Multi-layer structure with three-dimensional identification pattern and preparation method of multi-layer structure

Abstract

The invention relates to the technical field of electronic product shells, and discloses a multi-layer structure with a three-dimensional identification pattern and a preparation method of the multi-layer structure. The preparation method comprises the following steps: providing the prefabricated three-dimensional identification pattern layer; providing a first prefabricated release film, and placing the prefabricated three-dimensional identification pattern layer on a preset position of a release surface of the first prefabricated release film; a second prefabricated release film is provided, the prefabricated three-dimensional identification pattern layer and the release surface are coated with a layer of transparent adhesive, the transparent adhesive is covered with the release surface of the second prefabricated release film, rolling and curing are carried out, and a protective transparent layer is formed; stripping the first prefabricated release film to expose the first surface of the protective transparent layer, and preparing an inner decorative layer on the first surface to obtain a release decorative film; and preparing a first carrier layer on one side, far away from the first surface, of the inner decorative layer of the release decorative film, and stripping the second prefabricated release film to form a multi-layer structure with a three-dimensional identification pattern. The visual impact force and brand recognition degree of the multi-layer structure are improved, and the multi-layer structure is light and thin.

Description

Technical Field

[0001] The invention relates to the technical field of electronic product shells, and in particular to a multilayer structure with a three-dimensional identification pattern and a preparation method thereof. Background Art

[0002] With the continuous development of science and technology, electronic products (including but not limited to mobile phones, tablets, computers or watches) are moving towards intelligence, and the appearance of electronic products also directly affects the popularity of the product in the market.

[0003] At present, the surface patterns or logos with brand identification functions on the shell of electronic products are mostly flat-printed, lacking a three-dimensional sense, which reduces the visual impact and brand recognition of the electronic products; or the three-dimensional logo or pattern is inlaid on the shell of the electronic product through a groove inlay process. In order to ensure the strength during the inlay process, the thickness of the three-dimensional logo or pattern is generally required to be greater than 50um, resulting in the three-dimensional logo or pattern not being thin enough; or the three-dimensional logo or pattern is made through a glue filling process, which requires two substrates as carriers, resulting in the shell not being thin enough. Summary of the invention

[0004] The main purpose of the present invention is to provide a multilayer structure with a three-dimensional logo pattern and a preparation method thereof, aiming to solve the technical problems of the existing multilayer structure having poor visual impact and brand recognition, and being not frivolous.

[0005] To achieve the above object, the present invention provides a method for preparing a multilayer structure having a three-dimensional logo pattern, the preparation method comprising:

[0006] Providing a prefabricated three-dimensional logo pattern layer;

[0007] Providing a first prefabricated release film, and placing the prefabricated three-dimensional logo pattern layer on a preset position of a release surface of the first prefabricated release film;

[0008] Providing a second prefabricated release film, coating a layer of transparent adhesive on the prefabricated three-dimensional logo pattern layer and the release surface, and covering the release surface of the second prefabricated release film on the transparent adhesive, and rolling and curing to form a protective transparent layer;

[0009] Peeling off the first prefabricated release film to expose the first surface of the protective transparent layer, and preparing an inner decorative layer on the first surface to obtain a release decorative film;

[0010] A first carrier layer is prepared on a side of the inner decoration layer of the release decoration film away from the first surface, and the second prefabricated release film is peeled off to form the multilayer structure with the three-dimensional logo pattern.

[0011] Furthermore, in one embodiment, the step of providing a prefabricated three-dimensional logo pattern layer includes:

[0012] A substrate is provided, and according to a preset format of the three-dimensional logo pattern, the three-dimensional logo pattern is prepared on the substrate through a processing technology to form the three-dimensional logo pattern layer, and the processing technology includes one or more of electroforming, electroplating film cutting, injection molding, spraying and three-dimensional printing.

[0013] Further, in one embodiment, the step of preparing the interior decoration layer on the first surface includes:

[0014] The inner decoration layer is prepared by superimposing one or more processes selected from the group consisting of silk screen printing, UV transfer optical texture, electroplating, color printing, four-color printing, texture rubbing, pad printing, water transfer, laminating, and hot stamping on the first surface.

[0015] Further, in one embodiment, the step of preparing a first carrier layer on a side of the inner decoration layer away from the first surface and peeling off the second prefabricated release film to form the multilayer structure having the three-dimensional logo pattern is formed in two steps, including:

[0016] Mixing one or more of glass fiber, carbon fiber and Kevlar with liquid epoxy resin to form a prepreg of the first carrier layer, wherein the prepreg comprises a thermoplastic material or a thermosetting material;

[0017] The inner decoration layer and the prepreg are laminated and placed together in a first mold, and the first mold is heated and pressurized through a lamination process to cure the prepreg and form a bond with the inner decoration layer, and the second prefabricated release film is peeled off to form the multilayer structure with the three-dimensional logo pattern.

[0018] Further, in one embodiment, the step of preparing a first carrier layer on a side of the inner decoration layer of the release decorative film away from the first surface, and peeling off the second prefabricated release film, and the step of forming the multilayer structure having a three-dimensional logo pattern is divided into two steps, including:

[0019] Punching or hot pressing the release decorative film;

[0020] The molded release decorative film is placed in the injection mold, and the injection material and the inner decorative layer are injection molded by an in-mold insert injection molding process. After the injection molding is completed, the second prefabricated release film is peeled off to form the multi-layer structure with the three-dimensional logo pattern.

[0021] Further, in one embodiment, the step of preparing a first carrier layer on a side of the inner decoration layer away from the first surface and peeling off the second prefabricated release film to form the multilayer structure having the three-dimensional logo pattern is formed in two steps, including:

[0022] preparing a first adhesive layer on a side of the interior decoration layer away from the first surface;

[0023] Put metal or ceramic in the second mold, adhere the side of the first adhesive layer away from the inner decoration layer to the metal or ceramic, and perform welding and curing to obtain the first carrier layer, and peel off the second prefabricated release film to form the multilayer structure with the three-dimensional logo pattern.

[0024] Furthermore, in one embodiment, after peeling off the second prefabricated release film, the method further includes:

[0025] The surface of the transparent protective layer exposed by peeling off the second prefabricated release film is subjected to coloring, grinding, coating, rubbing or curtain coating to obtain an outer decorative layer.

[0026] The present invention also provides a method for preparing a multilayer structure having a three-dimensional logo pattern, the preparation method comprising:

[0027] Providing a prefabricated three-dimensional logo pattern layer;

[0028] Providing a transparent material layer, and placing the prefabricated three-dimensional logo pattern layer on a preset position of the transparent material layer;

[0029] Providing a second prefabricated release film, coating a layer of transparent adhesive on the transparent material layer, and covering the release surface of the second prefabricated release film on the transparent adhesive, and rolling and curing to form a protective transparent layer;

[0030] The second prefabricated release film is peeled off to form a multi-layer structure with a three-dimensional logo pattern.

[0031] Furthermore, in this embodiment, the step of providing a transparent material layer and placing the prefabricated three-dimensional logo pattern layer at a preset position of the transparent material layer further includes:

[0032] The other side of the transparent material layer away from the surface where the prefabricated three-dimensional logo pattern layer is placed is made by one or more superimposed processes including silk screen printing, UV transfer optical texture technology, electroplating technology, color printing technology, four-color color printing technology, texture rubbing technology, pad printing technology, water transfer technology, lamination technology, and hot stamping technology.

[0033] Furthermore, in this embodiment, a second prefabricated release film is provided, a layer of transparent adhesive is coated on the transparent material layer, and the release surface of the second prefabricated release film is covered on the transparent adhesive, and rolling and curing are performed to form a protective transparent layer, and the method further includes:

[0034] The side of the transparent material layer away from the prefabricated three-dimensional logo pattern layer is processed by silk screen printing, UV transfer optical texture technology, electroplating technology, color printing technology, four-color color printing technology, texture rubbing technology, pad printing technology, water transfer technology, lamination technology, and hot stamping technology.

