WO2018201347A1 - Mobile terminal, mobile terminal housing and preparation method therefor - Google Patents

Abstract

Disclosed are a mobile terminal housing, a preparation method and a mobile terminal. The mobile terminal housing comprises: a substrate; a colour layer provided on the substrate; a vacuum film coating layer provided on a pre-set region of the colour layer away from the substrate; a light finish coating layer provided on one side of the vacuum film coating layer away from the colour layer; and a matte finish coating layer provided on one side of the light finish coating layer away from the colour layer and the vacuum film coating layer, with the matte finish coating layer being arranged corresponding to a region of the colour layer, except for the pre-set region.

Description

Mobile terminal, mobile terminal housing and preparation method thereof Technical field

The present invention relates to the field of communication devices, and in particular, to a mobile terminal, a mobile terminal housing, and a method of fabricating the same.

Background technique

In recent years, metal casings have gradually replaced plastic and resin material casings, and are widely used in various electronic devices and mobile terminals. The appearance of the metal housing is more textured than the plastic housing. However, since an electronic device such as a mobile terminal needs to transmit a signal to realize its function of use, the current mobile terminal cannot fully adopt a housing formed of a metal material, but needs to be disposed in a metal formed housing. Non-metallic signal line. Instead of the metal signal line, the metal housing does not provide an overall visual effect. Another solution is to use a non-metallic substrate to obtain a metallic appearance by post-surface treatment. As a result, the requirements for signal transmission can be satisfied, and the appearance of the metal material can be obtained.

However, the current mobile terminal, mobile terminal housing and its preparation method still need to be improved.

Summary of the invention

This application is based on the discovery and recognition of the following facts and issues by the inventors:

The inventors have found that currently based on a non-metallic substrate, a mobile terminal housing for preparing a metal appearance, especially a housing having both a metallic bright surface and a metallic matte appearance, generally has a metallic appearance with poor appearance. problem. The inventors have conducted in-depth research and a large number of experiments and found that this is mainly due to the fact that when a metal-like casing is prepared using a substrate of a non-metallic material, the metal highlight portion and the metal blasting portion need to share a layer of lacquer. Therefore, the difference between the high-bright edge and the metal blasting texture is not obvious, and it is impossible to truly distinguish the above two appearance effects.

The present invention is directed to at least someeviating or solving at least one of the above mentioned problems.

In view of this, in one aspect of the present invention, the present invention provides a mobile terminal housing including: a base; a color layer, the color layer is disposed on the base; a vacuum coating layer, The vacuum coating layer is disposed on a predetermined area of the color layer away from the side of the substrate; a bright surface paint layer, the bright surface paint layer being disposed on a side of the vacuum coating layer away from the color layer; a matte finish layer, the matte finish layer disposed on a side of the glossy finish layer away from the color layer and the vacuum coating layer, the matte finish layer and the color layer being removed Portions other than the predetermined area are correspondingly arranged. As a result, a more realistic imitation metal blasting texture and a high-gloss side effect can be achieved.

According to an embodiment of the invention, the substrate is formed of plastic. Thereby, the performance of the mobile terminal housing can be further improved.

According to an embodiment of the invention, the vacuum coating layer is formed of a metal material. Thereby, the metallic texture of the mobile terminal casing can be further improved.

According to an embodiment of the invention, the metal material comprises at least one of indium and an indium tin alloy. Thereby, the metallic texture of the mobile terminal casing can be further improved.

According to an embodiment of the present invention, further comprising at least one of the following structures: a primer layer disposed between the color layer and the vacuum coating layer; a middle lacquer layer, the intermediate lacquer layer setting Between the vacuum coating layer and the glossy finish layer. Thereby, the metallic texture of the mobile terminal casing can be further improved.

According to an embodiment of the invention, the primer layer comprises 15-25% by weight of ethyl propionate, 65-75% by weight of polyurethane resin and 5-15% by weight of acrylic acid. Thereby, the performance of the mobile terminal housing can be further improved.

According to an embodiment of the invention, the intermediate lacquer layer comprises 15-25% by weight of ethyl propionate, 65-75% by weight of polyurethane resin and 5-15% by weight of acrylic acid. Thereby, the performance of the mobile terminal housing can be further improved.

According to an embodiment of the invention, the color layer is a matte color layer or a ceramic color layer. Thereby, the appearance effect of the mobile terminal casing can be further improved.

According to an embodiment of the invention, the color layer comprises 15-25 wt% alkyd resin, 35-45 wt% acrylic resin, 5-15 wt% epoxy resin, 3-7 wt% resin coated aluminum flakes, 8-12 wt% benzene. Ether and 10-20 wt% butanone. Thereby, the performance of the mobile terminal housing can be further improved.

