Composite material production system
By using a peelable layer loading glue layer in composite material production, excessive stretching of the substrate layer is avoided, and the problem of loss of mechanical properties of the substrate layer is solved, and the production of thinner, lighter or excellent conductive properties is achieved, improving production efficiency and yield.
Patent Information
- Application Number
- CN202422128822.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-31
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-08-31
AI Technical Summary
In the existing composite material production process, the tensile of the substrate layer leads to loss of mechanical properties, affecting product quality and yield. The substrate layer material selection is limited, making it difficult to achieve thinner, lighter or excellent conductive composite materials.
The method of loading the rubber layer with a peelable layer is adopted. The peelable layer is peeled off before the substrate layer is combined with the functional layer to avoid excessive stretching of the substrate layer, and the release layer is used to provide support, reducing the tensile strength and elongation requirements of the substrate layer, and achieving rapid and convenient transfer and recombination of the rubber layer.
It reduces the mechanical performance loss of the substrate layer, improves production efficiency, expands the range of substrate layer selection, and can produce thinner, lighter or better conductive composite materials, improving yield and convenience of the composite process.
Smart Images
Figure CN223161387U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of composite material production, and more specifically, to a composite material production system. Background Art
[0002] In the prior art, a production process of composite materials (such as composite current collectors) based on an adhesive layer to realize the lamination of a substrate layer and a functional layer has been proposed. The adhesiveness on the substrate layer is provided by the adhesive liquid on the substrate layer. In the production of this type of process, an adhesive layer needs to be formed on the substrate layer first. And in the process of forming the adhesive layer on the substrate layer, the transmission and as much stretching as possible of the substrate layer are often involved. Since the thickness of the substrate layer is usually only a few micrometers, such as the currently common ultra-thin films of PET, PP, PI, etc.; on the one hand, there are often high requirements for the tensile strength, elasticity, etc. of the substrate layer, which limits the selection of the substrate layer material and the thickness of the substrate layer applicable to this type of process, and is not conducive to the further optimization and development of the composite current collector; on the other hand, coating the adhesive layer on both sides of the substrate layer not only affects the production efficiency, but also in order to coat evenly and sufficiently, the substrate layer needs to be stretched and extended as much as possible each time. And in this process, a certain degree of irreversible damage will be caused to the substrate layer of a few micrometers, affecting the quality of the final product; it may also cause the generation of waste products and affect the yield.
[0003] Therefore, there is an urgent need for an improved composite material production system that can reduce or avoid damage to the substrate layer caused by excessive stretching and continuous stretching of the single substrate, and on this premise, realize the combination between the substrate layer and the adhesive layer, and facilitate the subsequent lamination with other foil layers. Summary of the Utility Model
[0004] The utility model aims to overcome at least one of the above-mentioned deficiencies of the prior art, and provides a composite material production system, which avoids excessive stretching of the substrate layer and reduces the loss of the mechanical properties of the substrate layer during the pre-treatment process before lamination.
[0005] The technical solution adopted by the utility model is that a composite material production system, the composite material includes a substrate layer, an adhesive layer and a functional layer, and includes the following arranged in sequence from upstream to downstream:
[0006] A substrate lamination subsystem for laminating a viscous material layer on at least one side of the substrate layer to obtain a laminated substrate layer; the viscous material layer includes an adhesive layer and a peelable layer on one side of the adhesive layer, and the peelable layer is located on the side away from the substrate layer after lamination;
[0007] A peeling assembly for peeling the peelable layer on the corresponding side before the substrate layer is laminated with the functional layer through the adhesive layer;
[0008] A functional layer lamination subsystem for laminating the substrate layer so that it is laminated with the functional layer through the exposed adhesive layer, and guiding away the obtained composite material.
[0009] In this application, the adhesive layer is loaded on the peelable layer, and then, only by keeping the substrate layer flat, the adhesive layer can be transferred onto the substrate layer by the lamination of the peelable layer and the substrate layer. During this process, since the adhesive layer has been shaped, and the substrate layer only needs to be slightly stretched for easy lamination with the adhesive layer; the requirements for the tensile strength and elongation of the substrate layer are reduced, and the lamination process is fast and convenient. Compared with coating the adhesive layer on the substrate layer, the continuous long-time stretching of the substrate layer during the process is avoided. In order to make the adhesive layer fit flatly, only the peelable layer needs to be stretched as much as possible. Since the peelable layer is peeled off during the subsequent lamination process, the thickness range of the peelable layer can be large, and its thickness can be increased as much as possible to meet the requirements during the stretching process, etc., and there is no need to worry about damage to the peelable layer. In addition to the situation where the substrate layer only needs to be laminated with the functional layer through the adhesive layer on one side, when both sides of the substrate layer need to be laminated with the functional layer through the adhesive layer, the adhesive layer can be transferred to both sides of the substrate layer through the peelable layer, which is more efficient and faster than the prior art; in addition, the adhesive layer can also be transferred through the peelable layer first, and then the peelable layer can be used as a support to complete the formation of the adhesive layer on the other side of the substrate layer by coating; that is, in addition to directly transferring the adhesive layer through the peelable layer, when the adhesive material layer has been laminated on one side of the substrate layer, the adhesive liquid can be directly coated on the surface of the other side of the substrate layer; it can also reduce or avoid the defects existing in the process of forming the adhesive layer by the traditional method of stretching the substrate layer alone and coating the adhesive liquid, and is suitable for various production environments. That is, the substrate lamination subsystem can laminate the adhesive material layer on one side of the substrate layer; and laminate the adhesive material layer on the other side of the substrate layer, or, coat the adhesive liquid on the other side of the substrate layer (the side without the laminated adhesive material layer). Since the adhesive material layer has been laminated on one side of the substrate layer, the peelable layer in the adhesive material layer provides a support structure for the substrate layer during the stretching process; on the premise of reaching the required surface stretching state for coating the adhesive liquid on the substrate layer, the overall tensile strength can be enhanced by using the laminated adhesive material layer, so as to reduce or avoid excessive stretching of the substrate layer, and further avoid damage to the substrate layer. Further, when the adhesive liquid is coated on the substrate layer to form the adhesive layer, a peelable layer is also covered on the adhesive layer; further, when the adhesive material layer is laminated on one side of the substrate layer, it can be wound up first, and then unwound for coating the adhesive liquid on the other side later.
