CN114683506A

CN114683506A - Shell assembly, preparation method thereof and electronic equipment

Info

Publication number: CN114683506A
Application number: CN202011632176.0A
Authority: CN
Inventors: 戚泽万; 李静
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2022-07-01

Abstract

The application provides a shell assembly, a preparation method thereof and an electronic device. The method for preparing the shell assembly comprises a method for preparing a plastic substrate, and the method for preparing the plastic substrate comprises the following steps: processing a master texture on the surface of an extrusion roller of an extruder; and (3) placing the first plastic particles into an extruder to be extruded to obtain the plastic substrate, and transferring the mother texture to the surface of the plastic substrate to enable the first surface of the plastic substrate to have the texture. Therefore, the texture is directly manufactured on the first surface of the plastic base material, namely the plastic base material has the texture, and compared with the method of forming the texture layer on the first surface (for example, forming the texture layer on the first surface through UV glue), the technical scheme of the application can greatly improve the wear resistance of the texture, and has better hand feeling, smoothness, fineness and better flashing visual effect.

Description

Shell assembly, preparation method thereof and electronic equipment

Technical Field

The present application relates to the field of electronic technologies, and in particular, to a housing assembly, a manufacturing method thereof, and an electronic device.

Background

In the current 5G era, optical plastic products are used as substitutes for glass products, have the advantages of high light transmittance, light weight, weather resistance, impact resistance, easiness in molding, low cost and the like, and are generally replacing glass products to be applied to electronic equipment and mobile terminals. At present, many researches are devoted to making textures on the outer surface of a plate shell so that the hand feeling, fingerprint resistance and light reflection effects of the outer surface of the plate are better, and the most common scheme is to make multi-edge three-dimensional textures on the outer surface of the plate through ink-jet printing and UV transfer printing by using UV glue. However, the texture made by UV glue has poor abrasion resistance and poor hand feel.

Therefore, research on the housing assembly is awaited.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. To this end, it is an object of the present invention to provide a method of making a housing component having a first surface textured with a better wear resistance and feel.

In one aspect of the present application, a method of making a housing assembly is provided. According to an embodiment of the application, a method of preparing a housing assembly includes a method of preparing a plastic substrate, the method of preparing the plastic substrate including: processing a master texture on the surface of an extrusion roller of an extruder; and placing the first plastic particles into the extruder to be extruded to obtain the plastic substrate, and transferring the mother texture to the surface of the plastic substrate to enable the first surface of the plastic substrate to have the texture. From this, directly make the texture at the first surface of plastic substrate, plastic substrate itself has the texture promptly, compares and forms the texture layer (for example form the texture layer at first surface through UV glue) at first surface, and the technical scheme of this application can improve the wearability of texture greatly, and feels better silky and fine and smooth, and the visual effect of scintillation is better. It should be noted that the "outer surface" refers to a surface of the plastic substrate close to the outer surface of the housing assembly.

In another aspect of the present application, a housing assembly is provided. According to an embodiment of the present application, the housing assembly includes a plastic substrate, which is prepared by the method described above. Therefore, the appearance surface of the shell assembly has the texture, the abrasion resistance of the texture is better, and the appearance of the shell assembly has a better flashing visual effect.

In yet another aspect of the present application, an electronic device is provided. According to an embodiment of the present application, the electronic device includes: the housing assembly described above; the display screen assembly is connected with the shell assembly, and an installation space is defined between the display screen assembly and the shell assembly; and the mainboard is arranged in the installation space and is electrically connected with the display screen assembly. From this, this electronic equipment's casing subassembly's outward appearance face has the texture, and the wearability preferred of texture, and casing subassembly's outward appearance has the visual effect of the flash of preferred, and then promotes electronic equipment's quality greatly. Those skilled in the art will appreciate that the electronic device has all of the features and advantages of the housing assembly previously described and will not be described in any greater detail herein.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a flow chart of one embodiment of the present application for preparing a plastic substrate;

FIG. 2 is a flow chart of another embodiment of the present application for preparing a plastic substrate;

FIG. 3 is a schematic structural diagram of a plastic substrate according to another embodiment of the present application;

FIG. 4 is a schematic structural view of a housing assembly according to yet another embodiment of the present application;

FIG. 5 is a schematic structural view of a housing assembly according to yet another embodiment of the present application;

fig. 6 is a schematic structural diagram of an electronic device in another embodiment of the present application.

