WO2023036086A1

WO2023036086A1 - Housing and manufacturing method therefor, and electronic device

Info

Publication number: WO2023036086A1
Application number: PCT/CN2022/117097
Authority: WO
Inventors: 高亮
Original assignee: 深圳市锐尔觅移动通信有限公司
Priority date: 2021-09-07
Filing date: 2022-09-05
Publication date: 2023-03-16
Also published as: CN113895129A

Abstract

A housing and a manufacturing method therefor, and an electronic device. The housing comprises a substrate and an appearance diaphragm, wherein the appearance diaphragm is arranged on one side of the substrate; the appearance diaphragm comprises a substrate layer, a color layer and a textured layer; the substrate layer is made of polyurethane; the color layer is arranged on the substrate layer; the textured layer is arranged on the side of the color layer away from the substrate layer; and the textured layer is made of transparent polyurethane. The housing forms the color layer on the substrate layer made of polyurethane, such that the housing can achieve a rich color or gradient pattern effect; in addition, the textured layer is formed on the color layer, and the textured layer is made of transparent polyurethane, such that the pattern of the color layer can appear, and the housing can achieve a rich color texture or a gradient color texture pattern effect through the cooperation of the texture of the textured layer.

Description

Housing, manufacturing method thereof, and electronic device

This application claims the priority of the Chinese patent application with the application number 202111045917.X filed on September 07, 2021, and the title of the invention is "housing and its manufacturing method, electronic equipment", which is incorporated by reference in its entirety Apply.

technical field

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

Background technique

With the continuous development of electronic equipment, electronic equipment has become an indispensable entertainment tool and social tool in people's daily life, and people's demand for electronic equipment is also increasing. Taking mobile phones as an example, some mobile phone rear shells will be decorated accordingly to enhance the appearance of the mobile phone and bring users a good visual experience. For example, an appearance diaphragm with a leather-like appearance is formed on the back shell of the mobile phone to form a balanced and delicate texture effect. However, the back shell of the existing leather-like appearance diaphragm has a single color, which is not conducive to the appearance of the product.

Contents of the invention

On the one hand, the embodiment of the present application provides a casing for electronic equipment, the casing includes a substrate and an appearance diaphragm, the appearance diaphragm is arranged on one side of the substrate; the appearance diaphragm includes a base material layer, color layer and texture layer, the base material layer is made of polyurethane; the color layer is arranged on the base material layer; the texture layer is arranged on a side of the color layer away from the base material layer side; wherein, the texture layer is made of transparent polyurethane.

Another aspect of the embodiment of the present application provides a method for manufacturing a shell, the method includes: providing a base material layer, the base material layer is made of polyurethane; forming a color layer on the base material layer; Form a texture layer on the side of the color layer away from the base layer to form an appearance film; provide a substrate, and set the appearance film on one side of the substrate; wherein, the texture layer adopts Made of clear polyurethane.

The embodiment of the present application also provides an electronic device, the electronic device includes: a display screen, a middle frame and a casing; the display screen is connected to one side of the middle frame, and the casing is connected to the middle frame The other opposite side is connected; the housing includes a substrate and an appearance film, and the appearance film is arranged on one side of the substrate, wherein the appearance film includes a base material layer, a color layer and a texture layer, The substrate layer is made of polyurethane; the color layer is arranged on the substrate layer; the texture layer is arranged on the side of the color layer away from the substrate layer; the texture layer is made of transparent polyurethane production.

In the casing, its manufacturing method, and electronic device provided in the embodiments of the present application, a color layer is formed on a base material layer made of polyurethane, so that the casing can achieve rich color or gradient color pattern effects; at the same time, a color layer is formed on the color layer Texture layer, and the texture layer is made of transparent polyurethane, so that the pattern of the color layer can be displayed, and with the texture of the texture layer, the shell can achieve rich color texture or gradient texture pattern effect, and can achieve a leather-like appearance Effect. In addition, the substrate layer made of polyurethane has good bonding force with the color layer, and the texture layer made of transparent polyurethane has good bonding force with the color layer and the substrate layer respectively, which can avoid shell There are defects such as shedding and delamination of the body pattern.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

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

Fig. 2 is a schematic diagram of the structural disassembly of the electronic device in the embodiment of Fig. 1;

Fig. 3 is a schematic diagram of the laminated structure of the housing in some embodiments of the present application;

Fig. 4 is a schematic diagram of the laminated structure of the appearance diaphragm in other embodiments of the present application;

Fig. 5 is a schematic diagram of the laminated structure of the appearance film in other embodiments of the present application;

Fig. 6 is a schematic flow chart of the manufacturing method of the appearance diaphragm in some embodiments of the present application;

Fig. 7 is a schematic diagram of a process structure for forming a substrate layer in some embodiments of the present application;

Fig. 8 is a schematic diagram of a process structure for forming a texture layer in some embodiments of the present application;

Fig. 9 is a schematic flow chart of a method for making an appearance film in other embodiments of the present application;

Fig. 10 is a schematic diagram of the process structure for forming a texture layer and an appearance layer in some embodiments of the present application;

Fig. 11 is a schematic flow chart of the manufacturing method of the housing in some embodiments of the present application.

