CN111263545A - Decorative membrane, preparation method, shell assembly and electronic equipment - Google Patents
Decorative membrane, preparation method, shell assembly and electronic equipment Download PDFInfo
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- CN111263545A CN111263545A CN202010060380.3A CN202010060380A CN111263545A CN 111263545 A CN111263545 A CN 111263545A CN 202010060380 A CN202010060380 A CN 202010060380A CN 111263545 A CN111263545 A CN 111263545A
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/0279—Improving the user comfort or ergonomics
- H04M1/0283—Improving the user comfort or ergonomics for providing a decorative aspect, e.g. customization of casings, exchangeable faceplate
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Abstract
The application provides a decorative membrane, a preparation method of the decorative membrane, a shell assembly and electronic equipment. This decoration diaphragm includes: the color filter comprises a first substrate, a second substrate and a third substrate, wherein one side of the first substrate is provided with a dyeing layer, and the colors of different positions of the dyeing layer are not completely the same; the first adhesive layer is positioned on one side, away from the first base material, of the dyeing layer; the second substrate has metal luster, and is attached to the first substrate through the first glue layer; the decorative layer is positioned on one side, far away from the first adhesive layer, of the second substrate. The decorative film adopts two substrates to realize the appearance effect of the decorative film together, so that the decorative film has better metallic luster and gradient color appearance, and has simple preparation process and low cost.
Description
Technical Field
The application relates to the technical field of electronics, in particular to a decorative membrane, a preparation method of the decorative membrane, a shell assembly and electronic equipment.
Background
Along with the popularization of electronic products such as smart phones, more and more electronic devices such as mobile phones adopt shells made of glass materials. Especially, the glass rear cover with gradient color is adopted by more and more electronic devices due to good texture and beautiful appearance. The current solutions for realizing the gradient color on the glass, especially the glass with a curved surface (such as a 2.5D or 3D shell) mainly include the solution of obtaining a metallic gradient color effect by using a plating film and the solution of attaching a decorative film. However, both the coating and the decoration film have disadvantages of low production efficiency and poor product yield.
Therefore, the current decorative film and the preparation method thereof, the housing assembly and the electronic device still need to be improved.
Disclosure of Invention
The present application is directed to solving, at least to some extent, one of the technical problems in the related art.
In one aspect of the present application, a decorative film is presented. This decoration diaphragm includes: the color filter comprises a first substrate, a second substrate and a third substrate, wherein one side of the first substrate is provided with a dyeing layer, and the colors of different positions of the dyeing layer are not completely the same; the first adhesive layer is positioned on one side, away from the first base material, of the dyeing layer; the second substrate has metal luster, and is attached to the first substrate through the first glue layer; the decorative layer is positioned on one side, far away from the first adhesive layer, of the second substrate. The decorative film adopts two substrates to realize the appearance effect of the decorative film together, so that the decorative film has better metallic luster and gradient color appearance, and has simple preparation process and low cost.
In another aspect of the present application, the present application provides a method of making a decorative film as described above, the method comprising: providing a first substrate, and forming a dyeing layer on one side of the first substrate; providing a second substrate, and forming a decorative layer on one side of the second substrate; and adhering and fixing the first base material and the second base material by using a first adhesive layer, and enabling the dyeing layer to face the surface of one side of the second base material, which is not provided with the decorative layer. The method can simply and conveniently obtain the decorative film, is simple to operate, and has lower process requirements, higher production yield and lower production cost because the appearance effect of the decorative film is realized by adopting two substrates together.
In another aspect of the present application, a housing assembly is presented. The housing assembly includes a housing base formed of a transparent material; the decorative membrane described above, wherein the decorative membrane is located on the surface of one side of the housing base, and one side of the first base material in the decorative membrane is disposed toward the housing base. Thus, the housing assembly has at least one of the following advantages: the paint has low cost, good appearance effect, good metallic luster and gradient color effect.
In yet another aspect of the present application, an electronic device is presented. The electronic device includes: the housing assembly described above; display screen and mainboard, the display screen with the mainboard links to each other, just the display screen with the mainboard all accomodate in casing subassembly's accommodation space. Therefore, the electronic equipment has at least one of the advantages of low cost, good shell appearance effect and the like.
