CN113950213A

CN113950213A - Shell, preparation method thereof and electronic equipment

Info

Publication number: CN113950213A
Application number: CN202111217348.2A
Authority: CN
Inventors: 成乐
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-10-19
Filing date: 2021-10-19
Publication date: 2022-01-18

Abstract

The application provides a shell, a preparation method thereof and electronic equipment. The casing of this application embodiment includes: a housing body; a hardened layer formed on a surface of the housing body; and the printing ink layer, form in the sclerosis layer deviates from the surface of casing body, the raw materials components on printing ink layer include polyurethane acrylate and epoxy acrylate, printing ink layer is kept away from the surface on sclerosis layer has texture structure, printing ink layer has at least one colour. The shell of the embodiment of the application has strong appearance expressive force and also has high hardness.

Description

Shell, preparation method thereof and electronic equipment

Technical Field

The application relates to the field of electronics, in particular to a shell, a preparation method of the shell and electronic equipment.

Background

With the development of the technology and the improvement of the living standard, people put forward higher requirements on the appearance visual effect of the electronic equipment, however, the appearance expressive force of the existing electronic equipment is not enough, and the requirements of consumers cannot be well met.

Disclosure of Invention

In view of the above problems, embodiments of the present application provide a housing having a strong appearance expression and a high hardness.

The embodiment of the application provides a casing, it includes:

a housing body;

a hardened layer formed on a surface of the housing body; and

the printing ink layer, form in the sclerosis layer deviates from the surface of casing body, the raw materials components on printing ink layer includes polyurethane acrylate and epoxy acrylate, printing ink layer is kept away from the surface on sclerosis layer has texture structure, printing ink layer has an at least colour.

In addition, the present application also provides a method for preparing a housing, comprising:

providing a shell body;

forming a hardened layer on the surface of the shell body;

printing an ink adhesive layer on the surface of the hardened layer, which is far away from the shell body, wherein the ink adhesive layer comprises polyurethane acrylate and epoxy acrylate, and the ink adhesive layer is provided with at least one color of ink; and

impressing texture on the ink glue layer, and curing to form an ink layer on the ink glue layer to obtain the shell, wherein the surface of the ink layer far away from the hardened layer is provided with the texture structure.

In addition, the present application also provides an electronic device, which includes:

a display component;

the shell is used for bearing the display assembly; and

and the circuit board assembly is arranged between the shell and the display assembly, is electrically connected with the display assembly and is used for controlling the display assembly to display.

The casing of this application includes the printing ink layer, and printing ink layer 50 has an at least colour, and from this, the printing ink layer can form through the mode that ink jet printer printed to can design through colour, the mode of arranging, pattern etc. to an at least colour, make the designability on printing ink layer stronger, have better outward appearance expressive force, the demand that satisfies the consumer that can be better, and need not additionally to set up the colour layer, also can realize the colour effect. In addition, the ink layer comprises polyurethane acrylate and epoxy acrylate, and the epoxy acrylate can improve the hardness of the ink layer, so that the shell has high hardness while having changeable patterns and colors.

Drawings

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

Fig. 1 is a schematic perspective view of a housing according to an embodiment of the present application.

Fig. 2 is a partial sectional structural view of the housing of an embodiment of the present application along a-a in fig. 1.

Fig. 3 is a schematic sectional view of a housing according to another embodiment of the present application, taken along the direction a-a in fig. 1.

FIG. 4 is a schematic view of a partial cross-section taken along the line A-A in FIG. 1 according to yet another embodiment of the present application.

Fig. 5 is a schematic flow chart of a method for manufacturing a housing according to an embodiment of the present application.

FIG. 6 is a schematic flow chart of texture imprinting according to an embodiment of the present application.

Fig. 7 is a schematic flow chart of a method for manufacturing a housing according to an embodiment of the present application.

Fig. 8 is a schematic flow chart of a method of manufacturing a housing according to an embodiment of the present application.

Fig. 9 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Fig. 10 is a schematic diagram of a partially exploded structure of an electronic device according to an embodiment of the present application.

Fig. 11 is a circuit block diagram of an electronic device according to an embodiment of the present application.

Description of reference numerals:

100-shell 101-containing space

10-case body 60-coating layer

10' -texture mold 70-logo

11-bottom 80-lid bottom layer

13-side 500-electronic device

20-color layer 510-display component

30-hardened layer 530-circuit board assembly

40-texture layer 531-processor

50-ink layer 533-memory

51-texture structure

Detailed Description

In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "first," "second," and the like in the description and claims of the present application and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

It should be noted that, for convenience of description, like reference numerals denote like parts in the embodiments of the present application, and a detailed description of the like parts is omitted in different embodiments for the sake of brevity.

In order to make the surface of the shell have a texture effect, a layer of light-cured glue layer can be coated on the surface of the shell substrate by using light-cured glue (such as UV glue), and after texture transfer printing, light-cured formation is carried out. However, the photo-curing glue layer thus formed is colorless, cannot form a gradient texture layer or a texture layer having a color pattern, and is poor in appearance. In addition, the surface of the shell is transferred with textures by using UV glue, and a 3D shell is manufactured by generally transferring a UV texture layer on the surface of a plane shell substrate and then performing hot bending forming, so that the manufactured shell is difficult to have both high hardness and good toughness. If the UV texture layer is too soft, the UV texture layer is not easy to crack in the hot bending forming process, but the wear resistance of the prepared UV texture layer is poor; if the UV texture layer is too hard, the UV texture layer is easily cracked during the hot roll forming process.

In addition, the texture may be prepared by a printing process, specifically, a liquid is sprayed onto the housing substrate to form droplets dispersed one by one on the surface of the housing substrate, and the droplets are solidified to form the texture structure 51. The texture structure 51 prepared in this way is a three-dimensional texture formed by continuously accumulating and solidifying liquid drops, and since the liquid drops are spherical, the accumulated texture is also a large texture formed by accumulating rough liquid drop arc surfaces after being enlarged, the minimum precision can only be about 15um, and the texture manufacturing of fine ridge lines and pyramids cannot be realized (for example, the texture with the size of 0.1 μm cannot be realized).

Referring to fig. 1 and 2, an embodiment of the present application provides a housing 100, which includes: a housing body 10; a hardened layer 30 formed on the surface of the housing body 10; and an ink layer 50 formed on the surface of the case body 10 away from the hardened layer 30, wherein the raw material components of the ink layer 50 include urethane acrylate and epoxy acrylate, and the ink layer 50 is far away from the surface of the hardened layer 30 and has a texture structure 51. The ink layer 50 has at least one color.

The term "at least one" in the present application means more than one, and specifically, may be, but not limited to, 1, 2, 3, 4, 5, 6, 7, 8, etc.

The utility model provides a casing 100 includes printing ink layer 50, and printing ink layer 50 has an at least colour, and from this, printing ink layer 50 can form through the mode that ink jet printer printed to can be through the colour to an at least colour, the mode of arranging, pattern etc. design, make printing ink layer 50 designability stronger, have better outward appearance expressive force, the demand that satisfies the consumer that can be better, and need not additionally to set up the colour layer, also can realize the colour effect. In addition, the ink layer 50 includes urethane acrylate and epoxy acrylate, and the epoxy acrylate may increase the hardness of the ink layer 50, so that the case 100 has higher hardness while having stronger designability.

The housing 100 of the present application may be applied to portable electronic devices such as a mobile phone, a tablet computer, a notebook computer, a desktop computer, an intelligent bracelet, an intelligent watch, an electronic reader, and a game machine. Alternatively, the case 100 of the present application may be a rear cover (battery cover) of an electronic device, a middle frame, a decoration, and the like. The housing 100 of the embodiment of the present application may have a 2D structure, a 2.5D structure, a 3D structure, or the like. As shown in fig. 3, optionally, the housing body 10 includes a bottom portion 11 and a side portion 13, and the bottom portion 11 and the side portion 13 are connected by bending and are of an integral structure.

