CN109676730B - Wood bleaching agent formula and treatment process and treatment device thereof - Google Patents
Wood bleaching agent formula and treatment process and treatment device thereof Download PDFInfo
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- CN109676730B CN109676730B CN201811350136.XA CN201811350136A CN109676730B CN 109676730 B CN109676730 B CN 109676730B CN 201811350136 A CN201811350136 A CN 201811350136A CN 109676730 B CN109676730 B CN 109676730B
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- wood
- bleaching agent
- applicator roll
- bleaching
- hydrogen peroxide
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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
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/04—Combined bleaching or impregnating and drying of wood
-
- 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
- B27K3/12—Impregnating by coating the surface of the wood with an impregnating paste
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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
- B27K3/52—Impregnating agents containing mixtures of inorganic and organic compounds
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- 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
- B27M1/02—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching by compressing
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The invention discloses a wood bleaching agent formula which is prepared by mixing hydrogen peroxide, ammonium bicarbonate, sodium persulfate, urea and water, wherein the contents of the hydrogen peroxide, the ammonium bicarbonate, the sodium persulfate and the urea are respectively as follows by weight: 950 to 1050: 3-6: 1.5-2.5: 9 to 11. The invention also discloses a wood bleaching agent formula treatment process, which comprises the following steps: s01, preparing the wood bleaching agent solution as described above; s02, uniformly coating the wood bleaching agent in the S01 on the surface of the wood; and S03, putting the coated wood into a hot press for hot pressing. The invention also discloses a wood bleaching agent formula treatment device. The wood bleaching agent formula, the treatment process and the treatment device thereof disclosed by the invention have mild bleaching reaction, can well restore the original texture and wood color of wood, can keep the drug effect all the time before the bleaching agent is completely used, cannot generate waste liquid due to bleaching agent failure, and reduce the production cost.
Description
Technical Field
The invention relates to a wood bleaching agent formula, a treatment process and a treatment device thereof, belonging to the field of wood bleaching.
Background
The wood bleaching is to use oxidation-reduction reaction to oxidize, reduce and degrade chromophoric groups and chromophoric groups in the wood and the components related to coloring so as to achieve the purpose of decolorization. The bleaching treatment of the wood can improve the visual characteristics and decorative performance of the wood and improve the utilization value of the wood. The bleached wood has double excellent performances of texture and wood color.
The basic chromophoric groups of wood are the carbonyl and carboxyl groups of the side chains of benzene rings, quinones, lignin phenylpropane monomers, carbon-carbon double chains. In addition, the presence of co-coloring groups such as hydroxyl (-OH) and methoxy groups also makes wood susceptible to discoloration. The potential chromophoric group is colorless per se and mostly exists in conjugated double bonds, and when the potential chromophoric group is acted by light and oxygen, pi bonds in a conjugated system are broken to generate free radicals, so that photochemical degradation is carried out to darken the color of wood. Therefore, bleaching and decoloring effects can be produced by using oxidizing or reducing chemicals which destroy chromophoric groups and blocked auxochromic groups capable of absorbing visible light in wood.
Hydrogen peroxide and sodium chlorite, which are oxidative bleaches, are significantly enhanced by adjusting the pH of the hydrogen peroxide solution to alkaline and the pH of the sodium chlorite aqueous solution to acidic. The bleaching ability of various aqueous solutions of rongalite of reduction type bleaching agent hydrazine hydrate is very low at room temperature, and if the aqueous solutions are heated to 80 ℃, the reduction bleaching ability is greatly enhanced.
The bleaching agent is used at normal temperature, and generally the bleaching agent is ineffective before being used up, so that the production cost is high.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art and provide a wood bleaching agent formula, a treatment process and a treatment device thereof, wherein the wood bleaching agent formula has mild bleaching reaction, can better restore the original texture and wood color of wood and prolong the effective time of the bleaching agent.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the formula of the wood bleaching agent is prepared by mixing hydrogen peroxide, ammonium bicarbonate, sodium persulfate, urea and water, wherein the contents of the hydrogen peroxide, the ammonium bicarbonate, the sodium persulfate and the urea are respectively as follows by weight: 950 to 1050: 3-6: 1.5-2.5: 9 to 11.
