Composite material structure, shell and electronic device

Abstract

The present application provides a composite material structure, a shell and an electronic device. The composite material structure can be used in a shell or an electronic device. The composite material structure comprises at least one layer of a first fiber prepreg. The first fiber prepreg comprises a fiber sheet and a resin that coats the fiber sheet, wherein the fiber sheet comprises a fiber cloth and a plurality of coating layers located on a surface of the fiber cloth, and the difference value between the refractive indexes of every two adjacent coating layers of the plurality of coating layers is greater than or equal to 0.4. In the composite material structure provided by the present application, a difference between the refractive indexes of adjacent coating layers leads to a difference in the brightness, thereby improving the visual aesthetics of the composite fiber material when the composite fiber material is used in a shell and an electronic device.

Description

Composite material structure, housing and electronic equipment

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on March 19, 2024, with application number 202410316359.3, and priority to the Chinese patent application entitled “A composite material structure, housing and electronic device”, all contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of electronic equipment, and more specifically, to a composite material structure, a housing, and an electronic device. Background Art

[0003] Fiber composites, with their high strength and low density, are a key material for electronic device casings, offering advantages such as light weight and resistance to drops. However, due to the molding process and properties of fiber composites, fiber grain can be easily visible on the casing, resulting in a lackluster appearance and aesthetic appeal. This is particularly true for the back covers of high-end products like flagship phones and tablets, significantly impacting the overall aesthetics and value of the product.

[0004] Currently, the main processes for processing the appearance of shell materials are spraying plus rubbing, curtain coating plus transfer or rubbing. However, these traditional processes achieve a flat effect, which is difficult to achieve differentiation and cannot bring consumers richer appearance effects or improve the appearance of the product. Summary of the Invention

[0005] The present application provides a composite material structure, a housing, and an electronic device. The composite material structure can achieve bright lines or a glare effect. When the composite material structure is applied to the housing and the electronic device, it can enrich the appearance of the housing and the electronic device and improve the appearance of the housing and the electronic device.

[0006] In a first aspect, a composite material structure is provided, which includes at least one layer of a first fiber prepreg, wherein the first fiber prepreg includes a fiber sheet and a resin wrapping the fiber sheet; the fiber sheet includes a fiber cloth and a plurality of coating layers located on the surface of the fiber cloth, and the difference in refractive index between two adjacent layers of the plurality of coating layers is greater than or equal to 0.4.

[0007] The first fiber prepreg may be understood as a fiber composite material pre-impregnated with resin, and the first fiber prepreg may be a fiber prepreg sheet with a brightening effect.

[0008] For example, the fiber cloth can be a woven cloth, or a mesh cloth, a felt cloth, etc. The material of the fiber cloth can include any of the following: glass fiber, basalt fiber, carbon fiber, aramid fiber, ceramic fiber, polyethylene terephthalate fiber (PET fiber), ultra-high molecular weight polyethylene fiber (UHMWPE fiber), polyphenylene benzobisoxazole fiber (PBO fiber), polyimide fiber (PI fiber), polypropylene fiber, hemp fiber, bamboo fiber. The fiber cloth can be colored or colorless. Among them, the material of the fiber cloth is preferably glass fiber, followed by UHMWPE fiber.

[0009] For example, the fiber sheet includes a fiber cloth and multiple coating layers on the surface of the fiber cloth. The multiple coating layers on the surface of the fiber cloth can also be called effect layers (effect layers with a brightening effect). The effect layers can be obtained by coating. In other words, the fiber cloth can be coated with a number of colored coating layers or brightening and reflective effect layers, so that the resulting composite material structure can transmit bright lines or have a colored glare effect.

[0010] In an embodiment of the present application, by limiting the refractive index difference between two adjacent layers of the multiple coating layers in the composite material structure to 0.4 or above, that is, by repeatedly stacking low-refractive index materials and high-refractive index materials in sequence, a difference in brightness is formed by the difference in refractive index, thereby forming the effect of bright lines or sequins. When the composite material structure is applied to a housing and an electronic device, it can enrich the appearance of the housing and the electronic device and improve the appearance of the housing and the electronic device.

[0011] It should be noted that the bright lines or sequins formed in the embodiments of the present application can be ordered or disordered. The present application does not limit this. Regular bright lines or sequins can be produced according to actual needs, or disordered bright lines or sequins can be produced.

[0012] In conjunction with the first aspect, in certain implementations of the first aspect, the plurality of coating layers include a plurality of first coating layers and a plurality of second coating layers alternately stacked, and the total thickness of the first coating layers and the second coating layers is between 600 nm and 2000 nm, i.e., the total thickness of the plurality of coating layers is between 600 nm and 2000 nm. For example, the first coating layer may be in contact with the fiber cloth, i.e., the first coating layer is first coated on the fiber cloth, followed by the second coating layer, then the first coating layer, and then the second coating layer, and so on.

[0013] It should be understood that by limiting the thickness of the multiple coating layers to a suitable range, the effect of the bright lines or sequins presented by the effect layer can be improved. In addition, the reliability of the coating layer is higher and the production cost is correspondingly reduced.

[0014] Exemplarily, the first coating layer may be any one of silicon dioxide (SiO2), zirconium dioxide (ZrO2) or single crystal silicon, and the second coating layer may be any one of niobium pentoxide (Nb2O5), titanium dioxide (TiO2) or silicon nitride (Si3N4).

[0015] For example, the resin wrapping the fiber sheet may include at least one of the following: cellulose acetate, nylon, polyurethane, polycarbonate, polymethyl methacrylate, polyethylene terephthalate, epoxy resin, acrylic resin, phenolic resin, and silicone resin.

[0016] Exemplarily, the multiple coating layers may include two or more layers of SiO2 / Nb2O5, or two or more layers of SiO2 / TiO2. That is, the multiple coating layers may include at least four layers, which may be a stack of SiO2 / Nb2O5 / SiO2 / Nb2O5 or a stack of SiO2 / TiO2 / SiO2 / TiO2, and the difference in refractive index between two adjacent layers is greater than or equal to 0.4.

[0017] Exemplarily, in order to achieve a better visual effect of bright lines or sequins, the multiple coating layers may include five stacks, which may be stacks of SiO2 / Nb2O5 / SiO2 / Nb2O5 / SiO2, or stacks of SiO2 / TiO2 / SiO2 / TiO2 / SiO2, and the refractive index difference between two adjacent layers is greater than or equal to 0.4.

[0018] For example, in an embodiment of the present application, the deposit can be deposited onto the surface (one side or both sides) of the fiber cloth by vacuum physical deposition. For example, it can be deposited onto the surface of the glass fiber by vacuum physical deposition, and the deposit can be SiO2 / Nb2O5 or SiO2 / TiO2 repeated in 2 or more groups of layers.

[0019] In conjunction with the first aspect, in certain implementations of the first aspect, the thickness of a layer of the first fiber prepreg is between 0.07 and 0.15 mm. In some embodiments, the thickness of a layer of the first fiber prepreg can be between 0.08 and 0.11 mm. By limiting the thickness of the first fiber prepreg, the resulting composite material structure is within a certain range. When the composite material structure is applied to a housing, the housing thickness is kept within a certain range, preventing the housing from being too thick.

[0020] In combination with the first aspect, in certain implementations of the first aspect, the resin wrapping the fiber sheet is a modified resin containing fluorine, and the refractive index of the modified resin containing fluorine is between 1.3 and 1.4.

[0021] It should be understood that the resin impregnated in the first fiber prepreg can be a fluorine-containing resin with a refractive index between 1.3 and 1.4, which is lower than the refractive index of conventional resins (which have a refractive index of approximately 1.5 to 1.6). When the human eye observes a composite material structure, air is first seen, followed by the resin, and finally the effect layer (multiple coating layers). If the resin's refractive index is high, the perceived effect of the effect layer will be significantly reduced. If the resin's refractive index is low, the bright lines or sequins of the effect layer will be more transparent, resulting in a better presentation.

[0022] Furthermore, if fluorine-containing resins are not used, the coating layer needs to be thicker (e.g., 2000nm) to maintain good visual effects. However, thicker coating layers may pose reliability risks and increase costs. Using fluorine-containing resins can reduce the coating layer thickness to 1200nm or even 1000nm, further resolving the issue of thicker effect layer coatings, thereby reducing reliability and mass production risks and lowering costs.

[0023] In combination with the first aspect, in certain implementations of the first aspect, the composite material structure further includes at least one layer of second fiber prepreg stacked with the first fiber prepreg, and the second fiber prepreg includes a fiber woven fabric and a resin wrapping the fiber woven fabric.

[0024] The second fiber prepreg can be understood as a fiber composite material pre-impregnated with resin. The fiber composite material here can be a fiber woven fabric, so the second fiber prepreg can also be called a fiber prepreg fabric.

[0025] It should be noted that the second fiber prepreg is a fiber woven fabric impregnated with the resin to be cured, and the first fiber prepreg is a fiber sheet impregnated with the resin to be cured. The main difference between the two is that the materials of the impregnation layer in the resin to be cured are different. The material impregnated in the second fiber prepreg is a fiber woven fabric, and the material impregnated in the first fiber prepreg is the fiber sheet provided in this application. The fiber sheet includes multiple coating layers, and multiple coating layers can achieve a brightening effect.

[0026] Exemplarily, the composite material structure includes 2 to 8 layers, preferably 2 to 5. The first fiber prepreg can be placed in any layer, preferably in any layer from 1 to 3, and the remaining layers can be the second fiber prepreg.

[0027] Exemplarily, the second fiber prepreg may be colored, colorless and translucent, or colorless and transparent, preferably colorless and transparent.

[0028] It should be understood that in order to prevent the first fiber prepreg from being obscured, the second fiber prepreg above the first fiber prepreg can be colorless and transparent. The second fiber prepreg below the first fiber prepreg can be colored or colorless and transparent, without limitation.

[0029] Exemplarily, the resin wrapping the fiber woven fabric may include at least one of the following: cellulose acetate, nylon, polyurethane, polycarbonate, polymethyl methacrylate, polyethylene terephthalate, epoxy resin, acrylic resin, phenolic resin, and silicone resin.

[0030] For example, the material of the fiber woven fabric may include any one of the following: glass fiber, basalt fiber, carbon fiber, aramid fiber, ceramic fiber, PET fiber, UHMWPE fiber, PBO fiber, PI fiber, polypropylene fiber, hemp fiber, bamboo fiber. Among them, the material of the fiber woven fabric is preferably glass fiber, followed by UHMWPE fiber.

[0031] For example, the thickness of a layer of the second fiber prepreg is between 0.07 and 0.15 mm. In some embodiments, the thickness of a layer of the second fiber prepreg can be between 0.08 and 0.11 mm. By limiting the thickness of the second fiber prepreg, the resulting composite material structure is within a certain range. When the composite material structure is applied to a housing, the housing thickness is kept within a certain range, preventing the housing from being too thick.

[0032] In conjunction with the first aspect, in certain implementations of the first aspect, to achieve a better visual effect, the fibers (i.e., fiber filaments) comprising the fiber cloth should not be too thick, and the maximum cross-sectional width of the fibers (i.e., fiber filaments) comprising the fiber cloth should be between 1 and 30 μm. Alternatively, to achieve a higher visual effect, the maximum cross-sectional width of the fibers comprising the fiber cloth can be between 3 and 10 μm.

[0033] For example, the cross-section of the fibers (ie, fiber filaments) constituting the fiber cloth may be solid or hollow. When the cross-section is a hollow structure, a ring-shaped bright line may be formed.

[0034] For example, the cross-sectional shape of the fibers (ie, fiber filaments) constituting the fiber cloth may be circular, square, or polygonal.

[0035] In conjunction with the first aspect, in certain implementations of the first aspect, the composite material structure further includes a first coating layer, which is located on a side of the multiple coating layers away from the fiber cloth. Exemplarily, the first coating layer includes a first texture layer, a first adhesive layer, a second texture layer, and a second adhesive layer, which are sequentially stacked. The first texture layer is an outer texture layer, which is a surface layer accessible to human hands and enhances tactile sensation. The second texture layer is an inner texture layer, which is inaccessible to human hands. The first adhesive layer and the second adhesive layer are transition adhesive layers, with the first adhesive layer connected between the first texture layer and the second texture layer, and the second adhesive layer can be connected to the first fiber prepreg. The resulting composite material structure can include, from bottom to top, the following: fiber cloth, multiple coating layers, a second adhesive layer, a second texture layer, a first adhesive layer, and a first texture layer. The fiber cloth is the innermost layer, which is inaccessible to human hands, and the first texture layer is the outermost layer, which is accessible to human hands.

