CN112606287A - Polyimide curtain coating membrane drying equipment - Google Patents
Polyimide curtain coating membrane drying equipment Download PDFInfo
- Publication number
- CN112606287A CN112606287A CN202011147220.9A CN202011147220A CN112606287A CN 112606287 A CN112606287 A CN 112606287A CN 202011147220 A CN202011147220 A CN 202011147220A CN 112606287 A CN112606287 A CN 112606287A
- Authority
- CN
- China
- Prior art keywords
- power chamber
- chain
- power
- cast film
- conveying roller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000001035 drying Methods 0.000 title claims abstract description 52
- 229920001721 polyimide Polymers 0.000 title claims abstract description 21
- 239000004642 Polyimide Substances 0.000 title claims abstract description 18
- 239000012528 membrane Substances 0.000 title description 3
- 238000007766 curtain coating Methods 0.000 title description 2
- 230000008676 import Effects 0.000 claims abstract description 11
- 238000001179 sorption measurement Methods 0.000 claims description 26
- 239000000428 dust Substances 0.000 claims description 20
- 239000003463 adsorbent Substances 0.000 claims description 8
- 230000003068 static effect Effects 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 7
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 241001417527 Pempheridae Species 0.000 claims 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 16
- 229910052742 iron Inorganic materials 0.000 description 8
- 238000010408 sweeping Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920005575 poly(amic acid) Polymers 0.000 description 2
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
- B29C37/0092—Drying moulded articles or half products, e.g. preforms, during or after moulding or cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/02—Plant or installations having external electricity supply
- B03C3/04—Plant or installations having external electricity supply dry type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B15/02—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using chambers or hoods covering the area
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G45/00—Lubricating, cleaning, or clearing devices
- B65G45/10—Cleaning devices
- B65G45/18—Cleaning devices comprising brushes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2079/00—Use of polymers having nitrogen, with or without oxygen or carbon only, in the main chain, not provided for in groups B29K2061/00 - B29K2077/00, as moulding material
- B29K2079/08—PI, i.e. polyimides or derivatives thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2007/00—Flat articles, e.g. films or sheets
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention provides a polyimide cast film drying device, which comprises: the drying cabinet that has import and export and the transfer chain that is located the inside drying cabinet, the transfer chain includes the transfer roller that arranges side by side, installs sprocket and chain and power unit at the transfer roller both ends to its export orientation by the import of drying cabinet, wherein: a first power chamber and a second power chamber which are oppositely arranged at two sides of the arrangement direction of the conveying rollers are arranged in the drying box; one end of the conveying roller penetrates through the side wall of the first power chamber to extend into the first power chamber, a first rotary dynamic seal is arranged at the joint of the conveying roller and the first power chamber, the other end of the conveying roller penetrates through the side wall of the second power chamber to extend into the second power chamber, and a second rotary dynamic seal is arranged at the joint of the conveying roller and the second power chamber; the chain wheel and the chain which are arranged at one end of the conveying roller are positioned in the first power chamber, and the chain wheel and the chain which are arranged at the other end of the conveying roller are positioned in the second power chamber. The invention can effectively avoid the problem of film pollution.
Description
Technical Field
The invention relates to the technical field of cast film drying equipment, in particular to polyimide cast film drying equipment.
Background
The polyimide film is a film made of an organic high polymer material, has outstanding high temperature resistance, radiation resistance, chemical corrosion resistance and electrical insulation performance, is suitable for being used as a base material of a flexible printed circuit board and various high temperature resistant electrical and electrical appliance insulation materials, is widely used in the fields of aviation, aerospace, electronics, liquid crystal and the like, and is produced by two steps, wherein the first step is used for synthesizing a polyamic acid solution, and the second step is used for casting, stretching, imidizing and rolling the polyamic acid solution to prepare the polyimide film. Polyimide film need be to its drying in the course of making, need carry out the conveying in the dry, however because in data send process, chain and sprocket can be in operation in-process unavoidably because of the friction produces a large amount of iron fillings and raise dust, and the iron fillings and the raise dust that produce can fall on its film that conveys, and then cause the film pollution.
Disclosure of Invention
In order to solve the technical problems in the background art, the invention provides polyimide casting film drying equipment.
