CN216988332U - Gravure coating device of porous membrane - Google Patents
Gravure coating device of porous membrane Download PDFInfo
- Publication number
- CN216988332U CN216988332U CN202123050752.3U CN202123050752U CN216988332U CN 216988332 U CN216988332 U CN 216988332U CN 202123050752 U CN202123050752 U CN 202123050752U CN 216988332 U CN216988332 U CN 216988332U
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- roller
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- scraper
- base film
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- 239000012528 membrane Substances 0.000 title claims abstract description 17
- 238000007756 gravure coating Methods 0.000 title claims abstract description 15
- 238000000576 coating method Methods 0.000 claims abstract description 72
- 239000011248 coating agent Substances 0.000 claims abstract description 66
- 229920001971 elastomer Polymers 0.000 claims abstract description 52
- 230000006835 compression Effects 0.000 claims abstract description 28
- 238000007906 compression Methods 0.000 claims abstract description 28
- 238000001035 drying Methods 0.000 claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 27
- 238000004804 winding Methods 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 2
- 239000002002 slurry Substances 0.000 abstract description 41
- 239000000463 material Substances 0.000 abstract description 12
- 230000005484 gravity Effects 0.000 abstract description 2
- 239000006255 coating slurry Substances 0.000 description 13
- 230000009286 beneficial effect Effects 0.000 description 10
- 238000005096 rolling process Methods 0.000 description 9
- 239000002904 solvent Substances 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 229920000098 polyolefin Polymers 0.000 description 6
- 238000011144 upstream manufacturing Methods 0.000 description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000004745 nonwoven fabric Substances 0.000 description 4
- 229910001593 boehmite Inorganic materials 0.000 description 3
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 3
- 238000007790 scraping Methods 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 229920001688 coating polymer Polymers 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000011236 particulate material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000012782 phase change material Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 239000005518 polymer electrolyte Substances 0.000 description 1
- 239000011527 polyurethane coating Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000011877 solvent mixture Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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- Coating Apparatus (AREA)
Abstract
The utility model discloses a gravure coating device for a porous membrane, which comprises a coating machine body, wherein the coating machine body consists of an unreeling device, a conveying device, a coating head, a drying box and a reeling device, the coating head comprises a gravure roller, a scraper knife, a trough and a rubber compression roller, the base membrane is positioned between the gravure roller and the rubber compression roller, the rubber compression roller is positioned above the gravure roller, the gravure roller is positioned inside the trough, the scraper knife is positioned at one side of the gravure roller, one side of the scraper knife is attached to the outer wall of the gravure roller, the coating head also comprises a liquid suction roller, the liquid suction roller is positioned at one side of the rubber compression roller, the liquid suction roller is attached to the outer wall of the rubber compression roller, and the coating head also comprises a scraper and a material receiving trough. According to the utility model, through the mutual matching of the gravure roller, the scraper knife, the trough and the rubber compression roller, the gravure coating direction is changed into vertical upward coating, namely the slurry is coated on the surface of the base film facing the ground, so that the downward seepage of the slurry under the influence of gravity is reduced, and the stable and uniform coating is facilitated.
Description
Technical Field
The utility model relates to the field of coating, in particular to a gravure coating device for a porous membrane.
Background
Coating on a porous media substrate is an important method for manufacturing a composite material with certain or some functions, and examples of the method are many, phase change materials or silicon carbide coatings provide heat insulation for sportswear to keep the temperature suitable for human bodies, polyurethane coatings are used for improving the air permeability and waterproof performance of clothes, besides the application in textile industry, coating on porous media also has wide application in other fields, such as the field of battery manufacturing, in recent years, directly coating polymer electrolyte membranes on porous catalytic gas diffusion layers is used for manufacturing membrane electrolyte components of PEM fuel cells, and in the field of lithium battery diaphragm manufacturing, coating alumina and boehmite particles on polyolefin porous diaphragms improves the high temperature resistance and electrolyte absorption performance of traditional polyolefin diaphragms, greatly improves the safety performance of lithium batteries, and advances the manufacturing technology of lithium batteries, in addition, the non-woven fabric is coated with alumina ceramic material by dipping to form another diaphragm manufacturing method.
