CN110650602B - Appearance piece, surface treatment method thereof and electronic equipment - Google Patents
Appearance piece, surface treatment method thereof and electronic equipment Download PDFInfo
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- CN110650602B CN110650602B CN201910833867.8A CN201910833867A CN110650602B CN 110650602 B CN110650602 B CN 110650602B CN 201910833867 A CN201910833867 A CN 201910833867A CN 110650602 B CN110650602 B CN 110650602B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0217—Mechanical details of casings
- H05K5/0243—Mechanical details of casings for decorative purposes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
- B44C3/00—Processes, not specifically provided for elsewhere, for producing ornamental structures
- B44C3/02—Superimposing layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
- B44C5/00—Processes for producing special ornamental bodies
- B44C5/04—Ornamental plaques, e.g. decorative panels, decorative veneers
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- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The application mainly relates to an appearance piece, a surface treatment method thereof and electronic equipment, wherein the method comprises the following steps: coating a photo-curing coating on the surface of the substrate; carrying out light treatment on the photocuring coating so that the photocuring coating is cured on the surface of the substrate to form a cured layer; heating the cured layer to enable the cured layer to expand to form a crack structure; and coating a filler on the surface of the cured layer, wherein the filler is filled in the cracks of the cured layer. The embodiment of the application develops a new way to separate the curing process of the photocureable coating from the adding process of the filler, namely, the photocureable coating is added after being cured, so that the curing process of the photocureable coating is not influenced by the filler, the curing effect of the photocureable coating can be ensured, the selectivity of the filler in the aspects of types, concentration, particle sizes and the like can be increased, and the surface treatment effect of an appearance part and the application range of the photocureable coating are further increased.
Description
Technical Field
The application relates to the technical field of electronic equipment, in particular to an appearance piece, a surface treatment method of the appearance piece and the electronic equipment.
Background
Photo-curable Coating (photo curable Coating) mainly comprises oligomers, photo-initiators, reactive diluents and various additives, generally high-energy ultraviolet light is used as curing energy, the photo-initiators in the Coating absorb the ultraviolet light to generate free radicals or cations, and the polymerization and crosslinking reactions of the oligomers and the reactive diluents are initiated, so that a paint film is formed through hardening. The photo-curing paint film is of a three-dimensional structure, has the characteristics of high hardness, good wear resistance, high transparency and the like, and can effectively improve the surface performance of a matrix.
The hardened paint film formed by the traditional light-cured paint is in a transparent state, and can improve the surface performance of a substrate, but a primer (or a colored paint) needs to be sprayed to enable the substrate to have different colors, namely, at least two times of spraying are needed to meet the use requirements of the surface performance and various colors.
Disclosure of Invention
The embodiment of the application provides a surface treatment method for an appearance piece of electronic equipment, wherein the method comprises the following steps: coating a photo-curing coating on the surface of the substrate; carrying out light treatment on the photocuring coating so that the photocuring coating is cured on the surface of the substrate to form a cured layer; heating the cured layer to enable the cured layer to expand to form a crack structure; and coating a filler on the surface of the cured layer, wherein the filler is filled in the cracks of the cured layer.
The embodiment of the application also provides an appearance piece for the electronic equipment, wherein the appearance piece comprises a base body and a cured layer attached to the base body, and the cured layer is filled with filler.
The embodiment of the application further provides electronic equipment, wherein, this electronic equipment includes display module assembly and outward appearance piece, outward appearance piece and display module assembly connection.
