Self-adhesive special-shaped mica die cutting part and integrated production system thereof

Abstract

The invention relates to the technical field of special-shaped mica die cutting part machining, in particular to a self-adhesion type special-shaped mica die cutting part and an integrated production system thereof. A self-adhesion type special-shaped mica die cutting part comprises a mica composite layer and a self-adhesion layer, the mica composite layer is prepared by hot pressing of multiple layers of phlogopite paper and glass fiber gridding cloth, and the glass fiber gridding cloth is located on the upper surface and the lower surface of the mica composite layer; the self-adhesive layer is made of an adhesive with an IPN structure; the adhesive with the IPN structure contains polyurethane resin with a linear structure and acrylate resin capable of forming a cross-linked network structure; the phlogopite paper contains 15-20wt% of modified organic silica gel, and the modified organic silica gel contains active double bonds. The self-adhesive special-shaped mica die cutting part has good flame-retardant protection performance, the thermal runaway safety performance of the whole new energy automobile can be effectively improved, the production process of the self-adhesive special-shaped mica die cutting part is optimized, the production efficiency is improved, the overall production cost is reduced, and the market competitiveness of similar products is improved.

Description

Technical Field

[0001] The present application relates to the technical field of processing special-shaped mica die-cut parts, and in particular to a self-adhesive special-shaped mica die-cut part and an integrated production system thereof. Background Art

[0002] Insulation materials are one of the most commonly used materials in the field of electrical insulation materials. They are used to ensure the safety performance and long-term stable operation performance of electrical and electrical products. They have been widely used in new energy vehicles, aerospace, lithium battery modules, electronic appliances, motors, telecommunications and other fields. Mica materials have excellent electrical insulation properties, chemical stability, heat resistance and fire resistance, high dielectric strength, large dielectric constant and low dielectric loss, making them one of the best insulation raw materials.

[0003] With the rapid development of new energy vehicles, mica insulating protective materials developed with mica as the base material can play a good flame retardant insulating effect, which can ensure the flame retardant insulating safety performance of new energy vehicle battery modules, making it well adapted to the new energy vehicle industry and has been widely used in the new energy vehicle industry.

[0004] Existing mica insulating protective materials are mainly mica tapes and mica plates, and their shapes are mainly two-dimensional plane structures. The above three conventional mica insulating protective materials provide flame retardant insulation protection for electrical devices in a coating or embedding manner. However, most of the components in new energy vehicles have a three-dimensional structure, making it difficult for existing mica insulating protective materials to meet the development requirements of new energy vehicles.

[0005] In order to solve the problem that mica insulation protection materials are not compatible with the development of new energy vehicles, a three-dimensional structured special-shaped mica die-cut parts have been developed. The preparation process is as follows: flexible mica paper with a high glue content of ≥20wt% is used as the base material, and the flexible mica paper is stacked to a certain thickness and preheated and pressed to obtain a prefabricated flexible mica board. The prefabricated flexible mica board is molded to form a special-shaped mica part that is suitable for the parts in new energy vehicles. The special-shaped mica part is die-cut to obtain a finished special-shaped mica die-cut part. The application scenarios of the finished special-shaped mica die-cut parts are as follows: the outer shell of the lithium battery module installed in the new energy vehicle, between the cells in the battery module, as the top plate of the battery module outer shell, etc., which has a good flame retardant insulation effect and improves the thermal runaway safety performance of the whole vehicle.

[0006] With respect to the special-shaped mica die-cut parts in the prior art, the inventors have found the following defects: 1. The special-shaped mica die-cut parts need to be subsequently treated with back glue to facilitate installation and fixation on the battery module. The back glue generally adopts silicone-modified acrylate adhesive. The main reason is that the bonding component in the special-shaped mica die-cut parts is a silicone resin component, which makes its bonding stability deviate from that of conventional polyurethane adhesives. Although the bonding stability of silicone-modified acrylate adhesive is better than that of conventional polyurethane adhesives, its overall bonding strength is not high. The special-shaped mica die-cut parts are prone to debonding when subjected to long-term vibration, which limits the application scope of the special-shaped mica die-cut parts. To this end, the inventors provide a self-adhesive special-shaped mica die-cut parts and an integrated production system thereof. Summary of the invention

[0007] In order to solve the above technical problems, the present application provides a self-adhesive special-shaped mica die-cut part and an integrated production system thereof.

[0008] The self-adhesive special-shaped mica die-cut part provided by the present invention is realized by the following scheme: A self-adhesive special-shaped mica die-cut part comprises a mica composite layer and a self-adhesive layer, wherein the mica composite layer is obtained by hot pressing multiple layers of phlogopite mica paper and glass fiber mesh cloth, and the glass fiber mesh cloth is located on the upper and lower surfaces of the mica composite layer; the self-adhesive layer is made of an adhesive with an IPN structure; the adhesive with the IPN structure contains a polyurethane resin with a linear structure and an acrylate resin that can form a cross-linked network structure; the phlogopite mica paper contains 15-20wt% of modified organic silica gel, and the modified organic silica gel contains active double bonds.

[0009] During the preparation stage of the self-adhesive special-shaped mica die-cut parts in the present invention, the modified organic silica gel in the phlogopite paper contains active double bonds. During the hot pressing process with the adhesive of the IPN structure, the modified organic silica gel in the phlogopite paper contains active double bonds and the active double bonds in the adhesive of the IPN structure undergo double bond polymerization reaction under the action of a high-temperature initiator, so that the adhesive of the IPN structure is chemically bonded to the special-shaped mica die-cut parts, which greatly improves the bonding strength and bonding stability of the adhesive and the special-shaped mica die-cut parts. The IPN structure of the adhesive can play a good damping and shock-absorbing effect, thus giving the present invention good flame retardant protection performance and shock-absorbing and noise-reducing performance, which can effectively improve the thermal runaway safety performance of new energy vehicles and expand its scope of use. In addition, the inventor further optimizes the production process of self-adhesive special-shaped mica die-cut parts, which can realize the one-step production of self-adhesive special-shaped mica die-cut parts, effectively improve the production effect of self-adhesive special-shaped mica die-cut parts, reduce the overall production cost, and give it better market competitiveness.

[0010] Preferably, the phlogopite paper is made from the following raw materials in parts by weight: 15-20 parts of modified silicone resin, 70-80 parts of phlogopite, 5-10 parts of toughening filler composition, and 5-10 parts of organic solvent; the toughening filler composition is at least one of nano-silicon dioxide, nano-aluminum oxide, nano-magnesium oxide, aluminum nitride whisker, graphene, and carbon nanotubes; the modified silicone resin is composed of a condensation-type silicone resin prepolymer and an addition-type silicone resin prepolymer; and the organic solvent is any one of toluene, xylene, acetone, and DMF.

