High modulus polyimide film

Abstract

The high-modulus polyimide film comprises a film body and a base, vertical plates are arranged on the two sides of the upper end of the base, cooling rollers are rotationally installed on the inner walls of the vertical plates, the film body is in transmission connection with the cooling rollers, and heating mechanisms used for heating the film body are arranged on the opposite sides of the vertical plates on the two sides. A heating assembly is arranged on the right side of the film main body, and a two-way stretching mechanism used for stretching the film main body is arranged on the right side of the heating assembly. The distance between the upper longitudinal stretching roller and the lower longitudinal stretching roller and the distance between the two transverse stretching rollers can be easily adjusted through mutual matching of all the parts, and the orientation of the high-modulus polyimide film in two directions can be easily adjusted, so that the performance of the high-modulus polyimide film is conveniently adjusted; the utility model has the advantages of higher use value and higher economic benefit.

Description

Technical Field

[0001] The utility model relates to the technical field of film production, in particular to a high modulus polyimide film. Background Art

[0002] Polyimide film is often produced by the cast film method. The raw material is first plasticized and melted by an extruder, then extruded through a forming die, and cast in sheet form onto the roller surface of a steadily rotating cooling roller. The film is cooled and shaped on the cooling roller, and then the product is rolled up after traction and trimming. With the rapid development of technology in aviation, aerospace, electronic information and many other fields, the requirements for polyimide materials are becoming higher and higher. These high-precision technical equipment require polyimide films to have better high temperature resistance and physical properties, and still have good dimensional stability at high temperatures. In flexible printed circuit boards (FPCs), polyimide is the most widely used insulating layer film substrate. With the development of FPC technology, there are higher requirements for the mechanical strength, rigidity and dimensional stability of the film substrate. Therefore, it is necessary to produce and process high-modulus polyimide films with different properties.

[0003] When processing high modulus polyimide film, the existing polyimide film processing device needs to stretch it in order to control the thickness of the high modulus polyimide film, and different orientations in two directions will produce high modulus polyimide films with different properties. The existing high modulus polyimide film processing device mostly stretches the high modulus polyimide film by biaxial stretching, and the positions of the longitudinal stretching roller and the transverse stretching roller in the existing processing device are fixed. When high modulus polyimide films with different properties need to be processed, the corresponding film processing machine needs to be used, which is not conducive to reducing production costs. Utility Model Content

[0004] The purpose of the utility model is to provide a high modulus polyimide film to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A high modulus polyimide film comprises a film body and a base, wherein vertical plates are arranged on both sides of the upper end of the base, cooling rollers are rotatably installed on the inner walls of the vertical plates, and the film body is transmission-connected to the cooling rollers. A heating mechanism for heating the film body is arranged on the opposite side of the vertical plates on both sides, and a bidirectional stretching mechanism for stretching the film body is arranged on the right side of the heating mechanism.

[0007] In a preferred embodiment of the present utility model, the vertical plates at both sides are rotatably mounted with a pressing roller and a winding roller on one side opposite to the other, and a cavity is opened on the inner wall of the vertical plates.

[0008] In a preferred embodiment of the utility model, the heating mechanism includes a heating roller and a first motor, the heating roller is rotatably installed on the opposite side of two vertical plates, there are multiple heating rollers, the output shaft of the first motor is fixedly connected to a heating roller, and first belts are arranged on both sides of the heating roller, and the first belt transmission connects two adjacent heating rollers.

[0009] In a preferred embodiment of the present invention, the bidirectional stretching mechanism includes a longitudinal stretching roller group and a transverse stretching roller group, the longitudinal stretching roller group is rotatably installed on the opposite side of the two vertical plates, and the longitudinal stretching roller group is connected to a longitudinal adjustment component, and the transverse stretching roller group is rotatably installed on the opposite side of the two vertical plates, and the transverse stretching roller group is connected to a transverse adjustment component.

[0010] In a preferred embodiment of the present invention, the longitudinal adjustment assembly includes a first mounting plate, which is fixedly mounted on the upper and lower sides of the inner wall of the vertical plate, and one side of the two first mounting plates are rotatably mounted with a first threaded rod on the opposite side, and there are four first threaded rods.

[0011] In a preferred embodiment of the present invention, the four first threaded rods are connected via a belt drive, a second motor is fixedly mounted on the inner wall of the lower first mounting plate, and an output shaft of the second motor is fixedly connected to a first threaded rod.

[0012] In a preferred embodiment of the utility model, a first guide rod is fixedly mounted on one side opposite to the two first mounting plates on the other side, a connecting block is slidably mounted on the first threaded rod and the outer wall of the first guide rod, and the longitudinal stretching roller group is rotatably connected to the connecting block.

