Housing and Its Manufacturing Method, Electronic Device

Abstract

The present application discloses a housing, a manufacturing method thereof, and an electronic device. Among them, the manufacturing method of the housing includes: providing a core-shell powder, wherein the core of the core-shell powder is a first polymer and the shell is a first inorganic powder; mixing the core-shell powder with a second polymer and a second inorganic powder, and performing injection molding to obtain the housing. By the above method, the present application can provide technical support for improving the performance and ceramic texture of the housing.

Description

Technical Field

[0001] This application relates to the technical field of shells, and particularly to a shell, a manufacturing method thereof, and an electronic device. Background Art

[0002] Currently, electronic devices with outer structural parts having a ceramic texture are increasingly favored by users. However, due to reasons such as the high density of ceramics and the difficulty in forming, more and more manufacturers have started to use composite materials of ceramics and other materials as the outer structural parts of electronic products, such as the outer shell.

[0003] However, the currently used composite materials of ceramics and other materials cannot meet the user's requirements for the performance and appearance of the product. Summary of the Invention

[0004] The main technical problem to be solved by this application is to provide a shell, a manufacturing method thereof, and an electronic device, which can provide technical support for improving the performance and ceramic texture of the shell.

[0005] To solve the above technical problem, one technical solution adopted by this application is: to provide a manufacturing method of a shell, the manufacturing method of the shell includes: providing core-shell powder, wherein the core of the core-shell powder is a first polymer, and the shell is a first inorganic powder; mixing the core-shell powder with a second polymer and a second inorganic powder, and performing injection molding to obtain the shell.

[0006] To solve the above technical problem, another technical solution adopted by this application is: to provide a shell, the material of the shell is a ceramic composite material; the ceramic composite material includes a plurality of toughened micro-regions, each of the toughened micro-regions includes a core-shell structure, and a first polymer wrapped around the periphery of the core-shell structure, the core of the core-shell structure is the first polymer, and the shell is a first inorganic powder; the plurality of toughened micro-regions are dispersed in a second polymer and a second inorganic powder.

[0007] To solve the above technical problem, another technical solution adopted by this application is: to provide an electronic device, the electronic device includes a shell manufactured by the manufacturing method of the shell as described above or includes the shell as described above.

[0008] The beneficial effects of this application are as follows: Different from the prior art, this application provides a manufacturing method for a housing, which includes: providing core-shell powder; mixing the core-shell powder with a second polymer and a second inorganic powder, and performing injection molding to obtain the housing. In the above method, the core-shell powder has a core-shell structure, where the inner core is a first polymer and the outer shell is a first inorganic powder. In this way, due to the core-shell structure of the core-shell powder, the injection molding fluidity can be optimized during injection molding, the addition amount of the inorganic powder can be increased, thereby providing technical support for improving the performance and ceramic texture of the manufactured housing. Description of the Drawings

[0009] To more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. Among them:

[0010] Figure 1 is a schematic structural diagram of an embodiment of an electronic device of this application;

[0011] Figure 2 is a schematic structural diagram of an embodiment of the housing of this application;

[0012] Figure 3 is a schematic flowchart of an embodiment of the manufacturing method of the housing of this application;

[0013] Figure 4 is Figure 3 the flowchart of step S20 in;

[0014] Figure 5 is Figure 4 the flowchart of step S24 in;

[0015] Figure 6 is a manufacturing flowchart of the core-shell powder in an embodiment of the manufacturing method of the housing of this application;

[0016] Figure 7 is a schematic flowchart of another embodiment of the manufacturing method of the housing of this application;

[0017] Figure 8 is a schematic flowchart of yet another embodiment of the manufacturing method of the housing of this application;

[0018] Figure 9 is a variation diagram of the core-shell powder in an embodiment of the manufacturing method of the housing of this application. Detailed Embodiments

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0020] The present application provides an electronic device. Please refer to Figure 1 , in one embodiment, the electronic device includes a housing assembly 100 and internal components. Among them, the housing assembly 100 defines an accommodation space, and the internal components can be disposed in the accommodation space. The housing assembly 100 can play a role in protecting the internal components (for example, the main board, battery, etc.).

