Shell, electronic equipment and manufacturing method of shell

Abstract

The invention discloses a shell, electronic equipment and a manufacturing method of the shell, and relates to the technical field of electronic equipment. The shell comprises a substrate, a first texture layer, a first coating layer, a first adhesive layer, an acetic acid membrane, a second texture layer and a second coating layer. Wherein the first texture layer is arranged on the substrate; the first coating layer is arranged on the side, away from the substrate, of the first texture layer; the first adhesive layer is arranged on the side, away from the first texture layer, of the first coating layer; the acetic acid membrane is arranged on one side, far away from the first coating layer, of the first adhesive layer; the second texture layer is arranged on the side, away from the first adhesive layer, of the acetic acid membrane; the second coating layer is arranged on the side, away from the acetic acid membrane, of the second texture layer.

Description

Technical Field

[0001] The present application belongs to the technical field of electronic equipment, and specifically relates to a housing, an electronic device, and a method for manufacturing the housing. Background Art

[0002] In the related art, the mobile phone shell includes an acetate film, which has a unique grain effect and texture pattern. The use of the acetate film in the mobile phone shell can greatly enhance the diversity of the mobile phone appearance design. However, in the production process of the mobile phone shell, the acetate film is first filled with resin on the surface, and then bonded to the substrate by optically clear adhesive (OCA) and film. However, the appearance of the mobile phone shell with this structure is single, which leads to the homogenization of the appearance of the mobile phone. Summary of the invention

[0003] The present application aims to provide a housing, an electronic device and a method for manufacturing the housing, which at least solves one of the problems that the appearance of mobile phone housings is single, thereby leading to homogeneity of the appearance of mobile phones.

[0004] In order to solve the above technical problems, this application is implemented as follows:

[0005] In a first aspect, the present application proposes a housing, comprising a substrate, a first texture layer, a first coating layer, a first adhesive layer, an acetate film, a second texture layer, and a second coating layer. The first texture layer is disposed on the substrate; the first coating layer is disposed on a side of the first texture layer away from the substrate; the first adhesive layer is disposed on a side of the first coating layer away from the first texture layer; the acetate film is disposed on a side of the first adhesive layer away from the first coating layer; the second texture layer is disposed on a side of the acetate film away from the first adhesive layer; and the second coating layer is disposed on a side of the second texture layer away from the acetate film.

[0006] In a second aspect, the present application proposes an electronic device, comprising a housing according to the above technical solution.

[0007] In the third aspect, the present application proposes a method for manufacturing a shell, which includes: transferring a first texture layer on one side of a composite sheet, the composite sheet including a plurality of substrates arranged in parallel; performing an optical coating treatment on the first texture layer to form a first coating layer on the surface of the first texture layer; laminating a first adhesive layer on the first coating layer; laminating an acetate film sheet to the first adhesive layer; transferring a second texture layer on the acetate film sheet; performing an optical coating treatment on the second texture layer to form a second coating layer; molding the composite sheet; and cutting the molded composite sheet based on the arrangement of the substrates to obtain a shell.

[0008] The shell, electronic device and shell manufacturing method provided in the present application, through the coordination of the first texture layer, the first coating layer, the second texture layer and the second coating layer, enable the texture of the shell to have more arrangement methods, thereby enriching the types and styles of patterns on the shell, and solving the technical problem of the single appearance of the shell, which leads to the homogenization of the appearance of the electronic device.

[0009] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0011] Figure 1 is one of the schematic diagrams of the shell stack according to an embodiment of the present application;

[0012] Figure 2 is a second schematic diagram of a shell stack according to an embodiment of the present application;

[0013] Figure 3 is a schematic diagram of an arrangement of acetate membrane sheets on an acetate membrane sheet according to an embodiment of the present application;

[0014] Figure 4 is a schematic diagram of a silk screen positioning line according to an embodiment of the present application;

[0015] Figure 5 is a schematic diagram of a first texture layer according to an embodiment of the present application;

[0016] Figure 6 is a schematic diagram of a first coating layer according to an embodiment of the present application;

[0017] Figure 7 is a schematic diagram of a silk-screen varnish layer according to an embodiment of the present application;

[0018] Figure 8 is a schematic diagram of laminating an acetate film according to an embodiment of the present application;

[0019] Fig. 9 is a schematic diagram of a laminated waterproof membrane or waterproof adhesive layer according to an embodiment of the present application;

[0020] Fig.10 is a schematic diagram of a second texture layer according to an embodiment of the present application;

[0021] Fig.11 is a schematic diagram of a second coating layer according to an embodiment of the present application;

[0022] Fig.12is a schematic diagram of a silk-screen ink layer according to an embodiment of the present application;

[0023] Fig.13 It is a schematic diagram of the shell manufacturing process according to an embodiment of the present application.

[0024] Reference numerals:

[0025] 100 shell, 102 substrate, 110 first texture layer, 120 first coating layer, 130 first adhesive layer, 140 acetate membrane, 150 second coating layer, 160 waterproof layer, 162 second adhesive layer, 164 waterproof membrane, 166 waterproof adhesive layer, 170 second texture layer, 180 silk screen varnish layer, 190 silk screen ink layer, 200 coating layer, 400 composite board material, 500 acetate membrane board material, 600 silk screen positioning line. DETAILED DESCRIPTION

[0026] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0027] Combine the following Figures 1 to 13 A housing, an electronic device and a method for manufacturing the housing according to an embodiment of the present application are described.