[0010] Based on the solution of this application, under the premise of ensuring that the transferable adhesive layer is on the substrate layer, since the tensile requirements for the substrate layer are reduced, the substrate layer can be made of a substrate layer with a smaller thickness or a lower tensile strength material but with improved conductive properties, so as to realize a thinner and lighter composite current collector or a composite current collector with better conductive properties according to the needs. Furthermore, the composite material includes a substrate layer, an adhesive layer and a functional layer, and the adhesive layer is located between the substrate layer and the functional layer; when it is required to composite the functional layer on both sides of the substrate layer, the composite material then includes at least a five-layer structure, including a middle substrate layer, an outer functional layer and an adhesive layer between the substrate layer and the functional layer. Furthermore, when the adhesive material layer is a material made using an offline process, the adhesive material layer is a shaped adhesive layer and a bonded peelable layer; then the substrate layer is sequentially composited with the adhesive material layer through the substrate composite subsystem, and the peelable layer is peeled off by the peeling component to reach the functional layer composite subsystem, and the composite material is obtained after the substrate layer is composited with the functional layer through the adhesive layer.
[0011] Furthermore, the substrate layer has a thickness of 1.5 to 10 μm. Furthermore, the substrate composite subsystem at least includes a pressing component.
[0012] Furthermore, the substrate laminating subsystem includes: a substrate transmission mechanism, an adhesive transmission mechanism, and a laminating assembly. The substrate transmission mechanism transmits the substrate layer toward the laminating assembly. The adhesive transmission mechanism is eccentrically positioned relative to the substrate transmission mechanism, transmitting the adhesive layer toward the laminating assembly with the adhesive layer facing the substrate layer. The laminating assembly laminates the substrate layer and the adhesive layer. Depending on whether there is an upstream pretreatment step, the substrate transmission mechanism can be a transmission roller or an unwinding mechanism, transmitting the substrate layer from one end to the laminating assembly. The adhesive transmission mechanism can also be a transmission roller or an unwinding mechanism, depending on whether the adhesive layer is formed online or offline. The eccentric positioning of the adhesive transmission mechanism facilitates synchronous transmission of the adhesive layer on one side of the substrate layer being transmitted, ultimately reaching the laminating assembly. The laminating assembly can be formed by a pair of upper and lower pressing rollers, with the substrate layer and the adhesive layer being transmitted between the upper and lower pressing rollers for lamination. The adhesive layer of the adhesive layer faces the substrate layer, facilitating lamination of the adhesive layer and the substrate layer after lamination by the laminating assembly, thereby bonding the adhesive layer to the substrate layer.
[0013] Further, it includes two adhesive material transmission mechanisms, which are respectively located on both sides of the substrate transmission mechanism, and both make the adhesive layer side of the adhesive material layer face the substrate; the pressing assembly presses the two sides of the substrate layer and the corresponding side adhesive material layer. For composite foils including composite current collectors as an example, usually composite foil layers need to be provided on both sides; if the traditional method of coating the adhesive layer is adopted, at least the coating and pre-curing on one side of the substrate layer need to be carried out first, and then the coating, pre-curing and drying on the other side of the substrate layer, etc. steps. For the same substrate layer, frequent stretching of the substrate layer will be involved. Moreover, the states such as the pressure generated during coating contact and the load of the adhesive liquid during the coating process have the obvious above-mentioned adverse effects, with high requirements for the stretching performance of the substrate layer and may damage the substrate layer. However, if the composite foil production system of the present application is adopted, on the basis of only keeping the substrate layer flat, the corresponding side adhesive material layers are synchronously transmitted to the pressing assembly through the upper and lower two adhesive material transmission mechanisms, so that the adhesive material layers can be simultaneously laminated on both sides of the substrate layer at the pressing assembly, and the adhesive layers are simultaneously transferred to both sides of the substrate layer and enter the subsequent peeling and lamination processes; not only it avoids the multiple coating, pre-curing and other conditions under the stretching state of the substrate layer, and avoids the limitations or adverse effects brought by frequent stretching, but also the process of transferring the adhesive layer to the substrate layer is simple and efficient, which can improve the processing efficiency of the substrate layer and even the overall production efficiency of the composite foil.