[0011] By adopting the above technical scheme, on the one hand, the glue content in the self-adhesive special-shaped mica die-cut parts is controlled, and the overall flexibility is improved while ensuring its flame retardant safety performance and insulation safety performance, which is beneficial to improving the processing yield rate of the self-adhesive special-shaped mica die-cut parts, thereby saving the overall production cost; on the other hand, the modified silicone resin composed of the condensation silicone resin prepolymer and the addition silicone resin prepolymer can form a finished phlogopite paper by allowing the condensation silicone resin prepolymer to undergo a thermal condensation reaction at medium and low temperatures. The addition silicone resin prepolymer contained in the finished phlogopite paper undergoes a double bond reaction in the hot molding stage of S2 to form a semi-finished special-shaped mica part, which can effectively improve the flexibility and processing yield rate of the semi-finished special-shaped mica parts, and can be hot-molded to obtain special-shaped mica parts with complex structures, which can meet the production needs of different components of new energy vehicles.

[0012] Preferably, the addition-type silicone resin prepolymer contains at least hydroxyl-terminated silicone oil modified with side chain acrylate; the mass ratio of the condensation-type silicone resin prepolymer to the addition-type silicone resin prepolymer is 1:(2-4).

[0013] Preferably, the acrylic resin that can form a cross-linked network structure is made of acrylic resin, a cross-linking agent, and an inhibitor; the acrylic resin is at least one of methyl acrylate, ethyl acrylate, 2-methyl methacrylate, 2-ethyl methacrylate, methyl methacrylate, ethyl methacrylate, propyl methacrylate, isopropyl methacrylate, and benzyl methacrylate; the cross-linking agent is at least one of trimethylolpropane triacrylate, neopentyl glycol diacrylate, and tripropylene glycol diacrylate.

[0014] Preferably, the linear polyurethane resin is composed of a diisocyanate-terminated polyurethane prepolymer, a polycarbonate diol with a molecular weight of 1000-2000, a chain extender, an organic tin catalyst, and an antioxidant; the R value of the diisocyanate-terminated polyurethane prepolymer is 1.2-1.5; the R value of the linear polyurethane resin is 0.99-1.0; the chain extender is one of 1,4-butanediol, 1,5-pentanediol, and 1,6-hexanediol.

[0015] The self-adhesive layer formed by the adhesive with the above-mentioned IPN structure can not only play a good bonding and fixing effect, but also improve the overall buffering and shock absorption effect of the self-adhesive special-shaped mica die-cut parts, give the overall better safety protection performance, and enhance the NVH performance of the new energy vehicle.

[0016] Preferably, the preparation method of the mica composite layer is as follows: Step 1, firstly, uniformly mixing the accurately measured condensation type silicone resin prepolymer and the addition type silicone resin prepolymer to obtain a modified silicone resin; Step 2, uniformly mixing accurately measured modified silicone resin, phlogopite, and toughening filler composition to prepare mica slurry; Step 3, the mica slurry in step 2 is cast-rolled to prepare 0.1-0.4 mm thick phlogopite paper, and the obtained phlogopite paper is subjected to aging treatment to obtain finished phlogopite paper; Step three, stacking and compounding a plurality of finished phlogopite mica papers to form a prefabricated mica board, stacking glass fiber mesh cloths on the surfaces of the prefabricated mica boards, and then preheating and pressing to form a mica composite layer.

[0017] The preparation method of the mica composite layer in the present invention is relatively simple and is convenient for realizing batch production.

[0018] Preferably, in step three, multiple sheets of finished phlogopite paper are stacked and preheated to obtain a semi-finished mica composite board, the roller surface temperature of the preheating press is 100-160°C, and the rolling pressure is 5-10kg; the surface of the semi-finished mica composite board is stacked with glass fiber mesh cloth and then preheated and pressed to obtain a mica composite layer, the roller surface temperature of the preheating press is 100-120°C, and the rolling pressure is 10-15kg.

[0019] By adopting the above-mentioned preheating and pressing forming process, the quality stability of the same batch of phlogopite mica paper can be guaranteed, thereby ensuring the quality and quality stability of the finished self-adhesive special-shaped mica die-cut parts.

[0020] Preferably, the method for preparing the self-adhesive special-shaped mica die-cut parts comprises the following steps: S1, preparation of mica composite layer; and preparation of IPN structural tape at the same time; S2, removing a layer of release paper on the IPN structural tape, attaching the IPN structural tape adhesive with a layer of release paper to the surface of the mica composite layer in S1, and hot pressing to obtain a coated mica composite board; S3, cutting and modifying the rubber-coated mica composite board, and hot-molding the obtained rubber-coated mica composite board to obtain a semi-finished special-shaped mica part; S4, die-cutting the semi-finished special-shaped mica piece to obtain a finished self-adhesive special-shaped mica die-cut piece.

[0021] The preparation method of the self-adhesive special-shaped mica die-cut parts of the present invention is relatively simple, and is convenient for realizing mass production, thereby reducing the overall production cost of the self-adhesive special-shaped mica die-cut parts.

[0022] Preferably, the preparation method of the adhesive of the IPN structure in S1 is as follows: Preparation of linear polyurethane resin prepolymer: uniformly mix diisocyanate-terminated polyurethane prepolymer, polycarbonate diol with a molecular weight of 1000-2000, chain extender, organic tin catalyst, and antioxidant, heat to 65-95° C., and react for 30-45 minutes to obtain linear polyurethane resin prepolymer; Preparation of acrylic resin capable of forming a cross-linked network structure: uniformly mixing accurately measured acrylic resin, cross-linking agent, and polymerization inhibitor to obtain acrylic resin capable of forming a cross-linked network structure; Under nitrogen protection at 40-50°C, add 20-60 parts of an acrylic resin capable of forming a cross-linked network structure to 100 parts of a linear polyurethane resin prepolymer, stir at 60-80 rpm for 15-30 min, mix well, cool to room temperature, and store away from light to obtain an IPN structured adhesive product.

[0023] The preparation method of the adhesive with the IPN structure in the present invention is relatively simple, and is convenient for realizing mass production and manufacturing, thereby reducing the production cost of the adhesive with the IPN structure, and further reducing the overall production cost of the self-adhesive special-shaped mica die-cut parts.

[0024] The present invention provides an integrated production system for self-adhesive special-shaped mica die-cut parts, which is realized by the following technical solutions: The invention discloses an integrated production system for self-adhesive special-shaped mica die-cut parts, comprising an IPN structural tape production subsystem, a plurality of mica slurry batching subsystems, a plurality of mica paper casting subsystems, a prefabricated mica composite board hot-pressing subsystem and a semi-finished special-shaped mica part hot-pressing subsystem. The mica slurry outputted from the mica slurry batching subsystem is cast by a mica paper casting subsystem to form phlogopite paper with release paper; the phlogopite paper outputted from the mica paper casting subsystems is synchronously moved with a glass fiber mesh cloth and an IPN structural tape to a prefabricated mica composite board hot-pressing subsystem for pre-heating and pressing to obtain a prefabricated mica composite board; the obtained prefabricated mica composite board is input into a special-shaped mica part hot-pressing machine for hot-pressing and forming to obtain a semi-finished special-shaped mica part; the semi-finished special-shaped mica part is transmitted to a die-cutting machine for die-cutting to obtain a finished self-adhesive special-shaped mica die-cut part.