Drawings
FIG. 1 shows a schematic structural view of a decorative film sheet according to an example of the present application;
FIG. 2 shows a schematic structural view of a decorative film sheet according to another example of the present application;
FIG. 3 shows a schematic flow diagram of a method of making a decorative film sheet according to one example of the present application;
FIG. 4 shows a schematic partial flow diagram of a method of making a decorative film sheet according to yet another example of the present application;
FIG. 5 shows a schematic structural view of a housing assembly according to an example of the present application;
fig. 6 shows a schematic structural diagram of an electronic device according to an example of the application.
Description of reference numerals:
1000: decorating the membrane; 100: a first substrate; 200: a dyeing layer; 300: a first glue layer; 400: a second substrate; 500: a decorative layer; 510: a texture sub-layer; 520: an optical coating sublayer; 530: a bottom-covering ink sublayer; 600: a second adhesive layer; 2000: a housing base; 3000: a housing assembly; 4000: an electronic device; 5000: a display screen.
Detailed Description
Embodiments of the present application are described in detail below. The following description of the embodiments is merely exemplary in nature and is in no way intended to limit the present disclosure. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications.
In one aspect of the present application, the present application provides such a decorative film. Referring to fig. 1, the decorative film sheet includes: the first substrate 100 has a dyed layer 200 on one side of the first substrate 100, and the colors of different positions of the dyed layer are not completely the same. The second substrate 400 is a substrate with metallic luster, and is attached to the first substrate 100 through the first glue layer 300 and fixed to one side of the dyed layer 200. The side of the second substrate 400 away from the first adhesive layer 300 has a decoration layer 500, which can enrich the appearance of the decoration film. The decorative film adopts two substrates to realize the appearance effect of the decorative film together, so that the decorative film has better metallic luster and gradient color appearance, and has simple preparation process and low cost.
For ease of understanding, the following first briefly explains the principle by which the decorative film according to the present application can achieve the above-mentioned advantageous effects:
as mentioned above, in the related art, the appearance color and texture of the glass or plastic plate casing are mostly realized by coating or attaching a decorative film. However, the technology of directly coating a film on glass, especially on 3D glass, is often difficult to achieve the effect of gradient color, and the efficiency and yield of coating the film are low because the glass substrate has a curved surface. And because the UV texture layer is difficult to form on the surface of the curved glass, the texture of the product is poor. While the decorative film in the related art mostly adopts a single film substrate, for example, the preparation of an appearance effect layer is realized on a PET substrate, but the decorative film is difficult to realize good fading and good metallic luster effects at the same time: if the gradient effect is prepared by adopting the coating technology, the requirement on the technology is high, the defects of high precision requirement of processing equipment, high cost, difficult control of coating color and the like exist, the production yield cannot be ensured, the thickness of a coating layer cannot be too large, and the defects of cracking, falling and the like easily occur when the thickness of a film layer prepared by the coating technology is more than 400nm, so that the metal luster strength is not enough. If the gradient color is realized by spraying, transferring and filling UV (ultraviolet) layer printing ink and other modes, the metal luster strength of the product is insufficient, the brightness of the attached 3D glass is insufficient, and the texture of the finally formed shell is poor. The decoration membrane provided by the application adopts a mode that the first base material and the second base material are compounded, a dyeing layer with gradient color can be realized on the surface of the first base material through modes including but not limited to dyeing and the like, and a decoration layer is formed on the surface of the second base material, so that the overall metal texture and the texture of the decoration membrane are improved. Particularly, when the second substrate has metal luster, the production cost for preparing the decorative layer can be greatly reduced, and only a simple brightening sub-layer is formed in the decorative layer, so that the decorative film can have enough metal luster and texture as a whole.
The following provides a detailed analysis of the structure of the appearance membrane, following the specific examples of the present application.
According to some examples of the present application, the first substrate 100 is transparent, and the material forming the first substrate includes PET. The first substrate made of the material has good transparency and flexibility, so that the colors of the dyeing layer and the decorative layer on the second substrate can be observed through the first substrate, and the appearance film can have certain flexibility so as to be better attached to a surface with a certain curved surface, such as a 3D glass surface.
