CN100482434C - Polyimide film curtain coating technology and equipment - Google Patents
Polyimide film curtain coating technology and equipment Download PDFInfo
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- CN100482434C CN100482434C CNB2006100399407A CN200610039940A CN100482434C CN 100482434 C CN100482434 C CN 100482434C CN B2006100399407 A CNB2006100399407 A CN B2006100399407A CN 200610039940 A CN200610039940 A CN 200610039940A CN 100482434 C CN100482434 C CN 100482434C
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- polyimide film
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Abstract
A doctor blading process for preparing polyimide film includes such steps as coating the polyimic acid resin on steel band, using the hot liquid to heat and dry the front and back drums, steel band and the coated polyimic acid resin layer, and using hot gas to heat and dry the upper and lower steel band layers and said coated layer. The doctor blading apparatus is composed of drive mechanism, casing, moulding head, front and back drums, steel band, and the static pressure boxes.
Description
Affiliated technical field
The present invention relates to Kapton manufacture method and equipment, relate in particular to polyimide film curtain coating heating and drying method and equipment.
Background technology
Kapton is a kind of high performance organic polymer insulating materials, can be widely used in fields such as military affairs, satellite navigation, digital product, F.H level motor, computer, mobile phone with its flexible print circuit of making as basic material (FPC) etc.
On the synthetic steel band of liquid polyimides acid resin in die head is coated in slobbering machine, form uniform resinous coat, heat drying in machine, begin to take shape primary film with self-supporting body, deliver to postorder workshop section then and carry out that cyclisation is handled or stretched equipment carries out the drawing and setting cyclisation, obtain the Kapton product.
At present, heat drying in the machine in the polyimide film curtain coating method, all be to carry out heat drying along air channel and the reverse hot blast of sending into of steel band traffic direction, adopt the hydrostomia equipment of this heating and drying method, comprise drive system, casing, die head, preceding drum, back drum and steel band, drum casing before casing comprises, middle housing and back drum casing, preceding drum casing and back drum casing respectively comprise both sides wallboard and removable cover plate, before drum and back drum by central shaft and bearing fixing on the wallboard of both sides, at steel band upside fixed plate, make and form an air channel between this sheet material and steel band, the air channel is provided with the air channel import in the bottom of preceding drum, the air channel is provided with ducting outlet on the top of preceding drum, and hot blast enters the air channel and the polyimides acid resin of hydrostomia on steel band carried out heat drying from the air channel inlet, discharges along ducting outlet then.
There is following defective in above-mentioned polyimide film curtain coating method and apparatus:
(1) only has only the contrary steel band operation of hot blast heat drying, in the heat drying process, hot blast temperature constantly reduces, can not control along each section of steel band temperature, and along with the reduction of hot blast temperature, and the solvent in the hot blast increases, and further reduces the evaporation rate of solvent in the polyimides acid resin of hydrostomia on steel band;
(2) this heating and drying method makes in each cycle period of steel band, and the alternation temperature difference reaches about 150 ℃, the creep of steel band is quickened in running for a long time, makes the flatness variation of steel band minute surface, cause that film product is in uneven thickness, the color aberration becomes big, and shortened the service life of steel band significantly;
(3) because the reason of above-mentioned (1), the length that needs the lengthening steel band is to guarantee to have sufficiently long air channel, so that hot blast can evaporate the solvent in the polyimides acid resin and discharge as far as possible up hill and dale to the polyimides acid resin heat drying of hydrostomia on steel band the time, with regard to the whole length of the slobbering machine that must extend, increased the floor space of slobbering machine like this; Same reason owing to above-mentioned (1), the rotating speed of slobbering machine steel band can only slow down, and has so just influenced the production capacity of equipment.
Summary of the invention
In order to overcome above-mentioned defective, the purpose of this invention is to provide a kind of polyimide film curtain coating method and apparatus, can control the heat drying temperature effectively, by technic index the solvent in the polyimides acid resin is evaporated and discharge.