[0028] According to some embodiments of the present application, Figure 1 and Figure 2 As shown, a housing 100 is provided, comprising a substrate 102, a first texture layer 110, a first coating layer 120, a first adhesive layer 130, an acetate film 140, a second texture layer 170 and a second coating layer 150. The first texture layer 110 is disposed on the substrate 102; the first coating layer 120 is disposed on a side of the first texture layer 110 away from the substrate 102; the first adhesive layer 130 is disposed on a side of the first coating layer 120 away from the first texture layer 110; the acetate film 140 is disposed on a side of the first adhesive layer 130 away from the first coating layer 120; the second texture layer 170 is disposed on a side of the acetate film 140 away from the first adhesive layer 130; and the second coating layer 150 is disposed on a side of the second texture layer 170 away from the acetate film 140.

[0029] The present application proposes a housing 100, which includes a substrate 102, a first texture layer 110, a first coating layer 120, a first adhesive layer 130, an acetate film 140, a second texture layer 170 and a second coating layer 150. The first texture layer 110 is disposed on the substrate 102, and an industrial design texture effect is achieved by transferring the texture of the first texture layer 110. The first coating layer 120 is disposed on a side of the first texture layer 110 away from the substrate 102, and an optical color adjustment and brightening effect is achieved by the first coating layer 120, so that the housing 100 has a rich gloss and texture. The first adhesive layer 130 is disposed on a side of the first coating layer 120 away from the first texture layer 110, and the acetate film 140 is disposed on a side of the first adhesive layer 130 away from the first coating layer 120. The bite force of the first adhesive layer 130 on the first coating layer 120 is used to ensure the bonding force of the acetate film 140 and avoid the risk of separation of the process layer. At the same time, the first adhesive layer 130 has good waterproofness and can alleviate the acetate film 140 from absorbing moisture in the air. The second texture layer 170 is arranged on the side of the acetate film 140 away from the first adhesive layer 130, and the second coating layer 150 is arranged on the side of the second texture layer 170 away from the acetate film 140. The second texture layer 170 and the second coating layer 150 achieve multi-layer texture transfer, optical color adjustment and brightening effects, so that the housing 100 has rich patterns, gloss and texture. Through the cooperation of the first texture layer 110, the first coating layer 120, the second texture layer 170 and the second coating layer 150, a double-texture double-plating effect is achieved, so that the texture of the housing 100 has more arrangement methods, thereby enriching the types and styles of patterns on the housing 100, solving the technical problem that the appearance of the housing 100 is single, thereby leading to the homogeneity of the appearance of electronic devices.

[0030] The shell 100 defined in the present application achieves the unique texture effect of the texture layer transfer texture and the acetate film 140, as well as the appearance effect of mutual contrast, by laminating the acetate film 140, the texture layer transfer texture and the coating layer on the surface of the substrate 102. At the same time, the shell 100 of the present application adopts the first adhesive layer 130 transfer technology to directly roll and laminate the acetate film 140 and the substrate 102, thereby solving the problems of unevenness, warping, and bulging of the acetate film 140. The first adhesive layer 130 is used to replace the optical transparent adhesive coating and adhesive layer bonding method to achieve efficient lamination of the acetate film 140, simplify the bonding and laminating process in the production process of the shell 100, and improve the production efficiency of the shell 100.

[0031] Furthermore, the substrate 102 is a portion of the cut composite board 400, the first texture layer 110 is a texture layer transferred by ultraviolet rays (UV), the first coating layer 120 is an optical coating, the first adhesive layer 130 is a UV bonding adhesive, and the second coating layer 150 is an optical coating.

[0032] Furthermore, the shell 100 of the present application adopts the many-to-many large-sheet UV laminating adhesive transfer technology to directly roll and laminate a large sheet of acetate film 140 to the substrate, thereby solving the problems that affect the feasibility of the many-to-many large-sheet laminating process (uneven laminating, warping, bulging, etc. of large sheets), and uses the transfer UV laminating adhesive method to replace the optical transparent adhesive coating and adhesive layer bonding method to achieve efficient laminating of the acetate film 140.

[0033] Among them, the size of the acetic acid film 140 is relatively large, such as 1050×430mm. The size of the composite board 400 needs to be confirmed according to the size of the acetic acid film 140. If a single-sticking method is used, the size design reserves the spacing and waste discharge area, then one acetic acid film 140 can only process 12 products, and the multi-to-multi UV bonding adhesive transfer method is used, such as Figure 3 As shown, according to the size design of the three-dimensional high-pressure structure of the composite plate 400, the size of an acetate membrane plate 500 is 430×1050 mm, and the acetate membrane plate 500 can be arranged with 20 acetate membranes 140, which greatly improves the utilization rate of the acetate membrane 140 and saves the cost of raw materials. Figure 3 As shown, if the size of the acetate film sheet 500 is 425×450 mm, it can be produced by 1 / 8 size layout, that is, the acetate film sheet 500 can be arranged with 8 acetate films 140. Figure 3 As shown, if the size of the acetate film raw material is 425×225 mm, 1 / 4 size layout can be performed for production, that is, the acetate film plate 500 can be arranged with 4 acetate films 140.

[0034] Furthermore, the UV laminating adhesive is a key material for firmly laminating the acetate film 140 with a substrate, such as a polycarbonate (PC) sheet or a composite sheet 400. The laminating is efficient, there is no warping and bulging problem caused by laminating large sheets of sheet material, and the performance is stable. The bonding mechanism of the UV laminating adhesive and the acetate film 140 is that the UV-cured laminating adhesive is modified to make it cure quickly in the deep layer, and after curing, a hard and sticky adhesive layer is formed, which has efficient bonding ability and high temperature resistance.