The beneficial effect of this application is: the surface treatment method for the appearance piece of the electronic equipment comprises the following steps: coating a photo-curing coating on the surface of the substrate; carrying out light treatment on the photocuring coating so that the photocuring coating is cured on the surface of the substrate to form a cured layer; heating the cured layer to enable the cured layer to expand to form a crack structure; and coating a filler on the surface of the cured layer, wherein the filler is filled in the cracks of the cured layer. Compared with the mode of adding the filler to the photocureable coating in advance in the related art, the embodiment of the application separates the curing process of the photocureable coating from the adding process of the filler, namely, the filler is added after the photocureable coating is cured, so that the curing process of the photocureable coating is not influenced by the filler, the curing effect of the photocureable coating can be ensured, the selectivity of the filler in the aspects of type, concentration, particle size and the like can be increased, and the surface treatment effect of an appearance piece and the application range of the photocureable coating are further increased.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic flowchart of an embodiment of a surface treatment method for an appearance member of an electronic device provided in the present application;
FIG. 2 is a schematic flow chart illustrating a surface treatment method for an external appearance member of an electronic device according to another embodiment of the present disclosure;
FIG. 3 is a schematic flow chart diagram illustrating a surface treatment method for an external appearance member of an electronic device according to yet another embodiment of the present disclosure;
FIG. 4 is a schematic flow chart illustrating a surface treatment method for an external appearance member of an electronic device according to still another embodiment of the present disclosure;
FIG. 5 is a schematic cross-sectional view of an embodiment of an appearance piece for an electronic device provided herein;
fig. 6 is a schematic cross-sectional structure diagram of an embodiment of an electronic device provided in the present application.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be noted that the following examples are only illustrative of the present application, and do not limit the scope of the present application. Likewise, the following examples are only some examples and not all examples of the present application, and all other examples obtained by a person of ordinary skill in the art without any inventive work are within the scope of the present application.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
The inventors of the present application have found, through long-term research: compared with the traditional common spraying mode of 'primer-colored paint-photocuring finish paint', the existing photocuring solid-color spraying mode can pre-mix colored paint and photocuring finish paint and only carry out one-time spraying, so that the spraying process and the coating structure can be simplified, and the spraying cost can be reduced; however, the photo-curing solid color spray coating method has a disadvantage that the pigment added in advance in the photo-curing coating affects the penetration and absorption effect of ultraviolet light, thereby affecting the curing characteristics of the photo-curing coating. Therefore, in order to satisfy both the curing characteristics and color requirements of the photocurable coating material, the type, concentration, particle size, and the like of the pigment added to the photocurable coating material are generally strictly limited, which makes it easy to limit the applicable range of the photocurable coating material. In this regard, the present application proposes the following examples.
Referring to fig. 1, fig. 1 is a schematic flowchart illustrating a surface treatment method for an appearance piece of an electronic device according to an embodiment of the present disclosure. The method comprises the following steps:
s101: and coating the surface of the substrate with a photocuring coating.
It should be noted that the base body described in the embodiment of the present application may correspond to a blank member of which the surface treatment has not been performed on the exterior member. The material of the substrate may be metal such as stainless steel and aluminum alloy, plastic such as polycarbonate, polycarbonate containing glass fiber or carbon fiber, or various tempered glass. Furthermore, the appearance part can be one or more of a rear cover plate, a frame, a camera lifting support and an entity key of the electronic equipment, and can also be other structural parts applied to the electronic equipment. The physical keys may be power keys, volume keys, AI keys, and other functional keys of the electronic device.
For the appearance pieces such as the rear cover plate, the frame and the solid keys, at least one part of the appearance piece is directly exposed to the external environment to be used as a part of the external surface of the electronic equipment; in the case of the external appearance member such as the camera lifting bracket, at least a part of the external appearance member is exposed to the external environment only in a specific state, for example, the camera lifting bracket is in an extended state. Obviously, the properties of the surface of the appearance piece, such as hardness, wear resistance, color, luster and the like, can affect the service life, the aesthetic feeling of the appearance and the hand feeling of holding of the appearance piece to a certain extent, thereby affecting the user experience of the electronic equipment and the product competitiveness thereof. Therefore, the surface treatment described in the embodiment of the present application can be applied only to the portion of the surface of the exterior member exposed to the external environment, that is, only a portion of the substrate is subjected to the surface treatment, thereby simplifying the surface treatment process, reducing the surface treatment cost, and improving the surface treatment efficiency. Of course, all portions of the substrate may be surface treated to increase the uniformity of the surface properties of the appearance member.
