Composite members and apparatuses

Abstract

This invention achieves uniform heat distribution and low cost, and more reliably suppresses shape changes during manufacturing and use. The composite component involved in this invention comprises an aluminum plate, a steel plate, and a resin layer sandwiched between the aluminum plate and the steel plate, wherein the thickness t of the aluminum plate is... A The thickness t of the steel plate is 0.20–1.60 mm. B The thickness t of the composite component is 0.15–1.20 mm. T The thickness t of the aluminum plate is 1.50–5.00 mm. A The thickness t of the steel plate is greater than or equal to B .

Description

Technical Field

[0001] This invention relates to composite components and devices. Background Technology

[0002] In recent years, the market share of organic EL displays has increased. Organic EL displays utilize the light-emitting material contained in organic EL elements, which emits light when excited by energy and then returns to its ground state. When the temperature of the organic EL element changes, the color of the emitted light changes due to the change in the band gap of the light-emitting material. To prevent this change in color, the in-plane heat uniformity of the organic EL display panel, which is an assembly of organic EL elements, becomes important. To achieve such heat uniformity, aluminum is often attached to the organic EL display panel in most organic EL displays (for example, see Patent Document 1 below). However, aluminum alone lacks rigidity; therefore, in recent years, laminated components with a raw material structure of aluminum / resin / aluminum have been attached to the organic EL display panel.

[0003] Such laminated components require excellent surface flatness because an organic EL display panel is attached to one side. Furthermore, from a life-cycle assessment perspective, lightweighting is necessary to reduce carbon dioxide emissions during transportation. A key indicator of this is specific stiffness (stiffness per unit mass). Moreover, with increasing market competition in organic EL displays, there is a growing trend towards cost reduction in the components constituting these displays.

[0004] Here, since aluminum is an expensive metal, in order to reduce the cost of the component, it is advisable to reduce the amount of aluminum used while maintaining rigidity. Therefore, it is possible to use iron, a metal that is rigid and cheaper than aluminum, to replace a portion of the aluminum, thus realizing a laminated component made of raw materials such as aluminum / resin / iron. As a laminated component made of such raw materials, for example, Patent Document 2 discloses a laminated component with a structure of metal material / resin / metal material. Examples of metal materials include aluminum, steel, and plated steel sheets. Furthermore, for example, Patent Document 3 discloses a laminated steel sheet for a reflector with a structure of aluminum foil / resin / steel sheet.

[0005] Existing technical documents

[0006] Patent documents

[0007] Patent Document 1: Japanese Patent Application Publication No. 9-314734

[0008] Patent Document 2: US Patent No. 4,313,996

[0009] Patent Document 3: Japanese Patent Application Publication No. 58-31745 Summary of the Invention

[0010] The problem the invention aims to solve

[0011] In Patent Document 2 mentioned above, various materials are exemplified as metallic materials, and combinations such as aluminum / resin / iron can also be considered. However, this document only specifically studies combinations of the same type of metallic materials; combinations of different types of metallic materials are merely examples.

[0012] Furthermore, since the laminated steel plate disclosed in Patent Document 3 is a steel plate for a reflector, aluminum foil is used to ensure suitable optical properties. However, the laminated member described above is not only exposed to the heat emitted by devices that generate heat during operation, such as organic EL display panels, but also requires heat uniformity. In this case, since the laminated member needs to have a specified amount of heat conduction, the aluminum foil used in Patent Document 3, due to its small thickness, is difficult to achieve the desired heat conduction. From this point of view, the inventors have found that it is important to increase the thickness of the aluminum used for the laminated member to some extent.

[0013] On the other hand, the aluminum and iron (steel plate) that make up the laminated components have different coefficients of linear expansion. The coefficient of linear expansion of aluminum is 23.0 × 10⁻⁶. -6 The coefficient of linear expansion (°C) is greater than that of iron (12.1 × 10⁻⁶). -6 / ℃ (i.e., aluminum expands more easily). In the case of aluminum foil as described in Patent Document 1, since the thickness of aluminum is very thin compared to the thickness of the steel plate, the difference in the coefficient of linear expansion described above can be disregarded. However, as the inventors know, by increasing the thickness of the aluminum, the difference in the coefficient of linear expansion described above will have a significant impact. If these raw materials are exposed to heat during the manufacture or use of the laminated component, shape changes (more specifically, warping) will occur due to the difference in the coefficient of linear expansion. More specifically, shape changes occur during manufacture due to the heat of the resin in a molten state, and during use, shape changes occur due to heat transfer from the device that generates heat during operation.

[0014] As mentioned above, the uniformity of heat distribution in a component is inversely related to the suppression of shape changes during manufacturing and use. Therefore, the inventors have recently discovered that, while achieving uniform heat distribution and low cost in a component, there is a need for a technology that can more reliably suppress shape changes during manufacturing and use, and further improve the flatness of the component.

[0015] Furthermore, when fixing components to devices that generate heat during operation, screws or other fixing mechanisms are mostly used. However, the components are generally processed by deep drawing or other machining processes to prevent the heads of the screws or other fixing mechanisms from protruding from the surface of the component. Therefore, in addition to the above characteristics, the component also needs to be machinable.

[0016] Therefore, the present invention was made in view of the above-mentioned problems, and the object of the present invention is to provide a composite component and device that can achieve processability, uniform heating and low cost, and can more reliably suppress shape changes during manufacturing and use, and further improve the flatness of the component.

[0017] Solution for solving the problem

[0018] In order to solve the above-mentioned problems, the inventors conducted in-depth research and came to the conclusion that by making the thickness of the aluminum plate and the steel plate meet specific conditions, it is possible to balance the heat uniformity and the suppression of shape changes that are in opposite directions, as mentioned above, and thus the present invention was completed.

[0019] The main points of the present invention, based on this insight, are as follows.

[0020] (1) A composite component comprising an aluminum plate, a steel plate, and a resin layer sandwiched between the aluminum plate and the steel plate, wherein the thickness of the aluminum plate is t A The thickness t of the steel plate is 0.20–1.60 mm. B The thickness t of the composite component is 0.15–1.20 mm. T The thickness t of the aluminum plate is 1.50–5.00 mm. A The thickness t of the steel plate is greater than or equal to B .

[0021] (2) The composite component according to (1) or (2), wherein the maximum deformation of the flatness of the composite component in any direction is less than 3.0 mm.

[0022] (3) The composite component according to (1) or (2), wherein the maximum deformation of the flatness of the composite component in any direction is less than 2.0 mm.

[0023] (4) The composite component according to any one of (1) to (3), wherein the thickness t of the aluminum plate A Relative to the thickness t of the steel plate B The ratio t A / t B The value ranges from 1.10 to 3.30.