The mass of water in the formula is equal to the sum of the mass of hydrogen peroxide, ammonium bicarbonate, sodium persulfate and urea.
The mass fraction of the hydrogen peroxide is 30 percent.
A wood bleaching agent formula treatment process comprises the following steps:
s01, formulating the wood bleach formulation of any one of claims 1 to 3;
s02, uniformly coating the wood bleaching agent in the S01 on the surface of the wood;
and S03, putting the coated wood into a hot press for hot pressing.
S03, setting the hot-pressing temperature at 100-120 ℃ and the hot-pressing pressure at 6-8 kg/cm2And the hot pressing time is 1.5-5 minutes.
In S02, the storage temperature of the bleaching agent is kept constant at 3-5 ℃.
A wood bleaching agent formula processing apparatus which characterized in that: the wood board bleaching device comprises a rubber coating machine groove, wherein a bleaching solution is arranged in the rubber coating machine groove, an upper applicator roll and a lower applicator roll are arranged above the rubber coating machine groove, the upper applicator roll is positioned above the lower applicator roll, the lower applicator roll is contacted with the bleaching solution, a wood board to be bleached is arranged between the upper applicator roll and the lower applicator roll, and the upper applicator roll and the lower applicator roll rotate to drive the wood board to be bleached to move and paint the bleaching solution on the surface of the wood board.
And a condenser is arranged outside the gumming machine groove.
The invention has the beneficial effects that: the invention provides a formula of a wood bleaching agent, a treatment process and a treatment device thereof. Hydrogen peroxide is decomposed in solution to generate perhydroxyl ion (HO)2 －) The bleaching effect is achieved, in addition, ammonium bicarbonate is used as an activating auxiliary agent, and the aqueous solution is alkaline, so that the bleaching effect of hydrogen peroxide can be enhanced; the aqueous solution of sodium persulfate is weakly alkaline and shows mild bleaching action with its stock solution. The alkaline condition is favorable for the decomposition of hydrogen peroxide, and the bleaching effect is improved. When the bleaching agent prepared by the invention is used for bleaching wood, the reaction is mild, and the original texture and wood color of the wood can be well reduced. Meanwhile, a condenser is arranged outside the slot of the glue applicator to ensure that the temperature of the bleaching solution is constant in the effect for a long timeWithin the range, no waste liquid is generated due to the failure of the liquid medicine, and the production cost of the bleaching agent is reduced.
Drawings
FIG. 1 is a schematic structural diagram of a wood bleaching agent formulation treatment apparatus according to the present invention;
FIG. 2 is a schematic view of the hot pressing process of the hot press of the present invention.
The reference numbers in the figures are as follows: 1-upper applicator roll, 2-wood plate to be bleached, 3-lower applicator roll, 4-glue coater tank, 5-bleaching solution and 6-condenser.
Detailed Description
The present invention is further described with reference to the accompanying drawings, and the following examples are only for clearly illustrating the technical solutions of the present invention, and should not be taken as limiting the scope of the present invention.
Detailed description of the preferred embodiment 1
The invention discloses a wood bleaching agent formula, which is formed by mixing hydrogen peroxide, ammonium bicarbonate, sodium persulfate, urea and water, wherein the contents of the hydrogen peroxide, the ammonium bicarbonate, the sodium persulfate and the urea are respectively as follows by weight: 950: 3: 1.5: 9. the mass of water in the formula is equal to the sum of the mass of hydrogen peroxide, ammonium bicarbonate, sodium persulfate and urea. Specifically, 95kg of hydrogen peroxide, 0.3kg of ammonium bicarbonate, 0.15kg of sodium persulfate and 0.9kg of urea are weighed and added into 96.35kg of water to be fully mixed, so as to prepare the bleaching solution. Wherein the mass fraction of the hydrogen peroxide is 30 percent.
The invention relates to a wood bleaching agent formula treatment process, which comprises the following steps:
s01, preparing the wood bleaching agent solution.