Polyimide film curtain coating method of the present invention comprises and will form uniform resinous coat on the synthetic steel band of liquid polyimides acid resin in die head is coated in slobbering machine, it is characterized in that with hot liquid the back drum heating in preceding drum in the preceding bulging casing and the back drum casing, through conduction of heat heating steel band and the back steel band on bulging on the preceding drum, this steel band after the heating carries out heat drying through the heat conduction to the polyimide acid resinous coat on this steel band, with hot gas to the upper strata steel band in the casing of slobbering machine stage casing and on the polyimide acid resinous coat carry out heat drying, with the lower floor's steel band in the low gaseous exchange saliva machine stage casing casing of the temperature of the aforementioned relatively gas of temperature and on the polyimide acid resinous coat cool off.
Further, the temperature of the described hot liquid that preceding drum in the preceding bulging casing is heated is lower than 90 ℃, is higher than 50 ℃, the temperature of the hot liquid that the back drum in the back drum casing is heated is lower than 200 ℃, is higher than 110 ℃, to the upper strata steel band in the casing of slobbering machine stage casing and on the polyimide acid resinous coat temperature of carrying out the hot gas of heat drying be lower than 200 ℃, be higher than 110 ℃, to the lower floor's steel band in the casing of slobbering machine stage casing and on the temperature of the polyimide acid resinous coat gas of lowering the temperature be lower than 100 ℃, be higher than 50 ℃.
Further, described to the upper strata steel band in the casing of slobbering machine stage casing and on the polyimide acid resinous coat hot gas that carries out heat drying be air, to the lower floor's steel band in the casing of slobbering machine stage casing and on the polyimide acid resinous coat gas of lowering the temperature also be air.
Further, described hot liquid is the thermal conductance deep fat.
Further, the described hot liquid that preceding drum in the preceding bulging casing is heated is a hot water, and the hot liquid that the back drum in the drum casing of back is heated is a conduction oil.
Polyimide film curtain coating equipment of the present invention comprises drive system, casing, die head, preceding drum, back drum and steel band, drum casing before casing comprises, middle housing and back drum casing, preceding drum casing and back drum casing respectively comprise both sides wallboard and removable cover plate, before drum and back drum by central shaft and bearing fixing on the wallboard of both sides, drum became upper strata steel band and lower floor's steel band with the back cydariform before steel band was walked around, drum all is the axles in midair that are provided with two runners with the central shaft of back drum before it is characterized in that, this axle head head connects swivel joint, preceding drum is equipped with bulging inner casing and drum coating with the back drum, be arranged to helical flow path with wallboard between drum inner casing and the drum coating, these helical flow path two ends respectively with axle in midair in two runners link to each other to form and flow into runner and discharge runner; Upper strata steel band in the casing of stage casing and lower floor steel band inboard and the outside are provided with plenum chamber.
Further, the above-mentioned plenum chamber that is arranged on upper strata steel band and the lower floor steel band inboard and the outside has the 2-10 group respectively.
Owing to adopted technique scheme, in preceding bulging casing and back drum casing with hot liquid to the preceding drum in the casing, back drum heating and indirectly to steel band and on the polyimide acid resinous coat carry out heat drying, utilize the direct transferring heat energy of metal, significantly improved heat transfer coefficient, again in the casing of stage casing with hot gas to steel band and on the resinous coat heat drying, by improving the flowing velocity of hot gas, accelerated heat is transmitted, in time take away the solvent of from resin, overflowing, improve the evaporation rate of solvent; Simultaneously by segmentation heat drying and cooling, make the steel band temperature difference in a cycle of operation unlikely very big, reduce the creep of steel band, guaranteed the flatness of steel band minute surface, thereby guaranteed the uniformity and the film product consistency of colour of film product thickness, prolonged the service life of steel band; Owing to, improved the thermal efficiency by segmentation heat drying and cooling, can shorten the length of steel band significantly, thereby shorten hydrostomia equipment total length, a large amount of saving invested.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is the front view of polyimide film curtain coating equipment of the present invention.
Fig. 2 is the A-A cutaway view of Fig. 1.
Among the figure: 1, liquid-inlet, 2, liquid outlet, 3, swivel joint, 3 ', swivel joint, 4, bearing, 5, cover plate, 5 ', cover plate, 6, drive system, 7, framed side wallboard, 7 ', framed side wallboard, 8, preceding drum, 9, preceding bulging inner casing, 10, wallboard, 11, preceding drum coating, 12, the back drum, 13, steel band, 14, casing, 15, gas feed, 16, gas vent, 17, resin inlet, 18, central shaft.