Detailed Description

The scheme of the invention will be explained with reference to the examples. It will be appreciated by those skilled in the art that the following examples are illustrative of the invention only and should not be taken as limiting the scope of the invention. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products commercially available.

In one aspect of the present application, a method of making a housing assembly is provided. According to an embodiment of the present application, the method of preparing the housing assembly includes a method of preparing a plastic substrate, and referring to fig. 1, the method of preparing the plastic substrate includes:

s100: and processing a master texture on the surface of an extrusion roller of the extruder.

In some embodiments, the specific method for processing the mother texture on the surface of the extrusion roller may be processing the surface of the extrusion roller by using a laser etching apparatus, machining, sand blasting, etching, and the like, so as to obtain the mother texture. When the laser etching is adopted to prepare the mother texture, the mother texture with better accuracy can be obtained.

The depth of the mother texture is 20-30 microns, such as 20 microns, 22 microns, 24 microns, 26 microns, 28 microns or 30 microns. Therefore, the mother texture with the size can also be prepared into the texture with the same depth, so that the texture has better silky hand feeling, better wear resistance and good glittering visual effect.

Further, in some embodiments, the master texture is pyramid-shaped, and each of the pyramid-shaped master textures has a width of 80-120 micrometers, such as 80 micrometers, 85 micrometers, 90 micrometers, 95 micrometers, 100 micrometers, 105 micrometers, 110 micrometers, 115 micrometers, or 120 micrometers. Therefore, the female textures with the sizes can be prepared into textures with the same width, so that the shell assembly is smoother and finer in hand feeling, and the pyramid-shaped textures can emit a glittering visual effect like diamonds under the irradiation of sunlight.

It should be noted that, in the same plastic substrate, the depths and widths of the textures at different positions may be the same or different, as long as the depth d1 of the textures is between 20 micrometers and 30 micrometers, and the width d2 of each pyramid-shaped texture is between 80 micrometers and 120 micrometers.

S200: the first plastic particles are put into the extruder to be extruded to obtain the plastic substrate 10, and the mother texture is transferred to the surface of the plastic substrate 10, so that the first surface 11 of the plastic substrate 10 has a texture, as shown in fig. 3.

According to the embodiment of the application, the texture is directly manufactured on the first surface of the plastic base material, namely the plastic base material has the texture, and compared with the method of forming the texture layer on the first surface (for example, forming the texture layer on the first surface through UV glue), the technical scheme of the application can greatly improve the wear resistance of the texture (the steel wool friction resistance can reach more than 1500 times), and the plastic base material has better hand feeling, smoothness, fineness and better glittering visual effect; the method for preparing the textured plastic base material is beneficial to obtaining the plastic base material with more accurate texture size and higher yield. When the housing assembly is used in an electronic device, the first surface refers to a surface of the plastic substrate away from the inside of the electronic device, that is, a surface of the plastic substrate away from the display screen assembly in the electronic device. Referring to fig. 3, the plastic substrate 10 further has a second surface 12 opposite to the first surface 11, and in order to improve the bonding force between the subsequent outer light film layer and the plastic substrate 10, the second surface 12 of the plastic substrate 10 may be a smooth plane, that is, the second surface has no texture.

According to an embodiment of the present application, when the plastic substrate is a composite board, referring to fig. 2, the method for preparing the plastic substrate includes:

s210: and simultaneously extruding the second plastic particles and the first plastic particles into an extruder, and co-extruding to obtain a plastic substrate formed by the first plastic plate and the second plastic plate, wherein the texture is positioned on the surface of the first plastic plate. Therefore, the plastic substrate is a composite plate, the first plastic plate is an outer layer plate of the plastic substrate, the second plastic plate is an inner layer plate of the plastic substrate, and the texture of the first surface of the plastic substrate is located on the surface of the first plastic plate far away from the second plastic plate.