[0021] Specifically, the electronic device can be a mobile phone, a tablet computer, a laptop computer, a smart bracelet, a smart watch, an earphone, etc. The housing assembly 100 can be the front shell, the frame, the back cover, etc. of the electronic device, which is not limited here.

[0022] Please refer to Figure 2 together. In one embodiment, the housing assembly 100 can include a housing 10 and an appearance layer 20 disposed on the housing 10. Specifically, the appearance layer 20 can be at least one of a color layer that can make the housing present a certain color, a reflection layer that reflects incident light to make the housing present a high-brightness effect, a texture pattern layer that can present a texture effect, etc., and can be specifically selected according to actual needs, which is not limited here.

[0023] Of course, in some embodiments, the housing assembly 100 may also only include the housing 10 without including the above-mentioned appearance layer 20, which is not specifically limited here.

[0024] In one embodiment, the housing 10 can be manufactured by the following method. Please refer to Figure 3 , and the manufacturing method can include:

[0025] Step S20: Provide core-shell powder.

[0026] The core-shell powder can have a spherical or quasi-spherical core-shell structure. Among them, the inner core can be a first polymer, and the outer shell can be a first inorganic powder.

[0027] Among them, the first polymer can be a high molecular polymer with certain toughness and elasticity and / or its prepolymer, such as a first resin with high toughness and high elasticity and / or its prepolymer. Specifically, the first resin can be at least one of styrenic block copolymers (SBS), acrylonitrile butadiene styrene copolymers (ABS), ethylene propylene rubber (EPR), and polyolefin thermoplastic elastomer (POE), etc.

[0028] The first inorganic powder can be a ceramic powder, such as at least one of zirconia, silica, and alumina, etc.

[0029] In the core-shell powder, the first inorganic powders are combined with each other to form a shell that is larger in particle size than the first inorganic powder itself and wraps around the periphery of the first polymer.

[0030] Among them, the core-shell powder can be obtained by purchase or can also be prepared. Specifically, in one embodiment, please refer to Figure 4 , step S20 may include:

[0031] Step S22: Prepare a first polymer solution and a first inorganic powder slurry;

[0032] Among them, the first polymer solution can be a solution obtained by dissolving at least one of the first polymers such as SBS, ABS, EPR, and POE in an organic solvent. The organic solvent can be at least one of acetone, tetrahydrofuran, dimethyl sulfoxide, and chloroform, etc.

[0033] Specifically, when preparing the first polymer solution, the above-mentioned first polymer can be added to a condensing reflux reactor equipped with the above-mentioned organic solvent at 20 - 100 °C for dissolution, so as to prepare a solution with a mass percentage of the first polymer of 50 - 70%.

[0034] Among them, the preparation temperature can specifically be 20 °C, 40 °C, 60 °C, 80 °C, 100 °C, etc.; in the first polymer solution, the mass percentage of the first polymer can specifically be 50%, 55%, 60%, 65%, 70%, etc., and no specific limitation is made here.

[0035] Furthermore, the first inorganic powder slurry can be a mixture formed by dispersing the first inorganic powder in water or an alcohol-water medium, etc.

[0036] Among them, the first inorganic powder can be spherical, quasi-spherical or irregular in shape, etc., and no specific limitation is made here. It should be noted that the particle size of the first inorganic powder can be nanoscale. Specifically, its median diameter (i.e., D50) can be 100 - 500 nm, such as 100 nm, 200 nm, 300 nm, 400 nm, 500 nm, etc.

[0037] Before preparing the first inorganic powder slurry, the powder raw material can be first subjected to sand grinding treatment to obtain the first inorganic powder that meets the above particle size range.

[0038] Specifically, a powder raw material slurry can be obtained by mixing a powder raw material of at least one of zirconia, silica, alumina, etc. with a water / alcohol-water medium; or a dispersant of 0.3 - 3% of the mass of the powder raw material can be further added, such as at least one of sodium dodecyl sulfate, sodium hexametaphosphate, sodium benzoate, polyvinyl alcohol, etc., so that the powder raw material can be stably dispersed in the water / alcohol-water medium.

