CN116766816A - Preparation method of decorative layer, decorative layer and electronic equipment - Google Patents
Preparation method of decorative layer, decorative layer and electronic equipment Download PDFInfo
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- CN116766816A CN116766816A CN202310674962.4A CN202310674962A CN116766816A CN 116766816 A CN116766816 A CN 116766816A CN 202310674962 A CN202310674962 A CN 202310674962A CN 116766816 A CN116766816 A CN 116766816A
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Abstract
本申请实施例提供了一种装饰层的制备方法、装饰层和电子设备，所述制备方法包括：在子模上丝印纹理层，以在纹理层上形成纹理；在纹理层上贴合基材层；将贴合后的纹理层和基材层共同进行真空拓印；将真空拓印后的纹理层和基材层一同烘烤，然后去除子模，以得到装饰层。装饰层在进行装饰时，将纹理层上的纹理直接外露，避免纹理被其他结构覆盖，保证装饰层直接展示的光哑纹理效果。
Embodiments of the present application provide a preparation method of a decorative layer, a decorative layer and an electronic device. The preparation method includes: silk-printing a texture layer on a sub-mold to form a texture on the texture layer; laminating a base material on the texture layer layer; perform vacuum rubbing on the bonded texture layer and base material layer together; bake the vacuum rubbing texture layer and base material layer together, and then remove the sub-mold to obtain the decorative layer. When decorating the decorative layer, the texture on the texture layer is directly exposed to avoid the texture being covered by other structures and ensure the smooth and matte texture effect displayed directly on the decorative layer.
Description
Technical Field
The application belongs to the technical field of decorative structures, and particularly relates to a preparation method of a decorative layer, the decorative layer and electronic equipment.
Background
As the requirements of the functions and the appearance of the mobile phone are continuously improved by consumers, the appearance characteristics of the rear cover of the mobile phone are also more and more concerned. Most of traditional mobile phone rear covers are made of hard plastics or metal materials, so that the color of the rear cover is too single.
In the related art, the decorative layer is prepared by preparing a texture on leather and then spraying an anti-fouling layer on the leather. Although the decorative layer is attached to the mobile phone rear cover and then brings a certain texture effect, the anti-fouling layer covers the texture on the leather, so that the texture of the decorative layer is single, and the appearance aesthetic feeling of the rear cover is reduced.
Disclosure of Invention
The application aims to provide a preparation method of a decorative layer, the decorative layer and electronic equipment, which can solve the problem of single texture of the traditional decorative layer.
In order to solve the technical problems, the application is realized as follows:
in a first aspect, an embodiment of the present application provides a method for manufacturing a decorative layer, including:
silk screen printing a texture layer on the sub-die to form textures on the texture layer, wherein the texture layer comprises small molecule polyurethane;
attaching a substrate layer to the texture layer, wherein the substrate layer comprises macromolecular polyurethane;
jointly carrying out vacuum rubbing on the texture layer and the substrate layer after lamination;
and baking the texture layer and the substrate layer after the vacuum rubbing, and removing the sub-die to obtain the decorative layer.
In a second aspect, an embodiment of the present application provides a decorative layer, where the decorative layer is made by using the preparation method described in the first aspect, and the decorative layer includes:
the surface of one side of the texture layer forms textures through sub-dies;
and the substrate layer is attached to one side, far away from the texture, of the texture layer.
In a third aspect, an embodiment of the present application provides an electronic device, including a housing and the decorative layer of the second aspect;
the decorative layer is attached to the shell.
In the present application, there is provided a method of manufacturing a decorative layer, the method comprising: silk screen printing a texture layer on the sub-die to form textures on the texture layer, wherein the texture layer comprises micromolecular polyurethane; attaching a substrate layer on the texture layer, wherein the substrate layer comprises macromolecular polyurethane; carrying out vacuum rubbing on the attached texture layer and the substrate layer; and baking the texture layer and the substrate layer after the vacuum rubbing, and removing the sub-die to obtain the decorative layer. When the decorative layer is decorated, the textures on the texture layer are directly exposed, so that the textures are prevented from being covered by other structures, and the light dumb texture effect directly displayed by the decorative layer is ensured.
Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.
