CN113895129A

CN113895129A - Shell, manufacturing method thereof and electronic equipment

Info

Publication number: CN113895129A
Application number: CN202111045917.XA
Authority: CN
Inventors: 高亮
Original assignee: Realme Mobile Telecommunications Shenzhen Co Ltd
Current assignee: Realme Mobile Telecommunications Shenzhen Co Ltd
Priority date: 2021-09-07
Filing date: 2021-09-07
Publication date: 2022-01-07
Also published as: WO2023036086A1

Abstract

The application provides a shell, a manufacturing method thereof and electronic equipment, wherein the shell comprises a substrate and an appearance membrane, and the appearance membrane is arranged on one side of the substrate; the appearance membrane comprises a substrate layer, a color layer and a texture layer, wherein the substrate layer is made of polyurethane; the color layer is arranged on the base material layer; the texture layer is arranged on one side, away from the base material layer, of the color layer; wherein, the texture layer is made of transparent polyurethane. According to the shell provided by the embodiment of the application, the color layer is formed on the base material layer made of polyurethane, so that the shell can achieve rich color or gradient color pattern effects; meanwhile, a texture layer is formed on the color layer and is made of transparent polyurethane, so that patterns on the color layer can be displayed, and the shell can realize abundant color textures or gradient color texture pattern effects by matching with the textures on the texture layer.

Description

Shell, manufacturing method thereof and electronic equipment

Technical Field

The application relates to the technical field of electronic equipment, in particular to an electronic equipment shell, a manufacturing method thereof and electronic equipment.

Background

With the continuous development of electronic devices, the electronic devices have become indispensable entertainment tools and social tools in people's daily life, and people's demand for the electronic devices is also higher and higher. Taking a mobile phone as an example, the backshells of some mobile phones can be decorated correspondingly to improve the appearance effect of the mobile phone and bring good visual experience to users. For example, a film with a leather-like appearance is formed on the rear cover of a mobile phone to provide a balanced and fine texture effect. However, the rear shell of the existing appearance membrane with the leather-like appearance has single color, which is not favorable for the appearance of the product.

Disclosure of Invention

One aspect of the embodiments of the present application provides a housing for an electronic device, where the housing includes a substrate and an appearance membrane, and the appearance membrane is disposed on one side of the substrate; the appearance membrane comprises a substrate layer, a color layer and a texture layer, wherein the substrate layer is made of polyurethane; the color layer is arranged on the base material layer; the texture layer is arranged on one side, away from the base material layer, of the color layer; wherein, the texture layer is made of transparent polyurethane.

Another aspect of the embodiments of the present application provides a method for manufacturing a housing, where the method includes: providing a substrate layer, wherein the substrate layer is made of polyurethane; forming a color layer on the substrate layer; forming a texture layer on one side, away from the base material layer, of the color layer to form an appearance membrane; providing a substrate, and arranging the appearance membrane on one side of the substrate; wherein, the texture layer is made of transparent polyurethane.

An embodiment of the present application further provides an electronic device, where the electronic device includes: a display screen, a middle frame and the shell in the previous embodiment; the display screen is connected with one side of the middle frame, and the shell is connected with the other opposite side of the middle frame.

According to the shell, the manufacturing method of the shell and the electronic equipment, the color layer is formed on the base material layer made of polyurethane, so that the shell can achieve abundant colorful or gradient color pattern effects; meanwhile, a texture layer is formed on the color layer and is made of transparent polyurethane, so that patterns on the color layer can be displayed, the shell can realize abundant color texture or gradient color texture pattern effects by matching with the texture on the texture layer, and the appearance effect of leather-like can be realized. In addition, the substrate layer and the color layer made of polyurethane have good binding force, the texture layer made of transparent polyurethane has good binding force with the color layer and the substrate layer, and the defects of falling, layering and the like of the shell pattern can be avoided.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of an electronic device in some embodiments of the present application;

FIG. 2 is a schematic diagram of the electronic device in FIG. 1 with a split structure;

FIG. 3 is a schematic view of a stack of shells according to some embodiments of the present application;

FIG. 4 is a schematic view of a laminate structure of an appearance membrane in other embodiments of the present application;

