CN204354377U - Improve the facility of Polyamic Acid Film side imines rate - Google Patents
Improve the facility of Polyamic Acid Film side imines rate Download PDFInfo
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- CN204354377U CN204354377U CN201420856414.XU CN201420856414U CN204354377U CN 204354377 U CN204354377 U CN 204354377U CN 201420856414 U CN201420856414 U CN 201420856414U CN 204354377 U CN204354377 U CN 204354377U
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- polyamic acid
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Abstract
The utility model discloses a kind of facility improving Polyamic Acid Film side imines rate, this facility is before stretcher, above and/or under film side parts, multiple row heating tube is installed by side, reduces gradually with close to outer rim heating tube and film surface vertical range, to two avris heating before stretching.Before stretcher, be provided with the chemical imidization spray equipment of spray head and bath foam pipe at film side, chemical imidization bath foam drenched to film side side spray, carries out local imidization.In stretcher, above and/or under side parts, side arranges the plenum chamber improving temperature, improves film side side surface temperature, accelerates imidization.Before imination equipment high-temperature region, above and/or under film side parts, side installs auxiliary heating pipe additional, makes the leading imidization of film avris, gains in strength.The utility model is easy to implement, and improve film avris imidization rate, making it intensity increases, and avoids clipping broken and pulls open, and improves thin film yield.
Description
Technical field
The utility model relates to Kapton manufacturing equipment, is specially a kind of facility improving Polyamic Acid Film side imines rate.
Background technology
Kapton is the macromolecular material with high strength, high tenacity, abrasion performance, the excellent properties such as high temperature resistant, corrosion-resistant, is the predominating insulation making various medium-to-high grade electrotechnical, electronic components and parts, is widely used in electrotechnical, electronic industry.The preparation technology of current Kapton is with polyamic acid resin solution for raw material, and on slobbering machine, salivation obtains the Polyamic Acid Film of self-supporting, then through adding hot-stretch, high temperature imidization, cooling and shaping process obtain Kapton.
The designing requirement of and high reliability light, thin, short, little along with downstream application product, the film thickness specification of the market demand is tending towards slimming, to its technology of preparing, product quality particularly product yield all have higher requirement.
In Kapton preparation process, the conventional manufacturing process of drawing and setting or tensioning sizing that adopts reaches required thickness and traditional performance.All need two sides gripping Kapton semi-finished product Polyamic Acid Film when drawing and setting or tensioning sizing, rely on the clamping device of film both sides to apply horizontal force to film under the high temperature conditions, namely cross directional stretch is carried out to film.Also need during longitudinal stretching to grip film dual-side, avoid film to reduce width to central reduction distortion.
Such as, when Kapton is produced, normally polyamic acid resin is shaped to Polyamic Acid Film by salivation mode on slobbering machine, carries out imidization process by high temperature furnace afterwards and obtain Kapton.The bilateral of semi-finished product film to be gripped in imidization, make film under clamp position, carry out cross directional stretch or tensioning process, and keep this state to complete high temperature imidization, to improve the traditional performance of film.
The clamping device of existing film line both sides is mainly and is arranged on chain pincers on the chain of ring-shaped guide rail or pin is buckled.The imidization that vertical cross directional stretch all will carry out high-temperature process, particularly Polyamic Acid Film to film needs the process of higher temperature, and maximum processing temperature can reach 500 DEG C.Chain in production line and on chain pincers or pin buckle temperature in high temperature environments and also increase, when stretching entry position clamping film very easily because high temperature causes film side to clip broken or tear, the film of side breakage in follow-up stretching, imidization, shape and open in the technical process such as folder and easily buckle thorn button bit in chain pincers pincers mouth position or pin and put and cause de-pincers or dropout and pulled open, reduce film stretching quality, even film cannot normally rolling, reduce film product yield, have a strong impact on film line output.
Meanwhile, the edge of Polyamic Acid Film upwarps phenomenon due to too thin easy generation, makes film side edge break build up double-deck limit during the clamping of chain pincers.Running into high temperature in the clamping process of double-deck limit makes chain pincers clip position film easily tear, and causes product can not normally rolling equally, reduction film product yield.