Detailed ways

The application will be described in further detail below in conjunction with the accompanying drawings and embodiments. In particular, the following examples are only used to illustrate the present application, but not to limit the scope of the present application. Likewise, the following embodiments are only some of the embodiments of the present application but not all of them, and all other embodiments obtained by those skilled in the art without creative efforts fall within the protection 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 present application. The occurrences of this 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 understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments.

An embodiment of the present application provides a casing for an electronic device on the one hand, the casing includes a substrate and an appearance membrane, the appearance membrane is arranged on one side of the substrate; the appearance membrane includes a base material layer, color layer and texture layer, the base material layer is made of polyurethane; the color layer is arranged on the base material layer; the texture layer is arranged on a side of the color layer away from the base material layer side; wherein, the texture layer is made of transparent polyurethane.

In one embodiment, texture is formed on the surface of the texture layer away from the color layer.

In one embodiment, the casing further includes a protective layer, and the protective layer is disposed between the color layer and the texture layer.

In one embodiment, the protective layer is made of transparent ink and added with a UV absorber capable of absorbing UV light.

In one embodiment, the casing further includes an appearance layer, and the appearance layer is disposed on a side of the texture layer away from the base material layer.

In one embodiment, the appearance layer is made of transparent polyurethane material and added with a surface treatment agent.

In one embodiment, the substrate layer is made of polyester polyurethane, and the texture layer is made of polyester polyurethane.

In one embodiment, the substrate layer is made of thermoplastic polyurethane elastomer.

In one embodiment, the housing further includes an adhesive layer, and the adhesive layer is disposed between the substrate and the appearance film.

In one embodiment, the substrate includes a first surface and a second surface opposite to each other, the first surface is the surface of the casing exposed to the electronic device, and the base material layer of the appearance film is set On the first surface, the color layer is disposed on a side of the substrate layer away from the first surface.

In one embodiment, the substrate layer is formed by double-laminated film rolling.

In one embodiment, the step of forming the substrate layer includes: melting the thermoplastic polyurethane elastomer into a liquid state, injecting the liquid thermoplastic polyurethane elastomer into the feeding device and flowing out along the outlet of the feeding device; The liquid thermoplastic polyurethane elastomer flowing out from the discharge port flows into a forming device, and the forming device adopts a method of double pasting forming film rolling to form the base material layer.

In one embodiment, the color layer is directly formed on the substrate layer by lithography.

In one embodiment, the step of forming the texture layer includes: making a paste-like paste from transparent polyurethane, and providing a textured paper or texture sheet, and scraping the paste on the textured paper or on the textured sheet; the substrate layer is placed on the paste, so that the color layer and the ester paste are in contact with each other and pressed, and baked so that the paste is solidified so that the color layer deviates from One side of the substrate layer forms the texture layer.

In one embodiment, the step of forming the texture layer further includes: forming an appearance layer on the side of the texture layer away from the color layer.

In one embodiment, the step of forming the appearance layer and the texture layer includes:

Making a paste-like paste from the transparent polyurethane material, and dividing the paste into two parts; adding a surface treatment agent to one of the pastes and stirring evenly;

providing a textured textured paper or textured sheet, and scraping a portion of the paste added with a surface treatment agent on the textured paper or textured sheet to form the appearance layer;

Squeegee coating the paste without adding surface treatment agent on the appearance layer to form the texture layer.

In one embodiment, after forming the color layer on the base layer, the step further includes: forming a protective layer on a side of the color layer away from the base layer.

In one embodiment, the substrate has a first surface, and the first surface is the surface of the substrate away from the display screen; the base material layer is disposed on the first surface, and the color layer is disposed on the first surface. on the side of the substrate layer away from the first surface.

"Electronic equipment" (or simply "terminal") as used herein includes, but is not limited to, configured to direct cable connection, and/or another data connection/network) and/or via (for example, for cellular networks, wireless local area networks (WLAN), digital television networks such as DVB-H networks, satellite networks, AM-FM broadcast transmitters , and/or a device for receiving/sending communication signals via a wireless interface of 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; Personal Communications Systems (PCS) terminals that may combine cellular radiotelephones with data processing, facsimile, and data communication capabilities; may include radiotelephones, pagers, Internet/Intranet access , a PDA with a web browser, organizer, calendar, and/or Global Positioning System (GPS) receiver; and a conventional laptop and/or palm-type receiver or other electronic device including a radiotelephone transceiver. A mobile phone is an electronic device equipped with a cellular communication module.