[0014] Further, the adhesive material transmission mechanism is an adhesive material unwinding device for unwinding and carrying the wound adhesive material layer.
[0015] Further, the substrate lamination subsystem further includes a first release layer unwinding device, a first coating device, and a first pre-curing device arranged upstream of the adhesive material transmission mechanism. The first release layer unwinding device unwinds the release layer, the first coating device coats the adhesive liquid on the release layer, and the first pre-curing device pre-cures the coated adhesive liquid to obtain an adhesive material layer with an adhesive layer and a release layer. That is, the adhesive material layer can be formed by on-line coating. However, since the release layer is finally peeled off, it can adopt thicker and more diverse materials, as long as it can support the adhesive layer. Based on the on-line method, it is beneficial to directly produce the final composite foil based on the existing supply products, reduce the time interval of the divided processes, and improve the production efficiency. Further, the adhesive transmission mechanism is a transmission roller, and the adhesive material layer is transmitted by the transmission roller and moves towards the pressing assembly.
[0016] Further, in addition to the direct lamination method using the adhesive material layer on one or both sides, it is also possible to first directly laminate the adhesive material layer on one side, and then form the other side adhesive layer by an on-line coating method based on the substrate layer with the adhesive material layer already laminated on one side, finally obtaining a laminated current collector with adhesive layers on both sides. Correspondingly, the substrate lamination subsystem includes a substrate transmission mechanism, an adhesive material transmission mechanism, a lamination assembly, a second coating device, and a second pre-curing device. The substrate transmission mechanism drives the substrate layer towards the lamination assembly, with the side of the adhesive layer facing the substrate layer. The lamination assembly laminates one side of the substrate layer with the adhesive material layer. The second coating device receives the substrate layer that has passed through the lamination assembly and coats the adhesive liquid on the side of the substrate layer where the adhesive material layer has not been laminated. The second pre-curing device pre-cures the coated adhesive liquid so that both sides of the substrate layer have adhesive layers. The substrate transmission mechanism conveys the substrate layer, and the adhesive material transmission mechanism is eccentrically arranged relative to the substrate transmission mechanism. The adhesive material transmission mechanism drives the adhesive material layer towards the lamination assembly. After the substrate layer reaches the lamination assembly, it is laminated with the adhesive material layer on one side by the lamination assembly. After lamination, it enters the downstream second coating device, which coats the adhesive on the side of the substrate layer where the adhesive material layer has not been laminated. The second pre-curing device cures the adhesive liquid to form an adhesive layer. This system can achieve a substrate layer treatment method that combines directly laminating the adhesive material layer on the substrate layer and coating the adhesive liquid on the substrate layer, finally enabling both sides of the substrate layer to have adhesive layers. Further, it may also include a second release layer unwinding mechanism to facilitate covering the release layer on the formed adhesive layer.
[0017] Further, the release layer includes a release film; and / or, the functional layer includes a foil layer; and / or, the substrate layer includes a PET film, a PP film, and a PI film. Further, the foil layer includes a copper foil layer.
[0018] Further, the functional layer lamination subsystem includes a combination of pressure rollers, a supporting roller body, and a guiding and separating roller. The combination of pressure rollers is formed by two or more pressure roller assemblies. Each pressure roller assembly includes a pressure roller and a telescopic mechanism connected to the pressure roller. The combination of pressure rollers is at least used to drive the substrate layer carrying the adhesive layer. The surface of the supporting roller body carries the functional layer. The combination of pressure rollers and the surface of the supporting roller body are configured to jointly laminate the substrate layer carrying the adhesive layer with the functional layer to obtain a composite material. The guiding and separating roller is used to pull the composite material away from the surface of the supporting roller body. When the combination of pressure rollers cooperates with the supporting roller body, the pressure roller assemblies are configured to make the corresponding pressure rollers cooperate with the surface of the supporting roller body to provide a lamination space, and the pressure rollers in the combination of pressure rollers are arranged circumferentially along the surface of the supporting roller body. The foil lamination subsystem can be applied to the lamination process of thin and easily breakable materials and ensure the lamination quality. The composite current collector production system formed based on the foil lamination subsystem has a simple structure, is convenient for deployment and installation, and the obtained composite product has corresponding good performance.
[0019] The pressure roller assemblies are arranged circumferentially along the surface of the abutting roller body, and can be adapted to the cylindrical side surface of a roller-shaped or wound material. When the substrate layer carrying the adhesive layer travels between the pressure roller assembly and the wound material, the pressure roller assembly can press down the substrate layer carrying the adhesive layer onto the foil layer of the abutting roller body and press it downward toward the foil layer side to achieve the adhesion and pressing between the substrate layer and the foil layer. When at least two pressure roller assemblies are provided in the pressure roller assembly, at least two areas of pressing are achieved on the corresponding cylindrical side surface. On the one hand, it is convenient to extend the pressing time and improve the pressing quality on the premise of ensuring the continuous production of the material; on the other hand, it is also convenient to implement different area pressing settings according to the material characteristics. In the case where the distance between the pressure roller assembly and the abutting surface such as the surface of the roller body hardly changes, the telescopic mechanism at least maintains and adjusts the telescopic length to ensure a relatively stable pressing pressure. For example, for an abutting roller body such as a cathode roller for producing a metal foil layer on the surface, during the composite process, the distance between the pressure roller and the cathode roller hardly changes; the telescopic mechanism is not only extended to provide pressure when pressing is required, but it can be applied to various scenarios. Further, the pressure roller assemblies in the pressure roller assembly are arranged circumferentially along the surface of the abutting roller body. At least in the contracted state of the telescopic mechanism, the telescopic mechanisms are also arranged circumferentially accordingly. This is beneficial to adopt the same telescopic mechanism to adapt to the pressing at multiple positions on the arc of the cylindrical side surface of the abutting roller body, and at the same time reduce the control difficulty of the corresponding device control program for different pressure roller assemblies.