S02, adding the wood bleaching agent solution in the S01 into a glue spreader tank of a veneer of a plywood, uniformly coating the bleaching solution on the surface of a northeast China ash sliced plate with the size of 1220 × 2440 × 3mm through a glue spreader roller on the glue spreader, and keeping the temperature of the bleaching agent solution constant at 3-5 ℃ through a condenser outside the glue spreader tank so as to fully ensure the pesticide effect.
And S03, putting the coated wood into a hot press for hot pressing. Wherein the hot pressing temperature is set at 100 deg.C, and hot pressing is carried outThe pressure was set at 6kg/cm2The hot pressing time was 1.5 minutes.
The steps are used for completing the bleaching treatment of the wood veneer, the surface of the fraxinus mandshurica slice board before treatment is old, has black ribs and has the whiteness of 19.5 percent; the phenomenon of black ribs on the surface of the fraxinus mandshurica is solved after bleaching treatment, and the whiteness is 25.7 percent.
As shown in fig. 1, the wood bleaching agent formula processing device comprises a glue applicator tank 4, wherein a bleaching solution 5 is arranged in the glue applicator tank 4, an upper applicator roll 1 and a lower applicator roll 3 are arranged above the glue applicator tank 4, the upper applicator roll 1 is positioned above the lower applicator roll 3, part of the lower applicator roll 3 is soaked in the bleaching solution 5, a wood board 2 is arranged between the upper applicator roll 1 and the lower applicator roll 3, glue is applied to the wood board 2 through the upper applicator roll 1 and the lower applicator roll 3, and a condenser 6 is arranged outside the glue applicator tank 4. As shown in fig. 2, the wood 2 coated with the bleach solution is hot pressed using an upper hot press plate 7 and a lower hot press plate 8.
Specific example 2
The invention discloses a wood bleaching agent formula, which is formed by mixing hydrogen peroxide, ammonium bicarbonate, sodium persulfate, urea and water, wherein the contents of the hydrogen peroxide, the ammonium bicarbonate, the sodium persulfate and the urea are respectively as follows by weight: 1000: 4.5: 2: 10. the mass of water in the formula is equal to the sum of the mass of hydrogen peroxide, ammonium bicarbonate, sodium persulfate and urea. Specifically, 100kg of hydrogen peroxide, 0.45kg of ammonium bicarbonate, 0.2kg of sodium persulfate and 1kg of urea are weighed and added into 101.65kg of water to be fully mixed to prepare the bleaching solution. Wherein the mass fraction of the hydrogen peroxide is 30 percent.
The invention relates to a wood bleaching agent formula treatment process, which comprises the following steps:
s01, preparing the wood bleaching agent solution.
S02, adding the wood bleaching agent solution in the S01 into a glue spreader tank of a veneer of a plywood, uniformly coating the bleaching solution on the surface of a northeast China ash sliced plate with the size of 1220 × 2440 × 3mm through a glue spreader roller on the glue spreader, and keeping the temperature of the bleaching agent solution constant at 3-5 ℃ through a condenser outside the glue spreader tank so as to fully ensure the pesticide effect.
And S03, putting the coated wood into a hot press for hot pressing. Wherein the hot pressing temperature is set at 110 deg.C, and the hot pressing pressure is set at 7kg/cm2The hot pressing time was 3 minutes.
The steps are used for completing the bleaching treatment of the wood veneer, the surface of the fraxinus mandshurica slice board before treatment is old, has black ribs and has the whiteness of 19.5 percent; the black stringy phenomenon on the surface of the fraxinus mandshurica is solved after bleaching treatment, and the whiteness is 26.3 percent.
As shown in fig. 1, the wood bleaching agent formula processing device comprises a glue applicator tank 4, wherein a bleaching solution 5 is arranged in the glue applicator tank 4, an upper applicator roll 1 and a lower applicator roll 3 are arranged above the glue applicator tank 4, the upper applicator roll 1 is positioned above the lower applicator roll 3, part of the lower applicator roll 3 is soaked in the bleaching solution 5, a wood board 2 is arranged between the upper applicator roll 1 and the lower applicator roll 3, glue is applied to the wood board 2 through the upper applicator roll 1 and the lower applicator roll 3, and a condenser 6 is arranged outside the glue applicator tank 4. As shown in fig. 2, the wood 2 coated with the bleach solution is hot pressed using an upper hot press plate 7 and a lower hot press plate 8.
