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

Technical Field

[0001] The present application relates to the field of electronic equipment, and more specifically, to a composite material structure, a housing and an electronic equipment. Background Art

[0002] Fiber composite materials have the characteristics of high strength and low density. When used as the shell material of electronic devices, they are light and not easy to break when dropped, so they are the key shell material of future electronic devices. Due to the molding process of fiber composite materials and the characteristics of composite materials, fiber grains are easily visible on the shell material, resulting in a general sense of quality and lack of beauty. Especially when used as the back cover material of high-end products such as flagship mobile phones and tablets, it greatly affects the overall aesthetics and value of the product.

[0003] At present, the main processes for the appearance processing of shell materials are spraying and rubbing, curtain coating and transfer or rubbing, but these traditional processes achieve a flat effect, which is difficult to achieve differentiation, and cannot bring consumers richer appearance effects and enhance the appearance of the product. Summary of the invention

[0004] The present application provides a composite material structure, a housing and an electronic device. The composite material structure can achieve bright lines or a glare effect. When the composite material structure is applied to the housing and the electronic device, it can enrich the appearance of the housing and the electronic device and improve the appearance of the housing and the electronic device.

[0005] In a first aspect, a composite material structure is provided, which includes at least one layer of a first fiber prepreg, wherein the first fiber prepreg includes a fiber sheet and a resin wrapping the fiber sheet; the fiber sheet includes a fiber cloth and a plurality of coating layers located on the surface of the fiber cloth, and the difference in refractive index between two adjacent layers of the plurality of coating layers is greater than or equal to 0.4.

[0006] The first fiber prepreg may be understood as a fiber composite material pre-impregnated with resin, and the first fiber prepreg may be a fiber prepreg sheet with a brightening effect.

[0007] Exemplarily, the fiber cloth can be a woven cloth, or a mesh cloth, a felt cloth, etc. The material of the fiber cloth can include any of the following: glass fiber, basalt fiber, carbon fiber, aramid fiber, ceramic fiber, polyethylene terephthalate fiber (PET fiber), ultra-high molecular weight polyethylene fiber (UHMWPE fiber), polyphenylene benzobisoxazole fiber (PBO fiber), polyimide fiber (PI fiber), polypropylene fiber, hemp fiber, bamboo fiber. And the fiber cloth can be colored or colorless. Among them, the material of the fiber cloth is preferably glass fiber, followed by UHMWPE fiber.

[0008] Exemplarily, the fiber sheet includes a fiber cloth and a plurality of coating layers on the surface of the fiber cloth, wherein the plurality of coating layers on the surface of the fiber cloth may also be referred to as effect layers (effect layers with a brightening effect), and the effect layers may be obtained by coating. That is, some colored coating layers or brightening and reflective effect layers may be plated on the fiber cloth, so that the composite material structure finally obtained can show bright lines or a colored glare.

[0009] In an embodiment of the present application, by limiting the refractive index difference between two adjacent layers of the multiple coating layers in the composite material structure to 0.4 or above, that is, by repeatedly stacking low-refractive index materials and high-refractive index materials in sequence, a difference in brightness is formed by the difference in refractive index, thereby forming an effect of bright lines or sequins. When the composite material structure is applied to a housing and an electronic device, the appearance of the housing and the electronic device can be enriched, and the appearance of the housing and the electronic device can be improved.

[0010] It should be noted that the bright lines or sequins formed in the embodiments of the present application may be ordered or disordered, and the present application does not limit this. Regular bright lines or sequins may be produced according to actual needs, or disordered bright lines or sequins may be produced.

[0011] In combination with the first aspect, in certain implementations of the first aspect, the plurality of coating layers include a plurality of first coating layers and a plurality of second coating layers that are alternately stacked, and the total thickness of the first coating layers and the second coating layers is between 600-2000 nm, that is, the total thickness of the plurality of coating layers is between 600-2000 nm. Exemplarily, the first coating layer may be in contact with the fiber cloth, that is, the first coating layer is firstly plated on the fiber cloth, and then the second coating layer is plated, and then the first coating layer is plated, and then the second coating layer is plated, and the two are stacked in sequence.

[0012] It should be understood that by limiting the thickness of the plurality of coating layers to a suitable range, the effect layer can present a better bright line or bright piece effect. In addition, the coating layer has a higher reliability and the manufacturing cost can be reduced accordingly.

[0013] Exemplarily, the first coating layer may be any one of silicon dioxide (SiO2), zirconium dioxide (ZrO2) or single crystal silicon, and the second coating layer may be any one of niobium pentoxide (Nb2O5), titanium dioxide (TiO2) or silicon nitride (Si3N4).

[0014] Exemplarily, the resin wrapping the fiber sheet may include at least one of the following: cellulose acetate, nylon, polyurethane, polycarbonate, polymethyl methacrylate, polyethylene terephthalate, epoxy resin, acrylic resin, phenolic resin, and silicone resin.

[0015] Exemplarily, the multiple coating layers may include two or more stacks of SiO2 / Nb2O5, or two or more stacks of SiO2 / TiO2. That is, the multiple 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 difference in refractive index between two adjacent layers is greater than or equal to 0.4.

[0016] Exemplarily, in order to achieve a better visual effect of bright lines or bright sheets, the multiple coating layers may include five stacks, which may be stacks of SiO2 / Nb2O5 / SiO2 / Nb2O5 / SiO2, or stacks of SiO2 / TiO2 / SiO2 / TiO2 / SiO2, and the refractive index difference between two adjacent layers is greater than or equal to 0.4.

[0017] Exemplarily, in an embodiment of the present application, the deposit can be deposited onto the surface (one side or both sides) of the fiber cloth by vacuum physical deposition. For example, it can be deposited onto the surface of the glass fiber by vacuum physical deposition. The deposit can be SiO2 / Nb2O5 or SiO2 / TiO2 repeated in 2 or more layers.

[0018] In conjunction with the first aspect, in certain implementations of the first aspect, the thickness of a layer of the first fiber prepreg is between 0.07-0.15 mm. In some embodiments, the thickness of a layer of the first fiber prepreg may be between 0.08-0.11 mm. By limiting the thickness of the first fiber prepreg, the resulting composite material structure is within a certain range, so that when the composite material structure is applied to a shell, the shell thickness is within a certain range to prevent the shell from being too thick.

[0019] In combination with the first aspect, in certain implementations of the first aspect, the resin wrapping the fiber sheet is a modified resin containing fluorine, and the refractive index of the modified resin containing fluorine is between 1.3 and 1.4.

[0020] It should be understood that the impregnated resin in the first fiber prepreg can be a fluorine-containing resin, and its refractive index is between 1.3-1.4, which is lower than the refractive index of conventional resins (the refractive index of conventional resins is about 1.5-1.6). When the human eye observes the composite material structure, the air is first seen, then the resin, and finally the effect layer (multiple coating layers). 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 visual effect, and the effect will be better.

[0021] In addition, if fluorine-containing resin is not used, the coating layer needs to be thicker (such as 2000nm) in order to maintain good visual effects. The thicker the coating layer, the greater the reliability risk and the higher the cost. If fluorine-containing resin is used, the thickness of the coating layer can be reduced to 1200nm or even 1000nm, which can further solve the problem of thick coating layer, thereby reducing the reliability and mass production risks and reducing costs.

[0022] In combination with the first aspect, in certain implementations of the first aspect, the composite material structure also includes at least one layer of second fiber prepreg stacked with the first fiber prepreg, and the second fiber prepreg includes a fiber woven fabric and a resin wrapping the fiber woven fabric.

[0023] The second fiber prepreg may be understood as a fiber composite material pre-impregnated with resin. The fiber composite material here may be a fiber woven fabric, so the second fiber prepreg may also be referred to as a fiber prepreg fabric.

[0024] It should be noted that the second fiber prepreg is a fiber woven fabric impregnated with the resin to be cured, and the first fiber prepreg is a fiber sheet impregnated with the resin to be cured. The main difference between the two is that the materials of the impregnation layer in the resin to be cured are different. The material impregnated in the second fiber prepreg is a fiber woven fabric, and the material impregnated in the first fiber prepreg is the fiber sheet provided in the present application. The fiber sheet includes multiple coating layers, and the multiple coating layers can achieve a brightening effect.

[0025] Exemplarily, the composite material structure includes 2 to 8 layers of laminates, preferably 2 to 5 layers. The first fiber prepreg can be placed in any layer, preferably in any layer from the 1st to the 3rd layer, and the remaining laminates can be the second fiber prepreg.

[0026] Exemplarily, the second fiber prepreg may be colored, or colorless and translucent, or colorless and transparent, preferably colorless and transparent.

[0027] It should be understood that in order to prevent the first fiber prepreg from being blocked, the second fiber prepreg on the first fiber prepreg may be colorless and transparent. The second fiber prepreg below the first fiber prepreg may be colored or colorless and transparent, and this is not limited.

[0028] Exemplarily, the resin wrapping the fiber woven fabric may include at least one of the following: cellulose acetate, nylon, polyurethane, polycarbonate, polymethyl methacrylate, polyethylene terephthalate, epoxy resin, acrylic resin, phenolic resin, and silicone resin.

[0029] Exemplarily, the material of the fiber woven fabric may include any one of the following: glass fiber, basalt fiber, carbon fiber, aramid fiber, ceramic fiber, PET fiber, UHMWPE fiber, PBO fiber, PI fiber, polypropylene fiber, hemp fiber, bamboo fiber. Among them, the material of the fiber woven fabric is preferably glass fiber, followed by UHMWPE fiber.

[0030] Exemplarily, the thickness of a layer of the second fiber prepreg is between 0.07-0.15 mm. In some embodiments, the thickness of a layer of the second fiber prepreg may be between 0.08-0.11 mm. By limiting the thickness of the second fiber prepreg, the resulting composite material structure is within a certain range, so that when the composite material structure is applied to the shell, the shell thickness is within a certain range to avoid the shell being too thick.

[0031] In conjunction with the first aspect, in certain implementations of the first aspect, in order to present a better visual effect, the fibers (i.e., fiber filaments) constituting the fiber cloth should not be too thick, and the maximum cross-sectional width of the fibers (i.e., fiber filaments) constituting the fiber cloth is between 1-30 μm. Optionally, in order to present a higher visual effect, the maximum cross-sectional width of the fibers constituting the fiber cloth may be between 3-10 μm.

[0032] For example, the cross-section of the fibers (ie, fiber filaments) constituting the fiber cloth may be solid or hollow. When the cross-section is a hollow structure, a ring-shaped bright line may be formed.

[0033] For example, the cross-sectional shape of the fibers (ie, fiber filaments) constituting the fiber cloth may be circular, square, or polygonal.

[0034] In combination with the first aspect, in certain implementations of the first aspect, the composite material structure further includes a first coating layer, which is located on a side of the plurality of coating layers away from the fiber cloth. Exemplarily, the first coating layer includes a first texture layer, a first bonding layer, a second texture layer, and a second bonding layer, which are sequentially stacked. The first texture layer is an outer texture layer, which is a surface layer that can be touched by a human hand, and the outer texture layer can increase the touch. The second texture layer is an inner texture layer that cannot be directly touched by a human hand. The first bonding layer and the second bonding layer are transition bonding layers, the first bonding layer is connected between the first texture layer and the second texture layer, and the second bonding layer can be connected to the first fiber prepreg, so that the composite material structure formed can include, from the bottom layer to the top layer, in sequence: fiber cloth, multiple coating layers, the second bonding layer, the second texture layer, the first bonding layer, and the first texture layer, the fiber cloth is the innermost layer, which cannot be directly touched by a human hand, and the first texture layer is the outermost layer, which can be directly touched by a human hand.

