Method for manufacturing laminate

Abstract

The present application relates to a method for manufacturing a laminate, at least comprising: an adjustment step of providing a plurality of angle adjustment rollers, and adjusting, by means of the angle adjustment rollers, a coating angle at which each sheet, which includes a release material film, a liquid crystal polymer film, and a metal foil, is coated on a pair of pressing rollers before the sheets are thermocompression-bonded by the pair of pressing rollers; a heat treatment step of releasing the sheets from the corresponding unwinding rollers, and laminating the sheets to form a laminated material when the sheets pass through a pair of pressing rollers according to a preset sequence, and performing hot pressing bonding on the sheets through the pressing rollers after the sheets are subjected to preheating treatment before lamination; and a rolling step of separating the laminated material after the thermocompression bonding, and peeling off the release material film to obtain a laminated body formed by compounding the liquid crystal polymer film and the metal foil. Compared with the prior art, material deformation and the like caused by rapid temperature rise before and after each layer of material enters the pressing roller for hot pressing can be prevented.

Description

Technical Field

[0001] The present application relates to the field of polymer films, and in particular to a method for manufacturing a laminate. Background Art

[0002] Liquid crystal polymer (LCP) materials are widely used in the electronics field due to their unique properties, such as high temperature resistance, high-strength mechanical properties, superior electrical properties and processing properties. They are also one of the preferred materials in the 5G communication field.

[0003] At present, the main methods for preparing LCP films include film blowing, casting and coating. Among them, the coating method requires the use of an appropriate solvent to dissolve the LCP in order to achieve coating film formation, which is limited in thickness and electrical properties. The film blowing method is a relatively successful technical solution for commercialization. By adjusting the blowing ratio, the mechanical direction (MD) and the perpendicular mechanical direction (TD) of the LCP film are well balanced in physical properties. However, the LCP primary film prepared by the film blowing method has poor surface wear resistance (easy friction stratification), obvious micro-layered structure (easy to separate the skin and core, thus affecting the bonding strength with the copper foil), low elongation at break, insufficient initial heat resistance and other problems, which limit its use. The existing technology combines the LCP primary film with the metal foil, relies on the metal foil as a support carrier, and improves the physical properties of the LCP film by continuing high-temperature heat treatment. Specifically, for example, Patent Document 1 (International Publication No. 2011 / 093427) discloses a method for manufacturing a single-sided laminate, wherein an insulating film (A), a metal foil (B), and a separator (C) are overlapped and thermocompressed in the order of (r1) / (B) / (A) / (C) / (A) / (B) / (r2) between a pair of pressurized hot rollers (r1, r2), and then peeled off from the separator (C) to obtain two single-sided laminates. Patent document 2 (Japanese Patent Publication No. 2014-128913) discloses a method for manufacturing a double-sided laminate, that is, a method for manufacturing a double-sided laminate with metal foil (B, B') bonded to both sides of an insulating film (A), wherein an insulating film (A), a metal foil (B, B') and a separator (C) are overlapped and heat-pressed in the order of (r1) / (B) / (A) / (B') / (C) / (B') / (A) / (B) / (r2) between a pair of pressurized hot rollers (r1, r2), and then the double-sided laminate is separated or peeled off from the separator (C) to obtain two double-sided metal-coated laminates. Patent document 3 (CN112714691B) discloses a method for manufacturing a laminate, which solves the technical problem in the first two technologies that the separator absorbs water and easily causes bubbles, wrinkles and other defects during the lamination process, and proposes a technical solution of placing the separator on the side of the pressure roller and preheating it.

[0004] However, the above solutions cannot fully solve the problem of material deformation caused by the rapid increase in temperature of each layer of material before and after entering the hot pressing roller during the lamination process. Therefore, it may still be impossible to effectively avoid the wrinkle problem during the actual operation. In addition, in the above solution, since the insulating film and metal foil are directly fed into the hot pressing roller, it is easy to produce slight wave deformation near the pressing roller, which leads to wrinkles and stripe defects during the lamination process.

[0005] Therefore, how to provide a method for manufacturing a laminate to solve the technical problem of how to prevent the material layers from deforming due to the rapid increase in temperature before and after entering the hot pressing rollers is a technical problem that needs to be solved urgently in this application. Summary of the invention

[0006] The purpose of the present application is to provide a method for manufacturing a laminate, which can solve the technical problem of how to prevent the deformation of the materials of each layer due to the rapid increase in temperature before and after entering the hot pressing roller.

[0007] In order to achieve the above object, the present application proposes a method for manufacturing a laminate, which comprises: A plurality of angle adjustment rollers are provided, and a step of adjusting the angle of each sheet constituting the laminate by each angle adjustment roller before the sheet is heat-pressed and bonded by a pair of pressing rollers, wherein the sheet comprises: a liquid crystal polymer film, a metal foil and a release material film; A heat treatment process in which the liquid crystal polymer film, the metal foil, and the release material film are released from the corresponding unwinding rollers and then pass through a pair of lamination rollers in a preset order to form a laminated material, wherein each sheet is preheated before lamination and then passes through the lamination rollers for the heat-compression bonding; The laminated material after the thermocompression bonding is subjected to a separation process, and after the release material film is peeled off, a winding step is performed to obtain the laminated body composed of the liquid crystal polymer film and the metal foil.

[0008] Further preferably, the angle adjustment roller comprises: a first angle adjustment roller for adjusting the liquid crystal polymer film, a second angle adjustment roller for adjusting the metal foil, and a third angle adjustment roller for adjusting the release material film; Wherein, each angle adjustment roller is respectively arranged between the corresponding unwinding roller and the pressing roller.

[0009] Further preferably, the first angle adjustment roller and the second angle adjustment roller are a common adjustment roller. Alternatively, the first angle adjusting roller and the second angle adjusting roller are two independent adjusting rollers.

[0010] Further preferably, there are more than two first angle adjustment rollers; Further preferably, there are more than two second angle adjustment rollers; Further preferably, there are two or more third angle adjustment rollers.

[0011] Further preferably, the wrapping angles of the release material film, the liquid crystal polymer film, and the metal foil decrease in sequence from the side contacting the same lamination roller to the side away from the same lamination roller; The wrapping angle of the release material film is inversely proportional to the thickness of the release material film; And / or, the wrapping angle of the release material film is 30°~180°.

[0012] Further preferably, the thickness of the release material film is 25-125 mm.

[0013] Further preferably, the thickness of the release material film is 25-75 mm.

[0014] Further preferably, the thickness of the release material film is 25-50 mm.

[0015] Further preferably, the release material film or metal foil used to coat the liquid crystal polymer film is an isolation film, and the liquid crystal polymer film is in contact with the lamination roller through the isolation film, wherein the coating angle of the isolation film is greater than or equal to 15°; Further preferably, when the lamination roller that contacts the isolation film and performs the preheating treatment is a metal roller, the angle difference between the coating angles of the isolation film and the liquid crystal polymer film is 0° to 130°.