In another aspect of the invention, the invention provides a method of preparing a mobile terminal housing as described above, the method comprising: forming a color layer on a substrate; forming a surface on a side of the color layer remote from the substrate a vacuum coating layer covering a surface of a predetermined region of the color layer; forming a glossy topcoat layer on a surface of the vacuum evaporation layer away from the color layer side; A matte topcoat layer is formed on the surface of the color layer and the side of the vacuum evaporation layer, and the matte finish layer is disposed corresponding to a portion of the color layer other than the predetermined region. Thereby, the mobile terminal housing described above can be easily obtained. This method can achieve a more realistic imitation metal sandblasting texture and high-brightness edge effect.

According to an embodiment of the invention, the vacuum coating layer is formed by a non-conductive vacuum plating process using a metal material. Thereby, the appearance of the bright side of the metal can be realized by the vacuum coating layer, which is advantageous for improving the gloss of the bright side of the metal of the mobile terminal housing.

According to an embodiment of the invention, the non-conductive vacuum plating treatment has a working vacuum of 5.0×10 ^-2 Pa, a coating vacuum of 8.0×10 ^-1 Pa, an evaporation power of 10-12 kw, and a plating time of 8-10 s. . Thereby, the performance of the mobile terminal housing can be further improved.

According to an embodiment of the present invention, the forming of the vacuum coating layer is achieved by forming a metal layer by a non-conductive vacuum plating process on a surface of the color layer away from the substrate side; performing the metal layer The laser engraving process removes the metal layer outside the predetermined region to form the vacuum coating layer and expose the color layer except the predetermined region. Thereby, the production efficiency can be improved, the cost can be reduced, and the effect of the metal-like sandblasting texture and the high-brightness edge effect can be realized.

According to an embodiment of the present invention, forming the matte finish layer is achieved by providing a matt paint on a surface of the glossy finish layer away from the color layer and the side of the vacuum evaporation layer Laminating the matte lacquer layer to remove the matte lacquer layer of a predetermined area to form the matte finish layer and exposing the glossy finish other than the predetermined area Floor. Since the laser engraving process removes the matte lacquer layer of the predetermined area, the vacuum coating layer for realizing the metal edge can be covered with the bright lacquer layer, and the matte color layer can be covered with the matte finish layer, and thus the vacuum The coating layer and the color layer do not share the topcoat, so that a more realistic imitation metal blasting texture and high-gloss edges can be achieved. effect.

According to an embodiment of the present invention, the method further includes at least one of the steps of: pre-forming a primer layer on the color layer before forming the vacuum coating layer; and performing laser engraving on the metal layer Previously, a medium lacquer layer was previously formed on the surface of the metal layer away from the side of the substrate. Thereby, the performance of the mobile terminal housing prepared by the method can be further improved.

According to an embodiment of the invention, the laser engraving process has a frequency of 8000-20000 Hz, an emission time of 55 μs, a filling method of single-line filling, a spacing between single lines of 0.05 mm, and a scanning speed of 900-1000 mm/s. Thereby, the performance of the mobile terminal housing can be further improved.

In still another aspect of the present invention, the present invention provides a mobile terminal. According to an embodiment of the invention, the mobile terminal comprises a mobile terminal housing as described above. Therefore, the mobile terminal has all the features and advantages of the mobile terminal housing described above, and details are not described herein again.

According to an embodiment of the invention, the mobile terminal is a mobile phone. Therefore, the mobile phone has all the features and advantages of the mobile terminal described above, and details are not described herein again.

According to an embodiment of the invention, the mobile terminal housing is a back shell of the mobile phone. Therefore, the back shell of the mobile phone has all the features and advantages of the mobile terminal housing described above, and details are not described herein.

DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from

1 shows a partial structural intent of a mobile terminal housing in accordance with one embodiment of the present invention;

2 shows the structural intent of a mobile terminal housing in accordance with one embodiment of the present invention;

3 is a flow chart showing a method of preparing a mobile terminal housing according to an embodiment of the present invention;

4 is a flow chart showing a method of manufacturing a mobile terminal housing according to another embodiment of the present invention;

FIG. 5 shows a schematic structural diagram of a mobile terminal according to an embodiment of the present invention.

Description of the reference signs:

100: substrate; 200: color layer; 300: vacuum coating layer; 400: glossy topcoat layer; 500: matte finish layer; 600: notch; 700: primer layer; 800: medium lacquer layer; Terminal housing; 1100: mobile terminal.

detailed description

Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

In one aspect of the invention, the present invention provides a mobile terminal housing. Referring to FIG. 1, the mobile terminal housing includes a base 100, a color layer 200, a vacuum coating layer 300, a glossy finish layer 400, and matte Topcoat layer 500. colour The layer 200 is disposed on the substrate 100; the vacuum coating layer 300 is disposed on a predetermined area of the color layer 200 away from the substrate 100; the bright surface paint layer 400 is disposed on a side of the vacuum coating layer 300 away from the color layer 200; matte surface The lacquer layer 500 is disposed on a side of the glossy topcoat layer 400 away from the color layer 200 and the vacuum coating layer 300, and the matte finish layer 500 is disposed corresponding to a portion of the color layer 200 other than the predetermined region. Wherein, the color layer 200 can realize the visual effect of the metal sandblasting texture or the ceramic texture; the vacuum evaporation layer 300 can be formed by the vacuum evaporation metal material, thereby providing the mobile terminal housing with the metallic high light visual effect, the glossy surface The locations covered by the topcoat layer 400 and the matte finish layer 500 are not identical. Thereby, it can be avoided that the color layer 200 and the vacuum coating layer 300 do not truly reflect the difference in brightness between the color layer 200 and the vacuum coating layer 300 because a layer of the lacquer layer is shared.