[0013] In a preferred embodiment of the present utility model, the lateral adjustment assembly includes a second threaded rod, the second threaded rod is rotatably mounted on an inner wall of one vertical plate, and a second guide rod is fixedly mounted on an inner wall of another vertical plate.

[0014] In a preferred embodiment of the present invention, a sliding block is slidably connected between the second threaded rod and the outer wall of the second guide rod.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention.

[0016] Beneficial effects: The utility model is provided with a bidirectional stretching mechanism, which can easily adjust the distance between the upper and lower longitudinal stretching rollers and the distance between the two transverse stretching rollers through the cooperation of various parts. The utility model can easily adjust the orientation of the high modulus polyimide film in two directions to facilitate the processing of the performance of the high modulus polyimide film. The utility model has higher use value and higher economic benefits, which is conducive to reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 Schematic diagram of the structure of high modulus polyimide film.

[0019] Figure 2 Schematic diagram of the side view of the high modulus polyimide film.

[0020] Figure 3 Schematic diagram of the installation structure of the longitudinal stretching roller group in the high modulus polyimide film.

[0021] Figure 4 Schematic diagram of the structure of the heating mechanism in the high modulus polyimide film.

[0022] Figure 5 It is a schematic diagram of the structure of the inner wall of the first mounting plate in the high modulus polyimide film.

[0023] Figure 6 Schematic diagram of the structure of the lateral adjustment component in the high modulus polyimide film.

[0024] Figure 7 Schematic diagram of the structure of the main body of the high modulus polyimide film during processing.

[0025] In the figure: film body 100; base 200; vertical plate 210; cooling roller 220; winding roller 230; pressure roller 240; heating roller 250; first motor 260; first belt 270; longitudinal stretching roller group 310; first mounting plate 311; transverse stretching roller group 320; first threaded rod 313; first guide rod 312; second motor 315; connecting block 314; second threaded rod 321; second guide rod 322; slider 323; third motor 324. DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0027] Example 1: Figure 1-7 , comprising a film body 100 and a base 200, wherein vertical plates 210 are arranged on both sides of the upper end of the base 200, and cooling rollers 220 are rotatably installed on the inner wall of the vertical plates 210, and the film body 100 is connected to the cooling rollers 220 by transmission, and a heating mechanism for heating the film body 100 is arranged on the opposite side of the vertical plates 210 on both sides, and a bidirectional stretching mechanism for stretching the film body 100 is arranged on the right side of the heating mechanism; a pressing roller 240 and a winding roller 230 are rotatably installed on the opposite side of the vertical plates 210 on both sides; a cavity is opened on the inner wall of the vertical plates 210;

[0028] The specific practical scenario of this embodiment is as follows: two pressing rollers 240 are rotatably installed between the cooling roller 220 and the heating mechanism, and a high modulus polyimide film forming mechanism is arranged on the left side of the cooling roller 220. This part of the structure adopts the existing technology, and the film body 100 can be cooled and cooled by the cooling roller 220, and the film body 100 can be guided, transmitted and pressed by the two pressing rollers 240 on the right side; a pressing roller 240 is arranged between the heating mechanism and the biaxial stretching mechanism; the film body 100 passes through the cooling roller 220 from below, and is cooled by the cooling roller 220, and then the cooling roller 220, and then the film body 100 passes through the heating mechanism, and is heated by the heating mechanism, and the film body 100 is stretched by the biaxial stretching mechanism, so that the film body 100 becomes thinner; the winding roller 230 is fixedly connected to a motor, and the winding roller 230 can be driven by the motor to rotate to wind up the processed film body 100;

[0029] Example 2: Figure 1-7, comprising a film body 100 and a base 200, wherein vertical plates 210 are arranged on both sides of the upper end of the base 200, and cooling rollers 220 are rotatably installed on the inner wall of the vertical plates 210, and the film body 100 is drivingly connected to the cooling rollers 220, and a heating mechanism for heating the film body 100 is arranged on the opposite side of the vertical plates 210 on both sides, and a bidirectional stretching mechanism for stretching the film body 100 is arranged on the right side of the heating mechanism; the heating mechanism comprises a heating roller 250 and a first motor 260, and the heating roller 250 is rotatably installed on the opposite side of the two vertical plates 210, and there are multiple heating rollers 250, and the output shaft of the first motor 260 is fixedly connected to a heating roller 250, and first belts 270 are arranged on both sides of the heating roller 250, and the first belt 270 is drivingly connected to two adjacent heating rollers 250;

[0030] The specific practical scenario of this embodiment is as follows: the rotating shaft of each heating roller 250 is connected to the adjacent heating roller 250 through the first belt 270, one end of the first belt 270 is connected to a heating roller 250, and the other end of the first belt 270 is connected to the adjacent heating roller 250. When the first motor 260 is working, it can drive the heating roller 250 fixedly connected to its output shaft to rotate. The heating roller 250 adopts the existing technology. The heating roller 250 can heat the film body 100, so that the biaxial stretching mechanism can stretch the film body 100.

