Composite material structure, shell and electronic equipment

Abstract

The invention provides a composite material structure, a shell and electronic equipment, the composite material structure can be applied to the shell or the electronic equipment, the composite material structure comprises at least one layer of first fiber prepreg, and the first fiber prepreg comprises a fiber sheet and resin wrapping the fiber sheet; the fiber sheet comprises fiber cloth and a plurality of coating layers located on the surface of the fiber cloth, and the difference value of the refractive indexes of every two adjacent coating layers is larger than or equal to 0.4. In the composite material structure provided by the invention, the brightness difference is formed through the refractive index difference between the adjacent plating layers, so that the appearance attractiveness of the fiber composite material is improved when the fiber composite material is applied to the shell and the electronic equipment.

Description

[0001] This application is a divisional application. The original application, application number 202410316359.3, was filed on March 19, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of electronic devices, and more specifically, to a composite material structure, housing, and electronic device. Background Technology

[0003] Fiber composite materials possess characteristics such as high strength and low density. When used as casing materials for electronic devices, they offer advantages such as light weight and resistance to breakage from drops, making them a key casing material for future electronic devices. However, due to the molding process and properties of fiber composite materials, fiber textures are easily visible in the casing material, resulting in a generally lower quality and less aesthetically pleasing appearance. This is particularly true when used as back cover materials for high-end products such as flagship smartphones and tablets, significantly impacting the overall aesthetics and perceived value of the product.

[0004] Currently, the main surface treatment processes for shell materials are spraying and printing, or coating and transfer printing or printing. However, these traditional processes achieve a flat effect, which makes it difficult to achieve differentiation and cannot bring consumers a richer appearance effect or improve the aesthetics of the product. Summary of the Invention

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

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

[0007] The first fiber prepreg can be understood as a fiber composite material prepregped with resin, and the first fiber prepreg can be a fiber prepreg sheet with a brightening effect.

[0008] For example, the fiber cloth can be woven fabric, mesh fabric, felt fabric, 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), poly(p-phenylene benzodioxazole) fiber (PBO fiber), polyimide fiber (PI fiber), polypropylene fiber, hemp fiber, and bamboo fiber. Furthermore, the fiber cloth can be colored or colorless. Glass fiber is preferred, 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), and the effect layers can be obtained by coating. That is, some colored coating layers or brightening and reflective effect layers can be coated on the fiber cloth, so that the final composite material structure can show bright lines or have a colored shimmering effect.

[0010] In the embodiments of this application, by limiting the refractive index difference between two adjacent layers of 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, the 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 the housing and electronic devices, it can enrich the appearance effect of the housing and electronic devices and improve the aesthetics of the housing and electronic devices.

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

[0012] In conjunction with the first aspect, in some implementations of the first aspect, the plurality of coating layers includes a plurality of first coating layers and a plurality of second coating layers alternately stacked, wherein the total thickness of the first coating layer and the second coating layer is between 600-2000 nm, that is, the total thickness of the plurality of coating layers is between 600-2000 nm. For example, the first coating layer can be in contact with the fiber cloth, that is, the first coating layer is first deposited on the fiber cloth, then the second coating layer is deposited, then the first coating layer is deposited, then the second coating layer is deposited, and so on, in a sequentially stacked manner.

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

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

[0015] For example, the resin encapsulating 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] For example, the plurality of coating layers may include two or more sets of repeated SiO2 / Nb2O5 stacks, or two or more sets of repeated SiO2 / TiO2 stacks. That is, the plurality of coating layers may include at least four stacks, which may be stacks of SiO2 / Nb2O5 / SiO2 / Nb2O5 or stacks of SiO2 / TiO2 / SiO2 / TiO2, and the refractive index difference between adjacent layers is greater than or equal to 0.4.

[0017] For example, in order to achieve a better visual effect for 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 adjacent layers is greater than or equal to 0.4.

[0018] For example, in the embodiments of this application, the deposit can be deposited on the surface of the fiber cloth (one or both sides) by vacuum physical deposition. For example, it can be deposited on the surface of glass fiber by vacuum physical deposition. The deposit can be SiO2 / Nb2O5 or SiO2 / TiO2 repeated in two or more layers.

[0019] In conjunction with the first aspect, in some implementations of the first aspect, the thickness of a first fiber prepreg layer is between 0.07 and 0.15 mm. In some embodiments, the thickness of a first fiber prepreg layer may 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, thereby ensuring that when the composite material structure is applied to a shell, the shell thickness is within a certain range, preventing the shell from becoming too thick.

[0020] In conjunction with the first aspect, in some implementations of the first aspect, the resin encapsulating the fiber sheet is a fluorine-modified resin, wherein the refractive index of the fluorine-modified resin is between 1.3 and 1.4.

[0021] It should be understood that the resin impregnated in the first fiber prepreg can be a fluorinated resin with a refractive index between 1.3 and 1.4, which is lower than the refractive index of conventional resins (the refractive index of conventional resins is approximately 1.5-1.6). When the human eye observes a composite material structure, it first sees the air, then the resin, and finally the effect layers (multiple coating layers). If the refractive index of the resin is relatively high, the effect of the effect layers will be significantly reduced. If the refractive index of the resin is low, the bright lines or sequins of the effect layers will be more transparent visually, resulting in a better overall effect.

[0022] Furthermore, without using fluorinated resins, maintaining good visual effects requires a thicker coating layer (e.g., 2000 nm). A thicker coating layer may pose reliability risks and increase costs. Using fluorinated resins allows for a reduction in coating thickness, down to 1200 nm or even 1000 nm, further resolving the issue of excessively thick effect layer coatings. This reduces reliability and mass production risks, and lowers costs.

[0023] In conjunction with the first aspect, in some 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, the second fiber prepreg comprising a woven fiber fabric and a resin encapsulating the woven fiber fabric.

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

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

[0026] For example, the composite material structure includes 2 to 8 layers, preferably 2 to 5 layers. The first fiber prepreg can be in any layer, preferably in any of the 1st to 3rd layers, and the remaining layers can be the second fiber prepreg.

[0027] For example, the color of the second fiber prepreg can be colored, colorless and translucent, or colorless and transparent, preferably colorless and transparent.

[0028] It should be understood that, in order to prevent obscuring the first fiber prepreg, the second fiber prepreg on top of the first fiber prepreg can be colorless and transparent. The second fiber prepreg below the first fiber prepreg can be either colored or colorless and transparent; there is no limitation on this.

[0029] For example, the resin used to wrap the 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 woven fiber fabric may 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. Glass fiber is preferred, followed by UHMWPE fiber.

[0031] For example, the thickness of a second fiber prepreg layer is between 0.07 and 0.15 mm. In some embodiments, the thickness of a second fiber prepreg layer may be between 0.08 and 0.11 mm. By limiting the thickness of the second fiber prepreg, the resulting composite material structure is kept within a certain range, thereby ensuring that the shell thickness is within a certain range when the composite material structure is applied to a shell, thus avoiding an excessively thick shell.

[0032] In conjunction with the first aspect, in some implementations of the first aspect, in order to present a better visual effect, the fibers (i.e., filaments) constituting the fiber cloth should not be too thick, and the maximum cross-sectional width of the fibers (i.e., filaments) constituting the fiber cloth is between 1 and 30 μm. Optionally, in order to present an even better visual effect, the maximum cross-sectional width of the fibers constituting the fiber cloth can be between 3 and 10 μm.

[0033] For example, the cross-section of the fibers (i.e. filaments) that make up the fiber cloth can be solid or hollow. When the cross-section is hollow, it can form a ring-shaped bright line.

[0034] For example, the cross-sectional shape of the fibers (i.e. filaments) constituting the fiber cloth can be one of a circle, a square, or a polygon.

[0035] In conjunction with the first aspect, in some implementations of the first aspect, the composite material structure further includes a first coating layer located on the side of the plurality of coated layers away from the fiber cloth. Exemplarily, the first coating layer includes a first textured layer, a first adhesive layer, a second textured layer, and a second adhesive layer stacked sequentially. The first textured layer is an outer textured layer, a surface layer accessible to the human hand, which enhances tactile feedback. The second textured layer is an inner textured layer, inaccessible to the human hand. The first adhesive layer and the second adhesive layer are transitional adhesive layers, with the first adhesive layer connecting the first and second textured layers, and the second adhesive layer connecting to the first fiber prepreg. The resulting composite material structure, from bottom to top, may sequentially include: fiber cloth, multiple coated layers, a second adhesive layer, a second textured layer, a first adhesive layer, and a first textured layer, with the fiber cloth being the innermost layer inaccessible to the human hand and the first textured layer being the outermost layer accessible to the human hand.