[0036] For example, the second texture layer may be plated, and the deposited SiO2 / Nb2O5 or SiO2 / TiO2 may be repeated in two or more layers, and the total thickness of the plated layer on the second texture layer may be between 50-400 nm.

[0037] It should be understood that the second texture layer combined with the first fiber prepreg provided in the present application, or in other words, the second texture layer combined with the multiple coating layers provided in the present application can visually present an effect of spatial layering. The superimposed spatial effect will make the resulting composite material structure or shell more beautiful.

[0038] For example, when the first fiber prepreg and / or the second fiber prepreg are colorless and transparent, the composite material structure may further include a second coating layer, which is located on a side of the fiber cloth away from the multiple coating layers. The second coating layer is a colored coating layer. It should be understood that the second coating layer primarily serves to shield the electronic components and can also act as a base layer. For example, the base color (second coating layer) may be a uniform red, white, black, etc.

[0039] In a second aspect, a composite material structure is provided, which includes at least one layer of a first fiber prepreg, wherein the first fiber prepreg includes a fiber sheet and a resin wrapping the fiber sheet; the fiber sheet includes a fiber cloth and a plurality of coating layers located on the surface of the fiber cloth, wherein the plurality of coating layers include a metal coating and a third coating layer arranged on both sides of the metal coating.

[0040] The first fiber prepreg may be understood as a fiber composite material pre-impregnated with resin, and the first fiber prepreg may be a fiber prepreg sheet with a brightening effect.

[0041] For example, the fiber cloth can be a woven cloth, a mesh cloth, a felt cloth, or the like. The fiber cloth can be made of any of the following materials: glass fiber, basalt fiber, carbon fiber, aramid fiber, ceramic fiber, PET fiber, UHMWPE fiber, PBO fiber, PI fiber, polypropylene fiber, hemp fiber, or bamboo fiber. The fiber cloth can be colored or colorless. Glass fiber is preferred, followed by UHMWPE fiber.

[0042] For example, the fiber sheet includes a fiber cloth and multiple coating layers on the surface of the fiber cloth. The multiple coating layers on the surface of the fiber cloth can also be called effect layers (effect layers with a brightening effect). The effect layers can be obtained by coating. In other words, the fiber cloth can be coated with a number of colored coating layers or brightening and reflective effect layers, so that the resulting composite material structure can transmit bright lines or have a colored glare effect.

[0043] In embodiments of the present application, the multiple coating layers in the composite material structure may include metal coatings. Specifically, the metal coating may be applied to the surface of the fiber cloth. Due to the high reflectivity of the metal coating, the reflection of the metal component can create a bright line or shiny effect. When the composite material structure is applied to housings and electronic devices, it can enhance the appearance of the housings and electronic devices, improving their aesthetics.

[0044] It should be noted that the bright lines or sequins formed in the embodiments of the present application can be ordered or disordered. The present application does not limit this. Regular bright lines or sequins can be produced according to actual needs, or disordered bright lines or sequins can be produced.

[0045] In combination with the second aspect, in certain implementations of the second aspect, the metal coating is any one of gold, silver, aluminum, indium, nickel, titanium or chromium, and the third coating is any one of silicon dioxide, zirconium dioxide or single crystal silicon.

[0046] It should be understood that the metal coating can be made of a metal material with high reflectivity, such as gold, silver, aluminum, indium, nickel, titanium, or chromium. In addition, the third coating is located on both sides of the metal coating. The third coating is made of a relatively stable material, such as silicon dioxide, zirconium dioxide, or single crystal silicon. The third coating can protect the metal coating and prevent corrosion and oxidation of the metal coating.

[0047] Exemplarily, the plurality of coating layers may include a SiO2 / In / SiO2 stacked layer. That is, the plurality of coating layers may include three stacked layers, which may be a silicon dioxide layer, an indium layer, and a silicon dioxide layer in sequence, wherein the silicon dioxide layer is in contact with the fiber cloth.

[0048] For example, in an embodiment of the present application, the deposit can be deposited onto the surface (one side or both sides) of the fiber cloth by vacuum physical deposition. For example, the deposit can be deposited onto the surface of the glass fiber by vacuum physical deposition, and the deposit can be a SiO2 / In / SiO2 stack.

[0049] In combination with the second aspect, in certain implementations of the second aspect, the total thickness of the multiple coating layers is between 50-400 nm, and the thickness of the metal coating layer is between 2-20 nm.

[0050] It should be understood that by limiting the thickness of the multiple coating layers and the metal coating layer to an appropriate range, the effect layer can produce a better bright line or bright flake effect. In addition, the coating layer has a higher reliability and the production cost is reduced accordingly.

[0051] For example, the resin wrapping the fiber sheet may include at least one of the following: cellulose acetate, nylon, polyurethane, polycarbonate, polymethyl methacrylate, polyethylene terephthalate, epoxy resin, acrylic resin, phenolic resin, and silicone resin.

[0052] In conjunction with the second aspect, in certain implementations of the second aspect, the thickness of a layer of the first fiber prepreg is between 0.07 and 0.15 mm. In some embodiments, the thickness of a layer of the first fiber prepreg can be between 0.08 and 0.11 mm. By limiting the thickness of the first fiber prepreg, the resulting composite material structure is within a certain range. When the composite material structure is applied to a housing, the housing thickness is kept within a certain range, preventing the housing from being too thick.

[0053] In combination with the second aspect, in certain implementations of the second aspect, the resin wrapping the fiber sheet is a modified resin containing fluorine, and the refractive index of the modified resin containing fluorine is between 1.3 and 1.4.

[0054] It should be understood that the resin impregnated in the first fiber prepreg can be a fluorine-containing resin with a refractive index between 1.3 and 1.4, which is lower than the refractive index of conventional resins (which have a refractive index of approximately 1.5 to 1.6). When the human eye observes a composite material structure, air is first seen, followed by the resin, and finally the effect layer. If the refractive index of the resin is relatively high, the perceived effect of the effect layer will be significantly reduced. If the refractive index of the resin is relatively low, the bright lines or sequins of the effect layer will be more transparent, resulting in a better presentation.

[0055] Furthermore, if fluorine-containing resins are not used, the coating layer needs to be thicker (e.g., 2000nm) to maintain good visual effects. However, thicker coating layers may pose reliability risks and increase costs. Using fluorine-containing resins can reduce the coating layer thickness to 1200nm or even 1000nm, further resolving the issue of thicker effect layer coatings and reducing reliability and mass production risks.

[0056] In combination with the second aspect, in certain implementations of the second aspect, the composite material structure further includes at least one layer of second fiber prepreg stacked with the first fiber prepreg, and the second fiber prepreg includes a fiber woven fabric and a resin wrapping the fiber woven fabric.

[0057] The second fiber prepreg can be understood as a fiber composite material pre-impregnated with resin. The fiber composite material here can be a fiber woven fabric, so the second fiber prepreg can also be called a fiber prepreg fabric.

[0058] It should be noted that the second fiber prepreg is a fiber woven fabric impregnated with the resin to be cured, and the first fiber prepreg is a fiber sheet impregnated with the resin to be cured. The main difference between the two is that the materials of the impregnation layer in the resin to be cured are different. The material impregnated in the second fiber prepreg is a fiber woven fabric, and the material impregnated in the first fiber prepreg is the fiber sheet provided in this application. The fiber sheet includes multiple coating layers, and multiple coating layers can achieve a brightening effect.

[0059] Exemplarily, the composite material structure includes 2 to 8 layers, preferably 2 to 5. The first fiber prepreg can be placed in any layer, preferably in any layer from 1 to 3, and the remaining layers can be the second fiber prepreg.

[0060] Exemplarily, the second fiber prepreg may be colored, colorless and translucent, or colorless and transparent, preferably colorless and transparent.

[0061] It should be understood that in order to prevent the first fiber prepreg from being obscured, the second fiber prepreg above the first fiber prepreg should be colorless and transparent. The second fiber prepreg below the first fiber prepreg can be colored or colorless and transparent, without limitation.

[0062] Exemplarily, the resin wrapping the fiber woven fabric may include at least one of the following: cellulose acetate, nylon, polyurethane, polycarbonate, polymethyl methacrylate, polyethylene terephthalate, epoxy resin, acrylic resin, phenolic resin, and silicone resin.

[0063] For example, the material of the fiber woven fabric may include any one of the following: glass fiber, basalt fiber, carbon fiber, aramid fiber, ceramic fiber, PET fiber, UHMWPE fiber, PBO fiber, PI fiber, polypropylene fiber, hemp fiber, bamboo fiber. Among them, the material of the fiber woven fabric is preferably glass fiber, followed by UHMWPE fiber.

[0064] For example, the thickness of a layer of the second fiber prepreg is between 0.07 and 0.15 mm. In some embodiments, the thickness of a layer of the second fiber prepreg can be between 0.08 and 0.11 mm. By limiting the thickness of the second fiber prepreg, the resulting composite material structure is within a certain range. When the composite material structure is applied to a housing, the housing thickness is kept within a certain range, preventing the housing from being too thick.

[0065] In conjunction with the second aspect, in certain implementations of the second aspect, to achieve a better visual effect, the fibers (i.e., fiber filaments) comprising the fiber cloth should not be too thick, and the maximum cross-sectional width of the fibers (i.e., fiber filaments) comprising the fiber cloth should be between 1 and 30 μm. Alternatively, to achieve a higher visual effect, the maximum cross-sectional width of the fibers comprising the fiber cloth can be between 3 and 10 μm.

[0066] For example, the cross-section of the fibers (ie, fiber filaments) constituting the fiber cloth may be solid or hollow. When the cross-section is a hollow structure, a ring-shaped bright line may be formed.

[0067] For example, the cross-sectional shape of the fibers (ie, fiber filaments) constituting the fiber cloth may be circular, square, or polygonal.

[0068] In conjunction with the second aspect, in certain implementations of the second aspect, the composite material structure further includes a first coating layer, which is located on a side of the multiple coating layers away from the fiber cloth. Exemplarily, the first coating layer includes a first texture layer, a first adhesive layer, a second texture layer, and a second adhesive layer, which are sequentially stacked. The first texture layer is an outer texture layer, which is a surface layer that can be touched by human hands and can enhance tactile sensation. The second texture layer is an inner texture layer that cannot be directly touched by human hands. The first adhesive layer and the second adhesive layer are transition adhesive layers, with the first adhesive layer connected between the first texture layer and the second texture layer, and the second adhesive layer can be connected to the first fiber prepreg. The composite material structure thus formed can include, from bottom to top, the following: fiber cloth, multiple coating layers, a second adhesive layer, a second texture layer, a first adhesive layer, and a first texture layer, with the fiber cloth being the innermost layer that cannot be directly touched by human hands, and the first texture layer being the outermost layer that can be directly touched by human hands.

[0069] For example, the second texture layer may be plated, and the deposited SiO2 / Nb2O5 or SiO2 / TiO2 may be repeated in two or more layers, and the total thickness of the plated layer on the second texture layer may be between 50-400 nm.

[0070] It should be understood that the second texture layer combined with the first fiber prepreg provided in the present application, or in other words, the second texture layer combined with the multiple coating layers provided in the present application can visually present an effect of spatial layering. The superimposed spatial effect will make the resulting composite material structure or shell more beautiful.

[0071] For example, when the first fiber prepreg and / or the second fiber prepreg are colorless and transparent, the composite material structure may further include a second coating layer, which is located on a side of the fiber cloth away from the multiple coating layers. The second coating layer is a colored coating layer. It should be understood that the second coating layer primarily serves to shield the electronic components and can also act as a base layer. For example, the base color (second coating layer) may be a uniform red, white, black, etc.

[0072] According to a third aspect, a composite material structure is provided, which includes at least one layer of a first fiber prepreg, wherein the first fiber prepreg includes a fiber sheet and a resin wrapping the fiber sheet; the fiber sheet includes a fiber cloth and a hot stamping layer located on the surface of the fiber cloth, and the hot stamping layer is formed on the surface of the fiber cloth by a hot stamping process.

[0073] The first fiber prepreg may be understood as a fiber composite material pre-impregnated with resin, and the first fiber prepreg may be a fiber prepreg sheet with a brightening effect.

[0074] It can be understood that the hot stamping process uses the principle of heat pressure transfer to transfer the aluminum layer in the electrochemical aluminum to the surface of the substrate to form a special metal effect.