In the embodiment of the application, the light-cured coating can be coated on the surface of the substrate by one or more of dip coating, roll coating, curtain coating, paint coating, spin coating and the like. Compared to conventional coatings, photocurable coatings generally include oligomers, photoinitiators, reactive diluents, and various additives. The following brief description is made of the respective components and their functions in the photocurable coating:
a photoinitiator is a substance that absorbs radiation energy and undergoes a chemical change upon excitation to produce a reactive intermediate (radical or cation) that has the ability to initiate polymerization. The photoinitiator mainly influences the photocuring speed of the photocuring coating, and the content of the photoinitiator is generally about 1-5%. According to the type of absorbed radiation, the ultraviolet photoinitiator (e.g. 250-420nm) and the visible photoinitiator (e.g. 400-700nm) can be divided; according to the type of reactive intermediate produced, there can be divided into two types, a radical type photoinitiator (e.g., cleavage type photoinitiator and hydrogen abstraction type photoinitiator) and a cationic photoinitiator.
The oligomer is a photosensitive resin with a relatively low molecular weight, and has groups capable of undergoing a photocuring reaction, such as various unsaturated double bonds or epoxy groups. The oligomer for radical photocuring paint is generally a resin having an unsaturated double bond (e.g., acryloxy group, methacryloxy group, acryl group, etc.), and the oligomer for cationic photocuring paint is generally a resin having an epoxy group or a vinyl ether group. The oligomer is the main body of the photocureable coating, the content of the oligomer is about 30-60 percent generally, and the oligomer mainly influences the physical properties of a paint film formed after the photocureable coating is hardened, such as hardness, flexibility, wear resistance, adhesive force, glossiness and the like. The oligomer with small shrinkage has good adhesive force to the matrix; the oligomer containing hydroxyl, carboxyl and other groups has good adhesion to metal; the oligomer has low surface tension, can wet and spread the base material well, and is favorable for improving the adhesive force.
The reactive diluent is an organic small molecule containing a polymerizable functional group; generally, the more functional groups, the higher the photocuring reactivity and the faster the reaction. The reactive diluent not only dissolves and dilutes the oligomer, thereby adjusting the viscosity of the photocureable coating; but also participate in the photocuring process, thereby influencing the photocuring speed of the photocuring coating and various properties of the paint film.
Although the additives are not the main components of the photo-curing coating, the content of the additives is generally about 0.2 to 1 percent; they play an important role in perfecting the various properties of photocurable coatings. For example: the defoaming agent can eliminate bubbles generated in the preparation and use processes of the photocureable coating; the leveling agent can improve the leveling property of the photocureable coating in the using process and reduce the shrinkage cavity of a coating film.
Further, before step S101, the substrate may be subjected to a pretreatment such as cleaning and drying, so that the photocurable coating adheres to the surface of the substrate.
S102: and carrying out light irradiation treatment on the photocureable coating so that the photocureable coating is cured on the surface of the substrate to form a cured layer.
In the embodiment of the present application, the photo-curable coating may be an Ultraviolet light type coating, commonly referred to as UV Paint (Ultraviolet Curing Paint). Accordingly, after the photo-curable coating material is applied to the surface of the substrate, the photo-curable coating material may be subjected to an ultraviolet irradiation treatment so that the photo-curable coating material is cured on the surface of the substrate to form a cured layer (i.e., the above-described paint film). Wherein, the wavelength range of the ultraviolet light can be 250-420nm, and the irradiation time can be based on the complete curing of the photocureable coating. In other embodiments, the light-curable coating material may be a visible light type coating material, and the visible light irradiation treatment is performed accordingly.