In the coating process of polyolefin alumina or boehmite aqueous slurry for lithium battery, the particle size d50 of alumina or boehmite is 200nm, which is much larger than the pore size of polyolefin membrane, and in addition, the wetting property of water and polyolefin is poor, so that the particulate material and water do not enter into the micropores of the polyolefin membrane in a large amount in the coating and drying process, and from the coating process, the coating process is not different from the coating process on a nonporous base membrane, if the same slurry is coated on a non-woven fabric with an average pore size of 10 to even dozens of micrometers, the coating slurry often permeates into and penetrates through the non-woven fabric to reach the back surface thereof, and contacts with a coating roller, a roller or a roller in a drying box, and becomes an interference factor for damaging the coating and drying.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to a gravure coating apparatus for porous film, which solves the problems of the background art described above.
In order to achieve the purpose, the utility model provides the following technical scheme: a gravure coating device for porous membranes comprises a coating machine body, a coating device and a coating device, wherein the coating machine body consists of an unwinding device, a conveying device, a coating head, a drying box and a winding device, and a base membrane is arranged on the unwinding device;
the coating head comprises a gravure roller, a scraper knife, a trough and a rubber compression roller, the base film is located between the gravure roller and the rubber compression roller, the rubber compression roller is located above the gravure roller, the bottom of the gravure roller is located inside the trough, the scraper knife is located on one side of the gravure roller, and one side of the scraper knife is attached to the outer wall of the gravure roller.
Preferably, the coating head further comprises a liquid suction roller, the liquid suction roller is located on one side of the rubber pressing roller, and the outer wall of the liquid suction roller is attached to the outer wall of the rubber pressing roller.
Preferably, the coating head further comprises a scraper and a liquid collecting tank, the scraper and the liquid collecting tank are located on one side of the rubber compression roller, one side of the scraper is attached to the outer wall of the rubber compression roller, and the liquid collecting tank is located below the scraper.
Preferably, the conveying device comprises a carrier roller, and the base film is positioned above the carrier roller.
Preferably, the conveying device further comprises a roller, the roller is positioned between the coating head and the drying box, and the base film is positioned above the roller.
Preferably, the winding device comprises a motor and a winding roller, and the output end of the motor is in transmission connection with the winding roller.
The utility model has the technical effects and advantages that:
(1) according to the utility model, the gravure roller, the scraper knife, the trough and the rubber compression roller are matched with each other, so that the gravure coating direction is changed into vertical upward coating, namely the slurry is coated on the surface of the base film facing the ground, and the downward seepage of the slurry under the influence of gravity is reduced, and the coating is stable and uniform;
(2) according to the utility model, the rubber compression roller is used for moving towards the upstream of the base film along the horizontal direction Lmm, the compression roller moves towards the upstream, the base film is firstly contacted with the compression roller, then is suspended for a short distance of about Lmm and then is contacted with the slurry on the surface of the micro-concave roller, in this state, even if the slurry seeps out of the upper surface of the base film, the slurry cannot be contacted with the compression roller, the compression roller moves towards the downstream Lmm, the shaking of the base film transmitted from a drying box can be cut off, the coating stability and the coating uniformity are improved, and the problem that the residual seeped slurry influences the coating uniformity is solved;
(3) the utility model is beneficial to preventing the shaking of the base film transferred from the drying box and improving the coating stability and the coating uniformity by using the roller passing mode, and the condition is preferably used under the condition of less solvent seepage amount and smaller wrap angle of the base film on the roller passing;
(4) the novel liquid suction roller is additionally arranged beside the rubber compression roller in a mode of utilizing the liquid suction roller, is used for absorbing the mixture of the solvent and the slurry which seep out of the base film and flow onto the surface of the compression roller, and can be quickly replaced after the roller surface is saturated by absorbing the solvent;
(5) the utility model utilizes the mutual matching of the scraper and the material receiving groove to scrape the mixture of the solvent and the sizing agent which seeps out of the basal membrane and flows onto the surface of the press roll, and the material receiving groove collects the sizing agent scraped by the scraper.
Drawings
FIG. 1 is a schematic view of the structure of a coater assembly according to the present invention.
FIG. 2 is a schematic diagram of the gravure roll structure of the present invention.
FIG. 3 is a schematic view of the structure of the rubber press roll of the present invention.