[0016] Further preferably, the angle difference is proportional to the thickness of the isolation film.

[0017] Further preferably, when the first angle adjustment roller and the second angle adjustment roller are two independent adjustment rollers, if the pressing roller that contacts the isolation film and performs the preheat treatment is a metal roller, the angle difference between the coating angles of the isolation film and the liquid crystal polymer film is 15°~60°; if the pressing roller that contacts the isolation film and performs the preheat treatment is a metal roller with a non-metallic layer on the outside, the angle difference between the coating angles of the isolation film and the liquid crystal polymer film is 5°~60°.

[0018] Further preferably, when the first angle adjustment roller and the second angle adjustment roller are two independent adjustment rollers, if the pressing roller that contacts the isolation film and performs the preheat treatment is a metal roller, and the isolation film and the liquid crystal polymer film are coated with the same pressing roller, the angle difference between the coating angles is 15°~60°; if the pressing roller that contacts the isolation film and performs the preheat treatment is a metal roller with a non-metallic layer on the outside, and the isolation film and the liquid crystal polymer film are coated with the same pressing roller, the angle difference between the coating angles is 5°~60°.

[0019] Further preferably, the coating angle of the liquid crystal polymer film is 30° to 90°; Further preferably, the wrapping angle of the metal foil is 30° to 90°; Further preferably, the wrapping angle of the release material film is 30°~120°.

[0020] Further preferably, when the first angle adjustment roller and the second angle adjustment roller are a common adjustment roller, if the pressing roller that contacts the isolation film and performs the preheat treatment is a metal roller, the angle difference between the coating angles of the isolation film and the liquid crystal polymer film is 0°~60°, or, if the pressing roller that contacts the isolation film and performs the preheat treatment is a metal roller with a non-metallic layer on the outside, the angle difference between the coating angles of the isolation film and the liquid crystal polymer film is 0°~60°.

[0021] Further preferably, in the heat treatment process, the time for the liquid crystal polymer film to be preheated by the lamination roller is 1s to 60s; And / or, the time for the metal foil to undergo the preheating treatment by passing through the lamination roller is 1 s to 60 s.

[0022] Further preferably, in the heat treatment step, in the heat treatment step, the roller surface temperature of the pair of pressing rollers, the roller surface temperature of the pressing roller with a relatively high roller surface temperature is (T m -50℃)~(T m +30℃), where the T m is the melting point temperature of the raw material of the liquid crystal polymer film.

[0023] Further preferably, in the heat treatment step, the hot pressing pressure formed by the lamination material by the lamination roller is 1 t / m to 10 t / m.

[0024] Further preferably, in the heat treatment step, the hot pressing pressure formed by the lamination roller on the laminated material is 2 t / m to 7 t / m; And / or, the tension of the unwinding roller is 20-500 N / m; And / or, the diameter of the lamination roller is 240-600 mm.

[0025] Further preferably, in the winding process, it includes: a winding roller for respectively winding up the liquid crystal polymer film, the metal foil and the release material film and applying a preset tension; And / or, a heating plate is provided between the angle adjustment roller and the pressing roller for preheating the metal foil.

[0026] Further preferably, during the winding process, the rate at which the laminated material flows through a pair of lamination rollers is 0.1-5 m / min.

[0027] Further preferably, during the winding process, the rate at which the laminated material flows through a pair of lamination rollers is 0.5-2 m / min.

[0028] Further preferably, during the winding process, the stacked material flows through a pair of lamination rollers at a rate of 0.5-1.5 m / min.

[0029] Further preferably, during the winding process, the rate at which the laminated material flows through a pair of lamination rollers is 1-1.5 m / min.

[0030] Further preferably, the preheating time is 1 to 60 seconds.

[0031] Further preferably, the thickness of the release material film is 10-200μm to prevent a too thin film from being detrimental to heat insulation and unable to provide effective high-temperature buffering effect, and a too thick film from significantly reducing the heat transfer efficiency, making it impossible to reach the expected temperature at the crimping position, and it is impossible to balance the reduced heat transfer efficiency caused by the increase in the thickness of the release material film simply by increasing the temperature of the hot pressing roller.

[0032] Further preferably, the release material film has a thickness of 25-150 μm.

[0033] Further preferably, the material of the metal foil is any one of copper, iron, nickel and aluminum; Alternatively, the metal foil is made of alloy metal.

[0034] Further preferably, the release material film is made of any one of polyimide film, polyetheretherketone film, polyphthalamide film, polyetherimide film, and metal foil; And / or, the material of the metal foil is a composite film, wherein the composite film is a combination of any two or more of a fluorine-containing film, a polyimide film, a non-woven fabric, a glass fiber fabric, and a metal foil.

[0035] Further preferably, the laminate is a single-sided metal-clad composite body or a double-sided metal-clad composite body.

[0036] Further preferably, at least one of the pair of lamination rollers is a metal roller.

[0037] Further preferably, the pair of lamination rollers comprises: a metal roller, and another metal roller combined with the metal roller and provided with a non-metallic layer on the outside.

[0038] Further preferably, the material of the non-metallic layer is any one of silicone rubber, polyimide material and its modified material, polyetheretherketone film material, or aramid material or a combination thereof.

[0039] Further preferably, the stacked materials are arranged and hot pressed in any order of (a) to (d); (a) R / F / M; (b) R / F / M / R; (c) R / F / M / M / F / R; (d) R / M / F / M / R.

[0040] Further preferably, the heat treatment process further includes: performing a preheating treatment by providing a preheating component before the sheet contacts the lamination roller.

[0041] Further preferably, the preheating component is a heating plate (t1) disposed between the angle adjustment roller and the lamination roller, or an angle adjustment roller having a preheating function; and / or, the distance between the preheating assembly and the pressing roller for contacting the release material film (R) is less than or equal to 50 mm; And / or, the preheating temperature of the preheating component is controlled below 150°C.

[0042] Further preferably, the distance between the preheating assembly and a pressing roller for contacting the release material film (R) is less than or equal to 20 mm.

[0043] Further preferably, the sheet material for the preheating treatment is one of the release material films, such as a metal composite foil, so as to avoid the metal composite foil from being loosened and deformed by contacting a high-temperature metal roller without low-temperature preheating treatment.

[0044] Further preferably, when there are two metal foils, they are respectively coated with corresponding lamination rollers to be preheated before lamination; Alternatively, when there are two liquid crystal polymer films, they are respectively coated with corresponding lamination rollers to be preheated before lamination; Alternatively, when there are two release material films, they are respectively covered with corresponding laminating rollers to be preheated before lamination.

