CN108247788A - A kind of method for improving solid wood slab dimensional stability - Google Patents
A kind of method for improving solid wood slab dimensional stability Download PDFInfo
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- CN108247788A CN108247788A CN201611233822.XA CN201611233822A CN108247788A CN 108247788 A CN108247788 A CN 108247788A CN 201611233822 A CN201611233822 A CN 201611233822A CN 108247788 A CN108247788 A CN 108247788A
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- rewetting
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- drying
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- 239000002023 wood Substances 0.000 title claims abstract description 60
- 239000007787 solid Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000001035 drying Methods 0.000 claims abstract description 40
- 238000007731 hot pressing Methods 0.000 claims abstract description 29
- 150000003839 salts Chemical class 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000001291 vacuum drying Methods 0.000 claims description 11
- 239000007921 spray Substances 0.000 claims description 10
- 239000003595 mist Substances 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 4
- 238000012545 processing Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 5
- 239000000463 material Substances 0.000 description 33
- 229920001971 elastomer Polymers 0.000 description 26
- 238000007605 air drying Methods 0.000 description 13
- 238000005336 cracking Methods 0.000 description 4
- 241000219492 Quercus Species 0.000 description 3
- 235000009137 Quercus alba Nutrition 0.000 description 3
- 241001531312 Quercus pubescens Species 0.000 description 3
- 239000012267 brine Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
Classifications
-
- 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
- B27K3/20—Compounds of alkali metals or ammonium
-
- 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
- B27K1/00—Damping 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
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/001—Heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B2210/00—Drying processes and machines for solid objects characterised by the specific requirements of the drying good
- F26B2210/14—Veneer, i.e. wood in thin sheets
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Drying Of Solid Materials (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The invention discloses a kind of method for improving solid wood slab dimensional stability, including：(1) hot-pressing drying processing is carried out to the solid wood slab, (2) carry out rewetting processing to step (1) treated solid wood slab；The hot-pressing drying processing includes two stages：The vacuumize process that heats up and secondary temperature elevation processing, the mass percentage of moisture is 1% 2% in obtained solid wood slab after hot-pressing drying processing；The rewetting processing includes two stages：Salt fog rewetting and steam rewetting, the biodiversity percentage composition in the solid wood slab obtained after the processing of above-mentioned rewetting is 8%.
Description
Technical Field
The invention relates to a solid wood geothermal floor, in particular to a method for improving the dimensional stability of a solid wood slab.
Background
The solid wood floor is favored by consumers with real wood vision, comfortable foot feeling and environmental friendliness, but when the solid wood floor is used in a geothermal environment, the solid wood floor is easy to deform and crack, and along with the increasing demand of domestic, especially Yangtze river drainage basins, on the solid wood geothermal floor, the solid wood floor needs to be treated by a series of methods, so that the dimensional stability of the solid wood floor is improved, and the solid wood floor is prevented from deforming, cracking, warping and the like in the geothermal environment.
Disclosure of Invention
The invention provides a method for improving the dimensional stability of a solid wood slab, which comprises the following steps:
(1) carrying out hot-pressing drying treatment on the solid wood plate blank;
(2) carrying out rewetting treatment on the solid wood slab treated in the step (1),
wherein the hot-pressing drying treatment comprises:
(i) heating and vacuumizing, wherein the heating treatment comprises the steps of raising the temperature from 76 ℃ to 100 ℃ at the rate of 4 ℃/hour, and simultaneously reducing the air pressure from 1030mbar to 175mbar at the rate of 210 ℃ and 215 mbar/hour;
(ii) (ii) a secondary ramping treatment comprising ramping the temperature from 100 ℃ to 140 ℃ at a rate of 10 ℃/hour while maintaining the gas pressure of 175mbar from step (i), at 140 ℃ for 20-24 hours;
the mass percentage of water in the solid wood board blank obtained after the hot-pressing drying treatment is 1-2%; the rewetting treatment comprises the following steps:
(i) salt spray rewetting, namely rewetting the solid wood plate blank obtained after the hot-pressing drying treatment for 48 hours at 90-95 ℃ by adopting salt spray with the salt content of 8-10% by mass;
(ii) carrying out steam rewetting on the solid wood plate blank subjected to the salt spray rewetting treatment under the conditions that the temperature is 100 ℃ and the humidity is 85-90%, wherein the duration is not more than 5 days; the moisture content of the solid wood slab obtained after the rewetting treatment is 8% by mass.
And in the secondary heating treatment process of the hot-pressing drying treatment, spraying water to the solid wood plate blank, wherein the water spraying amount is as follows: 0.8-1.2kg/m2The water spraying frequency is 10-15 minutes/time.
And after the hot-pressing drying treatment, cooling the solid wood slab to 90-95 ℃ and then carrying out rewetting treatment.
