CN114888915B - Processing method for tough-woven wicker - Google Patents
Processing method for tough-woven wicker Download PDFInfo
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- CN114888915B CN114888915B CN202210517377.9A CN202210517377A CN114888915B CN 114888915 B CN114888915 B CN 114888915B CN 202210517377 A CN202210517377 A CN 202210517377A CN 114888915 B CN114888915 B CN 114888915B
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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
- B27M1/08—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching by multi-step processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27J—MECHANICAL WORKING OF CANE, CORK, OR SIMILAR MATERIALS
- B27J3/00—Peeling osier rods
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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
- B27K3/15—Impregnating involving polymerisation including use of polymer-containing impregnating agents
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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
- B27K3/16—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
- B27K3/34—Organic impregnating agents
- B27K3/38—Aromatic compounds
- B27K3/42—Aromatic compounds nitrated, or nitrated and halogenated
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/02—Polyamines
- C08G73/026—Wholly aromatic polyamines
- C08G73/0266—Polyanilines or derivatives thereof
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Forests & Forestry (AREA)
- Wood Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a processing method for strongly-woven wicker, which belongs to the technical field of wicker, and comprises the steps of dipping aniline and manganese sulfate, carrying out polymerization and hydrothermal oxidation reaction to generate polyaniline and manganese dioxide, carrying out inflation treatment on the interior of the wicker by using a polyaniline polymerization system, firstly inflating wood cell walls through polyaniline oxidative polymerization heat release, then oxidizing manganese sulfate to generate manganese oxide to fully and uniformly fill cell cavities, using persulfate of a hydrothermal activation solution as a polymerization catalyst and an oxidant generated by manganese oxide, and forming a polymer and a wood matrix with strong interfacial force so as to improve the mechanical property of the polymer and further improve the toughness of the wicker.
Description
Technical Field
The invention belongs to the technical field of wicker weaving, and particularly relates to a processing method for strongly-woven wickers.
Background
Wicker is a traditional manual process for weaving articles for daily use and folk artware by using wicker branches. Willow has developed root system, drought resistance, cold resistance, water and moisture resistance and barren resistance, has strong environment adaptability, and is particularly suitable for growing in hillside, river bank, water side, wetland, sand land and other environments. In China, willows grow in almost all provinces. The germination capacity of the willow is extremely outstanding, and new willow twigs can grow quickly at the branch fracture. For example, the species of salix integra can be classified into yellow, red, white, cyan, etc. according to the skin color. The golden-silk willow, namely the yellow-skin salix integra, has the best quality and is flexible and uniform. The green-peel salix integra has poor quality but high yield. The physiological characteristics of willow provide rich and reliable raw materials for wickerwork. Wicker products are favored by consumers because of their characteristics of better strength and certain toughness. The prior wicker box and wicker basket can bear the impact in the transportation process and are used as daily necessities for carrying on back frequently. Various means such as surface coating, copper plating and the like are tried to improve the toughness of the wicker. CN201610795937.1 a preparation method of wicker enhancer discloses a reinforcing agent composed of talcum powder, limestone powder and calcium carbonate, but the above components can not enter the interior of wicker, and the reinforcing and toughening effects are difficult to realize, as well as similar CN201610688295.5 wicker curing agent and its preparation method; chinese patent CN201810353814 discloses a copper plating enhancement treatment technology for wicker raw materials, which discloses copper plating and chemical copper plating of wickers, wherein the coating treatment can effectively show the gorgeous decoration of wicker products, but the unaesthetic style of the traditional wicker is lost, and after copper plating, copper on the surface of the wicker after bending is easy to crack, so that the wicker is used as a living article, and the enhancement and toughening effects are limited. With the rapid development of modern wicker craft products, wickers produced by the traditional technology cannot meet the use requirement of strong toughness, the application field range and functions of wicker crafts are severely limited, and the technical personnel in the field need to develop a treatment process method for strongly weaving wickers urgently.
Disclosure of Invention
The invention aims to provide a processing technique for strengthening and toughening braided wicker aiming at the existing problems.