[0035] The present invention also provides a method for preparing a multilayer structure having a three-dimensional logo pattern, the preparation method comprising:

[0036] Providing a prefabricated three-dimensional logo pattern layer;

[0037] Providing a first prefabricated release film, and placing the prefabricated three-dimensional logo pattern layer on a preset position of a release surface of the first prefabricated release film;

[0038] Providing a second prefabricated release film, coating a layer of transparent adhesive on the prefabricated three-dimensional logo pattern layer and the release surface, and covering the release surface of the second prefabricated release film on the transparent adhesive, and rolling and curing to form a protective transparent layer;

[0039] Peeling off the first prefabricated release film to expose the first surface of the protective transparent layer, and preparing a decorative explosion-proof layer on the first surface;

[0040] Peeling off the second prefabricated release film to expose the second surface of the protective transparent layer, and preparing a second adhesive layer on the second surface;

[0041] A second carrier layer is prepared on a side of the second adhesive layer away from the second surface to form the multilayer structure having the three-dimensional logo pattern.

[0042] Furthermore, in one embodiment, the material of the second carrier layer is transparent glass or transparent plastic.

[0043] The present invention also provides a method for preparing a multilayer structure having a three-dimensional logo pattern, the preparation method comprising:

[0044] Providing a prefabricated three-dimensional logo pattern layer;

[0045] Providing a transparent material layer, and placing the prefabricated three-dimensional logo pattern layer on a preset position of the transparent material layer;

[0046] Providing a second prefabricated release film, coating a layer of transparent adhesive on the transparent material layer, and covering the release surface of the second prefabricated release film on the transparent adhesive, and rolling and curing to form a protective transparent layer;

[0047] Peeling off the second prefabricated release film to expose the second surface of the protective transparent layer, and preparing a second adhesive layer on the second surface;

[0048] A second carrier layer is prepared on a side of the second adhesive layer away from the second surface to form a multi-layer structure with a three-dimensional logo pattern.

[0049] Furthermore, in one embodiment, a transparent material layer is provided, and the step of placing the prefabricated three-dimensional logo pattern layer at a preset position of the transparent material layer further includes:

[0050] The transparent material layer is processed by silk screen printing, UV transfer optical texture technology, electroplating technology, color printing technology, four-color color printing technology, texture rubbing technology, pad printing technology, water transfer technology, lamination technology, and hot stamping technology.

[0051] Furthermore, in one embodiment, after providing a second prefabricated release film, coating a layer of transparent adhesive on the transparent material layer, and covering the release surface of the second prefabricated release film on the transparent adhesive, rolling and curing, and forming a protective transparent layer, the method further includes:

[0052] The side of the transparent material layer away from the prefabricated three-dimensional logo pattern layer is processed by silk screen printing, UV transfer optical texture technology, electroplating technology, color printing technology, four-color color printing technology, texture rubbing technology, pad printing technology, water transfer technology, lamination technology, and hot stamping technology.

[0053] The present invention also provides a multi-layer structure having a three-dimensional logo pattern, the multi-layer structure comprising a first carrier layer;

[0054] an inner decoration layer, wherein the inner decoration layer is disposed on the first carrier layer;

[0055] A prefabricated three-dimensional logo pattern layer, wherein the prefabricated three-dimensional logo pattern layer is arranged on the inner decoration layer;

[0056] A protective transparent layer is covered on the prefabricated three-dimensional logo pattern layer and the decorative layer.

[0057] Furthermore, in one embodiment, the multilayer structure further includes a first adhesive layer, and the first adhesive layer is disposed between the inner decoration layer and the first carrier layer.

[0058] The present invention also provides a multi-layer structure with a three-dimensional logo pattern, the multi-layer structure comprising:

[0059] Decorative explosion-proof layer;

[0060] A prefabricated three-dimensional logo pattern layer, wherein the prefabricated three-dimensional logo pattern layer is arranged on the decorative explosion-proof layer;

[0061] A protective transparent layer, the protective transparent layer covering the decorative explosion-proof layer and the prefabricated three-dimensional logo pattern layer;

[0062] a second adhesive layer, the second adhesive layer being disposed on the protective transparent layer;

[0063] A second carrier layer is disposed on the protective transparent layer.

[0064] The present invention also provides a method for preparing a multilayer structure having a three-dimensional logo pattern, the preparation method comprising:

[0065] Providing a prefabricated three-dimensional logo pattern layer;

[0066] Providing a second prefabricated release film, and placing the prefabricated three-dimensional logo pattern layer on a preset position of the second prefabricated release film;

[0067] Providing a transparent material layer, coating a layer of transparent adhesive on the second prefabricated release film, and covering the transparent material layer on the transparent adhesive, and rolling and curing to form a protective transparent layer;

[0068] The second prefabricated release film is peeled off to form a multi-layer structure with a three-dimensional logo pattern.

[0069] Further, in this embodiment, after peeling off the second prefabricated release film, the method further includes:

[0070] After peeling off the second prefabricated release film, one or more processes are performed on the side away from the transparent material layer, such as silk screen printing, UV transfer optical texture process, electroplating process, color printing process, four-color color printing process, texture rubbing process, pad printing process, water transfer process, lamination process, and hot stamping process, to form the multi-layer structure with the three-dimensional logo pattern.

[0071] Further, in this embodiment, after the second prefabricated release film is peeled off, the side away from the transparent material layer is subjected to one or more superimposed processing of the inner decorative surface by silk screen printing, UV transfer optical texture process, electroplating process, color printing process, four-color color printing process, texture rubbing process, pad printing process, water transfer process, laminating process, hot stamping process, etc., further comprising:

[0072] A second carrier is provided, wherein the second carrier is bonded to the inner decorative surface.

[0073] Furthermore, in this embodiment, a transparent material layer is provided, and after the transparent material layer is provided, a layer of transparent adhesive is coated on the second prefabricated release film, and the transparent material layer is covered on the transparent adhesive, and rolled and cured to form a protective transparent layer, the method further includes:

[0074] The transparent material layer is far away from the surface attached to the second prefabricated release film, and an outer decorative layer with an optical texture can be prefabricated through a transfer process.

[0075] The present invention provides a multi-layer structure with a three-dimensional logo pattern, the multi-layer structure comprising:

[0076] External decorative layer;

[0077] A transparent material layer, the outer decorative layer is arranged on the transparent material layer;

[0078] A prefabricated three-dimensional logo pattern layer, wherein the prefabricated three-dimensional logo pattern layer is arranged on the transparent material layer;

[0079] A protective transparent layer, the protective transparent layer covering the inner decoration layer and the prefabricated three-dimensional logo pattern layer;

[0080] An inner decoration layer, the inner decoration layer is arranged on the protective transparent layer;

[0081] a second adhesive layer, the second adhesive layer being disposed on the inner decoration layer;

[0082] A second carrier layer, wherein the second adhesive layer is arranged on the second carrier layer.

[0083] In the technical solution provided by the present invention, a prefabricated three-dimensional logo pattern is placed on a first prefabricated release film, a layer of transparent adhesive is coated on the prefabricated three-dimensional logo pattern and the first release film, and then a second prefabricated release film is attached to the transparent adhesive, and the second prefabricated release film is heated and baked to be cured to form a protective transparent layer, so that the transparent adhesive adheres to the prefabricated three-dimensional logo pattern, and then the first prefabricated release film is peeled off, and an inner decorative layer is prepared on the surface of the protective transparent layer after the first prefabricated release film is peeled off, a first carrier layer is arranged on the inner decorative layer, and then the second prefabricated release film is peeled off, and it can be selected according to actual conditions whether to perform surface treatment on the surface of the protective transparent layer after the second prefabricated release film is peeled off to increase the wear resistance and durability of the multi-layer structure; the multi-layer structure does not need to be grooved and inlaid on the product surface, so that the production cost is lower and the efficiency is improved. Higher; there is no need for two substrates as carriers, making the final multi-layer structure lighter and thinner in design; by adopting three-dimensional forming technologies such as electroforming, electroplating plastic sheet cutting, injection molding or three-dimensional printing, or using all natural materials such as metal, solid wood, cloth or leather for machining to form a three-dimensional logo pattern, the prefabricated three-dimensional logo pattern is more three-dimensional, realistic and thinner, thereby improving the visual impact and brand recognition of the multi-layer structure; after completing the preparation of the protective transparent layer and the prefabricated three-dimensional logo pattern, it is possible to continue to carry out the construction of decorative processes such as color printing, texture transfer, silk screen printing, laser engraving, as well as the production of molding processes such as lamination, high pressure, hot pressing, injection molding, etc., that is, it has the characteristics of continuous processing under the same positioning method, thereby ensuring the precise alignment of the prefabricated three-dimensional logo pattern with the subsequent decorative pattern or product appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0084] One or more embodiments are exemplarily described by corresponding drawings, which do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and the figures in the drawings do not constitute proportional limitations unless otherwise stated.