The specific embodiment
As Fig. 1, among the embodiment shown in Figure 2, polyimide film curtain coating equipment of the present invention comprises drive system 6, casing, die head, preceding drum 8, back drum 12 and steel band 13, drum casing before casing comprises, stage casing casing 14 and back drum casing, preceding drum casing has two framed side wallboards 7 and removable cover plate 5, preceding drum 8 is fixed on the both sides wallboard 7 by central shaft 18 and bearing 4, back drum casing also have two framed side wallboards 7 ' and removable cover plate 5 ', back drum 12 by central shaft and bearing fixing both sides wallboard 7 ' on, drum 8 and back drum 12 formed upper strata steel band and lower floor's steel bands before steel band 13 was walked around.Before the central shaft 18 of drum 8 be axle in midair, this in midair axle be provided with two runners, this axle head connection swivel joint 3, swivel joint 3 is provided with liquid-inlet 1 and liquid outlet 2; The same with the central shaft 18 of preceding drum 8, the central shaft of back drum 12 is axle in midair, this in midair axle be provided with two runners, this axle head connect swivel joint 3 ', swivel joint 3 ' be provided with liquid-inlet and liquid outlet.Before drum 8 be provided with bulging inner casing 9 and drum coating 11, be arranged to helical flow path with wallboard 10 between drum inner casing 9 and the drum coating 11, these helical flow path two ends respectively with axle in midair in two runners connect, form and flow into runner and discharge runner; Back drum 12 and preceding drum 8 the same bulging inner casing and the drum coatings of being provided with are arranged to helical flow path with wallboard between drum inner casing and the drum coating, the two ends of this helical flow path respectively with this back drum in midair two runners in the axle connect, form and flow into runner and discharge runner.
One side of slobbering machine stage casing casing 14 is provided with 8 groups of gas passage mouths, and every group includes a gas feed 15 and a gas vent 16; The casing in the steel band outside, upper strata is provided with two groups of gas passages, also is provided with two groups of gas passages on the casing of steel band inboard, upper strata; The casing in the lower floor steel band outside is provided with two groups of gas passages, also is provided with two groups of gas passages on the casing of lower floor steel band inboard.In casing, a plenum chamber all is installed in every group of place of 8 groups of above-mentioned hot-gas channel mouths, the gas feed of plenum chamber and outlet respectively with casing on corresponding gas feed 15 be connected with gas vent 16.
The liquid polyimides acid resin that with temperature is 45 ℃ enters the slobbering machine die head from the resin inlet 17 of Fig. 1, slobbering machine shown in Figure 2, forms uniform resinous coat then on the steel band in die head is coated in slobbering machine 13.The hot water that with temperature is 80 ℃ heats the preceding drum 8 in the preceding bulging casing, and by heat conduction to the steel band 13 on preceding drum 8 and on the polyimide acid resinous coat carry out heat drying, specifically be that 80 ℃ the hot water liquid-inlet 1 from swivel joint 3 is flowed into, flow through in the helical flow path between drum inner casing 9 before flowing into behind the runner in the central shaft 18 of axle in midair and the preceding drum coating 11, again another runner in axle in midair and liquid outlet 2 outflows of swivel joint 3.Like this, temperature is behind 80 ℃ the helical flow path of flow of hot water in preceding drum 8, just with drum before the heat transferred 8 and steel band 13 on the preceding drum and the polyimide acid resinous coat on the steel band 13, plays the effect of heat drying.
The conduction oil that with temperature is 180 ℃ is to back drum 12 heating in the drum casing of back, and through the heat conduction to around after on the drum 12 steel band 13 and on the polyimide acid resinous coat carry out heat drying.Specifically be with 180 ℃ conduction oil from swivel joint 3 ' liquid-inlet flow into, the back drum of flowing through flows into behind the runner in the axle in the helical flow path between back drum inner casing and the back drum coating in midair, again through this in midair another runner in the axle, swivel joint 3 ' the liquid outlet outflow.Like this, temperature be 180 ℃ the thermal conductance stream of hot oil through after behind the helical flow path in the drum, just with drum after the heat transferred 12 and around after steel band 13 on the drum and the polyimide acid resinous coat on the steel band 13, play the effect of heat drying.