FIG. 5 is a schematic view of a laminate structure of an appearance membrane in other embodiments of the present application;

FIG. 6 is a schematic flow chart of a method for forming an appearance membrane according to some embodiments of the present disclosure;

FIG. 7 is a schematic illustration of a process for forming a substrate layer in some embodiments of the present application;

FIG. 8 is a schematic illustration of a process for forming a textured layer in some embodiments of the present application;

FIG. 9 is a schematic flow chart illustrating a method for forming an appearance film in accordance with further embodiments of the present disclosure;

FIG. 10 is a schematic illustration of a process for forming a texture layer and an appearance layer according to some embodiments of the present application;

FIG. 11 is a schematic flow chart illustrating a method of fabricating a housing according to some embodiments of the present disclosure.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be noted that the following examples are only illustrative of the present application, and do not limit the scope of the present application. Likewise, the following examples are only some examples and not all examples of the present application, and all other examples obtained by a person of ordinary skill in the art without any inventive work are within the scope of the present application.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

As used herein, an "electronic device" (or simply "terminal") includes, but is not limited to, an apparatus that is configured to receive/transmit communication signals via a wireline connection, such as via a Public Switched Telephone Network (PSTN), a Digital Subscriber Line (DSL), a digital cable, a direct cable connection, and/or another data connection/network, and/or via a wireless interface (e.g., for a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter, and/or another communication terminal). A communication terminal arranged to communicate over a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal" or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; a Personal Communications System (PCS) terminal that may combine a cellular radiotelephone with data processing, facsimile and data communications capabilities; PDAs that may include radiotelephones, pagers, internet/intranet access, Web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. A cellular phone is an electronic device equipped with a cellular communication module.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of an electronic device 100 according to some embodiments of the present application, and fig. 2 is a schematic structural diagram of the electronic device 100 according to fig. 1.

The electronic device 100 provided in the embodiment of the present application may specifically be a mobile phone, a tablet computer, a notebook computer, and the like, and the following description will be given by taking the electronic device 100 as a mobile phone. The electronic device 100 may include a display screen 10, a bezel 20, and a housing 30. Wherein the display screen 10 may be connected to one side of the middle frame 20, and the case 30 may be connected to the other opposite side of the middle frame 20. All directional indications (such as up, down, left, right, front, and rear … …) in the embodiments of the present application are only used to explain the relative positional relationship between the components, the movement, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indication is changed accordingly.

Specifically, the display screen 10 may be used to provide an image display function for the electronic device 100, and the display screen 10 may be covered on one side of the middle frame 20, and may be fixed by an adhesive. The display screen 10 may include a transparent cover plate, a touch panel, and a display panel, which are sequentially stacked. The surface of the transparent cover plate can have the characteristics of flatness and smoothness, so that a user can conveniently perform touch operations such as clicking, sliding and pressing. The transparent cover plate may be made of a rigid material such as glass, or may be made of a flexible material such as Polyimide (PI) or Colorless Polyimide (CPI). The touch panel is disposed between the transparent cover and the display panel, and is configured to respond to a touch operation of a user, convert the touch operation into an electrical signal, and transmit the electrical signal to the processor of the electronic device 100, so that the electronic device 100 can make a corresponding response to the touch operation of the user. The display panel is mainly used for displaying pictures and can be used as an interactive interface to instruct a user to perform the touch operation on the transparent cover plate. The Display panel may adopt an OLED (Organic Light-Emitting Diode) or an LCD (Liquid Crystal Display) to realize an image Display function of the electronic device 100. In this embodiment, the transparent cover plate, the touch panel and the display panel may be attached together by using an optical Adhesive (OCA) or a Pressure Sensitive Adhesive (PSA). Meanwhile, the display screen 10 may be a double curved screen or a four curved screen in appearance to reduce a black edge of the display screen 10 and increase a visible area of the display screen 10. Accordingly, the display screen 10 may be a conventional flat screen, and only the display screen 10 can implement the graphic display function of the electronic device 100.