In some embodiments, the housing body 10 comprises at least one of inorganic glass or resin. Alternatively, the resin may include at least one of polymethyl methacrylate, polycarbonate, polyethylene terephthalate, and the like. Optionally, the housing body 10 is light-transmitting, and the light transmittance of the housing body 10 may be greater than or equal to 85%, and further, the light transmittance of the housing body 10 may be greater than or equal to 90%; specifically, the light transmittance of the case body 10 may be, but is not limited to, 85%, 88%, 90%, 93%, 95%, 97%, 98%, 99%, etc.

Optionally, the thickness of the housing body 10 is 0.25mm to 1 mm; specifically, the thickness of the case body 10 may be, but is not limited to, 0.25mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, and the like. When the housing body 10 is too thin, the supporting and protecting functions cannot be well performed, the mechanical strength cannot well meet the requirements of the electronic device housing 100, and when the housing body 10 is too thick, the weight of the electronic device is increased, the hand feeling of the electronic device is affected, and the user experience is not good.

In the examples of this application, when referring to the numerical ranges "a to b", the end point value a is included and the end point value b is included, if not specifically indicated. For example, the thickness of the housing body 10 is 0.25mm to 1mm, which means that the thickness of the housing body 10 can be any value between 0.25mm to 1mm, including the end point 0.25mm and the end point 1 mm.

In some embodiments, the raw material components (i.e., the hardening liquid) of the hardened layer 30 include urethane acrylate, a first photoinitiator, a solvent, and an auxiliary agent.

Optionally, the urethane acrylate comprises at least one of 3-functional urethane acrylate, 4-functional urethane acrylate, 5-functional urethane acrylate, 6-functional urethane acrylate, 7-functional urethane acrylate, 8-functional urethane acrylate, 9-functional urethane acrylate, 10-functional urethane acrylate, 11-functional urethane acrylate, 12-functional urethane acrylate, 13-functional urethane acrylate, 14-functional urethane acrylate, 15-functional urethane acrylate. In the raw material components of the hardened layer 30, the weight fraction of the urethane acrylate is 30 to 40 percent; specifically, it may be, but is not limited to, 30%, 32%, 35%, 38%, 40%, etc.

Alternatively, the first photoinitiator may be, but is not limited to, 1-hydroxycyclohexyl phenyl ketone (photoinitiator 184), Diphenyl- (2,4,6-Trimethylbenzoyl) oxyphosphate (Diphenyl (2,4,6-Trimethylbenzoyl) phenophine Oxide, TPO), 2-Hydroxy-4- (2-hydroxyethoxy) -2-methylpropiophenone (2-Hydroxy-4' - (2-hydroxyethoxy) -2-methylpropiophenone, photoinitiator 2959), propylthioxanthone (ITX), 2-phenylbenzyl-2-dimethylamine-1- (4-morpholinobenzylphenyl) butanone (photoinitiator), 2, 4-Diethylthioxanthone (DETX), 2-Hydroxy-2-methyl-1-phenyl-1-propanone (photoinitiator 1173), At least one of Benzophenone (BP). Alternatively, the weight of the first photoinitiator is 0.5% to 3% of the weight of the urethane acrylate; specifically, it may be, but not limited to, 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, etc.

Alternatively, the solvent may be, but is not limited to, at least one of ethyl acetate, propyl acetate, butyl acetate, cyclohexanone, propylene glycol methyl ether acetate, ethylene glycol monobutyl ether, ethylene glycol monomethyl ether, isopropanol, methyl ethyl ketone, and methyl butyl ketone. The auxiliary agent comprises a defoaming agent, a leveling agent and the like; the defoaming agent may be at least one of a silicone defoaming agent and a polyether defoaming agent, and the leveling agent may be, but not limited to, a silicone leveling agent, a surfactant (e.g., an anionic surfactant, a cationic surfactant, an amphoteric surfactant), and the like.

In other embodiments, the raw material components (i.e., the hardening liquid) of the hardened layer 30 further include epoxy acrylate and an alkenyl-containing monomer; in other words, the raw material components of the hardened layer 30 include urethane acrylate, epoxy acrylate, an alkenyl-containing monomer, a first photoinitiator, a solvent, and an auxiliary agent.

Optionally, the weight of the epoxy acrylate is 0% to 30% of the weight of the urethane acrylate; specifically, it may be, but not limited to, 0%, 5%, 10%, 15%, 20%, 25%, 30%, etc. When epoxy acrylate is included in the raw material components of the hardened layer 30, the hardness of the hardened layer 30 is made higher, but when epoxy acrylate is more than 30% by weight of urethane acrylate in the raw material components of the hardened layer 30, the hardened layer 30 is made brittle and the impact resistance is reduced.

Alternatively, the alkenyl-containing monomer may be, but is not limited to, at least one of 1, 6-hexanediol diacrylate (HDDA), isobornyl acrylate (IBOA), dipentaerythritol hexaacrylate (DPHA), tetrahydrofurfuryl acrylate (THFA), N-vinyl pyrrolidone (NVP), trimethylol cyclohexyl acrylate (TMCHA), neopentyl glycol diacrylate (NPGDA), pentaerythritol triacrylate (PETA), trimethylolpropane triacrylate (TMPTA). In the raw material composition of the hardened layer 30, the weight of the alkenyl-containing monomer is 0% to 5% of the weight of the urethane acrylate; specifically, it may be, but not limited to, 0%, 1%, 2%, 3%, 4%, 5%, etc. When the raw material components of the hardened layer 30 include the alkenyl-containing monomer, the viscosity of the hardening liquid can be reduced, and the leveling property of the hardening liquid can be improved, thereby facilitating the uniformity of the thickness of the hardened layer 30.

Alternatively, the hardened layer 30 may be formed by: 1) the raw material components of the hardening layer 30 are mixed to obtain hardening liquid, the hardening liquid is sprayed or drenched on the shell body 10, and the shell body is baked for 3min to 8min at the temperature of 55 ℃ to 80 ℃ so as to basically volatilize the solvent in the hardening liquid. 2) At a curing energy of 200mj/cm²To 1000mj/cm²The first photoinitiator is decomposed under the mercury lamp of (1) to generate radicals, which initiate polymerization of urethane acrylate, epoxy acrylate, an alkenyl group-containing monomer, and the like, thereby forming the cured layer 30.

In some embodiments, the dyne value of the surface of the hardened layer 30 is greater than 36dyn, for example, may be greater than 40dyn, 50dyn, or 60dyn, etc.; specifically, but not limited to, 36.1dyn, 38dyn, 40dyn, 45dyn, 50dyn, 55yn, 60dyn, 70yn, 80dyn, and the like. The dyne value of the surface of the hardened layer 30 is too low, so that when ink printing is performed before the ink layer 50 is formed, the adhesive force of the ink on the surface of the hardened layer 30 is reduced, and the prepared shell 100 is easier to layer (for example, a hundred lattices is easy to fall off when being boiled in water at 100 ℃ for 30 min); the higher the dyne value of the hardened layer 30 is, the better the ink is wetted on the surface of the hardened layer 30 when the ink is printed, and the firmer the adhesive force on the surface of the hardened layer 30 after the ink is solidified to form the ink layer 50 is. Alternatively, the dyne value of the surface of the hardened layer 30 may be controlled by controlling the ratio or the amount of hydrophilic groups such as hydroxyl groups and carboxyl groups on the resin formed by the final curing of urethane acrylate and epoxy acrylate.

Alternatively, the hardness of the hardened layer 30 is 2H to 4H, and specifically, may be, but is not limited to, 2H, 3H, 4H, or the like.