[0035] Exemplarily, the second texture layer may be coated, and the deposited SiO2 / Nb2O5 or SiO2 / TiO2 of the coating is repeated in more than two groups, and the total thickness of the coating layer on the second texture layer is between 50-400 nm.

[0036] It should be understood that the second texture layer combined with the first fiber prepreg provided in the present application, or in other words, the second texture layer combined with the multiple coating layers provided in the present application can visually present an effect of spatial layering. The superimposed spatial effect will make the resulting composite material structure or shell more beautiful.

[0037] Exemplarily, 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, which is located on a side of the fiber cloth away from the plurality of coating layers, and is a colored coating. It should be understood that the second coating mainly serves to shield the electronic device and can also serve as a primer, for example, the base color (second coating) may be uniform red, white, black, etc.

[0038] In a second aspect, a composite material structure is provided, which includes at least one layer of a first fiber prepreg, wherein the first fiber prepreg includes a fiber sheet and a resin wrapping the fiber sheet; the fiber sheet includes a fiber cloth and a plurality of coating layers located on the surface of the fiber cloth, wherein the plurality of coating layers include a metal coating and a third coating arranged on both sides of the metal coating.

[0039] The first fiber prepreg may be understood as a fiber composite material pre-impregnated with resin, and the first fiber prepreg may be a fiber prepreg sheet with a brightening effect.

[0040] Exemplarily, the fiber cloth can be a woven cloth, or a mesh cloth, a felt cloth, etc. The material of the fiber cloth can include any of the following: glass fiber, basalt fiber, carbon fiber, aramid fiber, ceramic fiber, PET fiber, UHMWPE fiber, PBO fiber, PI fiber, polypropylene fiber, hemp fiber, bamboo fiber. And the fiber cloth can be colored or colorless. Among them, the material of the fiber cloth is preferably glass fiber, followed by UHMWPE fiber.

[0041] Exemplarily, the fiber sheet includes a fiber cloth and a plurality of coating layers on the surface of the fiber cloth, wherein the plurality of coating layers on the surface of the fiber cloth may also be referred to as effect layers (effect layers with a brightening effect), and the effect layers may be obtained by coating. That is, some colored coating layers or brightening and reflective effect layers may be plated on the fiber cloth, so that the composite material structure finally obtained can show bright lines or a colored glare.

[0042] In the embodiment of the present application, the multiple coating layers in the composite material structure may include a metal coating, that is, the metal coating may be plated on the surface of the fiber cloth. Since the reflectivity of the metal coating is relatively high, a bright line or shiny effect may be formed by the reflection of the metal component. When the composite material structure is applied to a housing and an electronic device, the appearance of the housing and the electronic device can be enriched and the appearance of the housing and the electronic device can be improved.

[0043] It should be noted that the bright lines or sequins formed in the embodiments of the present application may be ordered or disordered, and the present application does not limit this. Regular bright lines or sequins may be produced according to actual needs, or disordered bright lines or sequins may be produced.

[0044] In combination with the second aspect, in certain implementations of the second aspect, the metal coating is any one of gold, silver, aluminum, indium, nickel, titanium or chromium, and the third coating is any one of silicon dioxide, zirconium dioxide or single crystal silicon.

[0045] It should be understood that the metal coating can be made of metal materials with high reflectivity, such as gold, silver, aluminum, indium, nickel, titanium or chromium. In addition, the third coating is located on both sides of the metal coating, and the third coating is made of a material with relatively good stability, such as silicon dioxide, zirconium dioxide or single crystal silicon. The third coating can protect the metal coating and prevent the metal coating from corrosion and oxidation.

[0046] Exemplarily, 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, and the silicon dioxide layer is in contact with the fiber cloth.

[0047] Exemplarily, in an embodiment of the present application, the deposit can be deposited onto the surface (one side or both sides) of the fiber cloth by vacuum physical deposition. For example, the deposit can be deposited onto the surface of the glass fiber by vacuum physical deposition, and the deposit can be a SiO2 / In / SiO2 stack.

[0048] In combination with the second aspect, in certain implementations of the second aspect, the total thickness of the multiple coating layers is between 50-400 nm, and the thickness of the metal coating layer is between 2-20 nm.

[0049] It should be understood that by limiting the thickness of the plurality of coating layers and the metal coating layer to a suitable range, the effect layer can present a better bright line or bright piece effect. In addition, the coating layer has a higher reliability and the production cost is reduced accordingly.

[0050] Exemplarily, the resin wrapping the fiber sheet may include at least one of the following: cellulose acetate, nylon, polyurethane, polycarbonate, polymethyl methacrylate, polyethylene terephthalate, epoxy resin, acrylic resin, phenolic resin, and silicone resin.

[0051] In conjunction with the second aspect, in certain implementations of the second aspect, a layer of the first fiber prepreg has a thickness between 0.07 and 0.15 mm. In some embodiments, a layer of the first fiber prepreg has a thickness 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, so that when the composite material structure is applied to a shell, the shell thickness is within a certain range to prevent the shell from being too thick.

[0052] In combination with the second aspect, in certain implementations of the second aspect, the resin wrapping the fiber sheet is a modified resin containing fluorine, and the refractive index of the modified resin containing fluorine is between 1.3 and 1.4.

[0053] It should be understood that the impregnated resin in the first fiber prepreg can be a fluorine-containing resin, and its refractive index is between 1.3-1.4, which is lower than the refractive index of conventional resins (the refractive index of conventional resins is about 1.5-1.6). When the human eye observes the composite material structure, the air is first seen, 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 relatively low, the bright lines or sequins of the effect layer will be more visually transparent, and the effect will be better.

[0054] In addition, if fluorine-containing resin is not used, the coating layer needs to be thicker (such as 2000nm) in order to maintain good visual effects. The thicker the coating layer, the greater the reliability risk and the higher the cost. If fluorine-containing resin is used, the thickness of the coating layer can be reduced to 1200nm or even 1000nm, which can further solve the problem of thick coating layer, thereby reducing the reliability and mass production risks.

[0055] In combination with the second aspect, in certain implementations of the second aspect, the composite material structure also includes at least one layer of second fiber prepreg stacked with the first fiber prepreg, and the second fiber prepreg includes a fiber woven fabric and a resin wrapping the fiber woven fabric.

[0056] The second fiber prepreg may be understood as a fiber composite material pre-impregnated with resin. The fiber composite material here may be a fiber woven fabric, so the second fiber prepreg may also be referred to as a fiber prepreg fabric.

[0057] It should be noted that the second fiber prepreg is a fiber woven fabric impregnated with the resin to be cured, and the first fiber prepreg is a fiber sheet impregnated with the resin to be cured. The main difference between the two is that the materials of the impregnation layer in the resin to be cured are different. The material impregnated in the second fiber prepreg is a fiber woven fabric, and the material impregnated in the first fiber prepreg is the fiber sheet provided in the present application. The fiber sheet includes multiple coating layers, and the multiple coating layers can achieve a brightening effect.

[0058] Exemplarily, the composite material structure includes 2 to 8 layers of laminates, preferably 2 to 5 layers. The first fiber prepreg can be placed in any layer, preferably in any layer from the 1st to the 3rd layer, and the remaining laminates can be the second fiber prepreg.

[0059] Exemplarily, the second fiber prepreg may be colored, or colorless and translucent, or colorless and transparent, preferably colorless and transparent.

[0060] It should be understood that in order to prevent the first fiber prepreg from being blocked, the second fiber prepreg on the first fiber prepreg should be colorless and transparent. The second fiber prepreg below the first fiber prepreg can be colored or colorless and transparent, and there is no limitation on this.

[0061] Exemplarily, the resin wrapping the fiber woven fabric may include at least one of the following: cellulose acetate, nylon, polyurethane, polycarbonate, polymethyl methacrylate, polyethylene terephthalate, epoxy resin, acrylic resin, phenolic resin, and silicone resin.

[0062] Exemplarily, the material of the fiber woven fabric may include any one of the following: glass fiber, basalt fiber, carbon fiber, aramid fiber, ceramic fiber, PET fiber, UHMWPE fiber, PBO fiber, PI fiber, polypropylene fiber, hemp fiber, bamboo fiber. Among them, the material of the fiber woven fabric is preferably glass fiber, followed by UHMWPE fiber.

[0063] Exemplarily, the thickness of a layer of the second fiber prepreg is between 0.07-0.15 mm. In some embodiments, the thickness of a layer of the second fiber prepreg may be between 0.08-0.11 mm. By limiting the thickness of the second fiber prepreg, the resulting composite material structure is within a certain range, so that when the composite material structure is applied to the shell, the shell thickness is within a certain range to avoid the shell being too thick.

[0064] In conjunction with the second aspect, in certain implementations of the second aspect, in order to present a better visual effect, the fibers (i.e., fiber filaments) constituting the fiber cloth should not be too thick, and the maximum cross-sectional width of the fibers (i.e., fiber filaments) constituting the fiber cloth is between 1-30 μm. Optionally, in order to present a higher visual effect, the maximum cross-sectional width of the fibers constituting the fiber cloth may be between 3-10 μm.

[0065] For example, the cross-section of the fibers (ie, fiber filaments) constituting the fiber cloth may be solid or hollow. When the cross-section is a hollow structure, a ring-shaped bright line may be formed.

[0066] For example, the cross-sectional shape of the fibers (ie, fiber filaments) constituting the fiber cloth may be circular, square, or polygonal.

[0067] In combination with the second aspect, in certain implementations of the second aspect, the composite material structure further includes a first coating layer, which is located on a side of the plurality of coating layers away from the fiber cloth. Exemplarily, the first coating layer includes a first texture layer, a first bonding layer, a second texture layer, and a second bonding layer, which are stacked in sequence. The first texture layer is an outer texture layer, which is a surface layer that can be touched by a human hand, and the outer texture layer can increase the touch. The second texture layer is an inner texture layer that cannot be touched directly by a human hand. The first bonding layer and the second bonding layer are transition bonding layers, the first bonding layer is connected between the first texture layer and the second texture layer, and the second bonding layer can be connected to the first fiber prepreg, so that the composite material structure formed can include, from the bottom layer to the top layer, in sequence: fiber cloth, a plurality of coating layers, a second bonding layer, a second texture layer, a first bonding layer, and a first texture layer, the fiber cloth is the innermost layer, which cannot be touched directly by a human hand, and the first texture layer is the outermost layer, which can be touched directly by a human hand.

[0068] Exemplarily, the second texture layer may be coated, and the deposited SiO2 / Nb2O5 or SiO2 / TiO2 of the coating is repeated in more than two groups, and the total thickness of the coating layer on the second texture layer is between 50-400 nm.