With temperature be in 180 ℃ the hot-air convection saliva machine stage casing casing 14 the upper strata steel band and on the polyimide acid resinous coat carry out heat drying.The import of gas feed 15 in 180 ℃ hot-air reaches outside the steel band of upper strata on the side box body and coupled plenum chamber enters in the plenum chamber, and to the upper strata steel band and on the polyimide acid resinous coat jet, play the heat drying effect, after the solvent of overflowing in the polyimide acid resinous coat is discharged and taken away to the gas vent 16 on the outlet of plenum chamber and the connected casing.
With temperature be in 70 ℃ the cross-ventilation saliva machine stage casing casing 14 lower floor's steel band and on the polyimide acid resinous coat lower the temperature.The import of gas feed in 70 ℃ air reaches outside lower floor's steel band on the side box body and coupled plenum chamber enters in the plenum chamber, and to lower floor's steel band and on the polyimide acid resinous coat jet, play cooling effect, after the solvent of overflowing in the polyimide acid resinous coat is discharged and taken away to the gas vent on the outlet of plenum chamber and the connected casing.
Claims (7)
1, a kind of polyimide film curtain coating method, comprise and form uniform resinous coat on the steel band of liquid polyimides acid resin in die head is coated in slobbering machine that will synthesize, it is characterized in that with hot liquid the back drum heating in preceding drum in the preceding bulging casing and the back drum casing, the steel band that the heating of process conduction of heat is roused with the back around the steel band on the preceding drum, this steel band after the heating carries out heat drying through the heat conduction to the polyimide acid resinous coat on this steel band, with hot gas to the upper strata steel band in the casing of slobbering machine stage casing and on the polyimide acid resinous coat carry out heat drying, with the lower floor's steel band in the low gaseous exchange saliva machine stage casing casing of the temperature of the aforementioned relatively gas of temperature and on the polyimide acid resinous coat cool off.
2, polyimide film curtain coating method according to claim 1, the temperature that it is characterized in that the hot liquid that the above-mentioned preceding drum in the preceding bulging casing heats is lower than 90 ℃, be higher than 50 ℃, the temperature of the hot liquid that the back drum in the back drum casing is heated is lower than 200 ℃, be higher than 110 ℃, to the upper strata steel band in the casing of slobbering machine stage casing and on the polyimide acid resinous coat temperature of carrying out the hot gas of heat drying be lower than 200 ℃, be higher than 110 ℃, to the lower floor's steel band in the casing of slobbering machine stage casing and on the temperature of the polyimide acid resinous coat gas of lowering the temperature be lower than 100 ℃, be higher than 50 ℃.
3, polyimide film curtain coating method according to claim 2, it is characterized in that above-mentioned to the upper strata steel band in the casing of slobbering machine stage casing and on the polyimide acid resinous coat hot gas that carries out heat drying be air, to the lower floor's steel band in the casing of slobbering machine stage casing and on the polyimide acid resinous coat gas of lowering the temperature also be air.
4,, it is characterized in that described hot liquid is the thermal conductance deep fat according to claim 2 or 3 described polyimide film curtain coating methods.
5, according to claim 2 or 3 described polyimide film curtain coating methods, it is characterized in that the described hot liquid that preceding drum in the preceding bulging casing is heated is a hot water, the hot liquid that the back drum in the drum casing of back is heated is a conduction oil.
