CN107715703B - Production device and method of multilayer composite flat plate film - Google Patents
Production device and method of multilayer composite flat plate film Download PDFInfo
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- CN107715703B CN107715703B CN201711092756.3A CN201711092756A CN107715703B CN 107715703 B CN107715703 B CN 107715703B CN 201711092756 A CN201711092756 A CN 201711092756A CN 107715703 B CN107715703 B CN 107715703B
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- 239000002131 composite material Substances 0.000 title claims abstract description 51
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title abstract description 11
- 239000011248 coating agent Substances 0.000 claims abstract description 71
- 238000000576 coating method Methods 0.000 claims abstract description 71
- 238000007493 shaping process Methods 0.000 claims abstract description 53
- 238000005507 spraying Methods 0.000 claims abstract description 38
- 230000004048 modification Effects 0.000 claims abstract description 28
- 238000012986 modification Methods 0.000 claims abstract description 28
- 239000000463 material Substances 0.000 claims abstract description 26
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 20
- 238000004804 winding Methods 0.000 claims abstract description 10
- 238000009998 heat setting Methods 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 15
- 230000009471 action Effects 0.000 claims description 14
- 239000010410 layer Substances 0.000 claims description 12
- 230000007246 mechanism Effects 0.000 claims description 10
- 239000011265 semifinished product Substances 0.000 claims description 8
- 238000005266 casting Methods 0.000 claims description 7
- 238000007664 blowing Methods 0.000 claims description 6
- 239000002344 surface layer Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000000047 product Substances 0.000 claims description 4
- 238000010408 sweeping Methods 0.000 claims description 4
- 239000000443 aerosol Substances 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000010453 quartz Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000000243 solution Substances 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 3
- 239000012528 membrane Substances 0.000 abstract description 12
- 230000008569 process Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000005191 phase separation Methods 0.000 abstract description 2
- 238000005070 sampling Methods 0.000 description 10
- 238000005096 rolling process Methods 0.000 description 4
- 239000002033 PVDF binder Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000000614 phase inversion technique Methods 0.000 description 2
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000002145 thermally induced phase separation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/06—Flat membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0002—Organic membrane manufacture
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/12—Composite membranes; Ultra-thin membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/30—Polyalkenyl halides
- B01D71/32—Polyalkenyl halides containing fluorine atoms
- B01D71/34—Polyvinylidene fluoride
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2323/00—Details relating to membrane preparation
- B01D2323/26—Spraying processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2323/00—Details relating to membrane preparation
- B01D2323/42—Details of membrane preparation apparatus
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention discloses a production device and a production method of a multilayer composite flat plate film, wherein the device comprises an uncoiling frame, a swinging coating head, a spraying coating head and a surface modification coating device; a coiled non-woven fabric base material is placed on the uncoiling frame, and the lower end of the non-woven fabric base material is flatly paved on the traction conveyor belt; a flattening device is arranged on the traction conveyor belt at the rear side of the uncoiling frame; the rear side of the flattening device is sequentially provided with a first shaping groove and a second shaping groove; the rear side of the second shaping groove is sequentially provided with a surface modification coating device, a heat shaping device and an automatic winding device; a swinging coating head is arranged between the flattening device and the first forming groove; a spray coating head and an air knife leveling device are arranged between the first shaping groove and the second shaping groove. The invention can be used for producing the multilayer composite flat plate membrane with higher membrane aperture precision, the thickness of the membrane wall of the flat plate membrane is thin and uniform, and the production device has strong adaptability and wide adaptability to wet phase inversion, thermal phase separation and composite thermal phase process technologies.
Description
Technical Field
The present invention relates to a production apparatus and method, and more particularly, to a production apparatus and method for a multi-layer composite flat film.
Background
The flat membrane is a membrane with micropore selective permeability, and can be widely used for filtration or separation in various fields such as industrial and municipal sewage treatment, drinking water purification, reclaimed water recycling, sea water desalination pretreatment, pharmacy, food and the like. At present, the spinning production of the flat film mainly adopts a scraper type one-step forming device and a scraper type one-step forming process, and mainly has the following defects: 1) The accuracy of the membrane aperture is not high; 2) Uneven film wall thickness; 3) The adaptability of the production device is poor, for example, the production device can only adapt to the process of a wet phase inversion method or a thermal phase inversion method.