[0039] Among them, the sand grinding zirconia beads selected for the sand grinding treatment can have a single particle size or can be a mixture of sand grinding zirconia beads with multiple particle sizes. Specifically, its particle size can be 0.5 mm - 10 mm, such as 0.5 mm, 1 mm, 2 mm, 5 mm, 10 mm, etc. When performing the sand grinding treatment, the sand grinding time can be 2 - 10 h, specifically such as 2 h, 4 h, 6 h, 8 h, 10 h, etc.; the sand grinding speed can be 500 - 2000 r / min, specifically such as 500 r / min, 1000 r / min, 1500 r / min, 2000 r / min, etc. Specifically, appropriate sand grinding process parameters can be determined according to the morphology, particle size, etc. of the first inorganic powder to be obtained.

[0040] After the sand grinding treatment, a drying treatment can be further performed. For example, flash drying can be used to obtain the corresponding first inorganic powder. Among them, the temperature of the flash drying can be 100 - 280 °C, such as 100 °C, 150 °C, 200 °C, 240 °C, 280 °C, etc., and the flash drying rate can be 2 - 5 kg / h, such as 2 kg / h, 3 kg / h, 4 kg / h, 5 kg / h, etc.

[0041] After obtaining the above first inorganic powder, it can be added to water or an alcohol-water medium containing a surfactant (such as a reactive surfactant) and a catalyst (such as a water-based peroxide) to obtain the first inorganic powder slurry.

[0042] Specifically, when preparing the first inorganic powder slurry, the first inorganic powder can be added to the above mixture at a rotation speed of 100 - 1000 r / min. This rotation speed can specifically be 100 r / min, 200 r / min, 400 r / min, 600 r / min, 800 r / min, 1000 r / min, etc.

[0043] The above reactive surfactant can be at least one of epoxy olefin surfactants, maleic acid diester surfactants, etc., and its mass can be 1%-3% of the mass of the first inorganic powder, specifically such as 1%, 2%, 3%, etc.; the aqueous peroxide can be at least one of ammonium persulfate, potassium persulfate, etc., and its mass can be 1%-3% of the surfactant, specifically such as 1%, 2%, 3%, etc. The mass percentage of the first inorganic powder in the finally obtained first inorganic powder slurry can be 30%-60%, specifically such as 30%, 40%, 50%, 60%, etc.

[0044] Step S24: Add the first polymer solution to the first inorganic powder slurry and perform stirring treatment so that the first polymer solution is dispersed to form first polymer droplets, and the first inorganic powder combines to form a shell to wrap the first polymer droplets, forming an emulsion mixture;

[0045] It should be noted that the aforementioned core-shell powder is formed by the first inorganic powder wrapping the first polymer. When preparing the core-shell powder, the first inorganic powder slurry and the first polymer solution can be mixed together, and the first inorganic powder slurry is made to wrap the first polymer solution.

[0046] Specifically, please refer to Figure 5 and Figure 6 , step S24 may include:

[0047] Step S242: Add the first polymer solution to the first inorganic powder slurry and stir to disperse the first polymer solution to form first polymer droplets, and make the first inorganic powder slurry wrap around the periphery of the first polymer droplets to obtain an initial state of the emulsion mixture.

[0048] Specifically, at room temperature, the first polymer solution can be uniformly added to the first inorganic powder slurry at a feeding rate of 3-5 kg / h, and stirred while adding. The stirring rate can be 300-800 r / min, specifically such as 300 r / min, 400 r / min, 600 r / min, 800 r / min, etc. Among them, the added mass of the first polymer solution can account for 30%-70% of the total mass of the finally obtained initial state of the emulsion mixture, specifically such as 30%, 40%, 50%, 60%, 70%, etc.

[0049] After the first polymer solution is completely added, increase the stirring rate to 1000 - 3000 r / min and continue stirring for 1 - 3 h until the mixture of the first polymer solution and the first inorganic powder slurry forms a stable initial emulsion mixture with uniform dispersion. Herein, the stirring rate can specifically be 1000 r / min, 1500 r / min, 2000 r / min, 2500 r / min, 3000 r / min, etc.; the stirring time can specifically be 1 h, 2 h, 3 h, etc.

[0050] It should be noted that in the water / alcohol - water medium, the first polymer solution and the first inorganic powder slurry are immiscible and form two phases. The powder with the above - mentioned reactive surfactant on its surface disperses towards the two - phase interface, and under the action of stirring, the first polymer solution is dispersed to form emulsion droplets stabilized by the first inorganic powder at the interface, and finally promotes the formation of a stable emulsion in the whole system.