In the following, according to a specific embodiment of the present invention, the structure of each layer of the mobile terminal housing will be described in detail:

According to an embodiment of the present invention, the specific type of the above-described base 100 is not particularly limited as long as the design requirements of the mobile terminal housing can be satisfied. For example, it can be a plastic material.

According to an embodiment of the present invention, the vacuum coating layer 300 covers a predetermined area surface of the color layer 200. According to the embodiment of the present invention, the specific location of the predetermined area is not particularly limited, and those skilled in the art can design according to actual conditions. Thereby, the position at which the vacuum coating layer 300 forms a high-bright edge effect can be adjusted by adjusting the installation position of the vacuum coating layer 300, such as the coverage area and the shape of the vacuum coating layer 300. The position not covered by the vacuum coating layer 300 can expose the color layer 200, thereby obtaining a visual effect of a metal sandblasting texture or a ceramic texture. For example, the coverage position of the vacuum coating layer 300 can be controlled, and the color layer 200 is exposed in a portion other than the predetermined area to form a visual effect of a metal-like sandblasted texture or a ceramic texture, and the predetermined area can form a high-bright edge or a metal trademark. pattern.

The inventors have unexpectedly discovered that with the mobile terminal housing according to the embodiment of the present invention, not only a more realistic imitation metal blasting texture and a metallic highlight effect can be achieved, but the obtained matte effect contrast is more remarkable, and the production process can be simplified. Specifically, in order to realize the matte effect, the conventional mobile terminal housing generally adopts a color layer on the surface of the substrate to provide a matte effect, and then deposits the entire layer of metal, using the ink layer as a mask, and then needs to be realized. The position of the metal highlight effect is deplated to remove part of the metal layer. Specifically, after the deposition of the entire layer of metal is achieved, a portion of the surface of the substrate is printed using ink to utilize the printed ink as a mask for removing the vacuum coating layer. Then, the surface of the substrate on which the ink is printed is sprayed with a deplating solution to perform deplating treatment, so that the color layer not covered by the ink in the substrate is exposed, so as to realize the visual effect of metal blasting, and the metal layer is retained without the deplating portion. High light side effect. Then, the surface of the casing is sprayed with a fading liquid to perform a film-removing treatment to dissolve the ink printed on the surface of the substrate. Finally, the lacquer layer and the topcoat layer are sprayed on the entire surface of the above structure for protection. As can be seen from the comparison, such a mobile terminal housing requires multiple operations of spraying the wire body up and down, and involves multiple disassembly and assembly of the jig (when the ink layer or the intermediate paint layer is sprayed). Thereby, the production efficiency of the mobile terminal housing is seriously affected. Moreover, since the above structure exposes the color layer and the vacuum coating layer, after the ink layer is removed, an additional intermediate layer and a top layer are required. The color layer and the vacuum coating layer are protected. Since the above two-layer structure shares the middle lacquer layer and the top lacquer layer, the true matte effect cannot be obtained, that is, the contrast between the metal bright rim and the metal blasting effect is not sufficiently obvious.

In accordance with an embodiment of the present invention, the glossy finish layer 400 covers the surface of the vacuum coating layer 300, as well as the exposed color layer 200 (i.e., the surface of the portion outside the predetermined area), and the matte finish layer 500 covers the glossy finish layer. 400 is a portion outside the predetermined area. Thereby, the projection of the matte finish 500 on the color layer 200 can be made to coincide with the portion other than the predetermined region. The position not covered by the matte finish layer 500 can expose the glossy finish layer 400, thereby enhancing the high gloss side effect of the vacuum coating layer 300 described above. That is, the glossy topcoat layer 400 can be covered with the vacuum coating layer 300 that achieves the bright side of the metal, and the matte finish layer 500 covers the color layer 200 that achieves the matte effect, and thus the color layer 200 and the vacuum coating layer 300 are not The shared topcoat can achieve a more realistic imitation metal blasting texture and metallic highlight effect, and the contrast of the matte effect is more remarkable.

