Cooling device for polyamide acid resin slurry

Abstract

The utility model belongs to the technical field of polyamide acid resin slurry, and particularly relates to a cooling device for polyamide acid resin slurry, which comprises a polymerization kettle, a pipeline I, a storage tank, a pipeline II, a static mixer I, a static mixer II and a gear pump, polyamide acid resin slurry passes through gaps formed between the open pores and the four opening and closing sliding plates, and then is pumped into the die head for curtain coating through the discharging pipe; meanwhile, a driving gear ring is relatively rotated, so that a rotating gear is driven to move through the driving gear ring, an opening and closing sliding plate is driven to move through the rotating gear, and meanwhile, a rectangular matching sliding block relatively slides in a rectangular matching sliding groove, so that the area of the opening and closing sliding plate for shielding the hole is changed; the amount of the polyamide acid resin slurry flowing between the opening and closing sliding plate and the open pore is adjusted, so that the flow velocity of the polyamide acid resin slurry is adjusted.

Description

Technical Field

[0001] This utility model belongs to the field of polyamic acid resin slurry technology, and particularly relates to a cooling device for polyamic acid resin slurry. Background Technology

[0002] Polyimide, due to its excellent mechanical, insulating, and thermal stability, is widely used in aerospace, microelectronics, and electrical insulation fields. High-end polyimide films are mostly produced using chemical imidization processes. Compared to thermal imidization, chemical imidization utilizes chemical imidizing agents (catalysts and dehydrating agents) to achieve imidization, allowing for high-speed production and producing films with superior performance. In the chemical imidization process, after the polyamic acid (PAA) resin reaches the viscosity target and is degassed in the polymerization stage, it needs to be cooled to below 0°C before being mixed with the chemical imidizing agent and cast. Conventional static cooling methods cannot achieve uniform and rapid cooling of high-viscosity polyamic acid resin slurry (200,000-300,000 CP) from the surface inwards. If stirring is performed during cooling within the reactor, air bubbles will be reintroduced. Therefore, cooling the polyamic acid resin slurry is one of the core components of the entire polymerization unit. Utility Model Content

[0003] The purpose of this invention is to provide a cooling device for polyamic acid resin slurry to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, the specific technical solution of the cooling device for polyamic acid resin slurry of this utility model is as follows:

[0005] A cooling device for polyamic acid resin slurry includes a polymerization reactor, a first pipeline, a storage tank, a second pipeline, a first static mixer, a second static mixer, and a gear pump. The polymerization reactor is connected to one end of the first pipeline, and the other end of the first pipeline is installed on the storage tank. The storage tank is installed at one end of the second pipeline, and the other end of the second pipeline is installed on a die head connection assembly. The second static mixer is installed on the first pipeline, and a gear pump is installed between the first pipeline and the second static mixer. The first static mixer is installed on the second pipeline, and another gear pump is installed between the second pipeline and the first static mixer.

[0006] Furthermore, both static mixer one and static mixer two are of type SX or SK, and both the polymerization reactor and the storage tank are equipped with circulation pumps.

[0007] Furthermore, it also includes a die head connection assembly, which is installed between the first pipe and the second static mixer, and another die head connection assembly is installed between the second pipe and the first static mixer.

[0008] Furthermore, the die head connection assembly includes a mounting end plate, a discharge pipe, a connecting end plate, a drive gear ring, an opening and closing slide plate, a rectangular mating groove, a rectangular mating slider, a mounting post, a rotating gear, and an opening. The discharge pipe is fixedly mounted on the mounting end plate, and the mounting end plate is fixedly mounted on the connecting end plate. The drive gear ring is rotatably mounted on the connecting end plate. An opening is provided on the connecting end plate. A mounting post is fixedly mounted inside the connecting end plate, and a rotating gear is rotatably mounted on the mounting post. A rectangular mating slider is fixedly mounted on the connecting end plate and slides in a rectangular mating groove. The rectangular mating groove is located on the opening and closing slide plate. Multiple opening and closing slide plates are provided. One end of the rotating gear meshes with the opening and closing slide plate for transmission, and the other end of the rotating gear meshes with the drive gear ring for transmission.