It should be noted that, because parameters such as material, shape, size, and the like of the substrate may have large differences, so that the components and the content of the photo-curing coating are different, the process parameters such as the wavelength range of the ultraviolet light, the irradiation duration, and the like may be adjusted accordingly, and are not limited herein.
In the related technology, the pigment is added into the photocureable coating in advance, so that the absorption effect of the photocureable coating on ultraviolet light is easily influenced; the photocureable coating of the embodiment of the application is transparent and colorless basically because the photocureable coating does not contain pigment, and the permeation and absorption effects of ultraviolet light cannot be influenced, so that the curing effect of the photocureable coating can be ensured.
S103: and heating the cured layer to expand the cured layer to form a fissure structure.
In the embodiment of the present application, the cured layer may be subjected to a heating process by baking or the like, so that the cured layer expands to form a crack structure. Wherein, the baking temperature can be in the range of 100-150 ℃, and the baking time can be about 10 min.
The crack structure formed by the thermal expansion of the cured layer can be a microstructure such as a hole, a gap, a crack and the like, and the crack structure can be only formed on the surface layer of the cured layer and can also penetrate through the cured layer; on the other hand, the two can exist independently and can also be communicated with each other. Further, the fissured structure is at least partially in communication with the environment, i.e. the interior of the solidified layer is able to communicate with the environment via the fissured structure, and may have an average size of 0.5-5 μm, so as to facilitate subsequent containment of the filler.
It should be noted that, since there may be a large difference in the parameters such as the film thickness, the expansibility, and the required average crack size of the cured layer, the process method of the heat treatment and the parameters thereof may be adjusted accordingly, and are not limited herein.
S104: and coating a filler on the surface of the cured layer, wherein the filler is filled in the cracks of the cured layer.
In the embodiment of the application, the filler can be coated on the surface of the cured layer by one or more of dip coating, roll coating, curtain coating, paint coating, spin coating and the like. Wherein the average particle size of the filler may be 0.05 to 0.5 μm so that the filler can be filled in the cracks of the cured layer. In other words, in order to enable the fissures of the cured layer to effectively contain the filler, the average particle size of the filler is greater than or equal to the average size of the fissures of the cured layer. In other embodiments, the average size of the fissures of the cured layer and the average particle size of the filler can be other values, which can be reasonably adjusted according to the process requirement of filling the fissures of the cured layer with the filler, and is not limited herein.
Further, the filler of the embodiments of the present application may be a pigment or a powder particle. In some embodiments, the filler may be one or more of titanium pigments, iron pigments, chromium pigments, lead pigments, zinc pigments, metal pigments, organic synthetic pigments, and the like, so that the originally transparent colorless cured layer can present different colors, thereby satisfying the use requirement of the appearance piece for colors. For example: titanium oxide pigments correspond to white, iron oxide fillers correspond to red, selenium disulfide pigments correspond to gold, and "zinc sulfide + barium sulfate" pigments (commonly known as lithopone) correspond to white. In other embodiments, the filler may also be one or more of powder particles such as silver powder, aluminum powder, pearl powder, etc., so that the cured layer has a metallic texture. In other embodiments, the two methods can be combined to satisfy the requirements of color and metal texture of the appearance piece. Of course, in still other embodiments, the mechanical properties of the cured layer, such as hardness, abrasion resistance, etc., may also be improved by the filler.
Based on the above detailed description, both the average size of the fissures of the cured layer and the average particle size of the filler are of the order of microns; the size of the fissures and/or fillers of the partially cured layer is even of the order of nanometers. After the filler is coated on the surface of the cured layer, in the process of filling the filler in the cracks of the cured layer, on one hand, the filler may be coagulated and agglomerated due to the small size, so that the actual particle size of the filler is increased to a certain extent, and the fluidity of the filler is reduced; on the other hand, the cracks of the cured layer may be subject to capillary phenomenon due to the small size, which may increase the surface tension between the filler and the cracks of the cured layer to some extent, thereby easily causing the filler to be filled in the cracks of the cured layer to be deteriorated, or even not be filled. In contrast, in the process of filling the filler in the cracks of the cured layer, the embodiment of the application may perform vibration treatment, such as mechanical vibration, electromagnetic vibration, etc., on the cured layer, or perform heating treatment, such as baking, etc., on the cured layer, so as to eliminate the coagulation, agglomeration, etc., of the filler, and reduce the surface tension between the filler and the cracks of the cured layer, thereby improving the effect of filling the filler in the cracks of the cured layer, and further increasing the surface treatment effect of the appearance piece.