According to an embodiment of the present invention, the color layer 200 may be formed by spraying a paint. For example, in accordance with a particular embodiment of the present invention, color layer 200 has a metallic matte appearance or a ceramic white feel. For example, in accordance with a particular embodiment of the present invention, the color layer 200 can have the effect of a metal sandblasted texture. Thereby, the color layer 200 can be individually selected, and the appearance effect of the mobile terminal housing can be further improved. The specific type of the material of the color layer 200 is not particularly limited as long as the above-described appearance effect can be achieved. For example, the color layer 200 may be disposed at the center of the mobile terminal housing, so that a housing panel having a metal blasting texture can be obtained. The degree of matte exhibited by the color layer 200 can be adjusted by changing the color lacquer composition constituting the color layer 200. Specifically, the color lacquer constituting the color layer 200 may be composed of 15-25 wt% alkyd resin, 35-45 wt% acrylic resin, 5-15 wt% epoxy resin, 3-7 wt% resin-wrapped aluminum flakes, and 8-12 wt% benzene. Ether, 10-20 wt% butanone and the like.

According to an embodiment of the present invention, the vacuum coating layer 300 is formed of a metal material. Thereby, the visual effect of the metal highlight can be formed by the vacuum plating layer 300. According to an embodiment of the present invention, the specific formation manner of the vacuum coating layer 300 is not particularly limited. For example, according to a specific embodiment of the present invention, the color layer 200 may be utilized, including but not limited to non-conductive vacuum evaporation (NCVM). The vapor deposition metal target is formed. Those skilled in the art can understand that the metal material forming the vacuum vacuum coating layer 300 is the metal target used in the NCVM. The specific type of the metal target is not particularly limited, and according to an embodiment of the present invention, the metal material includes at least one of indium and indium tin alloy. The inventors have found that when the vacuum coating layer 300 is prepared using the above metal material, it does not adversely affect the signal transmission function of the mobile terminal housing. For example, according to a specific embodiment of the present invention, the vacuum plating layer 300 may be formed using indium having a purity of 99.99 wt%, and the vapor deposition quality may be 3.5 to 4.0 g. The inventors have found through extensive experiments that when the mass of the vapor-deposited metal material is within the above range, the formed vacuum coating layer 300 has a good metallic luster. Specifically, for most sizes of the mobile phone case, the vacuum coating layer 300 formed by the evaporation quality in the above range may have a relatively appropriate thickness, so that the target is not excessively thick due to the thickness of the vacuum coating layer 300. The waste of the material does not affect the metallic feel of the vacuum coating layer 300 due to insufficient thickness of the vacuum coating layer 300.

According to an embodiment of the present invention, referring to FIG. 2, in order to further improve the appearance and durability of the mobile terminal housing According to an embodiment of the present invention, the mobile terminal housing may further include a primer layer 700. In accordance with an embodiment of the present invention, a primer layer 700 is disposed between the color layer 200 and the vacuum coating layer 300. The primer layer 700 can cover the surface layer of the color layer 200 and enhance the adhesion of the color layer 200, functioning as a carrier of the vacuum coating layer 300. Thereby, the durability of the mobile terminal casing can be improved, and the vacuum coating layer 300 can be prevented from being peeled off during use. According to the embodiment of the present invention, the material forming the primer layer 700 described above is not particularly limited as long as it can cover the surface 瑕疵 of the color layer 200 and enhance the adhesion of the color layer 200 to the vacuum coating layer 300. For example, the primer layer 700 may be formed using 15-25% by weight of ethyl propionate, 65-75% by weight of a urethane resin, and 5-15% by weight of acrylic acid. The primer layer 700 can be transparent.

According to an embodiment of the present invention, the vacuum coating layer 300 can be obtained by first depositing a layer of metal on the primer layer 700 and then removing the metal other than the predetermined region by a method including, but not limited to, laser engraving. Referring to FIG. 2, in order to further improve the durability of the vacuum coating layer 300 and improve the laser engraving effect, the mobile terminal housing may further include a middle lacquer layer 800, in accordance with an embodiment of the present invention. In accordance with a particular embodiment of the invention, the intermediate lacquer layer 800 is disposed over the vacuum coating layer 300. That is to say, the middle lacquer layer 800 is disposed between the glossy topcoat layer 400 and the vacuum coating layer 300. The specific type of the material of the above-mentioned intermediate lacquer layer 800 is not particularly limited as long as the vacuum coating layer 300 can be protected and facilitated by laser engraving. For example, the medium lacquer layer 800 may be composed of 15-25% by weight of ethyl propionate, 65-75% by weight of a urethane resin, and 5-15% by weight of acrylic acid. Thereby, the effect of using the laser engraving can be improved, and the vacuum vapor deposition layer 300 remaining due to the incomplete laser engraving can be prevented from affecting the appearance effect of the exposed color layer 200. Since the middle lacquer layer 800 is colorless and transparent, the metal layer can be deposited on the primer layer, but before the vacuum coating layer 300 is formed by laser engraving, the intermediate lacquer layer 800 is previously provided on the metal layer, and then Laser engraving. Referring to FIG. 2, since the middle lacquer layer 800 is colorless and transparent, the laser engraving process does not etch away the intermediate lacquer layer 800 except for the predetermined area, but removes the underlying lacquer layer and removes the area other than the predetermined area. The metal layer forms a notch 600 while forming the vacuum plating layer 300. That is, the notch 600 is provided in a portion of the vacuum evaporation layer 300 excluding a predetermined region.