[0009] Furthermore, multiple opening and closing sliding plates are arranged in a circumferential array along the central axis of the connecting end plate.

[0010] Furthermore, the two adjacent opening and closing slide plates slide into contact with each other.

[0011] Furthermore, both the pipe and the first pipe are equipped with a cold insulation jacket. The thickness of the jacket is 1 / 2 to 1 times the radius of the pipe. A cooling medium is circulated inside the jacket, and the temperature is set to -15 to -5℃. The preferred cooling medium is an ethylene glycol solution.

[0012] Furthermore, the storage tank is equipped with a cold insulation jacket, with a temperature of -15 to -5°C.

[0013] Furthermore, the length of the first static mixer accounts for 1 / 3 to 1 / 2 of the total length of the first pipe, and the length of the second static mixer accounts for 1 / 3 to 1 / 2 of the total length of the first pipe.

[0014] Furthermore, the cooling jackets of the first static mixer and the second static mixer 6 are independently set, and the thickness of the jacket is 1 to 1.5 times the radius of the pipe at that point. A temperature measuring device is provided at the outlet of the second static mixer. When the temperature of the polyamic acid resin at that point exceeds 0°C, the temperature of the cooling medium in the jacket of the second static mixer is reduced so that the polyamic acid resin can be cooled down rapidly.

[0015] The advantages of this utility model are:

[0016] 1. Start the circulation pump and gear pump to allow the polyamic acid resin slurry to enter the storage tank through the polymerization reactor and pipe one, and then be injected into the die head through pipe two. The circulation pump and gear pump provide power for the flow of the polyamic acid resin slurry, and the gear pump can adjust the flow rate of the polyamic acid resin slurry.

[0017] 2. After the polyamic acid resin slurry is adjusted and degassed in the polymerization reactor, the final resin viscosity is 300,000 cp. It is then pumped into the storage tank through a pipeline. The cooling jacket of the pipeline is circulated with a -5℃ ethylene glycol solution. The total length of the pipeline is 20m, the radius is 10cm, and the thickness of the insulation jacket is 8cm. Static mixer one is of type SK, with a length of 7m and a thickness of 10cm in the insulation jacket. The insulation jacket of static mixer one is also circulated with a -10℃ ethylene glycol solution.

[0018] 3. The polyamic acid resin slurry is then injected into the die head for casting via a pipeline from the storage tank through the die head connection assembly. The storage tank's jacket cooling temperature is -5℃. The pipeline is 15m long with a radius of 15cm, and the jacket thickness is 15cm. The jacket is supplied with a -5℃ ethylene glycol solution. The second static mixer within the pipeline is an SK type, 7.5m long, with a jacket thickness of 18cm, and is supplied with a -10℃ ethylene glycol solution. The polyamic acid resin temperature measured at the outlet of the second static mixer is 2℃, which does not meet the process requirements. The coolant temperature in the jacket of the second static mixer is lowered to -13℃, and the outlet resin temperature is measured at -0.5℃, meeting the standard.

[0019] 4. The polyamic acid resin slurry flows through the gap formed between the opening and the four opening and closing slide plates, and then into the die head through the discharge pipe for casting. At the same time, the relative rotation of the drive gear ring drives the rotating gear, which in turn drives the opening and closing slide plates. This causes the rectangular mating slider to slide relative to each other in the rectangular mating groove, changing the area of ​​the opening and closing slide plates that block the opening. This adjusts the amount of polyamic acid resin slurry flowing between the opening and closing slide plates and the opening, thereby regulating the flow rate of the polyamic acid resin slurry. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0021] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0022] Figure 3 This is a schematic diagram of the mold head connection assembly structure of this utility model. Figure 1 ;