[0085] Figure 1 It is a schematic flow chart of a first embodiment of a method for preparing a multilayer structure having a three-dimensional identification pattern in an embodiment of the present invention;

[0086] Figure 2 It is a schematic flow chart of a second embodiment of a method for preparing a multilayer structure having a three-dimensional identification pattern in an embodiment of the present invention;

[0087] Figure 3 It is a schematic flow chart of a third embodiment of a method for preparing a multilayer structure having a three-dimensional identification pattern in an embodiment of the present invention;

[0088] Figure 4 It is a schematic flow chart of a fourth embodiment of a method for preparing a multilayer structure having a three-dimensional identification pattern in an embodiment of the present invention;

[0089] Figure 5 is a schematic structural diagram of a multi-layer structure with a three-dimensional logo pattern in an embodiment of the present invention;

[0090] Figure 6 It is a schematic structural diagram of a multi-layer structure with a three-dimensional logo pattern provided with a first adhesive layer in an embodiment of the present invention;

[0091] Figure 7 It is a schematic flow chart of a fifth embodiment of a method for preparing a multilayer structure having a three-dimensional identification pattern in an embodiment of the present invention;

[0092] Figure 8 Another structural schematic diagram of a method for preparing a multilayer structure with a three-dimensional logo pattern in an embodiment of the present invention

[0093] Fig. 9 It is a schematic flow chart of a sixth embodiment of the method for preparing a multilayer structure having a three-dimensional identification pattern in an embodiment of the present invention;

[0094] Fig.10 It is a schematic flow chart of a seventh embodiment of a method for preparing a multilayer structure having a three-dimensional identification pattern in an embodiment of the present invention;

[0095] Fig.11 It is a schematic flow chart of the eighth embodiment of the method for preparing a multilayer structure with a three-dimensional identification pattern in the embodiment of the present invention.

[0096] Among them, 100, multi-layer structure; 10, first carrier layer; 20, inner decoration layer; 30, prefabricated three-dimensional logo pattern layer; 40, protective transparent layer; 50, first adhesive layer; 60, decorative explosion-proof layer; 70, second adhesive layer; 80, second carrier layer. DETAILED DESCRIPTION

[0097] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on another element, or there can be one or more centered elements therebetween. When an element is described as "connected" to another element, it can be directly connected to another element, or there can be one or more centered elements therebetween. The terms "vertical", "horizontal", "left", "right", "inside", "outside" and similar expressions used in this specification are only for illustrative purposes. In the description of the present invention, the terms "first" and "second" are used only for descriptive purposes and cannot be understood as indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, unless otherwise specified, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; the meaning of "multiple" is two or more. The term "include" and any variation thereof means non-exclusive inclusion, and one or more other features, integers, steps, operations, units, components and / or combinations thereof may be present or added.

[0098] In addition, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or a connection between two components. All technical and scientific terms used in this specification have the same meaning as those generally understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0099] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0100] For ease of understanding, the specific process of the embodiment of the present invention is described below. Figure 1 The present invention discloses a method for preparing a multilayer structure having a three-dimensional logo pattern, and the first embodiment includes:

[0101] S101, providing a prefabricated three-dimensional logo pattern layer;

[0102] The above steps include: providing a substrate, preparing the three-dimensional logo pattern on the substrate through a processing technology according to the preset format of the three-dimensional logo pattern, and the processing technology includes one or more of electroforming, electroplating film cutting, injection molding, spraying and three-dimensional printing.

[0103] In this embodiment, the three-dimensional identification pattern can be a logo that serves as an identification, or a pattern that serves as a decoration. According to actual conditions, suitable materials for making the pattern or logo can be selected from mother-of-pearl, metal, solid wood, cloth or leather, and then mechanically processed according to the shape and size of the pre-designed logo or pattern layout; or one or more processing techniques such as electroforming, electroplating film cutting, injection molding, spraying and three-dimensional printing can be used to superimpose a three-dimensional identification pattern layer on the substrate. The above two methods can produce logos and patterns with obvious three-dimensionality and realism, which are compared with traditional printed logos and patterns.

[0104] S102, providing a first prefabricated release film, and placing the prefabricated three-dimensional logo pattern layer on a preset position of a release surface of the first prefabricated release film;

[0105] In this embodiment, the release surface of the first prefabricated release film can be a flat surface or a textured surface with a texture structure that has been textured, which can be selected according to actual requirements during the production process; the first prefabricated release film can be a film of various materials with a release function that is directly purchased, such as PC (polycarbonate) or PET (polyethylene terephthalate plastic), etc., or it can be a film of a suitable material such as PET or PC, on which a layer of textured release glue is transferred, and this glue has adhesion to the selected PET or PC film. For example, during the operation, the "transparent resin or colloid" has no adhesion, so a release film with a texture is formed; the prefabricated three-dimensional logo pattern layer is placed on a preset position of the release surface of the first prefabricated release film, and the preset position is a position planned in advance. The first prefabricated release film can be placed on a workbench with a preset position. Since the first prefabricated release film is transparent, the preset position displayed on the workbench can be seen, and then the prefabricated three-dimensional logo pattern layer is placed on the preset position.

[0106] S103, providing a second prefabricated release film, coating a layer of transparent adhesive on the prefabricated three-dimensional logo pattern layer and the release surface, and covering the release surface of the second prefabricated release film on the transparent adhesive, and rolling and curing to form a protective transparent layer;

[0107] In this embodiment, the protective transparent layer and the prefabricated three-dimensional logo pattern are covered and fixed into shape by the first prefabricated release film and the second prefabricated release film, so that the prefabricated three-dimensional logo pattern does not need to ensure the strength during the inlay process, and the thickness of the prefabricated three-dimensional logo pattern is generally greater than 50um, so that the thickness of the prefabricated three-dimensional logo pattern can be set to 10um~50um, so the prefabricated three-dimensional logo pattern is lighter and thinner. In addition, the production method of covering and fixing the protective transparent layer and the prefabricated three-dimensional logo pattern by the first prefabricated release film and the second prefabricated release film is not only more convenient, low-cost and efficient than the traditional slotted inlay method, but also does not need to damage the original decorative surface of the product.

[0108] The release surface of the second prefabricated release film can be a flat surface or a textured surface with a texture structure that has been textured, which can be selected according to actual requirements during the production process; the second prefabricated release film can be a film of various materials with release function that is directly purchased, such as PC or PET, etc., or it can be a film of suitable PET (polyethylene terephthalate plastic) or PC (polycarbonate) and a layer of textured release glue is transferred on it. This glue has adhesion to the selected PET or PC and other material films. If the "transparent resin or colloid" has no adhesion during the operation, a release film with a texture is formed.

[0109] A layer of liquid transparent adhesive is applied on the release surface of the prefabricated three-dimensional logo pattern layer and the first prefabricated release film. The adhesive may be a resin or glue. The resin may be epoxy resin, polyimide resin, bismaleimide (BMI) resin or vinyl ester resin, etc. The glue may be acrylic glue, polyurethane glue or epoxy glue. The plane or textured surface of the second release film is covered on the transparent adhesive in a contact manner to form a film sheet as a whole. The film sheet as a whole is then placed on a rolling device such as a transfer machine or a laminator for rolling to achieve the effect of flattening and exhausting. After the film sheet is rolled as a whole, it is cured. The transparent adhesive may be cured by UV curing, heating and baking or natural cooling to form a protective transparent layer. The protective transparent layer can prevent the prefabricated three-dimensional logo pattern from being damaged and allow the user to see the prefabricated three-dimensional logo pattern through the protective transparent layer, thereby enhancing the three-dimensional sense and beauty of the multi-layer structure.