Disclosure of Invention
In order to solve the defects of the technology, the invention provides a production device and a production method of a multilayer composite flat plate film.
In order to solve the technical problems, the invention adopts the following technical scheme: a production method of a production device of a multilayer composite flat plate film,
the production device comprises an uncoiling frame, a swinging coating head, a spraying coating head and a surface modification coating device; a coiled non-woven fabric base material is placed on the uncoiling frame, and the lower end of the non-woven fabric base material is flatly paved on the traction conveyor belt; a flattening device is arranged on the traction conveyor belt at the rear side of the uncoiling frame; the rear side of the flattening device is sequentially provided with a first shaping groove and a second shaping groove;
an automatic winding device is arranged at the rear side of the second shaping groove; a heat setting device is arranged on the traction conveyor belt between the second setting groove and the automatic winding device; the front side of the heat setting device is provided with a surface modification coating device;
the upper end of the traction conveyor belt between the flattening device and the first forming groove is provided with a swinging coating head; the upper end of the traction conveyor belt between the first shaping groove and the second shaping groove is sequentially provided with a spray coating head and an air knife sweeping device from front to back;
the production method comprises the following steps:
a. placing a non-woven fabric substrate of the flat film on an uncoiling frame;
b. the non-woven fabric base material firstly passes through the flattening device under the action of the traction conveyor belt, and is smoother and more orderly under the actions of the flattening roller and the deviation correcting mechanism;
c. swinging the swinging coating head within the range of 5-50 mm according to working conditions, and uniformly coating the casting film liquid on the non-woven fabric base material;
d. shaping the non-woven fabric base material coated with the casting solution in a first shaping groove to form a bottom film of the multi-layer composite flat plate film;
e. the spray coating head further uniformly coats the coating material on the bottom film of the multilayer composite flat film, and then rapidly dries under the blowing action of the air knife sweeping device;
f. the dried coating base film is transferred to a second shaping groove for secondary shaping to form a semi-finished film of the multilayer composite flat film;
g. after the semi-finished product film of the multilayer composite flat film is discharged from the second shaping groove, uniformly coating the spraying liquid on the outer surface layer of the semi-finished product of the multilayer composite flat film under the action of a surface modification coating device;
h. and finally, heating and forming the finished product of the multilayer composite flat film coated with the spraying liquid in a heat setting device, and forming a coil shape through the rolling action of an automatic rolling device to finish the preparation.
Further, the first shaping groove and the second shaping groove are constant-temperature and constant-concentration shaping grooves, and shaping liquid in the shaping grooves is aqueous solution.
Further, the flattening device consists of a flattening roller and a deviation rectifying mechanism, and the flattening roller and the deviation rectifying mechanism are respectively used for flattening the base material and automatically rectifying.
Further, a row of small holes for spraying are arranged on the spraying coating head, the diameter of the small holes is 0.2-2 mm, and the hole spacing is 3-10 mm.
Further, the clearance of the air knife on the air knife leveling device is 0.1-2 mm, and the working air pressure is 0.1-0.5 MPa.
Further, the surface modification coating device is a multi-tube type aerosol spraying device, and the tube spacing is 10-200 mm.
Further, the heating element on the heat setting device is a quartz tube.
The invention can be used for producing the multilayer composite flat plate membrane with higher membrane aperture precision, the thickness of the membrane wall of the flat plate membrane is thin and uniform, and the production device has strong adaptability and wide adaptability to wet phase inversion, thermal phase separation and composite thermal phase process technologies.
Drawings
Fig. 1 is a schematic diagram of a system structure according to the present invention.
In the figure: 1. an uncoiling frame; 2. a flattening device; 3. swinging the coating head; 4. a first forming groove; 5. spraying a coating head; 6. an air knife leveling device; 7. a second shaping groove; 8. a surface modification coating device; 9. a heat setting device; 10. and an automatic winding device.
Detailed Description
The invention will be described in further detail with reference to the drawings and the detailed description.
The production device of the multilayer composite flat plate film shown in fig. 1 comprises an uncoiling frame 1, a swinging coating head 3, a spraying coating head 5 and a surface modification coating device 8; a coiled non-woven fabric base material is placed on the uncoiling frame 1, and the lower end of the non-woven fabric base material is flatly paved on the traction conveyor belt; a flattening device 2 is arranged on the traction conveyor belt at the rear side of the uncoiling frame 1; the flattening device 2 consists of a flattening roller and a deviation rectifying mechanism, and the flattening roller and the deviation rectifying mechanism are respectively used for flattening the base material and automatically rectifying.