[0036] For example, a coating can be deposited on the second textured layer, and the deposited SiO2 / Nb2O5 or SiO2 / TiO2 is repeated in two or more stacks, with the total thickness of the coating layer on the second textured layer being between 50-400 nm.

[0037] It should be understood that the second textured layer, in combination with the first fiber prepreg provided in this application, or in combination with the multiple coating layers provided in this application, can visually present an effect with a sense of spatial hierarchy. The superimposed spatial effect will make the resulting composite material structure or shell more aesthetically pleasing.

[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 located on the side of the fiber fabric away from the plurality of coated layers, and the second coating is a colored coating. It should be understood that the second coating mainly serves to shield electronic devices and can also act as a base coat; for example, the base color (second coating) can be a uniform red, white, black, etc.

[0039] In a second aspect, a composite material structure is provided, the composite material structure comprising at least one first fiber prepreg, the first fiber prepreg comprising a fiber sheet and a resin encapsulating the fiber sheet; the fiber sheet comprising a fiber cloth and a plurality of coating layers located on the surface of the fiber cloth, the plurality of coating layers comprising a metal coating and a third coating disposed on both sides of the metal coating.

[0040] The first fiber prepreg can be understood as a fiber composite material prepregped with resin, and the first fiber prepreg can be a fiber prepreg sheet with a brightening effect.

[0041] For example, the fiber cloth can be woven fabric, mesh fabric, felt fabric, etc. The material of the fiber cloth 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. Furthermore, 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), and the effect layers can be obtained by coating. That is, some colored coating layers or brightening and reflective effect layers can be coated on the fiber cloth, so that the final composite material structure can show bright lines or have a colored shimmering effect.

[0043] In this embodiment, the multiple coating layers in the composite material structure may include metal coatings. That is, metal coatings can be deposited on the surface of the fiber cloth. Since metal coatings have high reflectivity, bright lines or shiny effects can be formed through the reflection of the metal components. When composite material structures are applied to housings and electronic devices, they can enrich the appearance of the housings and electronic devices and improve their aesthetic appeal.

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

[0045] In conjunction with the second aspect, in some 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 monocrystalline silicon.

[0046] It should be understood that the metal coating can be made of highly reflective metallic materials, such as gold, silver, aluminum, indium, nickel, titanium, or chromium. Additionally, the third coating is located on both sides of the metal coating. This third coating is made of a relatively stable material, such as silicon dioxide, zirconium dioxide, or monocrystalline silicon. The third coating protects the metal coating, preventing corrosion and oxidation.

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

[0048] For example, in the embodiments of this application, the deposit can be deposited on the surface of the fiber cloth (one or both sides) by vacuum physical deposition. For example, it can be deposited on the surface of glass fiber by vacuum physical deposition, and the deposit can be a SiO2 / In / SiO2 stack.

[0049] In conjunction with the second aspect, in some implementations of the second aspect, the total thickness of the plurality of 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 multiple coating layers and the metal coating to an appropriate range, the effect of bright lines or glitter in the effect layer can be improved. Furthermore, the coating layer has higher reliability, and the production cost is correspondingly reduced.

[0051] For example, the resin encapsulating 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 some implementations of the second aspect, the thickness of a first fiber prepreg layer is between 0.07 and 0.15 mm. In some embodiments, the thickness of a first fiber prepreg layer may be between 0.08 and 0.11 mm. By limiting the thickness of the first fiber prepreg, the resulting composite material structure is kept within a certain range, thereby ensuring that when the composite material structure is applied to a shell, the shell thickness is kept within a certain range, preventing the shell from becoming too thick.

[0053] In conjunction with the second aspect, in some implementations of the second aspect, the resin encapsulating the fiber sheet is a fluorine-modified resin, and the refractive index of the fluorine-modified resin is between 1.3 and 1.4.

[0054] It should be understood that the resin impregnated in the first fiber prepreg can be a fluorinated resin with a refractive index between 1.3 and 1.4, which is lower than the refractive index of conventional resins (the refractive index of conventional resins is approximately 1.5-1.6). When the human eye observes a composite material structure, it first sees the air, then 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 greatly reduced. If the refractive index of the resin is low, the bright lines or sequins in the effect layer will be more transparent visually, resulting in a better overall effect.

[0055] Furthermore, without using fluorinated resins, maintaining good visual effects requires a thicker coating layer (e.g., 2000 nm). A thicker coating layer may pose reliability risks and increase costs. Using fluorinated resins allows for a reduction in coating thickness, down to 1200 nm or even 1000 nm, further resolving the issue of excessively thick effect layer coatings and thus reducing reliability and mass production risks.

[0056] In conjunction with the second aspect, in some 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, the second fiber prepreg comprising a woven fiber fabric and a resin encapsulating the woven fiber fabric.

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

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

[0059] For example, the composite material structure includes 2 to 8 layers, preferably 2 to 5 layers. The first fiber prepreg can be in any layer, preferably in any of the 1st to 3rd layers, and the remaining layers can be the second fiber prepreg.

[0060] For example, the color of the second fiber prepreg can be colored, colorless and translucent, or colorless and transparent, preferably colorless and transparent.

[0061] It should be understood that, in order to prevent obscuring the first fiber prepreg, the second fiber prepreg on top of the first fiber prepreg should be colorless and transparent. The second fiber prepreg below the first fiber prepreg may be colored or colorless and transparent; there is no limitation on this.

[0062] For example, the resin used to wrap the 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 woven fiber fabric may 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. Glass fiber is preferred, followed by UHMWPE fiber.

[0064] For example, the thickness of a second fiber prepreg layer is between 0.07 and 0.15 mm. In some embodiments, the thickness of a second fiber prepreg layer may be between 0.08 and 0.11 mm. By limiting the thickness of the second fiber prepreg, the resulting composite material structure is kept within a certain range, thereby ensuring that the shell thickness is within a certain range when the composite material structure is applied to a shell, thus avoiding an excessively thick shell.

[0065] In conjunction with the second aspect, in some implementations of the second aspect, in order to present a better visual effect, the fibers (i.e., filaments) constituting the fiber cloth should not be too thick, and the maximum cross-sectional width of the fibers (i.e., filaments) constituting the fiber cloth is between 1 and 30 μm. Optionally, in order to present an even better visual effect, the maximum cross-sectional width of the fibers constituting the fiber cloth can be between 3 and 10 μm.

[0066] For example, the cross-section of the fibers (i.e. filaments) that make up the fiber cloth can be solid or hollow. When the cross-section is hollow, it can form a ring-shaped bright line.

[0067] For example, the cross-sectional shape of the fibers (i.e. filaments) constituting the fiber cloth can be one of a circle, a square, or a polygon.

[0068] In conjunction with the second aspect, in some implementations of the second aspect, the composite material structure further includes a first coating layer located on the side of the plurality of coated layers away from the fiber cloth. Exemplarily, the first coating layer includes a first textured layer, a first adhesive layer, a second textured layer, and a second adhesive layer stacked sequentially. The first textured layer is an outer textured layer, a surface layer accessible to the human hand, which enhances tactile feedback. The second textured layer is an inner textured layer, inaccessible to the human hand. The first adhesive layer and the second adhesive layer are transitional adhesive layers, with the first adhesive layer connecting the first and second textured layers, and the second adhesive layer connecting to the first fiber prepreg. The resulting composite material structure, from bottom to top, may sequentially include: fiber cloth, multiple coated layers, a second adhesive layer, a second textured layer, a first adhesive layer, and a first textured layer, with the fiber cloth being the innermost layer inaccessible to the human hand and the first textured layer being the outermost layer accessible to the human hand.

[0069] For example, a coating can be deposited on the second textured layer, and the deposited SiO2 / Nb2O5 or SiO2 / TiO2 is repeated in two or more stacks, with the total thickness of the coating layer on the second textured layer being between 50-400 nm.

[0070] It should be understood that the second textured layer, in combination with the first fiber prepreg provided in this application, or in combination with the multiple coating layers provided in this application, can visually present an effect with a sense of spatial hierarchy. The superimposed spatial effect will make the resulting composite material structure or shell more aesthetically pleasing.

[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 located on the side of the fiber fabric away from the plurality of coated layers, and the second coating is a colored coating. It should be understood that the second coating mainly serves to shield electronic devices and can also act as a base coat; for example, the base color (second coating) can be a uniform red, white, black, etc.

[0072] Thirdly, a composite material structure is provided, the composite material structure comprising at least one layer of first fiber prepreg, the first fiber prepreg comprising fiber sheets and resin encapsulating the fiber sheets; the fiber sheets comprising fiber cloth and a hot stamping layer located on the surface of the fiber cloth, the hot stamping layer being formed on the surface of the fiber cloth by a hot stamping process.