[0045] Compared with the prior art, the present application can prevent the material layers from deforming due to the rapid increase in temperature before and after entering the hot pressing rollers, and optimize the process parameters, improve production efficiency and reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 is a schematic diagram of a method for manufacturing a laminate in Example 1 of the present application; Figure 2 is a schematic diagram of a method for manufacturing a laminate in Example 3 of the present application; Figure 3 is a schematic diagram of a method for manufacturing a laminate in Example 4 of the present application; Figure 4 is a schematic diagram of a method for manufacturing a laminate in Example 5 of the present application; Figure 5 is a schematic diagram of a method for manufacturing a laminate in Example 6 of the present application; Figure 6 is a schematic diagram of a method for manufacturing a laminate in Example 7 of the present application; Figure 7 is a schematic diagram of a method for manufacturing a laminate in Example 9 of the present application; Figure 8 is a schematic diagram of a method for manufacturing a laminate in Example 10 of the present application; Fig. 9 is a schematic diagram of a method for manufacturing a laminate in Example 14 of the present application; Fig.10 The state of the coating angle when the laminated material of the present application is coated with the lamination roller is shown in FIG. Figure 1 ; Fig.11 The state of the coating angle when the laminated material of the present application is coated with the lamination roller is shown in FIG. Figure 2 ; Fig.12 This is a schematic diagram of wrinkles appearing on the film surface of the laminate in Comparative Example 1 of the present application; Fig.13 This is a schematic diagram of bubbles appearing on the film surface of the laminate in Comparative Example 3 of the present application.

[0047] Figure symbols: release material film R, liquid crystal polymer film F, metal foil M, metal composite foil R1, unwinding roller 1, unwinding roller 2, unwinding roller 3, unwinding roller 1', unwinding roller 2', unwinding roller 3', angle adjustment roller 4, angle adjustment roller 4', angle adjustment roller 5, angle adjustment roller 5', angle adjustment roller 6, angle adjustment roller 6', release roller 7, release roller 7', release roller 8, release roller 8', heating plate t1. DETAILED DESCRIPTION

[0048] The following is a more detailed description of the preparation method of the liquid crystal polymer film of the present application in conjunction with the schematic diagram, wherein the preferred embodiment of the present application is shown, and it should be understood that those skilled in the art can modify the present application described herein, while still achieving the beneficial effects of the present application. Therefore, the following description should be understood as being widely known to those skilled in the art, and not as a limitation to the present application.

[0049] In some embodiments of the present invention, the method for manufacturing the above-mentioned laminate comprises the following steps: Step 1: Set up a plurality of angle adjustment rollers, and use the angle adjustment rollers to adjust the angles of each sheet before being hot-pressed and bonded by a pair of pressing rollers, such as Figure 1 The process of adjusting the wrapping angle of the wrapping laminating roller shown, wherein the sheet material includes: a release material film R, a liquid crystal polymer film F, and a metal foil M; Step 2: After each sheet is released from the corresponding unwinding roller, it passes through a pair of pressing rollers in a preset order to form a heat treatment process for stacking the laminated material, wherein each sheet is preheated before being stacked and then passed through the pressing rollers for heat-compression bonding; Step 3: Separating the laminated materials after the thermal compression bonding, and after peeling off the release material film R, a winding process is performed to obtain a laminated body composed of the liquid crystal polymer film F and the metal foil M.

[0050] It should be noted that, in this embodiment, step one can also be arranged after step two or step three, so as to adjust the coating angle in real time according to actual process requirements, and no specific limitation or elaboration will be made here.

[0051] In addition, it is worth mentioning that the release material film R, liquid crystal polymer film F, and metal foil M can all cover the same lamination roller, or they can cover different lamination rollers, for example, one part covers the lamination roller r1 in a clockwise direction, and the other part covers the lamination roller r2 in a counterclockwise direction.

[0052] Furthermore, as a preferred method, when the number of release material films R, liquid crystal polymer films F or metal foils M is two, they are respectively coated with different lamination rollers, and the coating angles can be the same degree or different degrees. In the following embodiments, only the coating angles of the same angle are briefly described as an example.

[0053] In addition, it should be noted that in the above adjustment process, Fig.10 and Fig.11 As shown, the angle adjustment roller is used to adjust the wrapping angle θ of the release material film R. r The angle adjustment roller is used to adjust the coating angle θ of the liquid crystal polymer film F. f The angle adjustment roller is used to adjust the wrapping angle θ of the metal foil M. m In addition, r1 / R / F / M / r2 in the whole text are abbreviations for release material film, liquid crystal polymer film, metal foil and lamination roller, respectively.

[0054] In addition, it is worth mentioning that Fig.10 As shown, the release material film R in this embodiment can be located on different lamination rollers with the liquid crystal polymer film F and the metal foil M, or can be located on different lamination rollers as shown in FIG. Fig.11 As shown, they are located on the same lamination roller, and no specific limitation or detailed description will be given here.

[0055] The following is specifically described in conjunction with specific embodiments: Example 1 This embodiment provides a method for manufacturing a laminate, which includes: Provide multiple angle adjustment rollers (e.g. Figure 1 The angle adjustment rollers 4, 5, and 6 are shown, and the angle adjustment rollers are used to adjust the angles of the sheets before the sheets are heat-pressed and bonded by a pair of bonding rollers, wherein the sheets include: a release material film R, a liquid crystal polymer film F, and a metal foil M; Make each sheet from Figure 1 After the unwinding rollers 1, 2, and 3 are released in sequence, the unwinding rollers 1, 2, and 3 are released in sequence. Figure 1 When the order of r1 / R / F / M / r2 shown in the figure passes through a pair of lamination rollers (r1, r2), the laminated materials are laminated to form a heat treatment process, wherein each sheet is preheated by wrapping the lamination roller r1 with a release material film R, and the lamination roller r2 with a liquid crystal polymer film F and a metal foil M before lamination, and then the sheets are heat-pressed and bonded by lamination rollers; The laminated material after heat-compression bonding is separated between R / F, and after peeling off the release material film R, a winding process is performed to obtain a single-sided laminate composed of a liquid crystal polymer film F and a metal foil M. The laminated material after heat-compression bonding is separated from the release material film R by release rollers 7 and 8, and then wound up by a winding roller 9 to obtain a laminate.

[0056] Furthermore, in the above adjustment process, the melting point of the liquid crystal polymer film F is 310°C and the thickness is 50 microns, the material of the release material film R is polyimide and the thickness is 75 μm, the metal foil M is aluminum foil and the thickness of the metal foil M is 75 μm. The release material film R covers the laminating roller r1 at a covering angle of 90°, the liquid crystal polymer film F covers the laminating roller r2 at a covering angle of 30°, and the metal foil M covers the laminating roller r2 at a covering angle of 160°. The laminating roller r1 is a metal roller. The laminating roller r2 is a metal roller with a surface covered with high temperature resistant silicone rubber.

[0057] In the heat treatment step, the surface temperature of the lamination roll r1 was 280° C., and the surface temperature of the lamination roll r2 was 150° C. When each sheet passed through the lamination roll, it was thermocompressed at a speed of 0.5 m / min, and the pressure of the lamination roll was set to 3 t / m.

[0058] Example 2 This embodiment provides a method for manufacturing a laminate, which is substantially the same as Embodiment 1, except that in this embodiment, the liquid crystal polymer film F wraps around the laminating roller r2 at an angle of 90°, and the release material film R wraps around the laminating roller r1 at an angle of 160°.