According to the embodiment of the application, during co-extrusion, the raw materials comprise: 4% -20% of the first plastic particles; 50% -90% of the second plastic particles; 4 to 30 percent of compatilizer; and 2% of an organic silicon light diffusant. Therefore, the plastic base material prepared according to the proportion has better mechanical property, and a first plastic plate and a second plastic plate with proper thickness can be obtained.

The specific material of the second plastic particles and the first plastic particles includes but is not limited to PMMA, PC, PET, and other resin materials, in some embodiments, the specific material of the first plastic particles is PMMA, and the specific material of the second plastic particles is PC; the specific material of the compatibilizer has no special requirement, and those skilled in the art can flexibly select the compatibilizer according to the actual conditions such as the specific materials of the second plastic particles and the first plastic particles, and will not be described in detail herein.

Further, the thickness ratio of the first plastic plate to the second plastic plate is 1: (7-9), for example, the thicknesses of the first plastic plate and the second plastic plate are 1:7, 1:7.5, 1:8, 1:8.5 and 1: 9. Therefore, the method is favorable for preparing the texture with proper size and is favorable for preparing the plastic base material with better mechanical property.

Further, the thickness of the plastic substrate is 0.5 to 0.64 mm, such as 0.5 mm, 0.53 mm, 0.55 mm, 0.58 mm, 0.6 mm, 0.62 mm or 0.64 mm. Therefore, the plastic substrate with the thickness can effectively meet the requirement of the shell assembly on the mechanical property of the plastic substrate.

According to an embodiment of the present application, the method of preparing a plastic substrate before extrusion molding further comprises: at least one of the first plastic particles and the second plastic particles is mixed with a colorant in advance. Therefore, the plate obtained by extruding the first plastic particles and/or the second plastic particles has a color, so that the plastic substrate has a color, the color is provided for the appearance color of the shell assembly, an ink layer does not need to be formed in the shell assembly, the transparent brightness and the fullness of the appearance color of the shell assembly can be improved, the overall thickness of the shell assembly can be reduced, the preparation process and the raw material cost can be saved, the adverse effects (such as dust points, particles, broken filaments, poor crystal points and other defects) caused by the arrangement of the ink layer can be eliminated, and the through rate of the product (at least 5 percent can be improved) and the product yield can be improved.

It will be understood by those skilled in the art that if the plastic substrate comprises only one layer of sheet material, i.e. the plastic substrate is prepared by extruding only the first plastic particles, then the first plastic particles are premixed with the colorant before extrusion; if the plastic substrate comprises a composite plate of two layers, at least one of the first plastic particles and the second plastic particles may be required to be mixed with the colorant in advance. When the plastic substrate is a composite board and the first plastic particles and the second plastic particles are mixed with the colorant in advance, the color of the colorant mixed with the first plastic particles and the second plastic particles may be the same or different, and those skilled in the art can flexibly select the colorant according to the actual design condition, which is not limited herein.

In other embodiments, at least one of the first plastic particles and the second plastic particles is mixed with colored particles in advance, the colored particles comprise carrier particles and the colorant, namely, the carrier particles are colored in advance through the colorant to obtain colored particles, then the colored particles are mixed with at least one of the first plastic particles and the second plastic particles, and then the plastic substrate is obtained through co-extrusion.

The specific material of the carrier particle has no special requirement, and the carrier particle can be compatible with the transparent plastic resin to obtain the plastic base material with excellent performance. In some embodiments, specific materials of the carrier particles include, but are not limited to, PC, PET, PMMA, and the like.

Furthermore, the amount of the colorant is not particularly limited, and those skilled in the art can flexibly select the colorant according to the depth of the desired color and the requirement on the light transmittance of the plastic substrate, and the like, without limitation.

According to embodiments of the present application, the transmittance of the plastic substrate to visible light is 83% to 95%, such as 83%, 85%, 88%, 90%, 92%, 95%. Therefore, the colored plastic substrate still has higher light transmittance, and can not shield structures such as an appearance film layer arranged on the inner surface of the plastic substrate, and further can not influence the appearance effects such as appearance texture, glossiness and the like of the shell assembly. In some embodiments, when the plastic substrate is colorless, and the colorant is not added to the plastic substrate, the transmittance of the plastic substrate to visible light may be greater than or equal to 91%.

