Film coating device for polishing film preparation and preparation method

Abstract

The invention provides a film coating device for polishing film preparation and a preparation method, and relates to the technical field of polishing film preparation, the film coating device comprises a rack, a feeding mechanism is arranged at the top of the rack, the feeding mechanism is used for conveying a base material, a film coating mechanism is arranged on one side of the top of the feeding mechanism, and a drying mechanism is arranged on one side of the film coating mechanism; and the drying mechanism is mounted on the feeding mechanism. According to the film coating device for preparing the polishing film, a base material to be coated with a film is conveyed to the film coating mechanism through the feeding mechanism, the base material is evenly coated with a polishing material in cooperation with the film coating mechanism, the coated base material is dried, the polishing material coated on the surface of the base material is rapidly cured, and then the dried finished polishing film is wound. According to the polishing film preparation device, automatic polishing film preparation is achieved, manual intervention is reduced, and the production efficiency and the product quality are improved.

Description

Technical Field

[0001] The invention relates to the technical field of polishing film preparation, in particular to a film coating device and a preparation method for polishing film preparation. Background Art

[0002] With the advent of the 5G era, the mobile Internet, cloud computing, big data are becoming more prosperous, and large-bandwidth applications such as 4k video are emerging. Global Internet traffic has maintained a sustained high growth trend. In the 400G network deployment of Internet companies and operators at home and abroad, the connection of optical fiber cables is indispensable. The processing of optical fiber cables requires grinding and polishing to ensure their performance. With the increasingly fierce market competition, customers pay more attention to the high cost performance of products, and have higher and higher requirements on the grinding consistency and grinding life of the grinding consumables (polishing films) used.

[0003] However, the coating device used in the prior art polishing film preparation equipment lacks a feeding mechanism, which makes it impossible to smoothly and accurately transport the substrate to the coating area; secondly, it cannot be dried after coating, making it difficult to quickly solidify the polishing material on the surface of the substrate, thereby affecting the quality of the finished polishing film. Therefore, in order to solve the above problems, a coating device and a preparation method for polishing film are proposed. Summary of the invention

[0004] The present invention provides a coating device and a preparation method for preparing a polishing film, which are used to solve at least one of the problems raised by the above background technology.

[0005] In order to solve the above technical problems, the present invention discloses a coating device for preparing a polishing film, comprising a frame, a loading mechanism is arranged on the top of the frame, the loading mechanism is used to convey a substrate, a coating mechanism is arranged on one side of the top of the loading mechanism, a drying mechanism is arranged on one side of the coating mechanism, and the drying mechanism is installed on the loading mechanism.

[0006] Preferably, the feeding mechanism includes a mounting frame, the mounting frame is fixedly connected to the top of the frame, a plurality of driving rollers are installed on the mounting frame, the feed belt is installed on the plurality of driving rollers, and the driving rollers are driven by a driving device, one side of a material guide plate is hinged to one side of the top of the mounting frame, the fixed end of the electric telescopic rod is hinged to the side wall of the mounting frame, and the telescopic end of the electric telescopic rod is hinged to the bottom of the material guide plate.

[0007] Preferably, it further comprises a plurality of groups of material guide components, wherein the plurality of groups of material guide components are respectively installed on the front and rear side walls of the mounting frame at intervals on the left and right sides; The material guide assembly includes two fixed brackets, the bottoms of the two fixed brackets are symmetrically fixed on the front and rear side walls of the mounting frame, and the two guide rollers are connected to the inner walls of the fixed brackets one by one through rotating shafts.

[0008] Preferably, the coating mechanism includes a fixing frame, the bottom of the fixing frame is fixedly mounted on the rear side of the top of the mounting frame, a glue barrel is fixedly mounted on one side of the top of the fixing frame, a glue nozzle is fixedly connected to the fixing frame through a mounting rod, and the glue nozzle is connected to the glue barrel through a rubber hose, the driving motor is fixedly mounted on the other side of the top of the fixing frame, the driving pulley is fixedly mounted on the output shaft of the driving motor, two groups of mounting components are arranged on the front and rear sides of the fixing frame, the coating roller is rotatably connected to the two groups of mounting components through a mounting shaft, and a driven pulley is fixedly mounted on one end of the rotating shaft, and the driven pulley is connected to the driving pulley through a driving belt.