The dyed layer 200 may be formed by methods including, but not limited to, dyeing, spraying, etc., and the color or depth of the dye at different positions on the surface of the dyed layer 200 is not completely the same, i.e., the dyed layer 200 may have one or more colors, and the depth of the color may have a variation from dark to light. For example, the dyed layer 200 may have two colors, and the decorative film may be divided into an upper half and a lower half along the length direction of the first substrate 100, the first color may be distributed on the upper half of the first substrate 100, and the depth of the first color may gradually increase and may be increased to the second color along the direction extending from the upper half to the lower half. The second color may be distributed on the lower half of the first substrate 100, and the depth of the second color may be gradually deepened in a direction extending from the upper half to the lower half. It can be understood by those skilled in the art that the above-described specific distribution of the first color and the second color is only one embodiment according to the present application and cannot be construed as a limitation of the color dye layer 200.
According to an example of the present application, the second substrate 400 may be a substrate having a metallic luster but formed of a non-metallic material. For example, in particular, the second substrate 400 may have a plurality of polymeric nano-sublayers stacked in sequence, with a metallic luster being achieved by stacking a plurality of polymeric sublayers of lower thickness (for example in the micrometer or even nanometer range). The second substrate 400 may have a certain transparency so that the appearance of the decorative layer can be observed through the second substrate. The second substrate 400 may also be a substrate having a certain color of metallic luster, thereby further enriching the appearance effect of the appearance film.
According to an example of the present application, referring to fig. 2, decorative layer 500 includes: at least one of the texture sub-layer 510 and the optical coating sub-layer 520, and an underlying ink sub-layer 530. The material forming the texture sub-layer includes uv transfer glue, so that the texture sub-layer 510 may provide a certain stereoscopic texture appearance effect to the decorative film sheet. As described above, since the second substrate 400 has a certain metallic luster, the metallic luster of the decorative film may not be achieved by the optical coating sublayer 520, and the optical coating sublayer 520 may only achieve the brightness enhancement effect. Therefore, the operation of the coating process can be simplified, and the process difficulty and the production cost can be reduced. For example, according to some embodiments of the present application, the optical coating sublayer 520 may include a plurality of oxide sublayers stacked in sequence, for example, may include a plurality of SiO sublayers2And TiO2The optical coating sublayer (2) has a total thickness of 50 to 200nm, and can be formed by any one of evaporation, continuous line sputtering or furnace sputtering, but the entire thickness of the coating is thin, and thus defects such as cracking and peeling are not likely to occur. Alternatively, the optical coating sub-layer may also comprise a vacuum non-conductive electroplated layer, i.e. the optical coating sub-layer may be formed by a vacuum non-conductive electroplating process, in which case the total thickness of the optical coating sub-layer may be 1-5 microns. For example, the optical coating sub-layer 520 may be formed by forming a metal layer including, but not limited to, Ag, Cu, and Al, particularly by vacuum non-conductive plating (NCVM). Metal layer and pattern formed by vacuum non-conductive electroplating processThe contact of the sub-layers is firmer, so the film layer is not easy to peel off or fall off even if the thickness is slightly larger.
According to the present disclosure, the substrate and the laminated structure (e.g., the dyed layer, the optical coating sub-layer, etc.) are transparent or have a certain transmittance, and an under-coating ink sub-layer 530 may be further provided on a side of the optical coating sub-layer 520 away from the second substrate in order to make the decorative layer opaque, have a certain hiding power, and improve the appearance of the laminated structure. The specific material, composition and thickness of the under-coating ink sub-layer 530 are not particularly limited as long as the decorative film is opaque, i.e., has a certain covering power. For example, the underlying ink sub-layer 530 may include multiple screen printed layers, such as multiple white layers, or have multiple black layers, or multiple white and black layers.
