CN106012050B - A kind of batch prepares the electrostatic spinning apparatus of nanofiber - Google Patents
A kind of batch prepares the electrostatic spinning apparatus of nanofiber Download PDFInfo
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- CN106012050B CN106012050B CN201610566885.0A CN201610566885A CN106012050B CN 106012050 B CN106012050 B CN 106012050B CN 201610566885 A CN201610566885 A CN 201610566885A CN 106012050 B CN106012050 B CN 106012050B
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- emission electrode
- spinning
- electrode
- chain
- nanofiber
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
Abstract
The invention discloses the electrostatic spinning apparatus that a kind of batch prepares nanofiber, including：The emission electrode of revolution, the emission electrode are cross-linked by several wires and are reticulated, and emission electrode has the spinning zone and coating area separated；Application member coats spinning solution to the emission electrode positioned at coating area；Collecting part is arranged oppositely with spinning zone；Collecting part or emission electrode external high voltage power supply.The spinning emission electrode of the present invention is cross-linked by several wires to be reticulated, it is different from the wire electrode of traditional one direction one dimensional arrangement, the reticular structure of two-dimensional arrangements can increase the spinning jet quantity in unit area, improve spinning efficiency so that Electrospun nano-fibers are more efficient.Present invention can apply to electrostatic spinnings.
Description
Technical field
The present invention relates to electrostatic spinning fields, and the electrostatic spinning apparatus of nanofiber is prepared more particularly to a kind of batch.
Background technology
Electrostatic spinning technique is a kind of technique using electrostatic field high-efficiency production of nano fibrous material, as nano material is ground
That studies carefully is brought rapidly up, and electrostatic spinning technique is increasingly becoming research hotspot.There are two types of common batch electrospinning process：When
Multi needle electrostatic spinning technique, second is that needle-less electrostatic spinning technique.Two kinds of electrospinning process respectively have its advantage and disadvantage, syringe needle quiet
It is easy to block at Electrospinning syringe needle, and not easy cleaning, be interfered with each other seriously between syringe needle, meanwhile, Multi needle electrostatic spinning
Technical costs spends high.In comparison, needle-less electrostatic spinning technique spinning electrode type is more, equipment is simple, easy to manufacture, most
It is a kind of effective means for producing nanofiber in enormous quantities it is important that generating a large amount of spinning jet.
It is the nanometer spider of Elmarco companies of Czech currently as the needle-less electrostatic spinning technique of world
（NanospiderTM）Needle-less electrostatic spinning technique, such as patent of invention CN101755079A propose a kind of utilize and coat dress
The equipment for setting batch micro operations nanofiber uses a tiny wire as spinning electrode；There are spinning effects for the equipment
The problem of rate is low, coating is uneven, solution exposure is easy to aging in air, electrodeless silk cleaning device, seriously affects manufacture and receives
The efficiency and quality of rice fiber.The nanofiber diameter of this method production is thicker.Make fast reciprocating type painting along wire simultaneously
Being uniformly distributed for spinning jet can also be stopped and interfere to a certain extent by smearing the spinning solution bringing device of movement.
Invention content
To solve the above-mentioned problems, the purpose of the present invention is to provide the electrostatic spinning dresses that a kind of batch prepares nanofiber
It sets, spinning efficiency is high.
The technical solution adopted in the present invention is：
A kind of batch prepares the electrostatic spinning apparatus of nanofiber, including：
The emission electrode of revolution, the emission electrode are cross-linked by several wires and are reticulated, and emission electrode, which has, to be divided
Every spinning zone and coating area；
Application member coats spinning solution to the emission electrode positioned at coating area；
Collecting part is arranged oppositely with spinning zone；
Collecting part or emission electrode external high voltage power supply.
As a further improvement on the present invention, it is equipped with air-flow accessory in the opposite position of spinning zone, the air-flow is auxiliary
Component is helped to be located at two oncoming lanes of spinning zone and the jet-impingement direction direction collection of air-flow accessory with collecting part
Component.
As a further improvement on the present invention, the air-flow accessory includes air-flow transmitter, the air-flow transmitter
It is evenly equipped with stomata towards the surface of collecting part.