As shown in fig. 2, the middle frame 20 may include a middle plate 21 and a side frame 22 that are integrally formed, and they may be integrally formed by injection molding, punch forming, heat absorption forming, or the like. The frame 22 may be formed by extending the side wall of the middle plate 21 in the thickness direction of the middle plate 21, so that both sides of the middle frame 20 opposite to each other may form a corresponding open structure. The display screen 10 and the casing 30 may respectively cover the open structures on two opposite sides of the middle frame 20, so as to form an accommodating space of the electronic device 100 together with the middle frame 20. The accommodating space may be used for mounting electronic devices required by the electronic apparatus 100, such as a battery, a sensor, a circuit board, a camera, and the like. In some embodiments, the middle plate 21 and the side frame 22 may also be two independent structural members, and the two may be connected by one of assembling methods such as clamping, bonding, welding, and the like, and a combination thereof. Alternatively, the middle frame 20 may include only the bezel 22.

In addition, the material of the middle frame 20 may be glass, metal, hard plastic, etc., so that the middle frame 20 has a certain structural strength. Because the middle frame 20 is generally directly exposed to the external environment, the middle frame 20 may also have certain wear-resistant, corrosion-resistant, scratch-resistant, and other properties, or the outer surface of the middle frame 20 (i.e., the outer surface of the electronic device 100) may be coated with a layer of functional material for wear-resistant, corrosion-resistant, scratch-resistant, and the like. In addition, in some embodiments, a corresponding brand identifier (LOGO) may be further disposed on the middle frame 20 to beautify the appearance of the electronic device 100 and improve brand recognition.

Referring to fig. 3, fig. 3 is a schematic view of a stacked structure of a housing 30 according to some embodiments of the present disclosure.

The housing 30 may be a battery cover or a rear cover of the electronic device 100, that is, the housing 30 may not only be used to protect various functional devices in the accommodating space, but also achieve more diversified color effects, so as to improve the appearance effect of the electronic device 100. The case 30 may generally include a substrate 31, an appearance membrane 32, and an adhesive layer 33 formed between the substrate 31 and the appearance membrane 32.

The substrate 31 may be made of glass fiber, Polycarbonate (PC), polymethyl methacrylate (PMMA), glass, metal, or other structural materials. Those skilled in the art can select different materials of the substrate 31 according to different requirements to adapt to the housing 30 in different application scenarios, which is not limited herein. For example, the PC substrate can make the housing 30 thinner and lighter, the glass fiber substrate has better toughness, the PMMA substrate is highly transparent and easy to process, the glass substrate has better transparency, the metal substrate has better appearance effect, and the like.

The appearance film 32 is disposed on one side of the substrate 31 to enhance the appearance of the housing 30. Specifically, the substrate 31 may include a first surface 311 and a second surface 312 that are disposed opposite to each other, the first surface 311 may be a surface of the casing 30 facing away from the display screen 10 and exposed to the electronic device 100, and the second surface 312 may be a surface of the casing 30 close to the display screen 10 and hidden in the electronic device 100. The appearance membrane 32 is disposed on the first surface 311 of the substrate 31 to enhance the appearance of the housing 30.

Further, in order to achieve stability of the connection between the appearance film 32 and the substrate 31, the adhesive layer 33 is disposed between the appearance film 32 and the substrate 31, that is, the appearance film 32 can be adhesively connected to the substrate 31 by means of the adhesive layer 33, so that the appearance film 32 and the substrate 31 have high bonding strength. The Adhesive layer 33 can be made of a colloid such as an Optical Clear Adhesive (OCA), a Pressure Sensitive Adhesive (PSA), an Ethylene-Vinyl Acetate copolymer (EVA), or the like.

The thickness of the substrate 31 is typically 200-800 μm. For example, the thickness of the substrate 31 may be 200 μm, 300 μm, 400 μm, 500 μm, 600 μm, 800 μm, or the like.

The appearance film 32 may generally include a substrate layer 321, a color layer 322, and a texture layer 323.

The substrate layer 321 is arranged adjacent to the substrate 31, i.e. the substrate layer 321 can be adhesively connected to the surface of the substrate 31 by means of the adhesive layer 33. The color layer 322 is disposed on the substrate layer 321, that is, the color layer 322 is disposed on a side of the substrate layer 321 away from the substrate 31, so as to enrich the appearance effect of the appearance membrane 32. The texture layer 323 is arranged on the side of the color layer 322 facing away from the substrate layer 321, and the texture layer 323 and the color layer 322 cooperate to make the appearance membrane have a color texture or a gradient color texture.