[0020] Further, the abutting roller body is a cathode roller. Further, the composite material includes a composite current collector.
[0021] Compared with the prior art, the beneficial effects of the present application are as follows: Based on the composite foil material production system of the present application, it is possible to achieve the combination between the substrate layer and the adhesive layer on the premise of avoiding excessive stretching of the substrate and ensuring that the performance of the substrate layer is not lost, and it is convenient to realize the subsequent composite with other foil layers. Especially during the process of providing the adhesiveness of the substrate, it is possible to avoid multiple and continuous separate excessive stretching of the substrate layer, reduce the loss of the mechanical properties of the substrate layer during the pre-treatment process before composite; it is convenient to improve the quality of the final product and increase the production yield. And through the system or method of the present application, the requirements for the tensile strength and elongation rate of the substrate layer can be reduced. The substrate layer can adopt a substrate layer with a smaller thickness or a low material tensile strength but convenient for improving the electrical conductivity, expanding the selection range of the substrate layer, and being convenient to realize a thinner and lighter composite current collector or a composite current collector with better electrical conductivity according to the requirements. Moreover, the composite process is fast and convenient, and the production efficiency is also convenient to be improved. Description of the Drawings
[0022] Figure 1 It is a schematic structural diagram of the composite foil material production system of the present application.
[0023] Figure 2 It is a schematic structural diagram (one) of the foil material composite subsystem of the present application.
[0024] Figure 3 This is a schematic structural diagram of the substrate composite subsystem for online coating of the peelable layer in this application.
[0025] Figure 4 This is a schematic structural diagram of the cooperation of the inlet roller, the pressure roller combination and the outlet roller in this application.
[0026] Figure 5 This is a three-dimensional structural diagram of the cooperation of the inlet roller, the pressure roller combination and the outlet roller in this application.
[0027] Figure 6 This is a partial structural diagram (II) of the foil composite subsystem in this application.
[0028] Figure 7 This is a schematic structural diagram of the substrate composite subsystem for the process of laminating with the adhesive material layer and online coating the substrate layer in this application.
[0029] Description of the drawings: Composite foil production system 1000, substrate composite subsystem 1100, substrate transmission mechanism 1110, adhesive material transmission mechanism 1120, lamination assembly 1130, first coating device 1210, first pre-curing device 1220, second coating device 1310, second pre-curing device 1320, peeling assembly 2100, foil composite subsystem 3000, inlet roller 3101, height adjustment mechanism 3102, outlet roller 3103, pressure roller combination 3120, pressure roller 31211, telescopic mechanism 31212, preliminary lamination roller 3121A, final lamination roller 3121B, transition lamination roller 3121C, abutting roller body 4100, laminated substrate layer 5100, substrate layer 5110, adhesive material layer 5120, adhesive layer 5121, peelable layer 5122, foil layer 5200, composite foil 5300. Detailed implementation manners
[0030] The drawings of the present utility model are only for illustrative purposes and should not be construed as a limitation to the present utility model. For better illustrating the following embodiments, some components in the drawings will be omitted, enlarged or reduced, which do not represent the dimensions of the actual products; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.
[0031] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments. However, those skilled in the art will understand that the following described embodiments are some embodiments of the present utility model, rather than all embodiments, and are only used to illustrate the present utility model, and should not be regarded as limiting the scope of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model. For those conditions not specified in the embodiments, they are carried out according to conventional conditions or conditions recommended by the manufacturer. For reagents or instruments not specified by the manufacturer, they are all conventional products that can be obtained through commercial purchase. Embodiment 1
[0032] As Figure 1 shown, this embodiment discloses a composite foil material production system 1000, including: a substrate composite subsystem 1100, configured to press a viscous material layer 5120 on both sides of a substrate layer 5110 to obtain a composite substrate layer 5100; the viscous material layer 5120 includes an adhesive layer 5121 and a peelable layer 5122 on one side of the adhesive layer 5121, and after composite, the peelable layer 5122 is located on the side away from the substrate layer 5110; a peeling assembly 2100, configured to peel the peelable layer 5122 on the corresponding side before the substrate layer 5110 is composite with a foil layer 5200 through the adhesive layer 5121; a foil composite subsystem 3000, configured to press the substrate layer 5110 to make it composite with the foil layer 5200 through the exposed adhesive layer 5121 and guide away the obtained composite foil 5300. Among them, the peelable layer 5122 includes a release film layer; the foil layer 5200 includes a copper foil layer; the substrate layer 5110 can adopt a PET, PP or PI ultra-thin film with a thickness of 1.5 - 10 μm.