FIG. 4 is a schematic view of the structure of the roll-passing part of the present invention.
FIG. 5 is a schematic view of the structure of the liquid suction roller according to the present invention.
Fig. 6 is a schematic view of the structure of the scraper of the present invention.
Fig. 7 is a schematic view of the structure of the drying box of the present invention.
In the figure: 1. an unwinding device; 2. a carrier roller; 21. rolling; 3. coating heads; 31. a gravure roller; 32. a scraping knife; 33. a trough; 34. a rubber press roll; 35. a liquid suction roller; 36. a scraper; 4. a drying oven; 5. a winding device; 6. a base film.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
The utility model provides a gravure coating device for porous membranes, which comprises a coating machine body, wherein the coating machine body consists of an unreeling device 1, a conveying device, a coating head 3, a drying box 4 and a reeling device 5, and a base membrane 6 is arranged on the unreeling device 1.
The unreeling device 1 comprises an unreeling roller which is convenient for pulling out a base film 6, the coating head 3 comprises a gravure roller 31, a scraper 32, a trough 33 and a rubber press roller 34, the coating direction of the gravure roller 31 is upward, the gravure roller 31 is beneficial to taking out coating slurry from the trough 33, and a uniform and stable average feed liquid equivalent thickness is formed in the groove of the gravure roller 31, the scraper 32 is beneficial to scraping redundant slurry in the gravure roller 31, the trough 33 is beneficial to taking materials from the gravure roller 31, the rubber compression roller 34 is beneficial to coating the coating slurry on the lower surface of the base film 6, the slurry is not easy to pass through the gap of the base film 6 to reach the upper surface, the base film 6 is positioned between the gravure roller 31 and the rubber compression roller 34, the rubber compression roller 34 is positioned above the gravure roller 31, the bottom of the gravure roller 31 is positioned in the trough 33, the scraper 32 is positioned at one side of the gravure roller 31, and one side of the scraper 32 is attached to the outer wall of the gravure roller 31.
The rubber press roll 34 may be moved Lmm, Lmm less than or equal to 50mm, either upstream or downstream of the horizontal base film 6, the upstream movement being beneficial to avoid penetration of the slurry onto the rubber press roll 34 and the downstream movement being beneficial to reduce fluttering of the base film 6.
The coating head 3 further comprises a liquid absorption roller 35, the liquid absorption roller 35 is beneficial to absorbing and removing slurry on the surface of the rubber press roller 34, the material of the liquid absorption roller 35 is preferably sponge, absorbent cotton, cotton cloth, non-woven fabric, fiber paper and the like, the liquid absorption roller 35 is replaceable, the liquid absorption roller 35 is located on one side of the rubber press roller 34, and the outer wall of the liquid absorption roller 35 is attached to the outer wall of the rubber press roller 34.
The coating head 3 further comprises a scraper 36 and a material receiving groove, the material receiving groove can be an inner cavity of a material receiving disc or a material receiving box, the scraper 36 is beneficial to scraping slurry on the surface of the rubber compression roller 34, the scraper 36 is made of rigid or flexible materials, the scraper 36 can be made of stainless steel sheets, plastic sheets, rubber sheets and the like, the scraper 36 and the material receiving groove are located on one side of the rubber compression roller 34, one side of the scraper 36 is attached to the outer wall of the rubber compression roller 34, and the material receiving groove is located below the scraper 36.
Conveyor includes bearing roller 2, is favorable to carrying base film 6, and base film 6 is located the top of bearing roller 2.
The conveying device further comprises a roller 21, wherein the roller 21 is beneficial to reducing the shaking of the base film 6 at the coating head 3, even if the base film 6 permeates to the back of the coating surface, a uniform coating layer can be formed because the roller is not contacted before the drying and curing are completed, the condition is preferably used in the condition that the solvent seepage quantity is less, the wrap angle of the base film 6 on the roller 21 is smaller, the roller 21 is positioned between the coating head 3 and the drying box 4, and the base film 6 is positioned above the roller 21.
Example two
S1: the base film 6 is drawn by the unwinding device 1, and then the base film 6 is conveyed by the conveying device.
