CN115627657A - Using method and equipment of plastic-replacing paper paint - Google Patents
Using method and equipment of plastic-replacing paper paint Download PDFInfo
- Publication number
- CN115627657A CN115627657A CN202211310073.1A CN202211310073A CN115627657A CN 115627657 A CN115627657 A CN 115627657A CN 202211310073 A CN202211310073 A CN 202211310073A CN 115627657 A CN115627657 A CN 115627657A
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- CN
- China
- Prior art keywords
- coating
- paper
- plastic
- roller
- paint
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000003973 paint Substances 0.000 title claims description 26
- 238000000576 coating method Methods 0.000 claims abstract description 112
- 239000011248 coating agent Substances 0.000 claims abstract description 110
- 238000001035 drying Methods 0.000 claims abstract description 16
- 239000004033 plastic Substances 0.000 claims abstract description 13
- 238000004804 winding Methods 0.000 claims abstract description 11
- 238000005192 partition Methods 0.000 claims abstract description 6
- 239000007921 spray Substances 0.000 claims description 25
- 238000011084 recovery Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 11
- 238000007599 discharging Methods 0.000 claims description 4
- 238000007790 scraping Methods 0.000 claims description 4
- 238000010422 painting Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000002699 waste material Substances 0.000 description 5
- 238000000465 moulding Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
- D21H23/50—Spraying or projecting
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
- D21H25/04—Physical treatment, e.g. heating, irradiating
- D21H25/06—Physical treatment, e.g. heating, irradiating of impregnated or coated paper
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Coating Apparatus (AREA)
Abstract
The invention discloses a method and equipment for using plastic paper substitute coating, belonging to the technical field of papermaking, wherein two ends of a coating platform are respectively and rotatably connected with an unwinding roller and a winding roller through a support, the surface of the coating platform is rotatably connected with a supporting roller and a conveying roller through a support, a coating box and a drying box are arranged between the symmetrical conveying rollers, and a partition plate, an upper fixing plate, a guide plate and a symmetrical lower fixing plate are fixedly connected inside the coating box.
Description
Technical Field
The invention relates to the technical field of papermaking, in particular to a method and equipment for using a plastic-substituting paper coating.
Background
The plastic-substitute paper is a substitute of a plastic film, not only has the performance of the plastic film, but also is environment-friendly, for example, the production process of the plastic-substitute paper disclosed by the publication No. CN114481674A, the general plastic-substitute paper needs to be coated on the surface of paper in the production process, so that the toughness and the waterproof performance of the plastic-substitute paper are improved, but the double sides of the paper cannot be coated at one time in the coating process, the working efficiency is reduced, the coating thickness is not easy to control, meanwhile, the coating dropped in the coating process cannot be comprehensively recycled, and the coating cost of the plastic-substitute paper is invisibly increased.
Disclosure of Invention
The invention aims to provide a plastic paper substitute coating using method and equipment, wherein the plastic paper substitute coating using method and equipment are characterized in that a paper can enter a coating box through an upper spray head, a lower spray head and a scraper blade which are symmetrically arranged, double-sided coating can be performed at one time, the thickness of the coating can be controlled through the symmetrical scraper blades, and then the paper can be dried directly through a drying box, so that the working efficiency of the plastic paper substitute coating is greatly improved, the coating can be quickly recovered through a flow guide groove, a flow guide plate and a recovery pipe which are arranged, the waste of the coating is avoided, and the coating cost of the plastic paper is reduced.
In order to solve the above problems, the present invention adopts the following technical solutions.
The utility model provides a paper coating equipment of moulding instead, includes the coating platform, the both ends of coating platform are rotated respectively through the support and are connected with unreeling roller and wind-up roll, the surface of coating platform is connected with backing roll and conveying roller through the support rotation, and is provided with coating case and stoving case between the conveying roller of symmetry, the inside fixedly connected with baffle, an upper fixed plate, guide plate and the lower fixed plate of symmetry of coating case, the fixed surface of an upper fixed plate installs conveying pump and upper catheter, the fixed surface of lower fixed plate installs the downcomer, the fixed surface of upper catheter and downcomer is fixed mounting respectively has upper nozzle and lower shower nozzle, the fixed surface of an upper fixed plate and lower fixed plate is connected with symmetrical scraper blade, the scraper blade is the slope form setting, and the surface is equipped with the guiding gutter, the one end of coating case is equipped with the recovery tube, this paper coating application method and equipment of moulding instead, through the upper nozzle, lower shower nozzle and the scraper blade of the opposite of setting, can get into the coating incasement at paper, once only carry out the coating of two-sided, can control the thickness of coating through the scraper blade of symmetry simultaneously, then directly dry through the stoving case, great improvement the coating work efficiency of the coating to the waste of the coating, the guide plate can be carried out the cost of the waste of the guide plate, has avoided the paper to carry out the cost.