The alcohol lamp has three layers of flame core, inner flame and outer flame, the flame core has lower temperature, the inner flame has higher temperature than the foil core, the outer flame has higher temperature than the inner flame, and the highest temperature is between the inner flame and the outer flame. Conventionally, alcohol lamps have been used and generally heated with an outer flame. The application adopts the flame core for baking;
the wick is at the position of the flame core where the temperature is lowest and there is little combustion. In addition, alcohol used in alcohol lamps contains a small amount of water, and when alcohol is burned, water adheres to the wick. The temperature of the flame core is low, so that the wickers containing moisture are not ignited sufficiently. Meanwhile, a large amount of heat is taken away in the combustion process of the alcohol burner flame wick, so that the heat of the surrounding part of the burner wick is lower, the burning point of the wickers is not reached, and the wickers cannot be combusted. Certain heat is transferred, so that the wicker skin is heated and easily separated from the wicker body, the wicker skin separation is beneficial to subsequent dipping treatment, and meanwhile, certain high temperature volatilizes small molecular substances in the wickers to realize the effect of flexing;
a processing method for strengthening and toughening braided wickers comprises the following steps:
(1) Removing the peel by flame: baking the surface of the wicker for 1 to 2 times by using a flame core part of a low-temperature alcohol lamp to remove the outer skin on the surface of the wicker; (2) dipping: soaking the peeled wicker in 1 to 1.5mol/L diluted acid, wherein the bath ratio is 1: 4 to 5, the soaking temperature is 25 to 30 ℃, the diluted acid contains 5 to 8 percent of aniline and 4.4 to 6.7 percent of manganese sulfate, and the soaking time is 16 to 24h;
soaking in acid liquor to fill the fibers in the wickers with manganese sulfate and aniline;
(3) Washing and drying: washing the surface of the wicker with clean water until the surface of the wicker is free of light pink liquid, and drying the wicker at 50 to 60 ℃ until the water content is 5 to 7 percent; (4) hydrothermal treatment: putting the hydrothermal activating solution into a reaction kettle, putting the dried wicker into the reaction kettle, standing for 1-2h at 25-30 ℃, and heating for hydrothermal reaction for 12-16 h at 232-256kPa130-140 ℃;
manganese sulfate is used as a manganese source, ammonium persulfate is used as an oxidant, and manganese dioxide particles are synthesized by a hydrothermal method;
(5) Cleaning: washing the wicker obtained in the step (4) with ethanol for 1 to 3 times, and washing with clean water for 1 to 2 times;
(6) And (3) drying: and coating the surface of the wicker with lacquer, and naturally drying the wicker in the air to obtain the wicker.
Further, the diluted acid used in the step (2) for impregnation is one of hydrochloric acid or sulfuric acid.
Further, the hydrothermal activating solution is one of a potassium persulfate solution or an ammonium persulfate solution, the mass fraction concentration of the hydrothermal activating solution is 25 to 30%, and the pH value of the hydrothermal activating solution is 3.8 to 4.3.
And further, the drying in the step (6) is to increase the temperature in the oven to 45 to 50 ℃ and dry the wicker until the water content of the wicker is 7.5 to 9 percent.
Further, the willow twigs in the step (1) are one of salix integra, salix matsudana and salix weeping willow.
Further, the paint used in the step (6) is a uniform mixture of a bone cement solution and raw lacquer in a mass ratio of 1-1.5: 2-3, and the coating amount is 80-100g/m 2 。
The method paint is called joint-closing paint and thin spot paint by painters in the past, and is prepared by stirring, winding and drawing the materials by a stick until long filaments with noodle shapes are pulled out without sticking hands.