[0051] Step S244: Heat the initial emulsion mixture and stir under the heating condition so that the reactive surfactant polymerizes under the action of the catalyst, and the first inorganic powders are combined together to form a shell, thereby obtaining the emulsion mixture.

[0052] It should be noted that in step S242, the first inorganic powders are stably dispersed at the two - phase interface and are initially wrapped around the periphery of the first polymer droplets. In order to further connect the first inorganic powders together to form a stable shell, in this step, the above - mentioned initial emulsion mixture is further heated to 50 - 90 °C and stirred at a stirring rate of 300 - 800 r / min for 2 - 6 h, so that the reactive surfactant linked to the surface of the first inorganic powders wrapping the first polymer solution undergoes a polymerization reaction under the catalysis of peroxide, thereby combining the first inorganic powders on the surface of the first polymer droplets to form a stable core - shell structure, and thus obtaining the emulsion mixture.

[0053] Among them, the heating temperature can specifically be 50 °C, 60 °C, 70 °C, 80 °C, 90 °C, etc., the stirring rate can specifically be 300 r / min, 500 r / min, 600 r / min, 800 r / min, etc., and the reaction time can specifically be 2 h, 4 h, 6 h, etc.

[0054] Step S26: Perform a drying treatment on the emulsion mixture to obtain the core - shell powder.

[0055] The emulsion mixture obtained in the above step S24 contains a solvent, so it needs to be further dried.

[0056] Specifically, the emulsion mixture obtained after the reaction can be subjected to a low - temperature vacuum drying treatment to obtain the dried core - shell powder.

[0057] Specifically, nano-sized first inorganic powders with a median diameter D50 of 100 - 500 nm can combine to form a micron-sized spherical shell with a median diameter D50 of 20 - 50 μm (such as 20 μm, 30 μm, 40 μm, 50 μm), and the spherical shell wraps the first polymer core. Among them, the mass percentage of the first inorganic powder in the core-shell structure is 60% - 90%, and specifically it can be 60%, 70%, 80%, 90%, etc.

[0058] Step S40: Mix the core-shell powder with a second polymer and a second inorganic powder, and perform injection molding to obtain a shell.

[0059] Among them, the second polymer can be a high molecular polymer with certain strength and hardness. For example, it can be a second resin with lower toughness than the first resin, and specifically it can be at least one of polycarbonate (PC), polyphenylene sulfide (PPS), polyamide (PA for short), and polybutylene terephthalate (PBT).

[0060] The second inorganic powder can be the same as or different from the first inorganic powder. In an application scenario, the second inorganic powder can be spherical, quasi-spherical, or irregular in shape, etc., and no specific limitation is made here. The median diameter D50 of the second inorganic powder can be 100 nm - 5 μm, such as 100 nm, 500 nm, 1 μm, 3 μm, 5 μm, etc.

[0061] Among them, the powder raw material can be subjected to sanding treatment to obtain the second inorganic powder that meets the above particle size range.

[0062] Specifically, a powder raw material slurry can be obtained by mixing at least one of zirconia, silica, alumina, etc. with a water / alcohol-water medium; or a dispersant with a mass of 0.3 - 3% of the powder raw material, such as at least one of sodium dodecyl sulfate, sodium hexametaphosphate, sodium benzoate, and polyvinyl alcohol, can be further added to enable the powder raw material to be stably dispersed in the water / alcohol-water medium.

[0063] Among them, the zirconium beads used for sanding treatment can have a single particle size or be a mixture of zirconium beads with multiple particle sizes. Specifically, the particle size can be 0.5 - 10 mm, such as 0.5 mm, 1 mm, 2 mm, 5 mm, 10 mm, etc. When performing sanding treatment, the sanding time can be 2 - 10 h, such as 2 h, 4 h, 6 h, 8 h, 10 h, etc.; the sanding speed can be 500 - 2000 r / min, such as 500 r / min, 1000 r / min, 1500 r / min, 2000 r / min, etc. Specifically, appropriate sanding process parameters can be determined according to the morphology, particle size, etc. of the second inorganic powder to be obtained.