[0023] Figure 4 This is a schematic diagram of the mold head connection assembly structure of this utility model. Figure 2 ;

[0024] Figure 5 for Figure 3 A schematic diagram showing the location of the cutting line;

[0025] Figure 6 for Figure 5 A sectional view along section AA;

[0026] Figure 7 for Figure 5 A sectional view along section BB;

[0027] Explanation of markings in the diagram: 1. Polymerization reactor; 2. Pipe 1; 3. Storage tank; 4. Pipe 2; 5. Static mixer 1; 6. Static mixer 2; 7. Die head connection assembly; 7-1. Mounting end plate; 7-2. Discharge pipe; 7-3. Connecting end plate; 7-4. Drive gear ring; 7-5. Opening and closing slide plate; 7-6. Rectangular mating groove; 7-7. Rectangular mating slider; 7-8. Mounting column; 7-9. Rotating gear; 7-10. Opening. Detailed Implementation

[0028] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] Example 1

[0031] like Figure 1-7 As shown, Figure 1-7As shown, a cooling device for polyamic acid resin slurry includes a polymerization reactor 1, a first pipe 2, a storage tank 3, a second pipe 4, a first static mixer 5, a second static mixer 6, and a gear pump 8. The polymerization reactor 1 is connected to one end of the first pipe 2, and the other end of the first pipe 2 is installed on the storage tank 3. The storage tank 3 is installed at one end of the second pipe 4, and the other end of the second pipe 4 is installed on a die head connection assembly 7. The second static mixer 6 is installed on the first pipe 2, and the gear pump 8 is installed between the first pipe 2 and the second static mixer 6. The first static mixer 5 is installed on the second pipe 4, and another gear pump 8 is installed between the second pipe 4 and the first static mixer 5. With this configuration, starting the circulation pump and the gear pump 8 allows the polyamic acid resin slurry to circulate through... The polyamic acid resin slurry enters the storage tank 3 through the polymerization reactor 1 and pipe 2, and is injected into the die head through pipe 4. The circulation pump and gear pump 8 provide power for the flow of the polyamic acid resin slurry. The gear pump 8 can adjust the flow rate of the polyamic acid resin slurry. At the same time, after the polyamic acid resin slurry is adjusted and degassed in the polymerization reactor 1, the final viscosity of the resin is 300,000 cp. It is then pumped into the storage tank 3 through pipe 2. The cooling jacket of pipe 2 is circulated with a -5℃ ethylene glycol solution. The total length of pipe 2 is 20m, the radius is 10cm, and the thickness of the insulation jacket of pipe 2 is 8cm. The static mixer 5 is of type SK, with a length of 7m. The thickness of the insulation jacket of static mixer 5 is 10cm, and the insulation jacket of the static mixer section is circulated with a -10℃ ethylene glycol solution.

[0032] The polyamic acid resin slurry is then injected into the die head for casting via storage tank 3, pipe 4, and die head connection assembly 7. The jacket cooling temperature of storage tank 3 is -5℃. Pipe 4 is 15m long, has a pipe radius of 15cm, and the jacket thickness is 15cm. The jacket is supplied with a -5℃ ethylene glycol solution. Static mixer 6 inside pipe 4 is of type SK, 7.5m long, with a jacket thickness of 18cm, and is supplied with a -10℃ ethylene glycol solution. The polyamic acid resin temperature measured at the outlet of static mixer 6 is 2℃, which does not meet the process requirements. The coolant temperature in the jacket of static mixer 6 is reduced to -13℃, and the outlet resin temperature is measured to be -0.5℃, which meets the standard.

[0033] Among them, static mixer 5 and static mixer 6 are both of type SX or SK, and circulating pumps are installed on both polymerization reactor 1 and storage tank 3.

[0034] It also includes a die head connection assembly 7, which is installed between the first pipe 2 and the second static mixer 6, and another die head connection assembly 7 is installed between the second pipe 4 and the first static mixer 5.