[0075] For example, the hot stamping layer can be formed by transferring a single side of the fiber cloth through a hot stamping process, or by transferring a double side of the fiber cloth through a hot stamping process. In other words, a metal foil material can be transferred to a fiber cloth (such as a glass fiber cloth) through a hot stamping process to form a shiny pattern. The transfer can be done on either one side or both sides. The metal foil can be aluminum foil, gold foil, silver foil, indium foil, etc., with aluminum foil and indium foil being preferred.

[0076] In embodiments of the present application, the composite material structure may include a hot stamping layer. This layer may be formed on the surface of the fiber cloth using a hot stamping process. By applying metal to the fiber cloth surface, the high reflectivity of the metal component creates a bright line or shiny effect. When the composite material structure is applied to housings and electronic devices, it can enhance the appearance of the housings and electronic devices, improving their aesthetics.

[0077] It should be noted that the bright lines or sequins formed in the embodiments of the present application can be ordered or disordered. The present application does not limit this. Regular bright lines or sequins can be produced according to actual needs, or disordered bright lines or sequins can be produced.

[0078] In combination with the third aspect, in certain implementations of the third aspect, the hot stamping layer includes any one of the following: gold, silver, aluminum, indium, nickel, titanium, and chromium; the material of the fiber cloth includes any one of the following: glass fiber, basalt fiber, carbon fiber, aramid fiber, ceramic fiber, PET fiber, UHMWPE fiber, PBO fiber, PI fiber, polypropylene fiber, hemp fiber, and bamboo fiber.

[0079] For example, the fiber cloth can be a woven cloth, or a mesh cloth, a felt cloth, etc.

[0080] In conjunction with the third aspect, in certain implementations of the third aspect, the thickness of the hot stamping layer is between 0.01 and 0.02 mm. It should be understood that by limiting the thickness of the hot stamping layer to an appropriate range, the bright lines or sequins produced by the effect layer are enhanced. Furthermore, the hot stamping layer is more reliable, and production costs are correspondingly reduced.

[0081] In conjunction with the third aspect, in certain implementations of the third aspect, the thickness of a layer of the first fiber prepreg is between 0.07 and 0.15 mm. In some embodiments, the thickness of a layer of the first fiber prepreg can be between 0.08 and 0.11 mm. By limiting the thickness of the first fiber prepreg, the resulting composite material structure is within a certain range. When the composite material structure is applied to a housing, the housing thickness is kept within a certain range, preventing the housing from being too thick.

[0082] In combination with the third aspect, in certain implementations of the third aspect, the resin wrapping the fiber sheet is a modified resin containing fluorine, and the refractive index of the modified resin containing fluorine is between 1.3 and 1.4.

[0083] It should be understood that the resin impregnated in the first fiber prepreg can be a fluorine-containing resin with a refractive index between 1.3 and 1.4, which is lower than the refractive index of conventional resins (which have a refractive index of approximately 1.5 to 1.6). When the human eye observes a composite material structure, air is first seen, followed by the resin, and finally the effect layer. If the refractive index of the resin is relatively high, the perceived effect of the effect layer will be significantly reduced. If the refractive index of the resin is relatively low, the bright lines or sequins of the effect layer will be more transparent, resulting in a better presentation.

[0084] Furthermore, if fluorine-containing resins are not used, the coating layer needs to be thicker (e.g., 2000nm) to maintain good visual effects. However, thicker coating layers may pose reliability risks and increase costs. Using fluorine-containing resins can reduce the coating layer thickness to 1200nm or even 1000nm, further resolving the issue of thicker effect layer coatings and reducing reliability and mass production risks.

[0085] In combination with the third aspect, in certain implementations of the third aspect, the composite material structure further includes at least one layer of second fiber prepreg stacked with the first fiber prepreg, and the second fiber prepreg includes a fiber woven fabric and a resin wrapping the fiber woven fabric.

[0086] The second fiber prepreg can be understood as a fiber composite material pre-impregnated with resin. The fiber composite material here can be a fiber woven fabric, so the second fiber prepreg can also be called a fiber prepreg fabric.

[0087] It should be noted that the second fiber prepreg is a fiber woven fabric impregnated with the resin to be cured, and the first fiber prepreg is a fiber sheet impregnated with the resin to be cured. The main difference between the two is that the impregnation layer materials in the resin to be cured are different. The material impregnated in the second fiber prepreg is a fiber woven fabric, and the material impregnated in the first fiber prepreg is the fiber sheet provided in this application, which includes a hot stamping layer, and the hot stamping layer can achieve a brightening effect.

[0088] Exemplarily, the composite material structure includes 2 to 8 layers, preferably 2 to 5. The first fiber prepreg can be placed in any layer, preferably in any layer from 1 to 3, and the remaining layers can be the second fiber prepreg.

[0089] Exemplarily, the second fiber prepreg may be colored, colorless and translucent, or colorless and transparent, preferably colorless and transparent.

[0090] It should be understood that in order to prevent the first fiber prepreg from being obscured, the second fiber prepreg above the first fiber prepreg should be colorless and transparent. The second fiber prepreg below the first fiber prepreg can be colored or colorless and transparent, without limitation.

[0091] Exemplarily, the resin wrapping the fiber woven fabric may include at least one of the following: cellulose acetate, nylon, polyurethane, polycarbonate, polymethyl methacrylate, polyethylene terephthalate, epoxy resin, acrylic resin, phenolic resin, and silicone resin.

[0092] For example, the material of the fiber woven fabric may include any one of the following: glass fiber, basalt fiber, carbon fiber, aramid fiber, ceramic fiber, PET fiber, UHMWPE fiber, PBO fiber, PI fiber, polypropylene fiber, hemp fiber, bamboo fiber. Among them, the material of the fiber woven fabric is preferably glass fiber, followed by UHMWPE fiber.

[0093] For example, the thickness of a layer of the second fiber prepreg is between 0.07 and 0.15 mm. In some embodiments, the thickness of a layer of the second fiber prepreg can be between 0.08 and 0.11 mm. By limiting the thickness of the second fiber prepreg, the resulting composite material structure is within a certain range. When the composite material structure is applied to a housing, the housing thickness is kept within a certain range, preventing the housing from being too thick.

[0094] In conjunction with the third aspect, in certain implementations of the third aspect, to achieve a better visual effect, the fibers (i.e., fiber filaments) comprising the fiber cloth should not be too thick, and the maximum cross-sectional width of the fibers (i.e., fiber filaments) comprising the fiber cloth should be between 1 and 30 μm. Alternatively, to achieve a higher visual effect, the maximum cross-sectional width of the fibers comprising the fiber cloth can be between 3 and 10 μm.

[0095] For example, the cross-section of the fibers (ie, fiber filaments) constituting the fiber cloth may be solid or hollow. When the cross-section is a hollow structure, a ring-shaped bright line may be formed.

[0096] For example, the cross-sectional shape of the fibers (ie, fiber filaments) constituting the fiber cloth may be circular, square, or polygonal.

[0097] In conjunction with the third aspect, in certain implementations of the third aspect, the composite material structure further includes a first coating layer, which is located on a side of the hot stamping layer away from the fiber cloth. Exemplarily, the first coating layer includes a first texture layer, a first adhesive layer, a second texture layer, and a second adhesive layer, which are sequentially stacked. The first texture layer is an outer texture layer, which is a surface layer accessible to human hands and enhances tactility. The second texture layer is an inner texture layer, which is inaccessible to human hands. The first adhesive layer and the second adhesive layer are transition adhesive layers, with the first adhesive layer connected between the first texture layer and the second texture layer, and the second adhesive layer can be connected to the first fiber prepreg. The composite material structure thus formed can include, from bottom to top, the following: fiber cloth, hot stamping layer, second adhesive layer, second texture layer, first adhesive layer, and first texture layer, with the fiber cloth being the innermost layer, inaccessible to human hands, and the first texture layer being the outermost layer, accessible to human hands.

[0098] For example, the second texture layer may be plated, and the deposited SiO2 / Nb2O5 or SiO2 / TiO2 may be repeated in two or more layers, and the total thickness of the plated layer on the second texture layer may be between 50-400 nm.

[0099] It should be understood that the second texture layer combined with the first fiber prepreg provided in the present application, or in other words, the second texture layer combined with the multiple coating layers provided in the present application can visually present an effect of spatial layering. The superimposed spatial effect will make the resulting composite material structure or shell more beautiful.

[0100] For example, when the first fiber prepreg and / or the second fiber prepreg are colorless and transparent, the composite material structure may further include a second coating layer, which is located on a side of the fiber cloth away from the first coating layer. The second coating layer is a colored coating layer. It should be understood that the second coating layer primarily serves to shield the electronic components and can also act as a base layer. For example, the base color (second coating layer) may be a uniform red, white, black, etc.

[0101] In a fourth aspect, a method for manufacturing a composite material structure is provided, which includes: obtaining a fiber cloth; setting a plurality of coating layers on the surface of the fiber cloth using a coating process, wherein the difference in refractive index between two adjacent layers of the plurality of coating layers is greater than or equal to 0.4; and pre-impregnating the fiber cloth with the plurality of coating layers in a resin to form a first fiber prepreg.

[0102] It should be understood that the first fiber prepreg formed in the above manner includes a fiber sheet and a resin wrapping the fiber sheet.

[0103] Exemplary materials for the fiber cloth include any of the following: glass fiber, basalt fiber, carbon fiber, aramid fiber, ceramic fiber, PET fiber, UHMWPE fiber, PBO fiber, PI fiber, polypropylene fiber, hemp fiber, and bamboo fiber. The fiber cloth can be colored or colorless. Glass fiber is preferred, followed by UHMWPE fiber.

[0104] Exemplary resins include at least one of the following: cellulose acetate, nylon, polyurethane, polycarbonate, polymethyl methacrylate, polyethylene terephthalate, epoxy resin, acrylic resin, phenolic resin, and silicone resin. In some embodiments, to achieve better visual effects, the resin may be a modified resin containing fluorine, wherein the refractive index of the modified resin containing fluorine is between 1.3 and 1.4.

[0105] In the embodiments of the present application, when manufacturing a composite material structure, multiple coating layers can be applied to the surface of the fiber cloth, and the refractive index difference between two adjacent coating layers is limited to 0.4 or greater. That is, by repeatedly stacking low-refractive-index materials and high-refractive-index materials, the difference in refractive index creates a difference in brightness, resulting in a bright line or sequin effect. When the composite material structure is applied to housings and electronic devices, it can enrich the appearance of the housings and electronic devices and improve their aesthetics.

[0106] In some embodiments, the manufacturing method includes: obtaining one or more of the first fiber prepregs, and stacking the one or more of the first fiber prepregs to form a composite material structure.

[0107] In conjunction with the fourth aspect, in certain implementations of the fourth aspect, providing multiple coating layers on the surface of the fiber cloth using a coating process includes: coating a first film layer on the surface of the fiber cloth, coating a second film layer on a surface of the first film layer away from the fiber cloth, coating a third film layer on a surface of the second film layer away from the fiber cloth, and coating a fourth film layer on a surface of the third film layer away from the fiber cloth. In some embodiments, a fifth film layer may further be coated on a surface of the fourth film layer away from the fiber cloth.

[0108] The first, third, and fifth film layers are the aforementioned first coating layers, and the second and fourth film layers are the aforementioned second coating layers. For example, the first coating layer may be any one of silicon dioxide (SiO2), zirconium dioxide (ZrO2), or single crystal silicon, and the second coating layer may be any one of niobium pentoxide (Nb2O5), titanium dioxide (TiO2), or silicon nitride (Si3N4).

[0109] In conjunction with the fourth aspect, in certain implementations of the fourth aspect, the manufacturing method further includes: disposing a second fiber prepreg on one side and / or both sides of the first fiber prepreg. The second fiber prepreg is manufactured using existing methods and includes a fiber woven fabric and a resin wrapped around the fiber woven fabric.

[0110] It should be understood that in order to prevent the first fiber prepreg from being obscured, the second fiber prepreg above the first fiber prepreg should be colorless and transparent. The second fiber prepreg below the first fiber prepreg can be colored or colorless and transparent, without limitation.

[0111] Exemplarily, the thickness of each layer of the second fiber prepreg and the first fiber prepreg is between 0.07 and 0.15 mm. In some embodiments, the thickness of each layer of the second fiber prepreg and the first fiber prepreg is between 0.08 and 0.11 mm. By limiting the thickness of the second fiber prepreg and the first fiber prepreg, the resulting composite material structure is within a certain range. When the composite material structure is applied to a housing, the housing thickness is kept within a certain range, preventing the housing from being too thick.

[0112] In combination with the fourth aspect, in certain implementations of the fourth aspect, the manufacturing method further includes: spraying a first coating on a side of the multiple coating layers away from the fiber cloth.