S2: the base film 6 is conveyed to the coating head 3 by the conveying device, the coating head 3 performs coating treatment on the base film 6, the rubber press roll 34 moves Lmm to the upstream of the base film 6 along the horizontal direction and moves to-Lmm downstream, L is preferably less than 50mm, when the rubber press roll 34 moves to the upstream, the base film 6 is firstly contacted with the rubber press roll 34, then is suspended for a short distance of about Lmm and then is contacted with the slurry on the surface of the micro-gravure roll, the rotation of the gravure roll 31 can take the coating slurry out of the trough 33 in a rotating manner, the rotating gravure roll 31 drives the slurry to the scraper 32, the scraper 32 scrapes the excess slurry in the gravure roll 31 and the excess slurry falls into the trough 33, and the slurry forms uniform and stable average equivalent thickness of the slurry in the grooves of the gravure roll 31.
S3: the base film 6 is brought into sufficient contact with the gravure roll 31 under the pressure of the rubber press roll 34, and the coating slurry is applied to the lower surface of the base film 6.
S4: the base film 6 enters the inside of the drying box 4 after being coated, and then after being dried by the drying box 4, the base film 6 after being dried is rolled by the rolling device 5.
EXAMPLE III
S1: the base film 6 is drawn by the unwinding device 1, and then the base film 6 is conveyed by the conveying device.
S2: the base film 6 is conveyed to the coating head 3 by the conveying device, the coating head 3 performs coating treatment on the base film 6, coating slurry can be rotationally brought out from the trough 33 by the rotation of the gravure roll 31, the rotating gravure roll 31 drives the slurry to the scraper 32, the scraper 32 scrapes off redundant slurry in the gravure roll 31 and the redundant slurry falls into the trough 33, the slurry forms uniform and stable average equivalent feed liquid thickness in the groove of the gravure roll 31, and the base film 6 passes over the roller 21 after the coating is completed.
S3: the base film 6 is brought into sufficient contact with the gravure roll 31 under the pressure of the rubber press roll 34, and the coating slurry is applied to the lower surface of the base film 6.
S4: the base film 6 enters the inside of the drying box 4 after being coated, and then after being dried by the drying box 4, the base film 6 after being dried is rolled by the rolling device 5.
Example four
S1: the base film 6 is drawn by the unwinding device 1, and then the base film 6 is conveyed by the conveying device.
S2: the base film 6 is conveyed to the coating head 3 by the conveying device, the coating head 3 performs coating treatment on the base film 6, coating slurry can be rotationally taken out from a trough 33 by the rotation of the gravure roller 31, the rotating gravure roller 31 drives the slurry to a scraper 32, the scraper 32 scrapes the redundant slurry in the gravure roller 31 and the redundant slurry falls into the trough 33, and the slurry forms uniform and stable average equivalent thickness of the feed liquid in the groove of the gravure roller 31.
S3: the base film 6 is brought into full contact with the gravure roll 31 under the pressure of the rubber press roll 34, the suction roll 35 is brought into contact with the rubber press roll 34 when the rubber press roll 34 is rotated, the suction roll 35 absorbs the solvent and slurry mixture flowing from the base film 6 onto the surface of the rubber press roll 34, and after the roll surface of the suction roll 35 is saturated with the solvent, the quick change is performed and the coating slurry is applied to the lower surface of the base film 6.
S4: the base film 6 enters the inside of the drying box 4 after being coated, and then after being dried by the drying box 4, the base film 6 after being dried is rolled by the rolling device 5.
EXAMPLE five
S1: the base film 6 is drawn by the unwinding device 1, and then the base film 6 is conveyed by the conveying device.
S2: the base film 6 is conveyed to the coating head 3 by the conveying device, the coating head 3 performs coating treatment on the base film 6, coating slurry can be rotationally brought out from the trough 33 by the rotation of the gravure roll 31, the rotating gravure roll 31 drives the slurry to the scraper 32, the scraper 32 scrapes off the redundant slurry in the gravure roll 31 and the redundant slurry falls into the trough 33, and the slurry forms uniform and stable average equivalent feed liquid thickness in the groove of the gravure roll 31.
S3: the base film 6 is sufficiently contacted with the gravure roll 31 under the pressure of the rubber press roll 34, when the rubber press roll 34 rotates, one side of the scraper 36 is attached to the rubber press roll 34, the solvent and the slurry mixture which seep out of the base film 6 and flow onto the surface of the rubber press roll 34 are scraped by the scraper 36, the scraped slurry and the solvent mixture fall into the receiving tank, and the coating slurry is coated on the lower surface of the base film 6.