[0059] Example 3 This embodiment provides a method for manufacturing a laminate. This embodiment is substantially the same as Embodiment 1, except that each sheet material is as follows. Figure 2 The order of r1 / R / F / M / r2 shown in the figure passes through a pair of lamination rollers to form a heat treatment process for the laminated material, wherein each sheet is preheated before lamination by wrapping the release material film R, liquid crystal polymer film F, and metal foil M around the lamination roller r2.

[0060] In this embodiment, the thickness of the release material film R is 25 μm. The release material film R covers the laminating roller r2 at an angle of 30°, the liquid crystal polymer film F covers the laminating roller r2 at an angle of 90°, and the metal foil M covers the laminating roller r2 at an angle of 160°.

[0061] Example 4 This embodiment provides a method for manufacturing a laminated body. This embodiment is substantially the same as Embodiment 2, except that: Figure 3As shown, in the adjustment process of this embodiment, the sheet material includes: a metal composite foil R1 composed of aluminum foil coated with an epoxy silicone coating on the surface, a liquid crystal polymer film F, and a metal foil M, wherein the metal composite foil R1 is used as one of the release material films R to replace the release material film prepared by polyimide. In addition, the epoxy silicone coating in this embodiment can also be replaced by other coatings with release function, which will not be specifically limited or repeated here.

[0062] Furthermore, in the heat treatment process, each sheet is Figure 3 The unwinding rollers 1, 2, and 3 shown are released in sequence and pass through a pair of lamination rollers in the order of r1 / R1 / F / M / r2 to form a heat treatment process for the laminated materials, wherein each sheet is preheated before lamination by wrapping the metal composite foil R1, the liquid crystal polymer film F, and the metal foil M around the lamination roller r2.

[0063] Furthermore, the metal composite foil R1 wrapped around the laminating roller r2 at an angle of 30°, the liquid crystal polymer film F wrapped around the laminating roller r2 at an angle of 90°, and the metal foil M wrapped around the laminating roller r2 at an angle of 160°. The thickness of the metal composite foil R1 is 50 μm.

[0064] Example 5 This embodiment provides a method for manufacturing a laminate, which includes: Provide multiple angle adjustment rollers (e.g. Figure 4 The angle adjustment rollers 5, 6, 5', 6' are shown, and the angle adjustment rollers are used to adjust the angles of the sheets before they are heat-pressed and bonded by a pair of bonding rollers, wherein the sheets include two release material films R, a liquid crystal polymer film F, and a metal foil M; Make each sheet as Figure 4 The unwinding roller 1, unwinding roller 2, unwinding roller 2', and unwinding roller 1' are released in sequence, and then pass through a pair of laminating rollers in the order of r1 / R / F / M / R / r2 to form a heat treatment process of laminated materials, wherein each sheet is preheated by wrapping a release material film R and a liquid crystal polymer film F around the laminating roller r1, and a metal foil M and another release material film R around the laminating roller r2 before laminating, and then heat-pressed and bonded by laminating rollers; The laminated material after the heat-compression bonding is separated between R / F and M / R, and after the two release material films R are peeled off, a winding process is performed to obtain a single-sided metal-coated laminated body composed of a liquid crystal polymer film F and a metal foil M. The laminated material after the heat-compression bonding is separated from the release material film R by a pair of release rollers (release roller 7, release roller 7') and a pair of release rollers (release roller 8, release roller 8'), and then wound up by a winding roller 9 to obtain a laminated body.

[0065] Furthermore, in the above adjustment process, the melting point of the liquid crystal polymer film F is 310°C, the thickness is 50 microns, the material of the release material film R is polyimide, the thickness is 75μm, the metal foil M is aluminum foil, and the thickness of the metal foil M is 50μm. The release material film R covers the laminating roller r1 at an angle of 160°, the liquid crystal polymer film F covers the laminating roller r1 at an angle of 60°, the metal foil M covers the laminating roller r2 at an angle of 60°, and the release material film R covers the laminating roller r2 at an angle of 160°. Both the laminating roller r1 and the laminating roller r2 are metal rollers.

[0066] In the heat treatment step, the surface temperature of the laminating roller r1 was 280° C., and the surface temperature of the laminating roller r2 was 280° C. When each sheet passed through the laminating roller, it was thermocompressed at a speed of 0.5 m / min, and the pressure of the laminating roller during the thermocompression bonding was set to 3 t / m.

[0067] In addition, it should be noted that, in the above adjustment process, the angle adjustment roller 5 is used to adjust the coating angle of the liquid crystal polymer film F, the angle adjustment roller 6 is used to adjust the coating angle of the release material film R, and the angle adjustment roller 5' is used to adjust the coating angle of the metal foil M. The angle adjustment roller 6' is used to adjust the coating angle of another release material film R. The two release material films R are used to coat different lamination rollers respectively.

[0068] Example 6 This embodiment provides a method for manufacturing a laminated body. This embodiment is substantially the same as Embodiment 5, except that: Figure 5 As shown, the angle adjustment roller 6' is a heating roller with a preheating function to preheat the release material film R. The film body guided by the angle adjustment roller 6' is a metal composite foil R1 composed of an aluminum foil coated with an epoxy silicone coating.

[0069] Furthermore, the surface of the heating roller is 150° C. Furthermore, the length of the region of the release material film R flowing between the angle adjustment roller 6 ′ and the pressing roller r1 is 50 mm.

[0070] In detail, Figure 5As shown, the sheet material includes: a release material film R, a liquid crystal polymer film F, and a metal foil M, a metal composite foil R1 composed of an aluminum foil coated with epoxy silicone coating, and an angle adjustment roller 6' is used to adjust the coating angle of the metal composite foil R1.

[0071] And, make each sheet as Figure 5 The unwinding roller 1, unwinding roller 2, unwinding roller 2', and unwinding roller 1' after being released, are stacked and then pass through a pair of laminating rollers in the order of r1 / R / F / M / R1 / r2 to form a heat treatment process of the laminated materials, wherein each sheet is preheated by covering the laminating roller r1 with a release material film R and a liquid crystal polymer film F, and the laminating roller r2 with a metal foil M and a metal composite foil R1 before being stacked, and then hot-pressed and bonded by laminating rollers; The laminated material after the heat-pressing bonding is separated between R / F and M / R1, and after the release material film R and the metal composite foil R1 are peeled off, a winding process is performed to obtain a single-sided metal-coated laminated body composed of a liquid crystal polymer film F and a metal foil M. The laminated material after the heat-pressing bonding is separated from the release material film R by a pair of release rollers (release roller 7, release roller 7') and a pair of release rollers (release roller 8, release roller 8'), and then wound up by a winding roller 9 to obtain a laminated body.