[0024] (5) The composite component according to any one of (1) to (4), wherein the thickness t of the aluminum plate A The thickness t of the steel plate B and the overall thickness t of the composite component T Satisfy (t) A +t B ) / t TA relationship ≤0.65.

[0025] (6) The composite component according to any one of (1) to (5), wherein the resin layer comprises polyethylene resin or epoxy resin.

[0026] (7) The composite component according to any one of (1) to (6), wherein the glass transition temperature Tg of the resin contained in the resin layer is below 0°C or 50 to 180°C.

[0027] (8) The composite component according to any one of (1) to (7), wherein the ratio of the dynamic energy storage modulus E' to the dynamic loss modulus E” of the resin contained in the resin layer at 100°C is 0.20 to 20.0.

[0028] (9) The composite component according to any one of (1) to (8), wherein an adhesive layer is further provided between the resin layer and the aluminum plate or between the resin layer and the steel plate at least one of the locations.

[0029] (10) The composite component according to any one of (1) to (9), wherein the steel plate has a plating layer on at least one side and a coating layer on the plating layer.

[0030] (11) An apparatus comprising: a composite component as described in any one of (1) to (10), and a device that generates heat during operation and is located on the surface of the aluminum plate side of the composite component in at least partial contact.

[0031] (12) The device according to (11), wherein the device that generates heat during operation is an organic EL display panel, and the device is an organic EL display.

[0032] The effects of the invention

[0033] As described above, according to the present invention, processability, heat uniformity and low cost can be achieved, and shape changes during manufacturing and use can be suppressed more reliably, further improving the flatness of the component. Attached Figure Description

[0034] Figure 1A An explanatory diagram illustrating an example of a composite component according to an embodiment of the present invention.

[0035] Figure 1B An explanatory diagram illustrating an example of a composite component involved in this embodiment.

[0036] Figure 1C An explanatory diagram illustrating an example of a composite component involved in this embodiment.

[0037] Figure 1D An explanatory diagram illustrating an example of a composite component involved in this embodiment.

[0038] Figure 2A An explanatory diagram illustrating an example of a steel plate in a composite component according to this embodiment.

[0039] Figure 2B An explanatory diagram illustrating an example of a steel plate in a composite component according to this embodiment.

[0040] Figure 3 This diagram illustrates an example of the process flow of a method for manufacturing a composite component according to this embodiment.

[0041] Figure 4 An explanatory diagram illustrating the structure of a device using the composite component described in this embodiment.

[0042] Figure 5 This is a schematic diagram illustrating the method for measuring shape changes during use. Detailed Implementation

[0043] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that in this specification and the accompanying drawings, constituent elements having substantially the same functional structure are omitted from repeated description by using the same reference numerals.

[0044] (Regarding composite components)

[0045] <Regarding the overall composition of composite components>

[0046] First, refer to Figures 1A to 1D The overall structure of the composite component involved in the embodiments of the present invention will be described. Figures 1A to 1D This is an explanatory diagram illustrating an example of the composite component involved in this embodiment. It should be noted that... Figures 1A to 1D In order to facilitate explanation, the figures are appropriately enlarged or reduced, and the figures do not represent the actual size and ratio of each part.

[0047] like Figure 1A As shown, the composite component 1 of this embodiment includes an aluminum plate 10, a steel plate 20, and a resin layer 30 sandwiched between the aluminum plate 10 and the steel plate 20. Therefore, the composite component 1 can be referred to as an aluminum-resin-steel (or iron) laminate (or composite board).

[0048] Aluminum plate 10 is not particularly limited except for the thickness-related conditions described below, and various types of aluminum plates can be used. Here, the aluminum plate can be made of pure Al or various aluminum alloys. Furthermore, the shape of aluminum plate 10 is not particularly limited and can be appropriately determined according to the object using composite component 1.

[0049] It should be noted that the conditions related to the thickness of aluminum plate 10 will be explained again below.

[0050] The steel plate 20 is not particularly limited except for the thickness-related conditions described below, and various steel plates can be used depending on the required mechanical strength of the steel plate 20. Examples of such steel plates 20 include Al-killed steel, extremely low-carbon steel containing Ti, Nb, etc., and high-strength steel further containing strengthening elements such as P, Si, Mn, etc. Furthermore, various alloy steel plates such as stainless steel plates can also be used as the steel plate 20. Moreover, the shape of the steel plate 20 is not particularly limited and can be appropriately set according to the object using the composite component 1.

[0051] It should be noted that the various conditions, represented by the thickness of steel plate 20, will be explained again below.

[0052] The resin layer 30 is located between the aluminum plate 10 and the steel plate 20. As mentioned above, the coefficients of linear expansion of the aluminum plate 10 and the steel plate 20 are significantly different. Due to this difference in coefficients of linear expansion, shape changes caused by heat can occur during the manufacturing and use of the composite component 1. However, as detailed below, the aluminum plate 10 and the steel plate 20 have specific thicknesses, and a resin layer 30 of suitable thickness exists between the aluminum plate 10 and the steel plate 20, thereby mitigating the difference in the coefficients of linear expansion between the aluminum plate 10 and the steel plate 20 and suppressing the occurrence of shape changes.

[0053] It should be noted that the requirements for the resin layer 30 will be described in detail below.

[0054] Furthermore, the composite component 1 involved in this embodiment is as follows: Figures 1B to 1D As shown, an adhesive layer 40 may also be provided at least at either the resin layer 30 and the aluminum plate 10, or the resin layer 30 and the steel plate 20. By further providing this adhesive layer 40, the adhesion between the resin layer 30 and the aluminum plate 10, or between the resin layer 30 and the steel plate 20, can be further improved.

[0055] The adhesive layer 40 will be described again below.

[0056] <Regarding the thickness of each layer of composite component 1>

[0057] Next, the thickness of each layer constituting composite component 1 will be described in detail. In the following description, such as... Figures 1A to 1D As shown, the thickness of aluminum plate 10 is expressed as t. A The thickness of steel plate 20 is expressed as t. B The overall thickness of composite component 1 is expressed as t. T .

[0058] In the composite component 1 involved in this embodiment, the thickness t of the aluminum plate 10 is... A The thickness t of steel plate 20 is 0.20~1.60mm. B The thickness t of the composite component 1 is 0.15–1.20 mm. T The thickness is 1.50–5.00 mm, and the thickness t of the aluminum plate 10 is... A Thickness t of steel plate greater than or equal to 20 mm B By satisfying these four conditions, the composite component 1 involved in this embodiment can achieve uniform heat distribution and low cost, and more reliably suppress shape changes during manufacturing and use, further improving the flatness of the composite component.