Furthermore, the surface of the material conveying pump is fixedly connected with a material sucking pipe and a material discharging pipe, one end of the material discharging pipe is fixedly connected with the surface of the upper guide pipe, the upper guide pipe and the lower guide pipe are both U-shaped, and one ends of the upper guide pipe and the lower guide pipe are fixedly connected.
Further, the symmetry bottom plate is the slope form setting, the bottom plate is sixty to eighty degrees with the inner wall contained angle of scribbling the workbin, the length of bottom plate is the same with the length of upper fixed plate.
Furthermore, symmetrical openings are formed in the side face of the paint box, the length of each opening is larger than the maximum width of the paper, and the width of each opening is larger than the maximum thickness of the paper after painting.
Further, the upper spray heads are distributed at equal intervals along the length direction of the upper fixing plate, and the lower spray heads are distributed at equal intervals along the length direction of the lower fixing plate.
Furthermore, a coating chamber is surrounded by the partition plate and the coating box, and a feeding hopper is arranged at one end of the coating chamber.
Furthermore, the drying box is fixedly provided with an air heater inside, and two sides of the drying box are provided with an inlet and an outlet for paper to enter and exit.
The invention discloses a using method of a plastic-replacing paper coating, which is characterized by comprising the following steps:
p1, connecting the rolled paper of the unwinding roller with a supporting roller, a conveying roller and a winding roller respectively, and adding the mixed and stirred coating into a coating chamber;
p2, starting an unwinding roller, a conveying roller, a winding roller and a material conveying pump;
p3, the paper conveyed rightwards moves at a constant speed, and at the moment, the paint is conveyed to the upper spray head and the lower spray head by the material conveying pump to paint the upper surface and the lower surface of the moving paper;
p4, the paper after being coated continues to move rightwards, so that the coated paint is scraped by the symmetrical scrapers;
p5, coating scraped by the scraper and coating sprayed and flowed out by the upper spray head and the lower spray head fall to the bottom of the coating box and are recovered through a recovery pipe;
p6, the scraped coating paper continues to move rightwards and enters a drying box for drying;
and P7, winding the dried plastic substitute paper by a winding roller, and transferring the wound plastic substitute paper to the next process.
Further, the coating scraped by the scraper blade in the step P5 flows out to the two ends of the scraper blade through the diversion trench and is separated from the surface of the paper.
Further, one end of the recovery pipe in the step P5 is provided with a sealing end cover.
Compared with the prior art, the invention has the advantages that:
(1) According to the invention, through the symmetrical upper spray head, the lower spray head and the scraper blade, double-sided coating can be carried out once when paper enters the coating box, meanwhile, the thickness of the coating can be controlled through the symmetrical scraper blade, and then the paper is directly dried through the drying box, so that the working efficiency of the plastic-paper-substitute coating is greatly improved, and the coating can be rapidly recovered through the arranged guide groove, the guide plate and the recovery pipe, so that the waste of the coating is avoided, and the coating cost of the plastic-paper-substitute is reduced.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an enlarged view of the portion A of FIG. 1;
FIG. 3 is a side view of the upper fixing plate and the upper nozzle mounting structure of FIG. 2;
fig. 4 is a side view of the flight configuration of fig. 2.
The numbering in the figures illustrates:
1 coating platform, 11 supporting rollers, 12 conveying rollers, 13 unreeling rollers, 14 reeling rollers, 2 coating boxes, 21 partition plates, 22 coating chambers, 23 upper fixing plates, 24 lower fixing plates, 25 openings, 26 guide plates, 27 recovery pipes, 3 delivery pumps, 31 upper guide pipes, 32 lower guide pipes, 33 upper spray heads, 34 lower spray heads, 4 scraping plates, 41 diversion trenches and 5 drying boxes.