[0072] Example 7 This embodiment provides a method for manufacturing a laminate, which includes: Provide multiple angle adjustment rollers (e.g. Figure 6 The angle adjustment rollers 4, 5, 6, 4', 5' and 6' are shown, and the angle adjustment rollers are used to adjust the angles of the sheets before the sheets are heat-pressed and bonded by a pair of bonding rollers, wherein the sheets include two release material films R, two liquid crystal polymer films F and two metal foils M; Make each sheet as Figure 6 The unwinding roller 1, unwinding roller 2, unwinding roller 3, unwinding roller 3', unwinding roller 2', and unwinding roller 1' are shown as being released, and then pass through a pair of laminating rollers in the order of r1 / R / F / M / M / F / R / r2 to form a heat treatment process for laminating materials, wherein each sheet is preheated before laminating by coating the laminating roller r1 with a release material film R, a liquid crystal polymer film F, and a metal foil M, and coating the laminating roller r2 with another metal foil M, a liquid crystal polymer film F, and a release material film R, and then hot-pressed and bonded by laminating rollers; The laminated material after heat-compression bonding is separated between R / F, M / M, and F / R, and after peeling off the two release material films R, two independent single-sided metal-coated laminated bodies composed of a liquid crystal polymer film F and a metal foil M are obtained in a winding process. The laminated material after heat-compression bonding is separated from the release material film R by a pair of release rollers (release roller 7, release roller 7') and a pair of release rollers (release roller 8, release roller 8'), and then wound up by a winding roller 9 to obtain a laminated body.

[0073] Furthermore, in the above adjustment process, the melting point of the liquid crystal polymer film F is 310°C, the thickness is 50 microns, the material of the release material film R is polyimide, the thickness is 125μm, the metal foil M is aluminum foil, and the thickness of the metal foil M is 125μm; the wrapping angle of the release material film R covering the laminating roller r2 is 160°, the wrapping angle of the release material film R covering the laminating roller r1 is 160°, the wrapping angle of the liquid crystal polymer film F covering the laminating roller r1 is 60°, the wrapping angle of the metal foil M covering the laminating roller r1 is 45°, the wrapping angle of the liquid crystal polymer film F covering the laminating roller r2 is 60°, and the wrapping angle of the metal foil M covering the laminating roller r2 is 45°. Furthermore, the laminating roller r1 and the laminating roller r2 are both metal rollers.

[0074] In the heat treatment step, the surface temperature of the laminating roller r1 was 280° C., and the surface temperature of the laminating roller r2 was 280° C. When each sheet passed through the laminating roller, it was thermocompressed at a speed of 0.5 m / min, and the pressure of the laminating roller during the thermocompression bonding was set to 3 t / m.

[0075] In addition, it should be noted that, in the above adjustment process, the angle adjustment roller 6 is used to adjust the wrapping angle of the release material film R, the angle adjustment roller 5 is used to adjust the wrapping angle of the metal foil M, and the angle adjustment roller 4 is used to adjust the wrapping angle of the liquid crystal polymer film F. The angle adjustment roller 4' is used to adjust the wrapping angle of another metal foil M. The angle adjustment roller 5' is used to adjust the wrapping angle of another liquid crystal polymer film F. The angle adjustment roller 6' is used to adjust the wrapping angle of another release material film R.

[0076] Example 8 This embodiment provides a method for manufacturing a laminate, which is substantially the same as Embodiment 7, except that the metal foil M in this embodiment is a copper foil, and the thickness of the release material film R is 75 μm.

[0077] Furthermore, in the heat treatment step of the present embodiment, the surface temperature of the pressing roller r1 was 305° C. When the sheets were thermocompressed, the pressure of the pressing roller was set to 5 t / m.

[0078] Example 9 This embodiment provides a method for manufacturing a laminate, which includes: Provide multiple angle adjustment rollers (e.g. Figure 7 The angle adjustment rollers 4, 5, 6, 4', 6' shown in the figure, and the angle adjustment rollers are used to adjust the angles of the sheets before they are heat-pressed and bonded by a pair of bonding rollers, wherein the sheets include two release material films R, a liquid crystal polymer film F, and two metal foils M; Make each sheet as Figure 7 The unwinding rollers 1, 2, 3, 3', and 1' shown in the figure, after being released, pass through a pair of lamination rollers in the order of r1 / R / M / F / M / R / r2, and undergo a heat treatment process for lamination materials, wherein before lamination, each sheet is preheated by wrapping a release material film R, a metal foil M, and a liquid crystal polymer film F around the lamination roller r1, and another metal foil M and another release material film R around the lamination roller r2, and then are hot-pressed and bonded by lamination rollers. The laminated material after the heat-compression bonding is separated between R / M and M / R, and after the two release material films R are peeled off, a winding process is performed to obtain a double-sided metal-coated laminate composed of a liquid crystal polymer film F and two metal foils M. The laminated material after the heat-compression bonding passes through a pair of release rollers 7 and a pair of release rollers 8 to separate the release material film R, and then is wound up by a winding roller 9 to obtain a laminated body.

[0079] Furthermore, in the above adjustment process, the melting point of the liquid crystal polymer film F is 310°C, the thickness is 50 microns, the material of the release material film R is polyimide, the thickness is 75μm, the metal foil M is copper foil, and the thickness of the metal foil M is 75μm; the wrapping angle of the release material film R covering the laminating roller r1 is 160°, the wrapping angle of the metal foil M covering the laminating roller r1 is 60°, the wrapping angle of the liquid crystal polymer film F covering the laminating roller r1 is 45°, the wrapping angle of the metal foil M covering the laminating roller r2 is 60°, and the wrapping angle of the release material film R covering the laminating roller r2 is 160°. Both the laminating roller r1 and the laminating roller r2 are metal rollers.

[0080] In the heat treatment step, the surface temperature of the lamination roll r1 was 305° C., and the surface temperature of the lamination roll r2 was 280° C. When each sheet passed through the lamination roll, it was thermocompressed at a speed of 0.5 m / min, and the pressure of the lamination roll was set to 5 t / m.

[0081] In addition, it should be noted that, in the above adjustment process, the angle adjustment roller 6 is used to adjust the wrapping angle of the release material film R, the angle adjustment roller 5 is used to adjust the wrapping angle of the metal foil M, and the angle adjustment roller 4 is used to adjust the wrapping angle of the liquid crystal polymer film F. The angle adjustment roller 4 is used to adjust the wrapping angle of another metal foil M. The angle adjustment roller 6 is used to adjust the wrapping angle of another release material film R.

[0082] Example 10 This embodiment provides a method for manufacturing a laminate, which includes: Provide multiple angle adjustment rollers (e.g. Figure 8 Angle adjustment rollers 4, 5, and 6 are shown, and the angle adjustment rollers are used to adjust the angles of the wrapping rollers of each sheet before the sheets are heat-pressed and bonded by a pair of pressing rollers; Make each sheet as Figure 8 After the unwinding rollers 1, 2, and 3 are released, the materials are laminated and heat treated by passing through a pair of laminating rollers in the order of r1 / R / F / M / r2; The laminated material after thermocompression bonding is separated between R / F, and after the release material film R is peeled off, a single-sided metal-clad laminated body composed of a composite of a liquid crystal polymer film F and a metal foil M is obtained in a winding step.