[0113] Exemplarily, the first coating layer includes a first texture layer, a first bonding layer, a second texture layer and a second bonding layer stacked in sequence. The first texture layer is an outer texture layer, which is a surface layer that can be touched by human hands and can increase the tactile sensation. The second texture layer is an inner texture layer that cannot be touched directly by human hands. The first bonding layer and the second bonding layer are transition bonding layers, the first bonding layer is connected between the first texture layer and the second texture layer, and the second bonding layer can be connected to the first fiber prepreg, so that the composite material structure formed can include, from the bottom layer to the top layer, fiber cloth, multiple coating layers, a second bonding layer, a second texture layer, a first bonding layer and a first texture layer in sequence, the fiber cloth is the innermost layer that cannot be touched directly by human hands, and the first texture layer is the outermost layer that can be touched directly by human hands.

[0114] For example, the second texture layer may be plated, and the deposited SiO2 / Nb2O5 or SiO2 / TiO2 may be repeated in two or more layers, and the total thickness of the plated layer on the second texture layer may be between 50-400 nm.

[0115] It should be understood that the second texture layer is combined with multiple coating layers, or in other words, the second texture layer is combined with multiple coating layers provided in this application, which can visually present a spatial layering effect. The superimposed spatial effect will make the resulting composite material structure or shell more beautiful.

[0116] In combination with the fourth aspect, in certain implementations of the fourth aspect, the manufacturing method further includes: spraying a second coating on a side of the fiber cloth away from the multiple coating layers.

[0117] It should be understood that if the first fiber prepreg and / or the second fiber prepreg are colorless and transparent, a second coating layer may also be sprayed on the side of the fiber cloth away from the multiple coating layers. The second coating layer is a colored coating. It should be understood that the second coating layer primarily serves to shield the electronic components and can also act as a base. For example, the base color (second coating layer) may be a uniform red, white, black, etc.

[0118] In a fifth aspect, a method for manufacturing a composite material structure is provided, which includes: obtaining a fiber cloth; coating a sixth film layer on the surface of the fiber cloth using a coating process; coating a metal coating layer on the side of the sixth film layer away from the fiber cloth using a coating process; coating a seventh film layer on the side of the metal coating layer away from the sixth film layer using a coating process; and pre-impregnating the fiber cloth with multiple coating layers (sixth film layer, metal coating layer and seventh film layer) in resin to form a first fiber prepreg.

[0119] The sixth and seventh film layers are both the third coating layer mentioned above. Exemplarily, the third coating layer is any one of silicon dioxide, zirconium dioxide or single crystal silicon, and the metal coating layer is any one of gold, silver, aluminum, indium, nickel, titanium or chromium.

[0120] It should be understood that the first fiber prepreg formed in the above manner includes a fiber sheet and a resin wrapping the fiber sheet.

[0121] Exemplary materials for the fiber cloth include any of the following: glass fiber, basalt fiber, carbon fiber, aramid fiber, ceramic fiber, PET fiber, UHMWPE fiber, PBO fiber, PI fiber, polypropylene fiber, hemp fiber, and bamboo fiber. The fiber cloth can be colored or colorless. Glass fiber is preferred, followed by UHMWPE fiber.

[0122] Exemplary resins include at least one of the following: cellulose acetate, nylon, polyurethane, polycarbonate, polymethyl methacrylate, polyethylene terephthalate, epoxy resin, acrylic resin, phenolic resin, and silicone resin. In some embodiments, to achieve better visual effects, the resin may be a modified resin containing fluorine, wherein the refractive index of the modified resin containing fluorine is between 1.3 and 1.4.

[0123] In the embodiments of the present application, when manufacturing a composite material structure, multiple coating layers (a sixth coating layer, a metal coating layer, and a seventh coating layer) can be plated on the surface of the fiber cloth. The high reflectivity of the metal coating layer among the multiple coating layers can create a bright line or shiny effect. When the composite material structure is applied to housings and electronic devices, it can enrich the appearance of the housings and electronic devices and improve their aesthetics.

[0124] In some embodiments, the manufacturing method includes: obtaining one or more of the first fiber prepregs, and stacking the one or more of the first fiber prepregs to form a composite material structure.

[0125] In conjunction with the fifth aspect, in certain implementations of the fifth aspect, the manufacturing method further includes: disposing a second fiber prepreg on one side and / or both sides of the first fiber prepreg. The second fiber prepreg is manufactured using existing methods and includes a fiber woven fabric and a resin wrapped around the fiber woven fabric.

[0126] It should be understood that in order to prevent the first fiber prepreg from being obscured, the second fiber prepreg above the first fiber prepreg should be colorless and transparent. The second fiber prepreg below the first fiber prepreg can be colored or colorless and transparent, without limitation.

[0127] Exemplarily, the thickness of each layer of the second fiber prepreg and the first fiber prepreg is between 0.07 and 0.15 mm. In some embodiments, the thickness of each layer of the second fiber prepreg and the first fiber prepreg is between 0.08 and 0.11 mm. By limiting the thickness of the second fiber prepreg and the first fiber prepreg, the resulting composite material structure is within a certain range. When the composite material structure is applied to a housing, the housing thickness is kept within a certain range, preventing the housing from being too thick.

[0128] In combination with the fifth aspect, in certain implementations of the fifth aspect, the manufacturing method further includes: spraying a first coating on a side of the seventh film layer away from the fiber cloth.

[0129] Exemplarily, the first coating layer includes a first texture layer, a first bonding layer, a second texture layer and a second bonding layer stacked in sequence. The first texture layer is an outer texture layer, which is a surface layer that can be touched by human hands and can increase the tactile sensation. The second texture layer is an inner texture layer that cannot be touched directly by human hands. The first bonding layer and the second bonding layer are transition bonding layers, the first bonding layer is connected between the first texture layer and the second texture layer, and the second bonding layer can be connected to the first fiber prepreg, so that the composite material structure formed can include, from the bottom layer to the top layer, fiber cloth, multiple coating layers, a second bonding layer, a second texture layer, a first bonding layer and a first texture layer in sequence, the fiber cloth is the innermost layer that cannot be touched directly by human hands, and the first texture layer is the outermost layer that can be touched directly by human hands.

[0130] For example, the second texture layer may be plated, and the deposited SiO2 / Nb2O5 or SiO2 / TiO2 may be repeated in two or more layers, and the total thickness of the plated layer on the second texture layer may be between 50-400 nm.

[0131] It should be understood that the second texture layer is combined with multiple coating layers (sixth film layer, metal coating layer and seventh film layer) to visually present a spatial layering effect. The superimposed spatial effect will make the resulting composite material structure or shell more beautiful.

[0132] In combination with the fifth aspect, in certain implementations of the fifth aspect, the manufacturing method further includes: spraying a second coating on a side of the fiber cloth away from the sixth film layer.

[0133] It should be understood that if the first fiber prepreg and / or the second fiber prepreg are colorless and transparent, a second coating layer may also be sprayed on the side of the fiber cloth away from the sixth film layer. This second coating layer is a colored coating layer. It should be understood that this second coating layer primarily serves to shield the electronic components and also acts as a base layer. For example, the base color (second coating layer) may be a uniform red, white, black, etc.

[0134] In the sixth aspect, a method for manufacturing a composite material structure is provided, which includes: obtaining a fiber cloth; transferring a metal foil material to the fiber cloth through a hot stamping process to form a hot stamping layer (having a bright pattern); and pre-impregnating the fiber cloth with the hot stamping layer in a resin to form a first fiber prepreg.

[0135] The hot stamping layer is any one of gold, silver, aluminum, indium, nickel, titanium or chromium. Exemplarily, the metal foil can be aluminum foil, gold foil, silver foil, indium foil, etc., preferably aluminum foil and indium foil.

[0136] It should be understood that in order to achieve a better brightening effect, the thickness of the hot stamping layer can be limited to between 0.01-0.02 mm.

[0137] It should be understood that the first fiber prepreg formed in the above manner includes a fiber sheet and a resin wrapping the fiber sheet.

[0138] Exemplary materials for the fiber cloth include any of the following: glass fiber, basalt fiber, carbon fiber, aramid fiber, ceramic fiber, PET fiber, UHMWPE fiber, PBO fiber, PI fiber, polypropylene fiber, hemp fiber, and bamboo fiber. The fiber cloth can be colored or colorless. Glass fiber is preferred, followed by UHMWPE fiber.

[0139] Exemplary resins include at least one of the following: cellulose acetate, nylon, polyurethane, polycarbonate, polymethyl methacrylate, polyethylene terephthalate, epoxy resin, acrylic resin, phenolic resin, and silicone resin. In some embodiments, to achieve better visual effects, the resin may be a modified resin containing fluorine, wherein the refractive index of the modified resin containing fluorine is between 1.3 and 1.4.

[0140] In the embodiments of the present application, when manufacturing a composite material structure, a hot stamping metal layer can be formed on the surface of the fiber cloth through a hot stamping process. The high reflectivity of the metal can create a bright line or shiny effect. When the composite material structure is applied to housings and electronic devices, it can enrich the appearance of the housings and electronic devices and improve their aesthetics.

[0141] In combination with the sixth aspect, in certain implementations of the sixth aspect, the manufacturing method includes: obtaining one or more of the first fiber prepregs, and stacking the one or more of the first fiber prepregs to form a composite material structure.

[0142] In conjunction with the sixth aspect, in certain implementations of the sixth aspect, the manufacturing method further includes: disposing a second fiber prepreg on one side and / or both sides of the first fiber prepreg. The second fiber prepreg is manufactured using existing methods and includes a fiber woven fabric and a resin wrapping the fiber woven fabric.

[0143] It should be understood that in order to prevent the first fiber prepreg from being obscured, the second fiber prepreg above the first fiber prepreg should be colorless and transparent. The second fiber prepreg below the first fiber prepreg can be colored or colorless and transparent, without limitation.

[0144] Exemplarily, the thickness of each layer of the second fiber prepreg and the first fiber prepreg is between 0.07 and 0.15 mm. In some embodiments, the thickness of each layer of the second fiber prepreg and the first fiber prepreg is between 0.08 and 0.11 mm. By limiting the thickness of the second fiber prepreg and the first fiber prepreg, the resulting composite material structure is within a certain range. When the composite material structure is applied to a housing, the housing thickness is kept within a certain range, preventing the housing from being too thick.

[0145] In combination with the sixth aspect, in certain implementations of the sixth aspect, the manufacturing method further includes: spraying a first coating on a side of the hot stamping layer away from the fiber cloth.

[0146] Exemplarily, the first coating layer includes a first texture layer, a first bonding layer, a second texture layer and a second bonding layer stacked in sequence. The first texture layer is an outer texture layer, which is a surface layer that can be touched by human hands and can increase the tactile sensation. The second texture layer is an inner texture layer that cannot be touched directly by human hands. The first bonding layer and the second bonding layer are transition bonding layers, the first bonding layer is connected between the first texture layer and the second texture layer, and the second bonding layer can be connected to the first fiber prepreg, so that the composite material structure formed can include, from the bottom layer to the top layer, fiber cloth, multiple coating layers, a second bonding layer, a second texture layer, a first bonding layer and a first texture layer in sequence, the fiber cloth is the innermost layer that cannot be touched directly by human hands, and the first texture layer is the outermost layer that can be touched directly by human hands.

[0147] For example, the second texture layer may be plated, and the deposited SiO2 / Nb2O5 or SiO2 / TiO2 may be repeated in two or more layers, and the total thickness of the plated layer on the second texture layer may be between 50-400 nm.

[0148] It should be understood that the second texture layer combined with the hot stamping layer can visually present a spatial layering effect. The superimposed spatial effect will make the resulting composite material structure or shell more beautiful.

[0149] In combination with the sixth aspect, in certain implementations of the sixth aspect, the manufacturing method further includes: spraying a second coating on a side of the fiber cloth away from the hot stamping layer.

[0150] It should be understood that if the first fiber prepreg and / or the second fiber prepreg are colorless and transparent, a second coating layer may also be sprayed on the side of the fiber cloth away from the hot stamping layer. This second coating layer is a colored coating. It should be understood that this second coating layer primarily serves to shield the electronic components and also acts as a base. For example, the base color (second coating layer) may be a uniform red, white, black, etc.

[0151] In the seventh aspect, a shell is provided, which is made of the composite material structure of the first aspect and any implementation of the first aspect, or the shell is made of the composite material structure of the second aspect and any implementation of the second aspect, or the shell is made of the composite material structure of the third aspect and any implementation of the third aspect.