It should be noted that after step S104, that is, after the filling effect of the filler on the cured layer meets the requirement of the substrate for treating the surface thereof, a corresponding cleaning operation may be performed to remove the excess filler on the surface of the cured layer.
In summary, in the related art, the filler is added to the photocurable coating in advance, and in the process of performing illumination treatment on the photocurable coating, the filler easily causes the phenomena of reflection, refraction, scattering and the like of light, so that the absorption effect of the photocurable coating on light energy is influenced, and the curing characteristic of the photocurable coating is further influenced. The embodiment of the application develops a new way to separate the curing process of the photocureable coating from the adding process of the filler, namely, the photocureable coating is added after being cured, so that the curing process of the photocureable coating is not influenced by the filler, the curing effect of the photocureable coating can be ensured, the selectivity of the filler in the aspects of types, concentration, particle sizes and the like can be increased, and the surface treatment effect of an appearance part and the application range of the photocureable coating are further increased.
Referring to fig. 2, fig. 2 is a schematic flowchart illustrating a surface treatment method for an appearance piece of an electronic device according to another embodiment of the present disclosure. The method comprises the following steps:
s201: and coating a primer coating on the surface of the substrate.
In the embodiment of the application, the primer coating can be coated on the surface of the substrate by one or more of dip coating, roll coating, curtain coating, paint coating, spin coating and the like. Wherein, the primer coating can use polyurethane series treating agent, and the main component is polyacrylic resin.
S202: and heating the primer coating to cure the primer coating on the surface of the substrate to form a primer layer.
In the embodiment of the present application, the primer coating may be subjected to a heating treatment by baking or the like, so that the primer coating is cured on the surface of the substrate to form the primer layer.
It should be noted that, since parameters such as the kind and the film thickness of the primer layer may have large differences, the process method and the parameters of the heat treatment may be adjusted accordingly, and are not limited herein.
S203: and coating a light-cured coating on the surface of the primer layer.
S204: and carrying out light irradiation treatment on the photocuring coating so that the photocuring coating is cured on the surface of the primer layer to form a cured layer.
S205: and heating the cured layer to expand the cured layer to form a fissure structure.
S206: and coating a filler on the surface of the cured layer, wherein the filler is filled in the cracks of the cured layer.
In the process of filling the filler in the cracks of the cured layer, the cured layer may be subjected to vibration treatment, such as mechanical vibration and electromagnetic vibration, or may be subjected to heating treatment, such as baking, to improve the effect of filling the filler in the cracks of the cured layer, thereby increasing the surface treatment effect of the appearance piece.
Compared with the surface treatment method described in the above embodiments, in this embodiment, a primer layer is formed on the surface of the substrate in advance, so that the primer layer formed by coating the light-curable coating on the surface of the substrate is not directly coated on the substrate, but is mainly used to increase the adhesion between the light-curable coating and the substrate through the primer layer, thereby increasing the bonding strength of the cured layer adhered to the substrate, and further increasing the reliability of the appearance.
Referring to fig. 3, fig. 3 is a schematic flowchart illustrating a surface treatment method for an appearance piece of an electronic device according to another embodiment of the present disclosure. The method comprises the following steps:
s301: and coating the surface of the substrate with a photocuring coating.
Before step S301, a primer layer may be formed on the surface of the substrate in advance, so that the light-curable coating is applied to the primer layer on the surface of the substrate, thereby increasing the bonding strength of the cured layer to the substrate.