[0031] Example 3: Figure 1-7, including a film body 100 and a base 200, wherein vertical plates 210 are arranged on both sides of the upper end of the base 200, and cooling rollers 220 are rotatably installed on the inner wall of the vertical plates 210, and the film body 100 is transmission-connected to the cooling rollers 220, and heating mechanisms for heating the film body 100 are arranged on opposite sides of the vertical plates 210 on both sides, and a bidirectional stretching mechanism for stretching the film body 100 is arranged on the right side of the heating mechanism; the bidirectional stretching mechanism includes a longitudinal stretching roller group 310 and a transverse stretching roller group 320, the longitudinal stretching roller group 310 is rotatably installed on opposite sides of the two vertical plates 210, and the longitudinal stretching roller group 310 is connected to a longitudinal adjustment component, the transverse stretching roller group 320 is rotatably installed on opposite sides of the two vertical plates 210, and the transverse stretching roller group 320 is connected to a transverse adjustment component; the longitudinal adjustment component includes a first mounting plate 311, which is fixedly installed on the upper and lower sides of the inner wall of the vertical plate 210, a The two first mounting plates 311 on the side are rotatably mounted with a first threaded rod 313 on one side opposite to the other, and there are four first threaded rods 313; the four first threaded rods 313 are connected by belt transmission, and a second motor 315 is fixedly mounted on the inner wall of the lower first mounting plate 311, and the output shaft of the second motor 315 is fixedly connected to a first threaded rod 313; the two first mounting plates 311 on the other side are fixedly mounted with a first guide rod 312 on one side opposite to the other, and a connecting block 314 is slidably mounted on the outer walls of the first threaded rod 313 and the first guide rod 312, and the longitudinal stretching roller group 310 is rotatably connected to the connecting block 314; the lateral adjustment component includes a second threaded rod 321, the second threaded rod 321 is rotatably mounted on the inner wall of one vertical plate 210, and a second guide rod 322 is fixedly mounted on the inner wall of the other vertical plate 210; the second threaded rod 321 and the outer walls of the second guide rod 322 are slidably connected with a slider 323;

[0032] The specific practical scenario of this embodiment is as follows: a pressure roller 240 is arranged between the longitudinal stretching roller group 310 and the transverse stretching roller group 320, a pressure roller 240 is arranged between the transverse stretching roller group 320 and the winding roller 230, each transverse stretching roller inside the transverse stretching roller group 320 is rotatably connected with a slider 323 on both sides, a fourth motor is fixedly installed on the inner wall of the slider 323 on one side, the fourth motor is fixedly connected to the roller shaft of the transverse stretching roller, and the rotation speed of the transverse stretching roller group 320 can be controlled by each fourth motor to perform transverse stretching on the film body 100, a connecting block 314 is rotatably installed on both sides of each longitudinal stretching roller on the inner wall of the longitudinal stretching roller group 310, a fifth motor is arranged on the inner wall of the connecting block 314, and the output shaft of the fifth motor is fixedly connected to the roller shaft of the longitudinal stretching roller, and the rotation speed of each longitudinal stretching roller on the inner wall of the longitudinal stretching roller group 310 can be controlled by the fifth motor, so as to The film body 100 is longitudinally stretched; there are four first threaded rods 313, and the thread directions of two adjacent first threaded rods 313 are opposite. When one first threaded rod 313 rotates, the other three first threaded rods 313 can rotate simultaneously through the transmission connection of the belt, so that the moving directions of two adjacent connecting blocks 314 are opposite. The first guide rod 312 can guide the moving direction of the connecting block 314, and the connecting blocks 314 corresponding to the two sides can make the longitudinal stretching roller group 310 move up and down; when the third motor 324 is provided on the right side of the second threaded rod 321, the output shaft of the third motor 324 is fixedly connected to the second threaded rod 321, and the second threaded rod 321 is a bidirectional threaded rod. When the second threaded rod 321 rotates, it can drive the two sliders 323 on its outer wall to approach or move away from each other, so as to adjust the distance between the two transverse stretching rollers;

[0033] The above structures and principles are all common standard parts or parts known to those skilled in the art, and their structures and principles can be known by those skilled in the art through technical manuals or conventional experimental methods;

