubber wood in an oven at 100 ℃ for drying for 16 hours.
Further, the impregnant is obtained by ultrasonically mixing aqueous polyurethane with the solid content of 41% and silver nitrate aqueous solution with the mass concentration of 1.4% according to the mass ratio of 170: 1.
Example 2
A treatment method for eliminating blueing of rubber wood comprises the following process steps:
s1, placing the blue-changed rubber wood in the sun for 2 days, uniformly spraying a prepared primary sterilizing agent on the surface, wherein the dosage of the primary sterilizing agent is 45 g/square meter, and soaking and treating the surface at 27 ℃ for 9 hours, wherein the primary removing agent is obtained by mixing 0.85% of lime water and 1.4% of sodium chloride solution according to the mass ratio of 5: 1.8;
s2: washing the rubber wood processed in the step S1 with clear water, putting the washed rubber wood into a heat treatment box, adding a zinc chloride aqueous solution with the concentration of 1.6 g/L, the volume ratio of the feed liquid being 1:1.35, soaking the rubber wood at 58 ℃ for 4.5 hours, adding a carbonization adsorbent accounting for 2.1 percent of the mass of the zinc chloride aqueous solution, heating the mixture to 170 ℃ by using water vapor, heating the mixture for 28 minutes, cooling the mixture to 65 ℃, taking out the rubber wood, and irradiating the rubber wood for 2.5 minutes by using an ultraviolet lamp;
the preparation method of the carbonized adsorbent comprises the following steps: cutting corn straws into pieces with the length of 1-3 mm, adding the pieces into a sodium carbonate aqueous solution with the mass concentration of 5.0%, soaking for 3.5 hours at the temperature of 33 ℃, and soaking the pieces in a liquor mass ratio of 1: 1.9, fishing out the straws after soaking, extruding excessive water, placing in a carbonization furnace, heating to 415 ℃, preserving heat, carbonizing for 2.5 hours, continuously heating to 545 ℃, preserving heat for 25 minutes, and naturally cooling to room temperature.
S3: washing the irradiated rubber wood with clear water, wiping off surface water with a clean rag, placing the cleaned rubber wood in a vacuum pressure impregnation tank, vacuumizing the vacuum degree of-0.09 MPa, keeping the vacuum degree for 12 minutes, adding an impregnant, completely immersing the rubber wood, keeping the vacuum degree of-0.12 MPa for 18 minutes, pressurizing the mixture to 0.50MPa, keeping the pressure for 55 minutes, releasing the pressure, taking out the impregnated rubber wood, and placing the impregnated rubber wood in an oven at 105 ℃ for drying for 18 hours.
Further, the impregnating agent is obtained by ultrasonically mixing water-based polyurethane with the solid content of 42% and silver nitrate aqueous solution with the mass concentration of 1.6% according to the mass ratio of 175: 1.
Example 3
A treatment method for eliminating blueing of rubber wood comprises the following process steps:
s1, placing the blue-changed rubber wood in the sun for 3 days, uniformly spraying a prepared primary sterilizing agent on the surface, wherein the dosage of the primary sterilizing agent is 48 g/square meter, and soaking and treating the surface at 28 ℃ for 10 hours, wherein the primary scavenging agent is obtained by mixing lime water with the mass concentration of 0.9% and sodium chloride solution with the mass concentration of 1.5% according to the mass ratio of 6: 2.0;
s2: washing the rubber wood processed in the step S1 with clear water, putting the rubber wood into a heat treatment box, adding a zinc chloride aqueous solution with the concentration of 1.8 g/L, the volume ratio of the feed liquid being 1:1.4, soaking the rubber wood at 60 ℃ for 5 hours, adding a carbonized adsorbent accounting for 2.3% of the mass of the zinc chloride aqueous solution, heating the mixture to 180 ℃ by using water vapor, carrying out heating treatment for 30 minutes, cooling the mixture to 70 ℃, taking out the rubber wood, and carrying out irradiation treatment for 3 minutes by using an ultraviolet lamp;
the preparation method of the carbonized adsorbent comprises the following steps: cutting corn straws into pieces with the length of 1-3 mm, adding the pieces into a sodium carbonate aqueous solution with the mass concentration of 5.5%, soaking for 4 hours at the temperature of 35 ℃, and soaking the pieces in a soaking liquid mass ratio of 1: 2.0, fishing out the straws after soaking, extruding excessive water, placing in a carbonization furnace, heating to 420 ℃, preserving heat, carbonizing for 3 hours, continuously heating to 550 ℃, preserving heat for 30 minutes, and naturally cooling to room temperature.
S3: washing the irradiated rubber wood with clear water, wiping off surface water with a clean rag, placing the cleaned rubber wood in a vacuum pressure impregnation tank, vacuumizing the vacuum degree to be-0.09 MPa, keeping the vacuum degree for 15 minutes, adding an impregnant, completely immersing the rubber wood, keeping the vacuum degree at-0.12 MPa for 20 minutes, pressurizing the mixture to 0.55MPa, keeping the pressure for 60 minutes, releasing the pressure, taking out the impregnated rubber wood, and placing the impregnated rubber wood in an oven at 110 ℃ for drying for 20 hours.
Further, the impregnating agent is obtained by ultrasonically mixing aqueous polyurethane with a solid content of 44% and silver nitrate aqueous solution with a mass concentration of 1.8% according to a mass ratio of 180: 1.
Comparative example 1
The difference from embodiment 1 is that step S1 is omitted and the rest is kept the same.
Comparative example 2
The difference from embodiment 2 is that step S2 is omitted and the rest is kept the same.
Comparative example 3
The difference from embodiment 3 is that step S3 is omitted and the rest is kept the same.
Comparative experiment
Taking local 10-year-old rubber wood as a processing object, sawing into cylindrical experimental samples with the thickness of 25 mm, setting 5 samples in each group, setting a blank control group at the same time, carrying out blue-stain infection, carrying out the experiment in summer, wherein the experimental time is 10 weeks, the infected value after infection is 3, the surface infection area of the sample is 5/8, the internal blue-stain area is 1/15, respectively carrying out processing treatment according to the methods of examples 1-3 and comparative examples 1-3, eliminating blue-stain, carrying out blue-stain performance test on the sample after the sample is separated, carrying out the test method and effect evaluation according to the standard of GB/T18261-2000, measuring the color difference of the experimental sample before blue-stain and after blue-stain elimination by using a TCP II G full-automatic color measurement colorimeter, taking the average value as the experimental result, and keeping the independent variables consistent; the properties of each sample set are shown in the following table:
Figure 559735DEST_PATH_IMAGE002
assessment of damage value
Figure 804771DEST_PATH_IMAGE004
It can be seen from this that: the invention has good effect of eliminating color spots of rubber wood with blue stain, has low treatment cost and can be popularized and used in production. Economic loss and processing cost brought to rubber wood processing enterprises by blue change are reduced. Promoting economic promotion and effective utilization of resources. The invention effectively avoids the secondary blue-turning, effectively solves the blue-turning defect of the rubber wood, has important significance for maintaining the quality value of the wood, and can widen the application of the rubber wood in the fields of artware, furniture and the like with strict requirements on the appearance of the wood.