[0064] After sanding treatment, drying treatment can be further carried out, such as flash drying can be used to obtain the corresponding second inorganic powder. Among them, the temperature of flash drying can be 100 - 280 °C, such as 100 °C, 150 °C, 200 °C, 240 °C, 280 °C, etc., and the flash drying rate can be 2 - 5 kg / h, such as 2 kg / h, 3 kg / h, 4 kg / h, 5 kg / h, etc.

[0065] It can be understood that the first inorganic powder and the second inorganic powder can be formed through the same process. For example, inorganic powder with a median diameter D50 of 100 nm - 5 μm can be prepared at one time. Among them, the first inorganic powder can select the inorganic powder with a median diameter D50 in the range of 100 - 500 nm among the prepared inorganic powders, and the second inorganic powder can select the remaining inorganic powders among the prepared inorganic powders. Of course, the two can also be prepared separately through different processes, which is not specifically limited here.

[0066] In addition, when mixing materials, at least one of the additives such as leveling agent, cosolvent, antioxidant, etc. can be further mixed in. The core - shell powder, the second polymer, the second inorganic powder and the additives are mixed together, and then ball - milled and blended evenly.

[0067] Among them, the mass percentage content of the core - shell powder can be 20% - 80%, specifically 20%, 40%, 60%, 80%, etc., the mass percentage content of the second inorganic powder can be 30% - 60%, specifically 30%, 40%, 50%, 60%, etc., the mass percentage content of the first polymer can be 10% - 50%, specifically 10%, 30%, 50%, etc., and the mass percentage content of the additive can be 0.1% - 1%, specifically 0.1%, 0.4%, 0.8%, 1%, etc.

[0068] Furthermore, after the mixing is completed, the blended ingredients can be further added to a negative - pressure internal mixer for internal mixing and granulation. Among them, the internal mixing temperature can be 150 - 350 °C, the internal mixing air pressure can be less than 0.01 MPa, or nitrogen protection can be carried out throughout the process, and the internal mixing time can be 30 - 300 min.

[0069] After the internal mixing is completed, the material after internal mixing and granulation can be injection-molded according to the shape of the housing. Among them, the injection temperature can be 150-350 °C, the injection speed can be 50%-98%, and the injection pressure can be 80-160 Mpa.

[0070] It should be noted that in the above method, the core-shell powder has a core-shell structure, where the inner core is the first polymer and the outer shell is the first inorganic powder. In this way, the first inorganic powder with a nanoscale particle size can be combined into a spherical outer shell of the core-shell powder with a micron-scale particle size, thereby greatly optimizing the injection molding fluidity. Since the injection molding fluidity is optimized, the addition amount of the second inorganic powder can be increased, so as to increase the total amount of the first inorganic powder and the second inorganic powder in the housing, and further improve the strength of the housing, and also make the housing have a better ceramic texture.

[0071] Specifically, the total amount of the first inorganic powder and the second inorganic powder can be 50%-90%, such as 50%, 60%, 70%, 80%, 90%, etc., and more than 80% in one application scenario.

[0072] Furthermore, please refer to Figure 7 , in one embodiment, after the injection molding and before obtaining the housing, the above method for manufacturing the housing may further include:

[0073] Step S60: Perform warm isostatic pressing on the material after injection molding to extrude part of the first polymer in the core-shell powder to the outside of the outer shell and wrap it around the periphery of the outer shell.

[0074] Among them, the temperature for performing warm isostatic pressing can be higher than the glass transition temperature of the first polymer, such as 80-200 °C, and the pressure is 150-500 MPa. Specifically, the temperature for warm isostatic pressing can be 80 °C, 100 °C, 150 °C, 200 °C, etc.; the pressure can be 150 MPa, 200 MPa, 300 MPa, 400 MPa, 500 MPa, etc.

[0075] It should be noted that under the temperature condition higher than the glass transition temperature of the first polymer, performing high-pressure treatment helps to eliminate pores, defects, etc. in the injection-molded blank obtained after injection molding, thereby enhancing the density of the system, compressing or eliminating the gaps between inorganic powders (the first inorganic powder, the second inorganic powder), and improving the system strength; in addition, this treatment condition can also cause the core-shell powder to deform and the outer shell to rupture, and the highly tough first polymer wrapped therein changes to a flowing state and is extruded out and reversely wrapped on the surface layer of the first inorganic powder outer shell, and then linked into a continuous phase, thereby forming a highly tough interfacial layer and enhancing the toughness of the housing.