[0009] Preferably, the mounting assembly includes a fixing sleeve, the top of which is fixedly mounted on the top of the fixing frame, and the top of the mounting plate is slidably connected in the fixing sleeve, and the top of the mounting plate is connected to the inner wall of the top of the fixing sleeve via a spring.

[0010] Preferably, the drying mechanism includes a drying box, the bottom of which is fixedly mounted on one side of the top of the mounting frame, the interior of the drying box is divided into cavity one and cavity two by an insulation board, the battery is fixedly mounted on the top of the drying box, the heater is fixedly mounted on the top of the drying box, a filter is embedded on the side wall of cavity one, the fan is fixedly mounted on the top of the insulation board, two nozzles are embedded in the insulation board, and the air outlet of the fan is connected to the two nozzles through a conveying pipe.

[0011] Preferably, a method for preparing a polishing film using the coating device for preparing a polishing film according to any one of claims 1 to 6 comprises the following steps: Step S1: The substrate to be coated is smoothly transported to the coating area through a feeding mechanism; Step S2: Then, the polishing material is evenly coated on the surface of the substrate to be coated in step S1 by a coating mechanism; Step S3: drying the substrate coated in step S2 to solidify the polishing material on the surface of the substrate; Step S4: Roll up the polishing film product after drying in step S3.

[0012] Preferably, the polishing material in step S2 is a polyester, phenolic, epoxy resin system, and a cross-linked interpenetrating network is generated by the mutual reaction between polyester and epoxy, epoxy and phenolic, and phenolic and epoxy resin in the resin system.

[0013] Preferably, the polyester, phenolic and epoxy resin system is used, and the reaction temperature is selected from medium and high molecular weight epoxy resins, the softening point of the epoxy resin is above 120 degrees, and the epoxy equivalent is above 1500.

[0014] The present invention provides a coating device and a preparation method for a polishing film. Compared with the prior art, the present invention has the following beneficial effects: 1. The coating device for preparing the polishing film realizes the loading of the substrate to be coated, the coating of the polishing material and the drying of the polishing film by setting a feeding mechanism, a coating mechanism and a drying mechanism. The entire coating process is automatically controlled, reducing manual intervention and improving production efficiency and product consistency.

[0015] 2. The preparation method of the coating device for preparing the polishing film is constructed by using a coating device for preparing the polishing film, wherein a polyester, phenolic and epoxy resin system is adopted, and the polyester and epoxy, epoxy and phenolic, and phenolic and epoxy resin in the resin system react with each other to generate a cross-linked interpenetrating network. The mutual reaction between phenolic and epoxy resin can increase the hardness of the coating and change the brittleness of the epoxy; the addition of polyester can improve the adhesion of the coating and the wettability of the substrate; thereby obtaining a polishing film product with high strength and good adhesion. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic structural diagram of a coating device for preparing a polishing film provided by an embodiment of the present invention; Figure 2 A schematic structural diagram of a material guide assembly provided in an embodiment of the present invention; Figure 3 A structural schematic diagram of a drying mechanism provided in an embodiment of the present invention; Figure 4 A flow chart of a method for preparing a polishing film provided by an embodiment of the present invention; Figure 5 A schematic diagram of the reaction principle of the polishing material provided in an embodiment of the present invention.

[0018] Reference numerals: 1. Frame; 2. Feeding mechanism; 3. Base material; 4. Coating mechanism; 5. Drying mechanism; 6. Mounting frame; 7. Driving roller; 8. Feeding belt; 9. Guide plate; 10. Electric telescopic rod; 11. Guide assembly; 12. Fixed bracket; 13. Guide roller; 14. Rotating shaft; 15. Fixed frame; 16. Rubber hose; 17. Glue nozzle; 18. Glue barrel; 19. Mounting rod; 20. Driving motor; 21. Driving pulley; 22. Coating roller; 23. Mounting shaft; 24. Driven pulley; 25. Driving belt; 26. Fixed sleeve; 27. Mounting plate; 28. Spring; 29. ​​Drying box; 30. Heat insulation board; 31. Cavity 1; 32. Cavity 2; 33. Battery; 34. Heater; 35. Filter; 36. Fan; 37. Nozzle; 38. Conveying pipeline. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The present invention provides the following embodiments Example 1 The embodiment of the present invention provides a coating device for preparing a polishing film, such as Figure 1-Figure 3 As shown, it includes a frame 1, a feeding mechanism 2 is arranged on the top of the frame 1, and the feeding mechanism 2 is used to convey a substrate 3. A coating mechanism 4 is arranged on one side of the top of the feeding mechanism 2, and a drying mechanism 5 is arranged on one side of the coating mechanism, and the drying mechanism 5 is installed on the feeding mechanism 2.