According to an embodiment of the present application, the method of manufacturing the housing assembly (the structural schematic diagram may refer to fig. 4 and 5) further includes:

s310: silk-screen pattern layer 20 (such as silk-screen LOGO) is printed on the second surface of the plastic substrate 10, specifically: and (3) carrying out LOGO printing on the inner surface of the product by adopting a 380-mesh and 8N tension silk-screen printing plate and 70-degree frictioning, and selecting silk-screen mirror silver ink. After finishing silk-screen printing, the silk-screen printing is baked for 30min at the temperature of 80 +/-2 ℃.

According to the embodiment of this application, when the plastic substrate has the colour, because silk screen printing pattern layer is in the below of coloured plastic substrate, the colour of plastic substrate is covered to the pattern on silk screen printing pattern layer, so the pattern on silk screen printing pattern layer can demonstrate the colour with the plastic substrate homochromy in the vision, and present the technical scheme of colour through setting up the printing ink layer among the prior art, because silk screen printing pattern layer is in the top on printing ink layer, the pattern on silk screen printing pattern layer can not be covered the colour, the pattern on silk screen printing pattern layer can not present the colour on printing ink layer in the vision.

S320: forming a UV texture layer 30 by UV transfer printing on one side of the silk-screen pattern layer 20 far away from the plastic base material 10, specifically: the texture is transferred to the second surface 12 of the plastic substrate 10 by using a UV mold, wherein the UV glue is cured by ultraviolet light, the irradiation energy of the ultraviolet light is 1000-.

S330: forming a coating layer 40 on one side of the UV texture layer 30 far away from the plastic base material 10, specifically: performing PVD coating on the surface of the UV texture layer 30, wherein the specific process comprises the following steps: hanging rack → vacuumizing → material pretreatment → ion sputtering coating → air release to obtain the coating layer. Wherein, when the coating layer is of a single-layer structure and can be made of indium tin (90% indium and 10% tin), the thickness of the coating layer is 40-50 microns; when the coating layer is of a multilayer structure, the coating layer can be made of at least one of titanium oxide, silicon oxide, niobium oxide and aluminum oxide, wherein the outermost layer close to the plastic base material is made of titanium dioxide or silicon dioxide, the thickness of the outermost layer is 20-30 nanometers, the inner layer (which can comprise multiple layers) far away from the plastic base material is made of at least one of titanium oxide, silicon oxide, niobium oxide and aluminum oxide, and the thickness of the inner layer is 60-120 nanometers.

S340: forming a bottom ink layer 50 on one side of the film coating layer 40 away from the plastic substrate 10, specifically: printing ink on the surface of the film coating layer 40, and in some embodiments, printing three primary colors, namely forming three secondary cover primary layers, wherein the thickness of each secondary cover primary layer is 6-8 microns, wherein, the primary printing ceramic white primary color is pre-baked for 30min at the temperature of 80 +/-2 ℃; secondly, printing ceramic white, and pre-baking at 80 +/-2 ℃ for 30 min; and thirdly, printing titanium crystal black, and baking at 80 +/-2 ℃ for 60 min.

In addition, if the housing assembly is of a 3D structure, the housing assembly of the 3D structure can be obtained by performing high-pressure forming treatment after the formation of the bottom ink layer.

In the above steps, structures such as a UV texture layer, a film coating layer, and a bottom-covering ink layer are directly formed on the inner surface of the plastic substrate, and in other embodiments, an appearance film layer can be formed on the inner surface of the plastic substrate by a bonding method, specifically: selecting a proper membrane layer 60, sequentially forming a UV texture layer 30, a coating layer 40 and a bottom covering ink layer 50 on one surface of the membrane layer 60 to obtain an appearance membrane layer, cutting the appearance membrane layer into pieces according to the drawing specification by adopting a laser cutting process, and finally attaching the other surface of the membrane layer 60 to the inner surface 12 of the plastic base material 10 with the silk-screen pattern layer printed thereon by using a transparent adhesive layer 70, wherein the structural schematic diagram can refer to FIG. 5. Wherein, in order to ensure a better attaching effect and increase the bonding strength, a vacuum attaching machine can be adopted, the attaching temperature is normal temperature, and the attaching time is 20-40 seconds.