S4: base film 6 enters into the inside of drying cabinet 4 after the coating process, then after drying cabinet 4 is dry, coiling mechanism 5 carries out the rolling to base film 6 after the drying.
The working principle of the utility model is as follows: the unreeling device 1 is used for pulling out the base film 6, then the base film 6 is conveyed by the conveying device to the coating head 3, the coating head 3 is used for coating the base film 6, the rotation of the gravure roller 31 is utilized, the coating slurry can be taken out from the trough 33 in a rotating way, the rotating gravure roller 31 drives the slurry to the scraper 32, the scraper 32 scrapes the redundant slurry in the gravure roller 31 and the redundant slurry falls into the trough 33, the slurry forms uniform and stable average equivalent thickness of the feed liquid in the groove of the gravure roller 31, the base film 6 is brought into full contact with the gravure roll 31 under the pressure of the rubber press roll 34, and the coating slurry is applied to the lower surface of the base film 6, the base film 6 is subjected to the coating treatment and then enters the inside of the drying oven 4, then after drying by the drying oven 4, the winding device 5 winds the dried base film 6.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments, or make equivalent substitutions and improvements to part of the technical features of the foregoing embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The gravure coating device for the porous membrane is characterized by comprising a coating machine body, wherein the coating machine body consists of an unreeling device (1), a conveying device, a coating head (3), a drying box (4) and a reeling device (5), and a base membrane (6) is arranged on the unreeling device (1);
scribble leftover of bolt of cloth (3) and include gravure roller (31), scraper (32), silo (33) and rubber compression roller (34), base film (6) are located between gravure roller (31) and rubber compression roller (34), rubber compression roller (34) are located the top of gravure roller (31), the bottom of gravure roller (31) is located the inside of silo (33), scraper (32) are located one side of gravure roller (31), one side of scraper (32) is laminated with the outer wall of gravure roller (31) mutually.
2. The gravure coating device of a porous film according to claim 1, wherein the coating head (3) further includes a liquid suction roller (35), the liquid suction roller (35) is located at one side of the rubber press roller (34), and an outer wall of the liquid suction roller (35) is attached to an outer wall of the rubber press roller (34).
3. A porous film gravure coating device as claimed in claim 1, wherein the coating head (3) further comprises a scraper (36) and a catch tank, the scraper (36) and the catch tank are located on one side of the rubber press roll (34), one side of the scraper (36) is attached to an outer wall of the rubber press roll (34), and the catch tank is located below the scraper (36).
4. Gravure coating device for a porous film according to claim 1, characterized in that said conveying means comprise a carrier roller (2), said base film (6) being positioned above the carrier roller (2).
5. Gravure coating device of a porous film according to claim 1, characterized in that the transport device further comprises a pass-roller (21), the pass-roller (21) being located between the coating head (3) and the drying oven (4), and the base film (6) being located above the pass-roller (21).
6. The gravure coating device of a porous film according to claim 1, wherein the winding device (5) comprises a motor and a winding roller, and an output end of the motor is in transmission connection with the winding roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123050752.3U CN216988332U (en) | 2021-12-07 | 2021-12-07 | Gravure coating device of porous membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123050752.3U CN216988332U (en) | 2021-12-07 | 2021-12-07 | Gravure coating device of porous membrane |
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| Publication Number | Publication Date |
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| CN216988332U true CN216988332U (en) | 2022-07-19 |
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| CN202123050752.3U Expired - Fee Related CN216988332U (en) | 2021-12-07 | 2021-12-07 | Gravure coating device of porous membrane |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114178119A (en) * | 2021-12-07 | 2022-03-15 | 蓝廷新能源科技(绍兴)有限责任公司 | Gravure coating method and device for porous membrane |
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2021
- 2021-12-07 CN CN202123050752.3U patent/CN216988332U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114178119A (en) * | 2021-12-07 | 2022-03-15 | 蓝廷新能源科技(绍兴)有限责任公司 | Gravure coating method and device for porous membrane |
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Granted publication date: 20220719 |