[0073] The first fiber prepreg can be understood as a fiber composite material prepregped with resin, and the first fiber prepreg can be a fiber prepreg sheet with a brightening effect.

[0074] Understandably, hot stamping is a process that uses the principle of hot pressing to transfer the aluminum layer from electroplated aluminum foil onto the surface of the substrate to create a special metallic effect.

[0075] For example, the hot stamping layer can be formed by transferring the hot stamping process onto one side of the fiber cloth, or the hot stamping layer can be formed by transferring the hot stamping process onto both sides of the fiber cloth. That is, a metallic foil material can be transferred onto a fiber cloth (such as fiberglass cloth) using a hot stamping process to form a glossy pattern; transfer can be done on one side or both sides. The metallic foil can be aluminum foil, gold foil, silver foil, indium foil, etc., with aluminum foil and indium foil being preferred.

[0076] In this embodiment, the composite material structure may include a hot stamping layer, which can be formed on the surface of the fiber cloth through a hot stamping process. By hot stamping metal onto the surface of the fiber cloth, the high reflectivity of the metal components creates bright lines or a 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 aesthetic appeal.

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

[0078] In conjunction with the third aspect, in some implementations of the third aspect, 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, PET fiber, UHMWPE fiber, PBO fiber, PI fiber, polypropylene fiber, hemp fiber, bamboo fiber.

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

[0080] In conjunction with the third aspect, in some 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 a suitable range, the effect of bright lines or glitter in the effect layer is improved. Furthermore, the reliability of the hot stamping layer is higher, and the production cost is correspondingly reduced.

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

[0082] In conjunction with the third aspect, in some implementations of the third aspect, the resin encapsulating the fiber sheet is a fluorine-modified resin, and the refractive index of the fluorine-modified resin is between 1.3 and 1.4.

[0083] It should be understood that the resin impregnated in the first fiber prepreg can be a fluorinated resin with a refractive index between 1.3 and 1.4, which is lower than the refractive index of conventional resins (the refractive index of conventional resins is approximately 1.5-1.6). When the human eye observes a composite material structure, it first sees the air, then 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 low, the bright lines or sequins in the effect layer will be more transparent visually, resulting in a better overall effect.

[0084] Furthermore, without using fluorinated resins, maintaining good visual effects requires a thicker coating layer (e.g., 2000 nm). A thicker coating layer may pose reliability risks and increase costs. Using fluorinated resins allows for a reduction in coating thickness, down to 1200 nm or even 1000 nm, further resolving the issue of excessively thick effect layer coatings and thus reducing reliability and mass production risks.

[0085] In conjunction with the third aspect, in some 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, the second fiber prepreg comprising a woven fiber fabric and a resin encapsulating the woven fiber fabric.

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

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

[0088] For example, the composite material structure includes 2 to 8 layers, preferably 2 to 5 layers. The first fiber prepreg can be in any layer, preferably in any of the 1st to 3rd layers, and the remaining layers can be the second fiber prepreg.

[0089] For example, the color of the second fiber prepreg can be colored, colorless and translucent, or colorless and transparent, preferably colorless and transparent.

[0090] It should be understood that, in order to prevent obscuring the first fiber prepreg, the second fiber prepreg on top of the first fiber prepreg should be colorless and transparent. The second fiber prepreg below the first fiber prepreg may be colored or colorless and transparent; there is no limitation on this.

[0091] For example, the resin used to wrap the 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 woven fiber fabric may 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. Glass fiber is preferred, followed by UHMWPE fiber.

[0093] For example, the thickness of a second fiber prepreg layer is between 0.07 and 0.15 mm. In some embodiments, the thickness of a second fiber prepreg layer may be between 0.08 and 0.11 mm. By limiting the thickness of the second fiber prepreg, the resulting composite material structure is kept within a certain range, thereby ensuring that the shell thickness is within a certain range when the composite material structure is applied to a shell, thus avoiding an excessively thick shell.

[0094] In conjunction with the third aspect, in some implementations of the third aspect, in order to present a better visual effect, the fibers (i.e., filaments) constituting the fiber cloth should not be too thick, and the maximum cross-sectional width of the fibers (i.e., filaments) constituting the fiber cloth is between 1 and 30 μm. Optionally, in order to present an even better visual effect, the maximum cross-sectional width of the fibers constituting the fiber cloth can be between 3 and 10 μm.

[0095] For example, the cross-section of the fibers (i.e. filaments) that make up the fiber cloth can be solid or hollow. When the cross-section is hollow, it can form a ring-shaped bright line.

[0096] For example, the cross-sectional shape of the fibers (i.e. filaments) constituting the fiber cloth can be one of a circle, a square, or a polygon.

[0097] In conjunction with the third aspect, in some implementations of the third aspect, the composite material structure further includes a first coating located on the side of the hot stamping layer away from the fiber cloth. Exemplarily, the first coating includes a first textured layer, a first adhesive layer, a second textured layer, and a second adhesive layer stacked sequentially. The first textured layer is an outer textured layer, a surface layer accessible to the hand, which enhances tactile feedback. The second textured layer is an inner textured layer, inaccessible to the hand. The first adhesive layer and the second adhesive layer are transitional adhesive layers, with the first adhesive layer connecting the first and second textured layers, and the second adhesive layer connecting to the first fiber prepreg. The resulting composite material structure, from bottom to top, may sequentially include: fiber cloth, hot stamping layer, second adhesive layer, second textured layer, first adhesive layer, and first textured layer, with the fiber cloth being the innermost layer inaccessible to the hand and the first textured layer being the outermost layer accessible to the hand.

[0098] For example, a coating can be deposited on the second textured layer, and the deposited SiO2 / Nb2O5 or SiO2 / TiO2 is repeated in two or more stacks, with the total thickness of the coating layer on the second textured layer being between 50-400 nm.

[0099] It should be understood that the second textured layer, in combination with the first fiber prepreg provided in this application, or in combination with the multiple coating layers provided in this application, can visually present an effect with a sense of spatial hierarchy. The superimposed spatial effect will make the resulting composite material structure or shell more aesthetically pleasing.

[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 located on the side of the fiber fabric away from the first coating, and the second coating is a colored coating. It should be understood that the second coating mainly serves to shield electronic devices and can also act as a base coat; for example, the base color (second coating) can be a uniform red, white, black, etc.

[0101] Fourthly, a method for manufacturing a composite material structure is provided, the method comprising: obtaining a fiber cloth; applying a coating process to the surface of the fiber cloth to form a plurality of coating layers, wherein the difference in refractive index between two adjacent 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 fiber sheets and resin encapsulating the fiber sheets.

[0103] For example, the material of the fiber cloth may 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 may be colored or colorless. Preferably, the material of the fiber cloth is glass fiber, followed by UHMWPE fiber.

[0104] For example, the resin 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. In some embodiments, for better visual effects, the resin may be a fluorine-modified resin with a refractive index between 1.3 and 1.4.

[0105] In this embodiment, when fabricating the composite material structure, multiple coating layers can be deposited on the surface of the fiber cloth, and the refractive index difference between adjacent coating layers is limited to 0.4 or higher. That is, by sequentially and repeatedly stacking low-refractive-index and high-refractive-index materials, a difference in brightness is created through the difference in refractive index, forming 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 aesthetic appeal.

[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 some implementations of the fourth aspect, depositing multiple coating layers on the surface of the fiber cloth using a coating process includes: depositing a first film layer on the surface of the fiber cloth, depositing a second film layer on the surface of the first film layer away from the fiber cloth, depositing a third film layer on the surface of the second film layer away from the fiber cloth, and depositing a fourth film layer on the surface of the third film layer away from the fiber cloth. In some embodiments, a fifth film layer may also be deposited on the surface of the fourth film layer away from the fiber cloth.

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

[0109] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the manufacturing method further includes: providing a second fiber prepreg on one and / or both sides of the first fiber prepreg. The second fiber prepreg is manufactured by existing methods and comprises a woven fiber fabric and a resin encapsulating the woven fiber fabric.

[0110] It should be understood that, in order to prevent obscuring the first fiber prepreg, the second fiber prepreg on top of the first fiber prepreg should be colorless and transparent. The second fiber prepreg below the first fiber prepreg may be colored or colorless and transparent; there is no limitation on this.

[0111] For example, the thickness of both the second fiber prepreg layer and the first fiber prepreg layer is between 0.07 and 0.15 mm. In some embodiments, the thickness of both the second fiber prepreg layer and the first fiber prepreg layer is between 0.08 and 0.11 mm. By limiting the thickness of the second fiber prepreg and the first fiber prepreg, the final composite material structure is within a certain range, thereby ensuring that the shell thickness is within a certain range when the composite material structure is applied to a shell, preventing the shell from becoming too thick.