[0059] The above conditions will be explained in more detail below.

[0060] [t A [0.20~1.60mm]

[0061] In the composite component 1 of this embodiment, the thickness t of the aluminum plate 10 is... A Set to 0.20~1.60mm. When the thickness t of aluminum plate 10 A When the thickness is less than 0.20 mm, the required thermal conductivity of the composite component 1 as a whole is insufficient, thus failing to achieve uniform heat distribution as a whole. This is addressed by adjusting the thickness t of the aluminum plate 10. A A thickness of 0.20 mm or greater is sufficient to achieve the heat uniformity required for composite component 1. The thickness t of aluminum plate 10... A Preferably, the thickness is 0.30 mm or more, more preferably 0.40 mm or more, and even more preferably 0.50 mm or more. On the other hand, when the thickness t of the aluminum plate 10 involved in this embodiment... A When the thickness exceeds 1.60mm, a large amount of aluminum, an expensive metal, is used, making it impossible to achieve low cost. By increasing the thickness t of the aluminum plate by 10... A Setting the thickness to below 1.60mm allows for achieving the desired heat uniformity while maintaining low cost. The thickness t of aluminum plate 10... A Preferably, it is 1.20 mm or less, and more preferably 1.00 mm or less.

[0062] [t B [0.15~1.20mm]

[0063] In the composite component 1 of this embodiment, the thickness t of the steel plate 20B Set to 0.15~1.20mm. When the thickness t of the steel plate 20 is... B When the thickness is less than 0.15 mm, the rigidity required for the composite component 1 as a whole cannot be achieved. This is because the thickness t of the steel plate 20... B A thickness of 0.15mm or greater is sufficient to achieve the rigidity required for the composite component 1 as a whole. The thickness t of the steel plate 20... B Preferably, the thickness is 0.20 mm or more, more preferably 0.30 mm or more, and even more preferably 0.40 mm or more. On the other hand, when the thickness t of the steel plate 20... B When the thickness exceeds 1.20 mm, as will be discussed later, the aluminum plate thickness must also be increased. As a result, the strength of the composite component increases, but its press workability decreases. By increasing the thickness t of the steel plate to 20 mm... B Setting the thickness to below 1.20mm balances heat dissipation, rigidity, and press workability. The thickness t of steel plate 20... B Preferably, the thickness is 1.00 mm or less, more preferably 0.80 mm or less, and even more preferably 0.60 mm or less. It should be noted that, when using steel plates 20 that have plating or coating layers on the surface of the base steel plate as described below, the overall thickness including these plating or coating layers is defined as the thickness t of the steel plate 20. B .

[0064] [t A ≥t B ]

[0065] In the composite component 1 of this embodiment, the thickness t of the aluminum plate 10 is... A And the thickness t of steel plate 20 B Based on the above-mentioned range, the thickness t of the aluminum plate 10 is further... A Let the thickness t be greater than or equal to 20 mm of steel plate. B When the thickness t of the aluminum plate is increased by 10... A At that time, the warping caused by the difference in the coefficients of linear expansion between the aluminum plate 10 and the steel plate 20 increases. On the other hand, by increasing the thickness t of the aluminum plate 10... A As a result, the rigidity of composite component 1 increases. Consequently, the warping caused by the difference in linear expansion coefficients decreases. When the thickness t of aluminum plate 10... A Thickness t less than 20 mm of steel plate B At that time, the influence of the steel plate 20 with its large coefficient of linear expansion was strong, and even with the resin layer 30, it was impossible to suppress the shape changes caused by heat during manufacturing and use. The thickness t of the aluminum plate 10... A Thickness t of steel plate greater than or equal to 20 mm BThe resin layer 30 can mitigate the difference in linear expansion coefficients between aluminum and iron, thus more reliably suppressing shape changes caused by heat during manufacturing and use, further improving the flatness of the composite component. More preferably, the thickness t of the aluminum plate 10... A Thickness t of steel plate 20 B Thickness (i.e., t) A >t B ).

[0066] [t T [1.50~5.00mm]

[0067] In the composite component 1 of this embodiment, the overall thickness t of the composite component 1 is... T Set to 1.50~5.00mm. When the overall thickness t of composite component 1... T When the thickness is less than 1.50 mm, it is impossible to further improve the flatness of the composite component while simultaneously ensuring uniform heat distribution and suppressing shape changes. This is achieved by increasing the overall thickness t of the composite component 1. T Setting the thickness to 1.50 mm or more can further improve the flatness of the composite component while taking into account both heat uniformity and suppression of shape changes. The overall thickness t of composite material 1... T Preferably, the thickness is 2.00 mm or more, more preferably 2.50 mm or more, and even more preferably 3.00 mm or more. On the other hand, when the overall thickness t of the composite member 1... T When the thickness exceeds 5.00 mm, the required machinability of composite component 1 cannot be achieved. Composite component 1 is used by joining other components through mechanical fastening mechanisms such as screws. In this case, shallow drawing is mostly performed to prevent the heads of screws, etc., from protruding from the surface of composite component 1. When the overall thickness t T When the thickness exceeds 5.00 mm, the aforementioned shallow drawing process becomes difficult. This is achieved by adjusting the overall thickness t of the composite component 1. T Setting the thickness to below 5.00 mm balances thermal and processability. The overall thickness t of composite material 1... T Preferably, it is 4.50 mm or less, and more preferably 4.00 mm or less.

[0068] It should be noted that the overall thickness t of the composite component 1 involved in this embodiment is... T Subtract the thickness t of the aluminum plate by 10 A And the thickness t of steel plate 20 B The sum of the thickness of the resin layer 30 and the thickness of the adhesive layer 40 is obtained.

[0069] [ratio t] A / t B [1.10~3.30]

[0070] In the composite component 1 of this embodiment, the thickness t of the aluminum plate 10 is... A The thickness t of the steel plate 20 B The ratio t A / t B Preferably, it is 1.10 to 3.30. The ratio t A / t B With a value of 1.10–3.30, it is possible to further improve the flatness of the composite component while more reliably balancing heat uniformity and suppression of shape changes. Ratio t A / t B The lower limit is more preferably 1.20, further preferably 1.30, and even more preferably 1.40. Additionally, the ratio t... A / t B The upper limit is more preferably 3.00, further preferably 2.50, even more preferably 2.00, and particularly preferably 1.70.