Alternatively, the thickness of the hardened layer 30 is 3 μm to 10 μm, and specifically, the thickness of the hardened layer 30 may be, but is not limited to, 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, and the like. When the thickness of the hardened layer 30 is too thin (less than 3 μm), it cannot play a good supporting role, and the contribution to the hardness of the ink layer 50 side of the case 100 is small, which affects the hardness of the surface of the ink layer 50 of the manufactured case 100, and when the thickness of the hardened layer 30 is too large (greater than 10 μm), the case 100 has a risk of cracking during an aging test (such as ultraviolet irradiation, high-temperature high-humidity aging, and the like).

Optionally, the ink layer 50 is an ink layer 50 formed by printing, and the ink layer 50 has at least two colors. Specifically, inks of different colors are used, an ink jet printer is used for printing to form an ink glue layer, and then the texture structure 51 is impressed on the ink glue layer, so that the surface of the ink layer 50 has the texture structure 51 and has a color pattern formed by at least two colors. By printing a layer of ink glue layer, the texture structure 51 with the size or line width as low as 0.1 μm can be prepared by impressing the texture structure 51 with a texture mold, and in addition, the ink layer 50 can have a color pattern, so that a color layer does not need to be arranged in the shell 100, the function of the color layer can be realized, and the thickness of the shell 100 is reduced. Optionally, the ink layer 50 may have a color in the whole layer, or only the surface of the ink layer 50 away from the hardened layer 30 may have a color, and the ink layer 50 may have at least two colors locally, or may have at least two colors in the whole layer. The term "at least one" in the present application means more than one, and specifically, may be, but not limited to, 1, 2, 3, 4, 5, 6, 7, 8, etc.

In one embodiment, the ink layer 50 is a gradient color, which allows the casing 100 to have a gradient color, thereby providing the casing 100 with a better visual effect.

In one embodiment, the ink layer is printed by using transparent ink and color ink, such that the ink layer is mainly a transparent ink layer, the transparent ink layer is embedded with a pattern formed by the color ink, and then the texture structure 51 is transferred on the ink layer and cured to form the ink layer 50. The ink layer 50 thus formed has not only a color pattern having at least one color, but also a color pattern embedded in the transparent ink layer, so that the color pattern has a three-dimensional transparent visual effect, thereby enabling the housing 100 to have a better visual effect.

In some embodiments, the raw material components (i.e., the ink) of the ink layer 50 further include an alkenyl-containing monomer, a colorant, a second photoinitiator, and an auxiliary agent. In other words, the raw material components (i.e., the ink) of the ink layer 50 include urethane acrylate, epoxy acrylate, an alkenyl group-containing monomer, a colorant, a second photoinitiator, and an auxiliary agent. In one embodiment, the raw material components (i.e., the ink) of the ink layer 50 are composed of urethane acrylate, epoxy acrylate, an alkenyl-containing monomer, a colorant, a second photoinitiator, and an auxiliary agent. The ink layer 50 is formed from a material composition that does not include a solvent.

Optionally, the total weight fraction of the urethane acrylate and the epoxy acrylate in the raw material components of the ink layer 50 is 10% to 40%, and specifically, may be, but is not limited to, 10%, 15%, 20%, 25%, 30%, 35%, 40%, and the like. Optionally, the weight fraction of the alkenyl-containing monomer in the raw material components of the ink layer 50 is 40% to 75%; specifically, it may be, but not limited to, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, etc. When the total weight of the urethane acrylate and the epoxy acrylate in the ink is too low and the content of the alkenyl-containing monomer is too high, the viscosity of the ink is too low, the continuity of the ink during printing is not good, the performance of the prepared ink layer 50 is affected, and in addition, the wear resistance and the toughness of the prepared ink layer 50 are poor; when the total weight of the urethane acrylate and the epoxy acrylate in the ink is too high and the content of the alkenyl monomer is too low, the viscosity of the ink is too high, ink jetting is difficult, the printing effect is poor, the adhesion of the ink layer 50 on the hardened layer 30 is reduced, and the service life of the manufactured shell 100 is affected.

In some embodiments, the weight ratio of the urethane acrylate to the epoxy acrylate in the raw material components (i.e., ink) of the ink layer is from 1:1 to 2: 1; specifically, it may be, but not limited to, 1:1, 1.2:1, 1.5:1, 1.8:1, 2:1, etc. When the weight ratio of the urethane acrylate to the epoxy acrylate is less than 1:1, the formed ink layer 50 has good pencil hardness and wear resistance, but poor bending performance and aging resistance, and when the weight ratio of the urethane acrylate to the epoxy acrylate is greater than 2:1, the formed ink layer 50 has good bending performance, but poor pencil hardness and wear resistance. When the weight ratio of the urethane acrylate to the epoxy acrylate is 1:1 to 2:1, the abrasion resistance, bending property and aging resistance of the formed ink layer 50 can be better balanced.

Optionally, the urethane acrylate comprises at least one of 3-functional urethane acrylate, 4-functional urethane acrylate, 5-functional urethane acrylate, 6-functional urethane acrylate, 7-functional urethane acrylate, 8-functional urethane acrylate, 9-functional urethane acrylate, 10-functional urethane acrylate, 11-functional urethane acrylate, 12-functional urethane acrylate, 13-functional urethane acrylate, 14-functional urethane acrylate, 15-functional urethane acrylate. Alternatively, the alkenyl-containing monomer may be, but is not limited to, at least one of 1, 6-hexanediol diacrylate (HDDA), isobornyl acrylate (IBOA), dipentaerythritol hexaacrylate (DPHA), tetrahydrofurfuryl acrylate (THFA), N-vinyl pyrrolidone (NVP), trimethylol cyclohexyl acrylate (TMCHA), neopentyl glycol diacrylate (NPGDA), pentaerythritol triacrylate (PETA), trimethylolpropane triacrylate (TMPTA). When the content of the alkenyl monomer in the ink is constant, the higher the content of the high-functional monomer (e.g., dipentaerythritol hexaacrylate) in the ink is, the better the abrasion resistance of the ink layer 50 is.

Alternatively, the second photoinitiator may include, but is not limited to, 1-hydroxycyclohexyl phenyl ketone (photoinitiator 184), Diphenyl- (2,4,6-Trimethylbenzoyl) oxyphosphorus (Diphenyl (2,4,6-Trimethylbenzoyl) phenoline Oxide, TPO), Benzophenone (Benzophenone, BP), propylthioxanthone (ITX), 2, 4-Diethylthioxanthone (DETX), 2-hydroxy-2-methyl-1-phenyl acetone (photoinitiator 1173), photoinitiator 1000(20 wt% 1-hydroxycyclohexyl phenyl ketone and 80 wt% 2-methyl-2-hydroxy-1-phenyl-1-propanone), photoinitiator 1300(30 wt% photoinitiator 369 and 70 wt% photoinitiator 651 (dimethylbenzylketal, DMPA)), phenylbis (2,4,6-trimethylbenzoyl) phosphine oxide (photoinitiator 819), photoinitiator 1700(25 wt% of photoinitiator 819 and 75 wt% of photoinitiator 1173), photoinitiator 500(50 wt% of photoinitiator 1173 and 50 wt% of BP), active amine, 2-phenylbenzyl-2-dimethylamine-1- (4-morpholinylbenzyl) butanone (photoinitiator 369), 2-Hydroxy-4- (2-hydroxyethoxy) -2-methylpropiophenone (2-Hydroxy-4' - (2-hydroxyethoxy) -2-methylpropiophenone, photoinitiator 2959), bis [2, 6-difluoro-3- (1H-pyrrolyl-1) phenyl ] titanocene (photoinitiator 784), 2-methyl-1- (4-methylthiophenyl) -2-morpholinyl- 1-propanone (photoinitiator 907). In the ink, the weight fraction of the second photoinitiator is 6% to 12%; specifically, it may be, but not limited to, 6%, 8%, 10%, 12%, etc.