The substrate layer 321 and the substrate 31 have high bonding strength therebetween, so that the overall structure of the housing 30 has high stability. Substrate layer 321, color layer 322 and texture layer 323 combine firmly between two liang for color layer 322 and texture layer 323 are difficult for producing phenomenons such as drops, skew, defect and layering, promote the whole outward appearance expressive force of casing 30.

In an embodiment, the substrate layer 321 may be made of Polyurethane (PU) material, which has characteristics of oil resistance, wear resistance, low temperature resistance, aging resistance, high hardness, elasticity, and the like, and may be used for manufacturing adhesives, paints, synthetic leather, and the like.

The definition of polyols in the preparation of polyurethane materials can be divided into polyester polyurethanes and polyether polyurethanes. The polyols for preparing polyether urethanes consist entirely of polyether polyols or are present in the system in a large proportion. In the molecular structure of polyether polyol, ether bond cohesive energy is low and the polyether polyol is easy to rotate, so that the polyurethane material prepared by the polyether polyol has good low-temperature flexibility and excellent hydrolysis resistance, and although the mechanical property is slightly inferior to that of polyester polyurethane, the viscosity of a raw material system is low and the processing performance is excellent. The polyols for the preparation of the polyester polyurethanes are exclusively polyester polyols or are present in the system in the largest part. Polyurethane materials based on polyester polyols generally have the characteristics of good mechanical properties, oil resistance, excellent wear resistance and the like. Polyester polyols have high cohesive energy, are mostly waxy solids at room temperature, and have high viscosity after being melted by heating.

The Polyurethane can be used for manufacturing Thermoplastic Polyurethane elastomer (TPU), the TPU is also called Thermoplastic Polyurethane rubber, the TPU is (AB) n type block linear polymer, A is polyester or polyether with high molecular weight (1000-6000), B is diol containing 2-12 straight chain carbon atoms, and the chemical structure between AB chain segments is diisocyanate. TPU relies on intermolecular hydrogen bond crosslinking or macromolecular interchain slight crosslinking, and the two crosslinking structures have reversibility along with the increase or decrease of temperature. The intermolecular force is weakened in a molten state or a solution state, and the intermolecular force is strongly connected together after cooling or solvent volatilization, so that the performance of the original solid is recovered. As mentioned above, TPU can be divided into polyester type and polyether type.

In an embodiment, the substrate layer 321 may be made of polyester polyurethane, so that the substrate layer 321 and the substrate 31 have high bonding strength.

The color layer 322 can be a transparent or semi-transparent colored ink layer. For example, the color oil may be blended according to the corresponding color, added to the ink main body, mixed well, and then printed on the substrate layer 321 uniformly. The color layer 322 may be formed on the substrate layer 321 by transferring, spraying, dip dyeing, electroplating, coating, or the like.

In an embodiment, the color layer 322 may be made of colored ink, so that the color layer 322 may form a color pattern or a gradient color pattern according to an expected requirement, thereby enriching the appearance color pattern of the housing 30 and improving the overall appearance expressive force of the electronic device.

The color layer 322 may use colored ink to form a color pattern or a gradient color pattern, or the color layer 322 may be formed by adding colored oil of a corresponding color to colorless ink. For example, when a khausen-colored oil is desired, a yellow toner, a red toner, a blue toner, and a solvent may be mixed to produce the khausen-colored oil. When a rose-gold colored oil is desired, a yellow toner, a violet toner, and a solvent may be mixed to produce the rose-gold colored oil. Of course, for other color oils, the color oil can be prepared by blending the toners of the corresponding colors according to the needs.

In one embodiment, the ink forming the color layer 322 is typically a polyester ink (e.g., an epoxy ink) that has good thermal curing properties. Based on this, in order to enable the color layer 322 and the substrate layer 321 to have a good bonding force, the substrate layer 321 may be made of polyester polyurethane. In addition, in order to better match the heat curing performance of the ink of the color layer 322, the substrate layer 321 may be made of a thermoplastic polyurethane elastomer. It is understood that when the color layer 322 is made of other inks, the corresponding base material layer 321 can be made of other polyurethane materials.