According to the example of the application, the first adhesive layer 300 fixes the first substrate and the second substrate together, and the first adhesive layer 300 can be located on the side of the dyed layer 200 away from the first substrate, so that the dyed layer is sandwiched between the first adhesive layer and the first substrate in the use process of the decorative film, and the dyed layer can be well protected from abrasion, fading and the like. According to an example of the present application, the thickness of the first adhesive layer 300 may be 7-9 micrometers, and the material forming the first adhesive layer includes an ultraviolet light-curable adhesive. Therefore, the first substrate and the second substrate can be fixed simply through the ultraviolet curing process, and the side of the second substrate where the decoration layer 500 is not disposed can be in contact with the first adhesive layer 300.
According to an example of the present application, the decorative film may further include a second adhesive layer, and the second adhesive layer may be located on a side of the first substrate away from the first adhesive layer. The second adhesive layer 600 may include, but is not limited to, an optical adhesive layer, and the decorative film may be attached to the housing base by the second adhesive layer. As can be understood by those skilled in the art, in order to ensure that the second adhesive layer 600 has adhesiveness, a release film may be disposed on a side of the second adhesive layer 600 away from the first substrate 100, and the release film is removed when the decorative film is attached to the housing base.
In another aspect of the present application, a method of making a decorative film is presented. The decorative film may be the decorative film described above. The method can simply and conveniently obtain the decorative film, is simple to operate, and has lower process requirements, higher production yield and lower production cost because the appearance effect of the decorative film is realized by adopting two substrates together. Specifically, referring to fig. 3, the method may include:
s100: providing a first substrate, and forming a dyed layer on one side of the first substrate
According to an example of the present application, a first substrate is provided in this step, and a dyed layer is formed on one side of the first substrate. The materials of the first substrate, the substrate colors of the dyed layer, and the like have been described in detail above, and are not described in detail herein.
The dyed layer may be formed by dyeing the first substrate with a dye, including but not limited to, for example, according to some examples of the present application, forming the dyed layer may specifically include:
at least one part of the first substrate is immersed in a solution containing the dye and is extracted after being immersed, the speed of immersing the first substrate in the solution and/or the speed of extracting the first substrate from the solution are controlled, and the time for which different positions of the first substrate are contacted with the solution is different, so that dyed layers with different colors at different positions are formed. Before the dyeing layer is formed, a second adhesive layer for attaching the decorative film to the shell base body can be formed on one side of the first base material in advance. For example, a single-sided optical glue may be formed on one side of the first substrate to form the second glue layer by means including, but not limited to, single-sided coating. And then, attaching a release film to one side of the second adhesive layer, which is far away from the first substrate, and then placing the first substrate attached with the release film on a tool clamp to enter a dip-dyeing pool with dye solution. Specifically, the dye solution in the dip dyeing tank can be a chemical dip dyeing solution, can be neutral or acidic, and can be any one of multiple colors such as orange, blue, black, purple and the like. The vertical immersion can be carried out, the dip dyeing temperature can be 80-85 ℃, and the dip dyeing time can be 30-120 s. That is, the solution in the dip tank may have a temperature of 80 to 85 degrees celsius when the first substrate is immersed therein, and after all portions of the first substrate that need to be immersed in the solution are in contact with the solution, the solution may be left in the dip tank for the above-mentioned time, for example, may be withdrawn after being left for 1 minute. According to some examples of the present application, the 2/3 region of the first substrate may be impregnated, for example, by dipping the substrate vertically into a dye solution along the length or width direction and stopping the substrate feed into the dye solution when 2/3 of the length or width portion is immersed in the solution and contacts the dye. The time for soaking different parts of the first substrate in the dye is different by controlling the speed of soaking or extracting the first substrate in the solution, and the longer the first substrate is soaked in the dye solution, the more dye is soaked in the dye solution, the darker the color is, and the gradient color is formed.
S200: providing a second substrate, and forming a decorative layer on one side of the second substrate
According to an embodiment of the application, a second substrate is provided in this step, and a decorative layer is formed on one side of the second substrate. The specific materials and structures of the second substrate and the decorative layer have been described in detail above, and are not described in detail here. It will be understood by those skilled in the art that the order of providing the first substrate and the second substrate is not particularly limited, the first substrate may be provided first and the dyed layer formed on one side of the first substrate, the second substrate may be provided first and the decorative layer formed, or the order of the above-mentioned steps of S100 and S200 may be interchanged.