[0035] Furthermore, the bonding principle of the UV adhesive and the acetate film 140 is as follows: the active groups (ester and carboxyl groups) in the adhesive can combine with various functional groups (hydroxyl and carboxyl groups) on the surface of the acetate film 140 to form chemical bonds and physical bonds, thereby increasing the strength of the bond. There are two forms of bonding: one is chemical bonding, that is, the active groups of the adhesive react chemically with the functional groups on the surface of the acetate film (such as ester exchange and condensation reaction) to form chemical bonds; the other is physical bonding, that is, the active groups of the adhesive and the functional groups on the surface of the acetate film attract each other through interaction forces such as van der Waals force and electrostatic force to form physical bonds. The second is interfacial diffusion: after the adhesive is transferred to the surface of the acetate film 140, it will penetrate into the interior of the acetate film through diffusion, and can bring the active groups into the tiny pores on the surface of the acetate film, increase the bonding surface area and contact points, and thus improve the bonding strength.

[0036] At the same time, the shell 100 of the present application is superimposed with multiple layers of UV texture and coating effects, and utilizes the method of bonding the acetate film 140 with stable bonding performance and the composite board 400, so that the shell 100 has both excellent appearance effect and stable reliability, thereby enhancing the value and competitiveness of the shell 100 product.

[0037] Specifically, Figure 4 and Figure 5 As shown, a screen printing positioning line 600 is drawn on the composite board 400, and then the composite board 400 is divided into a plurality of substrates 102, and the first texture layer 110 is transferred on one side of each substrate 102 according to the screen printing positioning line 600; Figure 6 As shown, an optical coating process is performed on the first texture layer 110 to form a first coating layer 120 on the surface of the first texture layer 110; Figure 8 As shown, a first adhesive layer 130 is attached to the first coating layer 120; an acetate film 140 is attached to the first adhesive layer 130; Fig.11 As shown, an optical coating process is performed on the side of the acetate film 140 away from the first adhesive layer 130 to form a second coating layer 150; the composite board 400 is molded at a first temperature and a first pressure; and the molded composite board 400 is cut to obtain a shell 100.

[0038] According to some embodiments of the present application, optionally, Figure 2 As shown, the second texture layer 170 is the waterproof adhesive layer 166 .

[0039] In this embodiment, the waterproof adhesive layer 166 is disposed between the acetate film 140 and the second coating layer 150. Specifically, the waterproof adhesive layer 166 is a transfer UV waterproof adhesive. The UV waterproof adhesive is transferred by a transfer machine roller and quickly cured by LED to form a dense cross-linked network structure. While achieving texture transfer, the acetate film 140 is waterproofed, the acetate film 140 is reduced to absorb moisture in the air, and the probability of deformation and wrinkling of the acetate film 140 is reduced.

[0040] Furthermore, the shell 100 defined in the present application adopts a transfer UV waterproof glue solution, which not only reduces costs but also reduces product thickness, meets waterproof performance requirements, solves problems such as stratification, bubbling, and degumming of the acetate film 140, and enables the product to have excellent waterproof and moisture-resistant properties.

[0041] According to some embodiments of the present application, optionally, Figure 1 As shown, the shell 100 also includes a second adhesive layer 162 and a waterproof membrane 164, wherein the second adhesive layer 162 is arranged on the side of the acetate membrane 140 away from the first adhesive layer 130; the waterproof membrane 164 is attached to the side of the second adhesive layer 162 away from the acetate membrane 140, and the second texture layer 170 is arranged on the side of the waterproof membrane 164 away from the second adhesive layer 162.

[0042] In this embodiment, the second adhesive layer 162 is disposed on the side of the acetate film 140 away from the first adhesive layer 130, and the waterproof film 164 is attached to the side of the second adhesive layer 162 away from the acetate film 140. The waterproof layer 160 protects the acetate film 140, reduces the absorption of moisture in the air by the acetate film 140, and reduces the probability of deformation and wrinkling of the acetate film 140. At the same time, because the surface of the acetate film 140 is uneven, a thicker second adhesive layer 162 is required to be attached to fill the gap of the acetate film 140 to improve the attachment performance, and then the waterproof film 164 and the second texture layer 170 are attached, so that the acetate film 140 is protected by a multi-layer structure.

[0043] Specifically, the second adhesive layer 162 is UV adhesive, and the waterproof film 164 is a polycarbonate film.

[0044] Furthermore, the waterproof mechanism of the PC membrane bonding solution is mainly related to the molecular structure and physical properties of its materials. The chemical structure of polycarbonate contains carbonate groups (-O-(C=O)-O-) and long-chain aromatic ring structures. These structural units make the PC membrane have a high degree of molecular chain rigidity and structural density. There are more carbon-oxygen double bonds (C=O) and carbon-oxygen single bonds (CO) in the molecular structure of the PC membrane. These chemical bonds are polar to a certain extent. Water molecules cannot easily pass through the densely arranged molecules of the PC membrane, forming an effective physical barrier, making the PC membrane exhibit excellent hydrophobicity; at the same time, the surface energy of the PC membrane is low, and then water molecules on the surface of the PC membrane are more inclined to form a high contact angle shape rather than spread out. This high contact angle prevents water droplets from spreading and penetrating on the surface, forming a layer of surface protection. However, the physical thickness of the PC diaphragm solution (PC diaphragm thickness is 0.1mm, bonding glue thickness is 0.03mm) causes the entire product to be thicker. Therefore, further optimization can use the UV waterproof glue solution (UV waterproof glue thickness is 0.03mm) to make up for the shortcomings of this solution.

[0045] Furthermore, the shell 100 defined in the application adopts a solution of bonding PC film, which not only reduces the cost, but also reduces the thickness of the product, meets the waterproof performance requirements, solves the problems of stratification, bubbling, and degumming of the acetate film 140, and enables the product to have excellent waterproof and moisture-resistant properties.

