A silica gel transfer back cover and a mobile phone

Abstract

This utility model relates to the field of mobile phone technology, and in particular to a silicone-printed back cover and a mobile phone. The silicone-printed back cover includes a base layer; the base layer includes at least one set of glass fiber layers, a thermally conductive layer, and an aramid layer; the thermally conductive layer is disposed between the glass fiber layers and the aramid layer, and is cured together with the glass fiber layers and the aramid layer; a base layer is disposed on the base layer; a base color layer is disposed on the base layer; a color-changing layer is disposed on the base color layer; at least one silicone-printed layer is disposed on the color-changing layer; an encapsulation layer is disposed on the silicone-printed layer; and a scratch-resistant layer is disposed on the encapsulation layer. The color-changing layer can reflect a dazzling effect; the silicone-printed layer prints delicate textured patterns on the color-changing layer; the encapsulation layer can encapsulate and level the surface to facilitate the subsequent application of the scratch-resistant layer. The aramid layer has good toughness, which can enhance the thermal conductivity of the base layer and prevent it from cracking. The thermally conductive layer can enhance the thermal conductivity between the glass fiber layers, improving the heat conduction and dissipation capabilities of the back cover.

Description

Technical Field

[0001] This utility model relates to the field of mobile phone technology, and in particular to a silicone printing back cover and a mobile phone. Background Technology

[0002] The back cover is one of the accessories for a mobile phone. It occupies a large portion of the phone's surface area, and a significant portion of the phone's heat is dissipated through it. Therefore, the heat dissipation capacity of the back cover directly affects the phone's performance. However, some mobile phone back covers on the market are made primarily of epoxy fiberglass. Ordinary epoxy fiberglass has poor thermal conductivity and is brittle, making it prone to cracking.

[0003] For example, Chinese patent application number CN202322529209.4 discloses a 3.5D printed back cover, specifically stating that "the base layer is a component made of glass fiber epoxy resin." This type of back cover uses epoxy glass fiber material as the base layer. Epoxy glass fiber material has poor thermal conductivity and is brittle, making it prone to cracking. Utility Model Content

[0004] In view of this, the present invention addresses the deficiencies of the existing technology and its main purpose is to provide a silicone printing back cover that not only has good thermal conductivity but also good toughness and is not easy to crack, thereby overcoming the shortcomings of the existing technology.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: This application provides a silicone printing back cover, including a base layer; the base layer includes at least one set of glass fiber layer, thermally conductive layer, and aramid layer; the thermally conductive layer is disposed between the glass fiber layer and the aramid layer, and is cured together with the glass fiber layer and the aramid layer; a base layer is disposed on the base layer; a base color layer is disposed on the base layer; a color layer is disposed on the base color layer; at least one silicone printing layer is disposed on the color layer; an encapsulation layer is disposed on the silicone printing layer; and a scratch-resistant layer is disposed on the encapsulation layer.

[0006] Preferably, the glass fiber layer is glass fiber cloth, and a first pore is formed between the yarns of the glass fiber cloth; the aramid layer is aramid cloth, and a second pore is formed between the yarns of the aramid cloth; adjacent first pores and second pores are staggered.

[0007] Preferably, the thermally conductive layer is a metal foil or graphene paper with a densely distributed first pore.

[0008] Preferably, the thermally conductive layer is an epoxy resin embedded with thermally conductive particles; the thermally conductive particles are one of copper particles, aluminum particles, boron nitride particles, alumina particles, graphene particles, and silicon carbide particles.

[0009] Preferably, the underlayer and encapsulation layer are acrylic resin or epoxy resin; the base color layer is acrylic resin or epoxy resin with color; and the silicone printing layer is acrylic resin ink or epoxy resin ink.

[0010] Preferably, the iridescent layer is an acrylic resin or epoxy resin with embedded glitter powder.

[0011] Preferably, the scratch-resistant layer is one of silicon dioxide, titanium dioxide, acrylic resin, and epoxy resin.

[0012] Preferably, the inner surface of the base layer is further covered with graphene-modified foam and graphene paper.