[0025] Through the integrated production system of self-adhesive special-shaped mica die-cut parts, finished self-adhesive special-shaped mica die-cut parts of different thicknesses can be prepared, and the production efficiency of the self-adhesive special-shaped mica die-cut parts can be improved, the overall production cost of the self-adhesive special-shaped mica die-cut parts is reduced, and the market competitiveness of similar products is improved.

[0026] In summary, this application has the following advantages: 1. The present invention has good flame retardant protection performance, can effectively improve the thermal runaway safety performance of new energy vehicles, and after the production efficiency of the self-adhesive special-shaped mica die-cut parts is optimized, the overall production cost is reduced, giving it better market competitiveness.

[0027] 2. The preparation method of the self-adhesive special-shaped mica die-cut parts provided by the present invention is relatively simple, which is convenient for industrial mass production and manufacturing, optimizes the overall production cost, and enhances the market competitiveness of the products.

[0028] 3. Through the integrated production system of self-adhesive special-shaped mica die-cut parts, finished self-adhesive special-shaped mica die-cut parts of different thicknesses can be prepared to meet the production needs of different parts of new energy vehicles.

[0029] 4. The integrated production system of self-adhesive shaped mica die-cut parts can improve the production efficiency of self-adhesive shaped mica die-cut parts, reduce the production cost of self-adhesive shaped mica die-cut parts, improve the quality of self-adhesive shaped mica die-cut parts finished products and the quality stability of the same batch, and enhance the market competitiveness of similar products. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the self-adhesive special-shaped mica die-cut part of the present invention.

[0031] Figure 2 It is a structural schematic diagram of an integrated production system for self-adhesive special-shaped mica die-cut parts in the present invention.

[0032] Figure 3 It is a structural schematic diagram of the IPN structural tape production subsystem in the integrated production system of self-adhesive special-shaped mica die-cut parts.

[0033] Figure 4 It is a structural schematic diagram of a mica slurry batching subsystem in an integrated production system for self-adhesive special-shaped mica die-cut parts.

[0034] Figure 5 It is a structural schematic diagram of the mica paper casting subsystem in the integrated production system of self-adhesive special-shaped mica die-cut parts.

[0035] Figure 6 It is a structural schematic diagram of the prefabricated mica composite board hot pressing subsystem in the integrated production system of self-adhesive special-shaped mica die-cut parts.

[0036] In the figure, 1. IPN structural tape production subsystem; 100. Mica composite layer; 101. Phlogopite paper; 102. Glass fiber mesh cloth; 103. Self-adhesive layer; 11. Release paper A storage roller; 111. Guide roller A; 112. Guide roller B; 113. Transport roller A; 114. Transport roller B; 12. Release paper B storage roller; 121. Guide roller a; 122. Guide roller b; 13. Glue coating machine; 14. Scraper; 15. Tape composite roller group; 16. Oven; 17. Guide roller group; 2. Mica slurry batching subsystem; 21. Phlogopite storage tank; 22. Toughening filler storage tank; 23. Modified organic silica gel storage tank; 24. Preparation kettle; 25. Grouting pipe group ; 3. Mica paper casting subsystem; 31. Release paper C storage roller; 32. Tension adjustment roller group; 33. Transfer roller C; 34. Mica paper casting roller group; 340. Preheating roller group; 35. Evaporation box; 36. Oven B; 37. Release paper C peeling roller group; 371. Transfer roller D; 372. Release paper C recovery roller; 373. Phlogopite paper guide roller; 4. Prefabricated mica composite board hot pressing subsystem; 41. Phlogopite mica paper transmission roller group; 42. First hot pressing composite roller group; 43. Second hot pressing roller group; 44. Release paper B peeling roller group; 440. Glass fiber mesh cloth storage roll; 45. Shearing machine; 46. Mica parts hot press; 5. Semi-finished special-shaped mica parts hot press. DETAILED DESCRIPTION

[0037] In order to further understand the creativity and technical progress of the present invention, the preferred embodiments of the present invention are discussed in detail in combination with examples and comparative examples. It should be noted that: this specific embodiment is only an explanation of the technical solution of the present invention, and it is not a limitation of the present invention. After reading this specification, those skilled in the art can make modifications to the present embodiment without creative contribution as needed, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law. Example

[0038] refer to Figure 1 A self-adhesive special-shaped mica die-cut part includes a mica composite layer 100 and a self-adhesive layer 103 composited on a surface of the mica composite layer 100, and the mica composite layer 100 is made of multiple layers of gold mica paper 101 and glass fiber mesh cloth 102. The glass fiber mesh cloth 102 is located on the upper and lower surfaces of the mica composite layer 1, which can provide good wear resistance and enhance the overall mechanical strength. The self-adhesive layer 103 is made of an adhesive with an IPN structure. The adhesive with an IPN structure contains a polyurethane resin with a linear structure and an acrylic resin that can form a cross-linked network structure, which can form a chemical bond with the adhesive in the mica composite layer 100, effectively improving the bonding stability of the self-adhesive special-shaped mica die-cut part itself, and at the same time can have a buffering and shock-absorbing effect.

[0039] The phlogopite paper 101 contains 15-20wt% of modified organic silica gel, and the modified organic silica gel contains active double bonds. Specifically, the phlogopite paper 11 is made from the following raw materials in parts by weight: 15-20 parts of modified organic silicone resin, 70-80 parts of phlogopite, 5-10 parts of toughening filler composition, and 5-10 parts of organic solvent.

[0040] The organic solvent is any one of toluene, xylene, acetone and DMF, preferably toluene.

[0041] The toughening filler composition is at least one of nano silicon dioxide, nano aluminum oxide, nano magnesium oxide, aluminum nitride whisker, graphene and carbon nanotube.

[0042] The modified silicone resin is composed of a condensation silicone resin prepolymer and an addition silicone resin prepolymer. Preferably, the addition silicone resin prepolymer contains at least a hydroxyl-terminated silicone oil modified with a side chain acrylate; the mass ratio of the condensation silicone resin prepolymer to the addition silicone resin prepolymer is 1:(2-4).

[0043] The acrylic resin capable of forming a cross-linked network structure is made of an acrylic resin, a cross-linking agent, and a polymerization inhibitor. The acrylic resin is at least one of methyl acrylate, ethyl acrylate, methyl 2-methacrylate, ethyl 2-methacrylate, methyl methacrylate, ethyl methacrylate, propyl methacrylate, isopropyl methacrylate, and benzyl methacrylate. The cross-linking agent is at least one of trimethylolpropane triacrylate, neopentyl glycol diacrylate, and tripropylene glycol diacrylate.