[0033] The substrate composite subsystem 1100 includes: a substrate transmission mechanism 1110, a viscous material transmission mechanism 1120, and a pressing assembly 1130. The substrate transmission mechanism 1110 transmits the substrate layer 5110 toward the pressing assembly 1130. The viscous material transmission mechanism 1120 is eccentrically arranged relative to the substrate transmission mechanism 1110, so that the viscous material layer 5120 is transmitted toward the pressing assembly 1130, and one side of the adhesive layer 5121 faces the substrate layer 5110; the pressing assembly 1130 presses the substrate layer 5110 and the viscous material layer 5120. Depending on whether there are pre-processing steps upstream, the substrate transmission mechanism 1110 can be a transmission roller or an unwinding mechanism, transmitting the substrate layer 5110 from one end to the laminating assembly 1130. The viscous material transmission mechanism 1120 can also be a transmission roller or an unwinding mechanism, depending on whether the viscous material layer 5120 is formed online or offline. The viscous material transmission mechanism 1120 is arranged eccentrically to the substrate transmission mechanism 1110, synchronously transmitting the viscous material layer 5120 on one side of the transmitted substrate layer 5110. The adhesive layer 5121 of the viscous material layer 5120 faces the substrate layer 5110, and finally reaches the laminating assembly 1130. The laminating assembly 1130 is formed by a pair of upper and lower pressing rollers. The substrate layer 5110 and the viscous material layer 5120 are transmitted between the upper and lower pressing rollers for lamination.
[0034] In this embodiment, the composite foil 5300 serves as the composite current collector. To achieve simultaneous double-sided processing of the substrate layer 5110, the substrate laminating subsystem 1100 includes two viscous material transmission mechanisms 1120, one on either side of the substrate transmission mechanism 1110. Each mechanism orients the adhesive layer 5121 of the viscous material layer 5120 toward the substrate. The laminating assembly 1130 presses both sides of the substrate layer 5110 against the corresponding viscous material layer 5120. Simultaneously, the adhesive layer 5121 is transferred to both sides of the substrate layer 5110, and the subsequent stripping and laminating processes begin.
[0035] When using online production, such as Figure 3 As shown, the substrate composite subsystem 1100 may further include a first peelable layer unwinding device, a first glue coating device 1210, and a first pre-curing device 1220. The first peelable layer unwinding device unwinds the peelable layer 5122, the first glue coating device 1210 coats glue on the peelable layer 5122, and the first pre-curing device 1220 pre-cures the coated glue to obtain a viscous material layer 5120. The viscous transmission mechanism is a transmission roller, and the viscous material layer 5120 is driven by the transmission roller and moves toward the laminating assembly 1130.
[0036] After the composite substrate layer 5100 is obtained, the peelable layer 5122 is peeled off by the peeling assembly 2100 ; and then the composite process is carried out by the foil composite subsystem 3000 .
[0037] likeFigure 2 , 4 , as shown in Figure 5, in this embodiment, the foil composite subsystem 3000 includes an inlet roller 3101, a pressure roller assembly 3120, a supporting roller body 4100, and a deflector roller 3103. A height adjustment mechanism 3102 is connected to the end of the inlet roller 3101. The pressure roller assembly 3120 is formed by two or more pressure roller components. Each pressure roller component includes a pressure roller 31211 and a telescopic mechanism 31212 connected to the pressure roller 31211. The inlet roller 3101 feeds the pre-composite substrate layer 5100 to the pressure roller assembly 3120. The pressure roller assembly 3120 is at least used to drive and carry the substrate layer 5110 with an adhesive layer 5121. The surface of the supporting roller body 4100 carries a foil layer 5200. The surfaces of the pressure roller assembly 3120 and the supporting roller body 4100 are configured to jointly composite the substrate layer 5110 with the adhesive layer 5121 and the foil layer 5200 to obtain a composite foil 5300. The deflector roller 3103 is used to pull the composite foil 5300 away from the surface of the supporting roller body 4100. When the pressure roller assembly 3120 cooperates with the supporting roller body 4100, the pressure roller component is configured to make the corresponding pressure roller 31211 cooperate with the surface of the supporting roller body 4100 to provide a pressing space, and the pressure rollers 31211 in the pressure roller assembly 3120 are arranged circumferentially along the surface of the supporting roller body 4100.
[0038] During the specific composite process, the pressure roller components are arranged circumferentially along the surface of the supporting roller body 4100, which can adapt to the cylindrical side surface of the supporting roller body 4100. When the substrate layer 5110 with the adhesive layer 5121 travels between the pressure roller assembly 3120 and the foil, the pressure roller assembly 3120 can press down the substrate layer 5110 with the adhesive layer 5121 onto the foil layer 5200 and press it downward toward the foil layer 5200 to achieve the adhesion and pressing between the substrate layer 5110 and the foil layer 5200. Then it is deflected by the deflector roller 3103. The supporting roller body 4100 can be a cathode roller carrying the foil layer 5200. Among them, the pressure roller components in the pressure roller assembly 3120 are arranged circumferentially along the surface of the supporting roller body 4100. At least in the contracted state of the telescopic mechanism 31212, the telescopic mechanisms 31212 are also arranged circumferentially accordingly.