[0110] For example, the UV curing parameters depend on the setting parameters of the curing glue. Since the glue has different components, the curing lamp group can be used in combination, mainly ultraviolet light 10-400nm, and the UV curing energy is mainly 50-5000hj / square centimeter. The baking time depends on the curing parameters of the thermosetting glue. The curing parameters are 60°-90° and the curing time is 30 minutes-1 hour.

[0111] S104, peeling off the first prefabricated release film to expose the first surface of the protective transparent layer, and preparing an inner decorative layer on the first surface to obtain a release decorative film;

[0112] The above steps include: preparing the interior decoration layer on the first surface by superimposing one or more processes selected from the group consisting of silk screen printing, UV transfer optical texture process, electroplating process, color printing process, four-color color printing process, texture rubbing process, pad printing process, water transfer process, lamination process, and hot stamping process.

[0113] In this embodiment, after the protective transparent layer is cured, the first prefabricated release film is peeled off from the protective transparent layer, and the first surface of the protective transparent layer is exposed after peeling. On the first surface, the inner decoration layer is prepared by superimposing one or more processes selected from the group consisting of silk screen printing, UV transfer optical texture technology, electroplating, color printing, four-color color printing, texture rubbing, pad printing, water transfer, laminating, and hot stamping. After the preparation of the protective transparent layer and the prefabricated three-dimensional logo pattern is completed, one or more processes selected from the group consisting of silk screen printing, UV transfer optical texture technology, electroplating, color printing, four-color color printing, texture rubbing, pad printing, water transfer, laminating, and hot stamping can be continued. The construction, as well as the production of molding processes such as lamination, high pressure, hot pressing, and injection molding, have the characteristics of continuous processing under the same positioning mode, thus ensuring the precise alignment of the prefabricated three-dimensional logo pattern with the subsequent decorative pattern or product appearance; specifically, the inner decorative layer can be a color layer, a pattern layer, a varnish layer, etc., and the ink of the ink layer can be various color materials. In this embodiment, the ink is preferably a color material, in order to increase the color diversification effect of the multi-layer structure; illustratively, the printing screen of the inner decorative layer is designed according to actual needs, the printing screen is installed in a fixed position of the printing machine, the ink color is modulated according to the effect of the inner decorative layer, and the pattern or color is printed on the first surface. After the printed ink is cured, the inner decorative layer is formed to obtain a release decorative film. Since the protective transparent layer is transparent, the user can directly see the pattern or color on the inner decorative layer through the protective transparent layer, thereby improving the beauty of the multi-layer structure.

[0114] S105 , preparing a first carrier layer on a side of the inner decoration layer of the release decoration film away from the first surface, and peeling off the second prefabricated release film to form the multilayer structure with the three-dimensional logo pattern.

[0115] After the above steps, the method further includes: coloring, polishing, coating, rubbing or coating the surface of the transparent protective layer exposed by peeling off the second prefabricated release film to obtain an outer decorative layer.

[0116] In this embodiment, the material of the first carrier layer can be one or more of glass fiber, carbon fiber and Kevlar prepreg, glass, plastic, metal or ceramic. The first carrier layer serves as a base layer to provide load bearing and support. The first carrier layer is pasted on a surface of the inner decorative layer of the release decorative film away from the first surface of the protective transparent layer, and then the second prefabricated release film is peeled off from the protective transparent layer so that the protective transparent layer exposes the second surface, thereby obtaining a multilayer structure with a three-dimensional logo pattern. The multilayer structure is applied to electronic products, including but not limited to mobile phones, tablets, computers or watches, that is, the multilayer structure of the present invention can be a shell of a mobile phone, a shell of a tablet, a shell of a computer or a shell of a watch, etc. According to actual requirements, an outer decorative layer can be made on the second surface to further improve the beauty of the multilayer structure. The second surface can be processed by coloring, grinding, coating, rubbing texture or spray coating to further improve the wear resistance and durability of the multilayer structure.

[0117] Among them, the coloring is semi-transparent, and the prefabricated three-dimensional logo pattern can be seen through the color layer. The coloring can make the multi-layer structure achieve a dazzling color effect. Polishing is a surface modification technology, which generally refers to a processing method that uses rough objects (such as sandpaper containing high hardness particles) to change the physical properties of the material surface through friction. The main purpose is to obtain a specific surface roughness and improve the wear resistance and durability of the second surface; rubbing textures can improve the user's touch and enhance the three-dimensional sense of the multi-layer structure.

[0118] In this embodiment, a prefabricated three-dimensional logo pattern is placed on a first prefabricated release film, a layer of transparent adhesive is coated on the prefabricated three-dimensional logo pattern and the first release film, and then a second prefabricated release film is attached to the transparent adhesive, and the second prefabricated release film is heated and baked to form a protective transparent layer, so that the transparent adhesive adheres to the prefabricated three-dimensional logo pattern, and then the first prefabricated release film is peeled off, and an inner decorative layer is prepared on the surface of the protective transparent layer after the first prefabricated release film is peeled off, a first carrier layer is arranged on the inner decorative layer, and then the second prefabricated release film is peeled off, and it can be selected whether to perform surface treatment on the surface of the protective transparent layer after the second prefabricated release film is peeled off according to actual conditions to increase the wear resistance and durability of the multi-layer structure; the multi-layer structure does not need to be grooved and inlaid on the product surface, so that the production cost is lower and the efficiency is higher; No two substrates are required as carriers, making the final multi-layer structure lighter and thinner in design; electroforming, electroplating plastic sheet cutting, injection molding, spraying or 3D printing are used to form a three-dimensional logo pattern, or various natural materials such as metal, solid wood, cloth or leather are used to mechanically process the three-dimensional logo pattern, so that the prefabricated three-dimensional logo pattern is more three-dimensional, realistic and thinner, thereby improving the visual impact and brand recognition of the multi-layer structure; after completing the preparation of the protective transparent layer and the prefabricated three-dimensional logo pattern, the construction of decorative processes such as color printing, texture transfer, silk screen, laser engraving, as well as the production of molding processes such as lamination, high pressure, hot pressing, injection molding, etc. can be continued, that is, it has the characteristics of continuous processing under the same positioning method, thereby ensuring the precise alignment of the prefabricated three-dimensional logo pattern with the subsequent decorative pattern or product appearance.

[0119] See also Figure 2 The present invention discloses a second embodiment of a method for preparing a multilayer structure having a three-dimensional logo pattern, including:

[0120] S201, providing a prefabricated three-dimensional logo pattern layer;

[0121] S202, providing a first prefabricated release film, and placing the prefabricated three-dimensional logo pattern layer on a preset position of a release surface of the first prefabricated release film;

[0122] S203, providing a second prefabricated release film, coating a layer of transparent adhesive on the prefabricated three-dimensional logo pattern layer and the release surface, and covering the release surface of the second prefabricated release film on the transparent adhesive, and rolling and curing to form a protective transparent layer;

[0123] S204, peeling off the first prefabricated release film to expose the first surface of the protective transparent layer, and preparing an inner decorative layer on the first surface to obtain a release decorative film;

[0124] In this embodiment, the description of the above steps 201, 202, 203 and 204 refers to the first embodiment, and will not be further described in this embodiment.

[0125] S205, mixing one or more of glass fiber, carbon fiber and Kevlar with liquid epoxy resin to form a prepreg of the first carrier layer; the prepreg comprises a thermoplastic material or a thermosetting material;

[0126] In this embodiment, the specific method for preparing the prepreg is: by coating epoxy resin onto release paper or release film with a release function, two release films with epoxy resin are prepared, and then a fiber cloth is added between the epoxy resins of the two release films and pressed together using a press to obtain the prepreg.