In accordance with an embodiment of the present invention, a glossy finish lacquer layer 400 is disposed on a side of the vacuum coating layer 300 that is remote from the color layer 200. In accordance with an embodiment of the present invention, the glossy finish lacquer layer 400 can enhance the high gloss side effect of the vacuum evaporated layer 300 and can protect the underlying coating (e.g., vacuum evaporated layer 300). According to an embodiment of the present invention, the specific type of material of the above-described glossy topcoat layer 400 is not particularly limited.

According to an embodiment of the present invention, the matte finish layer 500 is disposed on a side of the glossy topcoat layer 400 away from the color layer 200 and the vacuum coating layer 300, and the matte finish layer 500 and the color layer 200 are apart from the predetermined region. Corresponding settings. In accordance with an embodiment of the present invention, the matte finish layer 500 can enhance the matte effect of the color layer 200 and can protect the underlying coating (e.g., color layer 200). According to an embodiment of the present invention, the specific type of material of the above matte topcoat layer 500 is not particularly limited.

As described above, the mobile terminal housing according to the embodiment of the present invention has a bright finish paint layer 400 and matte The topcoat layer 500, therefore, avoids the color layer 200 and the vacuum coating layer 300 sharing a topcoat layer, so that the contrast of the matte effect between the color layer 200 and the vacuum coating layer 300 can be greatly improved. That is, the glossy topcoat layer 400 can be covered with a vacuum coating layer 300 that achieves a bright side of the metal, and the matte finish layer 500 covers the color layer 200 that achieves a matte effect, and the color layer 200 and the vacuum coating layer 300 are not shared. The topcoat can achieve a more realistic imitation metal sandblasting texture and metallic highlight effect, and the contrast of the matte effect is more remarkable. In addition, the structure avoids spraying the ink layer or the intermediate paint layer multiple times, thereby reducing the operation of the upper and lower sprayed wire bodies, thereby improving production efficiency.

According to a specific embodiment of the present invention, the matte brightness of the mobile terminal housing is tested, and the test results show that the metal highlight (glossy) and the matte effect (matte) have different brightness differences according to an embodiment of the present invention. Can achieve a more obvious contrast effect. Specifically, the German BYK micro three-angle gloss meter (model 4446) is used to light the surface of the mobile terminal housing (such as point B shown in FIG. 2) and the matte surface according to the embodiment of the present invention (as shown in FIG. 2). The brightness of point A shown) was tested. At three different incident angles, the difference in brightness between point A and point B is significant. Specifically, the glossy surface of the mobile terminal housing according to the embodiment of the present invention (point B shown in the figure) has a gloss of 1200-1250 (GU) at an incident angle of 20 degrees, and a matte surface (such as The point A shown in the figure) is only 6-10 (GU) when the incident angle is 20 degrees. When the incident angle is 60 degrees, the gloss of the glossy surface is about 600-620 (GU), and the gloss of the matte surface is less than 30 (GU). When the incident angle is 80 degrees, the gloss of the glossy surface is measured to be about 115-130 (GU), and the gloss of the matte surface is only 45-55 (GU). The comparison shows that when the incident angle is the same, the brightness of the smooth surface (point B) is significantly higher than that of the matte surface (point A).

In another aspect of the invention, the invention proposes a method of making a mobile terminal housing as described above. According to an embodiment of the present invention, referring to FIG. 3, the method includes:

S100: forming a color layer

According to an embodiment of the invention, in this step, a color layer is formed on the substrate. The specific materials of the substrate have been described in detail above and will not be described again. The material, function, position, and achievable appearance of the color layer have been described in detail above and will not be described herein. The specific method of forming the color layer is also not particularly limited. For example, an automatic compressed air spray technique may be employed to spray a color lacquer material forming a color layer on the surface of the vacuum coating layer. For example, in accordance with a particular embodiment of the present invention, the painted paint may be a silver metallic paint material having a metallic frosting effect. It will be understood by those skilled in the art that after the paint is sprayed, it can be subjected to a film forming treatment. The film formation conditions may be a leveling time of 4-6 min, a baking temperature of 75-85 degrees Celsius, and a time of 10-15 min. The viscosity of the paint can be 8.5-9.5 s (NK-2, sec / 25 ° C) (using Iwata NK-2 cup, at 25 ° C, the lacquer flows through the cup for 7.5-8.5 s). The film layer finally formed may have a film thickness of 4 to 8 μm.

