Composite layer structure and production method thereof

Abstract

The invention provides a composite layer structure and a production method thereof.The composite layer structure comprises a reinforcing layer and a microcrystalline rock layer, one side of the reinforcing layer is attached to the outer surface of a workpiece, the reinforcing layer is used for improving the strength of the composite layer structure, and the microcrystalline rock layer is stacked on the other side of the reinforcing layer to form the outer surface, with the rock texture, of the workpiece; thus, the reinforcing layer is attached and fixed to the microcrystalline rock layer to form the composite layer structure, then the composite layer structure is attached to the surface of the workpiece, the microcrystalline rock layer forms the outer surface of the workpiece, an existing aluminum alloy surface is replaced, a surface with the rock texture is formed, the surface is more attractive in vision, and meanwhile the surface is more attractive. The overall strength of the composite layer structure can be improved through the reinforcing layer; therefore, novel visual and tactile experience is brought to a user on the basis that the functional requirement of the outer surface of the workpiece is met.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to a composite layer structure and a production method thereof. Background Art

[0002] In electronic products (e.g., laptop cases or mobile phone cases), aluminum alloy materials are widely used in traditional laptop cases due to their high strength, good corrosion resistance, and ability to achieve colorful appearance effects. However, due to the use of anodizing technology over the years, the appearance differentiation of the produced laptop cases has become less and less, causing visual fatigue among consumers.

[0003] Therefore, the market needs a product that can bring a brand new visual experience to consumers. Summary of the Invention

[0004] The present application provides a composite layer structure and a production method thereof to at least solve the above-mentioned problems in the prior art.

[0005] To achieve the above objectives, the present application provides the following technical solutions: a composite layer structure, the composite layer structure comprising:

[0006] Reinforcement layer; one side of the reinforcement layer is attached to the outer surface of the workpiece, and the reinforcement layer is used to increase the strength of the composite layer structure;

[0007] The microcrystalline rock layer is stacked on the other side of the reinforcement layer to form an outer surface of the workpiece with a rock texture.

[0008] In one embodiment, the composite layer structure further includes a coating layer, which is coated on a side of the microcrystalline rock layer facing away from the reinforcement layer.

[0009] In one embodiment, the composite layer structure further includes a heat insulation layer, which is bonded between the reinforcement layer and the microcrystalline rock layer to prevent heat transfer between the microcrystalline rock layer and the reinforcement layer.

[0010] In one embodiment, the composite layer structure further includes a metal base layer, which is made of metal material and is bonded to a side of the reinforcement layer away from the microcrystalline rock layer, so that the composite layer structure also has a metallic luster.

[0011] In one embodiment, the components and weight percentages of the microcrystalline rock layer are: resin 20%-40%, aluminum hydroxide 20%-40%, calcium carbonate 10%-30%, quartz sand 10%-30%, pigment 1%-5%, curing agent 0.2%-2% and accelerator 0.1%-1.2%.

[0012] In one embodiment, the microcrystalline rock layer is made of natural stone.

[0013] In one embodiment, the present application further provides a method for producing a composite layer structure, which is used to produce the above-mentioned composite layer structure, comprising the following steps:

[0014] Making microcrystalline rock layers;

[0015] Bonding and fixing the prepared microcrystalline rock layer to the thermal insulation layer;

[0016] The heat insulation layer bonded with the microcrystalline rock layer is bonded and fixed to the reinforcement layer.

[0017] In one embodiment, the metal base layer is bonded to the side of the reinforcement layer facing away from the thermal insulation layer;

[0018] The resin is flow-coated onto the side of the microcrystalline rock layer facing away from the reinforcement layer through a flow-coating process to form a flow-coating layer.

[0019] In one embodiment, the microcrystalline rock raw materials are mixed, and the mixed microcrystalline rock raw materials are pressed at a predetermined pressure for a predetermined time to form the microcrystalline rock raw materials into a calendering shape;

[0020] The rolled microcrystalline rock raw material is placed in a crystallization furnace, the crystallization furnace is heated to a predetermined temperature, and nitrogen is introduced to adjust the furnace gas of the crystallization furnace, so that the rolled microcrystalline rock raw material is crystallized and a microcrystalline rock blank is formed;

[0021] The microcrystalline rock blank is cut into predetermined thicknesses to form microcrystalline rock layers.