[0076] Further, please refer to Figure 8 , in an embodiment, after warm isostatic pressing treatment and before obtaining the housing, the manufacturing method of the housing may further include:

[0077] Step S80: Heat-treat the material after warm isostatic pressing treatment so that the core-shell powder reacts with the second polymer and binds together.

[0078] Among them, the temperature for heat treatment can be 100 - 350 °C, specifically such as 100 °C, 200 °C, 300 °C, 350 °C, and the heat treatment time can be 6 - 36 h, specifically such as 6 h, 12 h, 18 h, 24 h, 30 h, 36 h, etc. In an application scenario, the heat treatment temperature is 310 °C and the heat treatment time is 24 h.

[0079] It should be noted that long-time high-temperature treatment can promote the reaction between the second polymer and the broken core-shell powder, improving the comprehensive performance of the composite system. Specifically, at high temperature, the polymer can undergo a chain extension reaction under the action of a catalyst / oxygen to increase the molecular chain, thereby improving the toughness of the polymer. At the same time, the polymers with long molecular chains can form a stronger and tougher network structure, enhancing the strength and toughness of the housing. Further, a graft reaction and molecular chain entanglement and incorporation may occur between the second polymer and the highly tough first polymer at high temperature, resulting in a closer combination, which is helpful for the transfer of impact energy and the dissipation of impact energy in the system, further enhancing the strength and toughness of the housing, making the obtained housing not easily broken when dropped.

[0080] It should be pointed out that when the first polymer is a prepolymer of the first resin or contains a prepolymer of the first resin, due to the smaller molecular chain segments of the prepolymer and stronger mobility, it can better interact with the second polymer and improve the binding force. At the same time, the prepolymer has reactive end groups, which can chemically react with the active sites on the second polymer to generate chemical links to achieve stronger binding, forming a wider and denser buffer interface layer, further enhancing the toughness and strength of the housing.

[0081] It should be further noted that through the manufacturing method of the housing described above, a plurality of toughness micro-regions formed by the first polymer and the broken core-shell powder wrapped by it can be formed inside the housing, and the toughness of the toughness micro-regions is higher than that of other regions of the housing, thereby enhancing the toughness of the housing.

[0082] Further, in some embodiments, after heat treatment, the housing blank can be further polished. Specifically, the surface of the housing blank can be ground and polished, and the surface roughness after fine polishing can reach Ra 0.02 - 0.08, which can reach the polishing level of ceramics.

[0083] It should be noted that due to the use of the above core-shell powder, the filling amount of the inorganic powder in the shell can be increased, which helps the shell achieve a high-gloss ceramic texture. Specifically, it is measured to be 160-260 gloss units under a 20° glossmeter, 135-180 gloss units under a 60° glossmeter, and 90-120 gloss units under an 80° glossmeter. In addition, the surface hardness of the polished shell is not less than 6H, so it also has good wear resistance.

[0084] Furthermore, the present application also provides a shell, and the material of the shell is a ceramic composite material.

[0085] Specifically, the ceramic composite material may include a plurality of toughened micro-regions, each toughened micro-region includes a core-shell structure, and a first polymer wrapped around the periphery of the core-shell structure. The core of the core-shell structure is the first polymer, and the shell is the first inorganic powder. The plurality of toughened micro-regions are dispersed in the second polymer and the second inorganic powder.

[0086] Specifically, the toughness of the first polymer is higher than that of the second polymer. It should be noted that the core-shell structure is different from the core-shell structure of the core-shell powder in the manufacturing method of the foregoing shell. The core-shell structure is the core-shell structure formed after the outer shell of the first inorganic powder of the foregoing core-shell powder ruptures and part of the internal first polymer is extruded. The second polymer is in a long-chain entangled network structure and is connected and fused with the first polymer to form a strong interface of the toughened micro-region, so that the shell has high toughness and high strength.