According to an embodiment of the present invention, in order to further improve the effect of the vacuum coating, before performing the subsequent steps (such as forming a vacuum coating layer), referring to FIG. 4, the method may further include:

S10: forming a primer layer

According to an embodiment of the invention, in this step, a primer layer is formed on the surface of the color layer. Thereby, the surface layer of the color layer can be covered and the adhesion of the vacuum coating layer can be enhanced to function as a carrier of the vacuum coating layer. Thereby, the durability of the mobile terminal casing can be improved, and the vacuum coating layer can be prevented from peeling off during use. The specific material of the primer layer has been described in detail above and will not be described herein. The specific method of forming the primer layer and the operating parameters are also not particularly limited, and those skilled in the art can adjust according to actual conditions. For example, in accordance with a particular embodiment of the invention, the primer layer can be formed by spraying a clear primer. Specifically, a colorless transparent primer can be sprayed using an automatic compressed air spray technique. Subsequently, the primer sprayed on the substrate is subjected to a film forming treatment. The film formation conditions may be a leveling time of 3-5 minutes, a baking temperature of 50-55 degrees Celsius, and a time of 4-6 minutes. Subsequently, UV curing treatment is carried out, the energy of the UV curing treatment may be 700-800 mj/cm ² , and the viscosity of the lacquer may be 7.5-8.5 s (NK-2, sec / 25 ° C) (using Iwata NK-2 cup, at 25 At celsius, the paint flows through the cup for 7.5-8.5 s). The film thickness of the formed primer layer may be 12-20 μm.

S200: forming a vacuum coating layer

According to an embodiment of the present invention, in this step, a vacuum plating layer is formed on the surface of the color layer away from the side of the substrate, and the vacuum plating layer covers the surface of the predetermined region of the color layer. According to a specific implementation of the present invention, the vacuum coating layer may be formed by a non-conductive vacuum plating treatment using a metal material. Thereby, the appearance of the bright side of the metal can be realized by the vacuum coating layer, which is advantageous for improving the gloss of the bright side of the metal of the mobile terminal housing. The specific materials, formation manner, function, position, and achievable appearance effect of forming the vacuum coating layer have been described in detail above and will not be described herein. For example, according to a specific embodiment of the present invention, the process conditions of the vacuum coating may be: a working vacuum of 5.0×10 ^-2 Pa, a coating vacuum of 8.0×10 ^-1 Pa, an evaporation power of 10-12 kw, and a coating time of 8-10s. The coating material may be 99.99% indium and the mass is 3.5-4.0 g.

According to an embodiment of the present invention, referring to FIG. 4, forming a vacuum coating layer may be achieved by the following steps:

S210: depositing a metal layer

According to an embodiment of the present invention, in this step, a metal layer is formed by a non-conductive vacuum plating process on a surface of the color layer away from the substrate side. The metal layer has all the features and advantages of the vacuum evaporation layer described above, and will not be described herein.

S220: performing laser engraving on the metal layer

According to an embodiment of the present invention, in this step, the metal layer is subjected to a laser engraving process to remove a metal layer other than the predetermined region to form a vacuum plating layer, and to expose a color layer other than the predetermined region. Thereby, the imitation metal blasting texture and the high-brightness edge effect can be achieved. Specifically, the metal layer of the portion other than the predetermined region on the substrate is removed, whereby the color layer of the portion other than the predetermined region can be exposed to form a matte effect. Alternatively, a metal layer having a predetermined shape may be protected in the center of the substrate by providing a predetermined region of the laser laser engraving, and the metal layer (ie, the vacuum coating layer) which is not removed by the predetermined region may be formed in the center of the substrate. Metallic logo pattern that saves on the placement of trademark hardware. Thereby, production efficiency can be improved and cost can be reduced. The specific parameters of the laser engraving treatment are not particularly limited, and those skilled in the art can select according to actual conditions. For example, the conditions of the laser engraving may be: frequency 8000-20000, emission time 55 μs, filling method may be single line filling, the spacing between single lines may be 0.05 mm, and the scanning speed is 900-1000 mm/s.

According to an embodiment of the present invention, in order to further improve the performance of the vacuum coating layer, before performing the laser engraving process after depositing the metal layer, referring to FIG. 4, the method may further include:

S20: forming a medium paint layer

According to an embodiment of the present invention, in this step, a middle lacquer layer is formed on the surface of the metal layer away from the substrate before the laser etching process on the metal layer. Thereby, the performance of the mobile terminal housing prepared by the method can be further improved. The material and function of the middle lacquer layer have been described in detail above and will not be described again here. For example, in accordance with a particular embodiment of the present invention, the intermediate lacquer layer can be formed by spray-transparent protective lacquer using an automated compressed air spray technique. After spraying the paint, the medium paint can be film-formed. The film formation conditions are a 3-5 min leveling time, a baking temperature of 50-55 degrees Celsius, and a time of 4-6 minutes. Subsequently, it can be subjected to a UV curing treatment. The curing energy can be 500-600 mj/cm ² and the medium lacquer viscosity is 7.5-8.5 s (NK-2, sec / 25 ° C). The film thickness of the finally formed intermediate lacquer layer may be 12-18 μm. Thereby, the effect of using the laser engraving can be improved, and the residual effect of the color layer due to the incomplete laser engraving can be prevented, and the appearance effect of the exposed vacuum coating layer can be affected. As previously mentioned, those skilled in the art will appreciate that since the intermediate paint layer is colorless and transparent, the laser engraving process does not remove the intermediate paint layer, but removes the position of the metal layer other than the predetermined area. Therefore, after the lacquer layer is applied, the laser engraving process forms a gap in the metal layer, and the remaining metal layer is a vacuum coating layer.