S302: and carrying out light irradiation treatment on the photocureable coating so that the photocureable coating is cured on the surface of the substrate to form a cured layer.
S303: and heating the cured layer to expand the cured layer to form a fissure structure.
S304: and coating a filler on the surface of the cured layer, wherein the filler is filled in the cracks of the cured layer.
In the process of filling the filler in the cracks of the cured layer, the cured layer may be subjected to vibration treatment, such as mechanical vibration and electromagnetic vibration, or may be subjected to heating treatment, such as baking, to improve the effect of filling the filler in the cracks of the cured layer, thereby increasing the surface treatment effect of the appearance piece.
S305: and cooling the cured layer to shrink the cracks of the cured layer so as to seal the filler in the cured layer.
In the embodiment of the application, the cured layer may be cooled by air cooling, or the like, and the main purpose is to shrink the cured layer to cause the cracks of the cured layer to shrink, that is, the average size of the cracks of the cured layer is reduced, so as to seal the filler in the cured layer, thereby increasing the stability of the cured layer and further increasing the reliability of the appearance piece. Wherein the shrinkage of the cured layer may be 10% to 15%.
Since there may be a large difference in parameters such as the coating composition, the film thickness and the surface area of the cured layer, the type of filler, the particle size and the degree of filling, the process of the cooling treatment and the parameters thereof may be adjusted accordingly, and are not limited herein.
Based on the above detailed description, since the filler may be in a high temperature state (e.g., 120 ℃) all the time before and during filling in the fissures of the cured layer, it is liable that the cured layer has thermal stress. Therefore, the embodiment of the application can cool the solidified layer and eliminate the thermal stress generated in the surface treatment process to a certain extent, so that the solidified layer is prevented from cracking or being separated from the substrate, and the stability and reliability of the solidified layer are improved.
Compared with the surface treatment method described in any of the above embodiments, in this embodiment, after the filler is filled in the cracks of the cured layer, the cured layer is cooled, so that the cracks of the cured layer contract to store the filler in the cured layer, which not only can prevent the filler from separating from the cured layer, thereby increasing the stability of the cured layer, but also can increase the density of the cured layer, thereby reducing the contraction tendency of the cured layer, and can also eliminate the thermal stress generated during the surface treatment process, thereby preventing the cured layer (from the substrate) from cracking, and further increasing the reliability of the appearance piece.
Referring to fig. 4, fig. 4 is a schematic flowchart illustrating a surface treatment method for an appearance piece of an electronic device according to still another embodiment of the present disclosure. The method comprises the following steps:
s401: and coating the surface of the substrate with a photocuring coating.
Before step S401, a primer layer may be formed on the surface of the substrate in advance, so that the light-curable coating is applied to the primer layer on the surface of the substrate, thereby increasing the bonding strength of the cured layer to the substrate.
S402: and carrying out light irradiation treatment on the photocureable coating so that the photocureable coating is cured on the surface of the substrate to form a cured layer.
S403: and heating the cured layer to expand the cured layer to form a fissure structure.
S404: and coating a filler on the surface of the cured layer, wherein the filler is filled in the cracks of the cured layer.
In the process of filling the filler in the cracks of the cured layer, the cured layer may be subjected to vibration treatment, such as mechanical vibration and electromagnetic vibration, or may be subjected to heating treatment, such as baking, to improve the effect of filling the filler in the cracks of the cured layer, thereby increasing the surface treatment effect of the appearance piece.
S405: and cooling the cured layer to shrink the cracks of the cured layer so as to seal the filler in the cured layer.
S406: and forming a protective layer on the surface of the solidified layer.