The rear side of the flattening device 2 is provided with a first shaping groove 4 and a second shaping groove 7 in sequence; the first shaping tank 4 and the second shaping tank 7 are constant-temperature and constant-concentration shaping tanks, and shaping liquid in the shaping tanks is aqueous solution.
The rear side of the second shaping groove 7 is provided with an automatic winding device 10, the automatic winding device is a stepless speed regulating winding device of an air expansion shaft, and the production traction speed is 0-50 m/min; a heat setting device 9 is arranged on the traction conveyor belt between the second setting groove 7 and the automatic winding device 10, and a heating element on the heat setting device 9 is a quartz tube.
The front side of the heat setting device 9 is provided with a surface modification coating device 8; the surface modification coating device 8 is a multi-tube type aerosol spraying device, and can uniformly coat the spraying liquid on the outer surface layer of the semi-finished product of the multi-layer composite flat film in a thin way, wherein the tube spacing is 10-200 mm.
The upper end of the traction conveyor belt between the flattening device 2 and the first shaping groove 4 is provided with a swinging coating head 3, and the swinging range of the swinging coating head 3 is 5-50 mm; the upper end of the traction conveyor belt between the first shaping groove 4 and the second shaping groove 7 is provided with a spray coating head 5 and an air knife leveling device 6 in sequence from front to back. The spray coating head 5 is provided with a row of small holes for spraying, the diameter of the small holes is 0.2-2 mm, and the hole spacing is 3-10 mm. The clearance between the air knives on the air knife leveling device 6 is 0.1-2 mm, and the working air pressure is 0.1-0.5 MPa.
The production process of multilayer composite flat film includes the following steps:
a. placing a non-woven fabric substrate of a flat film on an uncoiling frame 1;
b. the non-woven fabric base material firstly passes through the flattening device 2 under the action of the traction conveyor belt, and becomes smoother and more orderly under the actions of the flattening roller and the deviation correcting mechanism;
c. swinging the swinging coating head 3 within the range of 5-50 mm according to working conditions, and uniformly coating the casting film liquid on the non-woven fabric base material;
d. shaping the non-woven fabric base material coated with the casting solution in a first shaping groove 4 to form a bottom film of the multi-layer composite flat plate film;
e. the spray coating head 5 further uniformly coats the coating material on the bottom film of the multilayer composite flat film, and then the coating material is quickly dried under the blowing action of the air knife sweeping device 6;
f. the dried coating base film is transferred to a second shaping groove 7 for secondary shaping to form a semi-finished film of the multilayer composite flat film;
g. after the semi-finished product film of the multilayer composite flat film comes out of the second shaping groove 7, the spraying liquid is uniformly coated on the outer surface layer of the semi-finished product of the multilayer composite flat film under the action of the surface modification coating device 8;
h. the finished product of the multilayer composite flat film coated with the spraying liquid is finally heated and formed in a heat setting device 9, and is rolled by a rolling function of an automatic rolling device 10 to finish the preparation.
The technical effects of the present invention and its broad applicability are explained in detail below by three specific examples:
embodiment 1,
The production device of the multilayer composite flat plate film is used for producing PVDF multilayer composite flat plate film by a wet method: setting the production traction speed to be 16 meters/min, firstly swinging the coating head 3 to stop not rotating, and stopping the spraying coating head 5 and the surface modification coating device 8 to work, wherein the production traction speed is equal to that of a common flat film, and taking a sample 1 after the operation is stable for 10 minutes; then setting the swing amplitude of the swing coating head to 20mm/min, starting swing, enabling the spray coating head 5 and the surface modification coating device 8 to be not operated, and sampling the sample 2 after the operation is stable for 10 minutes; then further opening the spray coating head 5, wherein the air knife leveling device 6 and the surface modification coating device 8 do not work at the moment, and sampling the sample 3 after the sample is stable for 10 minutes after the sample is operated; then further starting an air knife leveling device 6, setting an air knife clearance of 0.3mm, blowing by an air knife with the air pressure of 0.2MPa, and sampling a sample 4 after the sample is stable for 10 minutes during operation; finally, the surface modification coating device 8 and the heat setting device 9 are started, and the sample 5 is sampled after the sample is stabilized for 10 minutes of operation.