[0083] Furthermore, in the above-mentioned heat treatment process, before the metal foil M passes through the pressing roller r2, it is initially preheated, i.e., preheated, by a heating plate t1 disposed between the angle adjustment roller and the pressing roller r2, wherein the temperature of the preheating treatment is preferably controlled below 150°C, and the length of the area of ​​the metal foil M flowing through the heating plate t1 and the pressing roller is 5 cm to 50 mm.

[0084] The sheet material includes: a release material film R, a liquid crystal polymer film F, and a metal foil M; the angle adjustment roller 4 is used to adjust the coating angle of the release material film R, the angle adjustment roller 5 is used to adjust the coating angle of the liquid crystal polymer film F. The angle adjustment roller 6 is used to adjust the coating angle of the metal foil M.

[0085] Furthermore, before laminating, each sheet is preheated by wrapping a laminating roller r1 with a release material film R, a metal foil M, and a liquid crystal polymer film F, and wrapping a laminating roller r2 with another metal foil M and another release material film R, and then heat-pressing and bonding the sheets with the laminating rollers; Among them, the laminated material after heat-pressing bonding passes through a pair of release rollers (release roller 7, release roller 7') and a pair of release rollers (release roller 8, release roller 8') to separate the release material film R, and then is wound up by a winding roller 9 to obtain a laminated body.

[0086] Furthermore, in the above adjustment process, the melting point of the liquid crystal polymer film F is 310°C and the thickness is 50 μm, the material of the release material film R is polyimide and the thickness is 75 μm, the metal foil M is aluminum foil and the thickness of the metal foil M is 75 μm. The release material film R covers the laminating roller r1 at an angle of 160°, the liquid crystal polymer film F covers the laminating roller r1 at an angle of 30°, and the metal foil M covers the laminating roller r2 at an angle of 60°. Both the laminating roller r1 and the laminating roller r2 are metal rollers.

[0087] In the heat treatment step, the preheating temperature of the heating plate t1 was 180° C., the surface temperature of the pressing roller r1 was 260° C., and the surface temperature of the pressing roller r2 was 260° C. When each sheet passed through the pressing roller, it was thermocompressed at a speed of 0.5 m / min, and the pressure of the pressing roller was set to 5 t / m during the thermocompressed bonding.

[0088] Embodiment 11 This embodiment provides a method for manufacturing a laminate, which is substantially the same as Embodiment 1, except that in this embodiment, the surface temperature of the lamination roller r1 is 300°C, the surface temperature of the lamination roller r2 is 150°C, and the speed of the hot pressing bonding is 1 m / min.

[0089] Example 12 This embodiment provides a method for manufacturing a laminate, which is substantially the same as Embodiment 1, except that the melting point of the raw material of the liquid crystal polymer film F in this embodiment is 280°C, the surface temperature of the lamination roller r1 is 280°C, the surface temperature of the lamination roller r2 is 150°C, and the hot pressing bonding speed is 1.5 m / min.

[0090] Example 13 This embodiment provides a method for manufacturing a laminate, which is substantially the same as Embodiment 1, except that the melting point of the raw material of the liquid crystal polymer film F in this embodiment is 280°C, and the speed of the hot pressing bonding is 0.5 m / min. The surface temperature of the laminating roller r1 is 300°C, the surface temperature of the laminating roller r2 is 150°C, the laminating angle of the release material film R covering the laminating roller r1 is 90°, the laminating angle of the liquid crystal polymer film F covering the laminating roller r2 is 5°, and the laminating angle of the metal foil M covering the laminating roller r2 is 10°. Both the laminating roller r1 and the laminating roller r2 are metal rollers.

[0091] Embodiment 14 This embodiment provides a method for manufacturing a laminated body. This embodiment is substantially the same as Embodiment 1, except that: Fig. 9 As shown, the liquid crystal polymer film F and the metal foil M share an angle adjustment roller, that is, the liquid crystal polymer film F and the metal foil M pass through Figure 6The angle adjustment rollers 6 shown in the figure are overlapped and then jointly cover the pressing roller r2, and the covering angle is 30°.

[0092] The release material film R covers the laminating roller r1 at an angle of 90°. The surface temperature of the laminating roller r1 is 280°C, and the surface temperature of the laminating roller r2 is 150°C. Embodiment 15 This embodiment provides a method for manufacturing a laminate, which is substantially the same as Embodiment 10, except that the surface temperature of the lamination roller r1 is 340°C, and the surface temperature of the lamination roller r2 is 340°C. The speed of the hot pressing bonding is 1 m / min. The thickness of the release material film R is 125 μm. The liquid crystal polymer film F covers the lamination roller r2 at a covering angle of 45°.

[0093] Comparative Example 1 This comparative example provides a method for manufacturing a laminate, which is substantially the same as Example 1, except that the lamination roller r2 in this example is a metal roller, and the surface temperature is 280°C.

[0094] Comparative Example 2 This comparative example provides a method for manufacturing a laminate, which is substantially the same as Example 1, except that in this example, the liquid crystal polymer film F wraps around the laminating roller r2 at an angle of 0°, and the metal foil M wraps around the laminating roller r2 at an angle of 5°.

[0095] Comparative Example 3 This comparative example provides a method for manufacturing a laminate, and this comparative example is substantially the same as Example 1, except that the speed of the thermal compression bonding in this example is 1.5 m / min.

[0096] Comparative Example 4 This comparative example provides a method for preparing a liquid crystal polymer film. This comparative example is substantially the same as Example 3, except that in this comparative example, the thickness of the release material film R is 75 μm.

[0097] Comparative Example 5 This comparative example provides a method for manufacturing a laminate, and this comparative example is substantially the same as Example 6, except that the angle adjustment rollers in this comparative example do not have a preheating function.

[0098] Comparative Example 6 This comparative example provides a method for manufacturing a laminated body, which is substantially the same as comparative example 5, except that the angle adjustment roller 6' is a heating roller with a preheating function to preheat the release material film R passing through the angle adjustment roller 6' and the laminating roller r1, and the surface of the heating roller is 150° C. In addition, the length of the release material film R passing through the angle adjustment roller 6' and the laminating roller r1 is 300 mm.

[0099] Comparative Example 7 This comparative example provides a method for manufacturing a laminate, and this comparative example is substantially the same as Example 2, except that the speed of the thermal compression bonding in this example is 1 m / min.

[0100] Comparative Example 8 This comparative example provides a method for manufacturing a laminate, and this comparative example is substantially the same as Example 1, except that the speed of the thermal compression bonding in this example is 2 m / min.

[0101] Comparative Example 9 This comparative example provides a method for manufacturing a laminated body, which is substantially the same as Example 1, except that the speed of the thermal compression bonding in this example is 2 m / min. The surface temperature of the compression roller r2 is 300°C.