[0044] The linear polyurethane resin is composed of a diisocyanate-terminated polyurethane prepolymer, a polycarbonate diol with a molecular weight of 1000-2000, a chain extender, an organic tin catalyst, and an antioxidant. The R value of the diisocyanate-terminated polyurethane prepolymer is 1.2-1.5. The R value of the linear polyurethane resin is 0.99-1.0. The chain extender is one of 1,4-butanediol, 1,5-pentanediol, and 1,6-hexanediol.

[0045] The preparation of self-adhesive special-shaped mica die-cut parts relies on special equipment, that is, an integrated production system of self-adhesive special-shaped mica die-cut parts, which can improve the production efficiency of self-adhesive special-shaped mica die-cut parts, reduce the production cost of self-adhesive special-shaped mica die-cut parts, improve the quality of self-adhesive special-shaped mica die-cut parts and the quality stability of the same batch, and enhance the market competitiveness of similar products. In addition, the waste generated in the prefabricated mica composite board hot pressing subsystem 4 can be recycled to reduce the discharge of industrial waste and improve resource utilization.

[0046] join Figure 2An integrated production system for self-adhesive special-shaped mica die-cut parts includes an IPN structural tape production subsystem 1, a plurality of mica slurry batching subsystems 2, a plurality of mica paper casting subsystems 3, a prefabricated mica composite board hot pressing subsystem 4 and a semi-finished special-shaped mica part hot pressing machine 5.

[0047] join Figure 2 The operation of the integrated production system of self-adhesive special-shaped mica die-cut parts is as follows: the mica slurry output by the mica slurry batching subsystem 2 is cast by the mica paper casting subsystem 3 to form phlogopite paper with release paper. The phlogopite paper output by the mica paper casting subsystem 3 is synchronously moved to the prefabricated mica composite board hot pressing subsystem 4 with the glass fiber mesh cloth and the IPN structural tape for pre-heating and pressing to obtain the prefabricated mica composite board. The obtained prefabricated mica composite board is input into the special-shaped mica part hot pressing machine 5 for hot pressing and forming to obtain the semi-finished special-shaped mica part. The semi-finished special-shaped mica part is transmitted to the die-cutting machine for die-cutting processing to obtain the finished self-adhesive special-shaped mica die-cut parts.

[0048] join Figure 2 and Figure 3 The IPN structural tape production subsystem 1 includes a release paper A receiving roller 11, a release paper B receiving roller 12, a guide roller A111 located downstream of the release paper A receiving roller 11, a guide roller B112, a transmission roller A113, a guide roller a121 located downstream of the release paper B receiving roller 12, a guide roller b122, a transmission roller a123, a glue coater 13 located downstream of the transmission roller A113, a scraper 14 located downstream of the glue coater 13, a transmission roller B114 located downstream of the scraper 14, a tape composite roller group 15 located downstream of the transmission roller B114, an oven A16 located downstream of the tape composite roller group 15, and a guide roller group 17 located downstream of the oven A16.

[0049] join Figure 2 and Figure 3 , the glue coating machine 13 stores the freshly prepared IPN structural adhesive. The release paper A unwound from the release paper A receiving roller 11 is horizontally transported to the glue coating machine 13 through the guide roller A111, the guide roller B112, and the transmission roller A113. The glue coating machine 13 discharges the adhesive on the upper surface of the release paper A, and after being leveled by the scraper 14, a single-sided composite release paper tape (the structure is IPN structural adhesive / release paper A) is obtained. The single-sided composite release paper tape enters the tape composite roller group 15 under the transmission of the transmission roller B114. The release paper B unwound from the release paper B receiving roller 12 is input into the tape composite roller group 15 through the guide roller a121, the guide roller b122, and the transmission roller a123. Under the hot pressing and laminating of the tape composite roller group 15, the release paper B is composited on the upper surface of the single-sided composite release paper tape to form a double-sided composite release paper tape (the structure is release paper A / IPN structural adhesive / release paper B).

[0050] join Figure 2 and Figure 3 , the roller surface temperature of the tape composite roller group 15 is 80-85℃. The oven A16 is divided into a front-end linear transmission drying zone (temperature 80℃) and a rear-end serpentine transmission drying zone (temperature 60℃). The length of the front-end linear transmission is 4-8 times the length of the rear-end serpentine transmission, and preferably the length of the front-end linear transmission is 6 times the length of the rear-end serpentine transmission. The double-sided composite release paper tape is input into the guide roller group 17 after being heat-dried in the oven A16, and then input into the prefabricated mica composite board hot pressing subsystem 4 after passing through the guide roller group 17, and the IPN structural adhesive is compounded on the upper surface of the semi-finished prefabricated mica board A.

[0051] join Figure 2 and Figure 3 The distance between the scraper 14 and the release paper A is controlled and adjusted by a cylinder fixedly connected to the scraper 14. The thickness of the IPN structural adhesive on the release paper A is controlled by the glue output per unit time of the glue coating machine 13, the transmission speed of the release paper A and the distance between the scraper 14 and the release paper A. The structure of the finished IPN structural adhesive tape output by the guide roller group 17 is release paper A / IPN structural adhesive / release paper B, and the thickness of the IPN structural adhesive is controlled to be 50±5 microns.

[0052] The preparation method of the adhesive of IPN structure used in the glue coating machine 13 is as follows: Preparation of linear polyurethane resin prepolymer: uniformly mix diisocyanate-terminated polyurethane prepolymer, polycarbonate diol with a molecular weight of 1000-2000, chain extender, organic tin catalyst, and antioxidant, heat to 65-95° C., and react for 30-45 minutes to obtain linear polyurethane resin prepolymer; Preparation of acrylic resin capable of forming a cross-linked network structure: uniformly mixing accurately measured acrylic resin, cross-linking agent, and polymerization inhibitor to obtain acrylic resin capable of forming a cross-linked network structure; Under nitrogen protection at 40-50°C, add 20-60 parts of an acrylic resin capable of forming a cross-linked network structure to 100 parts of a linear polyurethane resin prepolymer, stir at 60-80 rpm for 15-30 min, mix well, cool to room temperature, and store away from light to obtain an IPN structured adhesive product.