[0112] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the manufacturing method further includes: spraying a first coating layer onto the side of the plurality of coated layers away from the fiber cloth.

[0113] For example, the first coating includes a first textured layer, a first adhesive layer, a second textured layer, and a second adhesive layer stacked sequentially. The first textured layer is an outer textured layer, which is the surface layer that can be touched by hand and can increase tactile feedback. The second textured layer is an inner textured layer that cannot be directly touched by hand. The first adhesive layer and the second adhesive layer are transitional adhesive layers. The first adhesive layer connects the first textured layer and the second textured layer, and the second adhesive layer can be connected to the first fiber prepreg. The resulting composite material structure, from bottom to top, can sequentially include: fiber cloth, multiple coating layers, the second adhesive layer, the second textured layer, the first adhesive layer, and the first textured layer. The fiber cloth is the innermost layer and cannot be directly touched by hand, while the first textured layer is the outermost layer and can be directly touched by hand.

[0114] For example, a coating can be deposited on the second textured layer, and the deposited SiO2 / Nb2O5 or SiO2 / TiO2 is repeated in two or more stacks, with the total thickness of the coating layer on the second textured layer being between 50-400 nm.

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

[0116] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the manufacturing method further includes: spraying a second coating onto the side of the fiber cloth away from the plurality of coating layers.

[0117] It should be understood that, when the first fiber prepreg and / or the second fiber prepreg are colorless and transparent, a second coating may also be applied. This second coating is located on the side of the fiber cloth away from the plurality of coating layers, and this second coating is a colored coating. It should be understood that this second coating mainly serves to shield electronic devices and can also act as a base coat; for example, the base color (second coating) can be a uniform red, white, black, etc.

[0118] Fifthly, a method for manufacturing a composite material structure is provided, the method comprising: obtaining a fiber cloth; depositing a sixth film layer on the surface of the fiber cloth using a coating process; depositing a metal coating layer on the side of the sixth film layer away from the fiber cloth using a coating process; depositing 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 coatings (sixth film layer, metal coating layer and seventh film layer) in a resin to form a first fiber prepreg.

[0119] The sixth and seventh film layers are both the third coating layer described above. For example, 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 fiber sheets and resin encapsulating the fiber sheets.

[0121] For example, the material of the fiber cloth may 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 may be colored or colorless. Preferably, the material of the fiber cloth is glass fiber, followed by UHMWPE fiber.

[0122] For example, the resin 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. In some embodiments, for better visual effects, the resin may be a fluorine-modified resin with a refractive index between 1.3 and 1.4.

[0123] In this embodiment, when fabricating the composite material structure, multiple coating layers (a sixth coating layer, a metal coating layer, and a seventh coating layer) can be deposited on the surface of the fiber cloth. The high reflectivity of the metal coating layer within these multiple coating layers can create bright lines or a shimmering 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 aesthetic appeal.

[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 some implementations of the fifth aspect, the manufacturing method further includes: providing a second fiber prepreg on one and / or both sides of the first fiber prepreg. The second fiber prepreg is manufactured by existing methods and comprises a woven fiber fabric and a resin encapsulating the woven fiber fabric.

[0126] It should be understood that, in order to prevent obscuring the first fiber prepreg, the second fiber prepreg on top of the first fiber prepreg should be colorless and transparent. The second fiber prepreg below the first fiber prepreg may be colored or colorless and transparent; there is no limitation on this.

[0127] For example, the thickness of both the second fiber prepreg layer and the first fiber prepreg layer is between 0.07 and 0.15 mm. In some embodiments, the thickness of both the second fiber prepreg layer and the first fiber prepreg layer is between 0.08 and 0.11 mm. By limiting the thickness of the second fiber prepreg and the first fiber prepreg, the final composite material structure is within a certain range, thereby ensuring that the shell thickness is within a certain range when the composite material structure is applied to a shell, preventing the shell from becoming too thick.

[0128] In conjunction with the fifth aspect, in some implementations of the fifth aspect, the manufacturing method further includes: spraying a first coating onto the side of the seventh membrane layer away from the fiber cloth.

[0129] For example, the first coating includes a first textured layer, a first adhesive layer, a second textured layer, and a second adhesive layer stacked sequentially. The first textured layer is an outer textured layer, which is the surface layer that can be touched by hand and can increase tactile feedback. The second textured layer is an inner textured layer that cannot be directly touched by hand. The first adhesive layer and the second adhesive layer are transitional adhesive layers. The first adhesive layer connects the first textured layer and the second textured layer, and the second adhesive layer can be connected to the first fiber prepreg. The resulting composite material structure, from bottom to top, can sequentially include: fiber cloth, multiple coating layers, the second adhesive layer, the second textured layer, the first adhesive layer, and the first textured layer. The fiber cloth is the innermost layer and cannot be directly touched by hand, while the first textured layer is the outermost layer and can be directly touched by hand.

[0130] For example, a coating can be deposited on the second textured layer, and the deposited SiO2 / Nb2O5 or SiO2 / TiO2 is repeated in two or more stacks, with the total thickness of the coating layer on the second textured layer being between 50-400 nm.

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

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

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

[0134] In a sixth aspect, a method for manufacturing a composite material structure is provided, the method comprising: obtaining a fiber cloth; transferring metal foil material onto the fiber cloth by a hot stamping process to form a hot stamping layer (with 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 can be any one of gold, silver, aluminum, indium, nickel, titanium, or chromium. For example, the metal foil can be aluminum foil, gold foil, silver foil, indium foil, etc., with aluminum foil and indium foil being preferred.

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

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

[0138] For example, the material of the fiber cloth may 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 may be colored or colorless. Preferably, the material of the fiber cloth is glass fiber, followed by UHMWPE fiber.

[0139] For example, the resin 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. In some embodiments, for better visual effects, the resin may be a fluorine-modified resin with a refractive index between 1.3 and 1.4.

[0140] In this embodiment, when fabricating the composite material structure, a hot stamping metal layer can be formed on the surface of the fiber cloth using a hot stamping process, and the high reflectivity of the metal can create bright lines or a 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 aesthetic appeal.

[0141] In conjunction with the sixth aspect, in some 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 some implementations of the sixth aspect, the manufacturing method further includes: providing a second fiber prepreg on one and / or both sides of the first fiber prepreg. The second fiber prepreg is manufactured by existing methods and comprises a woven fiber fabric and a resin encapsulating the woven fiber fabric.

[0143] It should be understood that, in order to prevent obscuring the first fiber prepreg, the second fiber prepreg on top of the first fiber prepreg should be colorless and transparent. The second fiber prepreg below the first fiber prepreg may be colored or colorless and transparent; there is no limitation on this.

[0144] For example, the thickness of both the second fiber prepreg layer and the first fiber prepreg layer is between 0.07 and 0.15 mm. In some embodiments, the thickness of both the second fiber prepreg layer and the first fiber prepreg layer is between 0.08 and 0.11 mm. By limiting the thickness of the second fiber prepreg and the first fiber prepreg, the final composite material structure is within a certain range, thereby ensuring that the shell thickness is within a certain range when the composite material structure is applied to a shell, preventing the shell from becoming too thick.

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

[0146] For example, the first coating includes a first textured layer, a first adhesive layer, a second textured layer, and a second adhesive layer stacked sequentially. The first textured layer is an outer textured layer, which is the surface layer that can be touched by hand and can increase tactile feedback. The second textured layer is an inner textured layer that cannot be directly touched by hand. The first adhesive layer and the second adhesive layer are transitional adhesive layers. The first adhesive layer connects the first textured layer and the second textured layer, and the second adhesive layer can be connected to the first fiber prepreg. The resulting composite material structure, from bottom to top, can sequentially include: fiber cloth, multiple coating layers, the second adhesive layer, the second textured layer, the first adhesive layer, and the first textured layer. The fiber cloth is the innermost layer and cannot be directly touched by hand, while the first textured layer is the outermost layer and can be directly touched by hand.

[0147] For example, a coating can be deposited on the second textured layer, and the deposited SiO2 / Nb2O5 or SiO2 / TiO2 is repeated in two or more stacks, with the total thickness of the coating layer on the second textured layer being between 50-400 nm.

[0148] It should be understood that the combination of the second texture layer and the hot stamping layer can visually present a sense of spatial layering. The superimposed spatial effect will make the resulting composite material structure or shell more aesthetically pleasing.

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

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

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

[0152] Eighthly, an electronic device is provided, the electronic device including a housing made of a composite material structure of the first aspect and any implementation thereof, or the housing made of a composite material structure of the second aspect and any implementation thereof, or the housing made of a composite material structure of the third aspect and any implementation thereof.