The hot-pressing drying treatment is carried out in a negative pressure vacuum drying kiln.
The rewetting treatment is carried out in a closed wood rewetting kiln.
The salt water mist in the salt mist rewetting process is sodium chloride salt water mist.
The method for improving the dimensional stability of the solid wood slab comprises two stages of hot-pressing drying treatment and moisture-returning treatment, the solid wood slab obtained through the hot-pressing drying treatment is extremely low in water content, the water is sprayed to the solid wood slab being treated in the hot-pressing drying treatment process, the slab is prevented from cracking in the drying process, and the moisture-returning treatment is carried out on the basis of the hot-pressing drying treatment, so that the solid wood slab absorbs certain salinity, and the moisture-resistant dimensional stability of the solid wood slab is improved. The method of the invention is adopted to process the solid wood slab, the density of the solid wood slab is increased, the stability of the solid wood slab is improved, and the problems that the solid wood floor is easy to deform, crack and warp when being used in a geothermal environment are effectively solved.
Detailed Description
The present invention is further illustrated by the following examples in conjunction with the accompanying drawings, but it is to be understood that the following examples are for illustrative purposes only and are not intended to limit the present invention, the scope of which is defined by the claims.
The embodiment of the invention takes a white rubber air-drying material as an exemplary solid wood slab, and illustrates a method for improving the dimensional stability of the solid wood slab, wherein the white rubber air-drying material has a thickness of 20mm and contains 12-14% of water by mass percent, and the method comprises two steps of hot-pressing drying treatment and rewetting treatment, and specifically comprises the following steps:
(1) carrying out hot-pressing drying treatment on the white rubber air-dried material in a negative pressure vacuum drying kiln: the white oak air-dried material is subjected to the following two stages in the hot-pressing drying treatment step:
the first stage is heating and vacuumizing treatment, because the white rubber air-dried material contains a large amount of combined water and free water, the water loss of the white rubber air-dried material is quick in the stage, in order to avoid the deformation and the breakage of the wood, an oil heat conduction system is adopted in a negative pressure vacuum drying kiln, the hot pressing temperature is heated from 76 ℃ to 100 ℃ at the heating rate of 4 ℃/hour, the negative pressure vacuum drying technology is adopted while the temperature is raised, a vacuum pump is used for vacuumizing the drying kiln, the air pressure in the drying kiln is reduced from 1030mbar to 175mbar at the pressure reduction rate of 210 plus 215 mbar/hour, and the boiling point of water is reduced along with the increase of the vacuum degree of the white rubber air-dried material in the negative pressure state, so that the evaporation and the volatilization of the water in the wood are facilitated, the flow rate of water vapor is increased, and the effect of improving the wood drying rate is achieved;
the second stage is a secondary heating treatment, in which the hot-pressing temperature is heated from 100 ℃ to 140 ℃ at a heating rate of 10 ℃/h, simultaneously the air pressure in the negative pressure vacuum drying kiln is maintained at 175mbar, and the air pressure is maintained for 20-24 hours after the temperature is raised to 140 ℃, because the temperature in the drying kiln is very high, the moisture in the drying kiln is extremely low, and the white rubber dry material is easy to crack, in order to protect the white rubber dry material, the surface of the white rubber dry material is sprayed with water once every 10-15 minutes for 10-12 times, and the moisture sprayed each time is 0.8-1.2kg/m2(ii) a And monitoring the water content of the air-dried oak material by using a probe which can be arranged at different positions and can monitor the water content of the air-dried oak material at different positions at any time, wherein the mass percentage of the water in the air-dried oak material after the hot-pressing drying treatment is 1-2% by the probe. The hot-pressing drying treatment is carried out in a negative pressure vacuum drying kiln, the negative pressure vacuum drying kiln body is made of aluminum alloy materials with good compression resistance and ageing resistance, and the stacking size of the whole negative pressure vacuum drying kiln can reach 6100 x 1600 x 1350 (mm); the negative pressure vacuum drying kiln also uses a stop valve for adjusting the heat flow to avoid cracking caused by uneven drying of the wood due to local overheating.
Finally, the whole hot-pressing drying treatment step is carried out for 30-36 hours, the thickness of the white oak air-dried material obtained through the hot-pressing drying treatment is about 18mm, the water content is 8%, the density of the white oak air-dried material is increased, and the stability is greatly improved.