[0035] Example 2

[0036] like Figure 1-7As shown, the die head connecting assembly 7 includes a mounting end plate 7-1, a discharge pipe 7-2, a connecting end plate 7-3, a drive gear ring 7-4, an opening / closing slide plate 7-5, a rectangular mating groove 7-6, a rectangular mating slider 7-7, a mounting post 7-8, a rotating gear 7-9, and an opening 7-10. The discharge pipe 7-2 is fixedly mounted on the mounting end plate 7-1. The mounting end plate 7-1 is fixedly mounted on the connecting end plate 7-3. The drive gear ring 7-4 is rotatably mounted on the connecting end plate 7-3. The opening 7-10 is formed in the connecting end plate 7-3. The mounting post 7-8 is fixedly mounted inside the connecting end plate 7-3. The rotating gear 7-9 is rotatably mounted on the mounting post 7-8. The rectangular mating slider 7-7 is fixedly mounted on the connecting end plate 7-3. The rectangular mating slider 7-7 is slidably fitted into the rectangular mating groove 7-6, which is located on the opening / closing slide plate 7-5. Multiple opening and closing slide plates 7-5 are provided. One end of the rotating gear 7-9 meshes with the opening and closing slide plate 7-5 for transmission, and the other end of the rotating gear 7-9 meshes with the drive gear ring 7-4 for transmission. With this configuration, the polyamic acid resin slurry passes through the gap formed between the opening 7-10 and the four opening and closing slide plates 7-5, and is then injected into the die head for casting through the discharge pipe 7-2. At the same time, the relative rotation of the drive gear ring 7-4 drives the rotating gear 7-9 to move, which in turn drives the opening and closing slide plates 7-5 to move. This causes the rectangular mating slider 7-7 to slide relative to the rectangular mating groove 7-6, changing the area of ​​the opening and closing slide plate 7-5 that blocks the opening 7-10. This adjusts the amount of polyamic acid resin slurry flowing between the opening and closing slide plate 7-5 and the opening 7-10, thereby regulating the flow rate of the polyamic acid resin slurry.

[0037] The multiple opening and closing sliding plates 7-5 are arranged in a circumferential array along the central axis of the connecting end plate 7-3.

[0038] In this case, two adjacent opening and closing sliding plates 7-5 slide in contact with each other.

[0039] Example 3

[0040] like Figure 1-7 As shown, both pipe 2 and pipe 4 are equipped with cold insulation jackets. The thickness of the jacket is 1 / 2 to 1 times the pipe radius. Cooling medium flows through the jacket, and the temperature is set to -15 to -5℃. Ethylene glycol solution is preferred as the cooling medium.

[0041] The storage tank 3 is equipped with a cold insulation jacket, with a temperature of -15 to -5℃.

[0042] The length of static mixer 5 is 1 / 3 to 1 / 2 of the total length of pipe 4, and the length of static mixer 6 is 1 / 3 to 1 / 2 of the total length of pipe 2.

[0043] The cooling jackets of static mixer 5 and static mixer 6 are independently set, and the thickness of the jacket is 1 to 1.5 times the radius of the pipe at that point. A temperature measuring device is installed at the outlet of static mixer 6. When the temperature of polyamic acid resin at that point exceeds 0°C, the temperature of the cooling medium in the jacket of static mixer 6 is reduced so that the polyamic acid resin can be cooled down quickly.

[0044] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A cooling device for polyamic acid resin slurry, characterized in that, The assembly includes a polymerization reactor (1), a first pipeline (2), a storage tank (3), a second pipeline (4), a first static mixer (5), a second static mixer (6), and a gear pump (8). The polymerization reactor (1) is connected to one end of the first pipeline (2), the other end of the first pipeline (2) is installed on the storage tank (3), the storage tank (3) is installed on one end of the second pipeline (4), the other end of the second pipeline (4) is installed on the die head connection assembly (7), the second static mixer (6) is installed on the first pipeline (2), the gear pump (8) is installed between the first pipeline (2) and the second static mixer (6), the first static mixer (5) is installed on the second pipeline (4), and another gear pump (8) is installed between the second pipeline (4) and the first static mixer (5).