[0022] In one embodiment, the predetermined pressure for calendering the microcrystalline rock raw material is 50-80 MPa, and the predetermined pressing time is 20-30 min;

[0023] The predetermined temperature for crystallization of the microcrystalline rock after calendering is 1000°C to 1200°C.

[0024] In the above-mentioned composite layer structure, a reinforcing layer is attached and fixed to the microcrystalline rock layer to form a composite layer structure, and then the composite layer structure is attached to the surface of the workpiece, and the microcrystalline rock layer forms the outer surface of the workpiece to replace the existing aluminum alloy surface and form a surface with a rock texture, making it more visually attractive. At the same time, the overall strength of the composite layer structure can be improved by the reinforcing layer; thereby achieving a novel visual and tactile experience for users on the basis of meeting the functional requirements of the outer surface of the workpiece.

[0025] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present application, nor is it intended to limit the scope of the present application. Other features of the present application will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and other objects, features and advantages of the exemplary embodiments of the present application will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present application are shown in an illustrative and non-limiting manner, in which:

[0027] In the drawings, the same or corresponding reference numerals denote the same or corresponding parts.

[0028] Figure 1 A schematic cross-sectional view of the composite layer structure in an embodiment of the present application is shown;

[0029] Figure 2 A flow chart showing a method for producing a composite layer structure according to an embodiment of the present application is shown;

[0030] Figure 3 A flowchart of the process of producing a microcrystalline rock layer in an embodiment of the present application is shown;

[0031] Figure 4 The effect diagram of the composite layer structure in the embodiment of the present application is shown.

[0032] Explanation of the numbers in the figure: 11, microcrystalline rock layer; 12, reinforcement layer; 13, thermal insulation layer; 14, metal base layer; 15, coating layer. DETAILED DESCRIPTION

[0033] In order to make the purpose, features, and advantages of this application more obvious and easy to understand, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of this application.

[0034] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in this disclosure can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of this application can be achieved. This is not limited herein.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0036] In the related art, the outer surface of existing workpieces is usually made of aluminum alloy. Although the outer surface of the workpiece formed by the aluminum alloy has high strength and corrosion resistance, the long-term use of the anode technology on the aluminum alloy surface has caused visual fatigue to consumers.

[0037] In order to solve the above technical problems, R&D personnel discovered through research that the natural texture of stone and the metallic luster have a sharp contrast, which is more visually attractive and impactful, and can bring a new visual experience to consumers.

[0038] Therefore, in some embodiments, please combine Figure 1 The present application provides a composite layer structure, which includes a reinforcing layer 12 and a microcrystalline rock layer 11. The reinforcing layer 12 ensures the strength of the composite layer structure, and the microcrystalline rock layer 11 gives the composite layer structure a rocky texture, thereby providing consumers with a new visual experience. One side of the reinforcing layer 12 is attached to the outer surface of the workpiece and is used to increase the strength of the composite layer structure; the microcrystalline rock layer 11 is stacked on the other side of the reinforcing layer 12 to form an outer surface of the workpiece with a rocky texture. For example, the workpiece can be the shell of a laptop computer, and the reinforcing layer 12 can be made of a fiberglass board. Figure 1 Schematic diagram of the cross section of the composite layer structure.

[0039] In the above-mentioned composite layer structure, the reinforcing layer 12 is attached and fixed to the microcrystalline rock layer 11 to form a composite layer structure, and then the composite layer structure is attached to the surface of the workpiece, and the microcrystalline rock layer 11 forms the outer surface of the workpiece to replace the existing aluminum alloy surface and form a surface with a rock texture, making it more visually attractive. At the same time, the overall strength of the composite layer structure can be improved by the reinforcing layer 12; thereby achieving a novel visual and tactile experience for users on the basis of meeting the functional requirements of the outer surface of the workpiece.

[0040] In some embodiments, please combine Figure 1 The composite layer structure further includes a coating layer 15, which is applied to the side of the microcrystalline rock layer 11 facing away from the reinforcing layer 12. Thus, by applying the liquid coating material onto the microcrystalline rock layer 11 to form the coating layer 15, the formed coating layer 15 has a more uniform and smooth surface, thereby improving the tactile and visual effects of the workpiece.