In actual production line, Kapton open pincers position close to traction wrap-up, when driving pincers, film is subject to the comprehensive functions such as tensile stress, drawing tension and winding tension and easily occurs the rupture of membranes such as raw edges, transverse breakage phenomenon, so that film cannot normally rolling, have a strong impact on thin film yield, reduce film yield.
In order to solve edge damage in Kapton preparation process, the problems such as disconnected film, in recent years there is relevant patent application, as the Chinese utility model patent " the entering pincers guiding device of membrane production equipment " that notification number is CN202245464U, publication number is the Chinese invention patent " the chain pincers cooling device of film production machinery " of CN102441987A, publication number is the Chinese invention patent " the opening pincers device in advance of film line " of CN102431161A, publication number is the Chinese invention patent " film clamping device of film of film stretching sizing or tensioning modular system " of CN102390112A, notification number is the Chinese utility model patent " a kind of solution film stretching rupture of membranes and thickness homogeneous system " of CN203236699U, wherein individually disclose into pincers guiding device, chain pincers cooling device, drive pincers device and clamping device etc. in advance, although clamping device is caused clip broken or Tear Film side problem some reduce, but and fail to eliminate this type of fault completely.And these devices all need to transform existing apparatus for production line or replace, apparatus structure is comparatively complicated, also needs higher improvement cost, therefore is difficult to extensively practice.
In addition publication number is the Chinese invention patent " adhesive tape processing method in film production of slobbering machine " of CN102416684A, publication number is the Chinese invention patent " method for adhesive tape treatment in production of thin film by casting machine " of CN102303388A, notification number is the Chinese utility model patent " polyimide film producing device of automatic erasing releasing agent " etc. of CN202147343U is cause rupture of membranes by improving manufacturing process process salivation adhesive tape, disconnected films etc. are abnormal, adjusting process parameter is more, adjustable range is large, particularly introduce as wiping releasing agent can cause film too smooth cannot normal use in the side effect etc. of downstream product.
Utility model content
The purpose of this utility model is a kind of facility improving Polyamic Acid Film side imines rate of design, heating tube is installed in above the side parts peeling off one fixed width in rear film traveling process at Polyamic Acid Film from steel band and/or below, with close to outer rim, heating tube and film surface distance reduce gradually, make the temperature of film side parts raise imines rate to improve, reduce the polyamide acid content of film side parts, thus the intensity of Polyamic Acid Film side is increased, not easily clipped broken or the fault of raw edges by during clamping, ensure that the quality of film, improve thin film yield.
A kind of facility improving Polyamic Acid Film side imines rate of the utility model design comprises mould, the circulation steel band of the shaping polyamic acid liquid film of carrying salivation and baking oven, thereafter be stretcher and imination equipment, Polyamic Acid Film is after steel band stripping, before entering stretcher, in film traveling process its laterally within the scope of wide X the top of side parts and/or below heating tube is installed, described X=20 ~ 200mm, within the scope of wide X, above film and/or equally spaced 2 ~ 6 row length directions of the arranged beneath heating tube parallel with film direct of travel, the length L=u*v of heating tube row, wherein u represents film gait of march, v represents the film processing time, and 0.5m/min≤u≤20.0m/min, 8 seconds≤v≤80 second.Heating tube and film surface vertical range are m, reduce gradually with close to film outer rim m.Above film outer rim and/or the heating tube of below and film surface apart from minimum be M, M=10 ~ 30mm, m=(1 ~ 8) M.Above film two side parts and/or the setting height(from bottom) of below heating tube with the vertical plane symmetry on film longitudinal centre line.
When carrying out chemical imidization, the Polyamic Acid Film peeled off from steel band transmits on stroke, before entering stretcher, film side arranges chemical imidization spray equipment, spray equipment comprises spray head and bath foam pipe, and spray head is installed, described X=20 ~ 200mm in above the film within the scope of horizontal wide X and/or below, spray head connects shower liquid pump through bath foam pipe, and shower liquid pump connects bath foam basin.Spray head is spray face towards film surface, and width is X, the uniform nozzle towards film surface in spray face.Spray face is L near the length of the nozzle file of film edge, is decreased to 0 gradually with the length close to thin film center, nozzle file.The time that side parts film is sprayed increases gradually with close to edge.
Below spray head, have bath foam feeder, the downward projection of spray head drops in bath foam feeder.Bath foam feeder is connected with bath foam basin.The bath foam of spray flows in bath foam feeder through film, returns recycling use in bath foam basin.