[0069] It should be understood that the second texture layer combined with the first fiber prepreg provided in the present application, or in other words, the second texture layer combined with the multiple coating layers provided in the present application can visually present an effect of spatial layering. The superimposed spatial effect will make the resulting composite material structure or shell more beautiful.

[0070] Exemplarily, 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, which is located on a side of the fiber cloth away from the plurality of coating layers, and is a colored coating. It should be understood that the second coating mainly serves to shield the electronic device and can also serve as a primer, for example, the base color (second coating) may be uniform red, white, black, etc.

[0071] According to a third aspect, a composite material structure is provided, which comprises at least one layer of a first fiber prepreg, wherein the first fiber prepreg comprises a fiber sheet and a resin wrapping the fiber sheet; the fiber sheet comprises a fiber cloth and a hot stamping layer located on the surface of the fiber cloth, wherein the hot stamping layer is formed on the surface of the fiber cloth by a hot stamping process.

[0072] The first fiber prepreg may be understood as a fiber composite material pre-impregnated with resin, and the first fiber prepreg may be a fiber prepreg sheet with a brightening effect.

[0073] It can be understood that the hot stamping process uses the principle of heat pressure transfer to transfer the aluminum layer in the electroplated aluminum to the surface of the substrate to form a special metal effect.

[0074] Exemplarily, the hot stamping layer may be formed by transferring on one side of the fiber cloth through a hot stamping process, or the hot stamping layer may be formed by transferring on both sides of the fiber cloth through a hot stamping process. That is, the metal foil material may be transferred to the fiber cloth (such as glass fiber cloth) through a hot stamping process to form a bright pattern; the transfer may be on one side or on both sides. The metal foil may be aluminum foil, gold foil, silver foil, indium foil, etc., preferably aluminum foil and indium foil.

[0075] In the embodiment of the present application, the composite material structure may include a hot stamping layer, which may be formed on the surface of the fiber cloth by a hot stamping process, and by hot stamping metal on the surface of the fiber cloth, a bright line or shiny effect is formed by the high reflection of the metal component. When the composite material structure is applied to a housing and an electronic device, the appearance of the housing and the electronic device can be enriched, and the appearance of the housing and the electronic device can be improved.

[0076] It should be noted that the bright lines or sequins formed in the embodiments of the present application may be ordered or disordered, and the present application does not limit this. Regular bright lines or sequins may be produced according to actual needs, or disordered bright lines or sequins may be produced.

[0077] In combination with the third aspect, in certain implementations of the third aspect, the hot stamping layer includes any one of the following: gold, silver, aluminum, indium, nickel, titanium, 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.

[0078] For example, the fiber cloth can be a woven cloth, or a mesh cloth, a felt cloth, or the like.

[0079] In conjunction with the third aspect, in certain implementations of the third aspect, the thickness of the hot stamping layer is between 0.01 mm 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 the bright line or sequins presented by the effect layer is better. In addition, the reliability of the hot stamping layer is higher, and the production cost is reduced accordingly.

[0080] In conjunction with the third aspect, in certain implementations of the third aspect, a layer of the first fiber prepreg has a thickness between 0.07 and 0.15 mm. In some embodiments, a layer of the first fiber prepreg has a thickness 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, so that when the composite material structure is applied to a shell, the shell thickness is within a certain range to prevent the shell from being too thick.

[0081] In combination with the third aspect, in certain implementations of the third aspect, the resin wrapping the fiber sheet is a modified resin containing fluorine, and the refractive index of the modified resin containing fluorine is between 1.3 and 1.4.

[0082] It should be understood that the resin impregnated in the first fiber prepreg may be a fluorine-containing resin, and its refractive index is between 1.3-1.4, which is lower than the refractive index of conventional resins (the refractive index of conventional resins is about 1.5-1.6). When the human eye observes the composite material structure, the air is first seen, 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 relatively low, the bright lines or sequins of the effect layer will be more transparent in visual effect, and the effect presented will be better.

[0083] In addition, if fluorine-containing resin is not used, the coating layer needs to be thicker (such as 2000nm) in order to maintain good visual effects. The thicker the coating layer, the greater the reliability risk and the higher the cost. If fluorine-containing resin is used, the thickness of the coating layer can be reduced to 1200nm or even 1000nm, which can further solve the problem of thick coating layer, thereby reducing the reliability and mass production risks.

[0084] In combination with the third aspect, in certain implementations of the third aspect, the composite material structure also includes at least one layer of second fiber prepreg stacked with the first fiber prepreg, and the second fiber prepreg includes a fiber woven fabric and a resin wrapping the fiber woven fabric.

[0085] The second fiber prepreg may be understood as a fiber composite material pre-impregnated with resin. The fiber composite material here may be a fiber woven fabric, so the second fiber prepreg may also be referred to as a fiber prepreg fabric.

[0086] It should be noted that the second fiber prepreg is a fiber woven fabric impregnated with the resin to be cured, and the first fiber prepreg is a fiber sheet impregnated with the resin to be cured. The main difference between the two is that the materials of the impregnation layer in the resin to be cured are different. The material impregnated in the second fiber prepreg is a fiber woven fabric, and the material impregnated in the first fiber prepreg is the fiber sheet provided in the present application, which includes a hot stamping layer, and the hot stamping layer can achieve a brightening effect.

[0087] Exemplarily, the composite material structure includes 2 to 8 layers of laminates, preferably 2 to 5 layers. The first fiber prepreg can be placed in any layer, preferably in any layer from the 1st to the 3rd layer, and the remaining laminates can be the second fiber prepreg.

[0088] Exemplarily, the second fiber prepreg may be colored, or colorless and translucent, or colorless and transparent, preferably colorless and transparent.

[0089] It should be understood that in order to prevent the first fiber prepreg from being blocked, the second fiber prepreg on the first fiber prepreg should be colorless and transparent. The second fiber prepreg below the first fiber prepreg can be colored or colorless and transparent, and there is no limitation on this.

[0090] Exemplarily, the resin wrapping the fiber woven fabric may include at least one of the following: cellulose acetate, nylon, polyurethane, polycarbonate, polymethyl methacrylate, polyethylene terephthalate, epoxy resin, acrylic resin, phenolic resin, and silicone resin.

[0091] Exemplarily, the material of the fiber woven fabric may include any one of the following: glass fiber, basalt fiber, carbon fiber, aramid fiber, ceramic fiber, PET fiber, UHMWPE fiber, PBO fiber, PI fiber, polypropylene fiber, hemp fiber, bamboo fiber. Among them, the material of the fiber woven fabric is preferably glass fiber, followed by UHMWPE fiber.

[0092] Exemplarily, the thickness of a layer of the second fiber prepreg is between 0.07-0.15 mm. In some embodiments, the thickness of a layer of the second fiber prepreg may be between 0.08-0.11 mm. By limiting the thickness of the second fiber prepreg, the resulting composite material structure is within a certain range, so that when the composite material structure is applied to the shell, the shell thickness is within a certain range to avoid the shell being too thick.

[0093] In conjunction with the third aspect, in certain implementations of the third aspect, in order to present a better visual effect, the fibers (i.e., fiber filaments) constituting the fiber cloth should not be too thick, and the maximum cross-sectional width of the fibers (i.e., fiber filaments) constituting the fiber cloth is between 1-30 μm. Optionally, in order to present a higher visual effect, the maximum cross-sectional width of the fibers constituting the fiber cloth may be between 3-10 μm.

[0094] For example, the cross-section of the fibers (ie, fiber filaments) constituting the fiber cloth may be solid or hollow. When the cross-section is a hollow structure, a ring-shaped bright line may be formed.

[0095] For example, the cross-sectional shape of the fibers (ie, fiber filaments) constituting the fiber cloth may be circular, square, or polygonal.

[0096] In combination with the third aspect, in certain implementations of the third aspect, the composite material structure further includes a first coating layer, which is located on a side of the bronzing layer away from the fiber cloth. Exemplarily, the first coating layer includes a first texture layer, a first bonding layer, a second texture layer, and a second bonding layer, which are stacked in sequence. The first texture layer is an outer texture layer, which is a surface layer that can be touched by a human hand, and the outer texture layer can increase the touch. The second texture layer is an inner texture layer that cannot be touched directly by a human hand. The first bonding layer and the second bonding layer are transition bonding layers, the first bonding layer is connected between the first texture layer and the second texture layer, and the second bonding layer can be connected to the first fiber prepreg, so that the composite material structure formed can include: fiber cloth, bronzing layer, second bonding layer, second texture layer, first bonding layer, and first texture layer in sequence from the bottom layer to the top layer, the fiber cloth is the innermost layer, which cannot be touched directly by a human hand, and the first texture layer is the outermost layer, which can be touched directly by a human hand.

[0097] Exemplarily, the second texture layer may be coated, and the deposited SiO2 / Nb2O5 or SiO2 / TiO2 of the coating is repeated in more than two groups, and the total thickness of the coating layer on the second texture layer is between 50-400 nm.

[0098] It should be understood that the second texture layer combined with the first fiber prepreg provided in the present application, or in other words, the second texture layer combined with the multiple coating layers provided in the present application can visually present an effect of spatial layering. The superimposed spatial effect will make the resulting composite material structure or shell more beautiful.

[0099] Exemplarily, 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, which is located on the side of the fiber cloth away from the first coating, and is a colored coating. It should be understood that the second coating mainly serves to shield the electronic device and can also serve as a primer, for example, the base color (second coating) may be uniform red, white, black, etc.

[0100] In a fourth aspect, a method for manufacturing a composite material structure is provided, the manufacturing method comprising: obtaining a fiber cloth; setting a plurality of coating layers on the surface of the fiber cloth by a coating process, wherein the difference in refractive index between two adjacent layers of the plurality of coating layers is greater than or equal to 0.4; and pre-impregnating the fiber cloth with the plurality of coating layers in a resin to form a first fiber prepreg.

[0101] It should be understood that the first fiber prepreg formed in the above manner includes a fiber sheet and a resin wrapping the fiber sheet.

[0102] Exemplarily, 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, bamboo fiber. And the fiber cloth may be colored or colorless. Among them, the material of the fiber cloth is preferably glass fiber, followed by UHMWPE fiber.

[0103] Exemplarily, 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, silicone resin. In some embodiments, in order to achieve a better visual effect, the resin may be a modified resin containing fluorine, and the refractive index of the modified resin containing fluorine is between 1.3-1.4.

[0104] In the embodiment of the present application, when making a composite material structure, multiple coating layers can be plated on the surface of the fiber cloth, and the refractive index difference between two adjacent layers of the multiple coating layers is limited 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, forming a bright line or sequin effect. When the composite material structure is applied to a housing and an electronic device, it can enrich the appearance of the housing and the electronic device and improve the appearance of the housing and the electronic device.

[0105] 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.

[0106] In conjunction with the fourth aspect, in certain implementations of the fourth aspect, providing multiple coating layers on the surface of the fiber cloth using a coating process includes: coating a first film layer on the surface of the fiber cloth, coating a second film layer on the surface of the first film layer away from the fiber cloth, coating a third film layer on the surface of the second film layer away from the fiber cloth, and coating 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 coated on the surface of the fourth film layer away from the fiber cloth.