[0046] Furthermore, the second adhesive layer 162 , the waterproof membrane 164 and the second texture layer 170 constitute a waterproof layer 160 .

[0047] like Fig. 9 and Fig.10 As shown, a second adhesive layer 162 is attached to a side of the acetate film 140 away from the first texture layer 110 ; a waterproof film 164 is attached to the second adhesive layer 162 , and a second texture layer 170 is transferred onto the waterproof film 164 .

[0048] According to some embodiments of the present application, optionally, Figure 1 and Fig.10 As shown, the second texture layer 170 is disposed between the waterproof membrane 164 and the second coating layer 150. After the shell 100 transfers the texture through the first texture layer 110, the texture is transferred through the second texture layer 170, further achieving the effect of ID design texture.

[0049] Specifically, the second texture layer 170 is UV transfer, and a layer of UV glue is transferred on the surface of the substrate 102 by roller transfer. The UV glue can transfer special texture effects (such as photolithography texture, machined texture, etching texture, etc.) through the texture sub-mold, and is cured by the light emitting diode (LED, Light Emitting Diode) lamp on the transfer machine to form a rich texture effect.

[0050] Furthermore, the shell 100 defined in the present application realizes a double-texture and double-plating effect by transferring UV texture and optical coating on the inner surface of the composite sheet 400 and the surface of the acetate film 140, thereby realizing the appearance effect of a double-texture and double-plating 3D modeling composite sheet 400 and the acetate film 140 superimposed, and solving the problem of the single appearance of the acetate film 140.

[0051] Furthermore, the shell 100 defined in the present application adopts a multi-to-multi large-sheet UV laminating adhesive transfer technology to directly roll-press a large sheet of acetate film 140 and a substrate in one step, eliminating the cumbersome steps of resin filling, multiple bonding, and single-sheet laminating in the traditional process, greatly improving production efficiency and product stability. The composite plate 400 and the acetate film 140 are efficiently laminated, solving the cumbersome and unstable performance problems of the traditional single-sheet laminating process of the acetate film 140, and breaking through the traditional single-sheet laminating process.

[0052] According to some embodiments of the present application, optionally, in terms of weight, the components of the waterproof adhesive layer 166 include 35 to 45 parts of modified acrylic monomers; 20 to 30 parts of polyacrylic acid oligomers; 20 to 30 parts of trifunctional polyacrylic resins; 5 to 10 parts of nonafunctional polyacrylic resins. The components of the waterproof adhesive layer 166 also include 2 to 3 parts of photoinitiators; and 0.5 to 1 part of auxiliary agents.

[0053] In this embodiment, the components of the waterproof adhesive layer 166 include 35 to 45 parts of modified acrylic monomers, 20 to 30 parts of polyacrylic acid oligomers, 20 to 30 parts of trifunctional polyacrylic resins, 5 to 10 parts of nonafunctional polyacrylic resins, 2 to 3 parts of photoinitiators, and 0.5 to 1 part of auxiliary agents, by weight. The main function of the UV waterproof adhesive is to provide excellent waterproof performance, form a dense three-dimensional cross-linked structure through ultraviolet light curing, and protect the acetate film 140 from moisture. Its waterproof mechanism is mainly brought about by its high-density three-dimensional cross-linked network and surface chemical inertness. During the UV curing process, acrylate monomers and oligomers are cross-linked through double bond polymerization to form a dense three-dimensional cross-linked network. The high cross-linking density makes the gaps between the molecular chains of the material very small, hindering the passage of water molecules; the hydrophobic acrylate monomers (fluorine-containing and silicon-containing monomers) in the UV waterproof glue form hydrophobic groups (such as -CF3, -CH3, -Si(CH3)3) on the surface of the glue layer after polymerization. These hydrophobic groups reduce the surface energy, so that water forms a high contact angle on the surface of the glue layer, thereby showing hydrophobicity, but the hydrophobicity cannot be too strong to avoid poor adhesion in the subsequent process. Therefore, it is particularly critical to adjust the proportion of the resin formula.

[0054] Specifically, the transfer UV waterproof glue is composed of modified acrylic monomer, polyacrylic oligomer, trifunctional polyacrylic resin, nonafunctional polyacrylic resin, photoinitiator, and auxiliary agent, wherein the ratio of modified acrylic monomer, polyacrylic oligomer, trifunctional polyacrylic resin, nonafunctional polyacrylic resin, photoinitiator, and auxiliary agent is 40 parts: 30 parts: 20 parts: 10 parts: 2 parts: 1 part, wherein the modified acrylic monomer comprises one or more of perfluorooctyl methacrylate and trimethoxysilane methacrylate, wherein the polyacrylic oligomer comprises one or more of modified polycarbonate acrylate oligomer and ethoxylated acrylate oligomer, wherein the trifunctional polyacrylic resin is trihydroxypropyl acrylate, wherein the nonafunctional polyacrylic resin is polyethylene glycol diacrylate (PEGDA), wherein the photoinitiator comprises an initiator and a thermoplastic polyolefin (TPO, Thermoplastic Polyolefin) The invention relates to a novel photoinitiator comprising one or more of a polyolefin) initiator, wherein the auxiliary agent comprises one or more of a leveling agent polydimethylsiloxane (PDMS), a wetting agent polyvinyl alcohol (PVA), a light stabilizer, and a defoaming agent fumed silica. Specifically, the ratio of modified acrylic monomer, polyacrylic oligomer, trifunctional polyacrylic resin, nonafunctional polyacrylic resin, photoinitiator, and auxiliary agent can also be 35 parts: 20 parts: 20 parts: 5 parts: 2 parts: 0.5 parts; the ratio of modified acrylic monomer, polyacrylic oligomer, trifunctional polyacrylic resin, nonafunctional polyacrylic resin, photoinitiator, and auxiliary agent can also be 45 parts: 30 parts: 30 parts: 10 parts: 3 parts: 1 part.