Optionally, the colorant comprises at least one of an organic colorant and an inorganic colorant. The organic colorant includes, but is not limited to, at least one of azo pigments, phthalocyanines, methyleneamine pigment yellow pigments, and the like. The weight fraction of the organic coloring material is 1% to 5%, and specifically, may be, but not limited to, 1%, 2%, 3%, 4%, 5%, and the like. The inorganic colorant includes, but is not limited to, at least one of titanium oxide, carbon black, red iron oxide, blue iron oxide, chromium oxide, copper oxide, and the like. The inorganic coloring material is 1 to 10% by weight, and specifically, may be, but not limited to, 1%, 2%, 3%, 4%, 5%, 6%, 8%, 10%, etc.

Optionally, the auxiliary agent comprises a defoaming agent, a leveling agent, a polymerization inhibitor and the like; the weight content of the auxiliary agent is 0.5-2%; specifically, it may be, but not limited to, 0.5%, 1%, 1.5%, 2%. The defoaming agent may be at least one of a silicone defoaming agent and a polyether defoaming agent, and the leveling agent may be, but not limited to, a silicone leveling agent, a surfactant (e.g., an anionic surfactant, a cationic surfactant, an amphoteric surfactant), and the like. The polymerization inhibitor may be at least one of p-hydroxyanisole, hydroquinone, 2, 6-di-tert-butyl-p-cresol, and tris (N-nitroso-N-phenylhydroxylamine) aluminum salt (NPAL).

Optionally, the ink has a viscosity of 7 to 30 mps; specifically, it may be, but is not limited to, 7mps, 10mps, 15mps, 20mps, 25mps, 30mps, etc. When the viscosity of the ink is too low, the continuity of the ink is poor, and the abrasion resistance, adhesion and toughness of the ink layer 50 prepared from poor ink performance are poor. When the viscosity of the ink is too high, ink is difficult to jet and the printing effect is not good, which reduces the adhesion of the ink layer 50 on the hardened layer 30 and affects the service life of the manufactured shell 100.

Alternatively, the ink layer 50 may be formed by: 1) firstly, mixing the raw material components of the ink layer 50 to prepare the ink, adopting the ink, utilizing a printer to coat an ink adhesive layer on the hardened layer 30, and setting the curing energy to be 300mj/cm²To 1500mj/cm²The first stage of light curing is performed under the LED lamp. 2) At a curing energy of 800mj/cm²To 2000mj/cm²Under a mercury lamp, the ink layer 50 was formed.

Optionally, the thickness of the ink layer 50 is 5 μm to 25 μm; specifically, the thickness of the ink layer 50 may be, but is not limited to, 5 μm, 6 μm, 8 μm, 10 μm, 12 μm, 15 μm, 16 μm, 17 μm, 18 μm, 20 μm, 23 μm, 25 μm, and the like. The thickness of the ink layer 50 is too thin, the filling surface of the printing ink is not complete enough, the wear resistance is poor, and steel wool is easy to rub off due to friction; the thickness of the ink layer 50 is too thick, and after the ink is cured, the shrinkage stress generated by the ink layer 50 is too large, so that the ink is easy to crack in the using process.

The pencil hardness (1Kg pencil hardness) of the surface of the ink layer 50 of the case 100 prepared in the present application may be 3H to 5H, and specifically, may be, but is not limited to, 3H, 4H, 5H, and the like. Pencil Hardness (Pensil Hardness), also known as film Hardness Pencil test. The hardness of the pencil lead is divided into 13 grades, and gradually decreases from the hardest 6H to 5H, 4H, 3H and 2H, H, then passes through HB with moderate hardness, and then goes from B and 2B to the softest 6B. Wherein H represents hardness (hardness) and B represents blackness (black). The hardness is reduced from 6H to 6B, and the color of the pencil is darker. The shade of the color is related to the graphite content, and the darker the color, the higher the graphite content, and the softer the pencil.

After the shell 100 prepared by the method is boiled in water at 100 ℃ for 1 hour, the hundred-grid test result can reach 5B. After the leather is rubbed back and forth by 0000# steel wool and a load of 1Kg, no scratch is caused for more than 400 times.

Referring to fig. 4, in some embodiments, the housing body 10 is transparent, the housing 100 further includes a color layer 20, a texture layer 40, a film coating layer 60 and a cover bottom layer 80 sequentially stacked on a side of the housing body 10 away from the ink layer 50, and the color layer 20 is disposed closer to the housing body 10 than the cover bottom layer 80. The color layer 20 is used to make the housing 100 have different colors, and in addition, the adhesion of the texture layer 40 on the housing body 10 can be increased. The texture layer 40 is used to provide the shell 100 with more layers of texture, and better avoid homogenization of the texture of the shell 100. The coating layer 60 serves to provide the case 100 with a better texture or appearance. The cover bottom layer 80 serves to prevent light leakage from the cover bottom.

Optionally, the raw material components of the color layer 20 include modified acrylate polyurethane resin, nano color paste, photoinitiator, and the like. Alternatively, the photoinitiator may be, but is not limited to, cyclohexanone (HCPK), Diphenyl- (2,4,6-Trimethylbenzoyl) oxyphosphate (Diphenyl (2,4,6-Trimethylbenzoyl) phenyl Oxide, TPO), 1-hydroxycyclohexylphenylketone (photoinitiator 184, 1-hydroxycyclohexylphenylketone), Benzophenone (Benzophenone, BP), propylthioxanthone (ITX), 2, 4-Diethylthioxanthone (DETX), 2-hydroxy-2-methyl-1-phenyl-1-propanone (photoinitiator 1173), 2-phenylbenzyl-2-dimethylamine-1- (4-morpholinebenzyl) butanone (photoinitiator 369), phenylbis (2,4,6-trimethylbenzoyl) phosphine oxide (photoinitiator 819), and the like. The thickness of the color layer 20 is 2 μm to 30 μm, and specifically, may be, but is not limited to, 2 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, 12 μm, 15 μm, 18 μm, 20 μm, 23 μm, 25 μm, 30 μm, and the like. Alternatively, the color layer 20 is formed by spraying, offset printing or printing the raw material components of the color layer 20, and then exposing the raw material components to a curing energy of 600mj/cm²To 800mj/cm²And carrying out light curing under the LED lamp. When the color layer 20 is cured, the curing energy of the LED lamp is not too high, and if the curing energy of the LED lamp is too high, the cross-linking degree of the prepared color layer 20 is too high, and the hardness is too high, thereby affecting the adhesion between the texture layer 40 and the color layer 20.

Alternatively, the texture layer 40 is formed by transferring light-curing glue and then performing light-curing. Optionally, photocuringThe glue comprises urethane acrylate, a photoinitiator, a solvent and an auxiliary agent. Alternatively, the photoinitiator may be, but is not limited to, 1-hydroxycyclohexyl phenyl ketone (photoinitiator 184), Diphenyl- (2,4,6-Trimethylbenzoyl) oxyphosphorus (Diphenyl (2,4,6-Trimethylbenzoyl) Phosphine Oxide (TPO), Benzophenone (Benzophenone, BP), propylthioxanthone (ITX), 2, 4-Diethylthioxanthone (DETX), 2-hydroxy-2-methyl-1-phenyl acetone (photoinitiator 1173), photoinitiator 1000(20 wt% 1-hydroxycyclohexyl phenyl ketone and 80 wt% 2-methyl-2-hydroxy-1-phenyl-1-acetone), photoinitiator 1300(30 wt% photoinitiator 369 and 70 wt% photoinitiator 651 (dimethylbenzylketal, DMPA)), photoinitiator 1700(25 wt% of photoinitiator BAPO (also called photoinitiator 819) and 75 wt% of photoinitiator 1173), photoinitiator 500(50 wt% of photoinitiator 1173 and 50 wt% of BP). Specifically, the texture layer 40 is formed by photocuring glue with the wavelength of 365nm to 395nm and the curing energy of 800mj/cm²To 2500mj/cm²Optionally, the texture layer 40 may be further cured at a curing energy of 550mj/cm²To 1500mj/cm²Mercury lamp curing (more complete curing of the light-curable glue) to improve the adhesion of the texture layer 40 on the color layer 20. The thickness of the texture layer 40 is 5 μm to 20 μm, and specifically, may be, but is not limited to, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, 12 μm, 15 μm, 18 μm, 20 μm, and the like.