[0107] The first film layer, the third film layer, and the fifth film layer are the first coating layer mentioned above, and the second film layer and the fourth film layer are the second coating layer mentioned above. Exemplarily, the first coating layer may be any one of silicon dioxide (SiO2), zirconium dioxide (ZrO2) or single crystal silicon, and the second coating layer may be any one of niobium pentoxide (Nb2O5), titanium dioxide (TiO2) or silicon nitride (Si3N4).

[0108] In conjunction with the fourth aspect, in certain implementations of the fourth aspect, the manufacturing method further includes: arranging a second fiber prepreg on one side and / or both sides of the first fiber prepreg. The second fiber prepreg is manufactured by an existing method, and the second fiber prepreg includes a fiber woven fabric and a resin wrapping the fiber woven fabric.

[0109] It should be understood that in order to prevent the first fiber prepreg from being blocked, the second fiber prepreg on the first fiber prepreg should be colorless and transparent. The second fiber prepreg below the first fiber prepreg can be colored or colorless and transparent, and there is no limitation on this.

[0110] Exemplarily, the thickness of one layer of the second fiber prepreg and one layer of the first fiber prepreg is between 0.07-0.15 mm. In some embodiments, the thickness of one layer of the second fiber prepreg and one layer of the first fiber prepreg is between 0.08-0.11 mm. By limiting the thickness of the second fiber prepreg and the first fiber prepreg, the resulting composite material structure is within a certain range, so that when the composite material structure is applied to the shell, the shell thickness is within a certain range to avoid the shell being too thick.

[0111] In combination with the fourth aspect, in certain implementations of the fourth aspect, the manufacturing method further includes: spraying a first coating on a side of the multiple coating layers away from the fiber cloth.

[0112] Exemplarily, the first coating layer includes a first texture layer, a first bonding layer, a second texture layer, and a second bonding layer, which are stacked in sequence. The first texture layer is an outer texture layer, which is a surface layer that can be touched by human hands, and the outer texture layer can increase the touch. The second texture layer is an inner texture layer that cannot be directly touched by human hands. The first bonding layer and the second bonding layer are transition bonding layers, the first bonding layer is connected between the first texture layer and the second texture layer, and the second bonding layer can be connected to the first fiber prepreg, so that the composite material structure formed can include from the bottom layer to the top layer: fiber cloth, multiple coating layers, second bonding layer, second texture layer, first bonding layer and first texture layer in sequence, the fiber cloth is the innermost layer, which cannot be directly touched by human hands, and the first texture layer is the outermost layer, which can be directly touched by human hands.

[0113] Exemplarily, the second texture layer may be coated, and the deposited SiO2 / Nb2O5 or SiO2 / TiO2 of the coating is repeated in more than two groups, and the total thickness of the coating layer on the second texture layer is between 50-400 nm.

[0114] It should be understood that the second texture layer is combined with multiple coating layers, or in other words, the second texture layer is combined with multiple coating layers provided by the present application, which can visually present a spatial layering effect. The superimposed spatial effect will make the resulting composite material structure or shell more beautiful.

[0115] In combination with the fourth aspect, in certain implementations of the fourth aspect, the manufacturing method further includes: spraying a second coating on a side of the fiber cloth away from the multiple coating layers.

[0116] It should be understood that when the first fiber prepreg and / or the second fiber prepreg is colorless and transparent, a second coating can also be sprayed, and the second coating is located on the side of the fiber cloth away from the multiple coating layers, and the second coating is a colored coating. It should be understood that the second coating mainly plays the role of shielding electronic devices and can play the role of primer. For example, the base color (second coating) can be uniform red, white, black, etc.

[0117] In a fifth aspect, a method for manufacturing a composite material structure is provided, which manufacturing method includes: obtaining a fiber cloth; coating a sixth film layer on the surface of the fiber cloth by a film coating process; coating a metal coating layer on the side of the sixth film layer away from the fiber cloth by a film coating process; coating a seventh film layer on the side of the metal coating layer away from the sixth film layer by a film coating process; pre-impregnating the fiber cloth with multiple coatings (sixth film layer, metal coating layer and seventh film layer) in resin to form a first fiber prepreg.

[0118] The sixth film layer and the seventh film layer are both the third coating layer mentioned above. Exemplarily, the third coating layer is any one of silicon dioxide, zirconium dioxide or single crystal silicon, and the metal coating layer is any one of gold, silver, aluminum, indium, nickel, titanium or chromium.

[0119] It should be understood that the first fiber prepreg formed in the above manner includes a fiber sheet and a resin wrapping the fiber sheet.

[0120] Exemplarily, 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, bamboo fiber. And the fiber cloth may be colored or colorless. Among them, the material of the fiber cloth is preferably glass fiber, followed by UHMWPE fiber.

[0121] Exemplarily, 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, silicone resin. In some embodiments, in order to achieve a better visual effect, the resin may be a modified resin containing fluorine, and the refractive index of the modified resin containing fluorine is between 1.3-1.4.

[0122] In the embodiment of the present application, when manufacturing the composite material structure, multiple coating layers (sixth coating layer, metal coating layer and seventh coating layer) can be plated on the surface of the fiber cloth, and the high reflection of the metal coating layer in the multiple coating layers can form a bright line or shiny effect. When the composite material structure is applied to the housing and electronic equipment, it can enrich the appearance of the housing and the electronic equipment and improve the appearance of the housing and the electronic equipment.

[0123] 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.

[0124] In conjunction with the fifth aspect, in certain implementations of the fifth aspect, the manufacturing method further includes: arranging a second fiber prepreg on one side and / or both sides of the first fiber prepreg. The second fiber prepreg is manufactured by an existing method, and the second fiber prepreg includes a fiber woven fabric and a resin wrapping the fiber woven fabric.

[0125] It should be understood that in order to prevent the first fiber prepreg from being blocked, the second fiber prepreg on the first fiber prepreg should be colorless and transparent. The second fiber prepreg below the first fiber prepreg can be colored or colorless and transparent, and there is no limitation on this.

[0126] Exemplarily, the thickness of one layer of the second fiber prepreg and one layer of the first fiber prepreg is between 0.07-0.15 mm. In some embodiments, the thickness of one layer of the second fiber prepreg and one layer of the first fiber prepreg is between 0.08-0.11 mm. By limiting the thickness of the second fiber prepreg and the first fiber prepreg, the resulting composite material structure is within a certain range, so that when the composite material structure is applied to the shell, the shell thickness is within a certain range to avoid the shell being too thick.

[0127] In combination with the fifth aspect, in certain implementations of the fifth aspect, the manufacturing method further includes: spraying a first coating on a side of the seventh film layer away from the fiber cloth.

[0128] Exemplarily, the first coating layer includes a first texture layer, a first bonding layer, a second texture layer, and a second bonding layer, which are stacked in sequence. The first texture layer is an outer texture layer, which is a surface layer that can be touched by human hands, and the outer texture layer can increase the touch. The second texture layer is an inner texture layer that cannot be directly touched by human hands. The first bonding layer and the second bonding layer are transition bonding layers, the first bonding layer is connected between the first texture layer and the second texture layer, and the second bonding layer can be connected to the first fiber prepreg, so that the composite material structure formed can include from the bottom layer to the top layer: fiber cloth, multiple coating layers, second bonding layer, second texture layer, first bonding layer and first texture layer in sequence, the fiber cloth is the innermost layer, which cannot be directly touched by human hands, and the first texture layer is the outermost layer, which can be directly touched by human hands.

[0129] Exemplarily, the second texture layer may be coated, and the deposited SiO2 / Nb2O5 or SiO2 / TiO2 of the coating is repeated in more than two groups, and the total thickness of the coating layer on the second texture layer is between 50-400 nm.

[0130] It should be understood that the second texture layer is matched with multiple coating layers (sixth film layer, metal coating layer and seventh film layer) to visually present a spatial layering effect. The superimposed spatial effect will make the resulting composite material structure or shell more beautiful.

[0131] In combination with the fifth aspect, in certain implementations of the fifth aspect, the manufacturing method further includes: spraying a second coating on a side of the fiber cloth away from the sixth film layer.

[0132] It should be understood that when the first fiber prepreg and / or the second fiber prepreg is colorless and transparent, a second coating can also be sprayed, and the second coating is located on the side of the fiber cloth away from the sixth film layer, and the second coating is a colored coating. It should be understood that the second coating mainly plays the role of shielding electronic devices and can play the role of primer. For example, the base color (second coating) can be uniform red, white, black, etc.

[0133] In a sixth aspect, a method for manufacturing a composite material structure is provided, the manufacturing method comprising: obtaining a fiber cloth; transferring a metal foil material to the fiber cloth through a hot stamping process to form a hot stamping layer (having a bright pattern); pre-impregnating the fiber cloth with the hot stamping layer in a resin to form a first fiber prepreg.

[0134] The hot stamping layer is any one of gold, silver, aluminum, indium, nickel, titanium or chromium. Exemplarily, the metal foil can be aluminum foil, gold foil, silver foil, indium foil, etc., preferably aluminum foil and indium foil.

[0135] It should be understood that in order to achieve a better brightening effect, the thickness of the hot stamping layer may be limited to between 0.01 mm and 0.02 mm.

[0136] It should be understood that the first fiber prepreg formed in the above manner includes a fiber sheet and a resin wrapping the fiber sheet.

[0137] Exemplarily, 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, bamboo fiber. And the fiber cloth may be colored or colorless. Among them, the material of the fiber cloth is preferably glass fiber, followed by UHMWPE fiber.

[0138] Exemplarily, 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, silicone resin. In some embodiments, in order to achieve a better visual effect, the resin may be a modified resin containing fluorine, and the refractive index of the modified resin containing fluorine is between 1.3-1.4.

[0139] In the embodiment of the present application, when manufacturing the composite material structure, a hot stamping metal layer can be formed on the surface of the fiber cloth through a hot stamping process, and a bright line or shiny effect can be formed through the high reflection of the metal. When the composite material structure is applied to a housing and an electronic device, the appearance of the housing and the electronic device can be enriched and the appearance of the housing and the electronic device can be improved.

[0140] In combination with the sixth aspect, in certain implementations of the sixth aspect, the manufacturing method includes: obtaining one or more of the first fiber prepregs, and stacking the one or more of the first fiber prepregs to form a composite material structure.

[0141] In conjunction with the sixth aspect, in certain implementations of the sixth aspect, the manufacturing method further includes: arranging a second fiber prepreg on one side and / or both sides of the first fiber prepreg. The second fiber prepreg is manufactured by an existing method, and the second fiber prepreg includes a fiber woven fabric and a resin wrapping the fiber woven fabric.

[0142] It should be understood that in order to prevent the first fiber prepreg from being blocked, the second fiber prepreg on the first fiber prepreg should be colorless and transparent. The second fiber prepreg below the first fiber prepreg can be colored or colorless and transparent, and there is no limitation on this.

[0143] Exemplarily, the thickness of one layer of the second fiber prepreg and one layer of the first fiber prepreg is between 0.07-0.15 mm. In some embodiments, the thickness of one layer of the second fiber prepreg and one layer of the first fiber prepreg is between 0.08-0.11 mm. By limiting the thickness of the second fiber prepreg and the first fiber prepreg, the resulting composite material structure is within a certain range, so that when the composite material structure is applied to the shell, the shell thickness is within a certain range to avoid the shell being too thick.