Be provided with air knife in the spray head end near stretcher and/or the spray head side near thin film center, the air knife length near the spray head end of stretcher is greater than X, and the air knife length near thin film center spray head side is greater than L.The bath foam of air knife removing film surface, and block the central area that bath foam flows into film.
The temperature of side parts film surface when for a change stretching, in stretcher, above side parts and/or below arrange and improve the plenum chamber of temperature, the plenum chamber width Y=20 ~ 200mm of side parts, length is identical with the stretch zones length in stretcher, the plenum chamber of side parts is connected with the heating facility improving temperature, middle part plenum chamber hot blast temperature is G, and the hot blast temperature of side parts plenum chamber is (1.0 ~ 1.5 times) G, is up to 375 DEG C.
In imination equipment, before entering high-temperature region, for improving the temperature of side parts film surface, auxiliary heating pipe is installed additional in the top of the side parts of the wide Z of film and/or below, described Z=20 ~ 200mm, described auxiliary heating pipe is arranged as equally spaced 2 ~ 6 row, length direction is parallel with film direct of travel, the front end of auxiliary heating pipe row is equal with the entrance point of imination equipment, before extending to the high-temperature region of imination equipment, namely the length of auxiliary heating pipe row is 1/2 to 3/4 of imidization zone length, auxiliary heating pipe and film surface vertical range are k, reduce gradually with close to film outer rim k.Above film outer rim and/or the auxiliary heating pipe of below and film surface apart from minimum be K, K=10 ~ 30mm, k=(1 ~ 5) K.
Compared with prior art, a kind of advantage improving the facility of Polyamic Acid Film side imines rate of the utility model is: 1, the imines rate of Polyamic Acid Film two side parts improves, make it intensity to increase, namely when this after-drawing or tensioning, the chain pincers of clamping device or the thin film strength of fibula origin of force increase, make because clipping broken, pulling open the de-pincers that causes or dropout fault not easily occurs, by testing, the situation of edge damage, disconnected film seldom occurs, and film product yield improves greatly; 2, this facility is easy to realize, only need regulate the time of chemical imidization process, heating tube and the vertical range of film surface or the plenum chamber hot blast temperature of independent temperature control, the imines rate of Polyamic Acid Film two side parts can be controlled, obtain the Polyamic Acid Film that both sides are strengthened.
Accompanying drawing explanation
Fig. 1 is local heat pipe schematic diagram above the film side parts before the facility embodiment self-supporting Polyamic Acid Film of this raising Polyamic Acid Film side imines rate enters stretcher after steel band stripping, in traveling process.
Fig. 2 is the cross-sectional view of Fig. 1 avris.
Fig. 3 is that the facility embodiment of this raising Polyamic Acid Film side imines rate transmits on stroke at the self-supporting Polyamic Acid Film peeled off from steel band, before entering stretcher, at the chemical imidization facility schematic diagram that film side is arranged.
Fig. 4 is that the A-A of Fig. 3 is to sectional view;
Fig. 5 be this raising Polyamic Acid Film side imines rate facility embodiment transverse stretching machine in the plenum chamber cross sectional representation of stretch zones.
Fig. 6 be this raising Polyamic Acid Film side imines rate facility embodiment transverse stretching machine in the auxiliary heating pipe top view of imidization region avris.
Fig. 7 is the cross-sectional view of an avris of Fig. 6.
Number in the figure is: 1, film, 2, heating tube, 3, air knife, 4, bath foam feeder, 5, spray head, 6, bath foam basin, 7, bath foam pipe, 8, plenum chamber, 9, auxiliary heating pipe, 10, imidization heating tube.
Detailed description of the invention
The facility embodiment of this raising Polyamic Acid Film side imines rate comprises mould, the circulation steel band of the shaping polyamic acid liquid film of carrying salivation and baking oven, thereafter be transverse stretching machine, transverse stretching machine is divided into stretch zones and imidization region, in two regions of transverse stretching machine, complete cross directional stretch and imidization respectively.