As a further improvement on the present invention, the application member includes a liquid reserve tank, and the liquid reserve tank has a job
Liquid level, the liquid reserve tank are equipped with electrode inlet and electrode outlet, and the coating area of emission electrode is located in liquid reserve tank and is less than work
Liquid level.
As a further improvement on the present invention, the electrode inlet and electrode outlet are above work liquid level.
As a further improvement on the present invention, the emission electrode is driven by chain drive structure and is turned round, the chain drive
Structure includes chain and the otic placode that is connected on chain, and the end of the emission electrode is fixed on otic placode, turns to coating
The chain of area's corresponding position is higher than work liquid level.
As a further improvement on the present invention, there is the otic placode raffinate to keep in structure, and it is temporary that the raffinate keeps in structure
The raffinate of chain is flowed in storage spinning zone because of gravity.
As a further improvement on the present invention, the otic placode includes transition part and connects the rising portion of emission electrode, institute
Transition part connection rising portion and chain are stated, there are the transition part strip projected parts and strip to be recessed, and the strip recess is located at
Between strip projected parts and rising portion structure is kept in constitute raffinate.
As a further improvement on the present invention, the external negative high voltage power source of the collecting part, the emission electrode ground connection.
As a further improvement on the present invention, further include the cleaning component that passes through successively in turning course of emission electrode and
Component is dried, emission electrode first passes through drying component and enters back into application member.
The beneficial effects of the invention are as follows：The spinning emission electrode of the present invention is cross-linked by several wires to be reticulated, area
Not in the wire electrode of traditional one direction one dimensional arrangement, the reticular structure of two-dimensional arrangements can increase the spinning jet in unit area
Quantity improves spinning efficiency so that Electrospun nano-fibers are more efficient.
Description of the drawings
The present invention is further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is the structural schematic diagram of electrostatic spinning apparatus；
Fig. 2 is electrostatic spinning apparatus front view；
Fig. 3 is electrostatic spinning apparatus vertical view；
Fig. 4 is coating area coating procedure schematic diagram；
Fig. 5 is emission electrode and chain connection diagram.
Specific implementation mode
Batch as shown in Figure 1 to Figure 3 prepares the electrostatic spinning apparatus of nanofiber, including emission electrode 1, painting part
Part, collecting part 2, cleaning component 7, drying component 8 and high voltage power supply.
Wherein, emission electrode 1 is cross-linked by a plurality of wire 11 and reticulates structure, and forms a large amount of network,
These grids can be square, rectangle, and the spacing of the polygons such as diamond shape, adjacent, parallel metal is 10mm ~ 1000mm.Ginseng
Fig. 1 to Fig. 3 is examined, these grids preferably square, and distance 60mm, then, emission electrode 1 is crisscross by more
Wire 11 is formed by connecting, and emission electrode 1 is in long netted.
In the present embodiment, wire 11 is made using more soft material so that it can bending state and stretch shape
Switch in state.The netted emission electrode 1 can do rotary motion under the guiding of external transmission parts as a result, to
Each wire 11 can be turned round by the spinning zone 12 of emission electrode 1 and coating area successively.
The coating area is that spinning solution is evenly applied on emission electrode 1, is provided with corresponding to the position of coating area
Application member.The emission electrode 1 for being coated with spinning solution returns back to spinning zone 12 later, and is in be arranged oppositely with collecting part 2.It is high
After voltage source is electrically connected collecting part 2 or emission electrode 1, the high pressure formed between spinning zone 12 and collecting part 2 is quiet
Under the action of electric field, there are a large amount of accumulations on the solution of 12 surface of spinning zone coating, due to netted 1 surface of emission electrode
Curvature is smaller, and the solution on emission electrode 1 will form taylor cone, when the electrostatic field force that the charge density of accumulation is formed is more than to spin
When silk liquid surface molecular tension, the high speed spinning jet stream moved to collecting part 2 will be formed on emission electrode 1.
In the present embodiment, it is cross-linked webbed emission electrode 1 by several wires 11, is different from traditional one direction one
The wire electrode of arrangement is tieed up, the reticular structure of this two-dimensional arrangements can increase the spinning jet quantity in unit area, improve and spin
Silk efficiency so that Electrospun nano-fibers are more efficient.
In embodiment, cleaning component 7 and drying component 8 are respectively positioned on the rotary path of emission electrode 1, by gyratory directions
It sees, emission electrode 1 is successively by cleaning component 7, drying component 8, application member and loop back.