[0034] The working principle of the utility model is as follows: the equipment is connected to electricity, the formed film body 100 passes through the cooling roller 220 from the upper left side downward, then passes through the first pressing roller 240 from the upper side, goes around to the lower side of the second pressing roller 240, and then passes through multiple heating rollers 250, pressing rollers 240, longitudinal stretching roller group 310 and pressing roller 240 alternately from top to bottom, the film body 100 is then connected to the two transverse stretching rollers on the lower side from the upper side, and is wound around the outer wall of the winding roller 230, the film body 100 is heated by the heating roller 250, the winding roller 230 is controlled by the motor to rotate to wind the film body 100, the longitudinal stretching roller group 310 is adjusted by the fifth motor inside the connecting block 314, and the transverse stretching roller group 320 is adjusted by the fourth motor inside the slider 323. The body 100 is stretched; when it is necessary to adjust the orientation of the bidirectional stretching mechanism in two directions, starting the second motor 315 can drive the first threaded rod 313 fixedly connected thereto to rotate. When the first threaded rod 313 rotates, the other first threaded rods 313 can be pulled to rotate simultaneously through the belt, so that the connecting block 314 of the outer wall of the first threaded rod 313 moves up and down, and the connecting blocks 314 of the outer walls of two adjacent first threaded rods 313 move in different directions, so that the two adjacent longitudinal stretching rollers can approach or move away from each other to adjust the distance between the upper and lower longitudinal stretching rollers. Starting the third motor 324 to drive the second threaded rod 321 to rotate can make the two sliders 323 on the outer wall of the second threaded rod 321 approach or move away from each other to adjust the distance between the two transverse stretching rollers.

[0035] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A high modulus polyimide film, comprising a film body (100) and a base (200), wherein vertical plates (210) are arranged on both sides of the upper end of the base (200), characterized in that: A cooling roller (220) is rotatably mounted on the inner wall of the vertical plate (210), and the film body (100) is transmission-connected to the cooling roller (220). A heating mechanism for heating the film body (100) is disposed on opposite sides of the vertical plates (210), and a bidirectional stretching mechanism for stretching the film body (100) is disposed on the right side of the heating mechanism.

2. The high modulus polyimide film according to claim 1, characterized in that: A pressing roller (240) and a winding roller (230) are rotatably mounted on opposite sides of the vertical plates (210) at both sides, and a cavity is formed on the inner wall of the vertical plates (210).

3. The high modulus polyimide film according to claim 1, characterized in that: The heating mechanism comprises a heating roller (250) and a first motor (260); the heating roller (250) is rotatably mounted on opposite sides of two vertical plates (210); there are multiple heating rollers (250); an output shaft of the first motor (260) is fixedly connected to a heating roller (250); first belts (270) are arranged on both sides of the heating roller (250); the first belts (270) are transmission-connected to two adjacent heating rollers (250).

4. The high modulus polyimide film according to claim 1, characterized in that: The biaxial stretching mechanism comprises a longitudinal stretching roller group (310) and a transverse stretching roller group (320), wherein the longitudinal stretching roller group (310) is rotatably mounted on one side opposite to the two vertical plates (210), and the longitudinal stretching roller group (310) is connected to a longitudinal adjustment component, and the transverse stretching roller group (320) is rotatably mounted on one side opposite to the two vertical plates (210), and the transverse stretching roller group (320) is connected to a transverse adjustment component.

5. The high modulus polyimide film according to claim 4, characterized in that: The longitudinal adjustment assembly comprises a first mounting plate (311) which is fixedly mounted on the upper and lower sides of the inner wall of the vertical plate (210); a first threaded rod (313) is rotatably mounted on one side of the two first mounting plates (311) opposite to one another, and there are four first threaded rods (313).

6. The high modulus polyimide film according to claim 5, characterized in that: The four first threaded rods (313) are connected via a belt drive, a second motor (315) is fixedly mounted on the inner wall of the lower first mounting plate (311), and an output shaft of the second motor (315) is fixedly connected to a first threaded rod (313).

7. The high modulus polyimide film according to claim 6, characterized in that: A first guide rod (312) is fixedly mounted on the opposite side of the two first mounting plates (311) on the other side, a connecting block (314) is slidably mounted on the outer wall of the first threaded rod (313) and the first guide rod (312), and the longitudinal stretching roller group (310) is rotatably connected to the connecting block (314).

8. The high modulus polyimide film according to claim 7, characterized in that: The lateral adjustment assembly comprises a second threaded rod (321), the second threaded rod (321) is rotatably mounted on the inner wall of one vertical plate (210), and a second guide rod (322) is fixedly mounted on the inner wall of the other vertical plate (210).

9. The high modulus polyimide film according to claim 8, characterized in that: The outer walls of the second threaded rod (321) and the second guide rod (322) are slidably connected with a sliding block (323).

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