[0041] In some specific embodiments, the coating material forming the coating layer 15 can be a transparent epoxy resin or a transparent photosensitive resin; thus, the epoxy resin or the photosensitive resin can also increase the wear resistance and corrosion resistance of the workpiece surface, thereby extending the service life of the workpiece.

[0042] In some embodiments, please combine Figure 1The composite layer structure further includes a heat insulating layer 13 , which is bonded between the reinforcing layer 12 and the microcrystalline rock layer 11 to prevent heat transfer between the microcrystalline rock layer 11 and the reinforcing layer 12 .

[0043] In this way, the heat insulation layer 13 is provided between the microcrystalline rock layer 11 and the reinforcement layer 12, which can effectively block the heat transfer between the two, thereby reducing the impact of the heat generated by the workpiece during operation on the microcrystalline rock layer 11, and also helps to protect the internal electronic components from being damaged by external high temperature.

[0044] In some specific embodiments, the heat insulating layer 13 is a layered structure made of nano-aluminum oxide material, and the heat insulating layer 13 is fixed to the reinforcing layer 12 and the microcrystalline rock layer 11 by resin bonding.

[0045] In some embodiments, please combine Figure 1 The composite layer structure further includes a metal base layer 14. The metal base layer 14 is made of a metal material and is bonded to the side of the reinforcement layer 12 that is away from the microcrystalline rock layer 11, so that the composite layer structure also has a metallic luster. For example, the metal base layer 14 can be made of an aluminum alloy material.

[0046] In this way, both metal and rock can give people a sense of high quality. The composite layer structure breaks the appearance brought by a single material by combining metal and microcrystalline rock layer 11, and can bring a new visual and tactile experience. At the same time, different metals and microcrystalline rock layers 11 of different colors can be selected to meet the personalized needs of the market.

[0047] In some optional embodiments, the metal base layer 14 may be the outer surface of the workpiece, the reinforcement layer 12 is directly attached to the outer surface of the workpiece, and the outer surface of the workpiece is made of a metal material, such as aluminum alloy.

[0048] Preferably, the metal base layer 14 and the reinforcement layer 12 can be bonded and fixed by an adhesive with release paper.

[0049] In other optional embodiments, the metal base layer 14 can also be a layered structure independent of the workpiece, and is bonded between the reinforcement layer 12 and the outer surface of the workpiece, and the reinforcement layer 12 is indirectly attached to the outer surface of the workpiece through the metal base layer 14.

[0050] Preferably, the metal base layer 14 and the reinforcement layer 12 can be fixed by resin bonding.

[0051] In some embodiments, the microcrystalline rock layer 11 is made of natural stone. Natural stone has a natural texture effect and can form a natural rock texture.

[0052] Preferably, the natural stone can be basalt, limestone or dolomite; among them, basalt has high hardness, high strength and good wear resistance, which can improve the hardness and wear resistance of the composite layer structure; limestone has uniform texture and good processing performance, which can make the composite layer structure easier to process; dolomite has stable chemical properties, excellent weather resistance and aging resistance, and can improve the service life of the composite layer structure.

[0053] Furthermore, when natural stone is used as basalt, the components and weight percentages of the formed microcrystalline rock layer 11 are: silicon dioxide 52%-55%, aluminum oxide 10%-15%, calcium oxide 13%-15%, magnesium oxide 3%, iron oxide 1%-4% and sodium hydroxide 8%-21%.

[0054] It should be noted that the components and weight percentages of the microcrystalline rock layer 11 are determined by the chemical composition and percentages of the respective chemical components of basalt. The present application can directly use basalt having the aforementioned chemical composition and proportions as the material for the microcrystalline rock layer 11, and form the microcrystalline rock layer 11 by cutting the microcrystalline rock into a predetermined thickness. The present application can also produce a microcrystalline rock layer 11 that mimics natural stone based on the aforementioned chemical composition and proportions.

[0055] In some embodiments, the microcrystalline rock adopts an artificial stone structure. The components and weight percentages of the microcrystalline rock layer 11 are: resin 20%-40%, aluminum hydroxide 20%-40%, calcium carbonate 10%-30%, quartz sand 10%-30%, pigment 1%-5%, curing agent 0.2%-2%, and accelerator 0.1%-1.2%.