[0152] In an eighth aspect, an electronic device is provided, comprising a shell, the shell being made of the composite material structure of the first aspect and any implementation of the first aspect, or the shell being made of the composite material structure of the second aspect and any implementation of the second aspect, or the shell being made of the composite material structure of the third aspect and any implementation of the third aspect.

[0153] In some embodiments, the electronic device further includes a transparent cover plate disposed on the housing. The housing and the transparent cover plate cooperate to form a housing space within which components of the electronic device, such as the display module, touch module, chip, battery, and circuit board, are located. The surface of the transparent cover plate away from the housing serves as the touch display surface of the electronic device.

[0154] Exemplarily, the electronic device may be an electronic device having a housing, for example, may include mobile terminals such as mobile phones, wearable devices, smart watches, tablet computers, e-readers, notebook computers, laptop computers, mobile computers, augmented reality devices, virtual reality devices and handheld game consoles, etc., which are not limited in this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0155] FIG1 is a schematic flow chart of a process for processing the appearance of a housing according to the present application.

[0156] FIG2 is a schematic cross-sectional view of a composite material structure provided in an embodiment of the present application.

[0157] FIG3 is a schematic cross-sectional view of another composite material structure provided in an embodiment of the present application.

[0158] FIG4 is a schematic cross-sectional view of another composite material structure provided in an embodiment of the present application.

[0159] FIG5 is a schematic diagram of the first fiber prepreg provided in an embodiment of the present application.

[0160] FIG6 is a schematic flow chart of a process for processing the appearance of a shell provided in an embodiment of the present application.

[0161] FIG7 is a schematic flow chart of another process for processing the appearance of a shell provided in an embodiment of the present application.

[0162] FIG8 is a schematic diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0163] The technical solution in this application will be described below with reference to the accompanying drawings.

[0164] In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first" and "second" can sensibly or implicitly include one or more features. In addition, in the description of the embodiments of the present application, "multiple" means two or more than two, and "at least one" and "one or more" mean one, two or more. The singular expressions "one", "a", "said", "above", "the" and "this" are intended to also include expressions such as "one or more", unless the context clearly indicates otherwise. The size of the sequence numbers of the processes below does not mean the order of execution. The order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application. For example, in the embodiments of the present application, words such as "110", "120", and "130" are merely identifiers made for the convenience of description and do not limit the order of execution of the steps. The term "and / or" is used to describe a relationship between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A alone, A and B together, and B alone. A and B can be singular or plural. The character " / " generally indicates an "or" relationship between the related objects.

[0165] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present application. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in yet other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0166] In the description of the embodiments of the present application, the terms "upper" and "lower" indicate orientations or positional relationships that are defined relative to the orientations or positions of the components schematically placed in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative descriptions and clarifications, rather than indicating or implying that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. They may change accordingly according to changes in the orientation of the components placed in the drawings, and therefore cannot be understood as limitations on the present application.

[0167] To highlight the high-end quality of electronic devices, manufacturers are increasingly focusing on the decorative design of their housings. For example, the housings can be colored to create a variety of colors. Another example is the housings can be textured to create visual effects like matte or frosted finishes.

[0168] Fiber composites, with their high strength and low density, are a key material for electronic device casings, offering advantages such as light weight and resistance to drops. However, due to the molding process and properties of fiber composites, fiber grain can be easily visible on the casing, resulting in a lackluster appearance and aesthetic appeal. This is particularly true for the back covers of high-end products like flagship phones and tablets, significantly impacting the overall aesthetics and value of the product.

[0169] Currently, the main surface treatment processes for shell materials are spray coating and rubbing, curtain coating and transfer printing, or curtain coating and rubbing. However, these traditional processes only produce a flat effect, making it difficult to achieve differentiation, and failing to provide consumers with a richer appearance and enhance the product's aesthetics.

[0170] For example, as shown in FIG1 , FIG1 shows a schematic flow chart of a process for processing the appearance of a shell.

[0171] Step 101: obtain a plurality of fiber prepregs, and the plurality of fiber prepregs may be stacked.

[0172] The fiber prepreg may also be referred to as a second fiber prepreg 110 . The second fiber prepreg 110 may be understood as a fiber composite material pre-impregnated with resin. The fiber composite material here may be a fiber woven fabric.

[0173] Exemplarily, the second fiber prepreg 110 may be a fiber woven fabric impregnated with a resin to be cured. In other words, the second fiber prepreg 110 may include a fiber woven fabric and a resin encapsulating the fiber woven fabric. The resin encapsulating the fiber woven fabric may include at least one of the following: cellulose acetate, nylon, polyurethane, polycarbonate, polymethyl methacrylate, polyethylene terephthalate, epoxy resin, acrylic resin, phenolic resin, or silicone resin, although this application does not limit this.

[0174] For example, the second fiber prepreg 110 may be colored, colorless and translucent, or colorless and transparent, and is preferably colorless and transparent.

[0175] For example, a fiber woven fabric is a fabric formed by weaving fibers together using a textile machine. This fabric can be made from a variety of fibers. For example, the fiber material included in the second fiber prepreg 110 (i.e., the material of the fiber woven fabric) can be any of the following: glass fiber, basalt fiber, carbon fiber, aramid fiber, ceramic fiber, PET fiber, UHMWPE fiber, PBO fiber, PI fiber, polypropylene fiber, hemp fiber, and bamboo fiber. The fiber woven fabric is preferably made of glass fiber, followed by UHMWPE fiber.

[0176] Step 102 : Compression-molding a plurality of stacked second fiber prepregs 110 to form a first fiber composite material shell material 120 .

[0177] Compression molding is a manufacturing process commonly used to create parts or products made of plastics, metals, and other materials. The material is heated to a softened state, then placed in a mold and subjected to high pressure to form it into the desired shape. Once cooled and solidified, the material retains the molded shape.

[0178] In this step, a plurality of stacked second fiber prepregs 110 can be heated to a softened state and then placed in a mold to form a desired shape inside the mold, such as forming a mobile phone shell as shown in FIG1 , and finally cooled and solidified to form a first fiber composite material shell material 120 (such as a mobile phone shell material).

[0179] Step 103 : spray-coating and rubbing on one side of the first fiber composite material shell material 120 to form a first coating layer 130 .

[0180] It should be understood that spraying the first coating 130 on the surface of the first fiber composite material shell material 120 can achieve a textured structure on the surface and enhance the tactile feel.

[0181] It should be noted that, in step 103 , the first coating layer 130 may be formed by spray coating and rubbing, or may be formed by flow coating and transfer printing, or flow coating and rubbing.

[0182] Among them, spray coating plus rubbing can transfer a pattern or image to a target surface. In this process, the paint is first applied evenly to the print medium using spray technology. Then, using rubbing technology, the print medium is brought into contact with the target surface and pressure is applied to transfer the paint from the medium to the target surface, forming the desired pattern or image. Flow coating plus transfer is used to transfer a pattern or image from the print medium to the target surface. In this process, the image is first printed on special transfer paper. The transfer paper is then brought into contact with the target surface (such as ceramic or glass). Pressure and heat are applied to transfer the pattern from the transfer paper to the target surface. Flow coating plus rubbing is a printing process that combines flow coating and rubbing technology. In this process, the paint is first applied evenly to the print medium using flow coating technology. Then, the print medium is brought into contact with the target surface and pressure is applied to transfer the paint from the medium to the target surface. Rubbing may be used during this process to ensure accurate transfer of the pattern.

[0183] Step 104 : cutting the first fiber composite material shell material 120 and the first coating 130 to form a shell 140 .

[0184] It should be noted that the shape of the first fiber composite housing material 120 formed in step 102 may differ from the shape of the actual electronic device housing to be produced. The shape after molding is not precise, so it may need to be cut according to the final shape. For example, the camera area of ​​a mobile phone may need to be hollowed out. After step 104, the final mobile phone housing is formed and can be directly assembled into the mobile phone.

[0185] From the above processing steps, it can be seen that since the color brightness of the basic material (second fiber prepreg 110) constituting the shell is single, the laminate composed of the second fiber prepreg is integrated and the color is uniform (such as pure black, pure white, etc.), so the shell finally formed is an integrated effect, which cannot achieve richer effects, difficult to achieve differentiation, and cannot bring consumers richer appearance effects and enhance the appearance of the product.

[0186] Therefore, the present application provides a composite material structure, a shell and an electronic device. The composite material structure can achieve bright lines or a glare effect. When the composite material structure is applied to the shell and the electronic device, it can enrich the appearance effect of the shell and the electronic device and improve the appearance of the shell and the electronic device.

[0187] 2 to 5 are schematic cross-sectional views of three composite material structures provided in embodiments of the present application.

[0188] The composite material structure provided in the present application may include at least one layer of a first fiber prepreg 210, and the first fiber prepreg 210 may include a fiber sheet 212 and a resin 211 wrapping the fiber sheet, wherein the first fiber prepreg 210 can be understood as a fiber material pre-impregnated with resin, and the fiber material here can be the fiber sheet 212 of the present application, and the first fiber prepreg 210 can be a fiber prepreg sheet with a brightening effect.

[0189] It should be understood that the fiber sheet 212 can be formed on the surface of the fiber cloth 2120 through a coating process, or can be formed through a hot stamping process.

[0190] In some embodiments, as shown in FIG2 , the fiber sheet 212 includes a fiber cloth 2120 and multiple coating layers disposed on the surface of the fiber cloth 2120, wherein the difference in refractive index between two adjacent coating layers is greater than or equal to 0.4. The fiber cloth 2120 may be a woven fabric, a mesh, a felt, or the like. The fiber cloth 2120 may be colored or colorless.

[0191] Illustratively, the fiber sheet 212 includes a fiber cloth 2120 and multiple coating layers on the surface of the fiber cloth. The multiple coating layers on the surface of the fiber cloth can also be referred to as effect layers (effect layers having a brightening effect), which can be obtained by coating. In other words, the fiber cloth 2120 can be coated with a number of colored coating layers or brightening and reflective effect layers, so that the resulting composite material structure can produce bright lines or a colored glare.

[0192] In this embodiment, by limiting the refractive index difference between two adjacent layers of the multiple coating layers in the composite material structure to 0.4 or above, that is, by repeatedly stacking low-refractive index materials and high-refractive index materials in sequence, a difference in brightness is formed by the difference in refractive index, thereby forming a bright line or sequin effect. When the composite material structure is applied to a housing and an electronic device, it can enrich the appearance of the housing and the electronic device and improve the appearance of the housing and the electronic device.

[0193] For example, as shown in FIG2 , the multiple coating layers may include multiple first coating layers and multiple second coating layers alternately stacked, with the total thickness of the first coating layers and the second coating layers being between 600 nm and 2000 nm, i.e., the total thickness of the multiple coating layers is between 600 nm and 2000 nm. For example, the first coating layer may be in contact with the fiber cloth 2120, i.e., the first film layer 2121 is first coated on the fiber cloth, followed by the second film layer 2122, then the third film layer 2123, and finally the fourth film layer 2124, in this order. The first film layer 2121 and the third film layer 2123 are the first coating layer, and the second film layer 2122 and the fourth film layer 2124 are the second coating layer.

[0194] It should be understood that by limiting the thickness of the multiple coating layers to a suitable range, the effect of the bright lines or sequins presented by the effect layer can be improved. In addition, the reliability of the coating layer is higher and the production cost is correspondingly reduced.

[0195] Exemplarily, the first coating layer may be any one of silicon dioxide (SiO2), zirconium dioxide (ZrO2) or single crystal silicon, and the second coating layer may be any one of niobium pentoxide (Nb2O5), titanium dioxide (TiO2) or silicon nitride (Si3N4).

[0196] For example, the multiple coating layers may include two or more layers of SiO2 / Nb2O5, or two or more layers of SiO2 / TiO2. That is, the multiple coating layers may include at least four layers, which may be a stack of SiO2 / Nb2O5 / SiO2 / Nb2O5 or a stack of SiO2 / TiO2 / SiO2 / TiO2, and the difference in refractive index between two adjacent layers is greater than or equal to 0.4.

[0197] In some examples, to achieve a better visual effect of bright lines or sequins, a fifth film layer may be provided on the side of the fourth coating layer 2124 away from the fiber cloth 2120. In other words, the multiple coating layers may include five stacked layers, which may be a stack of SiO2 / Nb2O5 / SiO2 / Nb2O5 / SiO2 or a stack of SiO2 / TiO2 / SiO2 / TiO2 / SiO2, and the difference in refractive index between two adjacent layers may be greater than or equal to 0.4.