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

[0154] For example, the electronic device can be an electronic device with a casing, such as mobile terminals like mobile phones, wearable devices, smartwatches, tablets, e-readers, laptops, laptop computers, mobile computers, augmented reality devices, virtual reality devices, and handheld game consoles, etc., and this application does not limit it. Attached Figure Description

[0155] Figure 1 This application illustrates a schematic flowchart of a shell surface treatment process.

[0156] Figure 2 This is a cross-sectional schematic diagram of a composite material structure provided in an embodiment of this application.

[0157] Figure 3 This is a cross-sectional schematic diagram of another composite material structure provided in the embodiments of this application.

[0158] Figure 4 This is a cross-sectional schematic diagram of another composite material structure provided in the embodiments of this application.

[0159] Figure 5 This is a schematic diagram of the first fiber prepreg provided in the embodiments of this application.

[0160] Figure 6 This is a schematic flowchart of a shell appearance processing technology provided in an embodiment of this application.

[0161] Figure 7 This is a schematic flowchart of another shell appearance processing technology provided in the embodiments of this application.

[0162] Figure 8 This is a schematic diagram of an electronic device provided in an embodiment of this application. Detailed Implementation

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

[0164] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more features. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more, and "at least one" and "one or more" refer to one, two, or more. The singular expressions "a," "an," "the," "the," "this," and "this" are intended to also include expressions such as "one or more," unless the context explicitly indicates otherwise. The sequence numbers of the processes below do not imply an order of execution; the execution order 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 this application. For example, in the embodiments of this application, the words "110," "120," and "130," etc., are merely identifiers for descriptive convenience and do not limit the order of execution steps. The term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0165] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of 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 "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0166] In the description of the embodiments of this application, the terms "upper" and "lower" indicate the orientation or positional relationship relative to the orientation or position of the components shown in the drawings. It should be understood that these directional terms are relative concepts and are used for relative description and clarification, 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 can change accordingly depending on the orientation of the components in the drawings, and therefore should not be construed as limiting this application.

[0167] To highlight the high-end quality of electronic devices, manufacturers are increasingly focusing on the aesthetic appearance of the device's casing. For example, colors can be applied to the casing, allowing the device to display a variety of body colors. Textures can also be added to the casing, giving the device a matte or frosted visual effect.

[0168] Fiber composite materials possess characteristics such as high strength and low density. When used as casing materials for electronic devices, they offer advantages such as light weight and resistance to breakage from drops, making them a key casing material for future electronic devices. However, due to the molding process and properties of fiber composite materials, fiber textures are easily visible in the casing material, resulting in a generally lower quality and less aesthetically pleasing appearance. This is particularly true when used as back cover materials for high-end products such as flagship smartphones and tablets, significantly impacting the overall aesthetics and perceived value of the product.

[0169] Currently, the main surface treatment processes for shell materials include spraying with printing, coating with transfer printing, or coating with printing with printing. However, these traditional processes achieve a flat effect, making it difficult to differentiate the product and failing to provide consumers with richer visual effects or enhance the product's aesthetic appeal.

[0170] For example, such as Figure 1 As shown, Figure 1 A schematic flowchart of a shell surface treatment process is shown.

[0171] Step 101: Obtain multiple fiber prepregs, and the multiple fiber prepregs can be stacked.

[0172] Among them, the fiber prepreg can also be called the second fiber prepreg 110. The second fiber prepreg 110 can be understood as a fiber composite material prepregned with resin. The fiber composite material here can be a woven fiber fabric.

[0173] For example, the second fiber prepreg 110 can be a woven fabric impregnated with a resin to be cured. That is, the second fiber prepreg 110 can include a woven fabric and a resin coating the woven fabric. The resin coating the woven fabric can 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; this application does not limit the specific resin used.

[0174] For example, the color of the second fiber prepreg 110 can be colored, colorless semi-transparent, or colorless transparent, with colorless transparent being preferred.

[0175] For example, a fiber woven fabric is a cloth made by interlacing fibers using textile machinery. This fabric can use a variety of different fibers; for example, the fiber material (i.e., the material of the fiber woven fabric) included in the second fiber prepreg 110 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, or bamboo fiber. Preferably, the material of the fiber woven fabric is glass fiber, followed by UHMWPE fiber.

[0176] Step 102: Multiple layers of second fiber prepreg 110 are molded to form first fiber composite shell material 120.

[0177] Compression molding is a manufacturing process commonly used to process parts or articles made of plastics, metals, and other materials. This process involves heating the material to a softened state, placing it in a mold, and applying high pressure to shape it into the desired form inside the mold. Once cooled and solidified, the material retains the shaped form.

[0178] In this step, multiple stacked layers of second fiber prepreg 110 can be heated to a softened state and then placed in a mold to form the desired shape inside the mold, such as forming a shape like... Figure 1 The mobile phone casing shown is formed and then cooled and solidified to form the first fiber composite material casing material 120 (such as mobile phone casing material).

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

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

[0181] It should be noted that in step 103, the first coating 130 can be formed by spraying and printing, or by dip coating and transfer printing, or dip coating and printing.

[0182] Spray coating combined with transfer printing can transfer patterns or images to a target surface. In this process, spray coating technology is first used to evenly apply paint to the printing medium in the form of a spray. Then, using transfer printing technology, the printing medium is brought into contact with the target surface and pressure is applied, causing the paint to transfer from the medium to the target surface, forming the desired pattern or image. Diffuser coating combined with transfer printing is used to transfer patterns or images from the printing medium to the target surface. In this process, the image is first printed on special transfer paper, and then the transfer paper is brought into contact with the target surface (such as ceramics, glass, etc.). By applying pressure and heat, the pattern is transferred from the transfer paper to the target surface. Diffuser coating combined with transfer printing is a printing process that combines dip coating and transfer printing techniques. In this process, dip coating technology is first used to evenly coat the printing medium with paint. Then, the printing medium is brought into contact with the target surface and pressure is applied, causing the paint to transfer from the medium to the target surface. During this process, a transfer printing process may be used to ensure accurate pattern transfer.

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

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

[0185] As can be seen from the above processing steps, since the basic material (second fiber prepreg 110) that makes up the shell has a single color brightness, and the layers composed of the second fiber prepreg are integrated and have a uniform color (such as pure black, pure white, etc.), the final shell formed is an integrated effect, which cannot achieve a richer effect, makes it difficult to achieve differentiation, and cannot bring consumers a richer appearance effect and improve the aesthetics of the product.

[0186] Therefore, this application provides a composite material structure, housing, and electronic device. The composite material structure can achieve bright lines or a dazzling effect. When the composite material structure is applied to the housing and electronic device, it can enrich the appearance of the housing and electronic device and improve their aesthetic appeal.

[0187] Figures 2 to 5 These are cross-sectional schematic diagrams of three composite material structures provided in the embodiments of this application.

[0188] The composite material structure provided in this application may include at least one layer of first fiber prepreg 210. The first fiber prepreg 210 may include fiber sheet 212 and resin 211 encapsulating the fiber sheet. The first fiber prepreg 210 can be understood as a fiber material prepregped with resin. The fiber material here may be the fiber sheet 212 of this application. The first fiber prepreg 210 may 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 by a coating process or by a hot stamping process.

[0190] In some embodiments, such as Figure 2 As shown, the fiber sheet 212 includes a fiber cloth 2120 and multiple coating layers on the surface of the fiber cloth 2120, wherein the difference in refractive index between adjacent layers is greater than or equal to 0.4. The fiber cloth 2120 can be a woven fabric, a mesh fabric, a felt fabric, etc. The fiber cloth 2120 can be colored or colorless.

[0191] For example, 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 called effect layers (effect layers with a brightening effect), and the effect layers can be obtained by coating. That is, some colored coating layers or brightening and reflective effect layers can be coated on the fiber cloth 2120, so that the final composite material structure can show bright lines or have a colored shimmering effect.

[0192] In this embodiment, by limiting the refractive index difference between adjacent layers of multiple coating layers in the composite material structure to 0.4 or higher, that is, by repeatedly stacking low-refractive-index materials and high-refractive-index materials in sequence, the 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 housings and electronic devices, it can enrich the appearance of housings and electronic devices and improve their aesthetics.

[0193] For example, such as Figure 2 As shown, the multiple coating layers may include multiple first coating layers and multiple second coating layers alternately stacked, with the total thickness of the first and second coating layers between 600-2000 nm. For example, the first coating layer may be in contact with the fiber cloth 2120; that is, the first film layer 2121 is deposited on the fiber cloth first, then the second film layer 2122, then the third film layer 2123, and then the fourth film layer 2124, and so on, stacked sequentially. Wherein, the first film layer 2121 and the third film layer 2123 are the first coating layers, and the second film layer 2122 and the fourth film layer 2124 are the second coating layers.