Drawings
The foregoing and/or additional aspects and advantages of the application will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a flow chart of a method of preparing a decorative layer according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a method for producing a decorative layer according to an embodiment of the present application;
fig. 3 is a schematic view of a decorative layer according to an embodiment of the present application.
Reference numerals:
1. a texture layer; 11. texture; 2. a substrate layer.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements throughout or elements having like or similar functionality. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The features of the application "first", "second" and the like in the description and in the claims may be used for the explicit or implicit inclusion of one or more such features. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.
In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
A method of manufacturing a decorative layer, and an electronic device according to embodiments of the present application are described below with reference to fig. 1 to 3.
As shown in fig. 1 and 2, a method for manufacturing a decorative layer according to some embodiments of the present application includes:
s101, silk-screen printing a texture layer on a sub-die to form textures on the texture layer;
s102, attaching a substrate layer on the texture layer;
s103, carrying out vacuum rubbing on the attached texture layer and the attached substrate layer together;
and S104, baking the texture layer and the substrate layer after the vacuum rubbing, and removing the sub-die to obtain the decorative layer.
Specifically, in step S101, the texture layer includes a small molecular Polyurethane (PU) having a molecular weight in the range of 500-8000; the texture liquid for forming the texture layer can be micromolecular PU liquid, a layer of texture liquid is silk-screened on the sub-die to obtain the texture layer, and the texture liquid can be evenly spread on the sub-die through silk-screening, so that the texture layer completely replicates the texture on the sub-die, and the texture is formed on one side, close to the sub-die, of the texture layer.
In step S102, the substrate layer includes macromolecular Polyurethane (PU), and the molecular weight of the macromolecular polyurethane ranges from 10000 to 200000; the substrate layer may be a leather layer comprising a macromolecular PU, and the substrate layer is applied to the side of the texture layer remote from the sub-mold and rolled under a rolling pressure in the range of 1-20kgf. The air bubbles between the substrate layer and the texture layer can be primarily discharged through rolling, the texture layer and the substrate layer are fully contacted and reacted, and the adhesive force between the substrate layer and the texture layer is ensured.
In step S103, the texture layer and the sub-mold attached with the substrate layer are put into a vacuum rubbing machine together and vacuumized, so as to further reduce air bubbles generated between the texture layers of the substrate layer in the silk-screen process and air bubbles in the texture layer due to the silk-screen process.
In step S104, the vacuumized substrate layer, texture layer and sub-mold are put into an oven together for baking, so as to cure the substrate layer and texture layer; and removing the sub-mold after baking, so as to obtain the decorative layer with the surface topological texture.
When the decorative layer provided by the embodiment of the application is used for decoration, the substrate layer can be attached to the surface of a decorated object, and then the texture layer is directly exposed, namely the texture on the texture layer is directly exposed, so that the texture is prevented from being covered by other structures, and the light dumb texture effect directly displayed by the decorative layer is ensured; the substrate layer is of a flat single-layer structure, and the flatness and the attaching effect of the decorative layer can be ensured without texture on the substrate layer.
And as the texture layer can realize the dirt resistance and smooth hand feeling, coating or spraying can be omitted on the texture layer, and the effect stability of the smooth texture on the texture layer is ensured.
The preparation method of the decorative layer provided by the embodiment of the application comprises the following steps: silk screen printing a texture layer on the sub-die to form textures on the texture layer; attaching a substrate layer to the texture layer; carrying out vacuum rubbing on the attached texture layer and the substrate layer; and baking the texture layer and the substrate layer after the vacuum rubbing, and removing the sub-die to obtain the decorative layer. When the decorative layer is decorated, the textures on the texture layer are directly exposed, so that the textures are prevented from being covered by other structures, and the light-dumb texture effect directly displayed by the decorative layer is ensured.
On the one hand, the vacuum rubbing can increase the thickness of the texture layer and meet the setting requirement of textures on the texture layer; on the other hand, the air bubbles generated between the texture layers of the substrate layer in the silk screen printing process and the air bubbles brought by the silk screen printing process in the texture layers can be reduced, and the laminating strength between the texture layers of the substrate layer and the structural integrity of the decorative layer are ensured.
Optionally, the sub-die is formed by laser engraving, photoetching or machining.