[0039] As Figure 6As shown, in order to improve the compounding effect, in this embodiment, the pressure roller 31211 near the upstream end of the pressure roller combination 3120 is the preliminary pressure roller 3121A, and the pressure roller 31211 near the downstream end of the pressure roller combination 3120 is the finishing pressure roller 3121B; the pressure roller assembly in the pressure roller combination 3120 is configured so that the downward pressure F1 of the preliminary pressure roller 3121A is greater than the downward pressure F2 of the finishing pressure roller 3121B. When it is set to F1>F2, when all the composite materials arrive at the preliminary pressing roller 3121A for compounding, the preliminary pressing roller 3121A provides a strong pressing pressure, so as to tightly press the composite layer in the initial bonding state, and keep the composite materials in the pressing area fully stretched, and squeeze out the gaps or bubbles that may exist in the composite interface to the upstream input side, so as to ensure that the composite interface of the composite layer passing through the preliminary pressing roller 3121A is completely bonded, and basically does not contain obvious bubbles, gaps, etc., thereby improving the composite quality; and the finishing pressing roller 3121B provides a pressing pressure of F2 which is less than F1, which can avoid The strong tension on both the front and rear sides of the composite layer causes excessive stretching, preventing wrinkles caused by elastic contraction after passing through the lamination zone. At the same time, the composite layer may still have minimal air gaps at the microscopic level that have little impact on the composite layer's performance after passing through the initial lamination roller 3121A. If the final lamination roller 3121B also maintains strong lamination pressure, this air gap may be squeezed upstream, that is, between the initial lamination roller 3121A and the final lamination roller 3121B. As the production process progresses, this air gap will continue to accumulate in multiple areas of the finished composite layer, forming noticeable bubbles or wrinkles, which will significantly affect the quality of the final product. Furthermore, setting F2 < F1 also facilitates the decoupling and separation of the composite layer. The final lamination roller 3121B has a lower lamination pressure than the upstream roller, which helps reduce the degree of adhesion of the foil layer to the corresponding abutting roller 4100, facilitating the separation of the laminated foil from the corresponding roller along the transmission direction. If F2 is a strong pressing force, the foil may easily stick to the corresponding abutting roller 4100 as the material moves. As the material is transported, uneven force may cause the composite layer to tear during delivery. The pressure mentioned above includes the pressure applied perpendicularly by the corresponding pressing roller 31211 against the surface of the abutting roller 4100.
[0040] To further improve the compounding effect, the press roller assembly 3120 includes more than three press rollers 31211, including a preliminary pressing roller 3121A, a finishing pressing roller 3121B, and more than one intermediate pressing roller 3121C located between the preliminary pressing roller 3121A and the finishing pressing roller 3121B; the pressing pressure F1 of the preliminary pressing roller 3121A in the press roller assembly 3120 is configured to be greater than the pressing pressure F2 of the finishing pressing roller 3121B, and the pressing pressure F1 of the preliminary pressing roller 3121A is greater than the pressing pressure F3 of the intermediate pressing roller 3121C. Further, F3≥F2. More specifically, the press roller assembly 3120 is configured such that F1>F3>F2, and the pressing pressure decreases in the direction from preliminary pressing to finishing pressing, with the decreasing ratio ranging from 3% to 20%; that is, F1×3%<F1 - F3<F1×20%, F3×3%<F3 - F2<F3×20%. More specifically, the decreasing ratio ranges from 5% to 15%, F1×5%<F1 - F3<F1×15%, F, 3×5%<F3 - F2<F3×15%. Further, the magnitudes of F1, F2, and F3 are in the range of 0.1 N / in to 10 N / in (0.1 N per inch to 10 N per inch). Further, the diameter of the press roller 31211 in the press roller assembly 3120 ranges from 120 to 200 mm.
[0041] The initial pressing roller 3121A applies a relatively large pressing pressure at the initial stage of lamination, causing the lower pressing area to be stressed concentratedly so as to fully laminate while preventing air bubbles from entering. The finishing pressing roller 3121B assists in laminating the composite layer to enhance the bonding strength. The finishing pressing roller 3121B not only extends the lamination area of the composite layer during travel, but also can slowly release the composite foil 5300, thereby promoting it to separate from the abutting roller body 4100 and be led out. The transition pressing roller 3121C can at least also play the role of assisting the finishing pressing of the finishing pressing roller 3121B. Preferably, its lower pressing pressure F3 is also less than F1. And as the intermediate transition pressing roller 3121C, it can increase the auxiliary pressing area and further improve the lamination effect. Combining F3 less than F1, thus cooperating with the initial pressing roller 3121A and the finishing pressing roller 3121B to achieve a progressive slowdown in pressing and release. It provides a more diverse adjustment process, facilitating selective adjustment in accordance with the material characteristics and lamination requirements. And the surface hardness H1 of the initial pressing roller 3121A > the surface hardness H2 of the finishing pressing roller 3121B; the surface hardness H1 of the initial pressing roller 3121A > the surface hardness H3 of the transition pressing roller 3121C. Further, H3≥H2; further, H1≥45 degrees; furthermore, H1>H3>H2. And the range of H1 is 45 - 55 degrees; the range of H3 is 35 - 45 degrees; the range of H2 is 25 - 35 degrees. The surface hardness of the roller includes the surface rubber hardness of the roller body, which is Shore A hardness; the acting areas corresponding to different surface hardnesses of the rollers are different, and setting them as the aforementioned H1, H3, and H2 can further significantly improve the lamination effect. The diameter D1 of the initial pressing roller 3121A < the diameter D2 of the finishing pressing roller 3121B. When there is a transition pressing roller 3121C, the diameter D1 of the initial pressing roller 3121A ≤ the diameter D3 of the transition pressing roller 3121C, and the diameter D3 of the transition pressing roller 3121C ≤ the diameter D2 of the finishing pressing roller 3121B; the range of D1 is 120 - 180 mm; the range of D2 is 180 - 200 mm; the range of D3 is 120 - 200 mm. Or, the diameter D1 of the initial pressing roller 3121A > the diameter D3 of the transition pressing roller 3121C. Example 2
[0042] This embodiment discloses a production system 1000 for a composite foil 5300. The difference between this embodiment and Embodiment 1 lies in: the substrate lamination subsystem 1100 laminates the adhesive material layer 5120 on one side of the substrate layer 5110, and then coats a glue solution on the opposite side of the substrate layer 5110 where the adhesive material layer 5120 has been laminated to form a glue layer 5121. That is, the substrate lamination subsystem 1100 first laminates the adhesive material layer 5120 on one side of the substrate layer 5110, and then forms the glue layer 5121 by coating the glue solution on the other surface of the substrate layer 5110.