The invention has the beneficial effects that:
the invention discloses a processing method of a tough-woven wicker, which comprises the steps of firstly soaking a cell cavity and a cell wall of the wicker into a solution of high-concentration manganese sulfate and aniline, and enabling the aniline and manganese sulfate to move towards the interior of the wicker through the diffusion effect and even to be transferred into the cell wall; then putting the wicker into a solution containing persulfate to be saturated, carrying out oxidative coupling polymerization on aniline in an acid medium by taking persulfate as an oxidant, providing protons required by the reaction in a dilute acid environment, chemically oxidizing the aniline into polyaniline, starting the reaction to be self-accelerated after the aniline is subjected to dimerization, rapidly generating precipitates, releasing a large amount of heat in the system, and further accelerating the reaction until the reaction is terminated. The low polymer of polyaniline is soluble in water, so that the reaction is carried out in an aqueous solution initially, the high polymer of polyaniline is insoluble in water, aniline can carry out in-situ polymerization reaction in wicker cells and can play a role of inflating in cell walls for a long time, the microstructure inside the wicker becomes more compact, the strength of the wicker is further improved, through further hydrothermal reaction conditions, manganese sulfate and persulfate are oxidized to carry out chemical reaction inside the wicker to generate insoluble manganese oxide, the manganese oxide is deposited in the cell cavities or cell walls of the wicker, the toughening effect is further enhanced, formaldehyde is not released, the overall strength and toughness are obviously improved, and although the polyaniline is not easy to distort in the wicker processing process, the bending of the wicker is not influenced.
Compared with the prior art, the invention has the following advantages
In the prior art, for strengthening and toughening wickers, complex treatment steps and complex components including vacuum pressurization, steam explosion and the like are adopted, and good effects are not obtained, but a plurality of previous complex treatment modes such as impregnating resin, sol, steam explosion and the like are not adopted in the application, wicker containing aniline and manganese sulfate is impregnated, the cell cavities and cell walls of the wicker are soaked in a solution of high-concentration manganese sulfate and aniline, aniline and manganese sulfate move to the interior of the wicker through diffusion, the wicker is gradually transferred into the cell walls, a hydrothermal active reaction is carried out by impregnating aniline and manganese sulfate to generate polyaniline and manganese dioxide, a polyaniline polymerization system is used for inflating the interior of the wicker, the heat release of polyaniline polymerization is used for firstly inflating the cell walls of the wicker, manganese oxide is generated by oxidizing manganese oxide, a persulfate of a used hydrothermal activation liquid is simultaneously used as a polymerization catalyst and also used as an oxidizing agent generated by manganese oxide, stronger interface interaction force exists between a formed polymer and the wicker, the formed polymer and the wicker are used as an oxidizing agent for the hydrothermal activation liquid, the color of the polyaniline is changed, the surface of the wicker is coated with simple and visual ageing-resistant paint, the traditional method, the paint is not influenced by the traditional toughening polymer, and the traditional method, so that the wicker substrate is not easily-strengthened and the wicker, and the wicker substrate is not easily-resistant paint, and the wicker aging-resistant paint is not easily-resistant paint is obtained.
Detailed Description
Example 1
Firstly, picking up two-year-old large green-peel salix integra which has strong growth, no pest damage, no mechanical damage, good lignification and full lateral buds and has 160mm of cut branch length and 1.3cm of wide section diameter, adjusting the water content to 10 percent, the compressive strength along grain 43.2MPa, the bending strength to 71.3MPa and the impact toughness to 11.43kg/cm 2 The nail-holding power 497N, the torsional strength 12.34MPa, the cleavage resistance 20.83N/mm, the compression strength of transverse striation 4.43 and the shear strength of the longitudinal striation 3.16MPa;
secondly, peeling by flame: baking the surface of the wicker for 2 times by using a flame core part of a low-temperature alcohol lamp, and removing the outer skin on the surface of the wicker by using a bamboo clamp; secondly, dipping: dipping the peeled wickers in 1.5mol/L diluted acid, wherein the bath ratio is 1: 5, the dipping temperature is 30 ℃, the diluted acid contains 8% of aniline by mass and 6.7% of manganese sulfate by mass, and the dipping time is 24h; secondly, washing and drying: washing the surface of the wicker with clear water until the surface of the wicker is free of light pink liquid, and drying the wicker at 60 ℃ until the water content is 9%; secondly, hydrothermal treatment: putting a potassium persulfate solution hydrothermal activation solution with the composition of 30 mass percent and the pH value of 4.3 into a reaction kettlePutting the dried wicker into a reaction kettle, standing for 2 hours at 30 ℃, and then heating for hydrothermal reaction for 16 hours at 256kPa and 140 ℃; secondly, cleaning: washing the wicker obtained in the step with ethanol for 3 times, and washing with clear water for 12 times; secondly, drying: coating the surface of the wicker with a process paint, naturally drying in the air, raising the temperature in an oven to 50 ℃, and drying until the water content of the wicker is 5 percent, wherein the process paint is a uniform mixture of bone glue solution and raw lacquer in a mass ratio of 1.5: 3, and the coating amount is 100g/m 2 The Yibin Lindun ecological primary raw paint in Sichuan and bone glue from Haoyuan animal glue factory in Gaozhou can obtain the raw paint with the water content of 9 percent, the pressure resistance along the grain of 57.9MPa, the bending strength of 83.4MPa and the impact toughness of 12.56kg/cm 2 The nail-holding power is 587N, the torsional strength is 14.68MPa, the cleavage resistance is 23.97N/mm, the transverse grain compressive strength is 4.56MPa, and the longitudinal grain shear strength is 3.46 MPa.