[0127] S206, the inner decoration layer and the prepreg are laminated and placed together in a first mold, the first mold is heated and pressurized through a lamination process to solidify the prepreg and form a bond with the inner decoration layer, and the second prefabricated release film is peeled off to form a multilayer structure with a three-dimensional logo pattern, wherein the shape of the mold can be pre-designed as needed.

[0128] In this embodiment, the steps of heating and pressurizing the first mold to solidify the prepreg through the lamination process are as follows: the first mold can be a hot press, the inner decoration layer and the prepreg are laminated and placed together in the hot press, and the hot press is heated to 120℃-150℃ for baking for 3 minutes-10 minutes, and the pressure is gradually increased, wherein the increased pressure range is 5kgf / cm2-35kgf / cm2, and the pressure during the pressurization process is from low to high, and the continuous increase in pressure is conducive to the product bubble removal; after the prepreg is heated to about 100℃, the epoxy resin begins to soften and melt and begins to produce adhesion with the overall diaphragm, and then the epoxy resin is solidified by continuous high temperature curing to form a stable shape, and a multi-layer structure with a three-dimensional logo pattern is obtained. Whether the second surface is surface treated can be determined according to actual product requirements.

[0129] See also Figure 3 The third embodiment of the present invention discloses a method for preparing a multilayer structure having a three-dimensional logo pattern, including:

[0130] S301, providing a prefabricated three-dimensional logo pattern layer;

[0131] S302, providing a first prefabricated release film, and placing the prefabricated three-dimensional logo pattern layer on a preset position of a release surface of the first prefabricated release film;

[0132] S303, providing a second prefabricated release film, coating a layer of transparent adhesive on the prefabricated three-dimensional logo pattern layer and the release surface, and covering the release surface of the second prefabricated release film on the transparent adhesive, and rolling and curing to form a protective transparent layer;

[0133] S304, peeling off the first prefabricated release film to expose the first surface of the protective transparent layer, and preparing an inner decorative layer on the first surface to obtain a release decorative film;

[0134] In this embodiment, the description of the above steps 301, 302, 303 and 304 refers to the first embodiment, and will not be further described in this embodiment.

[0135] S305, punching or hot pressing the release decorative film;

[0136] In this embodiment, the release decorative film is punched or hot-pressed by a punching device or a hot-pressing device.

[0137] S306, placing the molded release decorative film into the injection mold, and injecting the injection material and the inner decorative layer through an in-mold insert injection molding process, and peeling off the second prefabricated release film after the injection molding is completed to form the multi-layer structure with the three-dimensional logo pattern.

[0138] In this embodiment, the material of the first carrier layer is a plastic material. The injection molding material is placed in the injection mold, and the inner decorative layer of the release decorative film formed by punching or hot pressing is adhered to the injection molding material. Then, the injection molding material and the inner decorative layer are injection molded through an in-mold insert injection molding process. After the injection molding is completed, the second prefabricated release film is peeled off to obtain a multi-layer structure with a three-dimensional logo pattern.

[0139] See also Figure 4 The fourth embodiment of the present invention discloses a method for preparing a multilayer structure having a three-dimensional logo pattern, including:

[0140] S401, providing a prefabricated three-dimensional logo pattern layer;

[0141] S402, providing a first prefabricated release film, and placing the prefabricated three-dimensional logo pattern layer on a preset position of a release surface of the first prefabricated release film;

[0142] S403, providing a second prefabricated release film, coating a layer of transparent adhesive on the prefabricated three-dimensional logo pattern layer and the release surface, and covering the release surface of the second prefabricated release film on the transparent adhesive, and rolling and curing to form a protective transparent layer;

[0143] S404, peeling off the first prefabricated release film to expose the first surface of the protective transparent layer, and preparing an inner decorative layer on the first surface to obtain a release decorative film;

[0144] In this embodiment, the description of the above steps 401, 402, 403 and 404 refers to the first embodiment, and will not be further described in this embodiment.

[0145] S405, preparing a first adhesive layer on a side of the interior decoration layer away from the first surface;

[0146] In this embodiment, a layer of OCA transparent optical glue, UV glue, hot melt glue or epoxy resin is coated on a surface of the inner decoration layer away from the first surface of the protective transparent layer, and then heated and baked to form a first adhesive layer.

[0147] S406, placing metal or ceramic in the second mold, attaching the side of the first adhesive layer away from the inner decoration layer to the metal or ceramic, and performing welding and curing to obtain the first carrier layer, and peeling off the second prefabricated release film to form the multilayer structure with the three-dimensional logo pattern.

[0148] In this embodiment, the second mold can be a hot press. Metal or ceramic is placed in the second mold, and a surface of the first adhesive layer away from the inner decorative layer is attached to the metal or ceramic. Then, heating is started to melt the first adhesive layer until the first adhesive layer is fully integrated with the metal or ceramic and the inner decorative layer, and then solidified, so that the first adhesive layer is fused with the inner decorative layer and the metal / ceramic to obtain a multi-layer structure with a three-dimensional logo pattern.

[0149] See also Figure 5 The embodiment of the present invention discloses a multilayer structure 100 having a three-dimensional logo pattern. The multilayer structure 100 having a three-dimensional logo pattern is made by the preparation method of any one of the first embodiment, the second embodiment or the third embodiment.

[0150] The multilayer structure 100 includes a first carrier layer 10, an inner decoration layer 20, a prefabricated three-dimensional logo pattern layer 30 and a protective transparent layer 40; the inner decoration layer 20 is arranged on the first carrier layer 10, and the arrangement of the inner decoration layer 20 makes the appearance of the multilayer structure richer and more dazzling; the prefabricated three-dimensional logo pattern layer 30 is arranged on the inner decoration layer 20, and the three-dimensional logo pattern of the prefabricated three-dimensional logo pattern layer 30 can be a logo that serves as an identification, or a pattern that serves as a decoration. It is made into a three-dimensional logo or pattern through three-dimensional processing technologies such as electroforming process, electroplastic film cutting process, injection molding spraying process or three-dimensional printing process, and all real materials such as metal, solid wood, cloth or leather are used, so that the produced logo and pattern have obvious three-dimensional and real sense, which is compared with traditional printed logos and patterns. Therefore, the setting of the prefabricated three-dimensional logo pattern layer 30 makes the multi-layer structure 100 have a stronger visual impact and a stronger three-dimensional sense, thereby improving the brand recognition. The protective transparent layer 40 covers the prefabricated three-dimensional logo pattern layer 30 and the inner decoration layer 20. The protective transparent layer 40 not only protects the prefabricated three-dimensional logo pattern layer 30 and the inner decoration layer 20 from being damaged, but also allows the user to see the prefabricated three-dimensional logo pattern 30 and the inner decoration layer 20 through the protective transparent layer.

[0151] Specifically, the material of the first carrier layer 10 can be glass fiber, carbon fiber and Kevlar prepreg or plastic. By setting a prefabricated three-dimensional logo pattern layer 30 in the protective transparent layer 40, and then preparing the interior decoration layer 20 and the first carrier layer 10 in sequence on the protective transparent layer 40, the multi-layer structure 100 does not need to be grooved and inlaid on the product surface, so that the production cost is lower and the efficiency is higher; it does not need two substrates as carriers, so that the final multi-layer structure 100 is lighter and thinner in design; three-dimensional printing such as electroforming, electroplating plastic sheet cutting, injection molding or three-dimensional printing is adopted. The forming technology is used, and all real materials such as metal, solid wood, cloth or leather are used to make the three-dimensional logo pattern, so that the prefabricated three-dimensional logo pattern is more three-dimensional, realistic and thinner; after completing the preparation of the protective transparent layer 40 and the prefabricated three-dimensional logo pattern, the construction of decorative processes such as color printing, texture transfer, silk screen printing, laser engraving, and the production of molding processes such as lamination, high pressure, hot pressing, injection molding, etc. can be continued, that is, it has the characteristics of continuous processing under the same positioning method, thereby ensuring the precise alignment of the prefabricated three-dimensional logo pattern with the subsequent decorative pattern or product appearance.