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 obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Referring to fig. 1-4, a plastic paper coating apparatus includes a coating table 1, referring to fig. 1-4, two ends of the coating table 1 are respectively rotatably connected with an unwinding roller 13 and a winding roller 14 through a bracket, a support roller 11 and a delivery roller 12 are rotatably connected to the surface of the coating table 1 through a bracket, a coating tank 2 and a drying tank 5 are arranged between the symmetrical delivery rollers 12, a partition plate 21, an upper fixing plate 23, a guide plate 26 and a symmetrical lower fixing plate 24 are fixedly connected to the inside of the coating tank 2, a coating chamber 22 is enclosed by the partition plate 21 and the coating tank 2, one end of the coating chamber 22 is provided with a hopper, the coating chamber 22 is used for storing coating, and is internally provided with a heating rod to prevent liquid coating from solidifying, a delivery pump 3 and an upper guide pipe 31 are fixedly installed on the surface of the upper fixing plate 23, the surface of the delivery pump 3 is fixedly connected with a suction pipe and a discharge pipe, one end of the discharge pipe is fixedly connected with the surface of the upper guide pipe 31, the upper guide pipe 31 and the lower guide pipe 32 are both U-shaped, one end of the upper guide pipe 31 is fixedly connected with one end of the lower guide pipe 32, the suction pipe of the delivery pump 3 is communicated with the coating chamber 22, so that the coating is conveniently conveyed, the lower guide pipe 32 is fixedly installed on the surface of the lower fixing plate 24, the upper spray head 33 and the lower spray head 34 are respectively and fixedly installed on the surfaces of the upper guide pipe 31 and the lower guide pipe 32, the symmetrical scraping plates 4 are fixedly connected with the surfaces of the upper fixing plate 23 and the lower fixing plate 24, the scraping plates 4 are arranged in an inclined mode, the surface is provided with a diversion groove 41, and one end of the coating box 2 is provided with a recovery pipe 27.
Preferably, the symmetrical lower fixing plate 24 is arranged in an inclined shape, the included angle between the lower fixing plate 24 and the inner wall of the paint tank 2 is sixty to eighty degrees, the length of the lower fixing plate 24 is the same as that of the upper fixing plate 23, the lower fixing plate has a flow guiding function, so that the flowing paint can automatically fall on the bottom of the paint tank 2, symmetrical openings 25 are formed in the side surface of the paint tank 2, the length of the openings 25 is larger than the maximum width of paper, the width of the openings 25 is larger than the maximum thickness of the paper after painting, when the paper enters or exits the paint tank 2, the openings 25 cannot be touched and scraped, and the quality of the paint is guaranteed.
Preferably, the upper nozzles 33 are equidistantly distributed along the length direction of the upper fixing plate 23, the lower nozzles 34 are equidistantly distributed along the length direction of the lower fixing plate 24, the coating can be uniformly coated on the surface of the paper passing through the upper nozzles 33 and the lower nozzles 34 which are equidistantly distributed, the hot air blower is fixedly installed inside the drying box 5, and the paper inlet and outlet are formed in the two sides of the hot air blower, so that the paper can be conveniently dried in and out of the drying box 5, and the plastic substitute paper surface is prevented from being scratched.
The invention discloses a using method of plastic-substituting paper paint, which is characterized by comprising the following steps of:
p1, firstly, connecting the rolled paper of the unwinding roller 13 with a supporting roller 11, a conveying roller 12 and a winding roller 14 respectively, and then adding the mixed and stirred paint into a paint chamber 22;
p2, then starting the unwinding roller 13, the conveying roller 12, the winding roller 14 and the delivery pump 3;
p3, moving the paper conveyed rightwards at a constant speed, conveying the coating to an upper spray head 33 and a lower spray head 34 by a material conveying pump 3 at the moment, and coating the upper surface and the lower surface of the moved paper;
p4, the coated paper continues to move rightwards, so that the coated paint is scraped by the symmetrical scraper 4;
p5, the coating scraped by the scraper 4 and the coating sprayed and flowed out by the upper spray head 33 and the lower spray head 34 fall downwards to the bottom of the coating box 2 and are recovered through a recovery pipe 27;
p6, the paint paper which is leveled off at the moment continuously moves rightwards and enters the drying box 5 for drying;
p7, the dried plastic substitute paper is wound by a winding roller 14, and the wound plastic substitute paper is transferred to the next process.