[0144] In combination with the sixth aspect, in certain implementations of the sixth aspect, the manufacturing method further includes: spraying a first coating on a side of the hot stamping layer away from the fiber cloth.

[0145] Exemplarily, the first coating layer includes a first texture layer, a first bonding layer, a second texture layer, and a second bonding layer, which are stacked in sequence. The first texture layer is an outer texture layer, which is a surface layer that can be touched by human hands, and the outer texture layer can increase the touch. The second texture layer is an inner texture layer that cannot be directly touched by human hands. The first bonding layer and the second bonding layer are transition bonding layers, the first bonding layer is connected between the first texture layer and the second texture layer, and the second bonding layer can be connected to the first fiber prepreg, so that the composite material structure formed can include from the bottom layer to the top layer: fiber cloth, multiple coating layers, second bonding layer, second texture layer, first bonding layer and first texture layer in sequence, the fiber cloth is the innermost layer, which cannot be directly touched by human hands, and the first texture layer is the outermost layer, which can be directly touched by human hands.

[0146] Exemplarily, the second texture layer may be coated, and the deposited SiO2 / Nb2O5 or SiO2 / TiO2 of the coating is repeated in more than two groups, and the total thickness of the coating layer on the second texture layer is between 50-400 nm.

[0147] It should be understood that the second texture layer combined with the hot stamping layer can visually present a spatial layering effect. The superimposed spatial effect will make the resulting composite material structure or shell more beautiful.

[0148] In combination with the sixth aspect, in certain implementations of the sixth aspect, the manufacturing method further includes: spraying a second coating on a side of the fiber cloth away from the hot stamping layer.

[0149] It should be understood that when the first fiber prepreg and / or the second fiber prepreg is colorless and transparent, a second coating can also be sprayed, and the second coating is located on the side of the fiber cloth away from the hot stamping layer, and the second coating is a colored coating. It should be understood that the second coating mainly plays the role of shielding electronic devices and can play the role of primer. For example, the base color (second coating) can be uniform red, white, black, etc.

[0150] In the seventh aspect, a shell is provided, which is made of the composite material structure of the first aspect and any implementation method of the first aspect, or the shell is made of the composite material structure of the second aspect and any implementation method of the second aspect, or the shell is made of the composite material structure of the third aspect and any implementation method of the third aspect.

[0151] In an eighth aspect, an electronic device is provided, comprising a shell, wherein the shell is made of the composite material structure of the first aspect and any implementation manner of the first aspect, or the shell is made of the composite material structure of the second aspect and any implementation manner of the second aspect, or the shell is made of the composite material structure of the third aspect and any implementation manner of the third aspect.

[0152] In some embodiments, the electronic device further comprises a transparent cover plate covered on the housing, the housing and the transparent cover plate cooperate to form a housing space, and the housing space is provided with components such as a display module, a touch module, a chip, a battery, and a circuit board of the electronic device. The surface of the transparent cover plate away from the housing is a touch display surface of the electronic device.

[0153] Exemplarily, the electronic device may be an electronic device having a housing, such as a mobile terminal such as a mobile phone, a wearable device, a smart watch, a tablet computer, an e-reader, a notebook computer, a laptop computer, a mobile computer, an augmented reality device, a virtual reality device, and a handheld game console, etc., but the present application does not limit this. BRIEF DESCRIPTION OF THE DRAWINGS

[0154] Figure 1 The present application shows a schematic flow chart of a shell appearance processing process.

[0155] Figure 2 It is a cross-sectional schematic diagram of a composite material structure provided in an embodiment of the present application.

[0156] Figure 3 It is a cross-sectional schematic diagram of another composite material structure provided in an embodiment of the present application.

[0157] Figure 4 It is a cross-sectional schematic diagram of another composite material structure provided in an embodiment of the present application.

[0158] Figure 5 Schematic diagram of the first fiber prepreg provided in an embodiment of the present application.

[0159] Figure 6 It is a schematic flow chart of a shell appearance processing process provided in an embodiment of the present application.

[0160] Figure 7 It is a schematic flow chart of another shell appearance processing process provided in an embodiment of the present application.

[0161] Figure 8 It is a schematic diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0162] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0163] In the embodiments of the present application, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" can sensibly or implicitly include one or more features. In addition, in the description of the embodiments of the present application, "multiple" refers to two or more than two, and "at least one" and "one or more" refer to one, two or more. The singular expressions "one", "a kind", "said", "above", "the" and "this" are intended to also include expressions such as "one or more", unless there is a clear indication to the contrary in the context. The size of the sequence number of each process below does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application. For example, in the embodiments of the present application, the words "110", "120", "130" and the like are only marks made for the convenience of description, and do not limit the order of execution steps. The term "and / or" is used to describe the association relationship of associated objects, indicating that there can be three relationships; for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0164] References to "one embodiment" or "some embodiments" etc. described in this specification mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear at different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0165] In the description of the embodiments of the present application, the directions or positional relationships indicated by the terms "upper" and "lower" are defined relative to the directions or positions of the components schematically placed in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, rather than indicating or implying that the device or component referred to must have a specific direction, or be constructed and operated in a specific direction. They may change accordingly according to the changes in the directions of the components placed in the drawings, and therefore cannot be understood as limitations on the present application.

[0166] In order to highlight the high-end quality of electronic devices, electronic device manufacturers are paying more and more attention to the decorative appearance of the housing of electronic devices. For example, colors can be set on the housing so that the electronic device can display a variety of body colors. For another example, textures can be set on the housing so that the appearance of the electronic device can have visual effects such as matte and frosted.

[0167] Fiber composite materials have the characteristics of high strength and low density. When used as the shell material of electronic devices, they are light and not easy to break when dropped, so they are the key shell material of future electronic devices. Due to the molding process of fiber composite materials and the characteristics of composite materials, fiber grains are easily visible on the shell material, resulting in a general sense of quality and lack of beauty. Especially when used as the back cover material of high-end products such as flagship mobile phones and tablets, it greatly affects the overall aesthetics and value of the product.

[0168] At present, the main surface treatment processes for shell materials are spray coating plus rubbing, curtain coating plus transfer printing or curtain coating plus rubbing, etc. However, these traditional processes can only achieve a flat effect, which is difficult to achieve differentiation, and cannot bring consumers a richer appearance effect and improve the appearance of the product.

[0169] For example, Figure 1 As shown, Figure 1 A schematic flow chart of a shell appearance treatment process is shown.

[0170] Step 101: obtain a plurality of fiber prepregs, and the plurality of fiber prepregs may be stacked.

[0171] The fiber prepreg cloth may also be referred to as a second fiber prepreg 110 . The second fiber prepreg 110 may be understood as a fiber composite material pre-impregnated with resin. The fiber composite material here may be a fiber woven cloth.

[0172] Exemplarily, the second fiber prepreg 110 may be a fiber woven fabric impregnated with a resin to be cured. That is, the second fiber prepreg 110 may include a fiber woven fabric and a resin wrapping the fiber woven fabric. The resin wrapping the fiber woven fabric may include at least one of the following: cellulose acetate, nylon, polyurethane, polycarbonate, polymethyl methacrylate, polyethylene terephthalate, epoxy resin, acrylic resin, phenolic resin, silicone resin, which is not limited in the present application.

[0173] Exemplarily, the second fiber prepreg 110 may be colored, colorless and translucent, or colorless and transparent, and is preferably colorless and transparent.

[0174] Exemplarily, the fiber woven fabric is a fabric formed by weaving fibers together using a textile machine. 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, bamboo fiber. Among them, the material of the fiber woven fabric is preferably glass fiber, followed by UHMWPE fiber.

[0175] Step 102 : Compression-molding a plurality of stacked second fiber prepregs 110 to form a first fiber composite material shell material 120 .

[0176] Among them, compression molding is a manufacturing process that is commonly used to process parts or products made of plastics, metals and other materials. This process heats the material to a softened state, then places it in a mold and applies high pressure to form it into the desired shape inside the mold. Once cooled and solidified, the material will retain the molded shape.

[0177] In this step, a plurality of stacked second fiber prepregs 110 may be heated to a softened state and then placed in a mold to form a desired shape inside the mold, for example, Figure 1 The mobile phone shell is formed and finally cooled and solidified to form a first fiber composite material shell material 120 (such as a mobile phone shell material).

[0178] Step 103 , spraying and rubbing are performed on one side of the first fiber composite material shell material 120 to form a first coating layer 130 .

[0179] It should be understood that spraying the first coating 130 on the surface of the first fiber composite material shell material 120 can achieve a texture structure of the surface layer and enhance the touch.

[0180] It should be noted that, in step 103, the first coating layer 130 may be formed by spray coating and rubbing, or may be formed by flow coating and transfer printing or flow coating and rubbing printing.

[0181] Among them, spray coating plus rubbing can transfer a pattern or image to a target surface. In this process, the coating is first applied evenly to the printing medium in the form of a spray using spray technology. Then, using rubbing technology, the printing medium is brought into contact with the target surface and a certain amount of pressure is applied to transfer the coating from the medium to the target surface to form the desired pattern or image. Flow coating plus transfer is used to transfer a pattern or image from a printing medium to a target surface. In this process, the image is first printed on a special transfer paper, and then the transfer paper is brought into contact with the target surface (such as ceramics, glass, etc.), and the pattern is transferred from the transfer paper to the target surface by applying a certain amount of pressure and heat. Flow coating plus rubbing is a printing process that combines flow coating and rubbing technology. In this process, the coating is first applied evenly to the printing medium using flow coating technology. Then, the printing medium is brought into contact with the target surface and a certain amount of pressure is applied to transfer the coating from the medium to the target surface. During this process, a rubbing process may be used to ensure the accurate transfer of the pattern.

[0182] Step 104 , cutting the first fiber composite material shell material 120 and the first coating 130 to form a shell 140 .

[0183] It should be noted that there may be a difference between the shape of the first fiber composite material housing material 120 formed in step 102 and the shape of the electronic device housing that needs to be produced. The shape after compression molding is not precise, so it is necessary to cut according to the final shape. For example, the camera area of ​​the mobile phone needs to be hollowed out. After step 104, the final mobile phone housing can be formed, and the formed housing can be directly assembled on the mobile phone.

[0184] From the above processing steps, it can be seen that since the base material (second fiber prepreg 110) constituting the shell has a single color brightness, the laminated layers composed of the second fiber prepreg are integrated and have uniform color (such as pure black, pure white, etc.), so the shell finally formed is an integrated effect, which cannot achieve richer effects, is difficult to differentiate, and cannot bring consumers richer appearance effects and enhance the appearance of the product.

[0185] Therefore, the present application provides a composite material structure, a shell and an electronic device. The composite material structure can achieve bright lines or a glare effect. When the composite material structure is applied to the shell and the electronic device, it can enrich the appearance of the shell and the electronic device and improve the appearance of the shell and the electronic device.

[0186] Figures 2 to 5 It is a schematic cross-sectional view of three composite material structures provided in the embodiments of the present application.

[0187] The composite material structure provided in the present application may include at least one layer of a first fiber prepreg 210, and the first fiber prepreg 210 may include a fiber sheet 212 and a resin 211 wrapping the fiber sheet, wherein the first fiber prepreg 210 may be understood as a fiber material pre-impregnated with resin, and the fiber material here may be the fiber sheet 212 of the present application, and the first fiber prepreg 210 may be a fiber prepreg sheet with a brightening effect.