[0152] Further, such as Figure 6As shown, when the first carrier layer 10 is metal or ceramic, the difference between the multilayer structure 100 made by the preparation method of the fourth embodiment and the multilayer structure 100 made by the first embodiment, the second embodiment or the third embodiment is that the multilayer structure 100 also includes a first bonding layer 50, and the first bonding layer 50 is arranged between the inner decoration layer 20 and the first carrier layer 10. The material of the first bonding layer 50 is OCA (optically clear adhesive) transparent optical glue, UV glue, hot melt glue or epoxy resin and other colloids, which enhances the bonding firmness between the inner decoration layer 20 and the first carrier layer 10. Among them, the OCA optical adhesive film is a base-free double-sided bonding tape made of OCA optical glue, which has the characteristics of colorless transparency, high light transmittance, high bonding strength, etc.

[0153] See also Figure 7 The fifth embodiment of the present invention discloses a method for preparing a multilayer structure having a three-dimensional logo pattern, including:

[0154] S501, providing a prefabricated three-dimensional logo pattern layer;

[0155] S502, providing a first prefabricated release film, and placing the prefabricated three-dimensional logo pattern layer on a preset position of a release surface of the first prefabricated release film;

[0156] S503, providing a second prefabricated release film, coating a layer of transparent adhesive on the prefabricated three-dimensional logo pattern layer and the release surface, and covering the release surface of the second prefabricated release film on the transparent adhesive, and rolling and curing to form a protective transparent layer;

[0157] In this embodiment, the description of the above steps 501, 502 and 503 refers to the first embodiment, and will not be further described in this embodiment.

[0158] S504, peeling off the first prefabricated release film to expose the first surface of the protective transparent layer, and preparing a decorative explosion-proof layer on the first surface;

[0159] In this embodiment, the decorative explosion-proof layer can be a decorative plastic sheet pre-coated with OCA transparent optical glue. The first prefabricated release film is peeled off from the protective transparent layer, so that the finally formed multi-layer structure with the prefabricated three-dimensional logo pattern layer is lighter and thinner, and at the same time, the protective transparent layer exposes its first surface, and then the coated surface of the decorative plastic sheet pre-coated with OCA transparent optical glue is adhered to the first surface of the protective transparent layer, and then heated and cured to form a decorative explosion-proof layer. The decorative explosion-proof layer has both decorative effect and explosion-proof effect.

[0160] S505, peeling off the second prefabricated release film to expose the second surface of the protective transparent layer, and preparing a second adhesive layer on the second surface;

[0161] In this embodiment, the second prefabricated release film is peeled off from the protective transparent layer, so that the finally formed multi-layer structure with the prefabricated three-dimensional logo pattern layer is lighter and thinner, and at the same time, the second surface of the protective transparent layer is exposed, and the second adhesive layer is formed by coating OCA transparent optical glue on the second surface and heating and curing it.

[0162] S506: Prepare a second carrier layer on the side of the second adhesive layer away from the second surface to form the multilayer structure having the three-dimensional identification pattern.

[0163] In this embodiment, the material of the second carrier layer is transparent glass, and the transparent glass is attached to a surface of the second adhesive layer away from the second surface to obtain a multi-layer structure with a three-dimensional logo pattern. Users can see the prefabricated three-dimensional logo pattern layer through the transparent glass and the transparent protective layer. In other cases, the second carrier layer can also be made of transparent plastic materials to achieve transparency and carry a load. This embodiment is only an example and not a limitation.

[0164] See also Figure 8 The embodiment of the present invention discloses a multilayer structure 100 having a three-dimensional logo pattern. The multilayer structure 100 having a three-dimensional logo pattern is manufactured by the manufacturing method of the fifth embodiment described above.

[0165] The multilayer structure 100 includes a decorative explosion-proof layer 60, a prefabricated three-dimensional logo pattern layer 30, a protective transparent layer 40, a second adhesive layer 70 and a second carrier layer 80; the prefabricated three-dimensional logo pattern layer 30 is arranged on the decorative explosion-proof layer 60; the protective transparent layer 40 covers the decorative explosion-proof layer 60 and the prefabricated three-dimensional logo pattern layer 30; the second adhesive layer 70 is arranged on the protective transparent layer 40; and the second carrier layer 80 is arranged on the second adhesive layer 70.

[0166] Specifically, the material of the second carrier layer 80 is transparent glass or transparent plastic, and the material of the second adhesive layer 70 is OCA transparent optical glue. The multilayer structure 100 does not need to be grooved and inlaid on the surface of the product, so that the production cost is lower and the efficiency is higher; it does not need two substrates as carriers, so that the final multilayer structure 100 is more lightweight and thinner; it adopts three-dimensional forming technologies such as electroforming, electroplating plastic sheet cutting, injection molding spraying or three-dimensional printing, and adopts all real materials such as metal, solid wood, cloth or leather to make a three-dimensional logo pattern, so that the prefabricated three-dimensional logo pattern is more three-dimensional, realistic and thinner; after the preparation of the protective transparent layer 40 and the prefabricated three-dimensional logo pattern is completed, it can continue to carry out the construction of decorative processes such as color printing, texture transfer, silk screen, laser engraving, and the production of molding processes such as lamination, high pressure, hot pressing, injection molding, that is, it has the characteristics of continuous processing under the same positioning mode, so as to ensure the precise alignment of the prefabricated three-dimensional logo pattern with the subsequent decorative pattern or product appearance. The protective transparent layer 40 may also be subjected to surface treatment to improve the wear resistance and durability of the multi-layer structure 100 .

[0167] See also Fig. 9 The sixth embodiment of the present invention discloses a method for preparing a multilayer structure having a three-dimensional logo pattern, including:

[0168] S601, providing a prefabricated three-dimensional logo pattern layer;

[0169] In this embodiment, the description of the above step 601 refers to the first embodiment, and will not be further described in this embodiment.

[0170] S602, providing a transparent material layer, and placing the prefabricated three-dimensional logo pattern layer on a preset position of the transparent material layer;

[0171] The transparent material layer is made of transparent material, and the prepared three-dimensional logo pattern layer is placed on the transparent material layer. Specifically, the transparent material layer can also be made of other materials processed by color printing, texture transfer, electroplating, spraying and other decorative processes to carry the prefabricated three-dimensional logo pattern layer.

[0172] S603, providing a second prefabricated release film, coating a layer of transparent adhesive on the transparent material layer, and covering the release surface of the second prefabricated release film on the transparent adhesive, and rolling and curing to form a protective transparent layer;

[0173] Specifically, after step 603, the side of the transparent material layer away from the three-dimensional logo pattern layer can also be subjected to decoration processing such as color printing, texture transfer, electroplating, spraying, etc. If the material selected in step 602 has been subjected to decoration processing, it is not necessary to repeat the decoration processing.

[0174] S604 , peeling off the second prefabricated release film to form a multi-layer structure with a three-dimensional logo pattern.

[0175] In this embodiment, the description of the above step 604 refers to the first embodiment, and will not be further described in this embodiment.

[0176] Compared with the first embodiment, step 602 of this embodiment replaces the first prefabricated release film in the first embodiment with a transparent material layer, so that the required graphics can be directly prefabricated and placed in the final multi-layer structure with a three-dimensional logo pattern, thereby reducing the related processes and steps of the first prefabricated release film and simplifying the method steps.

[0177] See also Fig.10 The seventh embodiment of the present invention discloses a method for preparing a multilayer structure having a three-dimensional logo pattern, comprising:

[0178] S701, providing a prefabricated three-dimensional logo pattern layer;

[0179] In this embodiment, the description of the above step 701 refers to the first embodiment, and will not be repeated in this embodiment.

[0180] S702, providing a transparent material layer, and placing the prefabricated three-dimensional logo pattern layer on a preset position of the transparent material layer;

[0181] The transparent material layer is made of transparent material, and the prepared three-dimensional logo pattern layer is placed on the transparent material layer. Specifically, the transparent material layer can also be made of other materials processed by color printing, texture transfer, electroplating, spraying and other decorative processes to carry the prefabricated three-dimensional logo pattern layer.