[0198] For example, in an embodiment of the present application, the deposit can be deposited onto the surface (one side or both sides) of the fiber cloth by vacuum physical deposition. For example, it can be deposited onto the surface of the glass fiber by vacuum physical deposition, and the deposit can be SiO2 / Nb2O5 or SiO2 / TiO2 repeated in 2 or more groups of layers.

[0199] In some embodiments, as shown in FIG3 , the fiber sheet 212 includes a fiber cloth 2120 and multiple coating layers located on the surface of the fiber cloth 2120. The multiple coating layers include a metal coating 2125 and a third coating layer disposed on both sides of the metal coating (the third coating layer includes a sixth coating layer 2126 and a seventh coating layer 2127). The fiber cloth 2120 may be a woven fabric, a mesh, a felt fabric, or the like. The fiber cloth 2120 may be colored or colorless.

[0200] In this embodiment, the multiple coating layers in the composite material structure may include metal coatings. Specifically, the metal coating may be applied to the surface of the fiber cloth. Due to the high reflectivity of the metal coating, the reflection of the metal component can create a bright line or shiny effect. When the composite material structure is applied to housings and electronic devices, it can enhance the appearance of the housings and electronic devices, improving their aesthetics.

[0201] Exemplarily, the metal coating 2125 may be any one of gold, silver, aluminum, indium, nickel, titanium or chromium, and the third coating may be any one of silicon dioxide, zirconium dioxide or single crystal silicon.

[0202] It should be understood that the metal coating 2125 can be made of a metal material with high reflectivity, such as gold, silver, aluminum, indium, nickel, titanium, or chromium. In addition, a third coating layer is located on both sides of the metal coating 2125. The third coating layer is made of a relatively stable material, such as silicon dioxide, zirconium dioxide, or single crystal silicon. The third coating layer can protect the metal coating 2125 and prevent corrosion and oxidation.

[0203] For example, as shown in FIG3 , the plurality of coating layers may include three stacked layers, sequentially including a sixth film layer 2126, a metal coating layer 2125, and a seventh film layer 2127, with the sixth film layer 2126 in contact with the fiber cloth 2120. For example, the plurality of coating layers may include a SiO2 / In / SiO2 stacked layer. That is, the plurality of coating layers may include three stacked layers, sequentially including a silicon dioxide layer, an indium layer, and a silicon dioxide layer, with the silicon dioxide layer in contact with the fiber cloth 2120.

[0204] In an embodiment of the present application, the deposit can be deposited onto the surface (one side or both sides) of the fiber cloth 2120 by vacuum physical deposition. For example, the deposit can be deposited onto the surface of the glass fiber by vacuum physical deposition, and the deposit can be a SiO2 / In / SiO2 laminate.

[0205] Exemplarily, the total thickness of the plurality of coating layers is between 50-400 nm, that is, the total thickness of the metal coating layer 2125, the sixth film layer 2126, and the seventh film layer 2127 is between 50-400 nm. The thickness of the metal coating layer 2125 is between 2-20 nm.

[0206] It should be understood that by limiting the thickness of the multiple coating layers and the thickness of the metal coating layer 2125 to an appropriate range, the bright line or sequin effect of the effect layer is improved. In addition, the reliability of the coating layer is higher and the production cost is correspondingly reduced.

[0207] In some embodiments, as shown in FIG. 4 , the fiber sheet 212 includes a fiber cloth 2120 and a hot stamping layer 2128 located on the surface of the fiber cloth 2120 . The hot stamping layer 2128 is formed on the surface of the fiber cloth 2120 through a hot stamping process.

[0208] It should be understood that the hot stamping process uses the principle of heat pressure transfer to transfer the aluminum layer in the electroplated aluminum to the surface of the substrate to form a special metal effect.

[0209] In this embodiment, the composite material structure may include a hot stamping layer. This layer can be formed on the surface of the fiber cloth using a hot stamping process. By hot stamping the fiber cloth with metal, the high reflectivity of the metal component creates a bright line or shiny effect. When the composite material structure is applied to housings and electronic devices, it can enrich the appearance of the housings and electronic devices, improving their aesthetics.

[0210] For example, the hot stamping layer 2128 can be formed by transferring a single side of the fiber cloth 2120 through a hot stamping process, or by transferring a double side of the fiber cloth 2120 through a hot stamping process. In other words, a metal foil material can be transferred to a fiber cloth (such as a glass fiber cloth) through a hot stamping process to form a shiny pattern. The transfer can be done on either one side or both sides. The metal foil can be aluminum foil, gold foil, silver foil, indium foil, etc., with aluminum foil and indium foil being preferred.

[0211] Exemplarily, the hot stamping layer 2128 may include any one of the following: gold, silver, aluminum, indium, nickel, titanium, and chromium.

[0212] Exemplarily, the thickness of the hot stamping layer 2128 is between 0.01 and 0.02 mm. It should be understood that by limiting the thickness of the hot stamping layer 2128 to a suitable range, the bright lines or sequins produced by the effect layer can be enhanced. Furthermore, the reliability of the hot stamping layer 2128 is increased, and production costs are correspondingly reduced.

[0213] In some examples, the resin 211 wrapping the fiber sheet may include at least one of the following: cellulose acetate, nylon, polyurethane, polycarbonate, polymethyl methacrylate, polyethylene terephthalate, epoxy resin, acrylic resin, phenolic resin, and silicone resin.

[0214] For example, the resin 211 wrapping the fiber sheet may be a modified resin containing fluorine, and the refractive index of the modified resin containing fluorine is between 1.3 and 1.4.

[0215] It should be understood that the impregnated resin 211 in the first fiber prepreg 210 can be a fluorine-containing resin with a refractive index between 1.3 and 1.4, which is lower than the refractive index of conventional resins (which have a refractive index of approximately 1.5 to 1.6). When the human eye observes a composite material structure, the air is first seen, followed by the resin, and finally the effect layer. If the refractive index of the resin is relatively high, the effect of the effect layer will be significantly reduced. If the refractive index of the resin is relatively low, the bright lines or sequins of the effect layer will be more transparent and the effect will be better.

[0216] Furthermore, if fluorine-containing resins are not used, the coating layer needs to be thicker (e.g., 2000nm) to maintain good visual effects. However, thicker coating layers may pose reliability risks and increase costs. Using fluorine-containing resins can reduce the coating layer thickness to 1200nm or even 1000nm, further resolving the issue of thicker effect layer coatings, thereby reducing reliability and mass production risks and lowering costs.

[0217] In some examples, the material of fiber cloth 2120 can include any of the following: glass fiber, basalt fiber, carbon fiber, aramid fiber, ceramic fiber, PET fiber, UHMWPE fiber, PBO fiber, PI fiber, polypropylene fiber, hemp fiber, and bamboo fiber. Among them, the material of fiber cloth 2120 is preferably glass fiber, followed by UHMWPE fiber.

[0218] It should be noted that the bright lines or sequins in the three structures shown in FIG2 can be ordered or disordered, and this application does not limit this. For example, they can be made into regular bright lines or sequins or disordered bright lines or sequins according to actual needs.

[0219] For example, as shown in Figure 5, Figure 5 shows a schematic top view of the first fiber prepreg 210. The first fiber prepreg 210 may be composed of a resin to be cured 211 and fiber sheets 212, and the fiber sheets 212 may be ordered or disordered.

[0220] In one example, as shown in FIG. 5( a ), the fiber sheets 212 may be arranged in a unidirectional manner and may form a disordered light effect.

[0221] In one example, as shown in FIG. 5( b ), the fiber sheets 212 may be arranged in bundles to form an orderly light effect.

[0222] In one example, as shown in FIG. 5( c ), the fiber sheets 212 may be arranged in multiple directions and may form a bright line composition.

[0223] In some examples, the composite material structure may further include at least one layer of second fiber prepreg 110 stacked with the first fiber prepreg 210 , wherein the second fiber prepreg 110 includes a fiber woven fabric and a resin wrapping the fiber woven fabric.

[0224] The second fiber prepreg 110 may be understood as a fiber composite material pre-impregnated with resin. The fiber composite material here may be a fiber woven fabric, so the second fiber prepreg may also be called a fiber prepreg fabric.

[0225] It should be noted that the second fiber prepreg 110 is a fiber woven fabric impregnated with the resin to be cured, and the first fiber prepreg 210 is a fiber sheet impregnated with the resin to be cured. The main difference between the two is that the impregnation layer materials in the resin to be cured are different. The material impregnated in the second fiber prepreg 110 is a fiber woven fabric, and the material impregnated in the first fiber prepreg 210 is the fiber sheet provided in this application. The fiber sheet includes multiple coating layers or hot stamping layers, and multiple coating layers or hot stamping layers can achieve a brightening effect.

[0226] Exemplarily, the composite material structure includes 2 to 8 layers, preferably 2 to 5. The first fiber prepreg 210 can be placed in any layer, preferably any layer from 1 to 3, and the remaining layers can be the second fiber prepreg 110.

[0227] It should be understood that the second fiber prepreg 110 above the first fiber prepreg 210 should be colorless and transparent to prevent obstruction of the first fiber prepreg 210. The second fiber prepreg 110 below the first fiber prepreg 210 can be colored or colorless and transparent, without limitation.

[0228] It should be noted that, for the relevant description of the second fiber prepreg 110 , reference may be made to the relevant description in FIG. 1 .

[0229] In some examples, the thickness of a single layer of second fiber prepreg 110 and / or a single layer of first fiber prepreg 210 is between 0.07 and 0.15 mm. In some embodiments, the thickness of a single layer of second fiber prepreg 110 and / or a single layer of first fiber prepreg 210 can be between 0.08 and 0.11 mm. By limiting the thickness of a single layer of second fiber prepreg 110 and / or first fiber prepreg 210, the resulting composite material structure is within a certain range. When the composite material structure is applied to a housing, the housing thickness is kept within a certain range, preventing the housing from being too thick.

[0230] In some examples, to achieve a better visual effect, the fibers (i.e., fiber filaments) comprising the fiber cloth should not be too thick, and the maximum cross-sectional width of the fibers (i.e., fiber filaments) comprising the fiber cloth should be between 1 and 30 μm. Alternatively, to achieve a higher visual effect, the maximum cross-sectional width of the fibers comprising the fiber cloth can be between 3 and 10 μm.

[0231] For example, the cross-section of the fibers (ie, fiber filaments) constituting the fiber cloth may be solid or hollow. When the cross-section is a hollow structure, a ring-shaped bright line may be formed.

[0232] For example, the cross-sectional shape of the fibers (ie, fiber filaments) constituting the fiber cloth may be circular, square, or polygonal.

[0233] In some examples, the composite structure may further include a first coating layer located on the side of the multiple coating layers away from the fiber cloth 2120. Exemplarily, the first coating layer includes a first texture layer, a first adhesive layer, a second texture layer, and a second adhesive layer stacked in sequence. The first texture layer is the outer texture layer, which is accessible to human hands and enhances tactility. The second texture layer is the inner texture layer, which is inaccessible to human hands. The first adhesive layer and the second adhesive layer serve as transition adhesive layers. The first adhesive layer is connected between the first and second texture layers, and the second adhesive layer can be connected to the first fiber prepreg 210, thereby forming the composite structure. Exemplarily, the composite structure may include, from bottom to top, the following: fiber cloth 2120, multiple coating layers, a second adhesive layer, a second texture layer, a first adhesive layer, and a first texture layer. The fiber cloth 2120 is the innermost layer, inaccessible to human hands, while the first texture layer is the outermost layer, accessible to human hands.

[0234] For example, the second texture layer may be plated, and the deposited SiO2 / Nb2O5 or SiO2 / TiO2 may be repeated in two or more layers, and the total thickness of the plated layer on the second texture layer may be between 50-400 nm.

[0235] It should be understood that the second texture layer is combined with the first fiber prepreg 210 provided in the present application, or in other words, the second texture layer is combined with the multiple coating layers or hot stamping layers provided in the present application, which can visually present a spatial layering effect. The superimposed spatial effect will make the resulting composite material structure or shell more beautiful.

[0236] In some examples, when the first fiber prepreg 210 and / or the second fiber prepreg 110 are colorless and transparent, the composite material structure may further include a second coating layer, which is located on a side of the fiber cloth 2120 away from the multiple coating layers. The second coating layer is a colored coating layer. It should be understood that the second coating layer primarily serves to shield the electronic components and can also act as a base layer. For example, the base color (second coating layer) may be a uniform red, white, black, etc.