[0053] join Figure 2 and Figure 4The mica slurry batching subsystem 2 includes a phlogopite storage tank 21, a toughening filler storage tank 22, a modified organic silica gel storage tank 23, a preparation kettle 24 connected to the phlogopite storage tank 21, the toughening filler storage tank 22, and the modified organic silica gel storage tank 23, and a grouting pipe group 25 connected to the preparation kettle 24. The phlogopite storage tank 21 is located above the preparation kettle 24, and the phlogopite mica powder in the phlogopite storage tank 21 enters the preparation kettle 24 through a pipeline under gravity transmission. The toughening filler storage tank 22 is located above the preparation kettle 24, and the toughening filler in the toughening filler storage tank 22 enters the preparation kettle 24 through a pipeline under gravity transmission. The modified organic silica gel storage tank 23 is located above the preparation kettle 24, and the modified organic silica gel storage tank 23 is fixedly connected to the preparation kettle 24 through a pipeline, and a solenoid valve and a metering pump are installed on the pipeline, and the modified organic silica gel in the modified organic silica gel storage tank 23 is accurately input into the preparation kettle 24 through the metering pump. The mica slurry prepared in the preparation kettle 24 is poured into the mica paper casting roller group 34 (see Figure 5 ).

[0054] join Figure 2 and Figure 5 The number of mica paper casting subsystems 3 is 3-5, and the prefabricated mica composite board material with a thickness of 8-20 mm can be produced. Taking the production of prefabricated mica composite board material with a standard thickness of 0.8-0.85 mm as an example, the number of mica paper casting subsystems 3 is three. A single mica paper casting subsystem 3 includes a release paper C receiving roller 31, a tension adjustment roller group 32 located downstream of the release paper C receiving roller 31, a transmission roller C33 located downstream of the tension adjustment roller group 32, a mica paper casting roller group 34 located downstream of the transmission roller C33, a preheating roller group 340 located downstream of the mica paper casting roller group 34, an evaporation box 35 located downstream of the preheating roller group 340 and used to evaporate the organic solvent in the mica slurry, an oven B36 located downstream of the evaporation box 35, and a release paper C peeling roller group 37 located downstream of the oven B36. The release paper C stripping roller group 37 includes a transmission roller D371, a release paper C recovery roller 372 and a phlogopite paper guide roller 373. The phlogopite paper with the release paper C is separated from the release paper C at the transmission roller D371. The separated release paper C is stored in the release paper C recovery roller 372. The separated phlogopite paper is transmitted to the phlogopite paper guide roller 373 and input into the phlogopite paper transmission roller group 41 (see Figure 6). After the release paper C peeling roller group 37, the output is phlogopite paper, and the phlogopite paper synchronously output by the three mica paper casting subsystems 3 is input into the prefabricated mica composite board hot pressing subsystem 4, and the prefabricated mica composite board hot pressing subsystem 4 preheats and presses the three phlogopite mica papers into shape and coats them with glue to obtain a prefabricated mica board composite part, and the prefabricated mica board composite part is transferred to the semi-finished special-shaped mica part hot pressing machine 5 for hot pressing to obtain a semi-finished special-shaped mica part, and the semi-finished special-shaped mica part is transferred to the die-cutting machine for die-cutting processing to obtain a self-adhesive special-shaped mica die-cutting finished product.

[0055] join Figure 2 and Figure 5 , the roller temperature of the mica paper casting roller group 34 is 95-98°C. Preferably, the length of the evaporation box 35 is 3-5m, the temperature is 90-120°C, and most of the organic solvent in the mica slurry is removed. Preferably, the length of the evaporation box 35 is 3m, and the temperature is 112°C. The temperature of the oven B36 is 75-80°C, the transmission length of the mica paper in the oven B36 is 30-40m, and the tension is 40-80N. Preferably, the temperature of the oven B36 is 75°C, the transmission length of the mica paper in the oven B36 is 36m, and the tension is 50N.

[0056] join Figure 2 and Figure 6 The prefabricated mica composite board hot pressing subsystem 4 includes a phlogopite paper transmission roller group 41, a first hot pressing composite roller group 42, a second hot pressing roller group 43, a release paper B peeling roller group 44, a glass fiber mesh cloth storage roll 440, a shearing machine 45, and a mica hot pressing machine 46. The phlogopite paper transmission roller group 41 contains a plurality of phlogopite paper transmission rollers, and the number of phlogopite paper transmission rollers is equal to the number of mica paper casting subsystems 3. The phlogopite paper transmission rollers transmit the phlogopite paper output from the mica paper casting subsystem 3 to the first hot pressing composite roller group 42 for preheating and pressing composite.

[0057] join Figure 2 and Figure 6 , the hot pressing temperature of the first hot pressing composite roller group 42 is 100-160°C, and the pressure is 5-10kg. Preferably, the hot pressing temperature of the first hot pressing composite roller group 42 is 125°C. The hot pressing temperature of the second hot pressing roller group 43 is 100-120°C, and the pressure is 10-15kg. Preferably, the hot pressing temperature of the second hot pressing roller group 43 is 105°C. There are two glass fiber mesh cloth storage rolls 440, which are rotatably and fixedly connected to the support rod, which rotates and fixes the first hot pressing composite roller group 42 and the release paper B peeling roller group 44.

[0058] join Figure 2 and Figure 6, the phlogopite paper synchronously outputted by the mica paper casting subsystem 3 is inputted into the first hot pressing compounding roller group 42 through the phlogopite paper transmission roller group 41 for preheating and pressing compounding to obtain a semi-finished prefabricated mica board A. The IPN structural tape outputted by the guide roller group 17 in the IPN structural tape production subsystem 1 is inputted into the release paper B stripping roller group 44 to strip and recycle the release paper B. The IPN structural tape outputted by the release paper B stripping roller group 44 and the semi-finished prefabricated mica board are synchronously inputted into the second hot pressing roller group 43. At the same time, the glass fiber mesh cloth unrolled by the glass fiber mesh cloth storage roll 440 and the semi-finished prefabricated mica board are synchronously inputted into the second hot pressing roller group 43. The IPN structural adhesive with the release paper A is compounded on the upper surface of the semi-finished prefabricated mica board A, and its structure is release paper A / IPN structural adhesive / glass fiber mesh cloth / phlogopite paper / phlogopite mica paper / phlogopite mica paper / glass fiber mesh cloth, which is marked as a semi-finished prefabricated mica board B. The semi-finished prefabricated mica board B outputted by the second hot pressing roller group 43 is cut by the shearing machine 45 to form a semi-finished prefabricated mica board C. The semi-finished prefabricated mica board C is cut and trimmed according to the requirements of the special-shaped structure, and the semi-finished prefabricated mica board C is transferred to the mica hot press 46 to obtain a finished prefabricated mica composite board. Waste is generated during the cutting and trimming of the semi-finished prefabricated mica board C, and this part of the waste can be recycled and reused. The waste is placed in a molding machine and hot molded to obtain a phlogopite mica board.