S300: Forming a glossy finish

According to an embodiment of the present invention, in this step, a glossy finish layer is formed on the surface of the vacuum evaporation layer away from the side of the color layer. According to an embodiment of the present invention, the glossy finish layer layer can enhance the high gloss side effect of the vacuum evaporation layer, and can protect the underlying coating layer (such as a vacuum evaporation layer), thereby further improving the mobile terminal housing prepared by the method. Performance. The specific materials and functions of the bright finish paint layer have been described in detail above and will not be described herein. In accordance with a particular embodiment of the invention, the glossy finish may be formed by spraying a topcoat using an automated compressed air spray technique.

S400: Forming a matte finish

According to an embodiment of the present invention, in this step, a matte finish layer is formed on the surface of the bright finish layer away from the color layer and the side of the vacuum evaporation layer, and the matte finish layer and the color layer are divided by the predetermined area. The other parts correspond to the settings. Thereby, the mobile terminal housing described above can be easily obtained. According to an embodiment of the present invention, the matte finish layer can enhance the matte effect of the vacuum evaporation layer, and can protect the underlying coating (such as a color layer), thereby further improving the performance of the mobile terminal housing prepared by the method. . The specific materials and functions of the matte finish layer have been described in detail above and will not be described herein. In accordance with a particular embodiment of the invention, the matte finish layer can be formed by spraying a topcoat using an automated compressed air spray technique.

According to an embodiment of the present invention, referring to FIG. 4, forming a matte finish layer may be achieved by the following steps:

S410: coated matt paint layer

According to an embodiment of the present invention, in this step, a matte lacquer layer is provided on the surface of the bright topcoat layer away from the color layer and the side of the vacuum evaporation layer. The matte lacquer layer has all of the features and advantages of the matte finish layer described above and will not be described again.

S420: Laser engraving of the matt lacquer layer

According to an embodiment of the present invention, in this step, the matte lacquer layer is subjected to a laser engraving process to remove the matte lacquer layer of the predetermined area to form a matte finish layer and expose a glossy finish other than the predetermined area. Floor. Since the laser engraving process removes the matte lacquer layer of the predetermined area, the vacuum coating layer for realizing the metal bright side can be covered with the bright lacquer layer, and The matte color layer covers the matte finish layer, and the vacuum coating layer and the color layer do not share the topcoat, so that a more realistic imitation metal sandblasting texture and a high-gloss edge effect can be achieved. Specifically, the matte lacquer layer of the predetermined area on the substrate is removed, whereby a bright surface finish layer of a portion other than the predetermined area can be exposed, and the effect of highlighting the bright side is enhanced. Alternatively, a matte lacquer layer having a certain shape may be removed in the center of the substrate by providing a laser-filled area of the laser laser engraving, thereby exposing a glossy lacquer layer forming a trademark pattern in the center of the substrate, thereby enhancing the metallic texture of the logo pattern. . Thereby, production efficiency can be improved and cost can be reduced. The specific parameters of the laser engraving treatment are not particularly limited, and those skilled in the art can select according to actual conditions. The laser engraving process may have the same features and advantages as those described above for the laser engraving of the color lacquer layer, and will not be described herein.

In yet another aspect of the present invention, the present invention provides a mobile terminal 1100. According to an embodiment of the present invention, referring to FIG. 5, the mobile terminal 1100 includes the mobile terminal housing 1000 previously described. Therefore, the mobile terminal 1100 has all the features and advantages of the mobile terminal housing 1000 described above, and details are not described herein again.

It should be noted that the specific type of the mobile terminal is not particularly limited, and may be, for example, a mobile phone, a tablet computer, a notebook computer, or the like. In the mobile terminal, the specific shape of the mobile terminal housing is also not particularly limited. For example, taking a mobile phone as an example, the mobile terminal housing may only include a backboard, and the backboard may have a certain arc (3D back shell) or a flat sheet material without curvature. Alternatively, the mobile terminal housing may also be an integrally formed housing that includes both the back shell portion and the side border of the handset. The matte effect of the mobile terminal housing and the specific position of the metal highlight effect (not shown) are not particularly limited, and those skilled in the art can select according to actual needs. For example, the side may be set to a metallic highlight effect, or a metallic highlight logo may be placed in the center of the back shell, and the like.