(2) Naturally cooling the white rubber air-dried material treated in the step (1) to 90-95 ℃, transferring the white rubber air-dried material into a closed wood moisture returning kiln (in the embodiment, automatic conveying of materials between the two kilns can be realized through a guide rail between a negative pressure vacuum drying kiln and the closed wood moisture returning kiln), and carrying out moisture returning treatment, wherein the moisture returning treatment comprises the following two stages:
in the first stage, salt spray is adopted for rewetting, 6 annular high-pressure air blowers with air quantity up to 3500 liters/minute and a corrosion-resistant and high-strength PVC plate brine barrel are arranged in a closed wood rewetting kiln, the brine barrel is connected with a non-crystallization nozzle, under the condition that the rewetting temperature is 90-95 ℃, salt spray with sodium chloride content of 8-10% by mass in the brine barrel is sprayed to the surface of the white rubber air dry material obtained after hot-pressing drying treatment by adopting an air pressure spraying method, the rewetting treatment is carried out for 48 hours, and under the action of high-speed circulating air of the air blowers, the salt spray is uniformly distributed to the surface of the solid wood plate blank; at this stage, on one hand, the salt filling of the white rubber air-drying material can be increased, and the density of the white rubber air-drying material can be increased, so that the stability of the white rubber air-drying material is improved, on the other hand, the white rubber air-drying material can be more easily in a relatively stable moisture absorption saturated state after absorbing a certain salt, and the moisture-proof dimensional stability of the white rubber air-drying material is improved;
in the second stage, high-temperature and high-humidity steam is used for rewetting, a steam generator with the power of 24kw is arranged at one end of the bottom of the inner side of the rewetting kiln, the temperature is increased from 90 ℃ to 100 ℃ in the rewetting kiln at the temperature increasing rate of 20 ℃/hour, the flow rate of the steam generator is adjusted to regulate the humidity in the rewetting kiln to be 85-90%, and the rewetting treatment is carried out for no more than 5 days;
wherein, still be equipped with the ink wash dust collector that is located the inside bottom one end of kiln of rewetting in the closed timber kiln of rewetting, it can effectively adsorb the interior dust of kiln.
Measuring the mass percent of the water content of the white rubber air dry material by a probe to be 8%, finishing the rewetting treatment, naturally cooling the rewetting kiln to the room temperature of less than or equal to 30 ℃, and then taking out of the kiln; the time required for the whole rewetting step is about 7 days.
The hot-pressing drying treatment step in the method adopts a mode of gradually pressurizing and slowly heating for press-drying treatment, and compared with the conventional drying, the method can effectively prevent the deformation, cracking and warping of the solid wood caused by rapid dehydration. The invention adopts salt spray rewetting and high-temperature high-humidity steam rewetting treatment in the rewetting treatment step, and the whole rewetting step only needs about 7 days, which greatly shortens the rewetting treatment time and has no disadvantages of uneven rewetting and the like compared with the common natural rewetting treatment which needs about at least one month.
The dimensional stability of the white rubber air-drying material obtained by the processing of the method is measured by adopting a method in LY/T1700-2007 wooden floor heating, and the result shows that the heat-resistant dimensional stability of the white rubber air-drying material in the width direction is less than or equal to 0.59%, the moisture-proof dimensional stability of the white rubber air-drying material in the width direction is less than or equal to 0.50%, the heat-resistant dimensional stability of the white rubber air-drying material in the length direction is less than or equal to 0.07%, the moisture-proof dimensional stability of the white rubber air-drying material in the length direction is less than or equal to 0.07%, and the moisture-proof dimensional stability of the white rubber air-drying material in the length direction is less than or equal to 1; the dimensional stability test is also carried out on the white rubber air-dried material with the final water content of 8 percent by mass obtained by the conventional direct press-drying method in the prior art, and the result shows that the heat-resistant dimensional stability in the width direction is 1.95 percent, the moisture-resistant dimensional stability in the width direction is 0.8 percent, the heat-resistant dimensional stability in the length direction is 0.17 percent, and the moisture-resistant dimensional stability in the width direction is 0.1 percent, so that the white rubber air-dried material does not meet the national standard requirement.
As can be seen from the heat-resistant dimensional stability data and the moisture-resistant dimensional stability data, the dimensional stability of the solid wood slab processed by the method meets the national standard, and the stability of the solid wood slab is far higher than that of the solid wood slab processed by the conventional method.
The present invention has been described in conjunction with specific embodiments which are intended to be exemplary only and are not intended to limit the scope of the invention, which is to be given the full breadth of the appended claims and any and all modifications, variations or alterations that may occur to those skilled in the art without departing from the spirit of the invention. Therefore, various equivalent changes made according to the present invention are still within the scope of the present invention.
