CN208714442U - A kind of Kapton film die - Google Patents
A kind of Kapton film die Download PDFInfo
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- CN208714442U CN208714442U CN201821433872.7U CN201821433872U CN208714442U CN 208714442 U CN208714442 U CN 208714442U CN 201821433872 U CN201821433872 U CN 201821433872U CN 208714442 U CN208714442 U CN 208714442U
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- kapton
- wall
- metal outer
- slit
- die head
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Abstract
The utility model relates to a kind of Kapton film dies, it is characterized in that, die head includes metal outer wall, metal outer wall, which is integrally formed, forms liquid storage chamber in inside, metal outer wall is welded on the top that Kapton supporting part is fixed and be suspended on fixed bracket and is lined with tetrabutyl benzotriazole salt erosion resistant coating on the inside of Kapton supporting part 4-20mm, metal outer wall；Upper end offers feed inlet, lower end has the hydrojet slit through die head length direction, pressurizing device is clamped between metal outer wall and erosion resistant coating, be formed as air storing cavity storage gas inside it, air storing cavity is connected to air inlet pipe, air inlet pipe is connected with high pressure air inlet fan is passed through gas to air storing cavity, pressurizing device has venthole, the venthole that setting matches with venthole on erosion resistant coating towards hydrojet slit side；5 width of hydrojet slit is 25-50 μm.Film thickness slimming and Kapton in homogeneous thickness can be made in the die head of the utility model.
Description
Technical field
The utility model relates to Kapton film formation devices, and in particular to a kind of Kapton film forming uses mould
Head.
Background technique
Kapton is the high score with the excellent properties such as high intensity, high tenacity, abrasion performance, high temperature resistant, corrosion-resistant
Sub- material is widely used in the fields such as Aeronautics and Astronautics, microelectronics, nanometer, liquid crystal, seperation film, laser.Also, under it
The high lightweight of trip product, high thin trend, Kapton tends to be thinned, especially as microelectronic industry etc.
Miniaturization, Kapton of the thickness less than 10 μm favored.
Kapton mostly uses slot coated method to form a film greatly at present, and the film forming die head of the slot coated method generally uses
Die head made of preceding knife plate and rear knife plate are fastened, forms slit, polyamic acid solution is narrow by this between preceding knife plate and rear knife plate
Seam is cast and goes out to film support band, and further hot imidization forms Kapton.
However, polyamic acid solution viscosity is larger, about 40,000-10 ten thousand centipoises, in order to enable liquid highly viscous in this way
Enough smooth curtain coatings, the width of slit at least need for 5mm or more, and otherwise slit easily blocks；On the other hand, preceding knife plate and rear knife plate
Manner, force slit width to cannot be below 5mm.Slit width is the polyimides obtained of getting to know of 5mm or more as a result,
The thickness of film is at least 20 μm or more, can not further be thinned.In addition, institute in existing slot coated method as described above
The die head used, the thickness of film obtained and the flow velocity of polyamic acid solution in entrance slit are closely bound up when being cast film,
Need polyamic acid solution flow velocity that the highly stable film forming thickness that can be only achieved is kept uniformly to require.
Summary of the invention
The use of the new type aims to overcome that above-mentioned shortcoming, solves that die slit is wide cannot to form thinner polyamides
It imines film and solves the problems, such as to cause thin film coated non-uniform because polyamic acid feed flow rate is unstable.
The technical solution of the utility model is a kind of Kapton film die, and the die head is consolidated by fixing bracket
Calmly and across the width direction in Kapton supporting part, the die head includes metal outer wall, the metal outer wall one
It is molded over internal formation liquid storage chamber, metal outer wall, which is connected to, is fixed and is suspended in Kapton support on fixed bracket
The top of band is lined with tetrabutyl benzotriazole salt erosion resistant coating on the inside of metal outer wall apart from Kapton supporting part 4-20mm；
Die head upper end offers feed inlet, lower end has the hydrojet slit through die head length direction, and die head upper end is located at
It is clamped with pressurizing device between metal outer wall and erosion resistant coating, is formed as air storing cavity storage gas, air storing cavity inside the pressurizing device
It is connected to air inlet pipe, air inlet pipe, which penetrates metal outer wall and is connected with high pressure air inlet fan, is passed through gas, pressurizing device direction to air storing cavity
Hydrojet slit side has several ventholes, and the venthole that setting matches with the venthole on the erosion resistant coating realizes storage
The connection of sap cavity and air storing cavity；The width of the hydrojet slit 5 is 25-50 μm.
Further in the width of the hydrojet slit can be 25-35 μm.