[0237] The above describes three composite material structures provided in the embodiments of the present application in combination with Figures 2 to 5. For the above composite material structures, the embodiments of the present application also provide corresponding methods for manufacturing composite material structures.

[0238] In one implementation, the present application provides a method 1 for manufacturing a composite material structure: obtaining a fiber cloth 2120; setting multiple coating layers on the surface of the fiber cloth 2120 using a coating process, and the difference in refractive index between two adjacent layers in the multiple coating layers is greater than or equal to 0.4; pre-impregnating the fiber cloth with multiple coating layers in a resin 211 to form a first fiber prepreg 210.

[0239] In some embodiments, the manufacturing method 1 may further include: obtaining one or more first fiber prepregs 210 , and stacking the one or more first fiber prepregs 210 to form a composite material structure.

[0240] In some embodiments, forming multiple coating layers on the surface of the fiber cloth using a coating process may specifically include: coating a first film layer 2121 on the surface of the fiber cloth 2120, coating a second film layer 2122 on the surface of the first film layer 2121 away from the fiber cloth 2120, coating a third film layer 2123 on the surface of the second film layer 2122 away from the fiber cloth 2120, and coating a fourth film layer 2124 on the surface of the third film layer 2123 away from the fiber cloth 2120. It should be understood that the multiple coating layers include the first film layer 2121, the second film layer 2122, the third film layer 2123, and the fourth film layer 2124.

[0241] For example, to achieve a better visual effect of bright lines, a fifth film layer may be deposited on the surface of the fourth film layer 2124 away from the fiber cloth 2120. It should be understood that the multiple deposited film layers may include a first film layer 2121, a second film layer 2122, a third film layer 2123, a fourth film layer 2124, and a fifth film layer.

[0242] The first film layer 2121, the third film layer 2123, and the fifth film layer are the aforementioned first coating layer, and the second film layer 2122 and the fourth film layer 2124 are the aforementioned second coating layer. For example, the first coating layer may be any one of silicon dioxide, zirconium dioxide, or single crystal silicon, and the second coating layer may be any one of niobium pentoxide, titanium dioxide, or silicon nitride.

[0243] In some embodiments, the manufacturing method 1 may further include: arranging a second fiber prepreg 110 on one side and / or both sides of the first fiber prepreg 210. For a detailed description of the second fiber prepreg 110, reference may be made to the relevant description in FIG. 1 .

[0244] It should be understood that the second fiber prepreg 110 above the first fiber prepreg 210 may be colorless and transparent to prevent obstruction of the first fiber prepreg 210. The second fiber prepreg 110 below the first fiber prepreg 210 may be colored or colorless and transparent, without limitation.

[0245] In some embodiments, the manufacturing method 1 may further include: spraying a first coating layer on a side of the plurality of coating layers (or the fourth film layer 2124 ) away from the fiber cloth 2120 .

[0246] For example, the first coating layer may refer to the first coating layer 130 in FIG. 1 , FIG. 6 , and FIG. 7 .

[0247] It should be understood that the first coating layer may include a first texture layer, a first adhesive layer, a second texture layer and a second adhesive layer stacked in sequence. The first texture layer is an outer texture layer, which is a surface layer that can be touched by human hands and can increase the tactile sensation. The second texture layer is an inner texture layer that cannot be touched directly by human hands. The first adhesive layer and the second adhesive layer are transition adhesive layers, and the first adhesive layer is connected between the first texture layer and the second texture layer. The second adhesive layer can be connected to the first fiber prepreg 210, so that the composite material structure formed may include, from the bottom layer to the top layer, fiber cloth 2120, multiple coating layers, a second adhesive layer, a second texture layer, a first adhesive layer and a first texture layer. The fiber cloth 2120 is the innermost layer and cannot be touched directly by human hands. The first texture layer is the outermost layer and can be touched directly by human hands.

[0248] It should be understood that the second texture layer is combined with multiple coating layers to visually present a spatial layering effect. The superimposed spatial effect will make the resulting composite material structure or shell more beautiful.

[0249] In some embodiments, the manufacturing method 1 may further include: spraying a second coating layer on a side of the fiber cloth 2120 away from the multiple coating layers (or the first film layer 2121 ).

[0250] For example, the second coating layer may refer to the second coating layer 310 in FIG. 7 .

[0251] It should be understood that when the first fiber prepreg 210 and / or the second fiber prepreg 110 are colorless and transparent, a second coating layer may be sprayed on the side of the fiber cloth 2120 away from the multiple coating layers (or the first film layer 2121). The second coating layer is a colored coating. It should be understood that the second coating layer primarily serves to shield the electronic components and can also act as a base. For example, the base color (second coating layer) can be a uniform red, white, black, etc.

[0252] It should be noted that the composite material structure as shown in FIG. 2 can be manufactured by the above-mentioned method 1 for manufacturing a composite material structure.

[0253] In another implementation, the present application provides a method 2 for manufacturing a composite material structure: obtaining a fiber cloth 2120; coating a sixth film layer 2126 on the surface of the fiber cloth 2120 by a coating process; coating a metal coating layer 2125 on the side of the sixth film layer 2126 away from the fiber cloth 2120 by a coating process; coating a seventh film layer 2127 on the side of the metal coating layer 2125 away from the fiber cloth 2120 by a coating process; pre-impregnating the fiber cloth 2120 with multiple coating layers (the multiple coating layers include the sixth film layer 2126, the metal coating layer 2125 and the seventh film layer 2127) in a resin 211 to form a first fiber prepreg 210.

[0254] The sixth film layer 2126 and the seventh film layer 2127 are both the third coating layer. For example, the third coating layer can be any one of silicon dioxide, zirconium dioxide, or single crystal silicon, and the metal coating layer 2125 can be any one of gold, silver, aluminum, indium, nickel, titanium, or chromium.

[0255] In some embodiments, the manufacturing method 2 may include: obtaining one or more first fiber prepregs 210 , and stacking the one or more first fiber prepregs 210 to form a composite material structure.

[0256] In some embodiments, the manufacturing method 2 may further include: disposing a second fiber prepreg 110 on one side and / or both sides of the first fiber prepreg 210. The second fiber prepreg 110 is manufactured using an existing method. For a detailed description of the second fiber prepreg 110, reference may be made to the relevant description in FIG1 .

[0257] It should be understood that the second fiber prepreg 110 above the first fiber prepreg 210 should be colorless and transparent to prevent obstruction of the first fiber prepreg 210. The second fiber prepreg 110 below the first fiber prepreg 210 can be colored or colorless and transparent, without limitation.

[0258] In some embodiments, the manufacturing method 2 may further include: spraying a first coating layer on a side of the plurality of coating layers (or the seventh film layer 2127 ) away from the fiber cloth 2120 .

[0259] For example, the first coating layer may refer to the first coating layer 130 in FIG. 1 , FIG. 6 , and FIG. 7 .

[0260] It should be understood that the first coating layer may include a first texture layer, a first bonding layer, a second texture layer and a second bonding layer stacked in sequence. The first texture layer is an outer texture layer, which is a surface layer that can be touched by human hands, and the outer texture layer can increase the tactile feel. The second texture layer is an inner texture layer that cannot be touched directly by human hands. The first bonding layer and the second bonding layer are transition bonding layers, and the first bonding layer is connected between the first texture layer and the second texture layer. The second bonding layer can be connected to the first fiber prepreg, so that the composite material structure formed can include, from the bottom layer to the top layer, fiber cloth, multiple coating layers, a second bonding layer, a second texture layer, a first bonding layer and a first texture layer. The fiber cloth is the innermost layer and cannot be touched directly by human hands. The first texture layer is the outermost layer and can be touched directly by human hands.

[0261] It should be understood that the second texture layer is combined with multiple coating layers to visually present a spatial layering effect. The superimposed spatial effect will make the resulting composite material structure or shell more beautiful.

[0262] In some embodiments, the manufacturing method 2 may further include: spraying a second coating layer on a side of the fiber cloth 2120 away from the multiple coating layers (or the sixth film layer 2126 ).

[0263] For example, the second coating layer may refer to the second coating layer 310 in FIG. 7 .

[0264] It should be understood that when the first fiber prepreg 210 and / or the second fiber prepreg 110 are colorless and transparent, a second coating layer may be sprayed on the side of the fiber cloth 2120 away from the multiple coating layers (or the sixth film layer 2126). The second coating layer is a colored coating. It should be understood that the second coating layer primarily serves to shield the electronic components and can also act as a base. For example, the base color (second coating layer) can be a uniform red, white, black, etc.

[0265] It should be noted that the composite material structure as shown in FIG. 3 can be manufactured by the above-mentioned method 2 for manufacturing a composite material structure.

[0266] In another implementation, the present application provides a method 3 for manufacturing a composite material structure: obtaining a fiber cloth 2120; transferring a metal foil material to the fiber cloth 2120 through a hot stamping process to form a hot stamping layer 2128 (having a bright pattern); pre-impregnating the fiber cloth with the hot stamping layer 2128 in a resin 211 to form a first fiber prepreg 210.

[0267] The hot stamping layer 2128 may be any one of gold, silver, aluminum, indium, nickel, titanium or chromium. For example, the metal foil may be aluminum foil, gold foil, silver foil, indium foil, etc., preferably aluminum foil and indium foil.

[0268] It should be understood that in order to achieve a better brightening effect, the thickness of the hot stamping layer can be limited to between 0.01-0.02 mm.

[0269] In some embodiments, the manufacturing method 3 may include: obtaining one or more first fiber prepregs 210 , and stacking the one or more first fiber prepregs 210 to form a composite material structure.

[0270] In some embodiments, the manufacturing method 3 may further include: disposing a second fiber prepreg 110 on one side and / or both sides of the first fiber prepreg 210. The second fiber prepreg 110 is manufactured using an existing method. For a detailed description of the second fiber prepreg 110, please refer to the relevant description in FIG1 .

[0271] It should be understood that the second fiber prepreg 110 above the first fiber prepreg 210 should be colorless and transparent to prevent obstruction of the first fiber prepreg 210. The second fiber prepreg 110 below the first fiber prepreg 210 can be colored or colorless and transparent, without limitation.

[0272] In some embodiments, the manufacturing method 3 may further include: spraying a first coating on a side of the hot stamping layer 2128 away from the fiber cloth 2120 .

[0273] For example, the first coating layer may refer to the first coating layer 130 in FIG. 1 , FIG. 6 , and FIG. 7 .

[0274] It should be understood that the first coating layer may include a first texture layer, a first adhesive layer, a second texture layer and a second adhesive layer stacked in sequence. The first texture layer is an outer texture layer, which is a surface layer that can be touched by human hands and can increase the tactile sensation. The second texture layer is an inner texture layer that cannot be touched directly by human hands. The first adhesive layer and the second adhesive layer are transition adhesive layers, and the first adhesive layer is connected between the first texture layer and the second texture layer. The second adhesive layer can be connected to the first fiber prepreg 210, so that the composite material structure formed can include, from the bottom layer to the top layer, the following: fiber cloth 2120, hot stamping layer 2128, second adhesive layer, second texture layer, first adhesive layer and first texture layer. The fiber cloth is the innermost layer and cannot be touched directly by human hands. The first texture layer is the outermost layer and can be touched directly by human hands.

[0275] It should be understood that the second texture layer is combined with multiple coating layers to visually present a spatial layering effect. The superimposed spatial effect will make the resulting composite material structure or shell more beautiful.

[0276] In some embodiments, the manufacturing method 3 may further include: spraying a second coating layer on a side of the fiber cloth 2120 away from the first coating layer.

[0277] For example, the second coating layer may refer to the second coating layer 310 in FIG. 7 .

[0278] It should be understood that when the first fiber prepreg 210 and / or the second fiber prepreg 110 are colorless and transparent, a second coating layer may be sprayed on the side of the fiber cloth 2120 away from the first coating layer. The second coating layer is a colored coating layer. It should be understood that the second coating layer primarily serves to shield the electronic components and also acts as a base layer. For example, the base color (second coating layer) may be a uniform red, white, black, etc.

[0279] It should be noted that the composite material structure as shown in FIG. 4 can be manufactured by the above-mentioned method 3 for manufacturing a composite material structure.

[0280] Based on the above, the present application further provides a housing, which may include a composite material structure as shown in Figures 2 to 4. That is, the housing can be processed and manufactured from the composite material structure as shown in Figures 2 to 4. The composite material structure can be manufactured using the above-mentioned manufacturing methods 1 to 3. The following, in conjunction with Figures 6 and 7, illustrates an exemplary processing method for the housing provided in the present application.

[0281] FIG6 is a schematic flow chart of a process for processing the appearance of a shell provided in an embodiment of the present application.