According to some specific examples of the present application, referring to fig. 4, forming a decorative layer on one side of the second substrate may specifically include the steps of:
s210: forming ultraviolet transfer printing glue on one side of the second substrate in a transfer printing mode, and forming a texture sub-layer through ultraviolet light curing
According to an example of the present application, forming the decorative layer may first comprise the step of forming a texture sub-layer. Specifically, the ultraviolet transfer glue with certain texture can be formed by transferring on one side of the second substrate, and the texture sub-layer is formed by curing. The ultraviolet transfer printing glue can comprise polyurethane acrylate, the thickness of the ultraviolet transfer printing glue transferred in the step can be 7-9 micrometers, and the ultraviolet irradiation energy for ultraviolet curing can be 1000-1200 MJ. Thus, a texture sublayer of moderate thickness can be formed.
S220: forming an optical coating sub-layer on the side of the texture sub-layer far away from the second substrate
According to an example of the present application, an optical coating sublayer may be formed in this step. Therefore, the second substrate can be brightened, and a better metal appearance effect is provided for the appearance membrane. According to the present application, the optical coating sub-layer can be formed by using evaporation or sputtering technology, and particularly can be formed by using any one of evaporation, continuous line sputtering or furnace sputtering. For example, a plurality of sequentially stacked oxide sublayers, such as sequentially stacked SiO, may be formed2Sublayer and TiO2And (3) sub-layers. The total thickness of the optical coating sub-layer may be 50-200 nm. As mentioned above, since the second substrate has a certain metallic luster, the optical coating sub-layer can be formed to achieve the brightening effect without relying on the optical coating sub-layer to achieve the metallic luster. Therefore, on one hand, the optical coating sub-layer formed by evaporation or sputtering can be thinner, so that the defects of cracks, peeling and the like caused by over-thickness of the optical coating layer can be relieved, and on the other hand, if the optical coating sub-layer is only used for brightening, the color control of the optical coating sub-layer can be reduced, the control of the sputtering precision of each sub-layer of the optical coating sub-layer can be reduced, and the product yield is improved.
Alternatively, the optical coating sub-layer may be formed using a vacuum non-conductive electroplating technique. Specifically, a metal layer can be formed by using a vacuum non-conductive electroplating technology to form an optical coating sublayer, so that the effect of brightening is realized. The electroplated metal may include at least one of Ag, Cu, and Al. The total thickness of the optical coating sub-layer can be 1-5 microns at this time, because the vacuum non-conductive plating technique forms a firm contact between the film layer and the texture sub-layer.
S230: forming a bottom covering ink sub-layer on one side of the optical coating sub-layer far away from the texture sub-layer through silk-screen printing ink
According to the embodiment of the application, the under-coating ink sub-layer is formed in the step, so that the whole decorative membrane is opaque, the structures such as a shell assembly and the like utilizing the decorative membrane can be made opaque, certain covering power can be provided, and the structures such as a battery, a main board and the like contained in the shell assembly can be made invisible to a user.
According to an example of the present application, forming the under-ink sub-layer may be by screen printing the under-ink. The method specifically comprises the following steps: and performing first silk-screen printing on the side of the optical coating sub-layer far away from the texture sub-layer to form a first white printing layer, and performing first baking at 80 ℃ for 30 min. And then, carrying out second silk-screen printing on one side of the first whitening layer, which is far away from the optical coating sub-layer, so as to form a second whitening layer, and carrying out second baking at the temperature of 80 ℃ for 30 min. And finally, carrying out third silk-screen printing on one side of the second white printing layer, which is far away from the first white printing layer, so as to form a first black printing layer, and carrying out third baking for 60min at the temperature of 80 ℃ so as to form a bottom covering ink sub-layer. The specific thicknesses of the first white layer, the second white layer and the first black layer are not particularly limited and may be selected by those skilled in the art according to practical circumstances. For example, the three white and black layers may each independently be 8-12 microns.