[0071] [(t A +t B ) / t T ≤0.65]

[0072] In the composite component 1 of this embodiment, the thickness t of the aluminum plate 10 is preferably [missing information]. A The thickness t of steel plate 20 B The overall thickness t of composite component 1 T Satisfy (t) A +t B ) / t T The relationship is ≤0.65. This is achieved by satisfying (t) A +t B ) / t T A relationship of ≤0.65 can further improve the flatness of the composite component while more reliably balancing heat uniformity and suppression of shape changes. (t) A +t B ) / t T The value is more preferably 0.60 or less, further preferably 0.50 or less, even more preferably 0.40 or less, and particularly preferably 0.35 or less. No special specification is required (t). A +t B ) / t T The lower limit of the value, but can be set to 0.10, 0.15, 0.20 or 0.28.

[0073] [Methods for measuring thickness]

[0074] Here, the thickness of each layer constituting the composite component 1 (e.g., the thickness t of the aluminum plate 10) is... A The thickness t of steel plate 20 BOverall thickness t T The thickness of the resin layer 30, etc., can be measured using various known methods.

[0075] For example, in the case of post-hoc measurement of the thickness of the aluminum plate 10, the composite component 1 is embedded in a thermosetting resin such as epoxy resin. Using a precision cutting machine, the sample is cut parallel to the thickness direction at the area to be observed to expose the cross-section. The obtained cross-section is observed using an optical microscope. The shortest distance (i.e., the distance measured in the direction perpendicular to the interface) from multiple arbitrary locations (e.g., 5 locations) on the interface between the embedded resin and the aluminum plate 10 to the interface between the aluminum plate 10 and the resin layer 30 is measured, and the measured values ​​are averaged. The average thickness of the aluminum plate 10 obtained in this way can be used as the thickness t of the aluminum plate 10. A .

[0076] In addition, the thickness of other layers of the composite component 1 involved in this embodiment can also be measured in the same way as described above.

[0077] <Regarding the layer composition of steel plate 20>

[0078] Figure 2A and Figure 2B An explanatory diagram illustrating an example of the structure of the steel plate 20 according to this embodiment.

[0079] As described above, various steel plates and alloy steel plates can be used as the steel plate 20 involved in this embodiment. However, surface-treated steel plates that have undergone various surface treatments, such as various plating treatments, on the aforementioned steel plates can also be used as the steel plate 20.

[0080] Here, surface treatments can include, for example, various plating treatments such as galvanizing (hot-dip galvanized steel sheet, electro-galvanizing, etc.) and aluminizing, chemical conversion treatments such as chromate treatment and non-chromate treatment, and chemical surface roughening treatments such as physical or chemical etching such as sandblasting (which can also be understood as appearance processing treatments that add aesthetic appeal), but are not limited to these. Additionally, alloying of the plating and various other surface treatments can also be performed. As a surface treatment, treatments that at least impart rust resistance are preferred.

[0081] For example, the steel plate 20 involved in this embodiment is as follows: Figure 2A and Figure 2B As schematically shown, it may have a plating layer 203 on one or both sides of the base steel plate 201 and a coating layer 205 on the surface of the plating layer 203.

[0082] Here, coating 203 can include various coatings such as hot-dip galvanizing, zinc alloy plating, alloyed hot-dip galvanizing, electroplating, electroplating Zn-Ni, hot-dip Zn-Al alloy plating represented by hot-dip Zn-5%Al alloy plating and hot-dip 55%Al-Zn alloy plating, hot-dip Zn-Al-Mg alloy plating represented by hot-dip Zn-1~12%Al-1~4%Mg alloy plating and hot-dip 55%Al-Zn-0.1~3%Mg alloy plating, Ni plating, alloyed Ni plating, Al plating, tin plating, chromium plating, etc.

[0083] Among the above-mentioned coatings, zinc-based coatings containing Zn have excellent corrosion resistance, and therefore, coating 203 is particularly preferred.

[0084] Furthermore, the coating layer 205 may be, for example, a layer composed of various base coatings, various additives, etc. Figure 2A and Figure 2B In the figure, the coating layer 205 is a single-layer structure, but the coating layer 205 can also have a multi-layer structure composed of multiple layers.

[0085] There are no particular limitations on the base coating that can be contained in the coating layer 205; coatings containing various known resins can be used. Examples of such resins include polyacrylic resins, polyolefin resins, polyurethane resins, epoxy resins, polyester resins, polybutyral resins, melamine resins, silicone resins, fluoropolymers, and acrylic resins. These resins can be used directly or in combination. Furthermore, these resins can be cured using any curing agent. The coating can be used in any form, such as organic solvent-based, water-based, or powder-based.

[0086] Furthermore, various additives that can be included in the coating layer 205 according to this embodiment include, for example, various extender pigments, colorants, chemical conversion agents, rust inhibitors, surface-modified metal powders or glass powders, dispersants, leveling agents, antioxidants, defoamers, viscosity modifiers, ultraviolet absorbers, waxes, aggregates, fluoropolymer beads, and other additives, as well as diluents. It should be noted that fluoropolymer beads are spherical substances made of fluoropolymer resin, and by using fluoropolymer resin as a raw material, they possess lubricity, thus improving the scratch resistance of the coating. Here, when the coating layer 205 contains various extender pigments and colorants as additives, the appearance of the steel plate 20 can be improved, enabling it to function as an aesthetically pleasing steel plate. Therefore, when the composite component 1 according to this embodiment is used as an outer packaging material, it can be used as a material exhibiting excellent appearance even without further coating.

[0087] The components that the coating layer 205 according to this embodiment may contain have been described above by listing examples of coating compositions. Generally, when these coating compositions are applied to the plating layer 203, the composition of these components is usually different from that of the formed film. In the coating layer 205, due to reactions with the plating layer 203, volatilization of volatile components in the coating composition, etc., the composition of the coating composition differs from that of the applied coating layer 205, making it technically difficult to determine the composition of the formed coating layer 205. Furthermore, determining the composition of such a coating layer 205 through equipment analysis is technically difficult in practice. Therefore, in this embodiment, the formed coating layer 205 is determined by identifying the components that may be contained in the coating composition.

[0088] Furthermore, in the steel plate 20 of this embodiment, the surface of the plating layer 203 has a pattern, and the coating layer 205 may also have translucency that allows the pattern to be discerned through the coating layer 205. Here, the patterns on the surface of the plating layer 203 can be exemplified by glossy finishes such as polishing and mirror finishes, or pear-skin finishes such as hairline finishes, vibration finishes, sandblasting finishes, and matte finishes.

[0089] The steel plate 20 of this embodiment functions as an aesthetic steel plate by containing various additives as described above or forming patterns. Thus, when the composite component 1 of this embodiment is used as an outer packaging material, it can be used as a material that displays excellent appearance even without additional coating.