After the completion of spinning, there is remaining spinning solutions and spinning solution solidfied material on the wire 11 of spinning zone 12, then
The revolution of this part metals silk 11 enters cleaning component 7.With reference to figure 1 and Fig. 2, cleaning component 7 is a container, and the inside is loaded with solvable
Solve the lysate of spinning solution, and be provided in container the brush 71 of removal spinning solution solidfied material, the brush 71 of movement with go
Except the liquid collective effect of spinning solution is on the emission electrode entered inside container, remaining spinning solution thereon can be effectively removed
And its solidfied material.It cleans 7 side of component and is equipped with inlet 72 and liquid outlet 73, constantly can be replaced and cleaned solution and keep cleaning
Dynamics, and the spot after discharge cleaning in time.
It includes a drying box, heating device and exhaust system to dry component 8, and heating device and exhaust system are respectively positioned on drying
In case or drying box surface, and drying box right side and left side are respectively the entrance and exit of emission electrode 1.Emission electrode 1 passes through
Cleaning component 7 can return back in drying box after cleaning, to accelerate the volatilization and removing of emission electrode surface lysate, it is ensured that metal
Silk table face residual solution thoroughly removes.The heating device accelerates the volatilization of residual lysate, and exhaust system is by volatilization
Solution absorbs externally discharged purifier, it is ensured that radio pole surface lysate thoroughly removes.
By cleaning, drying emission electrode 1, it is possible to reduce the waste of electrode material and the continuity for improving production and processing.
It is further preferred that the opposite position in spinning zone 12 is equipped with air-flow accessory.Air-flow accessory and collection
Component 2 is located at the jet-impingement direction of two oncoming lanes of spinning zone 12 and air-flow accessory towards collecting part 2.Such as figure
Shown in 1 and Fig. 2, air-flow accessory is located at the underface of spinning zone 12, and collecting part 2 is located at the surface of spinning zone 12.It should
Air-flow accessory includes the air-flow transmitter 31 in box-like, and air-flow transmitter 31 has been evenly distributed in the upper surface stomata 32, air-flow
Transmitter 31 outside tracheae 33 by being connected on gas generator part 34.
Referring to figs. 1 to Fig. 3, the process that 1 spinning jet of emission electrode is moved to collecting part 2 is divided to two shapes：Initial rank
The linear motion of section is moved with spiral divergent cone.Under linear motion state, jet stream is assisted in the direction of motion plus quick flow,
The movement velocity of spinning jet is accelerated, and in the case of same stroke, run duration is reduced；And because effluxvelocity adds
Soon, the range of coning motion reduces, and spinning jet is more concentrated and is deposited on base material, and the stability control of jet stream is improved.
Secondly, it will be pulled force effect simultaneously by the spinning jet of gas auxiliary, in the force action of air draft force and electric field force
Under, the vector resultant force of the direction of motion will be enhanced, and increased resultant force will make fibre diameter stretching attenuate；Further, it assists
Air-flow can effectively improve the evaporation rate of solution, accelerate the drying of spinning fibre.
It is further preferred that with reference to figure 1, Fig. 2 and Fig. 4, the application member includes the liquid reserve tank of a loading spinning solution
4, there is liquid reserve tank 4 a work liquid level 43, in general spinning solution to be held in work liquid level 43.Liquid reserve tank 4 is made relatively
Closed is provided only with the electrode inlet 41 to come in and go out for emission electrode 1 and electrode outlet 42, to reduce the volatilization of spinning solution,
Ensure the stability of concentration of spinning solution to greatest extent and prevents reservoir exposure from solution being caused to go bad aging in air.In addition,
Coating area 13 is located in liquid reserve tank 4 and is less than work liquid level 43, ensures that coating area 13 can be immersed in liquid level hereinafter, ensureing coating
It is uniform.There are spinning solution entrance 45 and overflow port 44 on liquid reserve tank 4.In spinning solution consumption process, preparation of spinning solution device connects
It connects spinning solution entrance 45 and persistently supplements spinning into liquid reserve tank 4.When spinning solution injection rate is excessive, overflow port 44 is by excessive spinning
Liquid is recycled to preparation of spinning solution device, realizes the dynamic equilibrium of liquid reserve tank 4 circulating feeding liquid and feed flow.