[0059] The hot pressing parameters of the mica hot press 46 are 5-10MPa, hot pressing at 100-140°C for 10-30s. Preferably, the hot pressing parameters of the mica hot press 46 are 6MPa, hot pressing at 120°C for 15s. The finished prefabricated mica composite board is cut into shape and placed in the semi-finished special-shaped mica hot press 5 for hot pressing to obtain a semi-finished special-shaped mica part. The hot pressing parameters of the semi-finished special-shaped mica hot press 5 are 15-30MPa, hot pressing at 140-160°C for 30-120s. Preferably, the hot pressing parameters of the semi-finished special-shaped mica hot press 5 are 20MPa, hot pressing at 140°C for 100s.

[0060] refer to Figure 1 A method for preparing a self-adhesive special-shaped mica die-cut part comprises the following steps: S1, preparation of mica composite layer: S1.1, firstly, uniformly mix the accurately measured condensation type silicone resin prepolymer and the addition type silicone resin prepolymer to prepare a modified silicone resin; S1.2, uniformly mixing accurately measured modified silicone resin, phlogopite and toughening filler composition to prepare mica slurry; S1.3, the mica slurry in S1.2 is cast-rolled to prepare 0.1-0.4 mm thick phlogopite paper, and the obtained phlogopite paper is cured to obtain the finished phlogopite paper; S1.4, stacking and hot-pressing a plurality of finished phlogopite mica papers to form a prefabricated mica board; S1.4 hot pressing composite process: roller surface temperature 100-160℃, roller pressure 5-10kg; At the same time, an IPN structural tape is prepared, wherein the structure of the IPN structural tape is release paper / IPN structural adhesive / release paper; S2, remove a layer of release paper on the IPN structural tape, and simultaneously hot-press the IPN structural tape adhesive with a layer of release paper and the glass fiber mesh cloth on the surface of the mica composite layer in S1.4, the hot-pressing composite parameters are: roller surface temperature 100-120°C, roller pressure 10-15kg, hot-pressing to obtain a coated mica composite board, the structure of the coated mica composite board is release paper / IPN structural adhesive / glass fiber mesh cloth / prefabricated mica board / glass fiber mesh cloth; S3, cutting and modifying the rubber-coated mica composite board, and hot-molding the obtained rubber-coated mica composite board to obtain a semi-finished special-shaped mica part; S4, die-cutting the semi-finished special-shaped mica piece to obtain a finished self-adhesive special-shaped mica die-cut piece.

[0061] Combined with the integrated production system of self-adhesive special-shaped mica die-cut parts, the operation process of self-adhesive special-shaped mica die-cut parts is explained. The specific production process of self-adhesive special-shaped mica die-cut parts is as follows: The first process: the production process of IPN structure adhesive tape: the configured IPN structure adhesive is poured into the glue coating machine 13 (specifically a fully automatic glue dispensing machine), the release paper A unrolled from the release paper A receiving roller 11 is horizontally transferred to the glue coating machine 13 through the guide roller A111, the guide roller B112, and the transmission roller A113, and the glue coating machine 13 dispenses glue on the upper surface of the release paper A, and after being leveled by the scraper 14, a single-sided composite release paper tape is obtained. The single-sided composite release paper tape The structure is IPN structural adhesive / release paper A, and the adhesive tape of the single-sided composite release paper enters the adhesive tape composite roller group 15 under the transmission of the transmission roller B114. Synchronously, the release paper B unwound by the release paper B receiving roller 12 passes through the guide roller a121, the guide roller b122, and the transmission roller a123 and enters the adhesive tape composite roller group 15, that is, the adhesive tape of the single-sided composite release paper and the release paper B are synchronously transmitted to the adhesive tape composite roller group 15, and the release paper B is composited with the single-sided composite release paper under the hot pressing composite of the adhesive tape composite roller group 15. The upper surface of the double-sided composite release paper tape, the hot pressing composite parameters of the tape composite roller group 15 are as follows: the hot pressing temperature is 80°C, the roller pressure is 20N, and the double-sided composite release paper tape is obtained. The structure of the double-sided composite release paper tape is release paper A / IPN structural adhesive / release paper B. The double-sided composite release paper tape is input into the oven A16 for pre-curing and molding treatment. The double-sided composite release paper tape first enters the front linear transmission drying area of ​​the oven A16, the drying temperature is 80°C, and the transmission speed is 0.5m / min, drying time 5min, after passing through the front linear transmission drying area, it enters the rear serpentine transmission drying area of ​​oven A16, the drying temperature is 60°C, the transmission speed is 0.5m / min, the drying time is 30min, the double-sided composite release paper tape is input to the guide roller group 17 after being heat-dried in the oven A16, and the double-sided composite release paper tape after passing through the guide roller group 17 is input to the release paper B peeling roller group 44 of the prefabricated mica composite board hot pressing subsystem 4; At the same time, the production process of flexible phlogopite paper is as follows: the release paper C unwound by the release paper C storage roller 31 passes through the tension adjustment roller group 32 and the transmission roller C33 in turn, the tension of the release paper C is adjusted to 100N, and the transmission speed is 0.5m / min, the release paper C output by the transmission roller C33 is input between the two mica paper casting rollers of the mica paper casting roller group 34, the diameter of the mica paper casting roller is 0.8m, and the roller temperature of the mica paper casting roller is 96±0.5℃, synchronously, mica slurry is prepared according to the formula in the preparation kettle 24, and the mica slurry in the preparation kettle 24 flows into the mica paper casting roller group 34 cast in the mica paper casting subsystem 3 through the grouting pipe group 25, and the mica casting amount of the grouting pipe group 25 is as much as possible 45g / min, the phlogopite gel layer cast on the release paper C is the semi-finished phlogopite paper A, and the semi-finished phlogopite paper A is input The preheating roller group 340 performs preheating and pressing, and the preheating and pressing parameters are 85°C. After the preheating roller group 340, the semi-finished phlogopite paper B is output. The semi-finished phlogopite paper B is input into the evaporation box 35 to remove the organic solvent in the slurry. The length of the evaporation box 35 is 3m, the temperature is 112°C, and the processing time is 6min. The evaporation box 35 outputs the semi-finished phlogopite paper C. The semi-finished phlogopite paper C is input into the oven B36 for pre-curing and shaping treatment. The drying temperature is 75°C. The transmission length of the semi-finished phlogopite paper C in the oven B36 is 36m, and the tension is 50N. After the oven B36, the semi-finished phlogopite paper D is output. The semi-finished phlogopite paper D passes through the release paper C peeling roller group 37 to obtain the phlogopite paper. The phlogopite paper outputted synchronously by the three mica paper casting subsystems 3 is input into the prefabricated mica composite board hot pressing subsystem 4; Second process: Production process of finished prefabricated mica composite board: The phlogopite paper synchronously outputted by the mica paper casting subsystem 3 is input into the first hot pressing composite roller group 42 through the phlogopite paper transmission roller group 41 for preheating and pressing composite to obtain the semi-finished prefabricated mica board A. The hot pressing parameters are as follows: hot pressing temperature is 125°C and pressure is 8kg; The IPN structural tape outputted from the guide roller group 17 in the IPN structural tape production subsystem 1 is inputted into the release paper B peeling roller group 44 to peel off and recycle the release paper B. The IPN structural tape with the release paper A outputted from the release paper B peeling roller group 44 is synchronously inputted into the second hot pressing roller group 43 together with the semi-finished prefabricated mica board. Simultaneously, the glass fiber mesh cloth unwound from the glass fiber mesh cloth storage roll 440 is synchronously inputted into the second hot pressing roller group 43 together with the semi-finished prefabricated mica board. The composite relationship of the IPN structural adhesive tape with release paper A, the glass fiber mesh cloth, and the semi-finished prefabricated mica board A: the composite structure from top to bottom is IPN structural adhesive with release paper A / glass fiber mesh cloth / semi-finished prefabricated mica board A / glass fiber mesh cloth, and the semi-finished prefabricated mica board B output after hot pressing and compounding by the second hot pressing roller group 43 has a specific structure of release paper A / IPN structural adhesive / glass fiber mesh cloth / phlogopite paper / phlogopite paper / phlogopite paper / glass fiber mesh cloth; The semi-finished prefabricated mica board B output by the second hot pressing roller group 43 is cut by the shearing machine 45 to obtain a semi-finished prefabricated mica board C. The semi-finished prefabricated mica board C is cut and trimmed according to the needs of the special-shaped structure. The semi-finished prefabricated mica board C is transferred to the mica part hot press 46 to obtain a finished prefabricated mica composite board. The hot pressing parameters of the mica part hot press 46 are 6MPa and hot pressing at 120°C for 15s.