[0090] Here, the aforementioned coating 203 can be formed using various known plating methods, such as hot-dip plating or electroplating. Furthermore, the aforementioned coating layer 205 can be formed by applying the aforementioned coating material using conventional and known coating methods (e.g., roller coating, curtain coating, air spraying, airless spraying, dipping, bar coating, brush coating, etc.) and then allowing it to dry / cur.

[0091] <Regarding resin layer 30>

[0092] The resin layer 30 in this embodiment is provided to mitigate the difference in the coefficients of linear expansion between the aluminum plate 10 and the steel plate 20. The resin typically has a strength of several to tens of × 10⁻⁶. -5 With a linear expansion coefficient of approximately ℃, by sandwiching such a resin layer 30 between the aluminum plate 10 and the steel plate 20, the resin can follow the possible shape changes of the aluminum plate 10 and the steel plate 20, thus mitigating the possible shape changes.

[0093] The resin layer 30 preferably contains polyethylene resin (coefficient of linear expansion: 10~20×10). -5 / ℃) or epoxy resin (linear expansion coefficient: 4~6×10 -5The resin layer 30 contains at least one of polyethylene resin or epoxy resin, which more reliably mitigates potential shape changes.

[0094] Furthermore, the composite component 1 described in this embodiment can be considered for use in devices that generate heat during operation. However, in order for the resin layer 30 to function more reliably even under such heat conditions, the resin contained in the resin layer 30 is preferably a resin that does not have a glass transition temperature Tg within the temperature range in which the device is exposed. The device experiences repeated temperature fluctuations from room temperature to operating temperature. If a glass transition temperature Tg exists within this temperature range, the glass state and rubber state are repeated during each operation. This state change is accompanied by a change in the volume of the resin. Therefore, the repeated expansion and contraction of the volume of the composite component 1 may impair the durability of the composite material 1.

[0095] For example, considering applications in home appliances, primarily display devices such as organic EL displays, it is envisioned that the product temperature varies within the range of 0°C to 50°C. Therefore, the glass transition temperature Tg of the resin contained in the resin layer 30 is preferably below 0°C or between 50°C and 180°C, more preferably below -20°C or between 50°C and 140°C. In particular, the glass transition temperature Tg of the resin is most preferably between 50°C and 120°C or between 80°C and 120°C.

[0096] Here, the glass transition temperature of the resin can be determined using various known methods, such as by using differential scanning calorimetry (DSC) to measure the resin of interest.

[0097] Furthermore, in this embodiment, the ratio of the dynamic storage modulus E' to the dynamic loss modulus E" at 100°C, E' / E" of the resin contained in the resin layer 30, is preferably 0.20 to 20.0. Because the resin contained in the resin layer 30 possesses the viscoelastic properties described above, the resin can more reliably mitigate potential shape changes by following the possible shape changes of the aluminum plate 10 and the steel plate 20. The ratio of the dynamic storage modulus E' to the dynamic loss modulus E" at 100°C, E' / E", is more preferably 0.40 to 15.0.

[0098] Here, the ratio E' / E" of the aforementioned dynamic storage modulus E' to dynamic loss modulus E" can be confirmed based on the storage modulus E' and loss modulus E" obtained by performing a dynamic viscoelasticity measurement under the following conditions. That is, in this dynamic viscoelasticity measurement, the storage modulus E' and loss modulus E" are determined using a thermomechanical analysis apparatus. At this time, the storage modulus E' and loss modulus E" are measured in a nitrogen gas flow, in compression mode, at a temperature rise of 1 Hz and 1 °C / min, within a temperature range of 25–200 °C.

[0099] <Regarding adhesive layer 40>

[0100] The adhesive layer 40 involved in this embodiment is a layer provided as needed to further improve the adhesion between the resin layer 30 and the aluminum plate 10, or between the resin layer 30 and the steel plate 20.

[0101] The adhesive layer 40 is a layer mainly composed of components derived from the adhesive. The adhesive used to form the adhesive layer 40 is not particularly limited; for example, epoxy resin-based adhesives, polyester resin-based adhesives, urethane resin-based adhesives, or adhesives formed by mixing rubber or elastomers with these adhesives, or adhesives that impart conductivity, etc., can be used. From the viewpoint of initial adhesive strength, the adhesive layer 40 preferably comprises an epoxy resin-based adhesive or a urethane resin-based adhesive (i.e., a thermosetting adhesive).

[0102] Furthermore, the resin constituting the adhesive layer 40 preferably has a chemical structure common to the resin in the resin layer 30. This allows for better initial adhesion between the adhesive layer 40 and the resin layer 30, further improving the bonding strength of the composite component 1.

[0103] For example, the resin constituting the adhesive layer 40 may have a main backbone common to the resin in the resin layer 30. Alternatively, the resin constituting the adhesive layer 40 may also have side chain functional groups common to the resin in the resin layer 30.

[0104] The adhesive layer 40 described above can be formed by applying the adhesive as described above to the surface of the aluminum plate 10 or steel plate 20 using conventional and known coating methods (e.g., roller coating, curtain coating, air spraying, airless spraying, dipping, bar coating, brush coating, etc.), bonding it with the resin layer 30 or a resin composition that becomes the resin layer 30, and then drying / curing it.

[0105] <Regarding the flatness of composite component 1>

[0106] The composite component 1 of this embodiment maintains excellent flatness by having a specific resin layer 30 between an aluminum plate 10 and a steel plate 20 of a specific thickness, resulting in a balance between uniform heat distribution and suppression of shape deformation. The maximum flatness deformation of the composite component 1 of this embodiment is 3.0 mm or less. Here, maximum deformation refers to the maximum value obtained by subtracting the thickness of the composite component 1 from the deformation (height of the wave or warp) at any direction and position when the composite component 1 is placed on a flat plate. However, for composite components 1 with a wave spacing exceeding 1 m, it is applicable to any position with a length of 1 m. The maximum deformation is preferably 2.0 mm or less, more preferably 1.6 mm or less, further preferably 1.2 mm or less, and even more preferably 1.0 mm or less.

[0107] As described above, the flatness is achieved through a correction process performed at a specific time in the manufacturing method of the composite component 1 according to this embodiment.

[0108] <Regarding the application of composite component 1>

[0109] As described above, the composite component 1 of this embodiment can be used in devices that generate heat during operation. The composite component 1 of this embodiment can more reliably suppress shape changes caused by heat generated during manufacturing and use, and therefore, by using it in devices that generate heat during operation, its performance can be fully utilized.

[0110] Here, as components that generate heat during operation, examples include components used in home appliances, such as display panels, represented by organic EL display panels, or various battery units such as Li-ion battery units, fuel cell units, and solar cell units.

[0111] Above, refer to Figures 1A to 2B The composite component 1 involved in this embodiment will be described in detail.