[0087] In addition, the mass percentage content of the inorganic powder (including the first inorganic powder and the second inorganic powder) can be 50%-90%, specifically such as 50%, 60%, 70%, 80%, 90%, etc., and is more than 80% in one application scenario. That is, the content of the inorganic powder is relatively high, so on the one hand, it can improve the strength of the shell, and on the other hand, it can make the shell have a better ceramic texture.

[0088] It should be noted that the first polymer, the second polymer, the first inorganic powder, the second inorganic powder, etc. in this embodiment can be the same as those in the foregoing shell and the manufacturing method of the shell. For relevant detailed content, please refer to the above embodiments and will not be elaborated here. In addition, the shell can be manufactured by the foregoing manufacturing method of the shell, or can be manufactured by other methods, which are not specifically limited here.

[0089] The above-mentioned housing of the present application will be described below by comparing the housings made by different methods. Among them, housings 1-4 are all made by the above-mentioned housing manufacturing method of the present application. During the manufacturing process, the addition amounts of the core-shell powder, the second inorganic powder, and the second polymer in each housing are the same. Among them, the core-shell powder is 30% in all cases, the second inorganic powder is 57% in all cases, and the second polymer is 13% in all cases. The difference lies in that different types of the first polymer are used in the core-shell powder of housings 1-4. Housing 5 is a housing made by injection molding a ceramic composite material obtained from PPS and zirconia inorganic powder, where the resin content is 25% and the inorganic powder content is 75%. Housing 6 is a zirconia ceramic housing. The specific components and test data are shown in Table 1 below:

[0090] Table 1 Relevant data of housings 1-6

[0091]

[0092]

[0093] Among them, the pencil hardness test is carried out in accordance with GB / T 6739-1996. The test method for the falling ball impact test is as follows: The sample is a flat sheet with dimensions of 150*73*0.8 mm. The flat sheet sample is supported on a fixture, where each side has a 3-mm support and the middle part is suspended. Then, a 32-g stainless steel ball is freely dropped from a certain height onto the surface of the sample to be tested. There are a total of five points at the four corners and the center of the sample, and each point is tested 5 times until it breaks. The glossmeter used to measure the glossiness is Konica Minolta Multi Gloss S268A. The test for the elongation at break is carried out in accordance with GB-T 1040-92.

[0094] In addition, for other hardness and glossiness related aspects in the present application, they are also measured in the above-mentioned manner.

[0095] It should be further noted that housings 1-6 respectively refer to six types of housings. The data in Table 1 above are the data of the corresponding types of housings, rather than limiting six specific housings. The content of the inorganic powder in housings 1-4 can be greater than 80%, while the content of the inorganic powder in housing 5 can only reach 75%.

[0096] As can be seen from the above table, the hardness of the housings 1-4 is relatively high and close to that of zirconia ceramics, while the hardness of the housing 5 is relatively low, indicating that the wear resistance of the housings 1-4 and the housing 6 is better. For the ball-drop impact test, the ball-drop heights of the housings 1-4 are relatively high, while those of the housings 5 and 6 are much lower than those of the housings 1-4, indicating that the impact resistance of the housings 1-4 is stronger. When the housing is impacted, it can quickly disperse and consume the force generated by the impact, so the housing is more drop-resistant. In addition, from the glossiness at various angles, it can also be seen that the glossiness of the housings 1-4 and the housing 6 is relatively high, and the glossiness of the housings 1-4 is relatively close to that of the housing 6, while the glossiness of the housing 5 is relatively low. In addition, the elongation at break of the housings 1-4 is also significantly higher than that of the housings 5-6, indicating that the housings 1-4 have higher toughness than the housings 5-6.

[0097] Therefore, the above data show that the housing produced by the manufacturing method of the housing in the present application is good in terms of hardness, impact resistance, glossiness and toughness. That is to say, the texture of the housing is closer to that of the ceramic housing, but the comprehensive performance is better than that of the ceramic housing, such as better wear resistance, more drop-resistant and not easily broken, etc., which can meet the user's usage requirements.

[0098] The above is only the implementation mode of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of the present application by the same token.