In embodiment, electrode inlet 41 and electrode outlet 42 are above work liquid level 43, and spinning solution will not leak due to its.
Preferred electrode inlet 41 and electrode outlet 42 are located at 4 top of liquid reserve tank, movement locus of the emission electrode 1 at 4 top of liquid reserve tank
To lack the rectangle on side.
Application member and coating method in embodiment can be different from conventional reciprocating movement coating unit feed flow, traditional skill
The mode of coating block assembly feed flow is moved back and forth in art, distance is crossed senior general and caused between coating unit fluid hole and spinning electrode
The leakage of spinning solution, and cause fluid hole to generate friction with spinning electrode apart from small and spinning electrode silk bending, spinning solution applies
Cover unevenness.The application member used in the present embodiment, emission electrode 1 after masking liquid is not in the process of running with any coating block etc.
Object contacts and destroys spinning solution surface, and spinning solution is evenly distributed under self gravitation effect on emission electrode 1, ensures spinning
The uniformity of process.
It is further preferred that emission electrode 1 is driven by chain drive structure and is turned round.Referring to figs. 1 to Fig. 5, the chain passes
Dynamic structure includes chain 5, sprocket wheel and the otic placode 51 being connected on chain 5, is respectively provided with described in one piece on each chain link of chain 5
Otic placode 51.The end of the emission electrode 1 is fixed on otic placode 51, when chain 5 drives emission electrode 1 to turn to coating area
When 13, wire 11 is located at 5 lower section of chain, and chain 5 is higher than work liquid level 43 without contacting spinning solution, therefore, the profit of chain 5
Synovia will not contact spinning solution and occur mutually to pollute.
Since on the position of coating area 13, chain 5 is above wire 11, thus when chain 5 returns back to spinning zone
When 12 corresponding position, chain 5 will be less than wire 11, in order to avoid spinning solution slides downwards because of the reason of gravity to chain
In item 5, raffinate is set on otic placode 51 and keeps in structure, the temporary structure of raffinate temporarily stores in spinning zone 12 flows to chain because of gravity
The raffinate of item 5.
Specifically, with reference to figure 5, otic placode 51 includes transition part and connects the rising portion 511 of emission electrode 1.Wire
11 are plugged in the hole of rising portion 511, and transition part connection rising portion 511 and chain 5, and in Figure 5, rising portion 511 is equal to
" to increase " to emission electrode 1, to when emission electrode 1 as shown in Figure 4 be in coating state, the part of rising portion 511 with
Emission electrode 1 contacts spinning solution and chain 5 does not contact spinning solution.Referring again to Fig. 5, transition part has strip projected parts 513, strip
Recess 514 and interconnecting piece 512, interconnecting piece 512 are connected with the chain link of chain 5, and 513 chain link of strip projected parts is on interconnecting piece 512, item
Shape recess 514 is between strip projected parts 513 and rising portion 511, then strip projected parts 513 and strip recess 514 constitute one
The structure of a substantially " S " type, when in state shown in fig. 5, the spinning solution on emission electrode 1 is flow to because of gravity to be holded up
In portion 511, strip recess 514 is flowed to along rising portion 511 later, strip recess 514 is relative to rising portion 511 and strip projected parts
It is recess for 513, is stored temporarily in strip recess 514 then spinning solution just returns without polluting chain 5.Above-mentioned mistake
The portion of crossing constitutes the raffinate in embodiment and keeps in structure.
Have the advantages that at least two by above-described chain 5, otic placode 51 and the connection structure of emission electrode 1：First,
Emission electrode can be completely submerged in spinning solution, and ensure that chain 5 is not infected with spinning solution, keep lubricating fluid and spinning on chain 5
Silk liquid does not pollute mutually；Second, the operation of otic placode 51 to solution when 12 corresponding position of spinning zone will flow downward, strip recess 514
Can prevent solution from flowing on chain 5, protection chains 5 it is clean.
It is further preferred that with reference to figure 1 and Fig. 2,2 external negative high voltage power source 6 of collecting part, emission electrode 1 is grounded.