When the film layer 60 is adopted to attach the appearance film layer, if the housing assembly is of a 3D structure, high-pressure forming treatment can be performed after the plastic substrate is formed, so as to obtain a plastic substrate of a 3D structure, and then the film layer 60 on which the UV texture layer 30, the coating layer 40 and the bottom-covering ink layer 50 are formed is attached to the inner surface of the plastic substrate.

S350: carrying out hardening treatment on the first surface of the plastic base material, specifically: and uniformly coating the UV hardening liquid on the outer surface of the plastic base material by adopting spraying or curtain coating, and curing the hardening liquid by utilizing UV illumination to obtain a hardening film layer with the film thickness of 7-10 mu M. Wherein, the adhesive force of the hardening film layer is more than or equal to 5B by a Baige test, the hardness is more than or equal to 3H, the abrasion resistance is 0000# steel wool, the force is 1kg, a grinding head of 1cm x 1cm is used, and the hardening film layer is still intact after being rubbed for 1500 times.

S360: and carrying out numerical control cutting on the attached product through CNC machining to obtain the shell assembly. In some embodiments, the CNC engraving and milling process parameters are as follows: the main shaft rotating speed is 45000-. The process improves the product yield and ensures the processing efficiency.

In another aspect of the present application, a housing assembly is provided. According to an embodiment of the present application, the housing assembly includes a plastic substrate, which is prepared by the method described above. Therefore, the appearance surface of the shell assembly has the texture, the abrasion resistance of the texture is good, and the appearance of the shell assembly has a good flashing visual effect.

Referring to fig. 3, the plastic substrate 10 has a first surface 11 and a second surface 12 opposite to each other, and the first surface 11 has a texture. From this, the first surface of plastic substrate has the texture, and plastic substrate itself has the texture, compares and forms the texture layer (for example form the texture layer at first surface through UV glue) at first surface, and the technical scheme of this application can improve the wearability of texture greatly, and feels better silky and fine and smooth, and the visual effect of scintillation is better.

Wherein the depth d1 of the texture is 20 microns to 30 microns, such as 20 microns, 22 microns, 24 microns, 26 microns, 28 microns or 30 microns. Further, the specific shape of the texture is not particularly required, and may be a pyramid-shaped texture, a prism-shaped texture, or the like. In some embodiments, the texture is pyramid-like texture, and the width d2 of each pyramid-like texture is 80-120 microns, such as 80 microns, 85 microns, 90 microns, 95 microns, 100 microns, 105 microns, 110 microns, 115 microns, or 120 microns. Therefore, the texture with the size can enable the hand feeling of the shell assembly to be smoother and finer, and the glittering visual sense to be better.

It should be noted that, in the same plastic substrate, the depth and the width of the texture at different positions may be the same or different, as long as the depth d1 of the texture is between 20 micrometers and 30 micrometers, and the width d2 of each of the pyramid-shaped textures is between 80 micrometers and 120 micrometers.

According to the embodiment of the present application, the shape structure of the plastic substrate has no special requirement, and those skilled in the art can flexibly design according to the actual situation, for example, the plastic substrate may be a 2D structure, a 2.5D structure, or a 3D structure, which is not limited herein.

According to an embodiment of the present application, referring to fig. 4, the housing assembly may further include: a silk-screen pattern layer 20, wherein the silk-screen pattern layer 20 is arranged on the second surface 12 of the plastic substrate; a UV texture layer 30, wherein the UV texture layer 30 is disposed on a side of the silk-screen pattern layer 20 away from the plastic substrate 10 (as will be understood by those skilled in the art, in an area where the inner surface of the silk-screen pattern layer is disposed, the UV texture layer is still disposed, that is, the UV texture layer is disposed on the whole area of the inner surface); the coating layer 40 is arranged on one side, away from the plastic base material 10, of the UV texture layer 30; and the bottom-covering ink layer 50 is arranged on one side of the coating layer 40 far away from the plastic base material 10. Therefore, the shell assembly has a better appearance texture effect. According to the embodiment of this application, because silk screen printing pattern layer is in the below that coloured plastic substrate, the pattern on silk screen printing pattern layer covers the colour of plastic substrate, so the pattern on silk screen printing pattern layer can demonstrate the colour with the plastic substrate homochromy in the vision, and the technical scheme who presents the colour through setting up the printing ink layer among the prior art, because silk screen printing pattern layer is in the top on printing ink layer, the pattern on silk screen printing pattern layer can not be covered the colour, the pattern on silk screen printing pattern layer can not present the colour on printing ink layer in the vision.