[0055] Furthermore, the monomers and resins in the UV waterproof glue are both fluorine / silicon modified acrylics with low surface energy and good waterproof performance. The resins selected are highly functional, and the high functionality can form a highly dense three-dimensional molecular network structure, thereby improving the waterproof performance, mechanical strength and chemical durability of the glue. The use of high cross-linking density, multi-functional resins and fluorine / silicon-containing monomers ensures the hydrophobicity and physical barrier properties of the glue layer. At the same time, polycarbonate acrylate oligomers are added to improve the overall flexibility, so that it has both excellent performance and post-processing feasibility; the high cross-linking density results in a large glue modulus (300MPa to 500MPa). In order to ensure the toughness and bonding performance of the glue, the monomer ratio is relatively high, so the viscosity of the glue is between 1000cPs and 2000cPs.

[0056] According to some embodiments of the present application, optionally, in terms of weight, the components of the first adhesive layer 130 include 30 to 40 parts of acrylic monomers; 35 to 45 parts of polyacrylic acid oligomers; 10 to 20 parts of difunctional polyacrylic resins; 8 to 10 parts of octafunctional polyacrylic resins. The components of the first adhesive layer 130 also include 2 to 3 parts of photoinitiators; and 0.5 to 1 part of auxiliary agents.

[0057] In this embodiment, the components of the first adhesive layer 130 include 30 to 40 parts of acrylic monomers, 35 to 45 parts of polyacrylic acid oligomers, 10 to 20 parts of difunctional polyacrylic resins, 8 to 10 parts of octafunctional polyacrylic resins, 2 to 3 parts of photoinitiators, and 0.5 to 1 part of additives, in terms of weight. The monomers and resins in the UV bonding adhesive are both acrylics. Acrylic resins generally have good waterproof properties and are widely used in coating adhesives and sealing materials. In order to make it have high-strength bonding and excellent bonding and adhesion properties, a resin with a larger molecular chain is selected. The larger the molecular chain, the better the toughness and bonding properties of the glue after curing, and the higher the viscosity of the glue (3000cPs to 5000cPs). The higher viscosity can effectively fill the uneven areas on the surface of the acetate film 140. If there are more monomers (small molecular chains) in the bonding adhesive, the viscosity is low and the relative wettability is good, but the corrosion to the acetate film is stronger, the pattern effect is affected, and the acetate film will be corroded and delaminated.

[0058] Specifically, the UV bonding adhesive material is composed of acrylic monomer, polyacrylic oligomer, difunctional polyacrylic resin, octafunctional polyacrylic resin, photoinitiator, and auxiliary agent, wherein the ratio of acrylic monomer, polyacrylic oligomer, difunctional polyacrylic resin, octafunctional polyacrylic resin, photoinitiator, and auxiliary agent is 30 parts: 40 parts: 20 parts: 10 parts: 2 parts: 1 part. The acrylic monomer includes one or more of methyl methacrylate, butyl acrylate, and ethylene glycol methacrylate, the polyacrylic oligomer includes one or more of modified polyurethane acrylate oligomers and epoxy acrylate oligomers, the difunctional polyacrylic resin includes one or more of isocyanate acrylate and bisphenol diacrylate, the octafunctional polyacrylic resin includes one or more of octafunctional modified polyurethane acrylate and octafunctional modified epoxy acrylate, the photoinitiator includes one or more of initiator and TPO initiator, and the auxiliary agent includes one or more of dispersant, antioxidant, and ultraviolet absorber. Specifically, the ratio of acrylic acid monomer, polyacrylic acid oligomer, difunctional polyacrylic resin, octafunctional polyacrylic resin, photoinitiator, and auxiliary agent can also be 30 parts: 35 parts: 10 parts: 8 parts: 2 parts: 0.5 parts; the ratio of acrylic acid monomer, polyacrylic acid oligomer, difunctional polyacrylic resin, octafunctional polyacrylic resin, photoinitiator, and auxiliary agent can also be 40 parts: 45 parts: 20 parts: 10 parts: 3 parts: 1 part.

[0059] According to some embodiments of the present application, optionally, Figure 1 , Figure 2 and Figure 7 As shown, the housing 100 further includes a silk screen varnish layer 180 and a silk screen ink layer 190. The silk screen varnish layer 180 is disposed between the first coating layer 120 and the first adhesive layer 130; the silk screen ink layer 190 is disposed on a side of the second coating layer 150 away from the acetate film 140.

[0060] In this embodiment, the housing 100 further includes a silk screen varnish layer 180 and a silk screen ink layer 190. The silk screen varnish layer 180 is disposed between the first coating layer 120 and the first adhesive layer 130. The silk screen ink layer 190 ensures that the housing 100 has qualified performance, protects the upper process treatment layer, and plays a role in weather resistance and waterproofing. The silk screen ink layer 190 is disposed on the side of the second coating layer 150 away from the acetate film 140. The silk screen ink layer 190 is used for color adjustment, and different color effects are adjusted according to design requirements to meet the appearance effect requirements.