Specifically, the submodule can be a PET submodule for manufacturing textures through UV glue, when the textures are formed on the texture layer through the submodule, the problem that the traditional smooth and dumb integrated textures become dumb after being covered by the antifouling layer can be avoided, meanwhile, the diversity of texture effects on the texture layer can be improved, and the appearance expressive force of the decorative layer is enriched.
In addition, the production period of the sub-die matched with the vacuum rubbing process is about 5-7 days, and the production cost is about 1-3W, which is far lower than the processing period and cost of the traditional textured paper film.
Optionally, in the silk-screen process of the texture layer, the mesh number of the silk-screen net ranges from 80 meshes to 200 meshes, and the mesh distance of the silk-screen net ranges from 3 mm to 5mm.
The mesh number of the screen and the pitch of the screen are related to the depth of texture on the texture layer. Specifically, the larger the texture depth on the texture layer is, the smaller the mesh number of the silk screen is, so as to ensure the setting requirement of the texture on the texture layer.
Optionally, the thickness of the texture layer is in the range of 30-50 μm, and the depth of texture on the texture layer is in the range of 10-45 μm.
Specifically, the decorative layer obtained through the vacuum rubbing process not only can increase the thickness of the texture layer, but also can ensure the dirt-resistant and dirt-resistant effects of the texture layer. The substrate layer can be a PU substrate layer, the substrate layer is not textured, and the thickness of the substrate layer is about 400 mu m, so that the structural integrity and the attaching effect of the decorative layer are ensured.
When the mesh size of the screen mesh is matched with the texture depth on the texture layer, a screen mesh of 150-200 mesh screen can be used for the texture layer with the texture depth below 20 mu m, a screen mesh of 100-150 mesh screen can be used for the texture layer with the texture depth of 20-40 mu m, and a screen mesh of 80-100 mesh screen can be used for the texture layer with the texture depth above 40 mu m.
In addition, when the texture layer is silk-screened on the sub-die, the softer the scraping hardness of the silk-screen machine is, the larger the oil discharging amount is, the deeper the matched texture depth is; the scratch hardness in the method for preparing the decorative layer of the present application may be in the range of 60-80A, such as 65A, 70A or 75A.
The larger the installation angle of the scraper is, the larger the oil discharging amount is, and the deeper the matched texture depth is; the installation angle of the doctor blade in the preparation method of the decorative layer of the application can be 20-30 degrees, for example, the installation angle of the doctor blade is selected to be 22 degrees, 25 degrees or 28 degrees.
When the texture layer is silk-screened on the sub-die, the lower the silk-screen printing speed is, the larger the oil discharging amount is, and the deeper the matched texture depth is; the printing speed in the preparation method of the decorative layer can be in the range of 200-400mm/s.
Optionally, in the vacuum rubbing process, the vacuum degree ranges from-90 KPa to-101 KPa, the vacuumizing time ranges from 10 s to 60s, and the vacuumizing temperature ranges from 30 degrees to 80 degrees.
Specifically, in the vacuum rubbing process, the vacuum degree can be in the range of-90 KPa to-101 KPa, and the vacuum rubbing can pump away bubbles between the substrate layer and the texture layer and bubbles in the texture layer caused by the silk screen printing process, so that the appearance effect of the decorative layer is ensured; meanwhile, the speed of eliminating bubbles in the substrate layer and the texture layer can be improved by increasing the vacuumizing temperature by 30-80 degrees, for example, the vacuumizing temperature of 50 degrees, 60 degrees or 70 degrees is selected.
Optionally, in the baking process, the baking temperature ranges from 70 degrees to 110 degrees, and the baking time ranges from 1h to 3h.
Specifically, in the process of baking the texture layer and the substrate layer together, the texture layer can be solidified and the reaction between the texture layer and the substrate layer is promoted, so that the adhesive force between the texture layer and the substrate layer is ensured, and the reliability of the substrate layer is improved.
Optionally, the texture liquid forming the texture layer comprises a solid component and a diluent;
the weight portion of the solid component ranges from 60 to 65, and the weight portion of the diluent ranges from 35 to 40.
Specifically, under the condition that the weight part of the diluent is in the range of 35-40, namely the viscosity of the solid component can be increased by reducing the proportion of the diluent, the volatilization speed of the diluent in the solid component is reduced, and the thickness of the texture layer can be increased, so that the texture can be formed on the texture layer conveniently.