The texture layer 323 is disposed on a side of the color layer 322 facing away from the substrate layer 321, and is used to form a texture pattern, so that the texture layer 323 can cooperate with the color layer 322 to display a color texture or a gradient color texture effect. The texture layer 323 can be made of transparent polyurethane, so that on one hand, the color pattern or the gradient color pattern of the color layer 322 can be better shown, and on the other hand, the texture layer 323 can have better binding force with the substrate layer 321 and the color layer 322 respectively, thereby avoiding the phenomena of layering, falling off and the like. It can be understood that, when the color layer 322 forms a color pattern or a gradient color pattern, an area which is not covered by the color layer 322 exists on the substrate layer 321, at this time, the texture layer 323 is covered on the color layer 322, and the texture layer 323 is simultaneously in contact connection with the substrate layer 321 and the color layer 322, which not only can increase the stability of the overall structure of the appearance membrane 32, but also can protect the color layer 322 in the forming process of the appearance membrane 32, thereby avoiding the influence of the color layer 322 on the appearance expression effect of the appearance membrane 32.

In one embodiment, the surface of texture layer 323 facing away from color layer 322 is textured to create a leather-like effect in appearance and feel. That is, the surface of texture layer 323 facing away from color layer 322 is textured with texture that penetrates or does not penetrate texture layer 323 in the direction of color layer 322.

The texture layer 323 can be made of polyester polyurethane, so that the texture layer 323 has a good bonding force with the substrate layer 321 and the color layer 322, respectively. It is understood that when the materials of the substrate layer 321 and the color layer 322 are changed, the material of the texture layer 323 can be changed relatively, so as to provide a better bonding force between the layers of the exterior membrane 32.

According to the shell provided by the embodiment of the application, the color layer is formed on the base material layer made of polyurethane, so that the shell can achieve rich color or gradient color pattern effects; meanwhile, a texture layer is formed on the color layer and is made of transparent polyurethane, so that patterns on the color layer can be displayed, and the shell can realize abundant color textures or gradient color texture pattern effects by matching with the textures on the texture layer. In addition, the substrate layer and the color layer made of polyurethane have good binding force, the texture layer made of transparent polyurethane has good binding force with the color layer and the substrate layer, and the defects of falling, layering and the like of the shell pattern can be avoided.

Referring to fig. 4, fig. 4 is a schematic view of a laminated structure of an appearance film 32 in other embodiments of the present application, which is different from the previous embodiments in that: the appearance membrane 32 may also include a protective layer 324. Protective layer 324 is located between color layer 322 and texture layer 323, can protect color layer 322 in the casing 30 formation process on the one hand, and on the other hand can also promote color layer 322, the anti Ultraviolet (UV) light irradiation performance of substrate layer 321, makes color layer 322, substrate layer 321 be difficult for appearing the color yellow phenomenon.

The protective layer 324 may be made of transparent ink, and an ultraviolet absorber that can absorb UV light is added thereto. The ultraviolet absorbent is a light stabilizer which is most widely applied at present, and can be divided into salicylates, benzophenones, benzotriazoles, substituted acrylonitrile, triazines and the like according to the structure, and the benzophenones and the benzotriazoles are most widely applied in industry. The ultraviolet absorbent can absorb the ultraviolet part in sunlight and fluorescent light source without change. Since the sunlight contains a large amount of ultraviolet light harmful to the color layer 322 and the substrate layer 321, the color layer 322 and the substrate layer 321 are prone to yellowing under the irradiation of the ultraviolet light. The protection layer 324 can effectively absorb ultraviolet light, and further prevent the color layer 322 and the substrate layer 321 from yellowing.

The outward appearance diaphragm that this application embodiment provided through set up the protective layer between colour layer and texture layer, can avoid colour layer and substrate layer to appear the yellowing phenomenon under the illumination of ultraviolet ray.

Referring to fig. 5, fig. 5 is a schematic view of a laminated structure of an appearance film 32 in other embodiments of the present application, which is different from the previous embodiments in that: the appearance membrane 32 may also include an appearance layer 325. The appearance layer 325 is disposed on a side of the textured layer 323 facing away from the substrate layer 321.