In the embodiment of the application, the protective layer is mainly used for separating the filler filled in the cured layer from the external environment so as to increase the effect of the filler filled in the cracks of the cured layer, thereby increasing the surface treatment effect of the appearance piece. Meanwhile, the solidified layer can undergo two completely opposite processes of heating and cooling, which can cause the quality problems of larger surface roughness, lower surface smoothness and the like; and the filler floating on and/or embedded in the cured layer deteriorates the surface roughness of the cured layer, so that the protective layer may also function to reduce the surface roughness of the exterior member to some extent and to improve the surface finish of the exterior member.
In some embodiments, a photocurable coating may be applied to the surface of the cured layer; and carrying out light irradiation treatment on the photocureable coating so that the photocureable coating is cured on the surface of the cured layer to form a protective layer. In other embodiments, a polyurethane coating may also be applied to the surface of the cured layer; and heating the polyurethane coating to cure the polyurethane coating on the surface of the cured layer to form the protective layer. For specific settings of the light irradiation treatment and the heating treatment, reference may be made to the description of any of the above embodiments, and details are not repeated here.
Compared with the surface treatment method described in any of the above embodiments, in this embodiment, the protective layer is further formed on the surface of the cured layer, which not only separates the filler filled in the cured layer from the external environment, but also improves the surface quality of the exterior piece, thereby increasing the surface treatment effect of the exterior piece.
Referring to fig. 5, fig. 5 is a schematic cross-sectional structure diagram of an embodiment of an appearance piece for an electronic device provided in the present application.
The appearance member 50 of the embodiment of the present application may be at least one of a rear cover plate, a frame, a camera lifting bracket, and a solid key for an electronic device. In the embodiment of the present application, the appearance member 50 is a rear cover plate, and the surface treatment method according to any of the above embodiments may be performed only on a surface of the rear cover plate exposed to the external environment (that is, a surface of the rear cover plate contacting with a user), so as to simplify the surface treatment process, reduce the surface treatment cost, and improve the surface treatment efficiency. For a specific surface treatment method, reference may be made to the related description of any of the above embodiments, which is not repeated herein.
Further, the appearance piece 50 includes a base 51 and a cured layer 52 attached to the base 51. Wherein the cured layer 52 is filled with a filler 53.
On the one hand, the filler 53 may be filled only in the surface layer of the cured layer 52 far from the substrate 51, or may be filled into the deep layer of the cured layer 52 up to the substrate 51; on the other hand, the cured layer 52 may be filled in isolation, or may be filled in contact with each other in the cured layer 52. Therefore, the filling of the filler 53 in the cured layer 52 shown in fig. 5 is only schematically described, and is not intended to limit the actual structure of the cured layer 52 and the filler 53 and the actual filling of the filler 53 in the cured layer 52 in the embodiment of the present application.
Based on the above detailed description, the cured layer 52 and the filler 53 therein are mainly used to make the surface properties of the appearance piece 50, such as color, luster, hardness and wear resistance, meet the usage requirements, thereby increasing the service life, aesthetic appearance and hand-holding feeling of the appearance piece 50.
Referring to fig. 6, fig. 6 is a schematic cross-sectional structure diagram of an embodiment of an electronic device provided in the present application.
The electronic device 60 of the embodiment of the present application may be a portable device such as a mobile phone, a tablet computer, a notebook computer, and a wearable device. The embodiment of the present application takes the electronic device 60 as a mobile phone as an example for description. The electronic device 60 includes a display module 61 and an appearance piece 50, and the appearance piece 50 is assembled with the display module 61.
Based on the above detailed description, the user experience and the product competitiveness of the electronic device 60 can be enhanced while the performance of the appearance piece 50, such as the service life, the aesthetic appearance, and the hand feeling of holding, is enhanced.
The above description is only a part of the embodiments of the present application, and not intended to limit the scope of the present application, and all equivalent devices or equivalent processes performed by the content of the present application and the attached drawings, or directly or indirectly applied to other related technical fields, are also included in the scope of the present application.