Optionally, the diluent comprises one or a combination of two of ethylene glycol butyl ether and dibasic ester.
In particular, in order to ensure that the viscosity of the texture liquid remains stable during the silk-screen printing process, a high boiling point diluent may be used to reduce the volatilization speed of the diluent, for example, a high boiling point ester solvent such as ethylene glycol butyl ether (butyl ether) and dibasic ester (DBE) may be used as the diluent.
Optionally, the solid component comprises a main resin;
the main resin comprises one or two of polyester polyols grafted with fluorosilicone functional groups and fluorocarbon functional groups and polyester polyols containing isocyanate chain segments.
Specifically, the polyester polyol may be an alkyd-based polyester polyol, an acrylic-based polyester polyol, or a mixed dibasic acid polyester polyol. In order to improve the touch and meat feel of the texture layer, a fluorosilicone functional group (-Si-Fn) and a fluorocarbon functional group (-C-Fn) may be grafted on the polyester-based polyol to increase the touch of the texture layer; at the same time, isocyanate (-n=c=o) chain segments can be introduced on the polyester polyol, and the isocyanate chain segments can improve the crystallinity of the polyester polyol, thereby controlling the hardness and the chemical resistance of the texture layer.
In addition, the solid component further comprises a curing agent, which may specifically comprise a fatty amine or polyamide curing agent.
Optionally, the solid component further comprises an antifoaming agent;
the mass percentage of the defoaming agent in the solid components is in the range of 0.2% -1%.
Specifically, since bubbles are generated when the texture layer passes through the screen plate in the screen printing process, in order to improve the bubbles generated in the screen printing process, an organosilicon modified defoamer, a polymer defoamer or a polyvinyl alcohol defoamer can be added into the texture liquid, wherein the organosilicon modified defoamer mainly comprises modified polydimethylsilane, and the molecular structure of the polydimethylsilane is as follows:
because the organosilicon modified defoaming agent contains silicon groups, the organosilicon modified defoaming agent has stronger hydrophobicity, can reduce the surface tension of the texture layer, and can thin the thickness of the bubble film in the texture layer, thereby destroying the bubble in the texture layer and achieving the defoaming effect.
Optionally, the solid component further comprises a drier;
the mass percentage of the drier in the solid component ranges from 0.3% to 1%.
Specifically, in order to ensure rapid drying of the texture layer and the substrate layer after the vacuum rubbing process, a drier of metal carboxylate may be added to the texture liquid.
In one embodiment, the weight ratio of the solid component of the texturing solution to the diluent used for the pad printing is 2:1, the solid component comprises main resin, a curing agent, an antifoaming agent and a drier, wherein the weight ratio of the main resin to the curing agent to the antifoaming agent to the drier is 76.3:22.9:0.5: and 0.3, respectively mixing the components with the diluent according to the proportion, and uniformly stirring by using a stirrer to obtain the texture liquid, wherein the stirring speed is 1000-1500r/min, and the stirring time is 1-2h.
Referring to fig. 3, an embodiment of the present application provides a decorative layer, which is manufactured by using the manufacturing method of the decorative layer, and the decorative layer includes:
a texture layer 1, wherein one side surface of the texture layer 1 forms a texture 11 through a sub-die;
and the substrate layer 2 is attached to one side, far away from the texture 11, of the texture layer 1.
Specifically, the texture liquid for forming the texture layer 1 may be a small molecule PU liquid, specifically including a main resin, a curing agent, a defoaming agent, a drier, and a diluent, and the diluent may be added into each component to dilute the components, and then the component liquids are mixed to obtain the texture liquid. The substrate layer 2 may be a leather layer comprising a macromolecule PU.
When the decorative layer is decorated, the textures 11 on the texture layer 1 are directly exposed, so that the light dumb texture effect directly displayed by the decorative layer can be ensured.
The embodiment of the application provides electronic equipment, which comprises a shell and a decorative layer, wherein the shell is provided with a plurality of decorative layers;
the decorative layer is attached to the shell.
Specifically, the decorative layer can comprise three steps of pre-attaching, hot pressing and cold pressing when being attached to the shell.