The appearance layer 325 may be made of transparent polyurethane material, and a surface treatment agent capable of performing a corresponding surface treatment function is added thereto, so that the appearance membrane 32 has a better appearance effect. The appearance layer 325 made of transparent polyurethane material does not affect the appearance of the color texture pattern or the gradient color texture pattern of the appearance membrane 32, and can realize different appearance effects. In addition, the appearance layer 325 and the texture layer 323 made of transparent polyurethane materials have good bonding force, and can avoid the phenomena of falling, layering and the like.

Wherein, different appearance effects of the appearance layer can be realized aiming at different surface treatment agents. For example, the surface treatment agent may be a matting agent, an ultraviolet absorber, or the like, so that the surface of the design film can realize a smooth effect similar to the skin feel, a drying effect of drying without touching hands, and an anti-UV effect of being less likely to change color by UV light irradiation.

The appearance membrane that this application embodiment provided sets up the outward appearance layer through the one side that deviates from the substrate layer at the texture layer, can be so that the appearance membrane has better outward appearance effect.

Referring to fig. 6, fig. 6 is a schematic flow chart of a manufacturing method of an appearance membrane according to some embodiments of the present application, which can be used for manufacturing the appearance membrane in the above embodiments, and the manufacturing method substantially includes the following steps:

s601, providing a base material layer, wherein the base material layer is made of polyurethane.

Referring to fig. 7 in combination, fig. 7 is a schematic structural diagram of a process for forming a substrate layer in some embodiments of the present application, in which the substrate layer is made of TPU. The method of forming the base layer is roughly as follows:

first, the TPU is melted to a liquid state.

In a second step, the liquid TPU is injected into the feed device 50 and can flow out along the outlet 51 of the feed device 50. The liquid TPU flowing out of the outlet 51 flows into the molding device 60, and is cooled, solidified and molded after forming a desired structure in the molding device 60, so as to form the substrate layer 321. It will be appreciated that the TPU has reduced intermolecular forces in the molten or solution state and, upon cooling or solvent evaporation, has strong intermolecular forces to bond together, thereby restoring the original solid form.

The forming device 60 may form the substrate layer by rolling the double-sided molding film. Specifically, the molding device 60 may include two rollers 61 disposed at an interval, and molding films 62 wound around the two rollers, respectively. The gap between the two rollers is arranged corresponding to the discharge port 51 of the feeding device, and the forming film 62 can be rolled on the roller 61 and can extend from the roller 61. In the embodiment, the forming film 62 extends out of the roller 61 along a direction away from the discharge port 51, so that the liquid TPU flowing in between the two rollers 61 can be filled between the two forming films 62, and then the liquid TPU is cooled and solidified to form the base material layer 321 with the forming film 62 attached to the upper and lower surfaces. It is understood that the molding film 62 may be made of polyethylene terephthalate (PET), Polycarbonate (PC), or the like.

In one embodiment, the thickness of the substrate layer 321 is affected by the gap between the two rollers 61 and the thickness of the molding film 62, and the thickness of the substrate layer 321 is generally 100 μm and 300 μm. For example, the thickness of the base material layer 321 may be 100 μm, 200 μm, 300 μm, or the like.

And S602, forming a color layer on the base material layer. And removing the forming film on one surface of the substrate layer, and printing colored ink on the surface of the substrate layer in a printing mode to form a light-transmitting or semi-light-transmitting colored ink layer. The color layer may present a color pattern, a single gradient color pattern, or multiple gradient color patterns according to needs, and the embodiment of the present invention is not limited to the representation form of the specific pattern of the color layer. In an embodiment, the color layer may be directly printed on the surface of the substrate layer by using a lithography method, because the color layer formed by using the lithography method may be thinner, and the surface may be smoother and less rough than the color layer formed by using a screen printing method.

Of course, in other embodiments, the color layer may be formed on the base material layer by transfer, spray coating, dip dyeing, plating, coating, or the like.