Preferably, the paint scraped by the scraper 4 in the step P5 flows out to the two ends of the scraper 4 through the diversion trench 41 and is separated from the surface of the paper, and the length of the scraper 4 is greater than the maximum width of the paper, so that the function of diversion is achieved.
Preferably, one end of the recovery pipe 27 in the step P5 is provided with a sealing end cap, and the recovery pipe 27 is sleeved on the surface of the coating platform 1, so that the coating container can conveniently recover the coating through the lower end of the coating platform 1.
This paper coating application method and equipment moulds instead, through symmetrical last shower nozzle 33, lower shower nozzle 34 and scraper blade 4 that set up, can once only carry out the two-sided coating of paper in the paper gets into paint box 2, can control the thickness of coating through symmetrical scraper blade 4 simultaneously, then directly dry through stoving case 5, guaranteed the coating quality, great improvement the work efficiency of paper coating of moulding instead, and through guiding gutter 41, guide plate 26 and the recovery tube 27 that sets up, can carry out quick recovery with the too much coating of spraying in paint box 2, avoid the coating to cause the waste, the coating cost of the paper of moulding instead has been reduced.
The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should also be able to cover the technical scope of the present invention by the equivalent or modified embodiments and the modified concepts of the present invention.
Claims (10)
1. A plastic-paper-substitute coating equipment comprises a coating platform (1), and is characterized in that: the utility model discloses a coating machine, including coating platform (1), coating platform, spray head, lower fixed plate, scraper blade (4), the both ends of coating platform (1) are rotated respectively through the support and are connected with unreel roller (13) and wind-up roll (14), the surface of coating platform (1) is rotated through the support and is connected with backing roll (11) and conveying roller (12), and is provided with between symmetrical conveying roller (12) scribbles workbin (2) and stoving case (5), the inside fixedly connected with baffle (21), an upper fixed plate (23), guide plate (26) and symmetrical lower fixed plate (24) of scribbling workbin (2), the fixed surface of an upper fixed plate (23) installs defeated material pump (3) and upper catheter (31), the fixed surface of lower fixed plate (24) installs lower catheter (32), the fixed surface of upper catheter (31) and lower catheter (32) is fixed mounting respectively has last shower nozzle (33) and lower shower nozzle (34), the fixed surface of upper fixed plate (23) and lower fixed plate (24) is connected with symmetrical scraper blade (4), scraper blade (4) are the slope of symmetry, scraper blade (4) are the form setting, and the surface is equipped with guiding gutter (41), the one end of scribbling workbin (2) is equipped with recovery tube (27).
2. A plastic-substituted paper coating apparatus as claimed in claim 1, wherein: the surface fixed connection of conveying pump (3) inhales material pipe and discharging pipe, and the one end of discharging pipe and the fixed surface of upper catheter (31) are connected, the shape of upper catheter (31) and downcomer (32) is the U-shaped, the one end fixed connection of upper catheter (31) and downcomer (32).
3. A plastic-substituted paper coating apparatus as claimed in claim 1, wherein: the symmetry bottom plate (24) are the slope form setting, bottom plate (24) and the inner wall contained angle of scribbling workbin (2) are sixty to eighty degrees, the length of bottom plate (24) is the same with the length of upper fixed plate (23).
4. A plastic-substituted paper coating apparatus as claimed in claim 1, wherein: the side surface of the paint box (2) is provided with a symmetrical opening (25), the length of the opening (25) is larger than the maximum width of paper, and the width of the opening (25) is larger than the maximum thickness of the paper after painting.
5. A plastic-substituted paper coating apparatus as claimed in claim 1, wherein: the upper spray heads (33) are distributed at equal intervals along the length direction of the upper fixing plate (23), and the lower spray heads (34) are distributed at equal intervals along the length direction of the lower fixing plate (24).
6. A plastic-substituted paper coating apparatus as claimed in claim 1, wherein: a coating chamber (22) is surrounded by the partition plate (21) and the coating box (2), and a feeding hopper is arranged at one end of the coating chamber (22).