The invention provides a polyimide cast film drying device, which comprises: the drying cabinet that has import and export and the transfer chain that is located the drying cabinet inside and carries out the conveying to its export direction by the import of drying cabinet, the transfer chain includes the transfer roller that is arranged side by side to its export direction by the import of drying cabinet, installs sprocket and the chain at transfer roller both ends and drives each transfer roller synchronous rotation's power unit through the chain, wherein:
a first power chamber and a second power chamber which are oppositely arranged at two sides of the arrangement direction of the conveying rollers are arranged in the drying box;
one end of the conveying roller penetrates through the side wall of the first power chamber to extend into the first power chamber, a first rotary dynamic seal is arranged at the joint of the conveying roller and the first power chamber, the other end of the conveying roller penetrates through the side wall of the second power chamber to extend into the second power chamber, and a second rotary dynamic seal is arranged at the joint of the conveying roller and the second power chamber;
the chain wheel and the chain which are arranged at one end of the conveying roller are positioned in the first power chamber, and the chain wheel and the chain which are arranged at the other end of the conveying roller are positioned in the second power chamber.
Preferably, the first power chamber and the second power chamber are provided with air inlets communicated with the outside, air passages connected with vacuumizing devices are respectively arranged below the first power chamber and the second power chamber, and air outlets communicated with the first power chamber and the air passages below the second power chamber are respectively arranged between the first power chamber and the air passages below the first power chamber and between the second power chamber and the air passages below the second power chamber.
Preferably, the exhaust port is provided in plurality, and the exhaust ports are arranged one-to-one under the sprockets.
Preferably, the exhaust port is a bell mouth with an upward flaring.
Preferably, a first dust sweeping brush in contact with the chain is arranged in the first power chamber and at one end, close to the outlet of the drying box, of the chain.
Preferably, the first dust brush includes a base and bristles installed on the base and contacting the chain and charged with static electricity.
Preferably, a second dust sweeping brush which is in contact with the chain is arranged in the second power chamber and is positioned at one end of the chain close to the outlet of the drying box.
Preferably, the second dust brush includes a base and bristles installed on the base and contacting the chain and charged with static electricity.
Preferably, the first power chamber and the second power chamber are both provided with an electrostatic adsorption structure inside.
Preferably, the first power chamber and the second power chamber are both provided with a driving mechanism for driving the internal electrostatic adsorption structure to shake.
Preferably, the drive mechanism comprises a vibration table on which the electrostatic adsorption structure is mounted.
Preferably, the electrostatic adsorption structure comprises an adsorbent with static electricity and a controller for controlling the on-off of the adsorbent and a power supply.
Preferably, the adsorption body comprises an outer frame and an electrostatic adsorption film or an electrostatic adsorption net which is positioned inside the outer frame and the outer edge of which is fixed with the outer frame.
In the invention, the first power chamber and the second power chamber are arranged in the drying box, and the chain wheels and the chains at the two ends of the conveying roller are respectively positioned in the first power chamber and the second power chamber, so that scrap iron and dust caused by the friction between the chain wheels and the chains during conveying are sealed in the corresponding power chambers, thereby effectively avoiding the problem of film pollution.
Drawings
FIG. 1 is a schematic structural diagram of a polyimide cast film drying apparatus according to the present invention.
Fig. 2 is a partial enlarged view of S in fig. 1.
Fig. 3 is a partial enlarged view of fig. 1 at K.
Detailed Description
Referring to fig. 1 to 3, a polyimide cast film drying apparatus according to the present invention includes: drying cabinet 1 with import and export and be located drying cabinet 1 inside and carry out the transfer chain that conveys to its export direction by the import of drying cabinet 1, the transfer chain includes the transfer roller 9 that arranges side by side to its export direction by the import of drying cabinet 1, installs at the sprocket 2 at transfer roller 9 both ends and the chain 3 of connecting sprocket 2 and drive each transfer roller 9 synchronous rotation's power unit through chain 3, wherein: the drying cabinet 1 is internally provided with a first power chamber and a second power chamber which are oppositely arranged at two sides of the arrangement direction of the conveying rollers 9.
One end of the conveying roller 9 penetrates through the side wall of the first power chamber to extend into the first power chamber and is provided with a first rotary dynamic seal at the joint with the first power chamber, and the other end of the conveying roller 9 penetrates through the side wall of the second power chamber to extend into the second power chamber and is provided with a second rotary dynamic seal at the joint with the second power chamber, so that the first power chamber and the second power chamber are isolated from the inner space of the drying box 1. Install sprocket 2 and chain 3 in the 9 one ends of transfer roller and be located first power indoor, install sprocket 2 and chain 3 at the 9 other ends of transfer roller and be located the second power indoor to make sprocket 2 and 3 frictions of chain produce iron fillings and raise dust can not get into in the 1 inner space of drying cabinet.
Therefore, the drying oven can effectively avoid the problem of film pollution by arranging the first power chamber and the second power chamber in the drying oven 1 and respectively positioning the chain wheel 2 and the chain 3 at the two ends of the conveying roller 9 in the first power chamber and the second power chamber to seal the scrap iron and the raised dust caused by the conveying friction between the chain wheel 2 and the chain 3 in the corresponding power chambers.