Pre-laminating: under the conditions that the bonding temperature is 160+/-10 ℃, the bonding time is 5+/-3 seconds and the bonding air pressure is 0.4+/-0.2 MPa, a hot-melt adhesive in the plane area of the back surface of the substrate layer is activated in advance by using a hot press, so that the bonding alignment accuracy of the shell and the substrate layer is ensured;
hot pressing: under the conditions that the hot pressing temperature is 165+/-10 ℃, the hot pressing time is 30+/-5 s and the hot pressing pressure is 1.1+/-0.5 kg, the hot melt adhesive on the back surface of the substrate layer is completely activated by using a hot press, so that the substrate layer is firmly attached to the shell, and the adhesive force of the substrate layer is ensured;
cold pressing: and (3) cooling and shaping the hot melt adhesive activated on the back surface of the substrate layer by using a cold press under the condition that the cold press pressure is 0.8+/-0.3 Torr and the cold press time is 20+/-5 seconds, so as to ensure the surface flatness of the decorative layer.
The decorative layer can be used on electronic equipment with leather materials such as notebooks, flat plates or watchbands, and can also be used on the surfaces of interior leather such as automobiles or the surfaces of traditional leather such as shoe bags.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the application, the scope of which is defined by the claims and their equivalents.
Claims (13)
1. A method of making a decorative layer, comprising:
silk screen printing a texture layer on the sub-die to form textures on the texture layer, wherein the texture layer comprises small molecule polyurethane;
attaching a substrate layer to the texture layer, wherein the substrate layer comprises macromolecular polyurethane;
jointly carrying out vacuum rubbing on the texture layer and the substrate layer after lamination;
and baking the texture layer and the substrate layer after the vacuum rubbing, and removing the sub-die to obtain the decorative layer.
2. The method of claim 1, wherein the sub-mold is formed by laser engraving, photolithography, or machining.
3. The method according to claim 1, wherein in the silk-screen process of the texture layer, the mesh number of the silk-screen mesh is in the range of 80-200 mesh, and the mesh distance of the silk-screen mesh is in the range of 3-5mm.
4. The method of claim 1, wherein the texture layer has a thickness in the range of 30-50 μm and a texture depth on the texture layer in the range of 10-45 μm.
5. The method according to claim 1, wherein in the vacuum rubbing process, the vacuum degree ranges from-90 KPa to-101 KPa, the vacuum time ranges from 10 to 60s, and the vacuum temperature ranges from 30 to 80 °.
6. The method according to claim 1, wherein in the baking process, the baking temperature is in the range of 70 ° -110 °, and the baking time is in the range of 1h-3h.
7. The method of claim 1, wherein the texturing solution forming the textured layer comprises a solid component and a diluent;
the weight portion of the solid component ranges from 60 to 65, and the weight portion of the diluent ranges from 35 to 40.
8. The method of claim 7, wherein the diluent comprises one or a combination of two of ethylene glycol butyl ether and dibasic ester.
9. The method of claim 7, wherein the solid component comprises a main resin;
the main resin comprises one or two of polyester polyols grafted with fluorosilicone functional groups and fluorocarbon functional groups and polyester polyols containing isocyanate chain segments.
10. The method of claim 7, wherein the solid component further comprises an antifoaming agent;
the mass percentage of the defoaming agent in the solid components is in the range of 0.2% -1%.
11. The method of claim 7, wherein the solid component further comprises a drier;
the mass percentage of the drier in the solid component ranges from 0.3% to 1%.
12. A decorative layer produced by the production method according to any one of claims 1 to 11, comprising:
a texture layer (1), wherein one side surface of the texture layer (1) forms a texture (11) through a sub-die;
and the substrate layer (2) is attached to one side, far away from the texture (11), of the texture layer (1).
13. An electronic device comprising a housing and the decorative layer of claim 12;
the decorative layer is attached to the shell.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310674962.4A CN116766816A (en) | 2023-06-07 | 2023-06-07 | Preparation method of decorative layer, decorative layer and electronic equipment |
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| CN202310674962.4A CN116766816A (en) | 2023-06-07 | 2023-06-07 | Preparation method of decorative layer, decorative layer and electronic equipment |
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