In the description of the present invention, it is to be understood that the orientations or positions of the terms "upper", "lower", "front", "back", "top", "bottom", "inner", "outside", etc. are understood. The relationship is based on the orientation or positional relationship shown in the drawings, and is merely for the convenience of the description of the invention and the simplification of the description, and does not indicate or imply that the device or component referred to has a specific orientation, is constructed and operated in a specific orientation, and thus It is not to be understood as limiting the invention.

It should be further noted that the specific technical features described in the above specific embodiments may be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present invention has various possibilities. The combination method will not be described separately.

In addition, any combination of various embodiments of the invention may be made as long as it does not deviate from the idea of the invention, and it should be regarded as the disclosure of the invention.

Claims (19)

1. A mobile terminal housing, comprising:

   Matrix

   a color layer, the color layer being disposed on the substrate;

   a vacuum coating layer, the vacuum coating layer being disposed on a predetermined area of the color layer away from the side of the substrate;

   a glossy topcoat layer disposed on a side of the vacuum coating layer away from the color layer;

   a matte finish layer, the matte finish layer disposed on a side of the glossy finish layer away from the color layer and the vacuum coating layer, the matte finish layer and the color layer being removed Portions other than the predetermined area are correspondingly arranged.
2. The mobile terminal housing according to claim 1, wherein said base body is formed of plastic.
3. The mobile terminal housing according to claim 1, wherein the vacuum coating layer is formed of a metal material.
4. The mobile terminal housing according to claim 3, wherein the metal material comprises at least one of indium and indium tin alloy.
5. The mobile terminal housing according to claim 1, further comprising at least one of the following structures:

   a primer layer, the primer layer being disposed between the color layer and the vacuum coating layer;

   a middle lacquer layer disposed between the vacuum coating layer and the glossy finish layer.
6. The mobile terminal housing according to claim 5, wherein the primer layer comprises 15 to 25 wt% of ethyl propionate, 65 to 75 wt% of a urethane resin, and 5 to 15 wt% of acrylic acid.
7. The mobile terminal housing according to claim 5, wherein the intermediate lacquer layer comprises 15 to 25 wt% of ethyl propionate, 65 to 75 wt% of a urethane resin, and 5 to 15 wt% of acrylic acid.
8. The mobile terminal housing according to claim 1, wherein the color layer is a matte color layer or a ceramic color layer.
9. The mobile terminal housing according to claim 1, wherein the color layer comprises 15-25 wt% alkyd resin, 35-45 wt% acrylic resin, 5-15 wt% epoxy resin, 3-7 wt% resin. Wrap aluminum sheet, 8-12 wt% phenyl ether and 10-20 wt% butanone.
10. A method of manufacturing the mobile terminal housing according to any one of claims 1-9, comprising:

    Forming a color layer on the substrate;

    Forming a vacuum coating layer on a surface of the color layer away from the side of the substrate, the vacuum coating layer covering a surface of a predetermined region of the color layer;

    Forming a glossy finish on the surface of the vacuum evaporation layer away from the side of the color layer;

    Forming a matte finish layer on a surface of the bright finish layer away from the color layer and the side of the vacuum evaporation layer, the matte finish layer corresponding to a portion of the color layer other than the predetermined area Settings.
11. The method according to claim 10, wherein said vacuum coating layer is formed by using a metal material Formed without conductive vacuum plating.
12. The method according to claim 11, wherein the non-conductive vacuum plating treatment has a working vacuum of 5.0×10 ^-2 Pa, a coating vacuum of 8.0×10 ^-1 Pa, and an evaporation power of 10-12 kW, coating. The time is 8-10s.
13. The method according to claim 10, wherein the forming of the vacuum coating layer is achieved by the following steps:

    Forming a metal layer on the surface of the color layer away from the side of the substrate by a non-conductive vacuum plating process;

    The metal layer is subjected to a laser engraving process to remove the metal layer other than the predetermined region to form the vacuum coating layer and expose the color layer other than the predetermined region.
14. The method of claim 10 wherein forming said matte finish layer is accomplished by the following steps:

    Forming a matte lacquer layer on a surface of the bright finish layer away from the color layer and the side of the vacuum evaporation layer;

    The matte lacquer layer is subjected to a laser engraving process to remove the matte lacquer layer of a predetermined area to form the matte finish layer and expose the bright finish lacquer layer except the predetermined area.
15. The method of claim 13 further comprising at least one of the following steps:

    Forming a primer layer on the color layer before forming the vacuum coating layer;

    Before the laser etching treatment of the metal layer, a middle lacquer layer is formed on the surface of the metal layer away from the side of the substrate.
16. The method according to claim 13, wherein the laser engraving process has a frequency of 8000-20000 Hz, an emission time of 55 μs, a filling method of single-line filling, a spacing between single lines of 0.05 mm, and a scanning speed of 900-1000 mm/ s.
17. A mobile terminal, comprising the mobile terminal housing of any one of claims 1-9.
18. The mobile terminal of claim 17, wherein the mobile terminal is a mobile phone.
19. The mobile terminal of claim 17, wherein the mobile terminal housing is a back shell of the mobile phone.

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