In addition, in this embodiment, the first power chamber and the second power chamber both have air inlets a communicated with the outside, air passages 4 connected with a vacuum extractor are respectively arranged below the first power chamber and the second power chamber, and air outlets b communicated with the first power chamber and the air passages 4 below the second power chamber are respectively arranged between the first power chamber and the air passages 4 below the first power chamber. First power room and second power room can be respectively by the evacuating device who corresponds carry out the evacuation processing, and the setting of this structure both can carry out centralized processing to iron fillings and raise dust in first power room and the second power room, avoids iron fillings too much to accelerate 2 wearing and tearing of sprocket, because of the air inlet an of first power room and second power room all communicates with the external world of drying cabinet 1 again, and then can avoid causing the inside nitrogen loss of drying cabinet 1 again.
In this embodiment, gas vent b is flaring up's bellmouth, and gas vent b is equipped with a plurality ofly, and each gas vent b one-to-one arranges in the below of each sprocket 2 to carry out fixed point and adsorb, reinforcing adsorption effect.
In this embodiment, a first dust brush contacting the chain 3 is disposed at one end of the chain 3 near the outlet of the drying box 1 in the first power chamber. And a second dust sweeping brush which is contacted with the chain 3 is arranged in the second power chamber and is positioned at one end of the chain 3 close to the outlet of the drying box 1, so that the first dust sweeping brush and the second dust sweeping brush are utilized to sweep the chains 3 at two ends of the conveying roller 9 respectively. And the first dust brush and the second dust brush in this embodiment both include base member 5 and install on base member 5 and with the contact of chain 3 and the brush hair 6 that has static to carry out electrostatic absorption in sweeping the dirt, raise dust appears when avoiding the brush.
In this embodiment, the first power chamber and the second power chamber are both provided with an electrostatic adsorption structure 7, and the electrostatic adsorption structure 7 includes an adsorbent with static electricity and a controller for controlling on/off of the adsorbent and a power supply. The adsorbent includes the outline and is located the inboard and outward flange of outline and the fixed electrostatic adsorption membrane or the electrostatic adsorption net of outer frame body, and electrostatic adsorption structure 7's structure setting can effectively strengthen the adsorption effect to the iron cut to reduce the raise dust rate. And still set up actuating mechanism 8 respectively in first power room and second power room in this embodiment, actuating mechanism 8 includes the shaking table, the adsorbent among the electrostatic adsorption structure 7 is installed on the shaking table, when equipment is out of work, can carry out periodic cleaning to electrostatic adsorption structure 7, and specific clearance mode is: the power supply of the electrostatic adsorption structure 7 is disconnected in advance, the vacuum-pumping device is kept in a vacuum-pumping working state, the driving mechanism 8 is started, the driving mechanism 8 is used for driving the adsorption body to shake so as to adsorb and shake off the adsorption body, and the shaken off waste materials are pumped out by the vacuum-pumping device.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. A polyimide cast film drying apparatus, characterized by comprising: drying cabinet (1) with import and export and the transfer chain that is located inside drying cabinet (1) and carries out the conveying to its export direction by the import of drying cabinet (1), the transfer chain includes transfer roller (9) that the import by drying cabinet (1) arranged side by side to its export direction, install sprocket (2) and chain (3) at transfer roller (9) both ends and drive each transfer roller (9) synchronous rotation's power unit through chain (3), wherein:
a first power chamber and a second power chamber which are oppositely arranged at two sides of the arrangement direction of the conveying rollers (9) are arranged in the drying box (1);
one end of the conveying roller (9) penetrates through the side wall of the first power chamber to extend into the first power chamber, a first rotary dynamic seal is arranged at the joint of the conveying roller and the first power chamber, the other end of the conveying roller (9) penetrates through the side wall of the second power chamber to extend into the second power chamber, and a second rotary dynamic seal is arranged at the joint of the conveying roller and the second power chamber;
the chain wheel (2) and the chain (3) which are arranged at one end of the conveying roller (9) are positioned in the first power chamber, and the chain wheel (2) and the chain (3) which are arranged at the other end of the conveying roller (9) are positioned in the second power chamber.
2. The polyimide cast film drying apparatus according to claim 1, wherein each of the first power chamber and the second power chamber has an air inlet (a) communicating with the outside, air passages (4) connected with a vacuum extractor are provided below each of the first power chamber and the second power chamber, and exhaust ports (b) communicating the first power chamber and the air passage (4) located below the second power chamber are provided between the second power chamber and the air passage (4) located below the second power chamber.
3. The polyimide cast film drying apparatus according to claim 2, wherein the exhaust port (b) is provided in plurality, and each exhaust port (b) is arranged below each sprocket (2) in one-to-one correspondence.
4. The polyimide cast film drying apparatus according to claim 2, wherein the exhaust port (b) is a bell mouth with a flare directed upward.