[0102] Comparative Example 10 This comparative example provides a method for manufacturing a laminate, which is substantially the same as Example 1, except that the thickness of the release material film R in this example is 25 μm, the release material film R covers the lamination roller r1 at an angle of 90°, the liquid crystal polymer film F covers the lamination roller r2 at an angle of 5°, and the metal foil M covers the lamination roller r2 at an angle of 10°. The surface temperature of the lamination roller r2 is 300°C.

[0103] Performance Testing The method of determining bubbles is: after lamination, when light spots appear on the membrane surface. During the continuous lamination process of not less than 10m, if no more than 3 light spots appear, and the spot size is observable with the naked eye, or the diameter is greater than 0.3mm, it is defined as free of bubbles.

[0104] Method for judging wrinkles: After lamination, the film surface / metal foil surface has observable creases along the length direction. If no linear creases appear during the continuous lamination process of not less than 10m, it is defined as wrinkle-free. Among them, the crease is continuous and linear, the length exceeds 1cm, and it cannot be restored to flatness through the winding process, and it is easy to identify.

[0105] The test characteristics of the embodiments and comparative examples are as follows: Table 1 Test results of relevant material properties of the laminates prepared in Examples 1-15 and Comparative Examples 1-10

[0106] Table 2 Comparison of process parameters of laminates prepared in Examples 1-15 and Comparative Examples 1-10

[0107] Table 3 Comparison of relevant process parameters of the laminates prepared in Examples 1-15 and Comparative Examples 1-10

[0108] From the analysis of the experimental results in Table 1 above, it can be seen that by setting an angle adjustment roller before the release material film R, the liquid crystal polymer film F, and the metal foil M enter a pair of lamination rollers for lamination, the film material, such as the liquid crystal polymer film F, the metal foil M and the corresponding lamination roller can be adjusted to better achieve the adjustment of the coating angle, thereby increasing the coating area and extending the coating time, so that before lamination, the liquid crystal polymer film F and the metal foil M are preheated with the help of the lamination roller, so as to better prevent the liquid crystal polymer film F and the metal foil M from forming different degrees of deformation before entering the roller and being pressed, and thus better avoid being directly pressed in the process of relaxation caused by the gradual transition from low temperature to high temperature, so as to maximize the avoidance of obvious wavy deformation, so as to achieve the liquid crystal polymer film F and the metal foil M to keep the film surface flat before entering the roller, and thus can effectively suppress wrinkles and the appearance of poor appearance such as stripes.

[0109] Furthermore, through the comparison between the above-mentioned Example 13 and the comparative example 10, it can be known that when the speed of the hot pressing bonding is low and the thickness of the release material film R is relatively thin, for example, when the speed of the hot pressing bonding is 0.5 m / min and the thickness of the release material film R is 25 μm, the angle between the liquid crystal polymer film F and the corresponding pressing roller is preferably greater than 5 degrees, and at the same time, the angle between the metal foil M and the corresponding pressing roller is preferably greater than 15 degrees, which can effectively suppress wrinkles and avoid the appearance of poor appearance such as stripes.

[0110] When the speed of hot pressing bonding is relatively high and the thickness of the release material film R can be relatively thick, for example, when the speed of hot pressing bonding is 1m / min and the thickness of the release material film R is 75μm, the angle between the liquid crystal polymer film F and the corresponding pressing roller is preferably greater than 30 degrees. At the same time, the angle between the metal foil M and the corresponding pressing roller is within 160 degrees, which can effectively suppress wrinkles, avoid streaks, bubbles and other poor appearance.

[0111] In addition, through the analysis and comparison of Example 1 and Comparative Examples 1 to 2, it can be seen that one of the lamination rollers in a pair of lamination rollers is set as a high-temperature roller, and the other lamination roller can be set as a high-temperature roller or a non-high-temperature roller according to needs, so as to better meet the temperature requirements of hot pressing bonding. At the same time, while preheating the sheets in the laminated material, the liquid crystal polymer film F or the metal foil M is prevented from directly contacting the high-temperature roller, which can better reduce or suppress wrinkles.

[0112] Through the analysis and comparison of Example 3 and the comparative example, it can be seen that by reasonably controlling the thickness of the release material film, the problem of insufficient preheating can be improved, so that the pressing point temperature can meet the requirements and other process parameters can be optimized.

[0113] In addition, this application adopts Figures 1 to 9 The stacking method shown can improve the production efficiency of the stacked body, reduce production costs, and expand its application field.

[0114] In addition, in a further preferred solution, in the manufacturing method of the above-mentioned laminate, a preheating component can be added to preheat each sheet, such as any one or a combination of two or more of the release material film R, the liquid crystal polymer film F, and the metal foil M. For example, the corresponding angle adjustment roller is set as a preheating roller, or a heating plate is set between the corresponding angle adjustment roller and the pressing roller, which can ensure the relative continuity of the temperature and prevent the relaxation of each sheet in the laminated material after the metal foil contacts the high-temperature roller, which causes wrinkles in the prepared laminate, and plays a good role in improving thermal deformation. In addition, by controlling the distance between the preheating component and the pressing roller within a reasonable range, it is possible to prevent the tension relaxation of the corresponding sheet and reduce the covering angle of the pressing roller.

[0115] Through the analysis and comparison of Example 1, Example 4, Example 6 and Comparative Example 5 and Comparative Example 6, it can be seen that if the metal composite foil R1 composed of aluminum foil with epoxy silicone coating on the surface is used as the release material film R, the high-temperature dimensional stability of the aluminum foil becomes low, and the thermal deformation caused by direct contact with the high-temperature roller can easily cause wrinkles on the laminated body after it is manufactured. Therefore, the metal composite foil R1 is preheated by an angle adjustment roller with a preheating function, or the metal composite foil R1 is indirectly contacted with the high-temperature roller, such as Figure 3 As shown in the combination, alternatively, the two opposite sides of the metal composite foil R1 are isolated with a high temperature resistant release material film, such as a non-polyimide material, which can effectively buffer the heat and prevent the aluminum foil and the LCP film from directly contacting the high temperature roller, thereby effectively suppressing wrinkles and avoiding the occurrence of stripes, bubbles, etc., to meet different production process requirements.

[0116] In addition, through comparative analysis of Example 1 and Comparative Example 8, it can be seen that: when other conditions remain unchanged, if the speed of the lamination roller is too large, for example, greater than or equal to 2m / min, insufficient thermal effect may occur, and the temperature of the lamination point may not reach the temperature required for lamination, resulting in bubbles. At the same time, it may also easily cause damage to the film surface of the laminate when it is peeled off.

[0117] In addition, the present application preheats each sheet in the stacked material and then presses it together, so that the stacked material is hot-pressed together by passing through a pair of high-temperature pressing rollers or a pair of pressing rollers with a large temperature difference between the roller surfaces. This can effectively suppress wrinkles and the appearance of poor appearance such as streaks, meet the process design requirements of different products and the production requirements of equipment, thereby optimizing process parameters.