Optionally, the plating layer 60 comprises In, Sn, TiO₂、Ti₃O₅、NbO₂、Nb₂O₃、Nb₂O₂、Nb₂O₅、SiO₂、ZrO₂Or other non-conductive oxide, and the like. Alternatively, the total thickness of the plating layer 60 may be, but is not limited to, 5nm to 500 nm; specifically, it may be, but not limited to, 5nm, 10nm, 50nm, 100nm, 200nm, 300nm, 400nm, 500nm, etc. Alternatively, the number of the plating layers 60 may be one or more, and when the number of the plating layers 60 is plural, plural optical coatings are sequentially stacked. In one embodiment, the number of coating layers 60 may be 3 to 15, specificallyBut may be, but not limited to, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, etc. Alternatively, each of the plating layers 60 may have a thickness of 3nm to 140nm, and specifically, may be, but not limited to, 3nm, 5nm, 8nm, 10nm, 15nm, 20nm, 25nm, 30nm, 35nm, 40nm, 50nm, 60nm, 70nm, 80nm, 90nm, 100nm, 110nm, 120nm, 130nm, 140nm, and the like. Alternatively, the plating layer 60 may be formed using at least one of an evaporation plating process, a sputtering plating process, an Atomic Layer Deposition (ALD) technique, and the like.

Alternatively, the cover bottom layer 80 may be, but is not limited to, a light-blocking ink that has an absorbing or reflecting effect on light. Alternatively, the cover bottom layer 80 may be black, white, or gray. The cover bottom layer 80 is used for preventing parts inside the electronic device from being exposed from the hardened layer side of the housing when the housing is applied to the electronic device. Alternatively, the thickness of the cover bottom layer 80 is 5 μm to 50 μm, and specifically, the thickness of the cover bottom layer 80 may be, but not limited to, 5 μm, 8 μm, 10 μm, 12 μm, 15 μm, 18 μm, 20 μm, 22 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, and the like. Alternatively, the lid bottom layer 80 may be one layer or may be multiple layers, such as a 2-layer, 3-layer, 4-layer, or 5-layer laminate arrangement. When the cover bottom layer 80 is a plurality of layers, it has a better shielding effect than one layer. Alternatively, each of the cap and base layers 80 has a thickness of 8 μm to 12 μm, and specifically, may be, but not limited to, 8 μm, 9 μm, 10 μm, 11 μm, 12 μm, or the like. Each of the cap and base layers 80 may be formed by: and coating the shading ink on the surface of the optical coating layer far away from the hardened layer, and baking at 70-80 ℃ for 30-60 min to form the cover bottom layer 80.

Optionally, referring to fig. 4 again, the housing 100 may further include an identification portion 70(LOGO), the identification portion 70 may be disposed between the housing body 10 and the color layer 20, the identification portion 70 may be printed on the surface of the housing body 10 away from the ink layer 50 by screen printing using high-reflectivity ink such as mirror silver/mirror gold, and then baked at a temperature of 60 ℃ to 80 ℃ for 45min to 80 min; the thickness of the marker 70 may be 1 μm to 4 μm, and specifically, may be, but is not limited to, 1 μm, 2 μm, 3 μm, 4 μm, and the like.

The method for manufacturing the housing 100 according to the embodiment of the present application will be described in detail below.

Referring to fig. 5, an embodiment of the present application further provides a method for manufacturing a housing 100, which includes:

s201, providing a shell body 10;

alternatively, the housing body 10 may be a transparent substrate or an opaque substrate. Alternatively, the housing body 10 may be a transparent substrate 10, or may be an opaque substrate 10. The transparent substrate may be, but is not limited to, a Polycarbonate (PC) substrate, a Polyethylene terephthalate (PET) substrate, a PC/PMMA composite board, a PET/PMMA composite board, a PC/PET/PMMA composite board, and the like. For the same parts as those in the above embodiments, please refer to the description of the corresponding parts in the above embodiments, which is not repeated herein.

S202, forming a hardened layer 30 on the surface of the housing body 10;

optionally, mixing the raw material components of the hardened layer 30 to obtain a hardened liquid, spraying or curtain-coating the hardened liquid on the shell body 10, and drying at 55 to 80 ℃ for 3 to 8min to basically volatilize the solvent in the hardened liquid to form a hardened glue layer; at a curing energy of 200mj/cm²To 1000mj/cm²The first photoinitiator is decomposed to generate radicals, and polymerization of urethane acrylate, epoxy acrylate, an alkenyl group-containing monomer, and the like is initiated to form the hardened layer 30. In other embodiments, the hardened layer 30 may also be formed by thermal curing using a hardened glue layer.

For a detailed description of the hardened layer 30, reference is made to the description of the corresponding portions of the above embodiments, which are not repeated herein.

S203, printing an ink adhesive layer on the surface of the hardened layer 30, which is far away from the shell body 10, wherein the ink adhesive layer comprises polyurethane acrylate and epoxy acrylate, and the ink adhesive layer has at least one color of ink; and

optionally, an ink glue layer is printed on the surface of the hardened layer 30 facing away from the housing body 10 by using at least one color ink, in other words, using inks of different colors, using an inkjet printer (not shown). Wherein the ink comprises urethane acrylate and epoxy acrylate. For detailed description of the ink, reference is made to the detailed description of the above embodiments, which are not repeated herein.

Optionally, the inkjet printer comprises a nozzle (not shown) having an aperture in the range of 5pl to 45 pl; specifically, it may be, but not limited to, 5pl, 10pl, 15pl, 20pl, 25pl, 30pl, 35pl, 40pl, 45pl, etc. The larger the aperture of the nozzle is, the higher the printing efficiency of the ink glue layer is; the smaller the pore size of the head, the less efficient the printing of the ink paste layer, and when the viscosity of the ink is high, clogging is easily caused or ink ejection is difficult.

Optionally, the distance between the nozzle and the surface of the hardened layer 30 is 2mm to 30mm during printing; specifically, it may be, but is not limited to, 2mm, 5mm, 8mm, 10mm, 15mm, 20mm, 25mm, 30mm, and the like. The distance between the spray head and the surface of the hardened layer 30 is too short, so that the spray head is easy to collide with the surface of the hardened layer 30, and construction is difficult; the spray head is too far from the surface of the hardened layer 30, and the sprayed liquid droplets are susceptible to movement and wind resulting in misalignment.

And S204, stamping textures on the ink adhesive layer, and curing to form an ink layer 50 on the ink adhesive layer, so as to obtain the shell 100, wherein the surface, away from the hardened layer 30, of the ink layer 50 has a texture structure 51.

Optionally, a texture mold 10' (e.g., PET with texture) is used to imprint the texture on the surface of the ink glue layer away from the hardened layer 30 under vacuum (e.g., vacuum pumping in a vacuum chamber) to form a texture structure 51 on the surface of the ink glue layer away from the hardened layer 30. Specifically, as shown in fig. 6, the textured surface of the texture mold 10 'is pressed against the ink glue layer, and vacuum is applied to make the texture mold 10' better adhere to the ink glue layer, thereby preventing bubbles from occurring in the ink glue layer. In addition, texture features 51 may also be formed by rolling with textured rollers. In this way, the texture features of the texture mold 10' can be replicated 1:1 on the ink glue layer, thereby allowing the resulting texture 51 to have finer textures, such as texture 51 with dimensions or line widths of 0.1 μm to 10 μm.