After the above technical solution is adopted, the beneficial effects of the utility model are: the die head by the utility model can be with shape
At thickness up to 10 μm of ultra-thin Kaptons below, and the thickness for being formed by Kapton is uniform, not by
The influence of polyamic acid solution flow velocity.
Detailed description of the invention
Fig. 1 is the schematic diagram of the Kapton film die of the utility model.
Fig. 2 is the sectional view of the Kapton film die of the utility model.
Fig. 3 is the bottom view of the pressurizing device of the Kapton film die of the utility model.
Fig. 4 is the Kapton film die of the utility model and the sectional view of Kapton supporting part.
Specific embodiment
It enumerates embodiment and the utility model is more specifically illustrated, but the utility model is not by these embodiments
Any restrictions, in the technical concept of the utility model, those skilled in the art can carry out various deformation.
As shown in Figure 1, the Kapton film die of the utility model is across in Kapton supporting part 1
Width direction on, installation further can be fixed in die head by fixed bracket 3, make die head and Kapton support
The distance of interband holding 4-20mm.Kapton film die and the connection type fixed between bracket 3 are in this example
In addition to this welding is also possible to rivet or be attached by fixing bolt etc., the Kapton film forming of the utility model
It is made of one piece with die body by metal outer wall 4.Die head upper end offers feed inlet 6, poly- for being passed through to die internal
Amide acid solution.It is equipped with hydrojet slit 5 in die head lower end, the length direction that hydrojet slit 5 traverses die head (traverses polyimides
The width direction of film support band 1).It is equipped with pressurizing device 7 on the top of die head, is connected with air inlet pipe 13 and air inlet pipe
12, air inlet pipe 13 and air inlet pipe 12, which can penetrate metal outer wall 4 and be connected with high pressure air inlet fan, is passed through gas to air storing cavity, thus right
Die internal provides pressure.Die head lower end is formed as rake 10 close to the part of hydrojet slit 5, is conducive to polyamic acid solution
It flows downward, will not deposit in the bottom of die head.
Fig. 2 is the sectional view of the Kapton film die of the utility model.As shown in Fig. 2, in metal outer wall 4
Inside is lined with tetrabutyl benzotriazole salt erosion resistant coating 9, which can be formed ands coating, being electroplated etc..Polyamic acid is molten
Liquid has extremely strong corrosivity, is used for a long time and causes to corrode to chamber wall, by the way that tetrabutyl benzotriazole salt erosion resistant coating 9 is arranged,
Corrosion of the polyamic acid solution to metal outer wall 4 can be effectively prevented, so that can arbitrarily select can for the material of metal outer wall 4
Be integrally formed and can anti-high pressure material, not because worry by polyamic acid solution corrosion due to be restricted.In addition, metal outer wall
4 inside form liquid storage chamber 8, for storing polyamic acid solution.Hydrojet slit 5 is offered in the lower end of die head, hydrojet slit 5 is wide
Degree is 25-50 μm, and polyamic acid solution is injected in polyimides via hydrojet slit 5 by the pressure provided by pressurizing device 7
On film support band, and then form a film.Pressurizing device 7 be installed in the upper end of die head be located at metal outer wall 4 and erosion resistant coating 9 it
Between, be formed as air storing cavity storage gas inside the pressurizing device 7, air storing cavity is connected to air inlet pipe, and air inlet pipe penetrates metal outer wall 4
It is connected with high pressure air inlet fan and is passed through gas to air storing cavity.Also, as shown in figure 3, pressurizing device 7 has towards 5 side of hydrojet slit
There are several ventholes 14, the venthole that setting matches with the venthole on the erosion resistant coating 9 realizes liquid storage chamber and air storing cavity
Connection provide high pressure gas to air storing cavity, then gas is via venthole and venthole thus when opening high pressure air inlet fan
Into in liquid storage chamber 8, pressure is applied to the polyamic acid solution being stored in liquid storage chamber 8, makes polyamic acid solution via hydrojet
Slit 5 is ejected into Kapton supporting part 1, is formed a film.Gas pressure can according to the viscosity of polyamic acid solution from
Row setting, so that it is excellent that polyamic acid solution, which smoothly sprays film forming,；In addition, in the present invention, being sprayed from hydrojet slit 5
Made of polyamic acid solution have certain pressure because of high-pressure injection, motion profile more levels off to linear type, rather than throws
Object line style, this, which is more advantageous on film support band, forms Kapton in homogeneous thickness.