[0062] The third process: the production process of semi-finished special-shaped mica parts: the semi-finished special-shaped mica parts are placed in the semi-finished special-shaped mica parts hot press 5 for hot molding to form semi-finished special-shaped mica parts. The hot pressing parameters of the semi-finished special-shaped mica parts hot press 5 are 20MPa and hot pressing at 140°C for 100s.

[0063] The fourth process: the production process of the finished self-adhesive special-shaped mica die-cut parts: the semi-finished special-shaped mica parts are placed in a die-cutting machine for die-cutting to obtain the finished self-adhesive special-shaped mica die-cut parts.

[0064] Specific preparation method of IPN structure adhesive: Preparation of a linear polyurethane resin prepolymer: 50 g of acetone, 0.06 mol of HDI, 0.04 mol of H12MDI, 0.06 mol of 1,6-hexanediol, 0.05 mol of polytetrahydrofuran diol PTFEG (BASF PolyTHF 2000) with a molecular weight of 2000, and 0.004 g of stannous octoate were mixed evenly, heated to 85°C and reacted for 40 min, the temperature was adjusted to 90°C, 0.12 mol of IPDI was added for end-capping reaction for 15 min to obtain an IPDI-terminated polyurethane prepolymer, 0.01 mol of polycarbonate diol (Dacel CD220PL) with a molecular weight of 2000, 0.01 mol of 1,6-hexanediol, 0.006 g of stannous octoate, and 1 g of antioxidant 1010 were mixed evenly, heated to 90°C, reacted for 45 min, and acetone was removed by reduced pressure distillation to obtain a linear polyurethane resin prepolymer; Preparation of an acrylic resin capable of forming a cross-linked network structure: 10 parts of isopropyl methacrylate, 1 part of tripropylene glycol diacrylate, and 0.02 parts of a polymerization inhibitor-hydroquinone are uniformly mixed to obtain an acrylic resin capable of forming a cross-linked network structure; At 45°C and under nitrogen protection, add 40 parts of an acrylic resin that can form a cross-linked network structure to 100 parts of a linear polyurethane resin prepolymer, stir at 80 rpm for 20 minutes, cool to room temperature after mixing evenly, and store away from light to obtain an IPN structured adhesive product.

[0065] When in use, 100 parts of the finished adhesive product with IPN structure and 0.08 parts of the initiator - dibenzoyl peroxide BPO are mixed evenly and added into the glue coating machine for use.

[0066] The specific formula of mica slurry: 80 parts of phlogopite, 2 parts of nano-silicon dioxide, 2 parts of nano-alumina, 1 part of silicon nitride whisker, 5 parts of condensation type silicone resin prepolymer, 10 parts of hydroxyl-terminated silicone oil modified by side chain acrylate (specifically side chain acrylate modified silicone oil IOTA 170), 8 parts of toluene solvent. The condensation type silicone resin prepolymer is prepared by hydrolysis and condensation of γ-aminopropylmethyldiethoxysilane and methylphenyldimethoxysilane. 0.1 mol of γ-aminopropylmethyldiethoxysilane is mixed evenly with 50g of aqueous solution, and 0.1 mol / L sodium hydroxide aqueous solution is added to adjust the pH value to 9.0-9.1. The γ-aminopropylmethyldiethoxysilane is hydrolyzed at 55°C for 30 minutes to obtain silanol mixed solution A; 0.1 mol of methylphenyldimethoxysilane is mixed evenly with 55g of aqueous solution, and 0.11 mol / L sodium hydroxide aqueous solution is added. The solution was adjusted to a pH value of 9.0-9.1, and subjected to alcoholysis reaction at 55°C for 30 minutes to obtain hydrolysis of methylphenyldimethoxysilane to obtain a silanol mixed solution B; the silanol mixed solution B was heated to 40°C in a water bath, and the silanol mixed solution A was added dropwise under magnetic stirring at 100 rpm at a dropping speed of 1.0 mL / min. After the addition was completed, the temperature was maintained at 40°C for 60 minutes, and a 0.1 mol / L dilute hydrochloric acid aqueous solution was added to adjust the pH value to 7. The obtained liquid was dehydrated in a water separator and then subjected to reduced pressure fractionation to remove the hydrolyzed silane monomers that did not participate in the reaction, thereby obtaining a condensation-type silicone resin prepolymer.

[0067] Self-adhesive special-shaped mica die-cut parts are prepared with the above-mentioned specific mica slurry formula. The flame retardant performance of the same batch of self-adhesive special-shaped mica die-cut parts is V0 level, the glue content ranges between 15-15.5wt%, the bending strength ranges between 150-155MPa, and the electrical strength ranges between 27.5-28.5kv / mm. It has good flame retardant performance, insulation safety performance, and bending strength, and meets the thermal runaway safety performance requirements of new energy vehicles.

Claims

1. A self-adhesive special-shaped mica die-cut part, characterized in that: The invention comprises a mica composite layer (100) and a self-adhesive layer (103), wherein the mica composite layer (100) is obtained by hot pressing multiple layers of phlogopite mica paper (101) and glass fiber mesh cloth (102), and the glass fiber mesh cloth (102) is located on the upper and lower surfaces of the mica composite layer (100); the self-adhesive layer (103) is made of an adhesive with an IPN structure; the adhesive with the IPN structure contains a polyurethane resin with a linear structure and an acrylic resin capable of forming a cross-linked network structure; the multiple layers of phlogopite mica paper (101) contain 15-20 wt% of modified organic silica gel, and the modified organic silica gel contains active double bonds.