Claims (5)

1. A treatment method for eliminating blueing of rubber wood is characterized by comprising the following steps:
(1) placing the blue-changed rubber wood in the sun for 2-3 days, then uniformly spraying the prepared primary sterilizing agent on the surface, and soaking at 26-28 ℃ for 8-10 hours, wherein the primary scavenging agent is obtained by mixing lime water with the mass concentration of 0.8-0.9% and sodium chloride solution with the mass concentration of 1.3-1.5% according to the mass ratio of 4-6: 1.6-2.0;
(2) washing the rubber wood treated in the step (1) with clear water, putting the cleaned rubber wood into a heat treatment box, adding a zinc chloride aqueous solution, wherein the volume ratio of the material to the liquid is 1:1.3-1.4, soaking the rubber wood at 55-60 ℃ for 4-5 hours, adding a carbonized adsorbent accounting for 2.0-2.3% of the mass of the zinc chloride aqueous solution, heating the mixture to 160-180 ℃ by using water vapor, carrying out heating treatment for 25-30 minutes, cooling to 60-70 ℃, taking out the rubber wood, and carrying out irradiation treatment for 2-3 minutes by using an ultraviolet lamp;
(3) washing the rubber wood after irradiation treatment with clean water, wiping the surface moisture with a clean rag, placing the cleaned rubber wood in a vacuum pressure impregnation tank, vacuumizing the vacuum degree to be-0.09 MPa, keeping the vacuum degree for 10-15 minutes, adding an impregnant, completely immersing the rubber wood, keeping the vacuum degree at-0.12 MPa for 15-20 minutes, pressurizing the mixture to 0.45-0.55MPa, keeping the pressure for 50-60 minutes, releasing the pressure, the impregnant, taking out the impregnated rubber wood, and placing the impregnated rubber wood in an oven with the temperature of 100 ℃ and 110 ℃ for drying for 16-20 hours.
2. The method for eliminating the blue discoloration of rubber-wood as claimed in claim 1, wherein the amount of said primary sterilizing agent used in step (1) is 43-48 g/m.
3. The method for eliminating blueing of rubber-wood lumber according to claim 1, wherein the concentration of the zinc chloride aqueous solution in the step (2) is 1.4 to 1.8 g/l.
4. The treatment method for eliminating the blue stain of the rubber wood as claimed in claim 1, wherein the preparation method of the carbonized adsorbent in the step (2) comprises the following steps: cutting corn straws into pieces with the length of 1-3 mm, adding the pieces into a sodium carbonate aqueous solution with the mass concentration of 4.5-5.5%, soaking for 3-4 hours at the temperature of 30-35 ℃, and soaking the pieces in a liquor mass ratio of 1: 1.8 to 2.0, fishing out the straws after the soaking, extruding out excessive water, placing the straws in a carbonization furnace, heating to 410 and 420 ℃, preserving heat and carbonizing for 2 to 3 hours, continuously heating to 540 and 550 ℃, preserving heat for 20 to 30 minutes, and naturally cooling to room temperature.
5. The treatment method for eliminating the blue stain of the rubber wood as claimed in claim 1, wherein the impregnant in the step (3) is obtained by ultrasonically mixing the waterborne polyurethane with the solid content of 41-44% and the silver nitrate aqueous solution with the mass concentration of 1.4-1.8% according to the mass ratio of 170-180: 1.
CN202011523868.1A 2020-12-22 2020-12-22 Treatment method for eliminating blueing of rubber wood Withdrawn CN112497392A (en)

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