[0021] Preferably, the feeding mechanism 2 includes a mounting frame 6, the mounting frame 6 is fixedly connected to the top of the frame 1, a plurality of driving rollers 7 are installed on the mounting frame 6, a feed belt 8 is installed on the plurality of driving rollers 7, and the driving rollers 7 are driven by a driving device, one side of a guide plate 9 is hinged to one side of the top of the mounting frame 6, a fixed end of an electric telescopic rod 10 is hinged to the side wall of the mounting frame 6, and a telescopic end of the electric telescopic rod 10 is hinged to the bottom of the guide plate 9.

[0022] Preferably, it further comprises a plurality of groups of material guide components 11, wherein the plurality of groups of material guide components 11 are respectively installed on the front and rear side walls of the mounting frame 6 at intervals on the left and right sides; The material guiding assembly 11 includes two fixed brackets 12 , the bottoms of the two fixed brackets 12 are symmetrically fixedly mounted on the front and rear side walls of the mounting frame 6 , and two guide rollers 13 are connected to the inner walls of the fixed brackets 12 one by one through rotating shafts 14 .

[0023] Preferably, the coating mechanism 4 includes a fixing frame 15, the bottom of which is fixedly mounted on the rear side of the top of the mounting frame 6, a glue barrel 18 is fixedly mounted on one side of the top of the mounting frame 6, a glue nozzle 17 is fixedly connected to the fixing frame 15 through a mounting rod 19, and the glue nozzle 17 is connected to the glue barrel 18 through a hose 16, the driving motor 20 is fixedly mounted on the other side of the top of the fixing frame 15, a driving pulley 21 is fixedly mounted on the output shaft of the driving motor 20, two groups of mounting components are arranged on the front and rear sides of the fixing frame 15, a coating roller 22 is rotatably connected to the two groups of mounting components through a mounting shaft 23, and a driven pulley 24 is fixedly mounted on one end of the rotating shaft 14, and the driven pulley 24 is connected to the driving pulley 21 through a belt.

[0024] Preferably, the mounting assembly includes a fixing sleeve 26, the top of which is fixedly mounted on the top of the fixing frame 15, and the top of the mounting plate 27 is slidably connected in the fixing sleeve 26, and the top of the mounting plate 27 is connected to the inner wall of the top of the fixing sleeve 26 via a spring 28.

[0025] Preferably, the drying mechanism 5 includes a drying box 29, the bottom of which is fixedly mounted on one side of the top of the mounting frame 6, the interior of the drying box 29 is divided into a cavity 1 31 and a cavity 2 32 by a heat insulation board 30, a battery 33 is fixedly mounted on the top of the drying box 29, a heater 34 is fixedly mounted on the top of the drying box 29, a filter screen 35 is embedded on the side wall of the cavity 1 31, a fan 36 is fixedly mounted on the top of the heat insulation board 30, two nozzles 37 are embedded on the heat insulation board 30, and the air outlet of the fan 36 is connected to the two nozzles 37 through a conveying pipe 38.