Please refer to FIG. 1 and FIG. 2 , FIG. 1 is a schematic structural diagram of an electronic device 100 in some embodiments of the present application, and FIG. 2 is a schematic diagram of a disassembled structure of the electronic device 100 in the embodiment of FIG. 1 .

The electronic device 100 provided in the embodiment of the present application may specifically be a device such as a mobile phone, a tablet computer, a notebook computer, etc. The following description will be made by taking the electronic device 100 as a mobile phone. The electronic device 100 may include a display screen 10 , a middle frame 20 and a casing 30 . Wherein, the display screen 10 can be connected with one side of the middle frame 20 , and the casing 30 can be connected with another opposite side of the middle frame 20 . All directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative positional relationship between the various components in a certain posture (as shown in the drawings) , sports conditions, etc., if the specific posture changes, the directional indication also changes accordingly.

Specifically, the display screen 10 can be used to provide an image display function for the electronic device 100, and the display screen 10 can be covered on one side of the middle frame 20, and the two can be bonded and fixed by glue. The display screen 10 may include a transparent cover plate, a touch panel, and a display panel that are sequentially stacked. Wherein, the surface of the transparent cover can be flat and smooth, so that the user can perform touch operations such as clicking, sliding, and pressing. The material of the transparent cover can be a rigid material such as glass, or a flexible material such as polyimide (Polyimide, PI) or colorless polyimide (Colorless Polyimide, CPI). The touch panel is arranged between the transparent cover and the display panel, and is used to respond to the user's touch operation, and convert the corresponding touch operation into an electrical signal and transmit it to the processor of the electronic device 100, so that the electronic device 100 can control the user's The touch operation reacts accordingly. The display panel is mainly used for displaying images, and can be used as an interactive interface to instruct the user to perform the above-mentioned touch operation on the transparent cover. The display panel can use OLED (Organic Light-Emitting Diode, organic light-emitting diode) or LCD (Liquid Crystal Display, liquid crystal display) to realize the image display function of the electronic device 100. In this embodiment, the transparent cover, the touch panel, and the display panel can be glued together by OCA (Optically Clear Adhesive, optical adhesive), PSA (Pressure Sensitive Adhesive, pressure-sensitive adhesive) and the like. At the same time, the display screen 10 may be a hyperbolic screen or a four-curved screen in appearance, so as to reduce the black border of the display screen 10 and increase the visible area of the display screen 10 . Correspondingly, the display screen 10 may also be a conventional flat screen, it only needs that the display screen 10 can realize 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 frame 22 with an integrated structure, and the two may be integrally formed by injection molding, stamping molding, heat absorption molding and other processes. Wherein, 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 the opposite sides of the middle frame 20 can form corresponding open structures. The display screen 10 and the housing 30 can respectively cover the open structures on opposite sides of the middle frame 20 , so as to enclose together with the middle frame 20 to form an accommodating space for the electronic device 100 . The accommodating space can be used for installing electronic devices required by the electronic device 100 , such as batteries, sensors, circuit boards, cameras and the like. In some embodiments, the middle plate 21 and the frame 22 can also be two mutually independent structural parts, and the two can be connected by one or a combination of assembly methods such as clamping, bonding and welding. Alternatively, the middle frame 20 may also only include the frame 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. Wherein, since the middle frame 20 is generally directly exposed to the external environment, the middle frame 20 may also have certain properties such as wear resistance, corrosion resistance, and scratch resistance, or the outer surface of the middle frame 20 (that is, the outer surface of the electronic device 100 ) Coating a layer of functional material for wear resistance, corrosion resistance and scratch resistance. In addition, in some embodiments, the middle frame 20 may also be provided with a corresponding brand logo (LOGO) to beautify the appearance of the electronic device 100 and improve brand recognition.

Please refer to FIG. 3 . FIG. 3 is a schematic diagram of the laminated structure of the casing 30 in some embodiments of the present application.

The casing 30 can be the battery cover or the back cover of the electronic device 100, that is, the casing 30 can not only protect various functional devices in the accommodation space, but also realize more diverse color effects, so as to improve the performance of the electronic device 100. Appearance effect. The housing 30 generally includes a substrate 31 , an appearance film 32 and an adhesive layer 33 formed between the substrate 31 and the appearance film 32 .

The material of the substrate 31 can be glass fiber, polycarbonate (Polycarbonate, PC), polymethyl methacrylate (polymethyl methacrylate, PMMA), glass, metal and other structural materials. Those skilled in the art can select substrates 31 made of different materials according to different requirements, so as to be suitable for the casing 30 in different application scenarios, and this is not limited. For example, the PC base material can make the housing 30 lighter and thinner, the glass fiber base material has better toughness, the PMMA base material is highly transparent and easy to process, the glass base material has better transparency, and the metal base material has better appearance effects, etc.