Alternatively, the air pressure in a vacuum state (in other words, the air pressure within the vacuum chamber) is 100Pa to 3000 Pa; specifically, it may be, but is not limited to, 100Pa, 300Pa, 500Pa, 1000Pa, 1500Pa, 2000Pa, 2500Pa, 3000Pa, or the like. When the air pressure in the vacuum state is greater than 3000Pa (in other words, the vacuum degree is too small), bubbles are easily generated in the ink layer, thereby affecting the appearance defect of the surface of the prepared ink layer 50. The air pressure in the vacuum state is less than 100Pa (in other words, the vacuum degree is too high), the air bubbles in the ink glue layer do not change greatly, but the requirement on equipment is greatly increased, and the preparation cost of the shell 100 is increased.

Further, after the texture imprinting is completed, curing is performed, so that the ink glue layer forms an ink layer 50, wherein the surface of the ink layer 50 away from the hardened layer 30 has the texture structure 51.

Optionally, the curing is photo-curing, the photo-curing comprising: a first stage of photocuring and a second stage of photocuring. The wavelength of the first section of photocuring is 365nm to 405nm, and the curing energy of the first section of photocuring is 300mj/cm²To 1500mj/cm². The wavelength of the second stage photocuring is 280nm to 405nm, and the curing energy of the second stage photocuring is 800mj/cm²To 2000mj/cm². Specifically, the sample was placed at a wavelength of 365nm to 405nm and a curing energy of 300mj/cm²To 1500mj/cm²Under the LED lamp, the first section of light curing is carried out, so that part of the second photoinitiator is decomposed, and the part of the polyurethane acrylate, the epoxy acrylate and the alkenyl-containing monomer are initiated to have higher activityPolymerizing the high functional groups to form a semi-cured printing ink layer; removing the texture mould; and a curing energy of 800mj/cm at a wavelength of 280nm to 405nm²To 2000mj/cm²The second stage of photo-curing is performed under the mercury lamp to decompose the remaining second photo-initiator and initiate polymerization of the remaining urethane acrylate, epoxy acrylate and other functional groups in the alkenyl-containing monomer, so that the ink glue layer is cured to form the ink layer 50.

Alternatively, the curing energy for the first stage photocuring can be, but is not limited to, 300mj/cm²、500mj/cm²、700mj/cm²、900mj/cm²、1100mj/cm²、1300mj/cm²、1500mj/cm²And the like. If the curing energy of the first stage photocuring is too small, the curing rate of the semi-cured ink layer is too low, and the film is difficult to tear when the texture mold is removed, and if the curing energy of the first stage photocuring is too high, the polymerization reaction speed is too high, the ink layer 50 generates too large shrinkage stress, and the ink layer is easy to crack in the using process. Alternatively, the wavelength of the first stage photocuring can be, but is not limited to, 365nm, 370nm, 380nm, 390nm, 400nm, 405nm, and the like.

Alternatively, the curing energy for the second stage photocuring can be, but is not limited to, 800mj/cm²、900mj/cm²、1000mj/cm²、1100mj/cm²、1200mj/cm²、1300mj/cm²、1400mj/cm²、1500mj/cm²、1800mj/cm²、2000mj/cm²And the like. The curing energy of the second stage photocuring is too low (less than 800 mj/cm)²) The ink layer 50 is not completely cured and has poor abrasion resistance; the curing energy of the second stage photocuring is too high (more than 2000 mj/cm)²) The curing rate of the ink layer 50 will not change much, but the production efficiency will be reduced and the production cost will be increased. Alternatively, the wavelength of the second stage photocuring can be, but is not limited to, 280nm, 290nm, 300nm, 320nm, 340nm, 365nm, 370nm, 380nm, 390nm, 400nm, 405nm, and the like.

For a detailed description of the ink layer 50, reference is made to the description of the corresponding parts of the above embodiments, which are not repeated herein.

The method for manufacturing the housing 100 of the present embodiment further includes: and (4) carrying out CNC machining on the shell 100, and milling off redundant leftover materials to obtain the shell 100 with the final required assembly matching size.

For the parts of this embodiment that are not described in detail and are the same as the parts of the above embodiment, please refer to the description of the above embodiment, and further description is omitted here.

According to the preparation method of the housing 100 of the embodiment of the application, the hardened layer 30 is formed on the surface of the housing body 10, the ink glue layer is printed in a printing mode through an inkjet printer, and finally the ink layer 50 is formed through texture imprinting and curing. Therefore, the formed ink layer 50 has changeable colorful patterns or gradual change colors through pattern design during printing, so that the designability of the colors and the patterns of the ink layer 50 is stronger, the appearance expressive force is better, and the requirements of consumers can be better met. Meanwhile, the ink layer 50 includes urethane acrylate and epoxy acrylate, and the epoxy acrylate can improve the hardness of the ink layer 50, so that the casing 100 has a high hardness while having changeable patterns and colors. Furthermore, the adhesion force of the ink adhesive layer on the hardened layer 30 is greater than the adhesion force of the ink adhesive layer on the housing body 10, and if the ink adhesive layer is directly formed on the surface of the housing body 10, the ink adhesive layer is not sufficiently cured during texture transfer, the bonding force between the ink adhesive layer and the housing body is insufficient, and the deviation is likely to occur during texture transfer, which affects the formation of the texture structure 51. Set up sclerosis layer 30 between printing ink layer 50 and casing body 10, can improve the adhesion of the printing ink layer 50 that forms, the better casing 100 that prevents to make takes place the layering in the use, and when can be better avoiding the texture transfer printing, the printing ink glue film takes place the skew.

Referring to fig. 7, an embodiment of the present application further provides a method for manufacturing a housing 100, which includes:

s301, providing a shell body 10;

s302, forming a hardened layer 30 on the surface of the housing body 10;

for detailed descriptions of step S301 and step S302, please refer to corresponding parts of the above embodiments, which are not described herein again.

S303, carrying out hot bending forming to form a shell body with a 3D structure;

optionally, a hot bending mold is adopted to perform hot bending for 0.3min to 2min under the conditions that the temperature is 130 ℃ to 240 ℃ and the pressure is 15Bar to 100Bar, so as to form the shell body with the 3D structure.

Optionally, the temperature of the hot bending forming is 130 ℃ to 240 ℃; specifically, the temperature may be, but not limited to, 130 ℃, 150 ℃, 160 ℃, 180 ℃, 200 ℃, 210 ℃, 230 ℃, 240 ℃ and the like.

Optionally, the pressure of the hot bending forming is 15Bar to 100 Bar; specifically, but not limited to, 15Bar, 20Bar, 30Bar, 40Bar, 50Bar, 60Bar, 70Bar, 80Bar, 90Bar, 100Bar, etc.

Optionally, the hot bending time is 0.3min to 2 min; specifically, it may be, but not limited to, 0.3min, 0.5min, 1min, 1.5min, 2min, etc.

S304, printing an ink adhesive layer on the surface of the hardened layer 30, which is far away from the shell body 10, wherein the ink adhesive layer comprises polyurethane acrylate and epoxy acrylate, and the ink adhesive layer has at least one color; and

for a detailed description of step S304, please refer to the corresponding parts of the above embodiments, which are not described herein again.

S305, stamping textures on the ink glue layer, and curing to enable the ink glue layer to form an ink layer 50, so as to obtain the shell 100, wherein the surface, away from the hardened layer 30, of the ink layer 50 has a texture structure 51.