S300: the first base material and the second base material are stuck and fixed by utilizing a first glue layer
According to an example of the application, a first substrate with a dyeing layer and a second substrate with a decoration layer are fixedly pasted by a first glue layer in the step. Specifically, the first glue layer may be formed on the surface of the second substrate side in advance before the decorative layer is formed on the surface of the second substrate. For example, the optical glue may be first applied to one side of the surface of the second substrate, and then the decorative layer may be formed on the other side of the second substrate, for example, by performing the step of forming the texture sub-layer. Therefore, the surface area of the other side of the second substrate with the decorative layer is provided with the first glue layer which can be used for adhering the first substrate and the second substrate. When the adhesive tape is pasted, one side of the first base material with the dyeing layer can be contacted with the first adhesive layer. The structure of the resulting decorative film can be as shown in fig. 1 and 2.
In another aspect of the present application, a housing assembly is presented. Referring to fig. 5, the housing assembly 3000 includes a housing base 2000 formed of a transparent material, and the decorative film 1000 described above. The decorative film 1000 is disposed on the surface of the housing base 2000 side, and the first substrate side of the decorative film 1000 is disposed toward the housing base, for example, the decorative film 1000 and the housing base 2000 can be bonded by the aforementioned second adhesive layer. Thus, the housing assembly has at least one of the following advantages: the paint has low cost, good appearance effect, good metallic luster and gradient color effect.
It should be noted that, in the present application, the specific shape and material of the housing base body are not particularly limited as long as the housing base body is formed of a transparent material. For example, it may be a glass or plastic composite plate. The shape of the housing base is also not particularly limited, and may be, for example, a 2.5D or 3D housing, that is, a housing base whose main body surface is a flat surface or an arc surface, and the housing base may have two or 4 side walls.
In another aspect of the present application, an electronic device is presented. Referring to fig. 6, the electronic device 4000 includes the housing assembly 3000, the display screen 5000 and a motherboard (not shown in the figure), the display screen 5000 is connected to the motherboard, the display screen 5000 is accommodated in the accommodating space of the housing assembly 3000 via the motherboard, and the light-emitting side of the display screen 5000 is far away from the accommodating space of the housing assembly 3000, so as to display the image. Therefore, the electronic equipment has at least one of the advantages of good appearance texture, low production cost and the like.
The present application is described below by way of specific examples, and those skilled in the art will appreciate that the following specific examples are for illustrative purposes only and do not limit the scope of the present application in any way. In addition, in the following examples, materials and equipment used are commercially available unless otherwise specified. If in the examples that follow, specific processing conditions and processing methods are not explicitly described, processing may be performed using conditions and methods known in the art.
In the description of the present application, the terms "upper", "lower", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present application but do not require that the present application must be constructed and operated in a specific orientation, and thus, cannot be construed as limiting the present application.
In the description herein, references to the description of "one embodiment," "another embodiment," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (15)
1. A decorative film, comprising:
the color filter comprises a first substrate, a second substrate and a third substrate, wherein one side of the first substrate is provided with a dyeing layer, and the colors of different positions of the dyeing layer are not completely the same;
the first adhesive layer is positioned on one side, away from the first base material, of the dyeing layer;
the second substrate has metal luster, and is attached to the first substrate through the first glue layer;
the decorative layer is positioned on one side, far away from the first adhesive layer, of the second substrate.
2. The decorative film of claim 1, wherein said second substrate has a plurality of polymer nano sub-layers laminated in sequence.
3. The decorative film of claim 1, wherein said first substrate is transparent and the material forming said first substrate comprises PET.
4. The decorative film of claim 1, wherein the first adhesive layer has a thickness of 7-9 μm, and the material forming the first adhesive layer comprises an ultraviolet light-curable adhesive.
5. The decorative film of claim 1, wherein the decorative layer comprises: at least one of a texture sub-layer and an optical coating sub-layer, and an under-ink sub-layer on a side of the decorative layer remote from the second substrate.
6. The decorative film of claim 5, wherein the material forming said texture sub-layer comprises uv transfer glue.
7. The decorative film according to claim 5, wherein the optical coating sublayer comprises a plurality of oxide sublayers laminated in sequence, and the total thickness of the optical coating sublayer is 50-200 nm;
or the optical coating sub-layer comprises a vacuum non-conductive electroplated layer, and the total thickness of the optical coating sub-layer is 1-5 microns.