[0112] (Regarding the manufacturing method of composite components)

[0113] Next, refer to Figure 3 The manufacturing method of the composite component 1 involved in this embodiment will be described. Figure 3 This is a flowchart illustrating an example of the manufacturing method of the composite component 1 according to this embodiment.

[0114] The manufacturing method of the composite component 1 involved in this embodiment is as follows: Figure 3The method shown includes an adhesive coating process (step S11), a lamination and pressing process (step S13), a straightening process (step S15), and a curing process (step S17). Here, the adhesive coating process (step S15) is a process performed as needed when forming the adhesive layer 40. In the manufacturing method of the composite component 1 according to this embodiment, the adhesive coating process (step S11) may not be required.

[0115] <Adhesive Coating Process>

[0116] The adhesive coating process (step S11) is a process of applying the adhesive as described above to the surface of at least one of the aluminum plate 10 or the steel plate 20. By providing this coating process, an adhesive layer 40 can be provided at at least one of the aluminum plate 10 and the resin layer 30 or the steel plate 20 and the resin layer 30 of the manufactured composite component 1.

[0117] The adhesive used here is as described above, and the coating method used is also as described above.

[0118] <Lamination and pressing process>

[0119] The lamination and pressing process (step S13) involves injecting a molten resin composition into the gap between the aluminum plate 10 and the steel plate 20, which are arranged separately from each other, thereby pressing the aluminum plate 10 and the steel plate 20 together. The resin composition injected here is as described above, so detailed descriptions are omitted below. Furthermore, if the steel plate 20 is a steel plate with a plating layer 203 and a coating layer 205 formed thereon, the plating layer 203 and the coating layer 205 are pre-formed on the base steel plate 201 before this lamination and pressing process. Known methods can be used for lamination and pressing. For example, a method in which the molten resin composition is injected while maintaining a predetermined gap between the aluminum plate 10 and the steel plate 20. Alternatively, a method can be used where a molten resin composition is pre-coated on the surface of the aluminum plate 10 or the steel plate 20, and then another metal plate is pressed onto it.

[0120] <Correction Process>

[0121] As described above, by injecting a molten resin composition into the gap between the aluminum plate 10 and the steel plate 20, and pressing the aluminum plate 10 and the steel plate 20 together, warping and other shape changes occur in the composite member 1 during the cooling process due to the heat contained in the resin composition and the difference in the coefficients of linear expansion between the aluminum plate 10 and the steel plate 20. Therefore, in the straightening process (step S15) according to this embodiment, the shape of the composite member 1 is straightened when the surface temperature of the composite member 1 is above and below the glass transition temperature of the resin contained in the resin composition. However, when the glass transition temperature of the resin contained in the resin composition is below 0°C, the shape of the composite member 1 is straightened within the range of room temperature and below 180°C.

[0122] Here, if the straightening process is performed when the surface temperature of the composite component 1 exceeds 180°C, the resin composition will generate excessive heat, and further warping will occur during the cooling process after straightening due to deformation caused by the difference in the coefficients of linear expansion between the aluminum plate 10 and the steel plate 20. Shape changes may occur again after the straightening process, which is undesirable. On the other hand, if the straightening process is performed when the surface temperature of the composite component 1 is lower than the glass transition temperature Tg of the resin, the glassy resin cannot adequately alleviate internal stress through straightening, and the flatness of the manufactured composite component 1 cannot be maintained. Therefore, the surface temperature of the composite component 1 needs to be set above the glass transition temperature Tg of the resin. Furthermore, during the cooling process after straightening, to reduce deformation caused by the difference in the coefficients of linear expansion between the aluminum plate 10 and the steel plate 20, straightening at a lower temperature is preferable. Therefore, to improve the flatness of the composite component 1 and prevent shape changes during equipment use, it is more preferable to use a resin with a glass transition temperature Tg of 50 to 120°C, and to perform straightening when the surface temperature of the composite component 1 is in the range of 120°C to 140°C.

[0123] For correcting shape changes such as warping on aluminum plate 10 and steel plate 20, a roller straightening machine with a processing degree of 5 or higher is preferred. Here, the maximum value of the curvature between each straightening roller constituting the roller straightening machine is defined as e (assuming the material to be straightened is flat), and the elastic limit curvature of the material to be straightened is defined as ey. The dimensionless quantity (e / ey) obtained by dividing the maximum value of curvature e by the elastic limit curvature ey is defined as the processing degree based on the roller straightening machine. As described above, by using a roller straightening machine to correct the shape changes of the composite component 1 caused by heat during manufacturing, better flatness can be achieved when manufacturing the composite component 1.

[0124] Furthermore, in the straightening process described above, processing conditions that can remove residual stress from the cutting process are preferred. That is, it is preferable to perform the cutting process immediately after the straightening process described above on the same manufacturing line. If straightening is performed after cutting, sufficient straightening deformation cannot be imparted to the top or bottom end during straightening, and there is a concern that the flatness of the top or bottom end may deteriorate, which is not preferred. In addition, if the straightening process is followed by winding, the shape will be bent due to winding, so it is not possible to wind it into a roll after straightening.

[0125] <Curing Process>

[0126] The curing process (step S17) is a process of curing the resin composition located between the aluminum plate 10 and the steel plate 20 to form a resin layer 30. Here, curing the resin composition means cooling the temperature of the resin composition to below its glass transition temperature Tg. Here, if the glass transition temperature Tg of the resin of interest is less than 0°C, the resin composition is cooled to a glass transition temperature Tg below 0°C. This produces a composite component 1 having a laminated structure of aluminum plate 10 / resin layer 30 / steel plate 20. Furthermore, if an adhesive is coated on the surfaces of the aluminum plate 10 and the steel plate 20, this curing process cures the adhesive, forming an adhesive layer 40. It should be noted that cooling the composite component 1 to below 0°C is cumbersome; a resin composition with a glass transition temperature Tg of 50°C or higher is preferred.

[0127] Here, when cooling / curing molten resin to form resin layer 30, it is preferable to control the cooling rate. If the cooling rate is high, a temperature distribution will occur in resin layer 30, which can cause deformation. That is, the cooling rate in the curing process of molten resin is preferably low, specifically, for example, preferably 5°C / min or less.

[0128] It should be noted that it is also possible to place weights (apply load) on the surface of at least one of the aluminum plate 10 or steel plate 20 after the lamination and pressing process, or to perform a straightening process and a curing process in a pressed state after the lamination and pressing process. However, the inventors have studied these processes and found that the desired flatness cannot be achieved in these processes.

[0129] Above, refer to Figure 3 The manufacturing method of the composite component 1 involved in this embodiment is described.