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

Further, in order to achieve the stability of the connection between the appearance film 32 and the substrate 31, an adhesive layer 33 is provided between the appearance film 32 and the substrate 31, that is, the appearance film 32 can be connected with the substrate 31 by means of the adhesive layer 33. Adhesive connection, so that there is a higher bonding strength between the appearance film 32 and the substrate 31 . The adhesive layer 33 can be made of optical adhesive (Optically Clear Adhesive, OCA), pressure sensitive adhesive (Pressure Sensitive Adhesive, PSA), ethylene-vinyl acetate copolymer (Ethylene-Vinyl Acetate copolymer, EVA) and other colloids.

Wherein, the thickness of the substrate 31 is generally 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 generally includes a base material layer 321 , a color layer 322 and a texture layer 323 .

The substrate layer 321 is disposed adjacent to the substrate 31 , that is, the substrate layer 321 can be bonded to the surface of the substrate 31 by means of the adhesive layer 33 . The color layer 322 is disposed on the base layer 321 , that is, the color layer 322 is disposed on the side of the base layer 321 away from the substrate 31 , so as to enrich the appearance effect of the appearance film 32 . The texture layer 323 is arranged on the side of the color layer 322 away from the substrate layer 321, and the texture layer 323 cooperates with the color layer 322 so that the appearance film has a color texture or a gradient texture.

Wherein, the base material layer 321 and the substrate 31 have a relatively high bonding strength, so that the overall structure of the housing 30 has better stability. The substrate layer 321, the color layer 322, and the texture layer 323 are firmly bonded to each other, so that the color layer 322 and the texture layer 323 are not easy to be peeled off, shifted, damaged, and delaminated, and the overall appearance of the casing 30 is improved. .

In one embodiment, the substrate layer 321 can be made of polyurethane (polyurethane, PU). Polyurethane has properties such as oil resistance, abrasion resistance, low temperature resistance, aging resistance, high hardness, and elasticity, and can be used to make adhesives, Coatings, synthetic leather, etc.

According to the definition of polyols in the preparation of polyurethane materials, polyurethane can be divided into polyester polyurethane and polyether polyurethane. The polyols used to prepare polyether polyurethanes consist entirely of polyether polyols or account for the vast majority in the system. In the molecular structure of polyether polyol, the cohesive energy of ether bonds is low and easy to rotate, so the polyurethane material prepared from it has good low-temperature flexibility and excellent hydrolysis resistance. Although the mechanical properties are slightly inferior to polyester polyurethane, the raw material system Low viscosity, excellent processability. The polyols used to prepare polyester polyurethanes consist entirely of polyester polyols or occupy the vast majority of the system. Polyurethane materials based on polyester polyols usually have the characteristics of good mechanical and mechanical properties, oil resistance, and excellent wear resistance. The cohesive energy of polyester polyol is large, and it is mostly waxy solid at room temperature, and the viscosity after heating and melting is relatively high.

Among them, polyurethane can be used to make thermoplastic polyurethane elastomer (Thermoplastic Polyurethane, TPU), thermoplastic polyurethane elastomer, also known as thermoplastic polyurethane rubber, is a kind of (AB) n-type block linear polymer, A is high molecular weight (1000 ~ 6000) The polyester or polyether, B is a diol containing 2 to 12 straight chain carbon atoms, and the chemical structure between the AB chain segments is diisocyanate. TPU is cross-linked by intermolecular hydrogen bonds or slightly cross-linked between macromolecular chains. As the temperature increases or decreases, these two cross-linked structures are reversible. In the molten state or solution state, the intermolecular force weakens, and after cooling or solvent volatilization, strong intermolecular force connects together, restoring the performance of the original solid. As mentioned above, TPU can be divided into polyester type and polyether type.

In one embodiment, the base layer 321 can be made of polyester polyurethane, so that the base layer 321 and the substrate 31 have a higher bonding strength.

The color layer 322 can be a transparent or semi-transparent colored ink layer. For example, the color oil can be mixed according to the corresponding color, the color oil can be added into the ink body and mixed well, and then the ink can be evenly printed on the substrate layer 321 . Wherein, the color layer 322 can be formed on the substrate layer 321 by means of transfer printing, spray coating, dip dyeing, electroplating, coating and the like.

In one embodiment, the color layer 322 can be made of colored ink, so that the color layer 322 can form a color pattern or a gradient color pattern according to the expected demand, thereby enriching the appearance color pattern of the housing 30 and improving the overall appearance of the electronic device expressiveness.