[0026] The working principle and beneficial effects of the above technical solution are: The coating device for preparing the polishing film is provided with a feeding mechanism 2, a coating mechanism 4 and a drying mechanism 5, thereby realizing the feeding of the substrate 3 to be coated, the coating of the polishing material and the drying of the polishing film. The feeding mechanism 2 is provided with a plurality of driving rollers 7 mounted on the mounting frame 6, and the conveyor belt 8 is mounted on the plurality of driving rollers 7. The driving rollers 7 are driven by the driving device, so that the substrate 3 to be coated placed on the conveyor belt 8 is smoothly and accurately conveyed to the coating area; secondly, one side of the guide plate 9 is hinged to one side of the top of the mounting frame 6, and the fixed end of the electric telescopic rod 10 is hinged to the side wall of the mounting frame 6. The angle of the guide plate 9 can be adjusted by the extension of the electric telescopic rod 10, so as to ensure that the substrate 3 can be smoothly fed to the conveyor belt 8; at the same time, a plurality of groups of guide components 11 are arranged on both sides of the conveyor belt 8, and the bottoms of the two fixed brackets 12 are fixedly mounted on the front and rear side walls of the mounting frame 6 symmetrically in front and back, and the two guide rollers 13 are connected to the inner wall of the fixed bracket 12 one by one through the rotating shaft 14, respectively. The guide rollers 13 arranged on the front and rear sides of the conveyor belt 8 can realize automatic deviation correction of the substrate 3 to be coated during the conveying process, so as to ensure that the substrate 3 remains straight during the transmission process and avoid uneven coating.

[0027] The coating mechanism 4 includes a glue barrel 18 fixedly mounted on one side of the top of the fixed frame 15, a glue nozzle 17 fixedly connected to the fixed frame 15 through a mounting rod 19, and the glue nozzle 17 is connected to the glue barrel 18 through a hose 16. When the substrate 3 needs to be coated, the glue nozzle 17 evenly sprays the polishing material transported from the glue barrel 18 through the hose 16 onto the surface of the substrate 3, wherein the moving speed and coating amount of the feed belt 8 are accurately controlled so that the polishing material can be evenly coated on the surface of the substrate 3; at the same time, the driving motor 20 is fixedly mounted on the other side of the top of the fixed frame 15, and the driving pulley 21 is fixedly mounted on the output shaft of the driving motor 20, and the driving motor 20 drives the driving pulley 21 to rotate, and the driven pulley 24 and the driving pulley 21 are driven by the driven pulley 24. The coating roller 22 is connected to the two groups of mounting components through the mounting shaft 23, and the mounting components include a fixed sleeve 26, the top of which is fixedly mounted on the top of the fixing frame 15, and the top of the mounting plate 27 is slidably connected in the fixed sleeve 26, and the top of the mounting plate 27 is connected to the inner wall of the top of the fixed sleeve 26 through a spring 28, so that the coating roller 22 water tank on the mounting shaft 23 can be rotated, and the polishing material sprayed on the surface of the substrate 3 is scraped flat and effectively fitted. Secondly, the fixed sleeve 26 and the mounting plate 27 connected by the spring 28 can rely on the elastic force of the spring 28 to ensure that the coating roller 22 is always in contact with the surface of the substrate 3, while improving the reliability of coating.

[0028] The drying mechanism 5 comprises a drying box 29, the interior of which is divided into a cavity 1 31 and a cavity 2 32 by a heat insulation board 30, a battery 33 is fixedly mounted on the top of the drying box 29, a heater 34 is fixedly mounted on the top of the drying box 29, the battery 33 provides power to the heater 34, so that the heater 34 generates heat when it operates, thereby causing the temperature of the air in the cavity 1 31 to rise sharply, and at the same time, a fan 36 fixedly mounted on the top of the heat insulation board 30 starts to operate, so that the outside air enters the cavity 1 31 from the filter 35 embedded on the side wall of the cavity 1 31, and then the hot air in the cavity 1 31 enters from the air inlet of the fan 36, and is transported from the fan 36 to the nozzle 37 through the conveying pipe 38, so that the nozzle 37 blows out hot air to dry the coated substrate 3, and the polishing material coated on the surface of the substrate 3 is quickly solidified through heating and ventilation; finally, the finished polishing film after drying is rolled up and stored.