Specific example 3
The invention discloses a wood bleaching agent formula, which is formed by mixing hydrogen peroxide, ammonium bicarbonate, sodium persulfate, urea and water, wherein the contents of the hydrogen peroxide, the ammonium bicarbonate, the sodium persulfate and the urea are respectively as follows by weight: 1050: 6: 2.5: 11. the mass of water in the formula is equal to the sum of the mass of hydrogen peroxide, ammonium bicarbonate, sodium persulfate and urea. Specifically, 105kg of hydrogen peroxide, 0.6kg of ammonium bicarbonate, 0.25kg of sodium persulfate and 0.11kg of urea are weighed and added into 105.96kg of water to be fully mixed to prepare the bleaching solution. Wherein the mass fraction of the hydrogen peroxide is 30 percent.
The invention relates to a wood bleaching agent formula treatment process, which comprises the following steps:
s01, preparing the wood bleaching agent solution.
S02, adding the wood bleaching agent solution in the S01 into a glue spreader tank of a veneer of a plywood, uniformly coating the bleaching solution on the surface of a northeast China ash sliced plate with the size of 1220 × 2440 × 3mm through a glue spreader roller on the glue spreader, and keeping the temperature of the bleaching agent solution constant at 3-5 ℃ through a condenser outside the glue spreader tank so as to fully ensure the pesticide effect.
And S03, putting the coated wood into a hot press for hot pressing. Wherein the hot pressing temperature is set at 120 deg.C, and the hot pressing pressure is set at 8kg/cm2The hot pressing time was 5 minutes.
The steps are used for completing the bleaching treatment of the wood veneer, the surface of the fraxinus mandshurica slice board before treatment is old, has black ribs and has the whiteness of 19.5 percent; the black stringy phenomenon on the surface of the fraxinus mandshurica is solved after bleaching treatment, and the whiteness is 26.1 percent.
As shown in fig. 1, the wood bleaching agent formula processing device comprises a glue applicator tank 4, wherein a bleaching solution 5 is arranged in the glue applicator tank 4, an upper applicator roll 1 and a lower applicator roll 3 are arranged above the glue applicator tank 4, the upper applicator roll 1 is positioned above the lower applicator roll 3, part of the lower applicator roll 3 is soaked in the bleaching solution 5, a wood board 2 is arranged between the upper applicator roll 1 and the lower applicator roll 3, glue is applied to the wood board 2 through the upper applicator roll 1 and the lower applicator roll 3, and a condenser 6 is arranged outside the glue applicator tank 4. As shown in fig. 2, the wood 2 coated with the bleach solution is hot pressed using an upper hot press plate 7 and a lower hot press plate 8.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (4)
1. A wood bleaching agent formula treatment process is characterized in that: the method comprises the following steps:
s01, preparing a wood bleaching agent formula, wherein the wood bleaching agent formula is prepared by mixing hydrogen peroxide, ammonium bicarbonate, sodium persulfate, urea and water, and the contents of the hydrogen peroxide, the ammonium bicarbonate, the sodium persulfate and the urea are as follows by weight: 950 to 1050: 3-6: 1.5-2.5: 9-11;
s02, uniformly coating the wood bleaching agent in the S01 on the surface of the wood, keeping the preservation temperature of the bleaching agent constant at 3-5 ℃, using a wood bleaching agent formula treatment device, wherein the wood bleaching agent formula treatment device comprises a glue spreader tank (4), a bleaching solution (5) is arranged in the glue spreader groove (4), an upper glue applicator roll (1) and a lower glue applicator roll (3) are arranged above the glue spreader groove (4), the upper applicator roll (1) is positioned above the lower applicator roll (3), the lower applicator roll (3) is contacted with the bleaching solution (5), the wood plate (2) to be bleached is arranged between the upper applicator roll (1) and the lower applicator roll (3), the upper applicator roll (1) and the lower applicator roll (3) rotate to drive the wood board (2) to be bleached to move and coat a bleaching solution (5) on the surface of the wood board, and a condenser (6) is arranged outside the glue coater tank (4);
and S03, putting the coated wood into a hot press for hot pressing.