[0130] (Regarding the equipment using composite component 1)

[0131] By using the composite component 1 described above and the device that generates heat during operation, the following device can be realized.

[0132] That is, the device according to this embodiment has: a composite component 1 as described above, and a device that generates heat during operation and is located on the surface of the aluminum plate 10 side of the composite component 1 in at least a partial contact state.

[0133] Here, components that generate heat during operation can include, for example, components used in home appliances, such as display panels (e.g., organic EL display panels), or various battery units such as Li-ion battery units, fuel cell units, and solar cell units. For instance, by combining an organic EL display panel and composite component 1, a display device such as an organic EL display can be realized. Furthermore, by combining various battery units such as Li-ion battery units, fuel cell units, and solar cell units with composite component 1, various battery devices can be realized.

[0134] The following is for reference Figure 4 The following explanation will be based on an organic EL display achieved by combining composite component 1 and an organic EL display panel.

[0135] like Figure 4 As schematically shown, an organic EL display 500, as an example of a display device, has a composite component 1 and an organic EL display panel 3 according to this embodiment, and may also have an electronic substrate 5 for driving control of the organic EL display panel 3.

[0136] Here, organic EL display panel 3, as Figure 4 As shown, the electronic substrate 5 is disposed on at least a portion of the surface of the aluminum plate 10 side of the composite component 1, and the electronic substrate 5 is disposed on at least a portion of the surface of the steel plate 20 side of the composite component 1.

[0137] Here, by providing the organic EL display panel 3 on the aluminum plate 10 side of the composite member 1, the heat generated on the organic EL display panel 3 can be rapidly conducted using aluminum, which has high thermal conductivity. That is, since the composite member 1 involved in this embodiment has sufficient thermal conductivity, the heat uniformity within the display surface of the organic EL display panel 3 can be reliably guaranteed. Furthermore, since the composite member 1 involved in this embodiment has excellent flatness, the organic EL display panel 3 can be bonded to the composite member 1 in a more desirable state, improving the adhesion between the organic EL display panel 3 and the composite member 1, and enabling heat conduction without unevenness.

[0138] Furthermore, by using the composite component 1 according to this embodiment, it is possible to prevent the composite component 1 from changing shape due to the heat generated by the organic EL display panel 3 during operation. Therefore, even if heat is generated on the organic EL display panel 3 during operation, the generated heat can be more reliably conducted to the composite component 1 side without unevenness, and the preferred operating state of the organic EL display panel 3 can be maintained.

[0139] Above, refer to Figure 4 The device using the composite component 1 according to this embodiment is described in detail.

[0140] Example

[0141] Hereinafter, with examples and comparative examples provided, the composite component, the method for manufacturing the composite component, and the apparatus of the present invention will be specifically described. It should be noted that the examples shown below are merely examples of the composite component, the method for manufacturing the composite component, and the apparatus of the present invention are not limited to the examples described below.

[0142] In the embodiments shown below, as aluminum plate 10, a commercially available aluminum plate with the desired thickness is prepared, and as steel plate 20, the following three types of steel plates (manufactured by Nippon Steel Corporation) with the desired thickness are prepared.

[0143] ZL-HL: A steel sheet with a brushed finish applied to electroplated Zn-Ni alloy steel. A transparent coating with a thickness of 6μm has been formed on the surface of the steel sheet.

[0144] GI-PCM: Hot-dip galvanized steel sheet. A 20μm thick coating layer has been formed on the surface of the steel sheet (primer coating: 5μm + topcoat coating: 15μm).

[0145] CR-coating: Cold-rolled steel sheet. The steel sheet surface underwent a chemical conversion treatment using zinc phosphate, followed by a powder coating with a thickness of 50 μm.

[0146] As the resin composition for forming resin layer 30, a commercially available resin as shown below is prepared. It should be noted that the glass transition temperature Tg and viscoelastic properties (dynamic storage modulus E', dynamic loss modulus E") of the resin used are determined by the methods described above.

[0147] PE: Polyethylene resin (NOVATEC HD HF560 manufactured by Japan Polyethylene Co., Ltd.)

[0148] EP: Epoxy resin (Mitsubishi Chemical Analytech Co., Ltd., 1009)

[0149] PES: Polyester resin (Toyobo Co., Ltd. SI-173)

[0150] UR: Carbamate resin (PANDEX T-5765D manufactured by DIC Covestro Polymer Co., Ltd.)

[0151] In addition, when forming the adhesive layer 40, a commercially available adhesive with epoxy resin as the main component (TB1655 manufactured by ThreeBond Co., Ltd.) is used.

[0152] Based on the application of an adhesive to the surfaces of the aluminum plate 10 and the steel plate 20 as needed, thermocouples for measuring the surface temperature of the aluminum plate 10 and the steel plate 20 are installed. Then, the aluminum plate 10 and the steel plate 20 are arranged to be isolated from each other in such a way that the resin layer 30 is of the desired thickness, and molten resin composition is injected into the gap between the aluminum plate 10 and the steel plate 20 to produce the composite component 1.

[0153] At this point, when the surface temperature of composite component 1 reaches the desired temperature, a roller straightening machine is used to straighten the shape of composite component 1. At this time, the processing degree of the roller straightening machine is 5. After straightening, the resin composition is cooled to a temperature below the glass transition temperature Tg at a cooling rate of 5°C / min to cure it, thus manufacturing the composite component. It should be noted that the shape of composite component 1 is rectangular, with a width-to-height ratio (width:height) of 16:9. Additionally, the diagonal length of composite component 1 is set to 60 inches (1524 mm).

[0154] The obtained composite components were evaluated from the perspectives of maximum deformation, heat uniformity, steepness, shape change during use, pressing processability, and color unevenness. The results are summarized in Table 1 below. Details of the evaluation are as follows.

[0155] Maximum Deformation

[0156] The maximum deformation in any direction of the obtained composite component is measured.

[0157] <Even Heat Distribution>

[0158] From the obtained composite component, a 70mm × 180mm sample was fabricated. A rubber heater was installed at one end of the aluminum plate 10 side, and the heater output was maintained at a constant 3.4W for 30 minutes. Temperature measurements were taken from the steel plate 20 side every 50mm from the end. The temperature difference ΔT between the heater temperature and the temperature at a distance of 150mm from the end was calculated. Based on the obtained temperature difference ΔT, an evaluation was performed using the following criteria. A score of S to B is considered acceptable.