[0056] The curing agent in the microcrystalline rock layer 11 is used to adjust the curing reaction time of the resin in the artificial stone structure so that the resin can complete the curing reaction within a certain period of time. The proportion of the curing agent is generally 1% to 5% by weight of the anchoring resin. Exemplary curing agents include methyl ethyl ketone oxide and cobalt naphthenate solution.

[0057] The accelerator in the components of the microcrystalline rock layer 11 works synergistically with the curing agent to accelerate the curing efficiency and control the gel time of the microcrystalline rock raw material within a predetermined time, thereby improving the production time of the microcrystalline rock layer 11.

[0058] It should be noted that since both the curing agent and the accelerator act on the resin to increase the curing time of the resin, during the experiment, the curing agent and the accelerator are added to the resin to obtain the weight percentage of the curing agent and the accelerator relative to the resin. In this way, there is no need to add all other materials, which is beneficial to improving the experimental efficiency and experimental cost. After many tests, it was found that the weight percentage of the curing agent relative to the resin was 1%-5%, and the weight percentage of the accelerator relative to the resin was 0.5%-3%. Then, according to the calculation method of the overall weight percentage, the curing agent weight percentage relative to the overall weight percentage was obtained to be 0.2%-2%, and the accelerator weight percentage relative to the overall weight percentage was 0.1%-1.2%.

[0059] The resin in the components of the microcrystalline rock layer 11 has, on the one hand, an adhesive effect. The resin penetrates into the gaps between the microcrystalline rock particles during pressing, and forms a network structure after solidification, thereby enhancing the overall strength and mechanical properties of the board. On the other hand, it improves the surface, fills the gaps and bumps on the surface of the board, making it smoother and flatter. On another hand, it has good corrosion resistance. The resin can provide protection inside and outside the microcrystalline rock layer 11 by virtue of its own water resistance and corrosion resistance, thereby improving the overall water resistance and chemical corrosion resistance of the microcrystalline rock layer 11. It also improves processability, reduces the cracking and falling off between microcrystalline rock particles, improves the accuracy and efficiency of operations such as cutting and drilling, reduces costs, and optimizes the edge effect after processing.

[0060] On the one hand, the aluminum hydroxide in the components of the microcrystalline rock layer 11 can improve the processing performance, reduce the processing viscosity of the microcrystalline rock raw materials, increase fluidity, improve molding efficiency and product quality, and increase the plasticity of the microcrystalline rock raw materials, making it easier to shape different shapes and sizes; on the other hand, it can improve the physical properties, increase the hardness of the microcrystalline rock layer 11, absorb and disperse external forces to enhance impact resistance; enhance chemical stability, form a protective film through chemical reactions to resist acid and alkali erosion, fill gaps, reduce water absorption, adapt to humid environments, and improve water resistance; on yet another hand, it can also improve the flame retardancy of the microcrystalline rock layer 11 and improve fire safety.

[0061] On the one hand, the calcium carbonate in the components of the microcrystalline rock layer 11 can adjust the performance of the microcrystalline rock material, and with its own hardness as support, improve the microcrystalline rock's pressure-bearing and damage-resistant capacity, as well as improve its wear resistance; on the other hand, it reduces the viscosity of the microcrystalline rock raw materials and improves the fluidity of the mixing and molding links, thereby improving production efficiency and quality; on yet another hand, it adjusts the color appearance and can improve the whiteness and brightness of the microcrystalline rock layer 11. After the calcium carbonate particles are dispersed, they can absorb scattered light and eliminate color difference, thereby ensuring the uniformity of the color of the microcrystalline rock layer 11. Calcium carbonate particles also have the advantage of low cost.

[0062] The quartz sand in the components of the microcrystalline rock layer 11 has high hardness, high melting point and good chemical stability, and can significantly improve the hardness, strength, wear resistance and corrosion resistance of the microcrystalline rock layer 11 .

[0063] The pigment in the components of the microcrystalline rock layer 11 is used to adjust the color presented by the microcrystalline rock layer 11 .

[0064] Furthermore, alumina or glass fiber may be added to the microcrystalline rock raw material to further improve the overall strength of the microcrystalline rock layer 11 .

[0065] In some optional embodiments, the pigment is a metal oxide. Different metal oxides generally have different colors. Composite layer structures with different colors can be achieved by adding different metal oxides.