Claims (6)
1. A method for improving the dimensional stability of a solid wood slab, the method comprising:
(1) carrying out hot-pressing drying treatment on the solid wood plate blank;
(2) carrying out rewetting treatment on the solid wood slab treated in the step (1),
wherein,
the hot-pressing drying treatment comprises the following steps:
(i) heating and vacuumizing, wherein the heating treatment comprises the steps of raising the temperature from 76 ℃ to 100 ℃ at the rate of 4 ℃/hour, and simultaneously reducing the air pressure from 1030mbar to 175mbar at the rate of 210 ℃ and 215 mbar/hour;
(ii) (ii) a secondary ramping treatment comprising ramping the temperature from 100 ℃ to 140 ℃ at a rate of 10 ℃/hour for 20-24 hours at 140 ℃ while maintaining the gas pressure of 175mbar from step (i);
the mass percentage of water in the solid wood board blank obtained after the hot-pressing drying treatment is 1-2%;
the rewetting treatment comprises the following steps:
(i) salt spray rewetting, namely rewetting the solid wood plate blank obtained after the hot-pressing drying treatment for 48 hours at 90-95 ℃ by adopting salt spray with the salt content of 8-10% by mass;
(ii) carrying out steam rewetting on the solid wood plate blank obtained after the salt spray rewetting treatment under the conditions that the temperature is 100 ℃ and the humidity is 85-90%, wherein the duration is not more than 5 days; the moisture content of the solid wood slab obtained after the rewetting treatment is 8% by mass.
2. The method according to claim 1, wherein the solid wood mat is sprayed with water during the secondary heating process of the hot press drying process, the water spraying amount being: 0.8-1.2kg/m2The water spraying frequency is 10-15 minutes/time.
3. The method of claim 1, wherein the solid wood mat is cooled to 90-95 ℃ after the hot press drying treatment and then subjected to a rewetting treatment.
4. The method of claim 1, wherein the autoclave drying process is performed in a negative pressure vacuum drying kiln.
5. A method according to claim 1, wherein the rewetting treatment is performed in a closed wood rewetting kiln.
6. The method of claim 1, wherein the salt water mist in the salt mist rewetting is a sodium chloride salt water mist.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611233822.XA CN108247788B (en) | 2016-12-28 | 2016-12-28 | A method of for improving solid wood slab dimensional stability |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611233822.XA CN108247788B (en) | 2016-12-28 | 2016-12-28 | A method of for improving solid wood slab dimensional stability |
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| CN108247788A true CN108247788A (en) | 2018-07-06 |
| CN108247788B CN108247788B (en) | 2019-08-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110625718A (en) * | 2019-08-27 | 2019-12-31 | 中山市大自然木业有限公司 | Method for improving dimensional stability of solid wood board |
| CN114986638A (en) * | 2022-06-13 | 2022-09-02 | 浙江省林业科学研究院 | Preparation method of green mildew-proof bamboo wood for food contact |
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| JPH05177769A (en) * | 1991-11-27 | 1993-07-20 | Kureha Plast Kk | Coated particle board and production thereof |
| CN101745947A (en) * | 2010-02-03 | 2010-06-23 | 中国林业科学研究院木材工业研究所 | Bamboo-wood composite board and preparation method thereof |
| CN103496023A (en) * | 2013-09-29 | 2014-01-08 | 巴洛克木业(中山)有限公司 | Method for manufacturing solid wood multilayer composite floor |
| CN105235040A (en) * | 2015-10-25 | 2016-01-13 | 中国林业科学研究院木材工业研究所 | Processing method of solid wood floor blanks used for floor heating |
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- 2016-12-28 CN CN201611233822.XA patent/CN108247788B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05177769A (en) * | 1991-11-27 | 1993-07-20 | Kureha Plast Kk | Coated particle board and production thereof |
| CN101745947A (en) * | 2010-02-03 | 2010-06-23 | 中国林业科学研究院木材工业研究所 | Bamboo-wood composite board and preparation method thereof |
| CN103496023A (en) * | 2013-09-29 | 2014-01-08 | 巴洛克木业(中山)有限公司 | Method for manufacturing solid wood multilayer composite floor |
| CN105235040A (en) * | 2015-10-25 | 2016-01-13 | 中国林业科学研究院木材工业研究所 | Processing method of solid wood floor blanks used for floor heating |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110625718A (en) * | 2019-08-27 | 2019-12-31 | 中山市大自然木业有限公司 | Method for improving dimensional stability of solid wood board |
| CN114986638A (en) * | 2022-06-13 | 2022-09-02 | 浙江省林业科学研究院 | Preparation method of green mildew-proof bamboo wood for food contact |
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| CN108247788B (en) | 2019-08-02 |
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Effective date of registration: 20231017 Address after: No. 1338 Gree Avenue, Economic Development Zone, Nankang District, Ganzhou City, Jiangxi Province, 341000 Patentee after: Ganzhou nature home furnishing Co.,Ltd. Address before: 528400 Nanwen Community First Industrial Zone (Makeng) Factory Building, Dayong Town, Zhongshan City, Guangdong Province Patentee before: ZHONGSHAN NATURE WOOD INDUSTRY Co.,Ltd. |
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