[0182] S703, providing a second prefabricated release film, coating a layer of transparent adhesive on the transparent material layer, and covering the release surface of the second prefabricated release film on the transparent adhesive, and rolling and curing to form a protective transparent layer;

[0183] Specifically, after step 603, the side of the transparent material layer away from the three-dimensional logo pattern layer can also be subjected to decoration processing such as color printing, texture transfer, electroplating, spraying, etc. If the material selected in step 602 has been subjected to decoration processing, it is not necessary to repeat the decoration processing.

[0184] S704, peeling off the second prefabricated release film to expose the second surface of the protective transparent layer, and preparing a second adhesive layer on the second surface;

[0185] In this embodiment, the description of step 704 refers to step 505 in the fifth embodiment, and will not be repeated in this embodiment.

[0186] S705 , preparing a second carrier layer on a side of the second adhesive layer away from the second surface to form a multilayer structure having a three-dimensional logo pattern.

[0187] In this embodiment, the description of step 705 refers to step 506 in the fifth embodiment. Specifically, the second carrier layer is made of a transparent material, such as transparent glass, plastic, etc., to achieve a decorative effect of providing a three-dimensional logo or pattern for the glass product.

[0188] Similar to the sixth embodiment, compared with the first embodiment and the fifth embodiment, the present embodiment replaces the first prefabricated release film with a transparent material layer, and the required graphics can be directly prefabricated and placed in the final multi-layer structure with a three-dimensional logo pattern, thereby reducing the related processes and steps of the first prefabricated release film and simplifying the method steps.

[0189] See also Fig.11 The eighth embodiment of the present invention discloses a method for preparing a multilayer structure having a three-dimensional logo pattern, including:

[0190] S801, providing a prefabricated three-dimensional logo pattern layer;

[0191] In this embodiment, the description of the above step 801 refers to the first embodiment, and will not be repeated in this embodiment.

[0192] S802, providing a second prefabricated release film, and placing the prefabricated three-dimensional logo pattern layer on a preset position of the second prefabricated release film;

[0193] S803, providing a transparent material layer, coating a layer of transparent adhesive on the second prefabricated release film, and covering the transparent material layer on the transparent adhesive, and rolling and curing to form a protective transparent layer;

[0194] Compared with the sixth embodiment, the three-dimensional logo pattern layer in this embodiment is changed from the transparent material layer to the second prefabricated release film, and the position is changed. Correspondingly, the transparent adhesive is also changed to the side of the transparent material layer. The rest of the aspects are basically the same as the sixth embodiment. Changing the position can more flexibly select a suitable preparation method, and is not limited to fixing the three-dimensional logo pattern layer at a certain level.

[0195] S804 , peeling off the second prefabricated release film to form the multi-layer structure having the three-dimensional logo pattern.

[0196] After peeling off the second prefabricated release film, the side away from the transparent material layer is subjected to one or more superpositions of a silk screen printing process, a UV transfer optical texture process, an electroplating process, a color printing process, a four-color color printing process, a texture rubbing process, a pad printing process, a water transfer process, a bonding process, and a hot stamping process to process an inner decorative surface to form a multi-layer structure with a three-dimensional logo pattern. After processing the inner decorative surface, the inner decorative surface can also be used to bond the second carrier. Similar to the fifth embodiment, the material of the second carrier can be transparent glass or transparent plastic, and the material used for bonding can be selected from OCA transparent optical adhesive.

[0197] The multilayer structure obtained by the eighth embodiment includes an outer decoration layer, a transparent material layer, a protective transparent layer, an inner decoration layer, a second adhesive layer and a second carrier layer in sequence, and the transparent material layer is arranged on the prefabricated three-dimensional logo pattern layer, and the protective transparent layer covers the inner decoration layer and the prefabricated three-dimensional logo layer. The second carrier layer can be made of transparent glass, transparent plastic and other materials, and the second adhesive layer can be made of OCA transparent optical glue. The overall structure is basically transparent so that the internal three-dimensional logo pattern can be observed from the outside.

[0198] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may also be combined, the steps may be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Although the present invention has been described in detail with reference to the above embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the above embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for preparing a multilayer structure having a three-dimensional logo pattern, characterized in that: The preparation method comprises: Providing a prefabricated three-dimensional logo pattern layer; Providing a first prefabricated release film, and placing the prefabricated three-dimensional logo pattern layer on a preset position of a release surface of the first prefabricated release film; Providing a second prefabricated release film, coating a layer of transparent adhesive on the prefabricated three-dimensional logo pattern layer and the release surface, and covering the release surface of the second prefabricated release film on the transparent adhesive, and rolling and curing to form a protective transparent layer; Peeling off the first prefabricated release film to expose the first surface of the protective transparent layer, and preparing an inner decorative layer on the first surface to obtain a release decorative film; A first carrier layer is prepared on a side of the inner decoration layer of the release decoration film away from the first surface, and the second prefabricated release film is peeled off to form the multilayer structure with the three-dimensional logo pattern.

2. The preparation method according to claim 1, characterized in that: The step of providing a prefabricated three-dimensional logo pattern layer comprises: A substrate is provided, and according to a preset format of the three-dimensional logo pattern, the three-dimensional logo pattern is prepared on the substrate through a processing technology to form the three-dimensional logo pattern layer, and the processing technology includes one or more of electroforming, electroplating film cutting, injection molding, spraying and three-dimensional printing.

3. The preparation method according to claim 1, characterized in that: The step of preparing the interior decoration layer on the first surface comprises: The interior decoration layer is prepared by superimposing one or more processes selected from the group consisting of silk screen printing, UV transfer optical texture technology, electroplating technology, color printing technology, four-color color printing technology, texture rubbing technology, pad printing technology, water transfer technology, lamination technology, and hot stamping technology on the first surface.

4. The preparation method according to claim 1, characterized in that: The step of preparing the first carrier layer on the side of the inner decoration layer away from the first surface and peeling off the second prefabricated release film to form the multilayer structure with the three-dimensional logo pattern is formed in two steps, including: Mixing one or more of glass fiber, carbon fiber and Kevlar with liquid epoxy resin to form a prepreg of the first carrier layer, wherein the prepreg comprises a thermoplastic material or a thermosetting material; The inner decoration layer and the prepreg are laminated and placed together in a first mold, and the first mold is heated and pressurized through a lamination process to cure the prepreg and form a bond with the inner decoration layer, and the second prefabricated release film is peeled off to form the multilayer structure with the three-dimensional logo pattern.

5. The preparation method according to claim 1, characterized in that: The step of preparing a first carrier layer on a side of the inner decoration layer of the release decoration film away from the first surface, and peeling off the second prefabricated release film, and forming the multilayer structure with a three-dimensional logo pattern in two steps, including: Punching or hot pressing the release decorative film; The molded release decorative film is placed in the injection mold, and the injection material and the inner decorative layer are injection molded by an in-mold insert injection molding process. After the injection molding is completed, the second prefabricated release film is peeled off to form the multi-layer structure with the three-dimensional logo pattern.

6. The preparation method according to claim 1, characterized in that: The step of preparing the first carrier layer on the side of the inner decoration layer away from the first surface and peeling off the second prefabricated release film to form the multilayer structure with the three-dimensional logo pattern is formed in two steps, including: preparing a first adhesive layer on a side of the interior decoration layer away from the first surface; Put metal or ceramic in the second mold, adhere the side of the first adhesive layer away from the inner decoration layer to the metal or ceramic, and perform welding and curing to obtain the first carrier layer, and peel off the second prefabricated release film to form the multilayer structure with the three-dimensional logo pattern.

7. The preparation method according to claim 1, characterized in that: After peeling off the second prefabricated release film, the method further comprises: The surface of the transparent protective layer exposed by peeling off the second prefabricated release film is subjected to coloring, grinding, coating, rubbing or curtain coating to obtain an outer decorative layer.