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

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

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

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

[0198] For example, in the embodiments of this application, the deposit can be deposited on the surface of the fiber cloth (one or both sides) by vacuum physical deposition. For example, it can be deposited on the surface of glass fiber by vacuum physical deposition. The deposit can be SiO2 / Nb2O5 or SiO2 / TiO2 repeated in two or more layers.

[0199] In some embodiments, such as Figure 3 As shown, the fiber sheet 212 includes a fiber cloth 2120 and multiple coating layers on the surface of the fiber cloth 2120. These coating layers include a metal coating 2125 and a third coating layer (which includes a sixth film layer 2126 and a seventh film layer 2127) disposed on both sides of the metal coating layer. The fiber cloth 2120 can be a woven fabric, a mesh fabric, felt, etc. The fiber cloth 2120 can be colored or colorless.

[0200] In this embodiment, the multiple coating layers in the composite material structure may include metal coatings. That is, metal coatings can be deposited on the surface of the fiber cloth. Since metal coatings have high reflectivity, bright lines or shiny effects can be formed through the reflection of the metal components. When composite material structures are applied to housings and electronic devices, they can enrich the appearance of the housings and electronic devices and improve their aesthetic appeal.

[0201] For example, the metal plating layer 2125 can be any one of gold, silver, aluminum, indium, nickel, titanium or chromium, and the third plating layer can be any one of silicon dioxide, zirconium dioxide or monocrystalline silicon.

[0202] It should be understood that the metal plating 2125 can be made of a highly reflective metal material, such as gold, silver, aluminum, indium, nickel, titanium, or chromium. Additionally, a third plating layer is located on both sides of the metal plating 2125. This third plating layer is made of a material with good stability, such as silicon dioxide, zirconium dioxide, or monocrystalline silicon. This third plating layer protects the metal plating 2125, preventing corrosion and oxidation.

[0203] For example, such as Figure 3 As shown, the plurality of coating layers may include three stacked layers, namely a sixth film layer 2126, a metal coating layer 2125, and a seventh film layer 2127, wherein the sixth film layer 2126 is 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, namely a silicon dioxide layer, an indium layer, and a silicon dioxide layer, wherein the silicon dioxide layer is in contact with the fiber cloth 2120.

[0204] In this embodiment, the deposit can be deposited on the surface (one or both sides) of the fiber cloth 2120 by vacuum physical deposition. For example, it can be deposited on the surface of glass fiber by vacuum physical deposition, and the deposit can be a SiO2 / In / SiO2 stack.

[0205] For example, the total thickness of the multiple coating layers is between 50 and 400 nm, that is, the total thickness of the metal coating 2125, the sixth film layer 2126, and the seventh film layer 2127 is between 50 and 400 nm. Among them, the thickness of the metal coating 2125 is between 2 and 20 nm.

[0206] It should be understood that by limiting the thickness of multiple coating layers and the thickness of the metal plating 2125 within a suitable range, the effect layer can produce better bright lines or glitter effects. Furthermore, the coating layer has higher reliability, and the manufacturing cost is correspondingly reduced.

[0207] In some embodiments, such as Figure 4As shown, 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 by a hot stamping process.

[0208] It should be understood that hot stamping is a process that uses the principle of hot pressing to transfer the aluminum layer from electroplated aluminum foil to the surface of the substrate to create a special metallic effect.

[0209] In this embodiment, the composite material structure may include a hot stamping layer, which can be formed on the surface of the fiber cloth through a hot stamping process. By hot stamping metal onto the surface of the fiber cloth, the high reflectivity of the metal components creates bright lines or a 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 aesthetic appeal.

[0210] For example, the hot stamping layer 2128 can be formed by transferring it onto one side of the fiber cloth 2120 using a hot stamping process, or the hot stamping layer 2128 can be formed by transferring it onto both sides of the fiber cloth 2120 using a hot stamping process. That is, a metallic foil material can be transferred onto a fiber cloth (such as fiberglass cloth) using a hot stamping process to form a glossy pattern; it can be transferred on one side or both sides. The metallic foil can be aluminum foil, gold foil, silver foil, indium foil, etc., with aluminum foil and indium foil being preferred.

[0211] For example, the hot stamping layer 2128 may include any of the following: gold, silver, aluminum, indium, nickel, titanium, or chromium.

[0212] For example, 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 effect of bright lines or glitter on the effect layer is improved. In addition, the hot stamping layer 2128 has higher reliability and the production cost is correspondingly reduced.

[0213] In some examples, the resin 211 encapsulating 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 that encapsulates the fiber sheet can be a fluorine-modified resin with a refractive index between 1.3 and 1.4.

[0215] It should be understood that the resin 211 impregnated in the first fiber prepreg 210 can be a fluorinated resin with a refractive index between 1.3 and 1.4, which is lower than the refractive index of conventional resins (the refractive index of conventional resins is approximately 1.5-1.6). When the human eye observes a composite material structure, it first sees the air, then 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 greatly reduced. If the refractive index of the resin is low, the bright lines or sequins of the effect layer will be more transparent in terms of visual effect, and the overall effect will be better.

[0216] Furthermore, without using fluorinated resins, maintaining good visual effects requires a thicker coating layer (e.g., 2000 nm). A thicker coating layer may pose reliability risks and increase costs. Using fluorinated resins allows for a reduction in coating thickness, down to 1200 nm or even 1000 nm, further resolving the issue of excessively thick effect layer coatings. This reduces reliability and mass production risks, and lowers costs.

[0217] In some examples, the material of the fiber cloth 2120 may 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. Preferably, the material of the fiber cloth 2120 is glass fiber, and secondarily, UHMWPE fiber.

[0218] It should be noted that, as mentioned above Figure 2 The bright lines or sequins in the three structures shown can be ordered or disordered, and this application does not limit this. For example, they can be made into regular bright lines or sequins according to actual needs, or they can be made into disordered bright lines or sequins.

[0219] For example, such as Figure 5 As shown, Figure 5 A top view schematic diagram of the first fiber prepreg 210 is shown. 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, such as Figure 5 As shown in (a), the fiber sheet 212 can be unidirectionally arranged and can form a disordered glossy effect.

[0221] In one example, such as Figure 5 As shown in (b), the fiber sheets 212 can be arranged in bundles and can form an orderly bright effect.

[0222] In one example, such as Figure 5As shown in (c), the fiber sheet 212 can be arranged in multiple directions and can form a bright line composition.

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

[0224] The second fiber prepreg 110 can be understood as a fiber composite material prepregned with resin. The fiber composite material can be a woven fiber fabric, so the second fiber prepreg can also be called a fiber prepreg.

[0225] It should be noted that the second fiber prepreg 110 is a 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 material in the resin to be cured is different. The material impregnated in the second fiber prepreg 110 is a woven fabric, while 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 the multiple coating layers or hot stamping layers can achieve a brightening effect.

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

[0227] It should be understood that, in order to prevent obscuring the first fiber prepreg 210, the second fiber prepreg 110 above the first fiber prepreg 210 should be colorless and transparent. The second fiber prepreg 110 below the first fiber prepreg 210 may be colored or colorless and transparent, and there is no limitation on this.

[0228] It should be noted that the relevant description of the second fiber prepreg 110 can be found in [reference needed]. Figure 1 The relevant description in the document.

[0229] In some examples, the thickness of the monolayer second fiber prepreg 110 and / or the monolayer first fiber prepreg 210 is between 0.07 and 0.15 mm. In some embodiments, the thickness of the monolayer second fiber prepreg 110 and / or the monolayer first fiber prepreg 210 may be between 0.08 and 0.11 mm. By limiting the thickness of the monolayer second fiber prepreg 110 and / or the first fiber prepreg 210, the resulting composite material structure is within a certain range, thereby ensuring that the shell thickness is within a certain range when the composite material structure is applied to a shell, avoiding an excessively thick shell.

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

[0231] For example, the cross-section of the fibers (i.e. filaments) that make up the fiber cloth can be solid or hollow. When the cross-section is hollow, it can form a ring-shaped bright line.

[0232] For example, the cross-sectional shape of the fibers (i.e. filaments) constituting the fiber cloth can be one of a circle, a square, or a polygon.