[0029] The above-mentioned coating device for preparing the polishing film completes loading, coating and drying from the substrate 3, and has the following advantages: first, the feeding mechanism 2 and the coating mechanism 4 are used to ensure that the polishing material is evenly coated on the surface of the substrate 3, thereby improving the quality of the polishing film; second, the entire substrate 3 coating process is automatically controlled to reduce manual intervention and improve production efficiency and product consistency; third, the coating parameters and process conditions can be adjusted according to the requirements of different substrates 3 and polishing materials to meet the production needs of different products; fourth, an efficient drying system and energy-saving technology are used to reduce energy consumption and emissions, thereby meeting environmental protection requirements.

[0030] Example 2 Based on Example 1, a method for preparing a polishing film using a coating device for preparing a polishing film as described in any one of claims 1 to 6 is provided, such as Figure 4-Figure 5 As shown, the polishing film preparation method comprises the following steps: ; Step S2: Then, the polishing material is evenly coated on the surface of the substrate 3 to be coated in step S1 by the coating mechanism 4; Step S3: drying the substrate 3 coated in step S2 to solidify the polishing material on the surface of the substrate 3; Step S4: Roll up the polishing film product after drying in step S3 to facilitate subsequent processing and use.

[0031] Preferably, the polishing material in step S2 is a polyester, phenolic, epoxy resin system, and a cross-linked interpenetrating network is generated by the mutual reaction between polyester and epoxy, epoxy and phenolic, and phenolic and epoxy resin in the resin system.

[0032] Preferably, the polyester, phenolic and epoxy resin system is used, and the reaction temperature is selected from medium and high molecular weight epoxy resins, the softening point of the epoxy resin is above 120 degrees, and the epoxy equivalent is above 1500.

[0033] The working principle and beneficial effects of the above technical solution are: The preparation method of the coating device for preparing the above-mentioned polishing film is as follows: first, the substrate 3 to be coated is smoothly transported to the coating area through the feeding mechanism 2; then, the polishing material is evenly coated on the surface of the substrate 3 to be coated through the coating mechanism 4; at the same time, the coated substrate 3 is dried to solidify the polishing material on the surface of the substrate 3; finally, the finished polishing film after drying is rolled up for subsequent processing and use.

[0034] At the same time, the polishing material of the present invention adopts a polyester, phenolic, epoxy resin system, and utilizes the mutual reaction between polyester and epoxy, epoxy and phenolic, and phenolic and epoxy resin in the resin system to form a cross-linked interpenetrating network. The reaction principle is as follows: Figure 5 . The mutual reaction between phenolic and epoxy resin can improve the hardness of the coating and change the brittleness of epoxy; the addition of polyester can improve the adhesion of the coating and the wettability of the substrate 3; thus, a polishing film product with high strength and good adhesion is obtained, which effectively guarantees the quality of the finished polishing film. Since the reaction temperature between the three in this system is relatively high, the curing temperature range of epoxy and phenolic is very wide (60-120 degrees), the reaction temperature of polyester and epoxy group is about 204 degrees, and the reaction temperature of polyester and phenolic is about 120-150 degrees, so it is necessary to select medium and high molecular weight epoxy resin, the softening point of epoxy resin is above 120 degrees, and the epoxy equivalent should be above 1500, otherwise the polishing film product is prone to adhesion during the later curing. In the polyester, phenolic and epoxy resin system of the above invention, epoxy and phenolic resins are relatively miscible. Since the molecular weight of polyester resin is relatively large, its compatibility with phenolic resin is poor compared to epoxy. Therefore, ketone and benzene solvents with good polarity are generally selected to make polishing films with this system. The polyester resin can improve the adhesion between the coating and the substrate 3, and the phenolic and epoxy can improve the hardness and heat resistance of the coating, thereby improving the wear resistance of the coating and increasing the life of the product.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A coating device for preparing a polishing film, characterized in that: The invention comprises a frame (1), wherein a feeding mechanism (2) is arranged on the top of the frame (1), wherein the feeding mechanism (2) is used to convey a substrate (3), a coating mechanism (4) is arranged on one side of the top of the feeding mechanism (2), a drying mechanism (5) is arranged on one side of the coating mechanism, and the drying mechanism (5) is installed on the feeding mechanism (2).