Example 2
Firstly, harvesting Daphne davidii Dahurian of Fuyang Funan Huang Gongzhen, which grows robustly, has no pest damage, no mechanical damage and good lignification, cutting off 160mm branches of a ten-year-old weeping willow with plump lateral buds, adjusting the diameter of a wide section to be 1.4cm to have the water content of 9 percent, and adjusting the pressure strength to 41.4MPa, the bending strength to 70.11MPa and the impact toughness to 10.93kg/cm 2 The nail-holding power 514N, the torsional strength 12.26MPa, the cleavage resistance 20.35N/mm, the cross grain compressive strength 4.34MPa and the grain shear strength 3.21MPa, and the first step of flame peeling comprises the following steps: baking the surface of the wicker for 1 time by using a flame core part of a low-temperature alcohol lamp to remove the outer skin on the surface of the wicker; 2. dipping: soaking peeled wickers in 1mol/L diluted acid, wherein the bath ratio is 1: 4, the soaking temperature is 25 ℃, the diluted acid contains 5% of aniline and 4.4% of manganese sulfate, and the soaking time is 16h; 3. washing and drying: washing the surfaces of the wickers obtained in the step two by using clear water until the surfaces of the wickers are free of light pink liquid, and drying the wickers at 50 ℃ until the water content is 5%; 4. hydrothermal treatment: putting a potassium persulfate solution hydrothermal activation solution with the mass fraction of 25% and the pH value of 4.3 into a reaction kettle, putting dried wickers into the reaction kettle, standing for 1h at 25 ℃, and then heating for hydrothermal reaction for 12 h at the temperature of 232kPa140 ℃; 5. cleaning: washing the wicker obtained in the step four with ethanol for 1 time, and washing the wicker with clear water for 1 time; 6. and (3) drying: coating paint on the surface of wicker, naturally drying, and bakingRaising the temperature in the oven to 45 ℃, drying until the water content of the wicker is 7.5 percent, wherein the method paint is a uniform mixture of bone glue solution and raw paint according to the mass ratio of 1: 2, the ecological first-grade raw paint of Sichuan Yibin Lingdong, the bone glue of Haoyuan animal glue factory in Gaozhou city, and the coating amount is 80g/m 2 。
The product has water content of 7.8%, pressure strength along grain of 63.7MPa, bending strength of 89.8MPa, and impact toughness of 12.21kg/cm 2 The nail-holding power is 602N, the torsional strength is 14.21MPa, the cleavage resistance is 23.42N/mm, the compression strength of transverse striation is 4.67MPa, and the shear strength of the longitudinal striation is 4.1MPa.
Note: the detection is carried out by referring to the mechanical property test and comparative study of 'GaoJING, zhang Xiaoyan, lu Guo Xin, liyuling, jingtiaojiu' recorded mechanical property test method [ J ]. Forestry practical technology, 2012 (11): 103-106 ].