[0282] Step 201 : Obtain a first fiber prepreg 210 and a second fiber prepreg 110 .

[0283] The number of the first fiber prepregs 210 and the second fiber prepregs 110 may be one or more. In this embodiment, the number of the second fiber prepregs 110 is three and the number of the first fiber prepregs 210 is two for illustration.

[0284] It should be noted that, for the relevant description of the second fiber prepreg 110 , reference may be made to the relevant description in FIG. 1 , and for the relevant description of the first fiber prepreg 210 , reference may be made to the relevant description in FIG. 2 to FIG. 5 .

[0285] In step 202 , the first fiber prepreg 210 and the second fiber prepreg 110 are stacked and compression molded to form a second fiber composite material shell material 220 .

[0286] In this step, the second fiber prepreg 110 and the first fiber prepreg 210 are stacked to form a laminate. The number of layers in the laminate can be 2-8, preferably 2-5. The first fiber prepreg 210 can be located in any layer of the laminate, preferably in one of the first to third layers of the laminate.

[0287] It should be understood that the second fiber prepreg 110 above the first fiber prepreg 210 is colorless and transparent to prevent the upper second fiber prepreg 110 from obstructing the lower first fiber prepreg 210, thereby obscuring the brightness and spatial layering effect of the shell. The second fiber prepreg 110 below the first fiber prepreg 210 can be colored or colorless and transparent, and this application does not limit this.

[0288] In this step, the stacked second fiber prepreg 110 and the first fiber prepreg 210 can be heated to a softened state and then placed in a mold to form a desired shape inside the mold, such as forming a mobile phone shell as shown in Figure 2, and finally cooled and solidified to form a second fiber composite material shell material 220 (such as a mobile phone shell material).

[0289] For other contents in this step, please refer to step 102 and will not be described again here.

[0290] Step 203 : spray-coating and rubbing on one side of the second fiber composite material shell material 220 to form a first coating layer 130 .

[0291] Exemplarily, the sprayed first coating 130 includes at least four layers. The first layer (i.e., the outer texture) is printed on the first layer to enhance the tactile feel of the touch. The second layer (i.e., the inner texture) is printed on the third layer. The inner texture, when combined with the fiber sheet 212, creates an additive effect, creating a sense of spatial layering. A coating is then applied on the second layer. The first and third layers are colorless and transparent, while the second and fourth layers are colored, translucent, or colorless and transparent. The coating deposit can be a stack of two or more SiO2 / Nb2O5 or SiO2 / TiO2 layers, with a total thickness of 50-400 nm.

[0292] Step 204 : cutting the first fiber composite material shell material 120 and the first coating 130 to form a first shell 230 .

[0293] The specific contents of step 203 and step 204 may refer to step 103 and step 104 respectively, and will not be repeated here.

[0294] In the embodiment of the present application, by adding the first fiber prepreg 210, that is, in the multi-layer laminate structure, through the composite structure of the effect fiber layer and the rubbing texture layer, the spatial effect of the fiber composite material back cover is achieved, the appearance of the fiber composite material when used in the back cover is improved, and a differentiated effect is formed.

[0295] FIG7 is a schematic flow chart of another process for processing the appearance of a shell provided in an embodiment of the present application.

[0296] Step 301 : Obtain a first fiber prepreg 210 and a second fiber prepreg 110 .

[0297] In step 302 , the first fiber prepreg 210 and the second fiber prepreg 110 are stacked and compression molded to form a second fiber composite material shell material 220 .

[0298] Step 303 : spray-coating and rubbing on one side of the second fiber composite material shell material 220 to form a first coating layer 130 .

[0299] The specific contents of steps 301 to 303 may refer to steps 201 to 203 respectively, and will not be repeated here.

[0300] In step 304 , ink is sprayed on the other side of the second fiber composite material shell material 220 to form a second coating layer 310 .

[0301] It should be noted that when the first coating 130 and the second fiber composite shell material 220 are both colorless and transparent, ink can be sprayed on the side of the second fiber composite shell material 220 away from the first coating 130 to form a second coating 310 (the second coating 310 is a colored coating), which can play a shielding and priming role.

[0302] The side where the first coating 130 is formed is the front side of the shell, which is visible to the user, and the side where the second coating 310 is formed is the back side of the shell, which is not visible to the user.

[0303] Step 305 : Cut the second fiber composite material shell material 220 and the first coating 130 to form a second shell 320 .

[0304] The specific content of step 305 can be referred to step 104, and will not be repeated here.

[0305] In the embodiment of the present application, by adding a first fiber prepreg 210, that is, in a multi-layer laminate structure, through the composite structure of the effect layer (multiple coating layers or hot stamping layers) and the rubbing texture layer, a spatial effect of the fiber composite material back cover is achieved, which improves the appearance of the fiber composite material when used as a back cover, creating a differentiated effect. In addition, when the first coating 130 and the second fiber composite material shell material 220 are both colorless and transparent, ink can be sprayed on the side of the second fiber composite material shell material 220 away from the first coating 130 to form a second coating 310, which can serve as a shielding and primer.

[0306] FIG8 is a schematic diagram of an electronic device provided in an embodiment of the present application.

[0307] As shown in Figure 8, the electronic device 400 provided in the present application may include a shell 410, which may be the first shell 230 in Figure 6 or the second shell 320 in Figure 7. That is, the first shell 230 or the second shell 320 includes the composite material structure provided in the embodiment of the present application, or the first shell 230 or the second shell 320 can be made of the composite material structure provided in the embodiment of the present application. The composite material structure can be specifically as shown in Figures 2 to 5, and the composite material structure includes the first fiber prepreg 210 shown in Figures 2 to 5.

[0308] In some embodiments, the electronic device 400 further includes a transparent cover 420 disposed on the housing 410. The housing 410 and the transparent cover 420 cooperate to form a housing space within which components such as the display module, touch module, chip, battery, and circuit board of the electronic device 400 are located. The surface of the transparent cover 420 away from the housing 410 serves as the touch display surface of the electronic device 400.

[0309] It should be noted that the electronic device 400 can be an electronic device with a shell. The electronic device 400 involved in the embodiments of the present application can include mobile terminals such as mobile phones, wearable devices, smart watches, tablet computers, e-readers, notebook computers, laptop computers, mobile computers, augmented reality devices, virtual reality devices and handheld game consoles, etc.

[0310] 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 this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A composite material structure, characterized in that comprising at least one layer of a first fiber prepreg, wherein the first fiber prepreg comprises a fiber sheet and a resin wrapping the fiber sheet; The fiber sheet includes a fiber cloth and a plurality of coating layers located on the surface of the fiber cloth, and the difference in refractive index between two adjacent layers of the plurality of coating layers is greater than or equal to 0.

4.

2. The composite material structure according to claim 1, characterized in that The multiple coating layers include multiple first coating layers and multiple second coating layers that are alternately stacked, and the total thickness of the first coating layers and the second coating layers is between 600-2000 nm.

3. The composite material structure according to claim 2, characterized in that: The first coating layer is any one of silicon dioxide, zirconium dioxide or single crystal silicon, and the second coating layer is any one of niobium pentoxide, titanium dioxide or silicon nitride.

4. The composite material structure according to any one of claims 1 to 3, characterized in that The resin wrapping the fiber sheet is a modified resin containing fluorine, and the refractive index of the modified resin containing fluorine is between 1.3 and 1.

4.

5. The composite material structure according to any one of claims 1 to 4, characterized in that The composite material structure further includes at least one layer of second fiber prepreg stacked with the first fiber prepreg, wherein the second fiber prepreg includes a fiber woven fabric and a resin wrapping the fiber woven fabric.

6. The composite material structure according to claim 5, characterized in that The second fiber prepreg located on the upper layer of the first fiber prepreg is colorless and transparent.

7. The composite material structure according to any one of claims 1 to 6, characterized in that The thickness of one layer of the first fiber prepreg is between 0.07 mm and 0.15 mm.

8. The composite material structure according to any one of claims 1 to 7, characterized in that The material of the fiber cloth includes any one of the following: glass fiber, basalt fiber, carbon fiber, aramid fiber, ceramic fiber, polyethylene terephthalate fiber, ultra-high molecular weight polyethylene fiber, poly(p-phenylene benzobisoxazole) fiber, polyimide fiber, polypropylene fiber, hemp fiber, and bamboo fiber.

9. A composite material structure, characterized in that comprising at least one layer of a first fiber prepreg, wherein the first fiber prepreg comprises a fiber sheet and a resin wrapping the fiber sheet; The fiber sheet includes a fiber cloth and a plurality of coating layers located on the surface of the fiber cloth. The plurality of coating layers include a metal coating layer and a third coating layer located on both sides of the metal coating layer.

10. The composite material structure according to claim 9, characterized in that The metal coating is any one of gold, silver, aluminum, indium, nickel, titanium or chromium, and the third coating is any one of silicon dioxide, zirconium dioxide or single crystal silicon.

11. The composite material structure according to claim 9 or 10, characterized in that: The resin wrapping the fiber sheet is a modified resin containing fluorine, and the refractive index of the modified resin containing fluorine is between 1.3 and 1.

4.

12. The composite material structure according to any one of claims 9 to 11, characterized in that The total thickness of the multiple coating layers is between 50-400 nm, and the thickness of the metal coating layer is between 2-20 nm.

13. The composite material structure according to any one of claims 9 to 12, characterized in that The composite material structure further includes at least one layer of second fiber prepreg stacked with the first fiber prepreg, wherein the second fiber prepreg includes a fiber woven fabric and a resin wrapping the fiber woven fabric.

14. The composite material structure according to claim 13, characterized in that The second fiber prepreg located on the upper layer of the first fiber prepreg is colorless and transparent.

15. The composite material structure according to any one of claims 9 to 14, characterized in that The thickness of one layer of the first fiber prepreg is between 0.07 mm and 0.15 mm.

16. The composite material structure according to any one of claims 9 to 15, characterized in that The material of the fiber cloth includes any one of the following: glass fiber, basalt fiber, carbon fiber, aramid fiber, ceramic fiber, polyethylene terephthalate fiber, ultra-high molecular weight polyethylene fiber, poly(p-phenylene benzobisoxazole) fiber, polyimide fiber, polypropylene fiber, hemp fiber, and bamboo fiber.

17. A composite material structure, characterized in that comprising at least one layer of a first fiber prepreg, wherein the first fiber prepreg comprises a fiber sheet and a resin wrapping the fiber sheet; The fiber sheet comprises a fiber cloth and a hot stamping layer located on the surface of the fiber cloth, wherein the hot stamping layer is formed on the surface of the fiber cloth by a hot stamping process.

18. The composite material structure according to claim 17, characterized in that The hot stamping layer is formed by transferring printing on one side of the fiber cloth through a hot stamping process, or the hot stamping layer is formed by transferring printing on both sides of the fiber cloth through a hot stamping process.

19. The composite material structure according to claim 17 or 18, characterized in that The thickness of the hot stamping layer is between 0.01-0.02 mm.

20. The composite material structure according to any one of claims 17 to 19, characterized in that The hot stamping layer includes any one of the following: gold, silver, aluminum, indium, nickel, titanium, chromium; The material of the fiber cloth includes any one of the following: glass fiber, basalt fiber, carbon fiber, aramid fiber, ceramic fiber, polyethylene terephthalate fiber, ultra-high molecular weight polyethylene fiber, poly(p-phenylene benzobisoxazole) fiber, polyimide fiber, polypropylene fiber, hemp fiber, and bamboo fiber.

21. The composite material structure according to any one of claims 17 to 20, characterized in that The resin wrapping the fiber sheet is a modified resin containing fluorine, and the refractive index of the modified resin containing fluorine is between 1.3 and 1.

4.

22. The composite material structure according to any one of claims 17 to 21, characterized in that The composite material structure further includes at least one layer of second fiber prepreg stacked with the first fiber prepreg, wherein the second fiber prepreg includes a fiber woven fabric and a resin wrapping the fiber woven fabric.

23. The composite material structure according to claim 22, characterized in that The second fiber prepreg located on the upper layer of the first fiber prepreg is colorless and transparent.

24. The composite material structure according to any one of claims 17 to 23, characterized in that The thickness of one layer of the first fiber prepreg is between 0.07 mm and 0.15 mm.

25. A housing, characterized in that: The shell is made of the composite material structure according to any one of claims 1 to 8, or made of the composite material structure according to any one of claims 9 to 16, or made of the composite material structure according to any one of claims 17 to 24.

26. An electronic device, characterized in that: Comprising a housing as claimed in claim 25.

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