8. A method for preparing a multilayer structure having a three-dimensional logo pattern, characterized in that: The preparation method comprises: Providing a prefabricated three-dimensional logo pattern layer; Providing a transparent material layer, and placing the prefabricated three-dimensional logo pattern layer on a preset position of the transparent material layer; Providing a second prefabricated release film, coating a layer of transparent adhesive on the transparent material layer, and covering the release surface of the second prefabricated release film on the transparent adhesive, and rolling and curing to form a protective transparent layer; The second prefabricated release film is peeled off to form the multi-layer structure with the three-dimensional logo pattern.

9. The preparation method according to claim 8, characterized in that: The step of providing a transparent material layer and placing the prefabricated three-dimensional logo pattern layer on a preset position of the transparent material layer also includes: The other side of the transparent material layer away from the surface where the prefabricated three-dimensional logo pattern layer is placed is made by superimposing one or more of the following processes: silk screen printing, UV transfer optical texture technology, electroplating technology, color printing technology, four-color color printing technology, texture rubbing technology, pad printing technology, water transfer technology, lamination technology, and hot stamping technology.

10. The preparation method according to claim 8, characterized in that: The method further comprises: providing a second prefabricated release film, coating a layer of transparent adhesive on the transparent material layer, and covering the release surface of the second prefabricated release film on the transparent adhesive, and rolling and curing to form a protective transparent layer. The side of the transparent material layer away from the prefabricated three-dimensional logo pattern layer is processed by silk screen printing, UV transfer optical texture technology, electroplating technology, color printing technology, four-color color printing technology, texture rubbing technology, pad printing technology, water transfer technology, lamination technology, and hot stamping technology.

11. A method for preparing a multilayer structure having a three-dimensional logo pattern, characterized in that: The preparation method comprises: Providing a prefabricated three-dimensional logo pattern layer; Providing a first prefabricated release film, and placing the prefabricated three-dimensional logo pattern layer on a preset position of a release surface of the first prefabricated release film; Providing a second prefabricated release film, coating a layer of transparent adhesive on the prefabricated three-dimensional logo pattern layer and the release surface, and covering the release surface of the second prefabricated release film on the transparent adhesive, and rolling and curing to form a protective transparent layer; Peeling off the first prefabricated release film to expose the first surface of the protective transparent layer, and preparing a decorative explosion-proof layer on the first surface; Peeling off the second prefabricated release film to expose the second surface of the protective transparent layer, and preparing a second adhesive layer on the second surface; A second carrier layer is prepared on a side of the second adhesive layer away from the second surface to form the multilayer structure having the three-dimensional logo pattern.

12. The preparation method according to claim 11, characterized in that: The second carrier layer is made of transparent glass or transparent plastic.

13. A method for preparing a multilayer structure having a three-dimensional logo pattern, characterized in that: The preparation method comprises: Providing a prefabricated three-dimensional logo pattern layer; Providing a transparent material layer, and placing the prefabricated three-dimensional logo pattern layer on a preset position of the transparent material layer; Providing a second prefabricated release film, coating a layer of transparent adhesive on the transparent material layer, and covering the release surface of the second prefabricated release film on the transparent adhesive, and rolling and curing to form a protective transparent layer; Peeling off the second prefabricated release film to expose the second surface of the protective transparent layer, and preparing a second adhesive layer on the second surface; A second carrier layer is prepared on a side of the second adhesive layer away from the second surface to form the multilayer structure having the three-dimensional logo pattern.

14. The preparation method according to claim 13, characterized in that: The step of providing a transparent material layer and placing the prefabricated three-dimensional logo pattern layer on a preset position of the transparent material layer also includes: The transparent material layer is processed by silk screen printing, UV transfer optical texture technology, electroplating technology, color printing technology, four-color color printing technology, texture rubbing technology, pad printing technology, water transfer technology, laminating technology, and hot stamping technology.

15. The preparation method according to claim 13, characterized in that: The method further comprises: providing a second prefabricated release film, coating a layer of transparent adhesive on the transparent material layer, and covering the release surface of the second prefabricated release film on the transparent adhesive, and rolling and curing to form a protective transparent layer. The side of the transparent material layer away from the prefabricated three-dimensional logo pattern layer is processed by silk screen printing, UV transfer optical texture technology, electroplating technology, color printing technology, four-color color printing technology, texture rubbing technology, pad printing technology, water transfer technology, lamination technology, and hot stamping technology.

16. A multi-layer structure with a three-dimensional logo pattern, characterized in that: The multilayer structure is made by the preparation method according to any one of claims 1 to 10, and the multilayer structure comprises: a first carrier layer; an inner decoration layer, wherein the inner decoration layer is disposed on the first carrier layer; A prefabricated three-dimensional logo pattern layer, wherein the prefabricated three-dimensional logo pattern layer is arranged on the inner decoration layer; A protective transparent layer is covered on the prefabricated three-dimensional logo pattern layer and the decorative layer.

17. The multilayer structure according to claim 16, characterized in that The multi-layer structure further includes a first adhesive layer disposed between the inner decoration layer and the first carrier layer.

18. A multi-layer structure with a three-dimensional logo pattern, characterized in that: The multilayer structure is made by the preparation method according to any one of claims 11 to 15, and the multilayer structure comprises: Decorative explosion-proof layer; A prefabricated three-dimensional logo pattern layer, wherein the prefabricated three-dimensional logo pattern layer is arranged on the decorative explosion-proof layer; A protective transparent layer, the protective transparent layer covering the decorative explosion-proof layer and the prefabricated three-dimensional logo pattern layer; a second adhesive layer, the second adhesive layer being disposed on the protective transparent layer; A second carrier layer is disposed on the protective transparent layer.

19. A method for preparing a multilayer structure having a three-dimensional logo pattern, characterized in that: The preparation method comprises: Providing a prefabricated three-dimensional logo pattern layer; Providing a second prefabricated release film, and placing the prefabricated three-dimensional logo pattern layer on a preset position of the second prefabricated release film; Providing a transparent material layer, coating a layer of transparent adhesive on the second prefabricated release film, and covering the transparent material layer on the transparent adhesive, and rolling and curing to form a protective transparent layer; The second prefabricated release film is peeled off to form the multi-layer structure with the three-dimensional logo pattern.

20. The preparation method according to claim 19, characterized in that: After peeling off the second prefabricated release film, the method further comprises: After peeling off the second prefabricated release film, one or more processes are performed on the side away from the transparent material layer, such as silk screen printing, UV transfer optical texture process, electroplating process, color printing process, four-color color printing process, texture rubbing process, pad printing process, water transfer process, lamination process, and hot stamping process, to form the multi-layer structure with the three-dimensional logo pattern.

21. The preparation method according to claim 20, characterized in that: After the second prefabricated release film is peeled off, the side away from the transparent material layer is subjected to one or more superimposed processes of silk screen printing, UV transfer optical texture process, electroplating process, color printing process, four-color color printing process, texture rubbing process, pad printing process, water transfer process, laminating process, hot stamping process, etc. to process the inner decorative surface, and further includes: A second carrier is provided, wherein the second carrier is bonded to the inner decorative surface.

22. The preparation method according to claim 19, characterized in that: The method further comprises: providing a transparent material layer, coating a layer of transparent adhesive on the second prefabricated release film, covering the transparent material layer on the transparent adhesive, and rolling and curing to form a protective transparent layer; The side of the transparent material layer away from the second prefabricated release film is prefabricated with an outer decorative layer with an optical texture through a transfer process.

23. A multi-layer structure with a three-dimensional logo pattern, characterized in that: The multilayer structure is made by the preparation method according to any one of claims 19 to 22, and the multilayer structure comprises: External decorative layer; A transparent material layer, the outer decorative layer is arranged on the transparent material layer; A prefabricated three-dimensional logo pattern layer, wherein the prefabricated three-dimensional logo pattern layer is arranged on the transparent material layer; A protective transparent layer, the protective transparent layer covering the inner decoration layer and the prefabricated three-dimensional logo pattern layer; An inner decoration layer, the inner decoration layer is arranged on the protective transparent layer; a second adhesive layer, the second adhesive layer being disposed on the inner decoration layer; A second carrier layer, wherein the second adhesive layer is arranged on the second carrier layer.

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