[0188] It should be understood that the fiber sheet 212 may be formed on the surface of the fiber cloth 2120 by a coating process, or may be formed by a hot stamping process.

[0189] In some embodiments, Figure 2 As shown, the fiber sheet 212 includes a fiber cloth 2120 and a plurality of coating layers located on the surface of the fiber cloth 2120, and the difference in refractive index between two adjacent layers of the plurality of coating layers is greater than or equal to 0.4. The fiber cloth 2120 may be a woven cloth, or a mesh cloth, a felt cloth, etc. The fiber cloth 2120 may be colored or colorless.

[0190] Exemplarily, the fiber sheet 212 includes a fiber cloth 2120 and a plurality of coating layers on the surface of the fiber cloth, wherein the plurality of coating layers on the surface of the fiber cloth may also be referred to as effect layers (effect layers with a brightening effect), and the effect layers may be obtained by coating. That is, some colored coating layers or brightening and reflective effect layers may be plated on the fiber cloth 2120, so that the composite material structure finally obtained can show bright lines or a colored glare.

[0191] In this embodiment, by limiting the refractive index difference between two adjacent layers of the multiple coating layers in the composite material structure to 0.4 or above, that is, by repeatedly stacking low-refractive index materials and high-refractive index materials in sequence, a difference in brightness is formed by the difference in refractive index, thereby forming the effect of bright lines or sequins. When the composite material structure is applied to a housing and an electronic device, the appearance of the housing and the electronic device can be enriched, and the appearance of the housing and the electronic device can be improved.

[0192] For example, Figure 2As shown, the multiple coating layers may include multiple first coating layers and multiple second coating layers alternately stacked, and the total thickness of the first coating layer and the second coating layer is between 600-2000nm, that is, the total thickness of the multiple coating layers is between 600-2000nm. Exemplarily, the first coating layer may be in contact with the fiber cloth 2120, that is, the first film layer 2121 is first coated on the fiber cloth, then the second film layer 2122, then the third film layer 2123, and then the fourth film layer 2124, and they are stacked in sequence. Among them, the first film layer 2121 and the third film layer 2123 are the first coating layer, and the second film layer 2122 and the fourth film layer 2124 are the second coating layer.

[0193] It should be understood that by limiting the thickness of the plurality of coating layers to a suitable range, the effect layer can present a better bright line or bright piece effect. In addition, the coating layer has a higher reliability and the manufacturing cost can be reduced accordingly.

[0194] Exemplarily, the first coating layer may be any one of silicon dioxide (SiO2), zirconium dioxide (ZrO2) or single crystal silicon, and the second coating layer may be any one of niobium pentoxide (Nb2O5), titanium dioxide (TiO2) or silicon nitride (Si3N4).

[0195] For example, the multiple coating layers may include two or more stacks of SiO2 / Nb2O5, or two or more stacks of SiO2 / TiO2. That is, the multiple 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 difference in refractive index between two adjacent layers is greater than or equal to 0.4.

[0196] In some examples, in order to achieve a better visual effect of bright lines or sequins, a fifth film layer may be provided on the side of the fourth coating layer 2124 away from the fiber cloth 2120. That is, the plurality of coating layers may include five stacked layers, which may be stacked layers of SiO2 / Nb2O5 / SiO2 / Nb2O5 / SiO2, or stacked layers of SiO2 / TiO2 / SiO2 / TiO2 / SiO2, and the difference in refractive index between two adjacent layers is greater than or equal to 0.4.

[0197] Exemplarily, in an embodiment of the present application, the deposit can be deposited onto the surface (one side or both sides) of the fiber cloth by vacuum physical deposition. For example, it can be deposited onto the surface of the glass fiber by vacuum physical deposition. The deposit can be SiO2 / Nb2O5 or SiO2 / TiO2 repeated in 2 or more layers.

[0198] In some embodiments, Figure 3As shown, the fiber sheet 212 includes a fiber cloth 2120 and a plurality of coating layers located on the surface of the fiber cloth 2120, wherein the plurality of coating layers include a metal coating layer 2125 and a third coating layer (the third coating layer 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 may be a woven cloth, a mesh cloth, a felt cloth, etc. The fiber cloth 2120 may be colored or colorless.

[0199] In this embodiment, the multiple coating layers in the composite material structure may include a metal coating, that is, the metal coating may be plated on the surface of the fiber cloth. Since the reflectivity of the metal coating is relatively high, a bright line or shiny effect may be formed by the reflection of the metal component. When the composite material structure is applied to a housing and an electronic device, the appearance of the housing and the electronic device can be enriched and the appearance of the housing and the electronic device can be improved.

[0200] Exemplarily, the metal coating 2125 may be any one of gold, silver, aluminum, indium, nickel, titanium or chromium, and the third coating may be any one of silicon dioxide, zirconium dioxide or single crystal silicon.

[0201] It should be understood that the metal coating 2125 can be made of a metal material with high reflectivity, such as gold, silver, aluminum, indium, nickel, titanium or chromium. In addition, the third coating is located on both sides of the metal coating 2125. The third coating is made of a material with relatively good stability, such as silicon dioxide, zirconium dioxide or single crystal silicon. The third coating can protect the metal coating and prevent the metal coating 2125 from corrosion and oxidation.

[0202] For example, Figure 3 As shown, the multiple coating layers may include three stacked layers, which sequentially include the sixth film layer 2126, the metal coating layer 2125 and the seventh film layer 2127, and the sixth film layer 2126 is in contact with the fiber cloth 2120. For example, the multiple coating layers may include a SiO2 / In / SiO2 stacked layer. That is, the multiple coating layers may include three stacked layers, which may be a silicon dioxide layer, an indium layer and a silicon dioxide layer, and the silicon dioxide layer is in contact with the fiber cloth 2120.

[0203] In an embodiment of the present application, the deposit can be deposited onto the surface (one side or both sides) of the fiber cloth 2120 by vacuum physical deposition. For example, the deposit can be deposited onto the surface of the glass fiber by vacuum physical deposition, and the deposit can be a SiO2 / In / SiO2 laminate.

[0204] Exemplarily, the total thickness of the plurality of coating layers is between 50-400 nm, that is, the total thickness of the metal coating layer 2125, the sixth film layer 2126 and the seventh film layer 2127 is between 50-400 nm. The thickness of the metal coating layer 2125 is between 2-20 nm.

[0205] It should be understood that by limiting the thickness of the multiple coating layers and the thickness of the metal coating layer 2125 within a suitable range, the bright line or bright piece effect of the effect layer is better. In addition, the reliability of the coating layer is higher and the production cost is reduced accordingly.

[0206] In some embodiments, Figure 4 As 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.

[0207] It should be understood that the hot stamping process uses the principle of heat pressure transfer to transfer the aluminum layer in the electroplated aluminum to the surface of the substrate to form a special metal effect.

[0208] In this embodiment, the composite material structure may include a hot stamping layer, which may be formed on the surface of the fiber cloth by a hot stamping process, and by hot stamping metal on the surface of the fiber cloth, a bright line or shiny effect is formed by high reflection of the metal component. When the composite material structure is applied to a housing and an electronic device, the appearance of the housing and the electronic device can be enriched, and the appearance of the housing and the electronic device can be improved.

[0209] Exemplarily, the hot stamping layer 2128 may be formed by transferring on one side of the fiber cloth 2120 through a hot stamping process, or the hot stamping layer 2128 may be formed by transferring on both sides of the fiber cloth 2120 through a hot stamping process. That is, the metal foil material may be transferred to the fiber cloth (such as glass fiber cloth) through a hot stamping process to form a bright pattern; the transfer may be on one side or on both sides. The metal foil may be aluminum foil, gold foil, silver foil, indium foil, etc., preferably aluminum foil and indium foil.

[0210] Exemplarily, the hot stamping layer 2128 may include any one of the following: gold, silver, aluminum, indium, nickel, titanium, and chromium.

[0211] Exemplarily, the thickness of the hot stamping layer 2128 is between 0.01 mm 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 the bright line or bright piece presented by the effect layer is better. In addition, the reliability of the hot stamping layer 2128 is higher, and the production cost will be reduced accordingly.

[0212] In some examples, the resin 211 wrapping the fiber sheet may include at least one of the following: cellulose acetate, nylon, polyurethane, polycarbonate, polymethyl methacrylate, polyethylene terephthalate, epoxy resin, acrylic resin, phenolic resin, and silicone resin.

[0213] Exemplarily, the resin 211 wrapping the fiber sheet may be a modified resin containing fluorine, and the refractive index of the modified resin containing fluorine is between 1.3 and 1.4.

[0214] It should be understood that the impregnated resin 211 in the first fiber prepreg 210 may be a fluorine-containing resin, and its refractive index is between 1.3-1.4, which is lower than the refractive index of conventional resins (the refractive index of conventional resins is about 1.5-1.6). When the human eye observes the composite material structure, the air is first seen, 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 relatively low, the bright lines or sequins of the effect layer will be more visually transparent, and the effect will be better.

[0215] In addition, if fluorine-containing resin is not used, the coating layer needs to be thicker (such as 2000nm) in order to maintain good visual effects. The thicker the coating layer, the greater the reliability risk and the higher the cost. If fluorine-containing resin is used, the thickness of the coating layer can be reduced to 1200nm or even 1000nm, which can further solve the problem of thick coating layer, thereby reducing the reliability and mass production risks and reducing costs.

[0216] 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, bamboo fiber. Among them, the material of the fiber cloth 2120 is preferably glass fiber, followed by UHMWPE fiber.

[0217] 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.

[0218] For example, Figure 5 As shown, Figure 5 The schematic top view of the first fiber prepreg 210 is shown. The first fiber prepreg 210 may be composed of a resin 211 to be cured and a fiber sheet 212, and the fiber sheet 212 may be ordered or disordered.

[0219] In one example, if Figure 5 As shown in (a) in FIG. 1 , the fiber sheets 212 may be arranged in one direction and may form a disordered light effect.

[0220] In one example, if Figure 5As shown in (b) in FIG. 1 , the fiber sheets 212 may be arranged in bundles and may form an orderly bright effect.

[0221] In one example, if Figure 5 As shown in (c) in FIG. 1 , the fiber sheet 212 may be arranged in multiple directions and may form a bright line composition.

[0222] In some examples, the composite material structure may further include at least one layer of second fiber prepreg 110 stacked with the first fiber prepreg 210 , wherein the second fiber prepreg 110 includes a fiber woven fabric and a resin wrapping the fiber woven fabric.

[0223] The second fiber prepreg 110 may be understood as a fiber composite material pre-impregnated with resin. The fiber composite material here may be a fiber woven fabric, so the second fiber prepreg may also be referred to as a fiber prepreg fabric.

[0224] It should be noted that the second fiber prepreg 110 is a fiber woven fabric impregnated with a resin to be cured, and the first fiber prepreg 210 is a fiber sheet impregnated with a resin to be cured. The main difference between the two is that the materials of the impregnation layer in the resin to be cured are different. The material impregnated in the second fiber prepreg 110 is a fiber woven fabric, and the material impregnated in the first fiber prepreg 210 is a fiber sheet provided in the present application, which includes multiple coating layers or hot stamping layers, and multiple coating layers or hot stamping layers can achieve a brightening effect.