[0043] As Figure 7As shown, in the composite foil 5300 production system 1000 of this embodiment, the substrate composite subsystem 1100 includes a substrate transmission mechanism 1110, a viscous material transmission mechanism 1120, a pressing assembly 1130, a second coating device 1310, and a second pre-curing device 1320. The substrate transmission mechanism 1110 drives the substrate layer 5110 towards the pressing assembly 1130, with the side of the adhesive layer 5121 facing the substrate layer 5110. The pressing assembly 1130 presses one side of the substrate layer 5110 and the viscous material layer 5120 together. The second coating device 1310 receives the substrate layer 5110 that has passed through the pressing assembly 1130 and coats the side of the substrate layer 5110 that has not been pressed with the viscous material layer 5120 with a glue solution. The second pre-curing device 1320 pre-cures the coated glue solution so that both sides of the substrate layer 5110 have the adhesive layer 5121. In the substrate composite subsystem 1100 of this embodiment, a second peelable layer unwinding mechanism may also be included to facilitate covering the peelable layer 5122 on the formed adhesive layer 5121.
[0044] Then, based on the same peeling assembly 2100 and foil composite subsystem 3000 as in the foregoing Embodiment 1, the foil is laminated on both sides of the substrate layer 5110 to obtain the corresponding composite foil 5300. Embodiment 3
[0045] This embodiment discloses a method for producing a composite foil 5300, including the steps of:
[0046] S1. Laminating the substrate layer 5110 and the viscous material layer 5120 to obtain the laminated substrate layer 5100; the viscous material layer 5120 includes a peelable layer 5122 and an adhesive layer 5121 on one side of the peelable layer 5122, and in the laminated substrate layer 5100, the peelable layer 5122 is located on the side away from the substrate layer 5110;
[0047] S2. Before laminating with the foil layer 5200, peeling off the peelable layer 5122 on the side to be laminated of the laminated substrate layer 5100 to expose the corresponding side adhesive layer 5121;
[0048] S3. Pressing the substrate layer 5110 carrying the adhesive layer 5121 onto the foil layer 5200, and laminating the substrate layer 5110 and the foil layer 5200 through the adhesive layer 5121 to obtain the composite foil 5300.
[0049] Among them, before step S1, there is also step S0 of unwinding the peelable layer 5122 and coating the glue solution on the peelable layer 5122; after coating the glue solution on the peelable layer 5122, a pre-curing treatment is also performed.
[0050] In the specific implementation process, according to the actual production configuration, the production process of the integral composite foil 5300 can be achieved by the following multiple methods: in step S1, both sides of the substrate layer 5110 are composited with the adhesive material layer 5120, and steps S2 and S3 are used to composite the foil layer 5200 on both sides of the substrate layer 5110; or, in step S1, both sides of the substrate layer 5110 are composited with the adhesive material layer 5120, and steps S2 and S3 are used to composite the foil layer 5200 on one side of the substrate layer 5110, and step S4 is further included: repeating steps S2 and S3 is used to composite the foil layers on both sides of the substrate; or, in step S1, one side of the substrate layer 5110 is composited with the adhesive material layer 5120, and steps S2 and S3 are used to composite the foil layer 5200 on one side of the substrate layer 5110, and step S4 is further included: repeating steps S1 and S3 is used to composite the foil layers on both sides of the substrate. Example 4
[0051] This embodiment discloses a method for producing a composite foil 5300. In this embodiment, both sides of a composite substrate layer 5100 are provided with adhesive layers 5121. This differs from Example 3 in that, in step S1, one side of a substrate layer 5110 is composited with an adhesive layer 5120, and adhesive is applied to the other side of the substrate layer 5110 to form the adhesive layer 5121, thereby obtaining the composite substrate layer 5100. Then, steps S2 and S3 are performed to composite the foil layers 5200 on both sides of the substrate layer 5110. Example 5
[0052] This embodiment discloses a composite foil 5300 produced using the aforementioned method for producing composite foil 5300. The composite foil 5300 produced using the method for producing composite foil 5300 of this application achieves a tight bond between the substrate layer 5110 and the foil layer 5200 via the adhesive layer 5121, improving the unstable bonding condition typically associated with poor adhesion of the substrate layer 5110. This also facilitates the use of a thinner substrate layer 5110 and a wider variety of substrate layer materials, providing composite foils 5300 with improved performance and greater diversity. Example 6
[0053] This embodiment discloses the application of the aforementioned composite foil production system 1000 and / or the aforementioned composite foil production method in the production of a composite current collector. The aforementioned composite foil production system 1000 and composite foil production method facilitate the production of a higher-quality composite current collector, further facilitates lightweighting the composite current collector, expands the selection of materials for the composite current collector substrate layer 5110, and thereby produces a composite current collector more suitable for use with new energy batteries and the like.