In general, electrostatic spinning may be used positive high voltage DC power supply and provide high-pressure electrostatic with negative high voltage DC power supply,
There are two types of common high-voltage electrostatic field embodiments：Positive high voltage DC power supply electrode and ground connection zero potential electrode, negative high voltage direct current
Low potential is directed toward by high potential with ground connection zero potential electrode, electric field force direction in source.Therefore there are two types of meet electricity side with emission electrode 1
Formula：One is positive high voltage DC power supply is connect, another kind is ground connection.In the present embodiment, positive high voltage DC power supply cannot be used to connect
The reason of emission electrode 1 is：The front and back dresses such as with chain 5, sprocket wheel, lysate, drying box, liquid reserve tank 4 of emission electrode 1 with high pressure
It sets connected, will increase electrical source consumption power, and high-pressure electrostatic is easily damaged connected Charging system, such as drive brush fortune
Blender etc. in dynamic motor, drying box, the motor of drive chain movement, preparation of spinning solution device；Conversely, by high-pressure electrostatic
Polarized device will influence the electric field line distribution of spinning zone, and electric field strong and weak is uneven, irregular to follow, the mutual shadow of the two electric field
It rings.
It is electrical connected with collecting part 2 using negative high voltage power source 6 in embodiment, emission electrode 1 is grounded, with emission electrode 1
The device feature being connected directly equally is grounded zero potential, noiseless to electric field.Meanwhile negative high voltage DC power supply can simple realization with
Collecting part 2 is connected.
With reference to figure 1 and Fig. 2, the collecting part 2 in embodiment includes passive electrode 21, is in passive electrode 21 and transmitting electricity
Base material 9 between pole 1 will collect spinning fibre and fit together with passive electrode 21.Passive electrode 21 can not with base material 9
Contact can also contact, and passive electrode 21 is connected with negative high voltage power source 6, makes to be formed between passive electrode 1 and emission electrode 1
High-voltage electrostatic field.The Scroll 100 driven by driving motor batches base material, and unreeling shaft 101 provides base material 9 and unreels.
The above is the preferred embodiment of the present invention, does not constitute limiting the scope of the invention.
Claims (7)
1. a kind of batch prepares the electrostatic spinning apparatus of nanofiber, which is characterized in that including：
The emission electrode (1) of revolution, the emission electrode (1) is cross-linked by several wires (11) to be reticulated, emission electrode
(1) there are the spinning zone (12) separated and coating area (13)；
Application member, the emission electrode (1) to being located at coating area (13) coat spinning solution；
Collecting part (2) is arranged oppositely with spinning zone (12)；
Collecting part (2) or emission electrode (1) external high voltage power supply；
The application member includes a liquid reserve tank (4), and the liquid reserve tank (4) has a work liquid level (43), the liquid reserve tank (4)
Equipped with electrode inlet (41) and electrode outlet (42), the coating area (13) of emission electrode (1) is located in liquid reserve tank (4) and is less than work
Make liquid level (43), the emission electrode (1) is driven by chain drive structure and is turned round, the chain drive structure include chain (5) with
And it is connected to the otic placode (51) on chain (5), the end of the emission electrode (1) is fixed on otic placode (51), turns to coating
The chain (5) of area (13) corresponding position is higher than work liquid level (43), and there is the otic placode (51) raffinate to keep in structure, the raffinate
Temporary structure temporarily stores the raffinate for flowing to chain (5) in spinning zone (12) because of gravity.
2. batch according to claim 1 prepares the electrostatic spinning apparatus of nanofiber, it is characterised in that：In spinning zone
(12) opposite position is equipped with air-flow accessory, and the air-flow accessory is located at spinning zone with collecting part (2)
(12) the jet-impingement direction of two oncoming lanes and air-flow accessory is towards collecting part (2).
3. batch according to claim 2 prepares the electrostatic spinning apparatus of nanofiber, it is characterised in that：The air-flow is auxiliary
It includes air-flow transmitter (31) to help component, and the surface of air-flow transmitter (31) towards the collecting part (2) is evenly equipped with stomata
(32)。
4. batch according to claim 1 prepares the electrostatic spinning apparatus of nanofiber, it is characterised in that：The electrode enters
Mouth (41) and electrode outlet (42) are above work liquid level (43).