Further, referring to fig. 5, the housing assembly further includes: the membrane layer 60, the membrane layer 60 is arranged on one side, close to the plastic base material 10, of the UV texture layer 30; the transparent adhesive layer 70, the transparent adhesive layer 70 is disposed on one side of the film layer 60 close to the plastic substrate 10. Therefore, in the preparation process, the UV texture layer 30, the coating layer 40 and the bottom covering ink layer 50 can be sequentially formed on one surface of the membrane layer 60 in advance, and then the other surface of the membrane layer is attached to the inner surface of the plastic base material with the silk-screen printing pattern layer through the transparent adhesive layer, so that the shell component is obtained.

In one aspect of the present application, an electronic device is provided. According to an embodiment of the present application, an electronic device includes: referring to fig. 6, the housing assembly 100 previously described; a display screen assembly 200, wherein the display screen assembly 200 is connected with the housing assembly 100, and an installation space is defined between the display screen assembly 200 and the housing assembly 100; and the mainboard is arranged in the installation space and is electrically connected with the display screen assembly. Therefore, the appearance color and the transparency of the shell assembly of the electronic equipment are good. Those skilled in the art will appreciate that the electronic device has all of the features and advantages of the housing assembly previously described and will not be redundantly described here.

The specific type of the electronic device has no special requirements, and those skilled in the art can flexibly select the electronic device according to actual requirements. In some embodiments, specific types of electronic devices described above include, but are not limited to, a cell phone (such as shown in fig. 5), iPad, notebook, kindle, game console, etc. having an electronic device.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A method of making a housing assembly comprising a method of making a plastic substrate, the method of making the plastic substrate comprising:

processing a master texture on the surface of an extrusion roller of an extruder;

and placing the first plastic particles into the extruder to be extruded to obtain the plastic substrate, and transferring the mother texture to the surface of the plastic substrate to enable the first surface of the plastic substrate to have the texture.

2. The method of claim 1, wherein the depth of the mother texture is 20-30 microns.

3. The method of claim 2, wherein the master texture is pyramid-shaped, and each of the pyramid-shaped master texture has a width of 80 to 120 μm.

4. The method of claim 1, wherein the second plastic particles and the first plastic particles are extruded into the extruder at the same time, and the plastic substrate formed by the first plastic sheet and the second plastic sheet is obtained by co-extrusion, wherein the texture is located on the surface of the first plastic sheet.

5. The method of claim 4, wherein the raw materials comprise, during co-extrusion:

4% -20% of the first plastic particles;

50% -90% of the second plastic particles;

4 to 30 percent of compatilizer; and

2% of organic silicon light diffusant.

6. The method of claim 4, wherein a thickness ratio of the first plastic sheet to the second plastic sheet is 1: (7-9).

7. The method of claim 6, wherein the plastic substrate has a thickness of 0.5 to 0.64 mm.

8. The method of any one of claims 4 to 7, further comprising: at least one of the first plastic particles and the second plastic particles is mixed with a colorant in advance.

9. The method of claim 8, wherein at least one of the first plastic particles and the second plastic particles is pre-mixed with colored particles, the colored particles comprising carrier particles and the colorant.

10. The method of claim 8, wherein the plastic substrate has a transmittance of 83% to 95% for visible light.

11. A housing component comprising a plastic substrate prepared by the method of any one of claims 1 to 10.

12. An electronic device, comprising:

the housing assembly of claim 11;

the display screen assembly is connected with the shell assembly, and an installation space is defined between the display screen assembly and the shell assembly; and

the mainboard is arranged in the installation space and electrically connected with the display screen assembly.