[0225] Exemplarily, the composite material structure includes 2 to 8 layers of laminates, preferably 2 to 5 layers. The first fiber prepreg 210 can be placed in any layer, preferably in any layer of the 1st to 3rd layers, and the remaining laminates can be the second fiber prepreg 110 .

[0226] It should be understood that the second fiber prepreg 110 on the first fiber prepreg 210 should be colorless and transparent to prevent the first fiber prepreg 210 from being blocked. The second fiber prepreg 110 below the first fiber prepreg 210 can be colored or colorless and transparent, without limitation.

[0227] It should be noted that the relevant description of the second fiber prepreg 110 can be referred to Figure 1 Related description in .

[0228] In some examples, the thickness of the single-layer second fiber prepreg 110 and / or the single-layer first fiber prepreg 210 is between 0.07-0.15 mm. In some embodiments, the thickness of the single-layer second fiber prepreg 110 and / or the single-layer first fiber prepreg 210 may be between 0.08-0.11 mm. By limiting the thickness of the single-layer second fiber prepreg 110 and / or the first fiber prepreg 210, the resulting composite material structure is within a certain range, so that when the composite material structure is applied to a shell, the shell thickness is within a certain range to prevent the shell from being too thick.

[0229] In some examples, in order to present a better visual effect, the fibers (i.e., fiber filaments) constituting the fiber cloth should not be too thick, and the maximum cross-sectional width of the fibers (i.e., fiber filaments) constituting the fiber cloth is between 1-30 μm. Alternatively, in order to present a higher visual effect, the maximum cross-sectional width of the fibers constituting the fiber cloth can be between 3-10 μm.

[0230] For example, the cross-section of the fibers (ie, fiber filaments) constituting the fiber cloth may be solid or hollow. When the cross-section is a hollow structure, a ring-shaped bright line may be formed.

[0231] For example, the cross-sectional shape of the fibers (ie, fiber filaments) constituting the fiber cloth may be circular, square, or polygonal.

[0232] In some examples, the composite material structure may further include a first coating layer, which is located on the side of the plurality of coating layers away from the fiber cloth 2120. Exemplarily, the first coating layer includes a first texture layer, a first adhesive layer, a second texture layer, and a second adhesive layer, which are sequentially stacked. The first texture layer is an outer texture layer, which is a surface layer that can be touched by human hands, and the outer texture layer can increase the touch. The second texture layer is an inner texture layer that cannot be directly touched by human hands. The first adhesive layer and the second adhesive layer are transition adhesive layers, the first adhesive layer is connected between the first texture layer and the second texture layer, and the second adhesive layer can be connected to the first fiber prepreg 210, thereby forming a composite material structure. Exemplarily, the composite material structure formed may include: fiber cloth 2120, a plurality of coating layers, a second adhesive layer, a second texture layer, a first adhesive layer, and a first texture layer from the bottom layer to the top layer, the fiber cloth 2120 is the innermost layer, which cannot be directly touched by human hands, and the first texture layer is the outermost layer, which can be directly touched by human hands.

[0233] Exemplarily, the second texture layer may be coated, and the deposited SiO2 / Nb2O5 or SiO2 / TiO2 of the coating is repeated in more than two groups, and the total thickness of the coating layer on the second texture layer is between 50-400 nm.

[0234] It should be understood that the second texture layer combined with the first fiber prepreg 210 provided in the present application, or in other words, the second texture layer combined with the multiple coating layers or hot stamping layers provided in the present application can visually present a spatial layering effect. The superimposed spatial effect will make the resulting composite material structure or shell more beautiful.

[0235] In some examples, when the first fiber prepreg 210 and / or the second fiber prepreg 110 is colorless and transparent, the composite material structure may further include a second coating, which is located on a side of the fiber cloth 2120 away from the multiple coating layers, and the second coating is a colored coating. It should be understood that the second coating mainly serves to shield the electronic device and can also serve as a primer, for example, the base color (second coating) may be uniform red, white, black, etc.

[0236] The above combination Figures 2 to 5 Three composite material structures provided in the embodiments of the present application are introduced. For the above composite material structures, the embodiments of the present application also provide corresponding methods for manufacturing the composite material structures.

[0237] In one implementation, the present application provides a method 1 for manufacturing a composite material structure: obtaining a fiber cloth 2120; setting a plurality of coating layers on the surface of the fiber cloth 2120 by a coating process, wherein the difference in refractive index between two adjacent layers in the plurality of coating layers is greater than or equal to 0.4; and pre-impregnating the fiber cloth with the plurality of coating layers in a resin 211 to form a first fiber prepreg 210.

[0238] 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.

[0239] In some embodiments, the coating process is used to set multiple coating layers on the surface of the fiber cloth, which may specifically include: coating a first film layer 2121 on the surface of the fiber cloth 2120, coating a second film layer 2122 on the surface of the first film layer 2121 away from the fiber cloth 2120, coating a third film layer 2123 on the surface of the second film layer 2122 away from the fiber cloth 2120, and coating a fourth film layer 2124 on the surface of the third film layer 2123 away from the fiber cloth 2120. It should be understood that the multiple coating layers include the first film layer 2121, the second film layer 2122, the third film layer 2123 and the fourth film layer 2124.

[0240] For example, in order to achieve a better visual effect of bright lines, a fifth film layer may be plated on the surface of the fourth film layer 2124 away from the fiber cloth 2120. It should be understood that the plurality of plated film layers may include a first film layer 2121, a second film layer 2122, a third film layer 2123, a fourth film layer 2124 and a fifth film layer.

[0241] The first film layer 2121, the third film layer 2123, and the fifth film layer are the first coating layer, and the second film layer 2122 and the fourth film layer 2124 are the second coating layer. For example, the first coating layer may be any one of silicon dioxide, zirconium dioxide, or single crystal silicon, and the second coating layer may be any one of niobium pentoxide, titanium dioxide, or silicon nitride.

[0242] In some embodiments, the manufacturing method 1 may further include: arranging a second fiber prepreg 110 on one side and / or both sides of the first fiber prepreg 210. The second fiber prepreg 110 may be described in detail in Figure 1 Related description in .

[0243] It should be understood that in order to prevent the first fiber prepreg 210 from being blocked, the second fiber prepreg 110 on the first fiber prepreg 210 may be colorless and transparent. The second fiber prepreg 110 below the first fiber prepreg 210 may be colored or colorless and transparent, and this is not limited.

[0244] In some embodiments, the manufacturing method 1 may further include: spraying a first coating on a side of the plurality of coating layers (or the fourth film layer 2124 ) away from the fiber cloth 2120 .

[0245] Exemplarily, the first coating can refer to Figure 1 , Figure 6 as well as Figure 7 The first coating 130 in.

[0246] It should be understood that the first coating layer may include a first texture layer, a first adhesive layer, a second texture layer, and a second adhesive layer stacked in sequence. The first texture layer is an outer texture layer, which is a surface layer that can be touched by human hands, and the outer texture layer can increase the touch. The second texture layer is an inner texture layer that cannot be directly touched by human hands. The first adhesive layer and the second adhesive layer are transition adhesive layers, the first adhesive layer is connected between the first texture layer and the second texture layer, and the second adhesive layer can be connected to the first fiber prepreg 210, so that the composite material structure formed can include from the bottom layer to the top layer: fiber cloth 2120, multiple coating layers, second adhesive layer, second texture layer, first adhesive layer and first texture layer in sequence, the fiber cloth 2120 is the innermost layer, which cannot be directly touched by human hands, and the first texture layer is the outermost layer, which can be directly touched by human hands.

[0247] It should be understood that the second texture layer is combined with multiple coating layers to visually present a spatial layering effect. The superimposed spatial effect will make the resulting composite material structure or shell more beautiful.

[0248] In some embodiments, the manufacturing method 1 may further include: spraying a second coating on a side of the fiber cloth 2120 away from the multiple coating layers (or the first film layer 2121 ).

[0249] Exemplarily, the second coating can refer to Figure 7 The second coating 310 in.

[0250] It should be understood that when the first fiber prepreg 210 and / or the second fiber prepreg 110 is colorless and transparent, a second coating may be sprayed, and the 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 the second coating is a colored coating. It should be understood that the second coating mainly serves to shield the electronic device and can serve as a primer, for example, the base color (second coating) may be uniform red, white, black, etc.

[0251] It should be noted that the composite material structure can be manufactured by the above-mentioned method 1 for manufacturing the composite material structure. Figure 2 The composite material structure.

[0252] In another implementation, the present application provides a method 2 for manufacturing a composite material structure: obtaining a fiber cloth 2120; coating a sixth film layer 2126 on the surface of the fiber cloth 2120 by a coating process; coating a metal coating layer 2125 on the side of the sixth film layer 2126 away from the fiber cloth 2120 by a coating process; coating a seventh film layer 2127 on the side of the metal coating layer 2125 away from the fiber cloth 2120 by a coating process; pre-impregnating the fiber cloth 2120 with multiple coatings (the multiple coatings include the sixth film layer 2126, the metal coating layer 2125 and the seventh film layer 2127) in a resin 211 to form a first fiber prepreg 210.

[0253] The sixth film layer 2126 and the seventh film layer 2127 are both the third coating layer. Exemplarily, 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.

[0254] 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.

[0255] In some embodiments, the manufacturing method 2 may further include: arranging a second fiber prepreg 110 on one side and / or both sides of the first fiber prepreg 210. The second fiber prepreg 110 is manufactured by an existing method. The specific introduction of the second fiber prepreg 110 can be referred to Figure 1 Related description in .

[0256] It should be understood that the second fiber prepreg 110 on the first fiber prepreg 210 should be colorless and transparent to prevent the first fiber prepreg 210 from being blocked. The second fiber prepreg 110 below the first fiber prepreg 210 can be colored or colorless and transparent, without limitation.

[0257] In some embodiments, the manufacturing method 2 may further include: spraying a first coating on a side of the plurality of coating layers (or the seventh film layer 2127 ) away from the fiber cloth 2120 .

[0258] Exemplarily, the first coating can refer to Figure 1 , Figure 6 as well as Figure 7 The first coating 130 in.

[0259] It should be understood that the first coating layer may include a first texture layer, a first bonding layer, a second texture layer, and a second bonding layer stacked in sequence. The first texture layer is an outer texture layer, which is a surface layer that can be touched by human hands, and the outer texture layer can increase the touch. The second texture layer is an inner texture layer that cannot be directly touched by human hands. The first bonding layer and the second bonding layer are transition bonding layers, the first bonding layer is connected between the first texture layer and the second texture layer, and the second bonding layer can be connected to the first fiber prepreg, so that the composite material structure formed can include from the bottom layer to the top layer: fiber cloth, multiple coating layers, second bonding layer, second texture layer, first bonding layer and first texture layer in sequence, the fiber cloth is the innermost layer, which cannot be directly touched by human hands, and the first texture layer is the outermost layer, which can be directly touched by human hands.

[0260] It should be understood that the second texture layer is combined with multiple coating layers to visually present a spatial layering effect. The superimposed spatial effect will make the resulting composite material structure or shell more beautiful.