[0061] Specifically, the printed varnish layer is a transparent varnish layer that is screen-printed after the optical coating layer to protect the coating layer from oxidation and damage. At the same time, the varnish layer can increase the adhesion of the subsequent UV bonding adhesive, and has both the protection of the upper coating layer and the enhanced bonding force of the lower UV bonding adhesive, ensuring that the test performance is qualified. Specifically, the ink thickness is 3um to 5um, the screen mesh number is 250 to 350 mesh, the baking temperature is 80°C, and the baking time is 30 minutes. The screen-printed varnish layer 180 ensures qualified performance and protects the upper coating process layer. At the same time, the screen-printed varnish layer 180 enhances the bite force of the UV bonding adhesive on the coating layer, ensures the bonding force of the acetate film 140, and avoids the risk of separation of the process layer.

[0062] Furthermore, the silk-screen ink layer 190 is a five-layer silk-screen ink on the inner surface, which mainly plays the role of color effect adjustment, weather resistance and waterproofing, ensuring the appearance effect and test performance are qualified. Specifically, the ink thickness is 50um to 60um, the baking temperature of each layer is 80℃, and the baking time of each layer is 60min. The silk-screen ink layer 190 ensures qualified performance, protects the upper process treatment layer, and plays a role of weather resistance and waterproofing; at the same time, the silk-screen ink layer 190 is used for color adjustment, and different color effects are adjusted according to design requirements to meet the appearance effect requirements.

[0063] According to some embodiments of the present application, optionally, Figure 1 and Figure 2 As shown, the housing 100 further includes a coating layer 200 . The coating layer 200 is disposed on the substrate 102 and is located at a side away from the first texture layer 110 .

[0064] In this embodiment, the housing 100 further includes a coating layer 200, which is disposed on the substrate 102 and located on a side away from the first texture layer 110. The coating layer 200 can protect the surface of the substrate 102 from wear, hardness, and weathering.

[0065] Specifically, a layer of high-gloss coating liquid is coated on the outer surface of the composite board 400 through a coating process to achieve a high-gloss reflective appearance and harden the surface of the board to ensure hardness and wear resistance; the coating baking temperature is 60°C to 70°C, the baking time is 10min to 15min, the film thickness is 5um to 10um, and the LED lamp curing energy is 500mJ / cm 2 Up to 800mJ / cm 2 The surface coating high gloss layer can protect the surface of the composite board 400 from wear, hardness and weathering; the coating layer 200 enhances the reflectivity of the outer surface of the composite board 400 and achieves a high-gloss mirror reflection effect.

[0066] The present application proposes an electronic device, comprising a housing 100 as in any one of the above technical solutions. Therefore, the electronic device has all the beneficial effects of the housing 100 as in any one of the above technical solutions.

[0067] This application proposes a method for manufacturing a housing, such as Fig.13 As shown, the method for manufacturing the housing includes:

[0068] Step 102: transferring a first texture layer on one side of a composite board, wherein the composite board includes a plurality of substrates arranged in parallel;

[0069] Step 104: performing an optical coating process on the first texture layer to form a first coating layer on the surface of the first texture layer;

[0070] Step 106: Laminating a first adhesive layer on the first coating layer;

[0071] Step 108: Laminating the acetate film to the first adhesive layer;

[0072] Step 110: transferring a second texture layer onto the acetate film;

[0073] Step 112: performing optical coating treatment on the second texture layer to form a second coating layer;

[0074] Step 114: forming the composite sheet;

[0075] Step 116: Based on the arrangement of the substrate, the formed composite plate is cut to obtain a shell.

[0076] In this embodiment, a first texture layer is transferred to one side of the composite board, and an optical coating treatment is performed on the first texture layer to form a first coating layer on the surface of the first texture layer; an acetate film is attached to the first adhesive layer; a second texture layer is transferred to the acetate film, and an optical coating treatment is performed on the second texture layer to form a second coating layer; through the coordination of the first texture layer, the first coating layer, the second texture layer and the second coating layer, a double-texture and double-plating effect is achieved, so that the texture of the shell has more arrangement methods, thereby enriching the types and styles of patterns on the shell, solving the technical problem that the appearance of the shell is single, thereby leading to the homogenization of the appearance of electronic equipment.

[0077] The composite sheet is formed, and based on the arrangement of the substrate, the formed composite sheet is cut to obtain a shell. The direction of the acetate film bonding is Figure 8 The direction indicated by arrow A.

[0078] Specifically, a layer of UV glue is transferred on the inner surface of the composite board by roller transfer. The UV glue transfers special texture effects (such as photolithography texture, machined texture, etching texture, etc.) through the texture sub-mold, and is cured by the LED light on the transfer machine to form a rich texture effect; the viscosity of the transfer glue is 300cPs to 500cPs, the glue film thickness is 10um to 15um, the roller pressure is 5kg to 6kg, the roller speed is 40mm / s to 60mm / s, and the LED lamp curing energy is 1000mJ / cm 2 Up to 1800mJ / cm 2 ; Achieve ID design texture effect through UV glue transfer texture method.

[0079] Furthermore, by performing an optical coating process on the inner surface, an optical color adjustment and brightening effect is achieved, so that the shell has rich colors and glossiness; the optical coating layer is attached to the transfer glue layer by an electron gun coating device, and the optical coating layer is composed of two or more of silicon oxide, titanium oxide, silicon aluminum oxide, etc., and the film thickness is between 100nm and 500nm, and the coating background vacuum is 3×10 -5 Pa to 5×10 -5 Pa, the vacuum degree of the coating process is 5.0×10 -5 Pa to 9.0×10 -5 Pa. The inner surface optical coating achieves optical color adjustment and brightening effects, giving the shell a rich gloss and texture.