Wherein, the color layer 322 can use colored ink to form a color pattern or a gradient color pattern, or the color layer 322 can be formed by adding color oil of a corresponding color to the colorless ink. For example, when the color oil of Tuhao gold color is needed, yellow toner, red toner, blue toner can be mixed with solvent to obtain the color oil of Tuhao gold color. When the color oil of rose gold color is needed, the color oil of rose gold color can be obtained by mixing yellow toner, purple toner and solvent. Certainly, for color oils of other colors, toners of corresponding colors can be prepared as required.

In one embodiment, the ink forming the color layer 322 is generally polyester ink (such as epoxy ink), which has better thermosetting performance. Based on this, in order to have a better bonding force between the color layer 322 and the substrate layer 321, the substrate layer 321 can be made of polyester polyurethane. In addition, in order to better match the thermal curing performance of the color layer 322 ink, the base material layer 321 can be made of thermoplastic polyurethane elastomer. It can be understood that when the color layer 322 is made of other inks, the substrate layer 321 can also be made of other polyurethane materials accordingly.

The texture layer 323 is disposed on the side of the color layer 322 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 texture effect. Wherein, the texture layer 323 can be made of transparent polyurethane. On the one hand, the color pattern or gradient color pattern of the color layer 322 can be better shown; It has a good bonding force between them to avoid delamination and falling off. It can be understood that when the color layer 322 forms a color pattern or a gradient color pattern, there is an area on the substrate layer 321 that is not covered by the color layer 322. At this time, the texture layer 323 is covered on the color layer 322, and the texture layer 323 simultaneously The contact connection with the base material layer 321 and the color layer 322 can not only increase the stability of the overall structure of the appearance film 32, but also protect the color layer 322 during the formation of the appearance film 32, so as to avoid damaging the color layer 322 and affecting the appearance The appearance of the diaphragm 32 expresses the effect.

In one embodiment, texture is formed on the surface of the texture layer 323 away from the color layer 322 to form a leather-like effect in appearance and touch. That is, the surface of the texture layer 323 away from the color layer 322 faces toward the color layer 322 to form a texture that penetrates or does not penetrate the texture layer 323 .

Wherein, the texture layer 323 can be made of polyester polyurethane, so that the texture layer 323 has better bonding force with the base material layer 321 and the color layer 322 respectively. It can be understood that when the materials of the base material layer 321 and the color layer 322 are changed, the material of the texture layer 323 can also be changed relatively, so that the layers of the appearance film 32 have better bonding force.

In the housing provided in the embodiment of the present application, by forming a color layer on a base material layer made of polyurethane, the housing can achieve rich color or gradient color pattern effects; at the same time, a texture layer is formed on the color layer, and the texture layer It is made of transparent polyurethane, so that the pattern of the color layer can be displayed, and with the texture of the texture layer, the shell can achieve rich color texture or gradient texture pattern effect. In addition, the substrate layer made of polyurethane has good bonding force with the color layer, and the texture layer made of transparent polyurethane has good bonding force with the color layer and the substrate layer respectively, which can avoid shell There are defects such as shedding and delamination of the body pattern.

Please refer to FIG. 4 . FIG. 4 is a schematic diagram of the laminated structure of the appearance film 32 in another embodiment of the present application. The protective layer 324 is arranged between the color layer 322 and the texture layer 323. On the one hand, it can protect the color layer 322 during the formation of the casing 30, and on the other hand, it can also improve the color layer 322 and the base material layer 321 to resist ultraviolet rays (Ultraviolet). Rays, UV) light irradiation performance, so that the color layer 322 and the base material layer 321 are less prone to yellowing.

The protective layer 324 can be made of transparent ink, and an ultraviolet absorber capable of absorbing UV light is added therein. UV absorbers are the most widely used light stabilizers at present. According to their structures, they can be divided into salicylates, benzophenones, benzotriazoles, substituted acrylonitriles, triazines, etc. The most widely used in the world are benzophenones and benzotriazoles. Ultraviolet absorbers can absorb the ultraviolet part of sunlight and fluorescent light sources without changing themselves. Since sunlight contains a large amount of ultraviolet light that is harmful to the color layer 322 and the base layer 321 , the color layer 322 and the base layer 321 are prone to yellowing under the irradiation of these ultraviolet rays. The protection layer 324 can effectively absorb ultraviolet light, thereby preventing the color layer 322 and the base material layer 321 from turning yellow.

The appearance film provided in the embodiment of the present application can prevent the yellowing of the color layer and the base material layer under the irradiation of ultraviolet light by providing a protective layer between the color layer and the texture layer.

Please refer to FIG. 5 . FIG. 5 is a schematic diagram of the laminated structure of the appearance film 32 in another embodiment of the present application. The appearance layer 325 is disposed on a side of the texture layer 323 away from the base layer 321 .