2. The self-adhesive special-shaped mica die-cut part according to claim 1, characterized in that: The phlogopite paper (101) is prepared from the following raw materials in parts by weight: 15-20 parts of modified organic silicone resin, 70-80 parts of phlogopite, 5-10 parts of toughening filler composition, and 5-10 parts of organic solvent; the toughening filler composition is at least one of nano-silicon dioxide, nano-aluminum oxide, nano-magnesium oxide, aluminum nitride whisker, graphene, and carbon nanotubes; the modified organic silicone resin is composed of a condensation-type silicone resin prepolymer and an addition-type silicone resin prepolymer; and the organic solvent is any one of toluene, xylene, acetone, and DMF.

3. The self-adhesive special-shaped mica die-cut part according to claim 1, characterized in that: The addition type silicone resin prepolymer contains at least hydroxyl-terminated silicone oil modified with side chain acrylate; the mass ratio of the condensation type silicone resin prepolymer to the addition type silicone resin prepolymer is 1:(2-4).

4. The self-adhesive special-shaped mica die-cut part according to claim 1, characterized in that: The acrylic resin capable of forming a cross-linked network structure is made of an acrylic resin, a cross-linking agent, and an inhibitor; the acrylic resin is at least one of methyl acrylate, ethyl acrylate, 2-methyl methacrylate, 2-ethyl methacrylate, methyl methacrylate, ethyl methacrylate, propyl methacrylate, isopropyl methacrylate, and benzyl methacrylate; the cross-linking agent is at least one of trimethylolpropane triacrylate, neopentyl glycol diacrylate, and tripropylene glycol diacrylate.

5. The self-adhesive special-shaped mica die-cut part according to claim 1, characterized in that: The linear polyurethane resin consists of a diisocyanate-terminated polyurethane prepolymer, a polycarbonate diol with a molecular weight of 1000-2000, a chain extender, an organic tin catalyst, and an antioxidant; the R value of the diisocyanate-terminated polyurethane prepolymer is 1.2-1.5; the R value of the linear polyurethane resin is 0.99-1.0; and the chain extender is one of 1,4-butanediol, 1,5-pentanediol, and 1,6-hexanediol.

6. The self-adhesive special-shaped mica die-cut part according to claim 1, characterized in that: The preparation method of the mica composite layer (100) is as follows: Step 1, firstly, uniformly mixing the accurately measured condensation type silicone resin prepolymer and the addition type silicone resin prepolymer to obtain a modified silicone resin; Step 2, uniformly mixing accurately measured modified silicone resin, phlogopite, and toughening filler composition to prepare mica slurry; Step 3, the mica slurry in step 2 is cast by a casting-rolling method to prepare phlogopite mica paper (101) with a thickness of 0.1-0.2 mm, and the obtained phlogopite mica paper (101) is subjected to a aging treatment to obtain a finished phlogopite mica paper; Step three, stacking and compounding a plurality of finished phlogopite mica papers (101) to form a prefabricated mica board, stacking glass fiber mesh cloths (102) on the surfaces of the prefabricated mica boards, and then preheating and pressing to form a mica composite layer (100).

7. The self-adhesive special-shaped mica die-cut part according to claim 6, characterized in that: In step 3, a plurality of finished phlogopite mica papers (101) are stacked and preheated to obtain a semi-finished mica composite board, the roller surface temperature of the preheating and pressing is 100-160° C., and the roller pressure is 5-10 kg; glass fiber mesh cloths (102) are stacked on the surface of the semi-finished mica composite board and then preheated and pressed to obtain a mica composite layer (100), the roller surface temperature of the preheating and pressing is 100-120° C., and the roller pressure is 10-15 kg.

8. The self-adhesive special-shaped mica die-cut part according to claim 6, characterized in that: The method for preparing the self-adhesive special-shaped mica die-cut piece comprises the following steps: S1, preparation of mica composite layer (100); and preparation of IPN structural tape at the same time; S2, removing a layer of release paper on the IPN structural tape, attaching the IPN structural tape adhesive with a layer of release paper to the surface of the mica composite layer (100) in S1, and hot pressing to obtain a coated mica composite board; S3, cutting and modifying the rubber-coated mica composite board, and hot-molding the obtained rubber-coated mica composite board to obtain a semi-finished special-shaped mica part; S4, die-cutting the semi-finished special-shaped mica piece to obtain a finished self-adhesive special-shaped mica die-cut piece.

9. The self-adhesive special-shaped mica die-cut part according to claim 8, characterized in that: The preparation method of the adhesive of the IPN structure in S1 is as follows: Preparation of linear polyurethane resin prepolymer: uniformly mix diisocyanate-terminated polyurethane prepolymer, polycarbonate diol with a molecular weight of 1000-2000, chain extender, organic tin catalyst, and antioxidant, heat to 65-95° C., and react for 30-45 minutes to obtain linear polyurethane resin prepolymer; Preparation of acrylic resin capable of forming a cross-linked network structure: uniformly mixing accurately measured acrylic resin, cross-linking agent, and polymerization inhibitor to obtain acrylic resin capable of forming a cross-linked network structure; Under nitrogen protection at 40-50°C, add 20-60 parts of an acrylic resin capable of forming a cross-linked network structure to 100 parts of a linear polyurethane resin prepolymer, stir at 60-80 rpm for 15-30 min, mix well, cool to room temperature, and store away from light to obtain an IPN structured adhesive product.

10. An integrated production system for the self-adhesive special-shaped mica die-cut parts according to any one of claims 1 to 9, characterized in that: The invention comprises an IPN structural adhesive tape production subsystem (1), a plurality of mica slurry batching subsystems (2), a plurality of mica paper casting subsystems (3), a prefabricated mica composite board hot pressing subsystem (4) and a semi-finished special-shaped mica piece hot pressing subsystem (5). The mica slurry outputted from the mica slurry batching subsystem (2) is casted by the mica paper casting subsystem (3) to form phlogopite paper with release paper; the phlogopite paper outputted from the mica paper casting subsystem (3) is synchronously moved with the glass fiber mesh cloth and the IPN structural adhesive tape to the prefabricated mica composite board hot pressing subsystem (4) for pre-heating and pressing to obtain a prefabricated mica composite board; the obtained prefabricated mica composite board is inputted into a special-shaped mica piece hot pressing machine (5) for hot pressing and forming to obtain a semi-finished special-shaped mica piece; the semi-finished special-shaped mica piece is transferred to a die-cutting machine for die-cutting to obtain a self-adhesive special-shaped mica die-cutting finished product.

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