Optionally, locate the lamination mould fold on the printing ink glue film the lamination mould is kept away from the surface of printing ink glue film is applyed and is predetermine atmospheric pressure to printing ink glue film is kept away from the surface of sclerosis layer forms texture 51, wherein, the surface that has the texture on the lamination mould faces the printing ink glue film. When the shell body is of a 3D structure, if the texture is imprinted by gravity or a rolling and pressing mode, bubbles are easily generated on the ink adhesive layer due to uneven stress, so that appearance defects are generated on the surface of the formed ink layer 50. And the texture mould is pressed through the pressure generated by air pressure, so that the stress of each position of the texture mould is more uniform, bubbles are not easy to generate during fitting, and the appearance defect of the surface of the formed printing ink layer 50 can be better avoided.

Optionally, the preset air pressure is 3bar to 10 bar; specifically, it may be, but is not limited to, 3bar, 4bar, 5bar, 6bar, 7bar, 8bar, 9bar, 10bar, and the like. If the preset air pressure is too small, the pressure is not enough, and the texture copying effect on the ink glue layer is not good; when the atmospheric pressure is too high, the case body 10 is easily deformed and warped, resulting in a variation in the 3D size of the manufactured case.

For the description of the same portions of step S305 as those of the above embodiment, please refer to the corresponding portions of the above embodiment, which are not repeated herein.

For the parts of this embodiment that are not described in detail and are the same as the parts of the embodiments, please refer to the description of the embodiments, and further description is omitted here.

Referring to fig. 8, an embodiment of the present application further provides a method for manufacturing a housing 100, which includes:

s401, providing the housing body 10;

s402, coating a hardening glue layer on the surface of the shell body 10, and curing to form a hardening layer 30 by the hardening glue layer;

s403, printing an ink adhesive layer on the surface of the hardened layer 30, which is far away from the shell body 10, by using ink, wherein the ink adhesive layer comprises polyurethane acrylate and epoxy acrylate, and the ink adhesive layer has at least one color;

s404, stamping textures on the ink glue layer to form a texture structure 51 on the surface, away from the hardened layer 30, of the ink glue layer;

s405, carrying out photocuring to enable the ink glue layer to form an ink layer 50, wherein the surface of the ink layer 50, which is far away from the hardened layer 30, is provided with the texture structure 51;

for detailed descriptions of steps S401 to S405, refer to corresponding parts of the above embodiments, which are not repeated herein.

S406, printing an identification part 70, such as a logo, on the surface of the housing body 10 facing away from the ink layer 50;

specifically, high-reflectivity ink such as mirror silver/mirror gold is adopted, logo is printed on the surface, away from the hardened layer 30, of the shell body 10 in a screen printing mode, and the shell body is baked for 45min to 80min at the temperature of 60 ℃ to 80 ℃.

S407, forming a color layer 20 on the surface of the identification part 70 away from the housing body 10 and the surface of the housing body 10 not covered by the identification part 70;

specifically, the color layer 20 is formed by spraying, offset printing or printing the raw material components of the color layer 20, and then setting the raw material components at a curing energy of 600mj/cm²To 800mj/cm²And carrying out light curing under the LED lamp. The raw material components of the color layer 20 comprise modified acrylate polyurethane resin, nano color paste, photoinitiator and the like.

S408, transferring photocuring glue on the side, away from the shell body 10, of the color layer 20, and curing to form a texture layer 40;

specifically, the light curing glue is transferred to the side of the color layer 20 away from the housing body 10, and the curing energy is 800mj/cm²To 2500mj/cm²Optionally, the texture layer 40 may be further cured at a curing energy of 550mj/cm²To 1500mj/cm²Consolidation (curing the light curable glue more completely) to improve the adhesion of the texture layer 40 to the color layer 20.

Optionally, the photocuring glue comprises urethane acrylate, a photoinitiator, a solvent and an auxiliary agent.

S409, forming a coating layer 60 on the surface of the texture layer 40 far away from the shell body 10; and

specifically, In/Sn, TiO are used₂、NbO₂、Nb₂O₃、Nb₂O₂、Nb₂O₅、SiO₂、ZrO₂Or at least one of other Non-conductive oxides as electroplating material, and forming the grooves by Non-conductive vacuum plating (NCVM)The top layer 40 is coated with a coating layer 60. In one embodiment, the plating layer 60 is an indium plating layer.

And S410, forming a cover bottom layer 80 on the surface of the coating layer 60 far away from the shell body 10.

Specifically, a cover bottom layer 80 is printed on the surface of the film coating layer 60 away from the housing body 10 by using a light-shielding ink having an absorbing or reflecting effect on light.

The sequence of steps S402 to S405 and steps S406 to S410 may be reversed, in other words, steps S406 to S410 may be performed before steps S402 to S405.

The housing 100 produced in the present application will be further described below by way of specific examples and comparative examples.

Examples 1, 2 and comparative example 1

The housings 100 of the present example and comparative example were manufactured by the following steps (the following fractions are weight fractions):

1) providing a shell body 10, wherein the shell body 10 is a PC/PMMA composite board, and the thickness of the composite board is 0.64mm, wherein the thickness of the PC layer is 0.59mm, and the thickness of the PMMA layer is 0.05 mm;

2) coating hardening liquid on the PMMA surface of the shell body 10 by spraying, and drying for 5min at 70 ℃ to form a hardening glue layer; the hardening liquid of example 1 includes 35% urethane acrylate, 2.5% TPO, and ethyl acetate; the hardening liquid of example 2 includes 35% urethane acrylate, 7% epoxy acrylate, 2.5% TPO, and ethyl acetate; the hardening liquid of comparative example 1 includes 35% urethane acrylate, 14% epoxy acrylate, 2.5% TPO, and ethyl acetate;

3) at a curing energy of 200mj/cm²To 1000mj/cm²Under mercury lamp, the hardened glue layer is cured to form a hardened layer30。

The case 100 of the present example and the comparative example had a hardened layer 30 having a thickness of 8 μm.

Examples 3 to 5, comparative examples 2 to 4

2) coating hardening liquid on the PMMA surface of the shell body 10 by spraying, and drying for 5min at 70 ℃ to form a hardening glue layer; wherein the hardening liquid comprises 35% of urethane acrylate, 7% of epoxy acrylate, 2.5% of TPO and ethyl acetate;

3) at a curing energy of 200mj/cm²To 1000mj/cm²Curing the hardened adhesive layer to form a hardened layer 30 under the mercury lamp of (1);

4) printing an ink glue layer on the surface of the hardened layer 30, which is far away from the shell body 10, by using ink; wherein the total weight of the urethane acrylate and the epoxy acrylate in the ink is 30%.

5) Impressing texture on the ink glue layer to form a texture structure 51 on the surface of the ink glue layer away from the hardened layer 30;

6) and carrying out light curing to enable the ink glue layer to form an ink layer 50.

The case 100 obtained in this example had a hardened layer 30 having a thickness of 8 μm; the thickness of the ink layer 50 was 18 μm.

The above examples and comparative examples were subjected to various performance tests, and the test results are shown in table 1 below.

1) And (3) wear resistance test: the appearance surface of the shell 100 is rubbed back and forth by using 0000# steel wool and a load of 1Kg, and the wear resistance of the shell 100 is stronger when the number of rubbing times is larger before the appearance surface of the shell 100 is scratched.

2) And (3) testing pencil hardness: the hardness of the 1kg pencil was measured using GB/T6739-.

3) And (3) testing the adhesive force: the housing 100 was subjected to a hundred grid test using ASTM D3359-17, specifically, the housing 100 was boiled in boiling water for 1 hour, 1mm × 1mm squares were evenly scribed with a hundred grid knife, and the degree of adhesion of the film layer to the housing body 10 was evaluated by evaluating the integrity of the inner film layer of the squares.

4) Ball drop height (impact test): manufacturing the shell body into a flat sheet with the size of 150mm multiplied by 73 mm; the samples of the above-mentioned embodiment and comparative example were respectively supported on a jig (four sides of the case were each supported by a jig 3mm high, the middle was suspended), a stainless steel ball with a weight of 110g was freely dropped from a certain height onto the surface of the case to be measured, five points in the four corners and the center of the case body were respectively measured, each point was measured 5 times until the case body was broken, and the height when the case body was broken was the ball drop height. The higher the ball drop height, the higher the impact strength of the shell, the better the toughness, and the less likely it will crack.