8. The decorative film of claim 1, further comprising: and the second adhesive layer is positioned on one side of the first substrate, which is far away from the first adhesive layer.
9. A method of making a decorative film according to any one of claims 1 to 8, comprising:
providing a first substrate, and forming a dyeing layer on one side of the first substrate;
providing a second substrate, and forming a decorative layer on one side of the second substrate;
and adhering and fixing the first base material and the second base material by using a first adhesive layer, and enabling the dyeing layer to face the surface of one side of the second base material, which is not provided with the decorative layer.
10. The method of claim 9, wherein forming the dyed layer comprises:
at least one part of the first substrate is immersed in a solution containing dye and is extracted after being immersed, the speed of immersing the first substrate into the solution and/or the speed of extracting the first substrate from the solution are controlled, and different positions of the first substrate are contacted with the solution for different time periods, so that dyed layers with different colors at different positions are formed.
11. The method of claim 10, wherein the solution is contacted with the first substrate at a temperature of 80-85 degrees Celsius and for a time of 30-120 seconds,
optionally, at least 2/3 portions of the first substrate are passed into the solution;
optionally, before the first substrate is immersed in the solution, the second glue layer is formed on the surface of one side of the first substrate in advance, and a release film is adhered to the side of the second glue layer away from the first substrate.
12. The method of claim 9, wherein forming a decorative layer on one side of the second substrate comprises:
forming ultraviolet transfer printing glue on one side of the second base material through transfer printing, and forming a texture sub-layer through ultraviolet light curing;
forming an optical coating sub-layer on one side of the texture sub-layer far away from the second substrate;
forming a bottom covering ink sub-layer on one side of the optical coating sub-layer far away from the texture sub-layer through silk-screen printing ink;
optionally, before forming the decorative layer, the method further comprises the step of forming the first glue layer on the surface of the second substrate in advance, and adhering a release film on the side of the first glue layer away from the second substrate, wherein the decorative layer is formed on the side of the second substrate where the first glue layer is not arranged.
13. The method as claimed in claim 12, wherein the material for forming the uv transfer paste comprises urethane acrylate, the thickness of the uv transfer paste is 7-9 μm, and the uv irradiation energy of the uv curing is 1000-;
optionally, forming the optical coating sub-layer comprises: sputtering to form multiple sequentially laminated oxide sub-layers with a total thickness of 50-200nm, wherein the oxide sub-layers comprise SiO2Sublayer and TiO2The sub-layer, or forming the optical coating sub-layer, comprises: electroplating metal by using a vacuum non-conductive electroplating process to form a vacuum non-conductive electroplated layer, wherein the total thickness of the optical coated sub-layer is 1-5 microns, and the electroplated metal comprises at least one of Ag, Cu and Al;
optionally, forming the under-ink sub-layer comprises: performing first silk-screen printing on one side of the optical coating sub-layer, which is far away from the texture sub-layer, to form a first white printing layer, and performing first baking at 80 ℃ for 30 min; performing second screen printing on one side of the first white printing layer, which is far away from the optical coating sub-layer, to form a second white printing layer, and performing second baking at 80 ℃ for 30 min; carrying out a third silk-screen printing on one side of the second white printing layer far away from the first white printing layer to form a first black printing layer, carrying out a third baking at 80 ℃ for 60min,
the thicknesses of the first white printing layer, the second white printing layer and the first black printing layer are respectively and independently 8-12 microns.
14. A housing assembly, comprising:
a housing base formed of a transparent material;
the decorative film of any one of claims 1 to 8, which is located on a surface of one side of the housing base, and the first substrate side of the decorative film is disposed toward the housing base.
15. An electronic device, comprising:
the housing assembly of claim 14;
display screen and mainboard, the display screen with the mainboard links to each other, just the display screen with the mainboard all accomodate in casing subassembly's accommodation space.
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| CN202010060380.3A CN111263545A (en) | 2020-01-19 | 2020-01-19 | Decorative membrane, preparation method, shell assembly and electronic equipment |
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| CN202010060380.3A CN111263545A (en) | 2020-01-19 | 2020-01-19 | Decorative membrane, preparation method, shell assembly and electronic equipment |
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