Polyamic Acid Film 1 is after steel band stripping, before entering transverse stretching machine, above side parts, heating tube 2 is installed within the scope of its horizontal wide X=100mm in film 1 traveling process, as shown in Figure 1, the heating tube 2 that laterally equidistantly arrangement 4 row length directions are parallel with film 1 direct of travel within the scope of wide 100mm, the length L=u*t that heating tube 2 arranges, wherein u represents film 1 gait of march, this routine u=6.0m/min, t represent film 1 processing time, this routine t=45 second, this routine L=4.5m.As shown in Figure 2, the heating tube of this example above film 1 outer rim 2 and the minimum M=20mm of the surperficial vertical range of film 1, strengthening gradually with leaving film 1 outer rim m, is 60mm with the top heating tube 2 at film 1 outer rim horizontal range 100mm place and the vertical range on film 1 surface.The self-supporting Polyamic Acid Film 1 peeled off from steel band is before entering transverse stretching machine, heated by the heating tube 2 installed above it within the scope of the film 1 side parts X=100mm advanced, this routine film 1 outer fringe surface heating-up temperature reaches 180 DEG C, drops to room temperature by edge gradually to center position film 1 surface temperature.The side parts local heat time is 60 seconds.
Polyamic Acid Film 1 is after steel band stripping, before entering transverse stretching machine, film 1 side arranges chemical imidization spray equipment, as shown in Figure 3, spray equipment comprises spray head 5 and bath foam pipe 7, install spray head 5 above the film 1 of this example within the scope of horizontal wide X=120mm, spray head 5 connects shower liquid pump through bath foam pipe 7, and shower liquid pump connects bath foam basin 6.As shown in Figure 4, spray head 5 is spray face towards film 1 surface, and width is 120mm, the uniform nozzle towards film 1 surface in spray face.Spray face is 4.5m near the length of the nozzle file at film 1 edge, is decreased to 0 gradually with the length close to film 1 center, nozzle file.Below spray head 5, have bath foam feeder 4, the downward projection of spray head 5 drops in bath foam feeder 4.Bath foam feeder 4 is connected with bath foam basin 6.The bath foam of spray flows in bath foam feeder 4 through film 1, returns recycling use in bath foam basin 6.From the Polyamic Acid Film 1 that steel band is peeled off, before entering transverse stretching machine, spray equipment sprays chemical imidization bath foam 56 seconds to the side parts of the wide X=120mm scope of film 1, carries out topochemistry imidization.
This example is all provided with air knife 3 in spray head 5 end near transverse stretching machine and spray head 5 side near thin film center, and air knife 3 length near spray head 5 end of transverse stretching machine is 200mm, and air knife 3 length near spray head 5 side at film 1 center is 5.0m.
The plenum chamber 8 of independent temperature control is set, the plenum chamber 8 width Y=120mm of side parts, as shown in Figure 5 above the stretch zones side parts of this example in transverse stretching machine.The length of this routine plenum chamber is all 7.5m mutually with the stretch zones length of transverse stretching machine.Above film 1 liang of side parts, the installation site of the plenum chamber 8 of independent temperature control is with the vertical plane symmetry on film 1 longitudinal centre line.The plenum chamber 8 of side parts is connected with the heating facility improving temperature, this example middle part plenum chamber hot blast temperature 210 DEG C, side parts plenum chamber 8 hot blast temperature be in the middle part of 1.25 times of plenum chamber hot blast temperature, be 262.5 DEG C.
The imidization region of this example in transverse stretching machine, before entering high-temperature region, within the scope of the wide Z=120mm of side parts, the auxiliary heating pipe 9 that equally spaced 4 row length directions are parallel with film 1 direct of travel is arranged above film 1, the imidization zone length of the length that auxiliary heating pipe 9 arranges and transverse stretching machine 3/4 be 6.0m, as shown in Figure 6, in figure, original imidization heating tube 10 is vertical with film 1 direct of travel, the front end that auxiliary heating pipe 9 arranges is equal with the entrance point of imination equipment, before extending to the high-temperature region of imination equipment.As shown in Figure 7, auxiliary heating pipe 9 and the surperficial vertical range of film 1 are k, reduce gradually with close to film 1 outer rim k, the auxiliary heating pipe 9 of this example above film 1 outer rim is minimum with film 1 surface distance is K, K=30mm is 80mm with the top auxiliary heating pipe 9 at film 1 outer rim horizontal range 120mm place and the vertical range on film 1 surface.Above film 1 liang of side parts, the setting height(from bottom) of auxiliary heating pipe 9 is with the vertical plane symmetry on film 1 longitudinal centre line.Polyamic Acid Film 1 in this routine transverse stretching machine imidization region, heated further by the auxiliary heating pipe 9 installed above it within the scope of side parts Z=120mm before entering high-temperature region, surface temperature H=320 DEG C in the middle part of Polyamic Acid Film 1 ~ 450 DEG C raise gradually, within the scope of the wide Z=120mm of this routine film 1 outer rim film 1 surface temperature higher than middle part film 1 surface temperature 70 DEG C ~ 200 DEG C, drop to center position film 1 surface temperature identical with middle part film 1 surface temperature gradually by edge, be up to 650 DEG C.