[0066] Furthermore, the pigment can be at least one of titanium dioxide, iron oxide, chromium oxide, and zinc oxide. Titanium dioxide is a white pigment with a high refractive index and good hiding power, enabling the composite layer structure to have a pure white color and high gloss. It also absorbs ultraviolet rays and prevents fading and aging. Iron oxide has various color variations, including red, yellow, and brown. Chromium oxide is green and has good light and weather resistance. Zinc oxide is white or slightly yellow and also has corrosion resistance and antibacterial properties.

[0067] In other optional embodiments, the color of the pigment can also be pearlescent pigment or fluorescent pigment. For example, the pearlescent pigment can be shell powder; the fluorescent pigment can be fluorescent agents of various colors.

[0068] It should be noted that the above-mentioned pigment types are merely examples, and this application does not limit the specific types of pigments.

[0069] In some embodiments, please combine Figure 2 The present application also provides a method for producing a composite layer structure, which is used to produce the above-mentioned composite layer structure and comprises the following steps:

[0070] S1, making microcrystalline rock layer 11;

[0071] S2, bonding and fixing the prepared microcrystalline rock layer 11 and the thermal insulation layer 13;

[0072] S3 , bonding and fixing the heat insulation layer 13 bonded with the microcrystalline rock layer 11 and the reinforcement layer 12 .

[0073] In some embodiments, in step S4 , resin is flow-coated onto the side of the microcrystalline rock layer 11 facing away from the reinforcement layer 12 by a flow-coating process to form a flow-coated layer 15 . Figure 2 A flow chart of a method for producing a composite layer structure.

[0074] In some embodiments, in step S5 , the metal base layer 14 is bonded to the side of the reinforcement layer 12 facing away from the thermal insulation layer 13 .

[0075] In some embodiments, please combine Figure 3 In step S1, the method for producing the microcrystalline rock layer 11 includes the following steps:

[0076] S11, mixing microcrystalline rock raw materials, and pressing the mixed microcrystalline rock raw materials at a predetermined pressure for a predetermined time to form the microcrystalline rock raw materials into a calendering shape;

[0077] S12, placing the rolled microcrystalline rock raw material into a crystallization furnace, heating the crystallization furnace to a predetermined temperature, and introducing nitrogen to regulate the furnace gas in the crystallization furnace, so as to crystallize the rolled microcrystalline rock raw material and form a microcrystalline rock blank;

[0078] S13 , cutting the microcrystalline rock blank into pieces of predetermined thickness to form a microcrystalline rock layer 11 . Figure 3 Flow chart for making microcrystalline rock layers.

[0079] In some embodiments, the predetermined pressure for calendering the microcrystalline rock raw material is 50-80 MPa, and the predetermined pressing time is 20-30 minutes, so as to improve the density and uniformity of the microcrystalline rock raw material, thereby increasing the hardness and compressive strength of the microcrystalline rock layer 11 while also improving aesthetic properties.

[0080] In some embodiments, the predetermined crystallization temperature of the formed microcrystalline rock is 1000° C. to 1200° C. By precisely controlling the crystallization temperature and gas environment, the formation and growth of the crystal structure in the material can be promoted, thereby improving the strength, hardness, and corrosion resistance of the microcrystalline rock. Simultaneously, the introduction of nitrogen can control the oxidation process, helping to form a more stable crystal structure.

[0081] In some specific embodiments, the rolled microcrystalline rock raw material is placed in a crystallization furnace, slowly heated to 1100°C, nitrogen is introduced to adjust the temperature in the furnace, and maintained for two hours; by precisely controlling the crystallization process, it can be ensured that the obtained microcrystalline rock blank achieves ideal physical and chemical properties.

[0082] In some embodiments, in step S13, cutting is performed using a wire cutting machine, wherein the cutting wire uses a diamond wire with a diameter of 0.1 mm to 0.5 mm, a wire speed of 0.5 m / s to 1 m / s, a feed rate of 2 mm / min to 5 mm / min, and is cooled using a water-based coolant. In this manner, diamond wire cutting can improve cutting accuracy and surface quality, reduce material waste, and the water-based coolant can improve environmental friendliness and production costs.