The appearance layer 325 can be made of a transparent polyurethane material, and a surface treatment agent capable of realizing a corresponding surface treatment function is added therein, so that the appearance film 32 has a better appearance effect. Among them, the appearance layer 325 made of transparent polyurethane material will not affect the appearance of the color texture pattern or gradient texture pattern of the appearance film 32 on the one hand, and on the other hand, it can also achieve different appearance performance effects. In addition, the appearance layer 325 and the texture layer 323 made of transparent polyurethane material have good bonding force, which can avoid falling off, delamination and the like.

Among them, according to different surface treatment agents, different appearance effects of the appearance layer can be realized. For example, the surface treatment agent can be matting powder, ultraviolet absorber, etc., so that the surface of the appearance film can achieve a smooth effect similar to skin, a dry effect that does not stick to hands, and an anti-UV effect that is not easy to change color under UV light irradiation.

For the appearance film provided in the embodiment of the present application, by disposing the appearance layer on the side of the texture layer away from the substrate layer, the appearance film can have a better appearance effect.

Please refer to Fig. 6. Fig. 6 is a schematic flow chart of the manufacturing method of the appearance diaphragm in some embodiments of the present application. The manufacturing method can be used to manufacture the appearance diaphragm in the above-mentioned embodiments. The manufacturing method generally includes the following steps:

S601. Provide a substrate layer, where the substrate layer is made of polyurethane.

Referring to FIG. 7 in combination, FIG. 7 is a schematic diagram of a process structure for forming a substrate layer in some embodiments of the present application. The substrate layer is made of TPU as an example. The method of forming the substrate layer is roughly as follows:

The first step is to melt the TPU into a liquid state.

In the second step, the liquid TPU is injected into the feeding device 50 and can flow out along the outlet 51 of the feeding device 50 . The liquid TPU flowing out from the outlet 51 flows into the molding device 60 , and after forming a desired structure in the molding device 60 , it is cooled and solidified to form the base material layer 321 . It can be understood that the intermolecular force of TPU weakens in the molten state or solution state, and after cooling or solvent volatilization, strong intermolecular force connects together, thereby restoring the original solid state.

Wherein, the forming device 60 can form the base material layer by double-laminating forming film rolling. Specifically, the forming device 60 may include two rollers 61 arranged at intervals, and a forming film 62 respectively wound on the two rollers. The gap between the two rollers is set corresponding to the discharge port 51 of the feeding device, and the forming film 62 can be wound on the roller 61 and protruded from the roller 61 . In this embodiment, the forming film 62 protrudes from the roller shaft 61 along the direction away from the discharge port 51, so that the liquid TPU flowing in from between the two roller shafts 61 can be filled between the two forming films 62, and then Cooling and solidification forms the base material layer 321 with the molded film 62 attached to the upper and lower surfaces. It can be understood that the forming film 62 can be made of polyethylene terephthalate (polyethylene glycol terephthalate, PET), polycarbonate (Polycarbonate, PC) and other materials.

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 forming film 62 , based on this, the thickness of the substrate layer 321 is generally 100-300 μm. For example, the thickness of the substrate layer 321 may be 100 μm, 200 μm, 300 μm, or the like.

S602, forming a color layer on the base material layer. The forming film on one surface of the base layer is removed, and colored ink is printed on the surface of the base layer by printing to form a transparent or semi-transparent colored ink layer. Wherein, the color layer can be made to present a color pattern or a single color gradient pattern or a multi-color gradient pattern as required, and this embodiment does not limit the expression form of the specific pattern of the color layer. In one embodiment, the color layer can be directly printed on the surface of the substrate layer by lithographic printing, because the color layer formed by lithographic printing can be thinner than silk printing, and the surface is smoother and less rough. Small.

Of course, in other embodiments, the color layer can also be formed on the substrate layer by means of transfer, spraying, dipping, electroplating, coating, and the like.

In one embodiment, the thickness of the color layer is generally 5-30 μm. For example, the thickness of the color layer may be 7 μm, 10 μm, 14 μm, 15 μm, 20 μm, 21 μm, 28 μm, or the like.

S603, forming a texture layer on a side of the color layer away from the base layer, so as to form an appearance film.

Referring to Fig. 8 in combination, Fig. 8 is a schematic diagram of a process structure for forming a texture layer in some embodiments of the present application. Taking the texture layer made of transparent PU as an example, the method for forming the texture layer is roughly as follows:

The first step is to make transparent PU into a paste-like paste.

The second step is to provide a textured textured paper or textured sheet 70, and scrape-coat the transparent PU paste on the textured paper or textured sheet 70 to form a textured layer. It is understandable that multiple layers of transparent PU paste can be scratch-coated according to actual appearance requirements.