With imines rate evenly for the film of Q=32% is for comparative example, in the cross directional stretch of the same terms and the operation of tensioning imidization, compare with the film of the present embodiment process, result is as shown in table 1:
The film of table 1 the present embodiment process and comparative example film each operation processing situation comparison sheet
| The present embodiment | Comparative example | |
| Enter and horizontally draw operation front middle part imines rate | 32 | 32 |
| Enter and horizontally draw the maximum imines rate of operation cephalolateral margin | 64 | 32 |
| Horizontal torn selvedge number (individual/h) | 0.002 | 1.041 |
| Horizontally break film number (secondary/h) | 0 | 0.9 |
| Enter imidization operation front middle part imines rate | 46 | 46 |
| Enter the maximum imines rate of imidization operation cephalolateral margin | 78 | 46 |
| Imidization edge damage number (individual/h) | 0.001 | 0.896 |
| Imidization is broken film number (secondary/h) | 0 | 0.75 |
| Enter high temperature imidization front middle part imines rate | 68 | 68 |
| Enter the maximum imines rate of high temperature imidization cephalolateral margin | 86 | 68 |
| High temperature imidization edge damage number (individual/h) | 0.001 | 0.802 |
| High temperature imidization is broken film number (secondary/h) | 0 | 0.72 |
| Horizontally to draw and the edge damage sum of imidization operation (individual/h) | 0 | 0.851 |
| Horizontally draw the disconnected film sum (individual/h) with imidization operation | 0 | 0.73 |
| Thin film yield (%) | 100 | 86 |
| Film yield (%) | 98 | 74 |
Adopt the utility model to improve the facility of Polyamic Acid Film side imines rate, make the imines rate of imines rate apparently higher than central film portion of Polyamic Acid Film side parts, the intensity of film avris improves.0.2% of traditional films is only at the horizontal edge damage number of operation that draws, in imidization operation, edge damage number of times also obviously reduces, in stretching on Production Line for Polyimide Film and tensioning imidization, total disconnected film number of times is tending towards 0, and product yield is tending towards 100.0%, and product yield is up to 98.0%.
Above-described embodiment, be only the specific case further described the purpose of this utility model, technical scheme and beneficial effect, the utility model is not defined in this.All make within scope of disclosure of the present utility model any amendment, equivalent replacement, improvement etc., be all included within protection domain of the present utility model.
Claims (6)
1. one kind is improved the facility of Polyamic Acid Film side imines rate, the facility of the preparation method of the Polyamic Acid Film that side imines rate improves comprises mould, the circulation steel band of the shaping polyamic acid liquid film of carrying salivation and baking oven, thereafter be stretcher and imination equipment, it is characterized in that:
Polyamic Acid Film (1) is after steel band stripping, before stretching, in film (1) traveling process its laterally within the scope of wide X the top of side parts and/or below heating tube (2) is installed, described X=20 ~ 200mm, at film (1) top and/or equally spaced 2 ~ 6 row length directions of the arranged beneath heating tube (2) parallel with film (1) direct of travel within the scope of wide X, the length L=u*v that heating tube (2) arranges, wherein u represents film gait of march, v represents film (1) processing time, and 0.5m/min≤u≤20.0m/min, 8 seconds≤v≤80 second, heating tube (2) and film (1) surperficial vertical range are m, reduce gradually with close to film (1) outer rim m, above film (1) outer rim and/or the heating tube (2) of below and film (1) surface distance minimum be M, M=10 ~ 30mm, m=(1 ~ 8) M.