[0233] In some examples, the composite material structure may further include a first coating located on the side of the plurality of coated layers away from the fiber cloth 2120. Exemplarily, the first coating includes a first textured layer, a first adhesive layer, a second textured layer, and a second adhesive layer stacked sequentially. The first textured layer is an outer textured layer, a surface layer accessible to the hand, which enhances tactile feedback. The second textured layer is an inner textured layer, inaccessible to the hand. The first adhesive layer and the second adhesive layer are transitional adhesive layers, with the first adhesive layer connecting the first and second textured layers, and the second adhesive layer connecting to the first fiber prepreg 210, thereby forming the composite material structure. Exemplarily, the formed composite material structure may sequentially include, from bottom to top: fiber cloth 2120, multiple coated layers, a second adhesive layer, a second textured layer, a first adhesive layer, and a first textured layer, with the fiber cloth 2120 being the innermost layer inaccessible to the hand and the first textured layer being the outermost layer accessible to the hand.

[0234] For example, a coating can be deposited on the second textured layer, and the deposited SiO2 / Nb2O5 or SiO2 / TiO2 is repeated in two or more stacks, with the total thickness of the coating layer on the second textured layer being between 50-400 nm.

[0235] It should be understood that the second textured layer, in combination with the first fiber prepreg 210 provided in this application, or in combination with the multiple coating layers or hot stamping layers provided in this application, can visually present an effect with a sense of spatial hierarchy. The superimposed spatial effect will make the resulting composite material structure or shell more aesthetically pleasing.

[0236] In some examples, where the first fiber prepreg 210 and / or the second fiber prepreg 110 are colorless and transparent, the composite structure may also include a second coating located on the side of the fiber fabric 2120 away from the plurality of coating layers, and this second coating is a colored coating. It should be understood that this second coating primarily serves to shield electronic components and can also act as a base coat; for example, the base color (second coating) can be a uniform red, white, black, etc.

[0237] The above combination Figures 2 to 5 This application introduces three composite material structures provided in its embodiments. Furthermore, this application also provides corresponding methods for manufacturing these composite material structures.

[0238] In one implementation, this application provides a method 1 for manufacturing a composite material structure: obtaining a fiber cloth 2120; applying a coating process to the surface of the fiber cloth 2120 to form multiple coating layers, wherein the difference in refractive index between two adjacent coating layers is greater than or equal to 0.4; and pre-impregnating the fiber cloth with the multiple coating layers in 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, depositing multiple coating layers on the surface of the fiber cloth using a coating process may specifically include: depositing a first film layer 2121 on the surface of the fiber cloth 2120; depositing a second film layer 2122 on the surface of the first film layer 2121 away from the fiber cloth 2120; depositing a third film layer 2123 on the surface of the second film layer 2122 away from the fiber cloth 2120; and depositing 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 the bright lines, a fifth film layer can also be deposited on the surface of the fourth film layer 2124 away from the fiber cloth 2120. It should be understood that the plurality of film layers may include the first film layer 2121, the second film layer 2122, the third film layer 2123, the fourth film layer 2124, and the fifth film layer.

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

[0243] In some embodiments, the manufacturing method 1 may further include: providing a second fiber prepreg 110 on one and / or both sides of the first fiber prepreg 210. A detailed description of the second fiber prepreg 110 can be found in [reference needed]. Figure 1 The relevant description in the document.

[0244] It should be understood that, in order to prevent obscuring the first fiber prepreg 210, the second fiber prepreg 110 above the first fiber prepreg 210 can be colorless and transparent. The second fiber prepreg 110 below the first fiber prepreg 210 can be either colored or colorless and transparent, and there is no limitation on this.

[0245] In some embodiments, the manufacturing method 1 may further include: spraying a first coating onto the 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 may refer to Figure 1 , Figure 6 as well as Figure 7 The first coating 130.

[0247] It should be understood that the first coating may include a first textured layer, a first adhesive layer, a second textured layer, and a second adhesive layer stacked sequentially. The first textured layer is an outer textured layer, which is the surface layer that can be touched by the hand and can increase tactile feedback. The second textured layer is an inner textured layer that cannot be directly touched by the hand. The first adhesive layer and the second adhesive layer are transitional adhesive layers. The first adhesive layer connects the first textured layer and the second textured layer, and the second adhesive layer can be connected to the first fiber prepreg 210. The resulting composite material structure, from bottom to top, may sequentially include: fiber cloth 2120, multiple coating layers, the second adhesive layer, the second textured layer, the first adhesive layer, and the first textured layer. The fiber cloth 2120 is the innermost layer and cannot be directly touched by the hand, while the first textured layer is the outermost layer and can be directly touched by the hand.

[0248] It should be understood that the second texture layer, combined with multiple coating layers, can visually present a sense of spatial hierarchy. The superimposed spatial effect makes the resulting composite material structure or shell more aesthetically pleasing.

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

[0250] For example, the second coating may refer to the following Figure 7 The second coating 310 in the middle.

[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 may also be applied. This second coating is located on the side of the fiber cloth 2120 away from the multiple coating layers (or the first film layer 2121), and this second coating is a colored coating. It should be understood that this second coating mainly serves to shield electronic devices and can also act as a base coat; for example, the base color (second coating) can be a uniform red, white, black, etc.

[0252] It should be noted that the composite material structure fabrication method 1 described above can produce the structure as shown above. Figure 2 The aforementioned composite material structure.

[0253] In another implementation, this application provides a method 2 for manufacturing a composite material structure: obtaining a fiber cloth 2120; depositing a sixth film layer 2126 on the surface of the fiber cloth 2120 using a coating process; depositing a metal coating layer 2125 on the side of the sixth film layer 2126 away from the fiber cloth 2120 using a coating process; depositing a seventh film layer 2127 on the side of the metal coating layer 2125 away from the fiber cloth 2120 using a coating process; pre-impregnating the fiber cloth 2120 with multiple coatings (including the sixth film layer 2126, the metal coating layer 2125, and the seventh film layer 2127) in 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 described above. 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: providing a second fiber prepreg 110 on one and / or both sides of the first fiber prepreg 210. The second fiber prepreg 110 is manufactured using conventional methods, and a detailed description of the second fiber prepreg 110 can be found in [reference needed]. Figure 1 The relevant description in the document.

[0257] It should be understood that, in order to prevent obscuring the first fiber prepreg 210, the second fiber prepreg 110 above the first fiber prepreg 210 should be colorless and transparent. The second fiber prepreg 110 below the first fiber prepreg 210 may be colored or colorless and transparent, and there is no limitation on this.

[0258] In some embodiments, the manufacturing method 2 may further include: spraying a first coating onto the 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 may refer to the following Figure 1 , Figure 6 as well as Figure 7 The first coating 130.

[0260] It should be understood that the first coating may include a first textured layer, a first adhesive layer, a second textured layer, and a second adhesive layer stacked sequentially. The first textured layer is an outer textured layer, which is the surface layer that can be touched by the hand and can increase tactile feedback. The second textured layer is an inner textured layer that cannot be directly touched by the hand. The first adhesive layer and the second adhesive layer are transitional adhesive layers. The first adhesive layer connects the first textured layer and the second textured layer, and the second adhesive layer can be connected to the first fiber prepreg. The resulting composite material structure, from bottom to top, may sequentially include: fiber cloth, multiple coating layers, a second adhesive layer, a second textured layer, a first adhesive layer, and a first textured layer. The fiber cloth is the innermost layer and cannot be directly touched by the hand, while the first textured layer is the outermost layer and can be directly touched by the hand.

[0261] It should be understood that the second texture layer, combined with multiple coating layers, can visually present a sense of spatial hierarchy. The superimposed spatial effect makes the resulting composite material structure or shell more aesthetically pleasing.

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

[0263] For example, the second coating may refer to the following Figure 7 The second coating 310 in the middle.

[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 may also be applied. This second coating is located on the side of the fiber cloth 2120 away from the multiple coating layers (or the sixth film layer 2126), and this second coating is a colored coating. It should be understood that this second coating mainly serves to shield electronic devices and can also act as a base coat; for example, the base color (second coating) can be a uniform red, white, black, etc.

[0265] It should be noted that the composite material structure fabrication method 2 described above can produce the structure as described above. Figure 3 The aforementioned composite material structure.

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

[0267] The hot stamping layer 2128 can be any one of gold, silver, aluminum, indium, nickel, titanium, or chromium. For example, the metal foil can 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 gloss effect, the thickness of the hot stamping layer can be limited to between 0.01 and 0.02 mm.

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

[0270] In some embodiments, the manufacturing method 3 may further include: providing a second fiber prepreg 110 on one and / or both sides of the first fiber prepreg 210. The second fiber prepreg 110 is manufactured using conventional methods, and a detailed description of the second fiber prepreg 110 can be found in [reference needed]. Figure 1 The relevant description in the document.

[0271] It should be understood that, in order to prevent obscuring the first fiber prepreg 210, the second fiber prepreg 110 above the first fiber prepreg 210 should be colorless and transparent. The second fiber prepreg 110 below the first fiber prepreg 210 may be colored or colorless and transparent, and there is no limitation on this.