[0118] In addition, the present application can also preferably control the angle difference between the coating angles of the isolation film and the liquid crystal polymer film F, and the isolation film composed of the metal foil M and the liquid crystal release material film R, while other conditions remain unchanged, so that before being pressed together, the surface temperature difference between the isolation film and the liquid crystal release material film R can satisfy the requirements of hot pressing bonding while avoiding the occurrence of wrinkles or bubbles.

[0119] The above are only preferred embodiments of the present application and do not have any limiting effect on the present application. Any technical personnel in the relevant technical field, without departing from the scope of the technical solution of the present application, may make any form of equivalent replacement or modification to the technical solution and technical content disclosed in the present application, which shall be deemed as the content of the technical solution of the present application and still fall within the protection scope of the present application.

Claims

1. A method for producing a laminate, characterized in that: It includes: A process of providing a plurality of angle adjustment rollers, and adjusting the angle of a corresponding sheet material wrapped around a pair of pressing rollers before being heat-pressed and bonded by a pair of pressing rollers by using each angle adjustment roller, wherein the sheet material includes: a release material film, a liquid crystal polymer film, and a metal foil; A heat treatment process in which each sheet is released from a corresponding unwinding roller and then passes through a pair of pressing rollers in a preset order to form a laminated material, wherein each sheet is preheated before being stacked and then passes through the pressing rollers for heat-compression bonding; The laminated material after the thermal compression bonding is subjected to a separation process, and after the release material film is peeled off, a winding step is performed to obtain a laminated body composed of the liquid crystal polymer film and the metal foil.

2. The method for manufacturing a laminate according to claim 1, wherein: The angle adjustment rollers include: a first angle adjustment roller for adjusting the liquid crystal polymer film, a second angle adjustment roller for adjusting the metal foil, and a third angle adjustment roller for adjusting the release material film; Wherein, each angle adjustment roller is respectively arranged between the corresponding unwinding roller and the pressing roller; The first angle adjustment roller and the second angle adjustment roller are a common adjustment roller or two independent adjustment rollers.

3. The method for manufacturing a laminate according to claim 1, wherein: The wrapping angles of the release material film, the liquid crystal polymer film, and the metal foil decrease in sequence from the side contacting the same lamination roller to the side away from the same lamination roller; The wrapping angle of the release material film is inversely proportional to the thickness of the release material film; And / or, the wrapping angle of the release material film is 30°~180°.

4. The method for producing a laminate according to any one of claims 1 to 3, characterized in that: The release material film or metal foil used to cover the liquid crystal polymer film is a separation film, and the liquid crystal polymer film is in contact with the lamination roller through the separation film; Wherein, when the angle difference between the covering angles of the isolation film and the liquid crystal polymer film is 0° to 130°, the angle difference is proportional to the thickness of the isolation film.

5. The method for producing a laminate according to claim 4, wherein: If the lamination roller that contacts the isolation film and performs the preheat treatment is a metal roller, the angle difference between the coating angles of the isolation film and the liquid crystal polymer film is 15°~60°; or, if the lamination roller that contacts the isolation film and performs the preheat treatment is a metal roller with a non-metallic layer on the outside, the angle difference between the coating angles of the isolation film and the liquid crystal polymer film is 5°~60°.

6. The method for producing a laminate according to claim 1, wherein: In the heat treatment process, the liquid crystal polymer film is preheated by the lamination roller for a time period of 1 second to 60 seconds; And / or, the time for the metal foil to undergo the preheating treatment by passing through the lamination roller is 1 s to 60 s.

7. The method for manufacturing a laminate according to claim 1, wherein: In the heat treatment step, the roller surface temperature of the pair of pressing rollers, the roller surface temperature of which is relatively high, is (T m -50℃)~(T m +30℃), where the T m is the melting point temperature of the raw material of the liquid crystal polymer film.

8. The method for producing a laminate according to claim 1, wherein: In the heat treatment step, the pressing roller is used to form a hot pressing pressure of 1 t / m to 10 t / m on the laminated material.

9. The method for producing a laminate according to claim 1, wherein: In the heat treatment process, the hot pressing pressure formed by the lamination material by the lamination roller is 2t / m~7t / m; And / or, the tension of the unwinding roller is 20-500 N / m; And / or, the diameter of the lamination roller is 240-600 mm.

10. The method for manufacturing a laminate according to claim 1, wherein: During the winding process, the stacked material flows through a pair of pressing rollers at a rate of 0.1-5 m / min.

11. The method for producing a laminate according to claim 1, wherein: During the winding process, the stacked material flows through a pair of pressing rollers at a rate of 0.5-1.5 m / min.

12. The method for manufacturing a laminate according to claim 1, wherein: The release material film has a thickness of 10-200 μm.

13. The method for producing a laminate according to claim 1, wherein: The release material film has a thickness of 25-150 μm.

14. The method for manufacturing a laminate according to claim 1, wherein: The material of the metal foil is any one of copper, iron, nickel and aluminum; Alternatively, the metal foil is made of alloy metal.

15. The method for manufacturing a laminate according to claim 1, wherein: The material of the release material film is any one of polyimide film, polyetheretherketone film, polyphthalamide film, polyetherimide film, and metal foil; And / or, the material of the release material film is a composite film, wherein the composite film is a combination of any two or more of a fluorine-containing film, a polyimide film, a non-woven fabric, a glass fiber fabric, and a metal foil layer; And / or, the laminate is a single-sided metal-clad composite body or a double-sided metal-clad composite body.

16. The method for manufacturing a laminate according to claim 1, wherein: The pair of laminating rollers includes: a metal roller, another metal roller combined with the metal roller and provided with a non-metallic layer on the outside; Wherein, the material of the non-metallic layer is any one of silicone rubber, polyimide material and its modified material, polyetheretherketone film material, or aramid material or a combination thereof.

17. The method for manufacturing a laminate according to claim 1, wherein: Arrangement and hot pressing of the stacked materials in any of the following order; Release material film / liquid crystal polymer film / metal foil; Alternatively, release material film / liquid crystal polymer film / metal foil / release material film; Alternatively, release material film / liquid crystal polymer film / metal foil / metal foil / liquid crystal polymer film / release material film; Or, release material film / metal foil / liquid crystal polymer film / metal foil / release material film.

18. The method for manufacturing a laminate according to claim 1, wherein: The heat treatment process further includes: before the sheet contacts the lamination roller, performing a preheating treatment by providing a preheating component.

19. The method for producing a laminate according to claim 18, wherein: The preheating assembly is a heating plate disposed between the angle adjustment roller and the lamination roller, or an angle adjustment roller having a preheating function; And / or, the distance between the preheating assembly and the pressing roller for contacting the release material film is less than or equal to 50 mm; And / or, the preheating temperature of the preheating component is controlled below 150° C.; And / or, the sheet material used for the preheating treatment is a metal composite foil.

20. The method for manufacturing a laminate according to claim 18, wherein: The distance between the preheating assembly and the pressing roller for contacting the release material film is less than or equal to 20 mm.

Images