2. the facility of raising Polyamic Acid Film side imines rate according to claim 1, is characterized in that:
The Polyamic Acid Film peeled off from steel band transmits on stroke, before stretching, at film (1) side, chemical imidization spray equipment is set, spray equipment comprises spray head (5) and bath foam pipe (7), spray head (5) is installed in top within the scope of film (1) laterally wide X and/or below, described X=20 ~ 200mm, (5 connect shower liquid pump through bath foam pipe (7) to spray head, and shower liquid pump connects bath foam basin (6); Spray head (5) towards film (1) surface be spray face, width is X, the uniform nozzle towards film (1) in spray face; Spray face is L near the length of the nozzle file at film (1) edge, is decreased to 0 gradually with the length close to film (1) center, nozzle file.
3. the facility of raising Polyamic Acid Film side imines rate according to claim 2, is characterized in that:
Described spray head (5) below, have bath foam feeder (4), the downward projection of spray head (5) drops in bath foam feeder (4).
4. the facility of raising Polyamic Acid Film side imines rate according to claim 2, is characterized in that:
In spray head (5) end near stretcher and/or spray head (5) side near film (1) center, air knife (3) is installed, air knife (3) length near spray head (5) end of stretcher is greater than X, and air knife (3) length near spray head (5) side at film (1) center is greater than L.
5. the facility of raising Polyamic Acid Film side imines rate according to claim 1, is characterized in that:
In stretcher, above side parts and/or below arrange and improve the plenum chamber (8) of temperature, plenum chamber (8) width Y=20 ~ 200mm of side parts, length is identical with the stretch zones length in stretcher, the plenum chamber (8) of side parts is connected with the heating facility improving temperature, middle part plenum chamber hot blast temperature is G, the hot blast temperature of side parts plenum chamber (8) is (1.0 ~ 1.5) G of middle part plenum chamber hot blast temperature, is up to 375 DEG C.
6. the facility of raising Polyamic Acid Film side imines rate according to claim 1, is characterized in that:
Auxiliary heating pipe (9) is installed additional in the top of the side parts of film (1) wide Z and/or below in imination equipment, described Z=20 ~ 200mm, described auxiliary heating pipe (9) is arranged as equally spaced 2 ~ 6 row, length direction is parallel with film (1) direct of travel, the front end that described auxiliary heating pipe (9) arranges is equal with the entrance point of imination equipment, before extending to the high-temperature region of imination equipment, namely the length that auxiliary heating pipe (9) arranges is 1/2 to 3/4 of imidization zone length, auxiliary heating pipe (9) and film (1) surperficial vertical range are k, reduce gradually with close to film (1) outer rim k, above film (1) outer rim and/or the auxiliary heating pipe (9) of below and film (1) surface distance minimum be K, K=10 ~ 30mm, k=(1 ~ 5) K.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420856414.XU CN204354377U (en) | 2014-12-30 | 2014-12-30 | Improve the facility of Polyamic Acid Film side imines rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420856414.XU CN204354377U (en) | 2014-12-30 | 2014-12-30 | Improve the facility of Polyamic Acid Film side imines rate |
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| Publication Number | Publication Date |
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| CN204354377U true CN204354377U (en) | 2015-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420856414.XU Withdrawn - After Issue CN204354377U (en) | 2014-12-30 | 2014-12-30 | Improve the facility of Polyamic Acid Film side imines rate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104497340A (en) * | 2014-12-30 | 2015-04-08 | 桂林电器科学研究院有限公司 | Method and facility for improving amination rate of side of polyamide acid film |
| CN112020413A (en) * | 2018-04-26 | 2020-12-01 | 柯尼卡美能达株式会社 | Method for manufacturing optical film |
-
2014
- 2014-12-30 CN CN201420856414.XU patent/CN204354377U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104497340A (en) * | 2014-12-30 | 2015-04-08 | 桂林电器科学研究院有限公司 | Method and facility for improving amination rate of side of polyamide acid film |
| CN104497340B (en) * | 2014-12-30 | 2017-07-14 | 桂林电器科学研究院有限公司 | Improve the method and facility of Polyamic Acid Film side imines rate |
| CN112020413A (en) * | 2018-04-26 | 2020-12-01 | 柯尼卡美能达株式会社 | Method for manufacturing optical film |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150527 Effective date of abandoning: 20170714 |
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| AV01 | Patent right actively abandoned |