[0159] S: ΔT below 15℃

[0160] A: ΔT exceeds 15℃ but is below 25℃

[0161] B: ΔT exceeds 25℃ but is below 35℃

[0162] C: ΔT exceeds 35℃

[0163] <Steepness>

[0164] For the obtained composite component, the maximum deformation was measured on the plate in the same manner as above, and the interval between deformation occurrences, i.e., the spacing, was also measured. Based on the obtained maximum deformation and spacing, the steepness (%) was calculated as (maximum deformation ÷ spacing) × 100. Based on the obtained steepness, an evaluation was performed using the following criteria. Scores S to B are considered acceptable.

[0165] S: Steepness less than 0.5%

[0166] A: Steepness exceeding 0.5% but below 1.0%

[0167] B: Steepness exceeding 1.0% but below 2.0%

[0168] C: Steepness exceeds 2.0%

[0169] <Shape changes during use>

[0170] To mimic the bonding of the obtained composite components with an organic EL display panel, a fabrication process is performed as follows: Figure 5 The test subjects shown are evaluated in the following manner.

[0171] The resulting composite component was cut to a size of 380 mm wide and 285 mm high. Then, the steel plate 20 sides of the composite component were overlapped with a 0.8 mm thick hot-dip galvanized steel plate of the same size, and positioned vertically (refer to...). Figure 5 (See the diagram above). The four sides of the composite component are clamped with commercially available angle irons (see reference). Figure 5 (See the diagram in the next section). Based on this, screws are used as a mechanism to fix the composite component and the hot-dip galvanized steel sheet. A halogen heater is arranged non-contactly on the aluminum plate 10 side of the composite component to heat the aluminum plate 10. The maximum displacement when the surface temperature of the aluminum plate 10 reaches 50°C is measured using a laser displacement meter. Based on the obtained maximum displacement, an evaluation is performed using the following criteria. Scores S to B indicate acceptance.

[0172] S: Maximum displacement less than 0.5mm

[0173] A: Maximum displacement exceeding 0.5mm but less than 1.0mm

[0174] B: Maximum displacement exceeding 1.0 mm but less than 1.8 mm

[0175] C: Maximum displacement exceeds 1.8mm

[0176] <Processability>

[0177] The resulting composite component was extruded using an Ericsson testing machine (according to JIS Z 2247) with the aluminum plate having 10 concave sides until the test piece broke. The maximum extrusion height D (in mm) at which cracks occurred was determined. Based on the obtained height D, the component was evaluated using the following criteria. A score of S to B is considered acceptable.

[0178] S: Height D 7mm or more

[0179] A: Height D is 5mm or more but less than 7mm

[0180] B: Height D is 3mm or more but less than 5mm

[0181] C: Height D is less than 3mm

[0182] Uneven color

[0183] The aluminum plate 10 of the obtained composite component 1 was joined to an organic EL display panel manufactured by Sony Corporation. The organic EL display was shown continuously for one hour with one half of the screen set to red and the other half to black. Then, the logo of Nippon Steel Corporation (a blue-based logo) was displayed in the center of the screen, and 10 people visually judged the appearance of the blue color. Evaluation was based on the number of people who perceived a color difference, using the following criteria. A score of S to B was considered acceptable. It should be noted that in Table 1 below, No. 10 and 23, an evaluation result of "-" indicates a shape defect during processing, making assembly into the organic EL display panel impossible, and therefore no evaluation can be performed.

[0184] S: 0 people

[0185] A: Any one of the 1, 2, or 3 people

[0186] B: Any one of the 4, 5, or 6 people

[0187] C: 7 or more people [Table 1]

[0188]

[0189] As can be seen from Table 1 above, the composite component corresponding to the embodiment of the present invention has excellent heat uniformity and pressing processability, while suppressing shape changes during manufacturing and use. On the other hand, in the composite component corresponding to the comparative example of the present invention, any one of heat uniformity, pressing processability, or shape changes during manufacturing or use is unqualified.

[0190] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to these examples. Obviously, anyone skilled in the art to which this invention pertains will be able to conceive of various modifications or alterations within the scope of the technical concept described in the claims, and these are also understood to fall within the protection scope of this invention.

[0191] Explanation of reference numerals in the attached figures

[0192] 1 Composite component

[0193] 3 Organic EL Display Panel

[0194] 5. Electronic substrate

[0195] 10 Aluminum Plate

[0196] 20 steel plate

[0197] 30 resin layers

[0198] 40 Adhesive Layers

[0199] 201 base steel plate

[0200] 203 coating

[0201] 205 Coating Layer

[0202] 500 Organic EL Displays

Claims

1. A composite component comprising: Aluminum plate, steel plates, and A resin layer sandwiched between the aluminum plate and the steel plate. The thickness t of the aluminum plate A The diameter is 0.20–1.60 mm. The thickness t of the steel plate B The thickness is 0.15–1.20 mm. The overall thickness t of the composite component T The diameter is 1.50–5.00 mm. The thickness t of the aluminum plate A The thickness t of the steel plate is greater than or equal to B , The steepness calculated using the following formula is below 2.0%. Steepness (%) = (maximum deformation of composite component ÷ spacing of deformation occurrence) × 100.

2. The composite component according to claim 1, wherein, The flatness of the composite component has a maximum deformation of less than 3.0 mm in any direction.

3. The composite component according to claim 1 or 2, wherein, The flatness of the composite component has a maximum deformation of less than 2.0 mm in any direction.

4. The composite component according to claim 1 or 2, wherein, The thickness t of the aluminum plate A Relative to the thickness t of the steel plate B The ratio t A / t B The value ranges from 1.10 to 3.

30.

5. The composite component according to claim 1 or 2, wherein, The thickness t of the aluminum plate A The thickness t of the steel plate B and the overall thickness t of the composite component T Satisfy (t) A +t B ) / t T A relationship ≤0.

65.

6. The composite component according to claim 1 or 2, wherein, The resin layer comprises polyethylene resin or epoxy resin.

7. The composite component according to claim 1 or 2, wherein, The glass transition temperature (Tg) of the resin contained in the resin layer is below 0°C or between 50°C and 180°C.

8. The composite component according to claim 1 or 2, wherein, The ratio of the dynamic storage modulus E' to the dynamic loss modulus E” of the resin contained in the resin layer at 100°C is 0.20 to 20.

0.

9. The composite component according to claim 1 or 2, wherein, An adhesive layer is further provided at least in either the resin layer and the aluminum plate, or in at least the resin layer and the steel plate.

10. The composite component according to claim 1 or 2, wherein, The steel plate has a plating layer on at least one side and a coating layer on the plating layer.

11. A device comprising: The composite component according to any one of claims 1 to 10, and A device that generates heat during operation and is located on the surface of the aluminum plate side of the composite component in at least partial contact.

12. The device according to claim 11, wherein, The device that generates heat during operation is an organic EL display panel. The device is an organic EL display.

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