5. batch according to claim 1 prepares the electrostatic spinning apparatus of nanofiber, it is characterised in that：The otic placode
(51) include transition part and connection emission electrode (1) rising portion (511), transition part connection rising portion (511) and
There are strip projected parts (513) and strip recess (514), the strip recess (514) to be located at strip for chain (5), the transition part
Between raised (513) and rising portion (511) structure is kept in constitute raffinate.
6. batch according to any one of claim 1 to 5 prepares the electrostatic spinning apparatus of nanofiber, feature exists
In：The external negative high voltage power source of the collecting part (2) (6), emission electrode (1) ground connection.
7. batch according to any one of claim 1 to 5 prepares the electrostatic spinning apparatus of nanofiber, feature exists
In：Further include the cleaning component (7) and drying component (8) that emission electrode (1) passes through successively in turning course, emission electrode
(1) it first passes through drying component (8) and enters back into application member.
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| CN201610566885.0A CN106012050B (en) | 2016-07-15 | 2016-07-15 | A kind of batch prepares the electrostatic spinning apparatus of nanofiber |
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| CN201610566885.0A CN106012050B (en) | 2016-07-15 | 2016-07-15 | A kind of batch prepares the electrostatic spinning apparatus of nanofiber |
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| CN106012050B true CN106012050B (en) | 2018-08-31 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106835302A (en) * | 2017-01-12 | 2017-06-13 | 浙江理工大学 | Continuous electrostatic spinning device |
| CN109695063A (en) * | 2019-01-31 | 2019-04-30 | 吉林农业大学 | A kind of needle-free electrostatic spinning apparatus |
| CN110373728A (en) * | 2019-07-03 | 2019-10-25 | 东华大学 | A kind of blade type electrostatic spinning apparatus and application method |
| CN110983457B (en) * | 2019-12-25 | 2023-08-29 | 北京化工大学 | Sawtooth type electrostatic spinning device and method capable of periodically changing electric field |
| CN112301439A (en) * | 2020-11-19 | 2021-02-02 | 上海第二工业大学 | Nanofiber electrostatic spinning equipment |
| CN113862798B (en) * | 2021-09-28 | 2023-03-31 | 昆承新材料科技(江苏)有限公司 | Electrostatic spinning emitter |
| CN114481341B (en) * | 2022-03-24 | 2023-03-24 | 河南中纤新材料科技有限公司 | Spray head for linear electrode solution electrostatic spinning and use method thereof |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH570493A5 (en) * | 1973-08-16 | 1975-12-15 | Battelle Memorial Institute | |
| DE10136255B4 (en) * | 2001-07-25 | 2005-05-04 | Helsa-Werke Helmut Sandler Gmbh & Co. Kg | Device for producing fibers with improved arrangement of the spray electrodes |
| CN203474970U (en) * | 2013-09-23 | 2014-03-12 | 北京化工大学 | Metal mesh belt type melt electrostatic spinning device |
| CN104775169B (en) * | 2015-04-08 | 2017-02-01 | 刘千祥 | Synchronous circulation type spiral sealing belt device for electrostatic spinning |
| CN205152411U (en) * | 2015-10-16 | 2016-04-13 | 林佳弘 | Axis of rotation |
| CN105568409B (en) * | 2016-01-29 | 2017-11-14 | 佛山轻子精密测控技术有限公司 | A kind of method of electrospun nanofibers |
| CN105755555B (en) * | 2016-04-19 | 2018-04-17 | 佛山轻子精密测控技术有限公司 | A kind of electrostatic spinning electrode and batch prepare the device of nanofiber |
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Denomination of invention: Electrostatic spinning device for preparing nanofibers in batches Effective date of registration: 20200408 Granted publication date: 20180831 Pledgee: Guangdong Nanhai Rural Commercial Bank branch branch of Limited by Share Ltd. Pledgor: FOSHAN QINGZI PRECISION MEASUREMENT AND CONTROL TECHNOLOGY Co.,Ltd. Registration number: Y2020980001334 |
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Date of cancellation: 20230412 Granted publication date: 20180831 Pledgee: Guangdong Nanhai Rural Commercial Bank branch branch of Limited by Share Ltd. Pledgor: FOSHAN QINGZI PRECISION MEASUREMENT AND CONTROL TECHNOLOGY Co.,Ltd. Registration number: Y2020980001334 |
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