Claims (3)
1. A processing method for tenaciously woven wickers is characterized by comprising the following steps:
(1) Peeling with flame: baking the surface of the wicker for 1 to 2 times by using a flame core part of a low-temperature alcohol lamp to remove the outer skin on the surface of the wicker; (2) dipping: soaking the peeled wicker in 1 to 1.5mol/L diluted acid, wherein the bath ratio is 1: 4 to 5, the soaking temperature is 25 to 30 ℃, the diluted acid contains 5 to 8 percent of aniline and 4.4 to 6.7 percent of manganese sulfate, and the soaking time is 16 to 24h; (3) washing and drying: washing the surface of the wicker with clean water until the surface of the wicker is free of light pink liquid, and drying the wicker at 50 to 60 ℃ until the water content is 5 to 7 percent; (4) hydrothermal treatment: putting the hydrothermal activating solution into a reaction kettle, putting the dried wicker into the reaction kettle, standing for 1 to 2h at 25 to 30 ℃, and heating for hydrothermal reaction for 12 to 16h at 232 to 256kPa130 to 140 ℃; (5) cleaning: washing the wicker obtained in the step (4) with ethanol for 1 to 3 times, and washing with clear water for 1 to 2 times; (6) drying: coating the surface of the wicker with lacquer, and naturally drying the wicker in the air to obtain the wicker;
the diluted acid used for dipping in the step (2) is one of hydrochloric acid or sulfuric acid;
the hydrothermal activating solution in the step (4) is one of a potassium persulfate solution or an ammonium persulfate solution, the mass fraction concentration of the hydrothermal activating solution is 25-30%, and the pH value is 3.8-4.3;
the lacquer in the step (6) is a uniform mixture of a bone glue solution and raw lacquer in a mass ratio of 1-1.5: 2-3, and the coating amount is 80-100g/m 2 。
2. The processing method for the tough-woven wicker according to claim 1, wherein the drying in the step (6) is carried out until the temperature in an oven is increased to 45 to 50 ℃ and the water content of the wicker is 7.5 to 9 percent.
3. The processing method for strengthening and toughening knitted wicker according to claim 1, wherein the wicker in the step (1) is one of osier and weeping willow.
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| CN114102776A (en) * | 2021-12-03 | 2022-03-01 | 东北林业大学 | Preparation method of flame-retardant wood by in-situ polymerization of aniline |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20100184033A1 (en) * | 2008-07-16 | 2010-07-22 | West Michael D | Methods to accelerate the isolation of novel cell strains from pluripotent stem cells and cells obtained thereby |
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| CN105054001A (en) * | 2006-07-28 | 2015-11-18 | Mjn美国控股有限责任公司 | Nutritional formulations containing octenyl succinate anahydride-modified tapioca starch |
| CN101439878A (en) * | 2008-12-26 | 2009-05-27 | 桂林市孟泰矿产技术开发有限责任公司 | Method for preparing manganese sulfate by biomass self-heating reduction of low grade manganese oxide ore |
| CN105287434A (en) * | 2009-03-18 | 2016-02-03 | 赢创罗姆有限公司 | Ethanol influence-resistant controlled-release medicine composition adopting coating containing neutral vinyl polymers and excipients |
| CN101872137A (en) * | 2009-04-23 | 2010-10-27 | 株式会社理光 | Image forming method |
| CN102153747A (en) * | 2011-02-17 | 2011-08-17 | 中国科学院长春应用化学研究所 | Method for preparing hollow polyaniline microspheres |
| CN112498980A (en) * | 2020-10-22 | 2021-03-16 | 阜南阜合工艺品有限公司 | Processing technology for reducing collision and breakage possibility of wicker products in transportation process |
| CN114102776A (en) * | 2021-12-03 | 2022-03-01 | 东北林业大学 | Preparation method of flame-retardant wood by in-situ polymerization of aniline |
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Denomination of invention: A Processing Method for Strong and Tough Weaving Willow Effective date of registration: 20230608 Granted publication date: 20230217 Pledgee: Postal Savings Bank of China Limited Funan County Sub-branch Pledgor: GP TOPARTS MANUFACTURER (ANHUI) CO.,LTD. Registration number: Y2023980043238 |