[0080] Furthermore, by using a transfer machine to transfer UV bonding glue, the surface is covered with an acetic acid film, and a roller is used to roll the UV glue, so that the glue can infiltrate the surface of the acetic acid film and fill the uneven area on the surface of the acetic acid film to enhance its bonding strength, and then the LED is quickly cured to form a strong bond. The raw material thickness of the acetic acid film is 0.05mm to 0.07mm, the viscosity of the UV bonding glue is 3000cPs to 5000cPs, the film thickness is 20um to 30um, the roller pressure is 3kg to 5kg, the roller speed ratio is 13% to 15%, the roller hardness is 75A, and the LED curing energy is 600mJ / cm 2 Up to 800mJ / cm 2 , the curing energy of the two-solid mercury lamp is 1000mJ / cm 2 Up to 1500mJ / cm 2 The first adhesive layer 130 is used as a bonding adhesive, which has excellent adhesion, weather resistance and yellowing resistance, and can achieve multi-to-multi large-sheet bonding, ensuring the adhesion of the acetate film and ensuring qualified performance; the bonding adhesive is UV curable and can be quickly cured to ensure production efficiency; because the surface of the acetate film is uneven, a thicker glue film thickness (glue film thickness is 20um to 30um) is required to bond, fill the gap between the acetate film and improve the bonding performance, and then bond the PC film or transfer waterproof glue to achieve a sandwich structure to protect the acetate film.

[0081] Furthermore, by performing optical coating process on the inner surface, optical color adjustment and brightening effects are further achieved, so that the shell has rich colors and glossiness; the optical coating layer is attached to the transfer glue layer by electron gun coating equipment, and the optical coating layer is composed of two or more of silicon oxide, titanium oxide, silicon aluminum oxide, etc., and the film thickness is between 100nm and 500nm, and the coating background vacuum is 3×10 -5 Pa to 5×10 -5 Pa, the vacuum degree of the coating process is 5.0×10 - 5 Pa to 9.0×10 -5 Pa. The inner surface optical coating achieves optical color adjustment and brightening effects, further giving the shell a rich gloss and texture.

[0082] Furthermore, the surface of the composite sheet is softened by high pressure and high temperature forming to achieve the 3D effect of the composite sheet modeling, wherein the high pressure forming temperature is 300°C to 400°C, the high pressure forming pressure is 0.5±0.1MPa, and the high pressure forming time is 2min to 3min. The 3D modeling effect is achieved by high pressure and high temperature forming according to the modeling design drawings.

[0083] Furthermore, the composite plate is cut by using a computer numerical control (CNC) cutting method to obtain the housing 100 .

[0084] Specifically, the method for manufacturing a shell is used to manufacture a shell as described in any of the above embodiments.

[0085] According to some embodiments of the present application, optionally, Figure 1 and Fig. 9 As shown, transferring the second texture layer onto the acetate film comprises: laminating the second adhesive layer on the side of the acetate film away from the first texture layer; laminating the waterproof film on the second adhesive layer, and transferring the second texture layer onto the waterproof film.

[0086] In this embodiment, before the optical coating treatment is performed on the side of the first adhesive layer away from the acetate film, the second adhesive layer is also attached to the side of the acetate film away from the first texture layer, and the waterproof film is attached to the second adhesive layer. Because the surface of the acetate film is uneven, a thicker glue film is required to fill the gap between the acetate film and improve the bonding performance, and then the PC film or transfer waterproof glue is attached to achieve a sandwich structure to protect the acetate film.

[0087] Specifically, the surface of the PC film is covered with UV adhesive by using a transfer machine, and the UV glue is rolled by a roller to make the glue soak the surface of the PC film. The active groups such as ester groups / carboxyl groups in the adhesive can undergo ester exchange chemical reactions and ion interactions with the ester groups in the PC film to enhance their bonding strength, and then the LED is used for rapid curing to form a strong bond. The raw material thickness of the acetic acid film is 0.1mm, the viscosity of the UV adhesive is 3000cPs to 5000cPs, the film thickness is 20um to 30um, the roller pressure is 3kg to 5kg, the roller speed ratio (the ratio of the roller linear speed to the conveyor belt speed) is 13 to 15%, the roller hardness (Shore hardness) is 75A, and the LED curing energy is 600mJ / cm 2 Up to 800mJ / cm 2 , the curing energy of the two-solid mercury lamp is 1000mJ / cm 2 Up to 1500mJ / cm 2 The first adhesive layer is used as a laminating adhesive, which has excellent adhesion, weather resistance and yellowing resistance. It can achieve multi-to-multi large-scale lamination, ensure the adhesion of the acetate film, and ensure qualified performance; the laminating adhesive is UV curing type, which can be quickly cured to ensure production efficiency; because the surface of the acetate film is uneven, a thicker glue film thickness (20um to 30um) is required to fill the gap between the acetate film and improve the laminating performance, and then laminate the PC film or transfer waterproof glue to achieve a sandwich structure to protect the acetate film.

[0088] According to some embodiments of the present application, optionally, Figure 2 and Fig. 9 As shown, transferring the second texture layer onto the acetate film includes: transferring a waterproof adhesive layer onto the acetate film, wherein the waterproof adhesive layer has a texture.

[0089] In this embodiment, a waterproof adhesive layer is transferred onto the acetate film, and the transferred waterproof adhesive layer has a texture. The UV waterproof adhesive is transferred by rolling with a transfer machine roller, and quickly cured by LED to form a dense cross-linked network structure. While achieving the texture transfer, the acetate film is waterproofed, the acetate film is reduced, the acetate film absorbs less moisture in the air, and the probability of deformation and wrinkling of the acetate film is reduced.

[0090] The direction of waterproof adhesive layer is as follows Fig. 9 In the direction indicated by arrow B.