Claims

1. A manufacturing method of a housing, characterized in that, Comprising: Providing a core-shell powder, wherein the core of the core-shell powder is a first polymer and the shell is a first inorganic powder; Mixing the core-shell powder with a second polymer and a second inorganic powder, and performing injection molding to obtain the housing; Wherein, the first polymer is at least one of a first resin and a prepolymer of the first resin, the second polymer is a second resin, and the toughness of the first resin is higher than that of the second resin; The first resin is at least one of styrene-butadiene-styrene block copolymer, acrylonitrile-butadiene-styrene copolymer, ethylene-propylene rubber and polyolefin thermoplastic elastomer; The second resin is at least one of polycarbonate, polyphenylene sulfide, polyamide and polybutylene terephthalate; The first inorganic powder is a ceramic powder, and the ceramic powder is at least one of zirconia, silica and alumina.

2. The manufacturing method according to claim 1, characterized in that, After the injection molding and before obtaining the housing, the manufacturing method further includes: Performing warm isostatic pressing on the material after the injection molding, so that a part of the first polymer in the core-shell powder is extruded to the outside of the shell and wrapped around the periphery of the shell.

3. The manufacturing method according to claim 2, characterized in that, The temperature of the warm isostatic pressing is greater than the glass transition temperature of the first polymer, and the pressure is 150-500 MPa.

4. The manufacturing method according to claim 2, wherein After the warm isostatic pressing and before obtaining the housing, the manufacturing method further includes: Performing heat treatment on the material after the warm isostatic pressing, so that the core-shell powder reacts with the second polymer and binds together.

5. The manufacturing method according to claim 1, characterized in that, The step of providing the core-shell powder includes: Preparing a first polymer solution and a first inorganic powder slurry; Adding the first polymer solution to the first inorganic powder slurry, and performing stirring treatment, so that the first polymer solution is dispersed to form first polymer droplets, and the first inorganic powder binds to form the shell to wrap the first polymer droplets, forming an emulsion mixture; Performing drying treatment on the emulsion mixture to obtain the core-shell powder.

6. The manufacturing method according to claim 5, wherein, The first inorganic powder slurry contains the first inorganic powder, a surfactant and a catalyst; The step of adding the first polymer solution to the first inorganic powder slurry to form an emulsion mixture includes: Adding the first polymer solution to the first inorganic powder slurry, and performing stirring, so that the first polymer solution is dispersed to form first polymer droplets, and the first inorganic powder slurry wraps around the periphery of the first polymer droplets, obtaining an initial state of the emulsion mixture; Heating the initial state of the emulsion mixture, and performing stirring under the heating condition, so that the surfactant polymerizes under the action of the catalyst, and the first inorganic powder binds together to form the shell, thereby obtaining the emulsion mixture.

7. The manufacturing method according to claim 1, characterized in that, The median diameter of the first inorganic powder is 100-500 nm, and the median diameter of the core-shell powder is 20-50 μm.

8. The manufacturing method according to claim 7, characterized in that, The shape of the core-shell powder is spherical or quasi-spherical.

9. The manufacturing method according to claim 1, wherein The sum of the mass percentage contents of the first inorganic powder and the second inorganic powder is 50%-90%.

10. A housing, characterized in that, The material of the housing is a ceramic composite material; The ceramic composite material includes a plurality of ductile micro-regions, each of the ductile micro-regions includes a core-shell structure, and a first polymer wrapped around the periphery of the core-shell structure. The core of the core-shell structure is the first polymer, and the shell is a first inorganic powder; The plurality of ductile micro-regions are dispersed in a second polymer and a second inorganic powder; Wherein, the first polymer is at least one of a first resin and a prepolymer of the first resin, and the second polymer is a second resin. Among them, the ductility of the first resin is higher than that of the second resin; The first resin is at least one of styrene-butadiene-styrene block copolymer, acrylonitrile-butadiene-styrene copolymer, ethylene-propylene rubber, and polyolefin thermoplastic elastomer; The second resin is at least one of polycarbonate, polyphenylene sulfide, polyamide, and polybutylene terephthalate; The first inorganic powder is a ceramic powder, and the ceramic powder is at least one of zirconia, silica, and alumina.

11. The housing according to claim 10, characterized in that, The ductility of the ductile micro-region is higher than that of other regions of the ceramic composite material, and the first polymer is connected to the second polymer.

12. An electronic device, characterized in that, The electronic device includes a housing manufactured by the manufacturing method according to any one of claims 1-9 or includes a housing according to any one of claims 10-11.

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