[0083] Example

[0084] Preparation of the microcrystalline rock layer 11: the raw material ratio is 30% resin, 30% aluminum hydroxide, 20% calcium carbonate, 15% quartz sand, 3% pigment, 1.5% curing agent (relative to the weight of the resin), and 0.5% accelerator (relative to the weight of the resin); molding process: the mixed raw materials are pressed under a pressure of 80 MPa for 20 minutes; crystallization process: the molded material is placed in a crystallization furnace, heated to 1100°C, nitrogen is introduced to regulate the gas in the furnace, and maintained for 2 hours; cutting: use a diamond wire with a diameter of 0.3 mm, a line speed of 0.8 m / s, a feed speed of 3 mm / min for cutting, and use a water-based coolant.

[0085] Processing the composite layer structure: First, each layer of material is processed according to the outer surface of the workpiece to be pasted. Then, the metal base layer 14, the reinforcement layer 12, the thermal insulation layer 13 and the microcrystalline rock layer 11 are pasted in sequence to form a laminated structure. Finally, epoxy resin is sprayed on the outer surface of the microcrystalline rock layer 11 to form a spray coating layer 15.

[0086] Assembly: Gluing the composite layer structure to the outer surface of the workpiece.

[0087] Please combine Figure 4 In this way, the above embodiment can obtain a visual effect with both stone texture and metal texture, while ensuring the strength, heat insulation and overall aesthetics of the product. Figure 4 This is a rendering of the composite layer structure processed by the processing method of this embodiment.

[0088] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A composite layer structure, characterized in that: The composite layer structure comprises: A reinforcement layer; one side of the reinforcement layer is attached to the outer surface of the workpiece, and the reinforcement layer is used to improve the strength of the composite layer structure; A microcrystalline rock layer is stacked on the other side of the reinforcement layer to form an outer surface of the workpiece with a rock texture.

2. The composite layer structure according to claim 1, characterized in that The composite layer structure further includes a coating layer, which is coated on a side of the microcrystalline rock layer away from the reinforcement layer.

3. The composite layer structure according to claim 1, characterized in that The composite layer structure further includes a heat insulation layer, which is bonded between the reinforcement layer and the microcrystalline rock layer to prevent heat transfer between the microcrystalline rock layer and the reinforcement layer.

4. The composite layer structure according to claim 1, characterized in that The composite layer structure further includes a metal base layer, which is made of metal material and is bonded to a side of the reinforcement layer away from the microcrystalline rock layer, so that the composite layer structure also has metallic luster.

5. The composite layer structure according to claim 1, characterized in that The components and weight percentages of the microcrystalline rock layer are: resin 20%-40%, aluminum hydroxide 20%-40%, calcium carbonate 10%-30%, quartz sand 10%-30%, pigment 1%-5%, curing agent 0.2%-2% and accelerator 0.1%-1.2%.

6. The composite layer structure according to claim 1, characterized in that The microcrystalline rock layer is made of natural stone.

7. A method for producing a composite layer structure, characterized in that: For producing the composite layer structure according to any one of claims 1 to 6, comprising the following steps: producing the microcrystalline rock layer; Bonding and fixing the prepared microcrystalline rock layer to the thermal insulation layer; The heat insulation layer bonded with the microcrystalline rock layer is bonded and fixed to the reinforcement layer.

8. The method for producing a composite layer structure according to claim 7, characterized in that: bonding a metal base layer to a side of the reinforcement layer facing away from the thermal insulation layer; The resin is flow-coated onto the side of the microcrystalline rock layer facing away from the reinforcement layer through a flow-coating process to form a flow-coating layer.

9. The method for producing a composite layer structure according to claim 7, characterized in that: Mixing microcrystalline rock raw materials, and pressing the mixed microcrystalline rock raw materials at a predetermined pressure for a predetermined time to calender the microcrystalline rock raw materials into a shape; The rolled microcrystalline rock raw material is placed in a crystallization furnace, the crystallization furnace is heated to a predetermined temperature, and nitrogen is introduced to adjust the furnace gas of the crystallization furnace, so that the rolled microcrystalline rock raw material is crystallized and a microcrystalline rock blank is formed; The microcrystalline rock blank is cut into a predetermined thickness to form the microcrystalline rock layer.

10. The method for producing a composite layer structure according to claim 9, characterized in that: The predetermined pressure for calendering the microcrystalline rock raw material is 50-80 MPa, and the predetermined pressing time is 20-30 min; The predetermined temperature for crystallization of the microcrystalline rock after calendering is 1000°C to 1200°C.

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