2. The cooling device for polyamic acid resin slurry according to claim 1, characterized in that, Both static mixer one (5) and static mixer two (6) are of type SX or SK, and both polymerization kettle (1) and storage tank (3) are equipped with circulation pumps.

3. The cooling device for polyamic acid resin slurry according to claim 1, characterized in that, It also includes a die head connection assembly (7), which is installed between the first pipe (2) and the second static mixer (6), and another die head connection assembly (7) is installed between the second pipe (4) and the first static mixer (5).

4. The cooling device for polyamic acid resin slurry according to claim 3, characterized in that, The die head connecting assembly (7) includes a mounting end plate (7-1), a discharge pipe (7-2), a connecting end plate (7-3), a drive gear ring (7-4), an opening and closing slide plate (7-5), a rectangular mating slide groove (7-6), a rectangular mating slider (7-7), a mounting post (7-8), a rotating gear (7-9), and an opening (7-10). The discharge pipe (7-2) is fixedly mounted on the mounting end plate (7-1). The mounting end plate (7-1) is fixedly mounted on the connecting end plate (7-3). The drive gear ring (7-4) is rotatably mounted on the connecting end plate (7-3). The opening is formed on the connecting end plate (7-3). (7-10) A mounting post (7-8) is fixedly installed inside the connecting end plate (7-3). A rotating gear (7-9) is rotatably installed on the mounting post (7-8). A rectangular mating slider (7-7) is fixedly installed on the connecting end plate (7-3). The rectangular mating slider (7-7) is slidably installed in the rectangular mating groove (7-6). The rectangular mating groove (7-6) is opened on the opening and closing slide plate (7-5). There are multiple opening and closing slide plates (7-5). One end of the rotating gear (7-9) meshes with the opening and closing slide plate (7-5) for transmission. The other end of the rotating gear (7-9) meshes with the drive gear ring (7-4) for transmission.

5. The cooling device for polyamic acid resin slurry according to claim 4, characterized in that, Multiple opening and closing sliding plates (7-5) are arranged in a circumferential array along the central axis of the connecting end plate (7-3).

6. The cooling device for polyamic acid resin slurry according to claim 4, characterized in that, The two adjacent opening and closing slide plates (7-5) slide into contact with each other.

7. The cooling device for polyamic acid resin slurry according to claim 1, characterized in that, Both pipe one (2) and pipe two (4) are equipped with cold insulation jackets. The thickness of the jacket is 1 / 2 to 1 times the radius of the pipe. Cooling medium is passed through the jacket and the temperature is set to -15 to -5℃. The cooling medium is ethylene glycol solution.

8. The cooling device for polyamic acid resin slurry according to claim 1, characterized in that, The storage tank (3) is equipped with a cold insulation jacket with a temperature of -15~-5℃.

9. A cooling device for polyamic acid resin slurry according to claim 1, characterized in that, The length of the first static mixer (5) is 1 / 3 to 1 / 2 of the total length of the first pipe (2), and the length of the second static mixer (6) is 1 / 3 to 1 / 2 of the total length of the first pipe (2).

10. A cooling device for polyamic acid resin slurry according to claim 1, characterized in that, The cooling jackets of the static mixer one (5) and the static mixer two (6) are set independently, and the thickness of the jacket is 1 to 1.5 times the radius of the pipe at that point. A temperature measuring device is provided at the outlet of the static mixer two (6). When the temperature of the polyamic acid resin at that point exceeds 0°C, the temperature of the cooling medium in the jacket of the static mixer two (6) is reduced so that the polyamic acid resin can be cooled down quickly.

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