2. A coating device for preparing a polishing film according to claim 1, characterized in that: The feeding mechanism (2) comprises a mounting frame (6), the mounting frame (6) is fixedly connected to the top of the frame (1), a plurality of driving rollers (7) are mounted on the mounting frame (6), a feeding belt (8) is mounted on the plurality of driving rollers (7), and the driving rollers (7) are driven by a driving device, one side of a material guide plate (9) is hinged to one side of the top of the mounting frame (6), a fixed end of an electric telescopic rod (10) is hinged to a side wall of the mounting frame (6), and a telescopic end of the electric telescopic rod (10) is hinged to the bottom of the material guide plate (9).

3. A coating device for preparing a polishing film according to claim 2, characterized in that: It also includes a plurality of groups of material guide components (11), which are respectively installed on the front and rear side walls of the mounting frame (6) at intervals on the left and right sides; The material guide assembly (11) comprises two fixed brackets (12), the bottoms of the two fixed brackets (12) are symmetrically fixedly mounted on the front and rear side walls of the mounting frame (6), and the two guide rollers (13) are respectively connected to the inner walls of the fixed brackets (12) in a one-to-one correspondence via rotating shafts (14).

4. A coating device for preparing a polishing film according to claim 1, characterized in that: The coating mechanism (4) comprises a fixing frame (15), the bottom of which is fixedly mounted on the rear side of the top of the mounting frame (6), a glue barrel (18) is fixedly mounted on one side of the top of the fixing frame (15), a glue nozzle (17) is fixedly connected to the fixing frame (15) via a mounting rod (19), and the glue nozzle (17) is connected to the glue barrel (18) via a rubber hose (16), the driving motor (20) is fixedly mounted on the other side of the top of the fixing frame (15), a driving pulley (21) is fixedly mounted on the output shaft of the driving motor (20), two groups of mounting components are arranged on the front and rear sides of the fixing frame (15), a coating roller (22) is rotatably connected to the two groups of mounting components via a mounting shaft (23), and a driven pulley (24) is fixedly mounted on one end of the rotating shaft (14), and the driven pulley (24) is connected to the driving pulley (21) via a driving belt (25).

5. A coating device for preparing a polishing film according to claim 4, characterized in that: The mounting assembly comprises a fixing sleeve (26), the top of the fixing sleeve (26) is fixedly mounted on the top of the fixing frame (15), and the top of the mounting plate (27) is slidably connected in the fixing sleeve (26), and the top of the mounting plate (27) is connected to the inner wall of the top of the fixing sleeve (26) via a spring (28).

6. The coating device for preparing a polishing film according to claim 1, characterized in that: The drying mechanism (5) comprises a drying box (29), the bottom of the drying box (29) is fixedly mounted on one side of the top of the mounting frame (6), the interior of the drying box (29) is divided into a cavity one (31) and a cavity two (32) by a heat insulation board (30), a storage battery (33) is fixedly mounted on the top of the drying box (29), a heater (34) is fixedly mounted on the top of the drying box (29), a filter screen (35) is embedded on the side wall of the cavity one (31), a fan (36) is fixedly mounted on the top of the heat insulation board (30), two nozzles (37) are embedded on the heat insulation board (30), and an air outlet of the fan (36) is connected to the two nozzles (37) through a conveying pipe (38).

7. A method for preparing a polishing film using the coating device for preparing a polishing film according to any one of claims 1 to 6, the method comprising the following steps: Step S1: The substrate (3) to be coated is smoothly transported to the coating area through the feeding mechanism (2); Step S2: Then, the polishing material is evenly coated on the surface of the substrate (3) to be coated in step S1 by a coating mechanism (4); Step S3: drying the substrate (3) coated in step S2 to solidify the polishing material on the surface of the substrate (3); Step S4: Roll up the polishing film product after drying in step S3.

8. The method for preparing a polishing film according to claim 7, characterized in that: The polishing material in step S2 is a polyester, phenolic, epoxy resin system, and a cross-linked interpenetrating network is generated by the mutual reaction between polyester and epoxy, epoxy and phenolic, and phenolic and epoxy resin in the resin system.

9. The method for preparing a polishing film according to claim 8, characterized in that: The polyester, phenolic and epoxy resin system is used, and the reaction temperature is selected from medium and high molecular weight epoxy resins. The softening point of the epoxy resin is above 120 degrees, and the epoxy equivalent is above 1500.

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