In one embodiment, the color layer has a thickness of typically 5-30 μm. For example, the color layer may have a thickness of 7 μm, 10 μm, 14 μm, 15 μm, 20 μm, 21 μm, 28 μm, or the like.

And S603, forming a texture layer on one side, away from the base material layer, of the color layer to form the appearance membrane.

Referring to fig. 8, fig. 8 is a schematic structural diagram of a process for forming a texture layer according to some embodiments of the present application, in which, for example, the texture layer is made of transparent PU, the method for forming the texture layer substantially includes the following steps:

firstly, preparing transparent PU into paste.

In a second step, a textured paper or sheet 70 having texture is provided, and the transparent PU paste is drawn on the textured paper or sheet 70 to form a textured layer. It will be appreciated that multiple layers of the transparent PU paste can be drawn down according to the actual appearance requirements.

And thirdly, pressing the TPU substrate layer on the transparent PU paste on the texture paper or the texture sheet to enable the color layer to be in contact with the PU paste for pressing, then baking to enable the PU paste to be solidified to form a texture layer on one side of the color layer departing from the substrate layer, and finally removing the texture paper or the texture sheet, namely forming textures on the surface of the texture layer departing from the color layer to form a leather-like effect in appearance and touch. Of course, in other embodiments, the texture layer may also be directly formed on the side of the color layer away from the substrate layer by means of transfer printing, silk-screen printing, or the like. The texture layer is formed by a texture layer, wherein the texture layer is opposite to the surface of the color layer and forms a texture penetrating or not penetrating through the texture layer in the direction of the color layer.

In one embodiment, the thickness of the textured layer is typically 80-120 μm. For example, the thickness of the texture layer may be 80 μm, 90 μm, 100 μm, 110 μm, 120 μm.

Referring to fig. 9, fig. 9 is a schematic flow chart illustrating a manufacturing method of an appearance film in another embodiment of the present application, where the manufacturing method can be used for manufacturing the appearance film in the above embodiment, and the manufacturing method generally includes the following steps:

s901, providing a substrate layer, which can refer to step S601, and therefore is not described herein.

S902, forming a color layer on the substrate layer, wherein the step can refer to the step S602, and thus is not described herein.

And S903, forming a protective layer on one side of the color layer, which is far away from the substrate layer. The ink to which the ultraviolet absorber is added may be printed on the color layer by printing to form a protective layer capable of absorbing ultraviolet rays. In one embodiment, the protective layer may be printed on the color layer by using a lithography method, because the protective layer formed by using the lithography method may be thinner, and has a smoother surface and less roughness than those formed by using a screen printing method. Of course, in other embodiments, the protective layer may be formed on the base layer by transfer, spray coating, dip dyeing, plating, coating, or the like.

In one embodiment, the thickness of the protective layer is typically 5-20 μm. For example, the thickness of the protective layer may be 5 μm, 7 μm, 10 μm, 14 μm, 15 μm, 20 μm, or the like.

And S904, forming a texture layer and an appearance layer on the side, facing away from the base material layer, of the protective layer to form the appearance membrane. Wherein, the texture layer is arranged between the appearance layer and the protective layer.

Referring to fig. 10, fig. 10 is a schematic structural diagram of a process for forming a texture layer and an appearance layer according to some embodiments of the present application, in which for example the texture layer is made of transparent PU and the appearance layer is made of transparent PU, the method for forming the texture layer and the appearance layer is substantially as follows:

firstly, preparing transparent PU into paste.

Secondly, dividing the transparent PU paste into two parts, adding a surface treatment agent into one part of the transparent PU paste, and uniformly stirring; the other clear PU paste was not added with a surface treatment agent.

And a third step of providing a textured paper or a textured sheet 70 having texture, and knife-coating the transparent PU paste added with the surface treatment agent on the textured paper or the textured sheet 70 to form an appearance layer.

And fourthly, coating the transparent PU paste without the surface treatment agent on the transparent PU paste with the surface treatment agent to form a texture layer.

It is to be understood that the transparent PU paste to which the surface treatment agent is added may be drawn down with a plurality of layers, and the transparent PU paste to which the surface treatment agent is not added may be drawn down with a plurality of layers, which is not particularly limited.