After post-treatment of 5 samples in example one in a usual manner, the data and analysis were examined and are shown in table 1.
Embodiment II,
The production device of the multilayer composite flat plate film is used for producing PVDF multilayer composite flat plate film by a thermally induced phase separation method: setting the production traction speed to 45 m/min, firstly swinging the coating head 3 to stop not rotating, and stopping the spray coating head 5 and the surface modification coating device 8 to work, wherein the production traction speed is equal to that of a common flat film, and sampling a sample 6 after the operation is stable for 10 minutes; then setting the swing amplitude of the swing coating head 3 to be 30mm/min, starting to swing at the same time, enabling the spray coating head 5 and the surface modification coating device 8 to be not operated, and sampling a sample 7 after the operation is stable for 10 minutes; then further starting the spray coating head 5, the air knife leveling device 6 and the surface modification coating device 8, and sampling the sample 8 after the operation is stable for 10 minutes; then further starting an air knife leveling device 6, setting an air knife clearance of 0.5mm, blowing by an air knife with the air pressure of 0.5MPa, and sampling a sample 9 after the sample is stable for 10 minutes after running; finally, the surface modification coating device 8 and the heat setting device 9 are started, and the sample 10 is sampled after the operation is stabilized for 10 minutes.
The test data and analysis are shown in Table 1 after post-treatment of 5 samples from example two in the usual manner.
Third embodiment,
The production device of the multilayer composite flat plate film is used for the PVDF multilayer composite flat plate film by a composite thermal induced phase method: setting the production traction speed to be 30 m/min, firstly swinging the coating head 3 to stop not rotating, and stopping the spray coating head 5 and the surface modification coating device 8 to work, wherein the production traction speed is equal to that of a common flat film, and sampling a sample 11 after the operation is stable for 10 minutes; setting the swing amplitude of the swing coating head 3 to 40mm/min, starting to swing at the same time, enabling the spray coating head 5 and the surface modification coating device 8 not to work, and sampling a sample 12 after the operation is stable for 10 minutes; then further opening the spray coating head 5, wherein the air knife leveling device 6 and the surface modification coating device 8 do not work at the moment, and sampling a sample 13 after the operation is stable for 10 minutes; then opening an air knife leveling device 6, setting an air knife clearance of 0.6mm, blowing by an air knife with the air pressure of 0.3MPa, and taking a sample 14 after the operation is stable for 10 minutes; finally, the surface modification coating device 8 and the heat setting device 9 are started, and the sample 15 is sampled after the operation is stabilized for 10 minutes.
The test data and analysis are shown in Table 1 after post-treatment of the samples of example 5 in the usual manner.
Table 1 multilayer composite flat sheet film test data sheet
Compared with the prior art, the invention has the following advantages:
(1) The separation precision of the flat membrane product can be improved by combining the performances of the composite layers through the multi-layer composite effect;
(2) The swinging coating head is adopted, and the transverse leveling and further mixing uniformity of the casting film liquid are driven by the swinging of the coating head, so that the uniformity of the thickness of the bottom film layer of the multilayer composite flat film is improved; meanwhile, the uniformity of material mixing can be further improved, so that the uniformity of separation aperture is improved.
(3) The spraying coating head and the air knife leveling device are adopted, so that when the outer surface layer of the flat plate film is coated, the coating and leveling mechanism is not in hard contact with the bottom film layer of the multi-layer composite flat plate film, the bottom film layer is not damaged, and the uniformity of the flat plate film layer is improved.
(4) The spray liquid is uniformly and thinly coated on the outer surface layer of the semi-finished product of the multilayer composite flat film by adopting the multitube structure of the surface modification coating device, so that the adaptability of the production device is further improved.
The above embodiments are not intended to limit the present invention, and the present invention is not limited to the above examples, but is also intended to be limited to the following claims.