The third step is to press the TPU substrate layer on the transparent PU paste on the texture paper or texture sheet, so that the color layer and the PU paste are in contact with each other, and then bake to make the PU paste solidify so that the color layer deviates from the base layer. A texture layer is formed on one side of the material layer, and finally the texture paper or texture sheet is removed, that is, a texture is formed on the surface of the texture layer away 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 base layer by means of transfer printing, silk screen printing, or the like. Wherein, the surface of the texture layer facing away from the color layer forms a texture that penetrates or does not penetrate the texture layer toward the direction of the color layer.

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

Please refer to Fig. 9. Fig. 9 is a schematic flow chart of a manufacturing method of an appearance diaphragm in another embodiment of the present application. This manufacturing method can be used to manufacture the appearance diaphragm in the above embodiment. The manufacturing method may roughly include the following steps:

S901, providing a substrate layer, this step can refer to step S601, so it will not be described in detail.

S902, forming a color layer on the substrate layer, this step can refer to step S602, so it will not be described in detail.

S903, forming a protective layer on a side of the color layer away from the base layer. The ink added with ultraviolet absorber can be printed on the color layer by printing to form a protective layer capable of absorbing ultraviolet rays. In one embodiment, the protective layer can be printed on the color layer by lithographic printing, because the protective layer formed by lithographic printing can be thinner than silk printing, and the surface is smoother and less rough. Of course, in other embodiments, the protective layer can also be formed on the substrate layer by means of transfer, spraying, dipping, electroplating, coating, and the like.

In one embodiment, the protective layer generally has a thickness of 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.

S904, forming a texture layer and an appearance layer on a side of the protective layer away from the base layer, so as to form an appearance film. Wherein, the texture layer is arranged between the appearance layer and the protection layer.

Referring to Fig. 10 in combination, Fig. 10 is a schematic diagram of the process structure for forming the texture layer and the appearance layer in some embodiments of the present application. Taking the texture layer made of transparent PU and the appearance layer made of transparent PU as an example, the process of forming the texture layer and the appearance layer The method is roughly as follows:

The first step is to make transparent PU into a paste-like paste.

The second step is to divide the transparent PU paste into two parts, add a surface treatment agent to one part of the transparent PU paste, and stir evenly; the other part of the transparent PU paste does not add a surface treatment agent.

The third step is to provide a textured paper or textured sheet 70, and scrape-coat the transparent PU paste added with a surface treatment agent on the textured paper or textured sheet 70 to form an appearance layer.

The fourth step is to apply the transparent PU paste without surface treatment agent on the transparent PU paste with surface treatment agent to form a texture layer.

It can be understood that the transparent PU paste that has been added with a surface treatment agent can be multi-layered, and the transparent PU paste that has not been added with a surface treatment agent can be multi-layered with a knife, and is not specifically limited to this.

The fifth step is to laminate the TPU substrate layer on the transparent PU paste on the texture paper or texture sheet, so that the color layer is in contact with the PU paste without surface treatment agent, and then bake to make the PU paste solidify To form the texture layer and appearance layer, and finally remove the texture paper or texture sheet. Wherein, the transparent PU paste added with the surface treatment agent forms the appearance layer, and the transparent PU paste without the addition of the surface treatment agent forms the texture layer, and the appearance layer is arranged on the side of the texture layer away from the color layer.

It can be understood that, in this embodiment, texture is formed on the surface of the appearance layer away from the texture layer.

In one embodiment, the thickness of the appearance layer is generally 5-20 μm. For example, the thickness of the appearance layer may be 5 μm, 8 μm, 10 μm, 14 μm, 15 μm, 20 μm, etc.

It can be understood that the forming film on the side of the substrate layer away from the color layer can be removed before bonding the appearance film to the substrate, so as to avoid contamination of the bonding surface of the substrate layer on the substrate during the manufacturing process. Based on this, please refer to FIG. 11. FIG. 11 is a schematic flow chart of the manufacturing method of the housing in some embodiments of the present application. The manufacturing method may roughly include the following steps:

S1101. Provide an appearance film, the appearance film can be the appearance film in the above-mentioned embodiments, so it will not be described in detail.

S1102, providing a substrate, and affixing an appearance film on one side of the substrate. It can be understood that the appearance film can be bonded and fixed to the substrate by OCA, PSA, EVA and other colloids. Wherein, before the appearance film is bonded to the substrate, the forming film on the side of the base material layer away from the color layer is removed. In this embodiment, the side of the base material layer away from the color layer can be bonded and fixed to the substrate through colloids such as OCA, PSA, and EVA.

It should be noted that for the technical features not described in detail in the embodiments of the present application, reference may be made to the specific descriptions in the foregoing embodiments, so details are not described in this embodiment.

It should be noted that the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally further includes other steps or elements inherent in these processes, methods, products or arrangements.