TABLE 1 Performance parameters of the examples and comparative examples

As can be seen from the test data of example 1, example 2 and comparative example 1 in table 1 above, the addition of the epoxy acrylate to the hardened layer 30 can increase the hardness of the hardened layer 30 and thus the hardness of the case 100, but when the content of the epoxy acrylate increases, the hardened layer 30 becomes brittle, and therefore, when the content of the epoxy acrylate is within 30% by weight of the urethane acrylate, the hardened layer 30 can be more well balanced in hardness and toughness. As can be seen from the test data of examples 3 to 5 and comparative examples 2 to 4 in table 1 above, when the total content of urethane acrylate and epoxy resin in the ink is fixed, the higher the occupancy of epoxy acrylate, the higher the hardness of the resulting case 100, the better the abrasion resistance, but the less the influence on the adhesion and the ball drop height.

Referring to fig. 9 to fig. 11, an embodiment of the present application further provides an electronic device 500, which includes: a display assembly 510, a housing 100 according to an embodiment of the present application, and a circuit board assembly 530. The display component 510 is for displaying; the housing 100 is used for carrying the display assembly 510; the circuit board assembly 530 is disposed between the display assembly 510 and the housing 100, and is electrically connected to the display assembly 510 for controlling the display assembly 510 to display. In some embodiments, the housing 100 has an accommodating space 101, the circuit board assembly 530 is located in the accommodating space 101, and the display assembly 510 is further configured to close the accommodating space 101; in other words, the housing 100 and the display module 510 enclose a closed accommodating space 101.

The electronic device 500 of the embodiment of the present application may be, but is not limited to, a portable electronic device such as a mobile phone, a tablet computer, a notebook computer, a desktop computer, a smart bracelet, a smart watch, an electronic reader, and a game console.

For a detailed description of the housing 100, please refer to the description of the corresponding parts of the above embodiments, which is not repeated herein.

Alternatively, the display module 510 may be, but is not limited to, one or more of a liquid crystal display module, a light emitting diode display module (LED display module), a micro light emitting diode display module (micro LED display module), a sub-millimeter light emitting diode display module (MiniLED display module), an organic light emitting diode display module (OLED display module), and the like.

Referring also to fig. 11, optionally, the circuit board assembly 530 may include a processor 531 and a memory 533. The processor 531 is electrically connected to the display component 510 and the memory 533, respectively. The processor 531 is configured to control the display component 510 to display, and the memory 533 is configured to store program codes required by the processor 531 to run, program codes required by the processor 510 to control the display component 510, display contents of the display component 510, and the like.

Alternatively, the processor 531 includes one or more general-purpose processors 531, wherein the general-purpose processor 531 may be any type of device capable of Processing electronic instructions, including a Central Processing Unit (CPU), a microprocessor, a microcontroller, a main processor, a controller, an ASIC, and the like. The processor 531 is configured to execute various types of digitally stored instructions, such as software or firmware programs stored in the memory 533, which enable the computing device to provide a wide variety of services.

Alternatively, the Memory 533 may include a Volatile Memory (Volatile Memory), such as a Random Access Memory (RAM); the Memory 533 may also include a Non-volatile Memory (NVM), such as a Read-Only Memory (ROM), a Flash Memory (FM), a Hard Disk (Hard Disk Drive, HDD), or a Solid-State Drive (SSD). Memory 533 may also comprise a combination of the above types of memory.

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

Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present application and not for limiting, and although the present application is described in detail with reference to the above preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present application without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A housing, comprising:

a housing body;

a hardened layer formed on a surface of the housing body; and

2. The housing of claim 1, wherein the ink layer has at least two colors or the ink layer is a gradient color.

3. The housing according to claim 1, wherein the raw material components of the hardened layer include urethane acrylate and a first photoinitiator; in the raw material components of the hardened layer, the weight fraction of the urethane acrylate is 30-40%, and the weight of the first photoinitiator is 0.5-3% of the weight of the urethane acrylate.

4. The case of claim 3, wherein the raw material composition of the hardened layer further comprises an epoxy acrylate and an alkenyl-containing monomer, the weight of the epoxy acrylate is 0% to 30% of the weight of the urethane acrylate, and the weight of the alkenyl-containing monomer is 0% to 5% of the weight of the urethane acrylate.

5. The shell according to claim 1, wherein the weight ratio of the urethane acrylate to the epoxy acrylate in the raw material components of the ink layer is 1:1 to 2: 1.

6. The shell of claim 5, wherein the raw material components of the ink layer further comprise an alkenyl-containing monomer, a colorant, a second photoinitiator; in the raw material components of the ink layer, the total parts of the polyurethane acrylate and the epoxy acrylate are 10-40 parts, the parts of the alkenyl-containing monomer are 40-75 parts, the parts of the second photoinitiator are 6-12 parts, and the parts of the pigment are 1-10 parts.

7. The housing of claim 1, wherein the dyne value of the hardened layer surface is greater than 36 dyn; the thickness of the hardening layer is 3-10 μm, the thickness of the ink layer is 5-25 μm, and the pencil hardness of the surface of the ink layer of the shell is 3-5H.

8. The casing of any one of claims 1 to 7, further comprising a color layer, a texture layer, a coating layer and a cover bottom layer, which are sequentially stacked on a side of the casing body facing away from the ink layer, wherein the color layer is disposed closer to the casing body than the cover bottom layer.

9. A method of making a housing, comprising:

providing a shell body;

forming a hardened layer on the surface of the shell body;

10. The method for manufacturing the housing according to claim 9, wherein printing an ink glue layer on a surface of the hardened layer facing away from the housing body comprises:

adopt printing ink the sclerosis layer deviates from the surface printing ink glue film of casing body, wherein, the viscosity of printing ink is 7mps to 30 mps.

11. The method for manufacturing the housing according to claim 9, wherein printing an ink glue layer on a surface of the hardened layer facing away from the housing body comprises:

adopt ink jet printer the sclerosis layer deviates from the surface printing ink glue film of casing body, ink jet printer includes the shower nozzle, the scope in aperture of shower nozzle is 5pl to 45pl, during the printing, the shower nozzle is 2mm to 30mm with the distance on sclerosis layer surface.

12. The method of manufacturing a housing of claim 9, wherein said impressing a texture onto said ink glue layer comprises:

and in a vacuum state, a texture mold is adopted, the surface of the ink glue layer far away from the hardened layer is imprinted with textures, wherein the air pressure in the vacuum state is 100Pa to 3000 Pa.

13. The method of manufacturing a housing according to any one of claims 9 to 12, wherein the curing is photo-curing, the photo-curing including:

a first stage of photocuring, wherein the wavelength of the first stage of photocuring is 365nm to 405nm, and the curing energy of the first stage of photocuring is 300mj/cm²To 1500mj/cm²(ii) a And

second-stage photocuring, wherein the wavelength of the second-stage photocuring is 280-405 nm, and the curing energy of the second-stage photocuring is 800mj/cm²To 2000mj/cm²。

14. The method for manufacturing a housing according to claim 9, wherein after the forming of the hardened layer on the surface of the housing body, before printing the ink paste layer on the hardened layer facing away from the surface of the housing body, the method further comprises:

and performing hot bending forming to form the shell body of the 3D structure.

15. The method of manufacturing a housing of claim 14, wherein said impressing a texture onto said ink glue layer comprises:

and overlapping a texture mould on the ink glue layer, and applying preset air pressure to the surface of the texture mould, which is far away from the ink glue layer, wherein the preset air pressure is 3-10 bar.

16. An electronic device, comprising:

a display component;

the housing of any one of claims 1 to 8 for carrying the display assembly; and