5. The polyimide cast film drying apparatus according to claim 1, wherein a first dust brush in contact with the chain (3) is provided in the first power chamber at one end of the chain (3) near the outlet of the drying box (1); preferably, the first sweeper brush comprises a base body (5) and bristles (6) which are arranged on the base body (5), are in contact with the chain (3) and are charged with static electricity.
6. The polyimide cast film drying apparatus according to claim 1, wherein a second dust brush in contact with the chain (3) is provided in the second power chamber at one end of the chain (3) near the outlet of the drying box (1); preferably, the second sweeper brush comprises a base body (5) and bristles (6) which are arranged on the base body (5), are in contact with the chain (3) and are charged with static electricity.
7. Polyimide cast film drying apparatus according to any of claims 1 to 6, wherein the inside of each of the first and second power chambers is provided with an electrostatic adsorption structure (7).
8. The polyimide cast film drying apparatus according to claim 7, wherein the first power chamber and the second power chamber are each provided with a driving mechanism (8) for shaking the electrostatic adsorption structure (7) therein.
9. The polyimide cast film drying apparatus according to claim 8, wherein the driving mechanism (8) includes a vibrating table on which the electrostatic adsorption structure (7) is mounted.
10. The polyimide cast film drying apparatus according to claim 7, wherein the electrostatic adsorption structure (7) includes an adsorbent with static electricity and a controller for controlling on/off of the adsorbent and a power supply; preferably, the adsorption body comprises an outer frame and an electrostatic adsorption film or an electrostatic adsorption net which is positioned inside the outer frame and the outer edge of which is fixed with the outer frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011147220.9A CN112606287B (en) | 2020-10-23 | 2020-10-23 | Polyimide curtain coating membrane drying equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011147220.9A CN112606287B (en) | 2020-10-23 | 2020-10-23 | Polyimide curtain coating membrane drying equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112606287A true CN112606287A (en) | 2021-04-06 |
| CN112606287B CN112606287B (en) | 2022-06-07 |
Family
ID=75225831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011147220.9A Active CN112606287B (en) | 2020-10-23 | 2020-10-23 | Polyimide curtain coating membrane drying equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112606287B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0397858A (en) * | 1989-09-11 | 1991-04-23 | Shin Meiwa Ind Co Ltd | Vacuum treating apparatus |
| CN101648649A (en) * | 2009-09-03 | 2010-02-17 | 东莞宏威数码机械有限公司 | Vacuum basal plate transmitting system |
| CN202028472U (en) * | 2011-02-21 | 2011-11-09 | 浙江菲达环保科技股份有限公司 | Rotary anode type electrostatic precipitator |
| CN207592305U (en) * | 2017-11-21 | 2018-07-10 | 苏州盟特方立电子有限公司 | A kind of washer for aluminium foil class formation |
| CN208843784U (en) * | 2018-08-12 | 2019-05-10 | 上海合毓模具技术有限公司 | A kind of die steel cutting scrap adsorption recovery slot |
| CN209009524U (en) * | 2018-09-25 | 2019-06-21 | 河南中烟工业有限责任公司 | A kind of cleaning cigarette strip transporting chain plate dust-extraction unit |
-
2020
- 2020-10-23 CN CN202011147220.9A patent/CN112606287B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0397858A (en) * | 1989-09-11 | 1991-04-23 | Shin Meiwa Ind Co Ltd | Vacuum treating apparatus |
| CN101648649A (en) * | 2009-09-03 | 2010-02-17 | 东莞宏威数码机械有限公司 | Vacuum basal plate transmitting system |
| CN202028472U (en) * | 2011-02-21 | 2011-11-09 | 浙江菲达环保科技股份有限公司 | Rotary anode type electrostatic precipitator |
| CN207592305U (en) * | 2017-11-21 | 2018-07-10 | 苏州盟特方立电子有限公司 | A kind of washer for aluminium foil class formation |
| CN208843784U (en) * | 2018-08-12 | 2019-05-10 | 上海合毓模具技术有限公司 | A kind of die steel cutting scrap adsorption recovery slot |
| CN209009524U (en) * | 2018-09-25 | 2019-06-21 | 河南中烟工业有限责任公司 | A kind of cleaning cigarette strip transporting chain plate dust-extraction unit |
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| Publication number | Publication date |
|---|---|
| CN112606287B (en) | 2022-06-07 |
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Denomination of invention: A polyimide casting film drying equipment Effective date of registration: 20231114 Granted publication date: 20220607 Pledgee: China Merchants Bank Co.,Ltd. Jinhua Branch Pledgor: Zhejiang Zhongke Jiuyuan New Material Co.,Ltd. Registration number: Y2023980065179 |