6, a kind of polyimide film curtain coating equipment that is applicable to the polyimide film curtain coating method of claim 1, comprise drive system (6), casing, die head, preceding drum (8), back drum (12) and steel band (13), drum casing before casing comprises, stage casing casing (14) and back drum casing, preceding drum casing comprises both sides wallboard (7) and removable cover plate (5), back drum casing comprises both sides wallboard (7 ') and removable cover plate (5 '), preceding drum (8) is fixed on the both sides wallboard (7) by central shaft (18) and bearing (4), back drum (12) by central shaft and bearing fixing on both sides wallboard (7 '), steel band (13) walks around preceding drum (8) and back drum (12) forms upper strata steel band and lower floor's steel band, the central shaft (18) that it is characterized in that preceding drum (8) is axle in midair, this is provided with two runners in axle in midair, this axle head connects swivel joint (3), preceding drum (8) is provided with bulging inner casing (9) and drum coating (11), be arranged to helical flow path with wallboard (10) between drum inner casing (9) and the drum coating (11), these helical flow path two ends respectively with axle in midair in two runners connect, form and flow into runner and discharge runner; The central shaft of back drum (12) is axle in midair, this in midair axle be provided with two runners, this axle head connects swivel joint (3 '), back drum (12) is provided with bulging inner casing and drum coating, be arranged to helical flow path with wallboard between drum inner casing and the drum coating, the two ends of this helical flow path respectively with this back drum in midair two runners in the axle connect, form and flow into runner and discharge runner; Upper strata steel band in the stage casing casing (14) and lower floor steel band inboard and the outside are provided with plenum chamber.
7, polyimide film curtain coating equipment according to claim 8 is characterized in that the above-mentioned plenum chamber that is arranged on upper strata steel band and the lower floor steel band inboard and the outside has the 2-10 group respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100399407A CN100482434C (en) | 2006-04-27 | 2006-04-27 | Polyimide film curtain coating technology and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100399407A CN100482434C (en) | 2006-04-27 | 2006-04-27 | Polyimide film curtain coating technology and equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1868716A CN1868716A (en) | 2006-11-29 |
| CN100482434C true CN100482434C (en) | 2009-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100399407A Expired - Fee Related CN100482434C (en) | 2006-04-27 | 2006-04-27 | Polyimide film curtain coating technology and equipment |
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| CN (1) | CN100482434C (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101249701B (en) * | 2008-04-14 | 2010-09-08 | 李清让 | Equipment for producing polyvinyl alcohol film by roller process |
| CN102357965B (en) * | 2011-09-08 | 2013-09-18 | 桂林电器科学研究院有限公司 | Hot-air cycling system for slobbering machine and use method |
| CN102416684B (en) * | 2011-09-24 | 2013-09-18 | 桂林电器科学研究院有限公司 | Adhesive tape processing method in film production of slobbering machine |
| CN102303388B (en) * | 2011-09-24 | 2013-06-26 | 桂林电器科学研究院 | Method for adhesive tape treatment in production of thin film by casting machine |
| CN104260257B (en) * | 2014-09-19 | 2017-01-25 | 桂林电器科学研究院有限公司 | Method and device for improving thickness uniformity of polyamide acid film |
| CN105860075B (en) * | 2016-04-26 | 2019-06-11 | 无锡顺铉新材料有限公司 | A kind of colorless and transparent low dielectric coefficient polyimide film and preparation method thereof |
| CN105773890B (en) * | 2016-05-03 | 2017-10-17 | 淮安科润膜材料有限公司 | A kind of film-removing device of perfluorinated ionic membrane steel band casting machine |
| CN110126157A (en) * | 2019-06-20 | 2019-08-16 | 山东拓研新材料科技有限公司 | A kind of preparation process of novel functional hot melt adhesive film |
| CN116423726A (en) * | 2023-04-12 | 2023-07-14 | 山东欧亚新材料科技有限公司 | Baking oven of casting machine and novel thermal polyimide film production process |
| CN116141559A (en) * | 2023-04-17 | 2023-05-23 | 山东欧亚高分子材料有限公司 | Drying method for reducing shrinkage rate of polyimide film based on casting machine |
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2006
- 2006-04-27 CN CNB2006100399407A patent/CN100482434C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1868716A (en) | 2006-11-29 |
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| C14 | Grant of patent or utility model | ||
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Liyang Huajing Synthetic Material Co., Ltd. Assignor: Liyang Huajing Electronic Material Co., Ltd.|Qian Shichang Contract record no.: 2010320001062 Denomination of invention: Polyimide film curtain coating technology and equipment Granted publication date: 20090429 License type: Exclusive License Open date: 20061129 Record date: 20100730 |
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| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: Liyang Huajing Synthetic Material Co., Ltd. Assignor: Liyang Huajing Electronic Material Co., Ltd.|Qian Shichang Contract record no.: 2010320001062 Date of cancellation: 20120406 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090429 Termination date: 20170427 |
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| CF01 | Termination of patent right due to non-payment of annual fee |