[0054] Obviously, the above embodiments of the present utility model are merely examples for clearly explaining the technical solutions of the present utility model, rather than limitations on the specific implementation manners of the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the claims of the present utility model shall be included within the protection scope of the claims of the present utility model.
Claims
1. A composite material production system, the composite material comprising a base material layer, an adhesive layer and a functional layer, characterized in that Comprising, arranged in sequence from upstream to downstream: A substrate composite subsystem for laminating an adhesive material layer onto at least one side of a substrate layer to obtain a laminated substrate layer; the adhesive material layer includes an adhesive layer and a peelable layer on one side of the adhesive layer, and after lamination, the peelable layer is located on the side away from the substrate layer; A peeling assembly for peeling the peelable layer on the corresponding side before the substrate layer is laminated with the functional layer through the adhesive layer; A functional layer composite subsystem for pressing the substrate layer to laminate it with the functional layer through the exposed adhesive layer and guiding away the obtained composite material.
2. A composite material production system according to claim 1, characterized in that, The substrate composite subsystem includes: a substrate transmission mechanism, an adhesive material transmission mechanism, and a pressing assembly; the substrate transmission mechanism drives the substrate layer towards the pressing assembly; the adhesive material transmission mechanism is eccentrically arranged relative to the substrate transmission mechanism to drive the adhesive material layer towards the pressing assembly, and the adhesive layer side faces the substrate layer; the pressing assembly laminates the substrate layer and the adhesive material layer.
3. A composite material production system according to claim 2, characterized in that, It includes two adhesive material transmission mechanisms, respectively located on both sides of the substrate transmission mechanism, and both make the adhesive layer side of the adhesive material layer face the substrate; the pressing assembly laminates both sides of the substrate layer with the corresponding side adhesive material layer.
4. A composite material production system according to claim 2, characterized in that, The substrate composite subsystem further includes a first peelable layer unwinding device, a first coating device, and a first pre-curing device arranged upstream of the adhesive material transmission mechanism. The first peelable layer unwinding device unwinds the peelable layer, the first coating device coats adhesive liquid on the peelable layer, and the first pre-curing device pre-cures the coated adhesive liquid to obtain an adhesive material layer having an adhesive layer and a peelable layer.
5. The composite material production system according to claim 1, characterized in that, The substrate composite subsystem includes a substrate transmission mechanism, an adhesive material transmission mechanism, a pressing assembly, a second coating device, and a second pre-curing device; the substrate transmission mechanism drives the substrate layer towards the pressing assembly, and the adhesive layer side faces the substrate layer; the pressing assembly laminates one side of the substrate layer with the adhesive material layer; the second coating device receives the substrate layer passing through the pressing assembly and coats adhesive liquid on the side of the substrate layer that is not laminated with the adhesive material layer; the second pre-curing device pre-cures the coated adhesive liquid; so that both sides of the substrate layer have an adhesive layer.
6. A composite material production system according to any one of claims 1 to 5, characterized in that, The peelable layer includes a release film; and / or, the functional layer includes a foil layer; and / or, the substrate layer includes a PET film, a PP film, and a PI film.
7. A composite material production system according to any one of claims 1 to 5, characterized in that, The functional layer composite subsystem includes a combination of pressing rollers, a supporting roller body, and a guiding roller. The combination of pressing rollers is formed by two or more pressing roller assemblies. Each pressing roller assembly includes a pressing roller and a telescopic mechanism connected to the pressing roller; the combination of pressing rollers at least drives and carries the substrate layer with the adhesive layer; the surface of the supporting roller body carries the functional layer; the combination of pressing rollers and the surface of the supporting roller body are configured to jointly laminate the substrate layer with the adhesive layer and the functional layer to obtain a composite material; the guiding roller is used to pull the composite material away from the surface of the supporting roller body; when the combination of pressing rollers cooperates with the supporting roller body, the pressing roller assembly is configured to make the corresponding pressing roller cooperate with the surface of the supporting roller body to provide a pressing space, and the pressing rollers in the combination of pressing rollers are arranged along the circumferential direction of the supporting roller body.
8. A composite material production system according to claim 7, characterized in that, Among the press roller combinations, the press roller near the upstream end is the preliminary pressing roller, and the press roller near the downstream end is the finishing pressing roller; in the press roller combination, the pressing pressure F1 of the preliminary pressing roller is greater than the pressing pressure F2 of the finishing pressing roller.
9. A composite material production system according to claim 7, wherein The abutting roller body is a cathode roller.
10. A composite material production system according to any one of claims 1 to 5, characterized in that, The composite material includes a composite current collector.