2. The wood bleaching agent formulation treatment process of claim 1, wherein: the mass of water in the formula is equal to the sum of the mass of hydrogen peroxide, ammonium bicarbonate, sodium persulfate and urea.
3. The wood bleaching agent formulation treatment process of claim 1, wherein: the mass fraction of the hydrogen peroxide is 30 percent.
4. The wood bleaching agent formulation treatment process of claim 1, wherein: s03, setting the hot-pressing temperature at 100-120 ℃ and the hot-pressing pressure at 6-8 kg/cm2And the hot pressing time is 1.5-5 minutes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811350136.XA CN109676730B (en) | 2018-11-14 | 2018-11-14 | Wood bleaching agent formula and treatment process and treatment device thereof |
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| CN201811350136.XA CN109676730B (en) | 2018-11-14 | 2018-11-14 | Wood bleaching agent formula and treatment process and treatment device thereof |
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| CN109676730B true CN109676730B (en) | 2020-07-31 |
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| CN114055991A (en) * | 2021-12-03 | 2022-02-18 | 德华兔宝宝装饰新材股份有限公司 | High-color-fastness antibacterial dyed decorative veneer |
| CN116197981A (en) * | 2023-02-03 | 2023-06-02 | 惠州市摩彩装饰材料有限公司 | Preparation method of UV semi-open coating plate for digital printing of wood skin textures |
| CN116277351A (en) * | 2023-04-19 | 2023-06-23 | 千年舟新材科技集团股份有限公司 | Bleaching agent special for post bleaching process and shaving board manufacturing process based on post bleaching process |
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| CN201385347Y (en) * | 2009-03-20 | 2010-01-20 | 大连佳林设备制造有限公司 | Multi-functional roller coating machine |
| CN101718032A (en) * | 2009-05-13 | 2010-06-02 | 上海龙之杰企业发展有限公司 | Bleaching agent for scouring muslin yarn and bast fiber fabrics |
| CN104191482A (en) * | 2014-08-28 | 2014-12-10 | 苏雄孟 | Method for bleaching wood by use of hydrogen peroxide and sodium carbonate |
| CN104191480A (en) * | 2014-08-28 | 2014-12-10 | 苏雄孟 | Formula for bleaching wood and using method of formula |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57188309A (en) * | 1981-05-18 | 1982-11-19 | Hodogaya Chemical Co Ltd | Method of bleaching wood |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201385347Y (en) * | 2009-03-20 | 2010-01-20 | 大连佳林设备制造有限公司 | Multi-functional roller coating machine |
| CN101718032A (en) * | 2009-05-13 | 2010-06-02 | 上海龙之杰企业发展有限公司 | Bleaching agent for scouring muslin yarn and bast fiber fabrics |
| CN104191482A (en) * | 2014-08-28 | 2014-12-10 | 苏雄孟 | Method for bleaching wood by use of hydrogen peroxide and sodium carbonate |
| CN104191480A (en) * | 2014-08-28 | 2014-12-10 | 苏雄孟 | Formula for bleaching wood and using method of formula |
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Application publication date: 20190426 Assignee: Shanghai Yicun Fuwang Wood Industry Co.,Ltd. Assignor: NANJING FORESTRY University Contract record no.: X2020980006996 Denomination of invention: A wood bleaching agent formula and its treatment process and treatment device Granted publication date: 20200731 License type: Common License Record date: 20201021 Application publication date: 20190426 Assignee: Shanghai Gaoyi Decoration Material Co.,Ltd. Assignor: NANJING FORESTRY University Contract record no.: X2020980007079 Denomination of invention: A wood bleaching agent formula and its treatment process and treatment device Granted publication date: 20200731 License type: Common License Record date: 20201022 |
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Effective date of registration: 20230308 Address after: 214299 Industrial Economic Community (Democratic Community), Xushe Town, Yixing City, Wuxi City, Jiangsu Province Patentee after: Yixing Deda Wood Industry Co.,Ltd. Address before: Nanjing City, Jiangsu province 210037 Longpan Road No. 159 Patentee before: NANJING FORESTRY University |
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