As shown in figure 4, polyamic acid solution is stored in liquid storage chamber 8, then because the pressure of gas in pressurizing device 7 via
Hydrojet slit 5 is injected in Kapton supporting part 1, and Kapton support 1 is transported in the direction of the arrow around drive shaft 2
Turn, then carries out downstream hot imidization program and form a film.
Kapton film die described in the utility model, according to pressure injection polyamic acid solution in film branch
Support takes film forming, and film forming thickness is unrelated with the flow velocity that polyamic acid solution enters liquid storage chamber, Kapton thickness obtained
More uniformly.And because the width of hydrojet slit is very small, therefore thinner Kapton can be made.By making
With the Novel die of the utility model, the Kapton that film thickness is more thinned and thickness is more uniform can be made.
Embodiment 1
By the N of the 1,2,4,5- pyromellitic acid anhydride of mass fraction 10%, N- diethylformamide solution and quality point
The 4 of number 10%, the N of 4 '-diaminodiphenyl ethers, the mixing of N- diethylformamide solution are made polyamic acid solution, measure viscosity
80000 centipoises.
The polyamic acid solution is divided into two parts, a part is thin by the polyimides of the utility model as embodiment
Film film die film forming, wherein resistance to compression metal outer wall 4 is that 20CrMnMo is made, pressure apparatus 7 provides 100MPa pressure, spray
50 μm of the width of liquid slit 5, the height 4mm between the bottom and film support band 1 of resistance to compression metal outer wall 4.In the outer of liquid storage chamber 8
Week setting tetrabutyl benzotriazole salt erosion resistant coating 9,0.2 μm of thickness.
Embodiment 2
Other than the width of hydrojet slit 5 is 25 μm, other are same as Example 1.
Comparative example
Polyamic acid solution is made in method same as Example 1, is formed a film by existing scraper die head, slit width 5mm.
The thickness of the Kapton obtained is tested, as a result as shown in table 1 below.
Table 1
| The thickness of any one point | The arbitrarily average thickness of 100 points of measurement | Appearance | |
| Embodiment 1 | 9μm | 9.3μm | Appearance uniform |
| Embodiment 2 | 6μm | 6.2μm | Appearance uniform |
| Comparative example | 23μm | 23.8μm | It is uneven |
As shown in Table 1, the polyamic acid solution of identical viscosities passes through the Kapton film forming mould of the utility model
Head made from Kapton thickness uniformly and film it is thinner.
Claims (2)
1. a kind of Kapton film die, the die head is fixed and by fixing bracket across in Kapton branch
Support the width direction of band, which is characterized in that the die head includes metal outer wall, and the metal outer wall is integrally formed to be formed in inside
Liquid storage chamber, metal outer wall are connected to the top that Kapton supporting part is fixed and be suspended on fixed bracket, distance
Kapton supporting part 4-20mm, metal outer wall inside are lined with tetrabutyl benzotriazole salt erosion resistant coating；
Die head upper end offers feed inlet, lower end has the hydrojet slit through die head length direction, and die head upper end is located at metal
Pressurizing device is clamped between outer wall and erosion resistant coating, be formed as inside the pressurizing device air storing cavity storage gas, air storing cavity with into
Tracheae connection, air inlet pipe, which penetrates metal outer wall and is connected with high pressure air inlet fan, is passed through gas to air storing cavity, and pressurizing device is towards hydrojet
Slit side has several ventholes, and the venthole that setting matches with the venthole on the erosion resistant coating realizes liquid storage chamber
With the connection of air storing cavity；
The width of the hydrojet slit 5 is 25-50 μm.
2. Kapton film die according to claim 1, which is characterized in that the width of the hydrojet slit
It is 25-35 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821433872.7U CN208714442U (en) | 2018-09-03 | 2018-09-03 | A kind of Kapton film die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821433872.7U CN208714442U (en) | 2018-09-03 | 2018-09-03 | A kind of Kapton film die |
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| Publication Number | Publication Date |
|---|---|
| CN208714442U true CN208714442U (en) | 2019-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821433872.7U Active CN208714442U (en) | 2018-09-03 | 2018-09-03 | A kind of Kapton film die |
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| CN (1) | CN208714442U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110540752A (en) * | 2019-09-25 | 2019-12-06 | 桂林电子科技大学 | Filler orientation-reinforced high-thermal-conductivity polyimide composite film and preparation method thereof |
-
2018
- 2018-09-03 CN CN201821433872.7U patent/CN208714442U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110540752A (en) * | 2019-09-25 | 2019-12-06 | 桂林电子科技大学 | Filler orientation-reinforced high-thermal-conductivity polyimide composite film and preparation method thereof |
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