Claims (7)
1. The production method of the production device of the multilayer composite flat plate film is characterized by comprising the following steps of:
the production device comprises an uncoiling frame (1), a swinging coating head (3), a spraying coating head (5) and a surface modification coating device (8); a coiled non-woven fabric base material is placed on the uncoiling frame (1), and the lower end of the non-woven fabric base material is flatly paved on the traction conveyor belt; a flattening device (2) is arranged on a traction conveyor belt at the rear side of the uncoiling frame (1); the rear side of the flattening device (2) is sequentially provided with a first shaping groove (4) and a second shaping groove (7);
an automatic winding device (10) is arranged at the rear side of the second shaping groove (7); a heat setting device (9) is arranged on the traction conveyor belt between the second setting groove (7) and the automatic winding device (10); the front side of the heat setting device (9) is provided with a surface modification coating device (8);
the upper end of the traction conveyor belt between the flattening device (2) and the first forming groove (4) is provided with a swinging coating head (3); the upper end of the traction conveyor belt between the first shaping groove (4) and the second shaping groove (7) is sequentially provided with a spray coating head (5) and an air knife leveling device (6) from front to back;
the production method comprises the following steps:
a. placing a non-woven fabric substrate of a flat film on an uncoiling frame (1);
b. the non-woven fabric base material firstly passes through the flattening device (2) under the action of the traction conveyor belt, and is smoother and more orderly under the actions of the flattening roller and the deviation correcting mechanism;
c. swinging the swinging coating head (3) within the range of 5-50 mm according to working conditions, and uniformly coating the casting film liquid on the non-woven fabric base material;
d. shaping the non-woven fabric base material coated with the casting solution in a first shaping groove (4) to form a bottom film of the multi-layer composite flat plate film;
e. the spray coating head (5) further uniformly coats the coating material on the bottom film of the multilayer composite flat film, and then the coating material is quickly dried under the blowing action of the air knife sweeping device (6);
f. the dried coating base film is transferred to a second shaping groove (7) for secondary shaping to form a semi-finished film of the multilayer composite flat film;
g. after the semi-finished product film of the multilayer composite flat film comes out of the second shaping groove (7), the spraying liquid is uniformly coated on the outer surface layer of the semi-finished product of the multilayer composite flat film under the action of the surface modification coating device (8);
h. and finally, heating and forming the finished product of the multilayer composite flat film coated with the spraying liquid in a heat setting device (9), and forming a coil shape through the coiling action of an automatic coiling device (10) to finish the preparation.
2. The production method of the production device of the multilayer composite flat sheet film according to claim 1, wherein: the first shaping groove (4) and the second shaping groove (7) are constant-temperature and constant-concentration shaping grooves, and shaping liquid in the shaping grooves is aqueous solution.
3. The production method of the production device of the multilayer composite flat sheet film according to claim 1, wherein: the flattening device (2) consists of a flattening roller and a deviation rectifying mechanism, and the flattening roller and the deviation rectifying mechanism are respectively used for flattening the base material and automatically rectifying.
4. The production method of the production device of the multilayer composite flat sheet film according to claim 1, wherein: the spraying coating head (5) is provided with a row of small holes for spraying, the diameter of the small holes is 0.2-2 mm, and the hole spacing is 3-10 mm.
5. The production method of the production device of the multilayer composite flat sheet film according to claim 1, wherein: the clearance of the air knife on the air knife leveling device (6) is 0.1-2 mm, and the working air pressure is 0.1-0.5 MPa.
6. The production method of the production device of the multilayer composite flat sheet film according to claim 1, wherein: the surface modification coating device (8) is a multi-pipe type aerosol spraying device, and the pipe spacing is 10-200 mm.
7. The production method of the production device of the multilayer composite flat sheet film according to claim 1, wherein: the heating element on the heat setting device (9) is a quartz tube.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711092756.3A CN107715703B (en) | 2017-11-08 | 2017-11-08 | Production device and method of multilayer composite flat plate film |
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| CN109772938B (en) * | 2019-01-28 | 2020-07-10 | 苏州天立达胶粘制品有限公司 | Silver membrane coiled material warpage changes and levels device |
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Effective date of registration: 20231117 Address after: 301B, No. 868-6 Wuxian Road, Graphene New Materials Industrial Park, Torch High tech Zone, Xiamen City, Fujian Province, 361000 Patentee after: XIAMEN ZHANGHUA ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Address before: 361000 Xiamen, Fujian, China (Fujian) free trade trial area Xiamen area 97 Xiangyu Road, Xiamen international shipping center D 8 8 03 units, Patentee before: XIAMEN SMMEM TECHNOLOGY CO.,LTD. |