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

[0273] For example, the first coating may refer to the following Figure 1 , Figure 6 as well as Figure 7 The first coating 130.

[0274] It should be understood that the first coating may include a first textured layer, a first adhesive layer, a second textured layer, and a second adhesive layer stacked sequentially. The first textured layer is an outer textured layer, which is the surface layer that can be touched by hand and can increase tactile feel. The second textured layer is an inner textured layer that cannot be directly touched by hand. The first adhesive layer and the second adhesive layer are transitional adhesive layers. The first adhesive layer connects the first textured layer and the second textured layer, and the second adhesive layer can be connected to the first fiber prepreg 210. The resulting composite material structure, from bottom to top, may sequentially include: fiber cloth 2120, hot stamping layer 2128, second adhesive layer, second textured layer, first adhesive layer, and first textured layer. The fiber cloth is the innermost layer and cannot be directly touched by hand, while the first textured layer is the outermost layer and can be directly touched by hand.

[0275] It should be understood that the second texture layer, combined with multiple coating layers, can visually present a sense of spatial hierarchy. The superimposed spatial effect makes the resulting composite material structure or shell more aesthetically pleasing.

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

[0277] For example, the second coating may refer to the following Figure 7 The second coating 310 in the middle.

[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 may also be applied. This second coating is located on the side of the fiber cloth 2120 away from the first coating, and this second coating is a colored coating. It should be understood that this second coating mainly serves to shield electronic devices and can also act as a base coat. For example, the base color (second coating) can be a uniform red, white, black, etc.

[0279] It should be noted that the composite material structure fabrication method 3 described above can produce the structure as described above. Figure 4 The aforementioned composite material structure.

[0280] Based on the above, this application also provides a housing, which may include, for example... Figures 2 to 4 The composite material structure shown, i.e., the shell, can be made of, for example... Figures 2 to 4 The composite material structure shown is manufactured using methods 1 to 3 described above. Figure 6 and Figure 7 The present application provides an exemplary method for processing the housing.

[0281] Figure 6 This is a schematic flowchart of a shell appearance processing technology provided in an embodiment of this application.

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

[0283] The number of the first fiber prepreg 210 and the second fiber prepreg 110 can be one or more. In this embodiment, the number of the second fiber prepreg 110 is 3 and the number of the first fiber prepreg 210 is 2.

[0284] It should be noted that the relevant description of the second fiber prepreg 110 can be found in [reference needed]. Figure 1 The relevant descriptions in the document, including the description of the first fiber prepreg 210, can be found in [the relevant section]. Figures 2 to 5 The relevant description in the document.

[0285] Step 202: The first fiber prepreg 210 and the second fiber prepreg 110, which are stacked together, are molded to form the second fiber composite 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 laminate layers 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 obscuring the lower first fiber prepreg 210, thus preventing the observation of the shell's gloss and spatial layering effect. The second fiber prepreg 110 below the first fiber prepreg 210 can be colored or colorless and transparent; this application does not limit this choice.

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

[0289] Other details in this step can be found in step 102, and will not be repeated here.

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

[0291] For example, the first coating 130 includes at least four layers, wherein a first texture (i.e., an outer texture) is imprinted on the first layer to enhance the tactile feel when touched by hand; a second texture (i.e., an inner texture) is imprinted on the third layer, and the inner texture, combined with the fiber sheet 212, can produce an additive effect, creating a sense of spatial layering; a film is deposited on the second texture; the first and third layers are colorless and transparent, while the second and fourth layers are colored and translucent or colorless and transparent. The deposited material can be two or more stacks of SiO2 / Nb2O5 or SiO2 / TiO2, and the total thickness of the deposit is between 50 and 400 nm.

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

[0293] The details of steps 203 and 204 can be found in steps 103 and 104 respectively, and will not be repeated here.

[0294] In this embodiment of the application, by adding the first fiber prepreg 210, that is, in the multi-layer laminated structure, through the composite structure of the effect fiber layer and the imprinted texture layer, the spatial effect of the fiber composite material back cover is realized, which improves the appearance of the fiber composite material when used in the back cover and forms a differentiated effect.

[0295] Figure 7 This is a schematic flowchart of another shell appearance processing technology provided in the embodiments of this application.

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

[0297] Step 302: The first fiber prepreg 210 and the second fiber prepreg 110 are stacked and molded to form the second fiber composite shell material 220.

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

[0299] The specific details of steps 301 to 303 can be found in steps 201 to 203 respectively, and will not be repeated here.

[0300] Step 304: Spray ink on the other side of the second fiber composite shell material 220 to form a second coating 310.

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

[0302] The side forming the first coating 130 is the front of the housing, which is visible to the user, while the side forming the second coating 310 is the back of the housing, which is invisible to the user.

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

[0304] The details of step 305 can be found in step 104, and will not be repeated here.

[0305] In this embodiment, by adding a first fiber prepreg 210, i.e., in a multi-layer laminated structure, a spatial effect is achieved through a composite structure of effect layers (multiple coating layers or hot stamping layers) and imprinted texture layers, improving the aesthetic appearance of the fiber composite material in back cover applications and creating a differentiated effect. Furthermore, when both the first coating 130 and the second fiber composite shell material 220 are colorless and transparent, ink can be sprayed onto the side of the second fiber composite shell material 220 away from the first coating 130 to form a second coating 310, thereby serving a masking and priming function.

[0306] Figure 8 This is a schematic diagram of an electronic device provided in an embodiment of this application.

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

[0308] In some embodiments, the electronic device 400 further includes a transparent cover plate 420 disposed on the housing 410. The housing 410 and the transparent cover plate 420 cooperate to form an accommodating space, in which components such as a display module, a touch module, a chip, a battery, and a circuit board of the electronic device 400 are disposed. The surface of the transparent cover plate 420 away from the housing 410 is 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 casing. The electronic device 400 involved in the embodiments of this application may include mobile terminals such as mobile phones, wearable devices, smartwatches, tablet computers, e-readers, laptops, 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 this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A composite material structure, characterized in that, It includes at least one layer of first fiber prepreg, the first fiber prepreg comprising fiber sheets and resin encapsulating the fiber sheets; The fiber sheet includes a fiber cloth and an effect layer located on the surface of the fiber cloth; The composite material structure further includes a first coating, which is located on the side of the effect layer away from the fiber cloth.

2. The composite material structure according to claim 1, characterized in that, The effect layer includes multiple coating layers, wherein the difference in refractive index between two adjacent coating layers is greater than or equal to 0.

4.

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

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

5. The composite material structure according to claim 1, characterized in that, The effect layer includes multiple coating layers, including a metal coating and a third coating disposed on both sides of the metal coating.

6. The composite material structure according to claim 5, 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 monocrystalline silicon.

7. The composite material structure according to claim 5 or 6, characterized in that, The total thickness of the plurality of coating layers is between 50-400 nm, and the thickness of the metal coating layer is between 2-20 nm.

8. The composite material structure according to claim 1, characterized in that, The effect layer includes a hot stamping layer, which is formed on the surface of the fiber cloth by a hot stamping process.

9. The composite material structure according to claim 8, characterized in that, The hot stamping layer is formed by hot stamping on one side of the fiber cloth, or by hot stamping on both sides of the fiber cloth.

10. The composite material structure according to claim 8 or 9, characterized in that, The thickness of the hot stamping layer is between 0.01 and 0.02 mm.

11. The composite material structure according to any one of claims 8 to 10, characterized in that, The hot stamping layer includes any one of the following: gold, silver, aluminum, indium, nickel, titanium, or chromium.

12. The composite material structure according to any one of claims 1 to 11, characterized in that, The resin encapsulating the fiber sheet is a fluorine-modified resin, and the refractive index of the fluorine-modified resin is between 1.3 and 1.

4.

13. The composite material structure according to any one of claims 1 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, the second fiber prepreg comprising a woven fiber fabric and a resin encapsulating the woven fiber fabric.

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

15. The composite material structure according to any one of claims 1 to 14, characterized in that, The thickness of the first fiber prepreg layer is between 0.07 and 0.15 mm.

16. The composite material structure according to any one of claims 1 to 15, characterized in that, The fiber cloth is made of any of the following materials: glass fiber, basalt fiber, carbon fiber, aramid fiber, ceramic fiber, polyethylene terephthalate fiber, ultra-high molecular weight polyethylene fiber, poly(p-phenylene benzodioxazole) fiber, polyimide fiber, polypropylene fiber, hemp fiber, and bamboo fiber.

17. A housing, characterized in that, The shell is made of a composite material structure as described in any one of claims 1 to 16.

18. An electronic device, characterized in that, Includes the housing as described in claim 17.

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