The above descriptions are only part of the embodiments of the application, and are not intended to limit the scope of protection of the application. All equivalent devices or equivalent process transformations made by using the contents of the specification and drawings of the application, or directly or indirectly used in other related All technical fields are equally included in the patent protection scope of the present application.

Claims

A housing for electronic equipment, characterized in that the housing comprises:

substrate; and

Appearance diaphragm, the appearance diaphragm is arranged on one side of the substrate, and the appearance diaphragm includes:

A substrate layer, the substrate layer is made of polyurethane;

a color layer, the color layer is disposed on the substrate layer; and

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

Wherein, the texture layer is made of transparent polyurethane.
The casing according to claim 1, wherein a texture is formed on a surface of the texture layer facing away from the color layer.
The casing according to claim 1, wherein the casing further comprises a protective layer, and the protective layer is disposed between the color layer and the texture layer.
The casing according to claim 3, wherein the protective layer is made of transparent ink and added with an ultraviolet absorber capable of absorbing ultraviolet light.
The casing according to claim 1, wherein the casing further comprises an appearance layer, and the appearance layer is disposed on a side of the texture layer away from the base material layer.
The casing according to claim 5, wherein the appearance layer is made of transparent polyurethane material and added with a surface treatment agent.
The housing according to claim 1, wherein the substrate layer is made of polyester polyurethane, and the texture layer is made of polyester polyurethane.
The housing according to claim 7, wherein the base material layer is made of thermoplastic polyurethane elastomer.
The casing according to claim 1, wherein the casing further comprises an adhesive layer, and the adhesive layer is disposed between the substrate and the appearance film.
The casing according to claim 9, wherein the substrate includes a first surface and a second surface oppositely disposed, the first surface is the surface of the casing exposed to the electronic device, and the appearance film The substrate layer of the sheet is disposed on the first surface, and the color layer is disposed on a side of the substrate layer away from the first surface.
A method for manufacturing a shell, characterized in that the method includes:

Provide a substrate layer, the substrate layer is made of polyurethane;

forming a color layer on the substrate layer;

forming a texture layer on the side of the color layer away from the substrate layer to form an appearance film;

providing a substrate, and disposing the appearance film on one side of the substrate;

Wherein, the texture layer is made of transparent polyurethane.
The manufacturing method according to claim 11, characterized in that, the base material layer is formed by double pasting forming film rolling.
The manufacturing method according to claim 12, characterized in that, the step of forming the base material layer comprises: melting the thermoplastic polyurethane elastomer into a liquid state, injecting the liquid thermoplastic polyurethane elastomer into the feeding device and feeding it along the feeding device. The liquid thermoplastic polyurethane elastomer flowing out from the discharge port flows into the forming device, and the forming device adopts the method of double pasting forming film rolling to form the base material layer.
The manufacturing method according to claim 11, characterized in that, the color layer is directly formed on the substrate layer by lithography.
The manufacturing method according to claim 11, characterized in that, the step of forming the texture layer comprises: making a paste-like paste from transparent polyurethane, and providing textured paper or a textured sheet, and applying the paste Scratch coating on the textured paper or the textured sheet; placing the substrate layer on the paste, so that the color layer and the ester paste are in contact and pressed together, and baked to make the paste curing to form the texture layer on a side of the color layer facing away from the substrate layer.
The manufacturing method according to claim 11, wherein the step of forming the texture layer further comprises: forming an appearance layer on a side of the texture layer away from the color layer.
The manufacturing method according to claim 16, wherein the step of forming the appearance layer and the texture layer comprises:

Making a paste-like paste from the transparent polyurethane material, and dividing the paste into two parts; adding a surface treatment agent to one of the pastes and stirring evenly;

providing a textured textured paper or textured sheet, and scraping a portion of the paste added with a surface treatment agent on the textured paper or textured sheet to form the appearance layer;

Squeegee coating the paste without adding surface treatment agent on the appearance layer to form the texture layer.
The manufacturing method according to claim 11, further comprising: forming a protective layer on a side of the color layer away from the base layer after forming the color layer on the base material layer.
An electronic device, characterized in that the electronic device comprises:

a display screen and a middle frame, the display screen is connected to one side of the middle frame;

a casing, the casing is connected to the other opposite side of the middle frame; the casing includes a substrate and an appearance diaphragm, and the appearance diaphragm is arranged on one side of the substrate,

Wherein, the appearance film includes a substrate layer, a color layer and a texture layer, the substrate layer is made of polyurethane; the color layer is arranged on the substrate layer; the texture layer is arranged on the color The side of the layer facing away from the substrate layer; the texture layer is made of transparent polyurethane.
The electronic device according to claim 19, wherein the substrate has a first surface, and the first surface is a surface of the substrate away from the display screen; the base material layer is arranged on the first surface On the surface, the color layer is disposed on a side of the base material layer away from the first surface.