[0261] In some embodiments, the manufacturing method 2 may further include: spraying a second coating on a side of the fiber cloth 2120 away from the multiple coating layers (or the sixth film layer 2126 ).

[0262] Exemplarily, the second coating can refer to Figure 7 The second coating 310 in.

[0263] It should be understood that when the first fiber prepreg 210 and / or the second fiber prepreg 110 is colorless and transparent, a second coating may be sprayed, and the 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 the second coating is a colored coating. It should be understood that the second coating mainly serves to shield the electronic device and can serve as a primer, for example, the base color (second coating) may be uniform red, white, black, etc.

[0264] It should be noted that the composite material structure can be manufactured by the above-mentioned method 2 for manufacturing the composite material structure. Figure 3 The composite material structure.

[0265] In another implementation, the present application provides a method 3 for manufacturing a composite material structure: obtaining a fiber cloth 2120; transferring a metal foil material to the fiber cloth 2120 through a hot stamping process to form a hot stamping layer 2128 (having a bright pattern); pre-impregnating the fiber cloth with the hot stamping layer 2128 in a resin 211 to form a first fiber prepreg 210.

[0266] The hot stamping layer 2128 may be any one of gold, silver, aluminum, indium, nickel, titanium or chromium. For example, the metal foil may be aluminum foil, gold foil, silver foil, indium foil, etc., preferably aluminum foil and indium foil.

[0267] It should be understood that in order to achieve a better brightening effect, the thickness of the hot stamping layer may be limited to between 0.01 mm and 0.02 mm.

[0268] In some embodiments, the manufacturing method 3 may include: obtaining one or more first fiber prepregs 210, and stacking the one or more first fiber prepregs 210 to form a composite material structure.

[0269] In some embodiments, the manufacturing method 3 may further include: arranging a second fiber prepreg 110 on one side and / or both sides of the first fiber prepreg 210. The second fiber prepreg 110 is manufactured by an existing method. The specific introduction of the second fiber prepreg 110 can be referred to Figure 1 Related description in .

[0270] It should be understood that the second fiber prepreg 110 on the first fiber prepreg 210 should be colorless and transparent to prevent the first fiber prepreg 210 from being blocked. The second fiber prepreg 110 below the first fiber prepreg 210 can be colored or colorless and transparent, without limitation.

[0271] In some embodiments, the manufacturing method 3 may further include: spraying a first coating on a side of the hot stamping layer 2128 away from the fiber cloth 2120 .

[0272] Exemplarily, the first coating can refer to Figure 1 , Figure 6 as well as Figure 7 The first coating 130 in.

[0273] It should be understood that the first coating layer may include a first texture layer, a first adhesive layer, a second texture layer, and a second adhesive layer stacked in sequence. The first texture layer is an outer texture layer, which is a surface layer that can be touched by human hands, and the outer texture layer can increase the touch. The second texture layer is an inner texture layer that cannot be directly touched by human hands. The first adhesive layer and the second adhesive layer are transition adhesive layers, and the first adhesive layer is connected between the first texture layer and the second texture layer. The second adhesive layer can be connected to the first fiber prepreg 210, so that the composite material structure formed can include: fiber cloth 2120, hot stamping layer 2128, second adhesive layer, second texture layer, first adhesive layer and first texture layer in sequence from the bottom layer to the top layer. The fiber cloth is the innermost layer that cannot be directly touched by human hands, and the first texture layer is the outermost layer that can be directly touched by human hands.

[0274] It should be understood that the second texture layer is combined with multiple coating layers to visually present a spatial layering effect. The superimposed spatial effect will make the resulting composite material structure or shell more beautiful.

[0275] In some embodiments, the manufacturing method 3 may further include: spraying a second coating on a side of the fiber cloth 2120 away from the first coating.

[0276] Exemplarily, the second coating can refer to Figure 7 The second coating 310 in.

[0277] It should be understood that when the first fiber prepreg 210 and / or the second fiber prepreg 110 is colorless and transparent, a second coating may be sprayed, and the second coating is located on the side of the fiber cloth 2120 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 the electronic device and can serve as a primer, for example, the base color (second coating) may be uniform red, white, black, etc.

[0278] It should be noted that the composite material structure can be manufactured by the above-mentioned method 3 for manufacturing the composite material structure. Figure 4 The composite material structure.

[0279] On the basis of the above, the present application also provides a housing, which may include: Figures 2 to 4 The composite material structure shown, that is, the shell can be made of Figures 2 to 4 The composite material structure shown in the figure is processed and manufactured. The composite material structure can be manufactured by the above-mentioned manufacturing method 1 to manufacturing method 3. Figure 6 and Figure 7 The processing method of the shell provided in the present application is exemplified.

[0280] Figure 6 It is a schematic flow chart of a shell appearance processing process provided in an embodiment of the present application.

[0281] Step 201 : obtaining a first fiber prepreg 210 and a second fiber prepreg 110 .

[0282] The number of the first fiber prepregs 210 and the second fiber prepregs 110 may be one or more. In the present embodiment, the number of the second fiber prepregs 110 is three and the number of the first fiber prepregs 210 is two for illustration.

[0283] It should be noted that the relevant description of the second fiber prepreg 110 can be referred to Figure 1 For the relevant description of the first fiber prepreg 210, please refer to Figures 2 to 5 Related description in .

[0284] Step 202 : Compression-molding the stacked first fiber prepreg 210 and the second fiber prepreg 110 to form a second fiber composite material shell material 220 .

[0285] In this step, the second fiber prepreg 110 and the first fiber prepreg 210 are stacked to form a laminate, and the number of layers of the laminate can be 2-8, preferably 2-5. The first fiber prepreg 210 can be located in any layer of the laminate, preferably in the first to third layers of the laminate.

[0286] It should be understood that the second fiber prepreg 110 on the first fiber prepreg 210 is colorless and transparent, so as to prevent the second fiber prepreg 110 on the upper layer from blocking the first fiber prepreg 210 on the lower layer, thereby preventing the brightness of the shell and the effect of spatial layering from being observed. The second fiber prepreg 110 below the first fiber prepreg 210 can be selected to be colored or colorless and transparent, and this application does not limit this.

[0287] In this step, the stacked second fiber prepreg 110 and the first fiber prepreg 210 may be heated to a softened state and then placed in a mold to form a desired shape inside the mold, for example, Figure 2 The mobile phone shell is formed and finally cooled and solidified to form a second fiber composite material shell material 220 (such as a mobile phone shell material).

[0288] For other contents in this step, please refer to step 102 and will not be described again here.

[0289] Step 203 , spraying and rubbing are performed on one side of the second fiber composite material shell material 220 to form a first coating layer 130 .

[0290] Exemplarily, the sprayed first coating 130 includes at least 4 layers, wherein the first layer texture (i.e., outer texture) is printed on the first layer, and the outer texture is used to increase the touch feeling when touched by human hands; the second layer texture (i.e., inner texture) is printed on the third layer, and the inner texture can produce an additive effect with the fiber sheet 212, and has a spatial layering effect, and the second layer texture is plated; the first and third layers are colorless and transparent, and the second and fourth layers are colored translucent or colorless and transparent. Among them, the deposit of the coating can be SiO2 / Nb2O5 or SiO2 / TiO2 repeated in more than 2 groups, and the total thickness of the deposit is between 50-400nm.

[0291] Step 204 : cutting the first fiber composite material shell material 120 and the first coating 130 to form a first shell 230 .

[0292] The specific contents of step 203 and step 204 may refer to step 103 and step 104 respectively, and will not be described again here.

[0293] In the embodiment of the present application, by adding the first fiber prepreg 210, that is, in the multi-layer laminate structure, through the composite structure of the effect fiber layer and the rubbing texture layer, the spatial effect of the fiber composite material back cover is achieved, the appearance of the fiber composite material when used in the back cover is improved, and a differentiated effect is formed.

[0294] Figure 7 It is a schematic flow chart of another shell appearance processing process provided in an embodiment of the present application.

[0295] Step 301 : obtaining a first fiber prepreg 210 and a second fiber prepreg 110 .

[0296] Step 302 : stacking the first fiber prepreg 210 and the second fiber prepreg 110 and performing compression molding to form a second fiber composite material shell material 220 .

[0297] Step 303 , spray-coating and rubbing are performed on one side of the second fiber composite material shell material 220 to form a first coating layer 130 .

[0298] The specific contents of step 301 to step 303 may refer to step 201 to step 203 respectively, and will not be described again here.

[0299] Step 304 : spray ink on the other side of the second fiber composite material shell material 220 to form a second coating layer 310 .

[0300] It should be noted that when the first coating 130 and the second fiber composite material shell material 220 are both colorless and transparent, ink can be sprayed on the side of the second fiber composite material shell material 220 away from the first coating 130 to form a second coating 310 (the second coating 310 is a colored coating), thereby playing a shielding and priming role.

[0301] The side where the first coating 130 is formed is the front side of the shell, which is visible to the user, and the side where the second coating 310 is formed is the back side of the shell, which is invisible to the user.

[0302] Step 305 , cutting the second fiber composite material shell material 220 and the first coating 130 to form a second shell 320 .

[0303] The specific contents of step 305 may refer to step 104 respectively, and will not be described again here.

[0304] In the embodiment of the present application, by adding the first fiber prepreg 210, that is, in the multi-layer laminate structure, through the composite structure of the effect layer (multiple coating layers or hot stamping layers) and the rubbing texture layer, the spatial effect of the fiber composite material back cover is achieved, and the appearance of the fiber composite material when used in the back cover is improved, forming a differentiated effect. In addition, when the first coating 130 and the second fiber composite material shell material 220 are both colorless and transparent, ink can be sprayed on the side of the second fiber composite material shell material 220 away from the first coating 130 to form a second coating 310, so as to play a role of shielding and priming.

[0305] Figure 8 It is a schematic diagram of an electronic device provided in an embodiment of the present application.

[0306] like Figure 8 As shown, the electronic device 400 provided in the present application may include a housing 410, which may be Figure 6 The first housing 230 or Figure 7 In other words, the first shell 230 or the second shell 320 includes the composite material structure provided in the embodiment of the present application, or the first shell 230 or the second shell 320 can be made of the composite material structure provided in the embodiment of the present application, and the composite material structure can be specifically as follows: Figures 2 to 5 As shown, the composite material structure includes Figures 2 to 5 A first fiber prepreg 210 is shown.

[0307] In some embodiments, the electronic device 400 further includes a transparent cover plate 420 covering the housing 410. The housing 410 and the transparent cover plate 420 cooperate to form a housing 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 arranged. The surface of the transparent cover plate 420 away from the housing 410 is the touch display surface of the electronic device 400.

[0308] It should be noted that the electronic device 400 can be an electronic device with a shell. The electronic device 400 involved in the embodiments of the present application can include mobile terminals such as mobile phones, wearable devices, smart watches, tablet computers, e-readers, notebook computers, laptop computers, mobile computers, augmented reality devices, virtual reality devices and handheld game consoles, etc.

[0309] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

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

4.

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

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

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

4.

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

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

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

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

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

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

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

4.

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

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

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

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

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

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

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

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

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

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

4.

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

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

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

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

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

Images