[0091] Specifically, the UV waterproof glue is transferred by rollers of the transfer machine, and quickly cured by LED to form a dense cross-linked network structure, which protects the acetate film. The viscosity of the UV waterproof glue is 1000cPs to 2000cPs, the film thickness is 20um to 30um, the roller pressure is 3kg to 5kg, and the LED curing energy is 1000mJ / cm 2 Up to 1500mJ / cm 2 , the curing energy of the two-solid mercury lamp is 1800mJ / cm 2 Up to 2500mJ / cm 2 The waterproof adhesive layer is a waterproof adhesive with the main functions of excellent weather resistance, chemical resistance and hydrophobicity, which can provide waterproof and moisture-resistant protection for the acetate membrane to ensure qualified performance; the waterproof adhesive is UV curable and can cure quickly to ensure production efficiency.

[0092] According to some embodiments of the present application, optionally, Fig.11 and Fig.12 As shown, before the composite board is formed, the method for manufacturing the shell further includes screen printing multiple layers of ink on the surface of the second coating layer to form a screen printing ink layer on the surface of the second coating layer.

[0093] In this embodiment, before the composite sheet is formed at the first temperature and the first pressure, the manufacturing method of the shell further includes screen printing multiple layers of ink on the surface of the second coating layer to form a screen printing ink layer on the surface of the second coating layer. The screen printing ink layer ensures that the performance of the shell is qualified, protects the upper process treatment layer, and plays a role in weather resistance and waterproofing. The screen printing ink layer is used for color matching, and different color effects are adjusted according to design requirements to meet the appearance effect requirements.

[0094] Specifically, five layers of ink are screen-printed on the inner surface, which mainly play the role of color effect, weather resistance and waterproofing, to ensure that the appearance effect and test performance are qualified; the ink thickness is 50um to 60um, the baking temperature of each layer is 80℃, and the baking time of each layer is 60min. According to some embodiments of the present application, optionally, such as Figure 1 and Figure 2 As shown, in order to achieve the appearance of a 3D modeling composite sheet with double texture and double plating and special texture effects of acetate film superimposed, the process scheme in the present application adopts a multi-to-multi large-sheet UV laminating adhesive transfer process, and the inner surface of the composite sheet is first subjected to UV transfer texture and optical coating treatment to achieve the first layer effect, and then the acetate film is bonded with UV laminating glue, and the inner layer is waterproofed to ensure the performance reliability of the acetate film. In order to further enhance the richness of the appearance effect, UV transfer texture and optical coating treatment are performed after the waterproof layer to achieve the second layer effect, and finally the appearance of a 3D modeling composite sheet with double texture and double plating and special texture effects of acetate film superimposed is achieved. The shell product has unique texture and rich gloss, which greatly enriches the appearance effect of the shell and enhances the product's appearance experience and the richness of the design.

[0095] Specifically, the electronic devices defined in the present application may be mobile phones, tablet computers, electronic notebooks, car-mounted tablets and other devices.

[0096] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0097] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A housing, characterized in that: include: substrate; a first texture layer, the first texture layer being disposed on the substrate; A first coating layer, the first coating layer is disposed on a side of the first texture layer away from the substrate; a first adhesive layer, the first adhesive layer being disposed on a side of the first coating layer away from the first texture layer; An acetate film, wherein the acetate film is arranged on a side of the first adhesive layer away from the first coating layer; a second texture layer, the second texture layer being disposed on a side of the acetate film away from the first adhesive layer; The second coating layer is arranged on a side of the second texture layer away from the acetate film.

2. The housing according to claim 1, characterized in that The second texture layer is a waterproof adhesive layer.

3. The housing according to claim 1, characterized in that Also includes: a second adhesive layer, the second adhesive layer being disposed on a side of the acetate film away from the first adhesive layer; A waterproof membrane, the waterproof membrane being attached to a side of the second adhesive layer away from the acetate membrane; The second texture layer is arranged on a side of the waterproof membrane away from the second adhesive layer.

4. The housing according to any one of claims 1 to 3, characterized in that Also includes: A silk-screen varnish layer, wherein the silk-screen varnish layer is disposed between the first coating layer and the first adhesive layer; A silk-screen ink layer is arranged on a side of the second coating layer away from the acetate film.

5. The housing according to any one of claims 1 to 3, characterized in that Also includes: The coating layer is disposed on a side of the substrate away from the first texture layer.

6. An electronic device, characterized in that: Comprising the housing according to any one of claims 1 to 5.

7. A method for manufacturing a housing, characterized in that: The method for manufacturing the housing comprises: Transferring a first texture layer on one side of a composite board, the composite board comprising a plurality of substrates arranged in parallel; Performing an optical coating process on the first texture layer to form a first coating layer on the surface of the first texture layer; Laminating a first adhesive layer on the first coating layer; Laminating the acetate film to the first adhesive layer; transferring a second texture layer onto the acetate film; Performing an optical coating process on the second texture layer to form a second coating layer; Performing a molding process on the composite sheet; Based on the arrangement of the substrate, the composite plate is cut and formed to obtain the shell.

8. The method for manufacturing a housing according to claim 7, characterized in that: The second texture layer is transferred onto the acetate film and includes: Laminating a second adhesive layer on a side of the acetate film away from the first texture layer; Laminating a waterproof membrane on the second adhesive layer; A second texture layer is transferred onto the waterproof membrane.

9. The method for manufacturing a housing according to claim 7, characterized in that: The second texture layer is transferred onto the acetate film and includes: A waterproof adhesive layer is transferred onto the acetate film, and the waterproof adhesive layer has a texture.

10. The method for manufacturing a housing according to any one of claims 7 to 9, characterized in that: Before the composite sheet is subjected to a forming process, the method for manufacturing the shell further comprises: Multiple layers of ink are screen-printed on the surface of the second coating layer to form a screen-printed ink layer on the surface of the second coating layer.

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