And step five, laminating the TPU substrate layer on the transparent PU paste on the texture paper or the texture sheet to enable the color layer to be in contact with the PU paste without the surface treatment agent for lamination, then baking to enable the PU paste to be cured to form a texture layer and an appearance layer, and finally removing the texture paper or the texture sheet. The transparent PU paste added with the surface treatment agent forms an appearance layer, the transparent PU paste not added with the surface treatment agent forms a texture layer, and the appearance layer is arranged on one side of the texture layer, which is far away from the color layer.

It will be appreciated that in this embodiment, the surface of the appearance layer facing away from the texture layer is textured.

In one embodiment, the appearance layer is typically 5-20 μm thick. For example, the thickness of the appearance layer may be 5 μm, 8 μm, 10 μm, 14 μm, 15 μm, 20 μm, or the like.

It can be understood that the molding film on the side of the substrate layer departing from the color layer can be removed before the appearance membrane is attached to the substrate, so as to avoid polluting the attaching surface of the substrate layer attached to the substrate in the manufacturing process. Referring to fig. 11, fig. 11 is a schematic flow chart illustrating a method for manufacturing a housing according to some embodiments of the present disclosure, where the method generally includes the following steps:

s1101, providing an appearance membrane, which may be the appearance membrane in the foregoing embodiment, and thus not described herein.

S1102, providing a substrate, and attaching the appearance film to one side of the substrate. It can be understood that the appearance membrane can be fixed to the substrate by bonding with colloids such as OCA, PSA, EVA, etc. And removing the molding film on the side of the substrate layer departing from the color layer before the appearance membrane is bonded with the substrate. In this embodiment, the substrate layer deviates from the one side on the color layer and can be fixed with the substrate through the glue such as OCA, PSA, EVA.

It should be noted that, for technical features not described in detail in the embodiments of the present application, reference may be made to the detailed description in the foregoing embodiments, and therefore, no further description is provided in this embodiment.

It is noted that the terms "comprises" and "comprising," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

The above description is only a part of the embodiments of the present application, and not intended to limit the scope of the present application, and all equivalent devices or equivalent processes performed by the content of the present application and the attached drawings, or directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims

1. A housing for an electronic device, the housing comprising:

a substrate; and

an appearance membrane, the appearance membrane is located one side of base plate, the appearance membrane includes:

the substrate layer is made of polyurethane;

the color layer is arranged on the base material layer; and

the texture layer is arranged on one side, away from the base material layer, of the color layer;

wherein, the texture layer is made of transparent polyurethane.

2. The housing of claim 1 wherein a surface of the textured layer facing away from the color layer is textured.

3. The housing of claim 1, further comprising a protective layer disposed between the color layer and the texture layer.

4. The housing of claim 2, further comprising an appearance layer disposed on a side of the textured layer facing away from the substrate layer.

5. The housing of claim 1, wherein the substrate layer is made of polyester polyurethane and the texture layer is made of polyester polyurethane.

6. The housing of claim 5, wherein the substrate layer is made of a thermoplastic polyurethane elastomer.

7. The housing of any of claims 1-6, further comprising an adhesive layer disposed between the substrate and the appearance membrane.

8. A method of making a housing, the method comprising:

providing a substrate layer, wherein the substrate layer is made of polyurethane;

forming a color layer on the substrate layer;

forming a texture layer on one side, away from the base material layer, of the color layer to form an appearance membrane;

providing a substrate, and arranging the appearance membrane on one side of the substrate;

wherein, the texture layer is made of transparent polyurethane.

9. The method of claim 8, wherein the substrate layer is formed by rolling a double-sided molding film.

10. The method of claim 8, wherein the color layer is formed directly on the substrate layer by lithography.

11. The method of claim 8, wherein the step of forming a textured layer further comprises: and forming an appearance layer on one side of the texture layer, which is far away from the color layer.

12. The method according to claim 8, further comprising, after the forming the color layer on the substrate layer: and forming a protective layer on one side of the color layer, which deviates from the substrate layer.

13. An electronic device, characterized in that the electronic device comprises: a display screen, a middle frame, and the housing of any one of claims 1-7; the display screen is connected with one side of the middle frame, and the shell is connected with the other opposite side of the middle frame.