Claims (11)
1. A surface treatment method for an exterior member of an electronic device, the method comprising:
coating a photo-curing coating on the surface of the substrate;
carrying out light irradiation treatment on the light-cured coating so that the light-cured coating is cured on the surface of the substrate to form a cured layer;
heating the cured layer to expand the cured layer to form a fractured structure; wherein the average size of the fissures of the cured layer is on the order of micrometers, or the average size of the fissures of the cured layer is on the order of micrometers and nanometers;
and coating a filler on the surface of the cured layer, wherein the filler is filled in the cracks of the cured layer.
2. The method of claim 1, wherein the step of applying the photo-curable coating to the surface of the substrate is preceded by the step of:
coating a primer coating on the surface of the substrate;
and carrying out heat treatment on the primer coating so that the primer coating is cured on the surface of the substrate to form a primer layer.
3. The method according to claim 1, wherein the step of coating the surface of the cured layer with a filler, the filler filling the cracks of the cured layer, comprises:
and carrying out vibration treatment on the cured layer.
4. The method according to claim 3, wherein the step of coating the surface of the cured layer with a filler, the filler filling the cracks of the cured layer, is followed by:
and cooling the cured layer to shrink the cracks of the cured layer so as to seal the filler in the cured layer.
5. The method according to any one of claims 3 or 4, wherein the step of coating the surface of the cured layer with a filler, the filler filling the cracks of the cured layer, further comprises:
and forming a protective layer on the surface of the solidified layer.
6. The method according to claim 5, wherein the step of forming a protective layer on the surface of the cured layer comprises:
coating a light-cured coating on the surface of the cured layer;
and carrying out light irradiation treatment on the light-cured coating so that the light-cured coating is cured on the surface of the cured layer to form a protective layer.
7. The method according to claim 5, wherein the step of forming a protective layer on the surface of the cured layer comprises:
coating a polyurethane coating on the surface of the cured layer;
and carrying out heating treatment on the polyurethane coating so that the polyurethane coating is cured on the surface of the cured layer to form a protective layer.
8. The method of claim 1, wherein the filler is a pigment or powder particles.
9. An appearance piece for an electronic device, which is characterized by comprising a base body and a cured layer attached to the base body, wherein the cracks of the cured layer are filled with fillers; wherein the average size of the fissures of the cured layer is on the order of micrometers, or the average size of the fissures of the cured layer is on the order of micrometers and nanometers.
10. The appearance of claim 9, wherein the appearance is at least one of a back cover, a bezel, a camera lifting bracket, and a physical button.
11. An electronic device, comprising a display module and the appearance member of claim 9 or 10, wherein the appearance member is assembled with the display module.
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| CN107689264A (en) * | 2017-08-11 | 2018-02-13 | 宁波大学 | Transparent conductive film and preparation method, the preparation method of PDLC component |
| CN109093929A (en) * | 2018-09-17 | 2018-12-28 | 华为技术有限公司 | A kind of terminal |
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| CN102211082A (en) * | 2010-04-09 | 2011-10-12 | 北京华旗资讯数码科技有限公司 | Method for manufacturing crackle ornamentations on articles and digital camera with ornamentations |
| CN102211081A (en) * | 2010-04-09 | 2011-10-12 | 北京华旗资讯数码科技有限公司 | Method for manufacturing grains and patterns on product and digital camera with grains and patterns |
| CN202862708U (en) * | 2012-09-12 | 2013-04-10 | 海尔集团公司 | Household electrical appliance product with crack mechanism |
| CN103625033A (en) * | 2013-11-25 | 2014-03-12 | 常熟华冶薄板有限公司 | Ultraviolet-curable crackle paint color-precoated steel plate and preparation method thereof |
| CN108454307A (en) * | 2017-02-20 | 2018-08-28 | 胡厚飞 | Crack surfaces decoration and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107689264A (en) * | 2017-08-11 | 2018-02-13 | 宁波大学 | Transparent conductive film and preparation method, the preparation method of PDLC component |
| CN109093929A (en) * | 2018-09-17 | 2018-12-28 | 华为技术有限公司 | A kind of terminal |
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