7. A plastic-paper-substitute coating apparatus according to claim 1, wherein: an air heater is fixedly arranged in the drying box (5), and an inlet and an outlet for paper to enter and exit are formed in two sides of the air heater.
8. A using method of a plastic-replacing paper coating is characterized by comprising the following steps:
p1, firstly, connecting the rolled paper of the unwinding roller (13) with a supporting roller (11), a conveying roller (12) and a winding roller (14) respectively, and then adding the mixed and stirred paint into a paint chamber (22);
p2, starting an unreeling roller (13), a conveying roller (12), a reeling roller (14) and a material conveying pump (3);
p3, moving the paper conveyed rightwards at a constant speed, conveying the coating to an upper spray head (33) and a lower spray head (34) by a material conveying pump (3) at the moment, and coating the upper surface and the lower surface of the moved paper;
p4, the paper after being coated continues to move rightwards, so that the coated coating is scraped by the symmetrical scraping plates (4);
p5, the coating scraped by the scraper (4) and the coating sprayed and flowed out by the upper spray head (33) and the lower spray head (34) fall to the bottom of the coating box (2) and are recovered through a recovery pipe (27);
p6, the paint paper which is leveled off at the moment continuously moves rightwards and enters a drying box (5) for drying;
p7, the dried plastic substitute paper is wound by a winding roller (14), and the wound plastic substitute paper is transferred to the next procedure.
9. The use method of the plastic-substituting paper paint as claimed in claim 8, wherein: and in the step P5, the coating scraped by the scraper blade (4) flows out to the two ends of the scraper blade (4) through the diversion trench (41) and is separated from the surface of the discharged paper.
10. The use method of the plastic-substituting paper paint as claimed in claim 8, characterized in that: one end of the recovery pipe (27) in the step P5 is provided with a sealing end cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211310073.1A CN115627657A (en) | 2022-10-25 | 2022-10-25 | Using method and equipment of plastic-replacing paper paint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211310073.1A CN115627657A (en) | 2022-10-25 | 2022-10-25 | Using method and equipment of plastic-replacing paper paint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115627657A true CN115627657A (en) | 2023-01-20 |
Family
ID=84906762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211310073.1A Pending CN115627657A (en) | 2022-10-25 | 2022-10-25 | Using method and equipment of plastic-replacing paper paint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115627657A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118895688A (en) * | 2024-07-17 | 2024-11-05 | 浙江海景新材料有限公司 | A device for regulating the distribution and adhesion state of coating on paper surface |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210234151U (en) * | 2019-04-29 | 2020-04-03 | 赵天顺 | Waterproof high strength corrugated box apparatus for producing |
| CN212223458U (en) * | 2020-04-26 | 2020-12-25 | 昆山众汇复合材料有限公司 | Two-sided drenching membrane is from type processingequipment for paper |
| CN112900143A (en) * | 2021-02-20 | 2021-06-04 | 张发志 | Production of degradable drenches membrane paper is with two-sided membrane device that drenches |
| CN214736999U (en) * | 2021-04-26 | 2021-11-16 | 青岛腾佳业电子有限公司 | Processing of release paper is with drenching membrane equipment |
-
2022
- 2022-10-25 CN CN202211310073.1A patent/CN115627657A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210234151U (en) * | 2019-04-29 | 2020-04-03 | 赵天顺 | Waterproof high strength corrugated box apparatus for producing |
| CN212223458U (en) * | 2020-04-26 | 2020-12-25 | 昆山众汇复合材料有限公司 | Two-sided drenching membrane is from type processingequipment for paper |
| CN112900143A (en) * | 2021-02-20 | 2021-06-04 | 张发志 | Production of degradable drenches membrane paper is with two-sided membrane device that drenches |
| CN214736999U (en) * | 2021-04-26 | 2021-11-16 | 青岛腾佳业电子有限公司 | Processing of release paper is with drenching membrane equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118895688A (en) * | 2024-07-17 | 2024-11-05 | 浙江海景新材料有限公司 | A device for regulating the distribution and adhesion state of coating on paper surface |
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Application publication date: 20230120 |
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| RJ01 | Rejection of invention patent application after publication |