[0013] Preferably, the graphene-modified foam has at least two layers; the density of the graphene-modified foam gradually decreases from the base layer to the direction away from the base layer.

[0014] This application provides a mobile phone, including a silicone imprinted back cover; the silicone imprinted back cover is pasted on the back of the mobile phone's mid-plate, and a screen is pasted on the front of the mobile phone's mid-plate; the mobile phone's mid-plate includes a plate body, and an upper frame, a lower frame, a left frame, and a right frame integrally formed with the plate body; a volume button hole and a power button hole are provided on the right frame; a speaker hole and a microphone hole are provided on the lower frame; a metal heat-conducting sheet is also pasted on the inner side of the base layer, and the metal sheet is inserted into the left frame and the right frame.

[0015] Compared with existing technologies, this invention has significant advantages and beneficial effects. Specifically, as can be seen from the above technical solution, the base layer can be composed of one or more stacked glass fiber layers, thermally conductive layers, and aramid layers. The aramid layer has excellent toughness and can enhance the thermal properties of the base layer after curing, preventing it from cracking. The thermally conductive layer can enhance the thermal conductivity between the glass fiber layers, improving the heat conduction and dissipation capabilities of the back cover.

[0016] The iridescent layer reflects light beautifully, enhancing the back cover's aesthetics. The silicone imprinting layer allows for the printing of textured patterns onto the iridescent layer, and the resulting patterns are also more visually appealing. The encapsulation layer provides a leveling and sealing effect, facilitating the subsequent application of a scratch-resistant layer. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the layered structure of Embodiment 1 of this utility model.

[0018] Figure 2 This is a schematic diagram of the inner side of the back cover according to Embodiment 1 of this utility model.

[0019] Figure 3 This is a schematic diagram of the outer side of the back cover according to Embodiment 1 of this utility model.

[0020] Figure 4 This is a schematic diagram of the glass fiber cloth according to Embodiment 1 of this utility model.

[0021] Figure 5 This is a schematic diagram of the assembly of the back cover and the middle plate in Embodiment 2 of this utility model.

[0022] Explanation of reference numerals in the attached diagram: 1. Back cover; 10. Base layer; 11. Fiberglass layer; 12. Thermal conductive layer; 13. Aramid layer; 14. Undercoat; 15. Base color layer; 16. Iridescent layer; 17. Silicone imprinting layer; 18. Encapsulation layer; 19. Scratch-resistant layer; 20. Left frame; 21. Right frame; 22. Metal sheet; 23. Speaker hole; 24. Microphone hole; 25. Graphene modified foam. Detailed Implementation

[0023] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0024] Example 1 Please refer to Figures 1 to 4 As shown, it illustrates the specific structure of a preferred embodiment of the present invention, which is a silicone printing back cover 1.

[0025] The base layer 10 is made by stacking and hot-pressing a glass fiber layer 11, a thermally conductive layer 12, and an aramid layer 13 into a whole. Under the action of the thermally conductive layer 12 and the aramid layer 13, the base layer 10 has better thermal conductivity, better toughness, and is not easy to break.

[0026] This application provides a silicone printing back cover 1, including a base layer 10; the base layer 10 includes at least one set of glass fiber layer 11, thermally conductive layer 12, and aramid layer 13; the thermally conductive layer 12 is disposed between the glass fiber layer 11 and the aramid layer 13, and is cured together with the glass fiber layer 11 and the aramid layer 13; a base layer 14 is disposed on the base layer 10; a base color layer 15 is disposed on the base layer 14; a color-changing layer 16 is disposed on the base color layer 15; at least one silicone printing layer 17 is disposed on the color-changing layer 16; an encapsulation layer 18 is disposed on the silicone printing layer 17; and a scratch-resistant layer 19 is disposed on the encapsulation layer 18. The base layer 10 can serve a load-bearing function, has elasticity and toughness, and good thermal conductivity. In this embodiment, the base layer 10 has multiple sets of glass fiber layer 11, thermally conductive layer 12, and aramid layer 13. Production Steps: 1. Stack multiple layers of glass fiber 11, then sandwich a thermally conductive layer 12, and then stack an aramid layer 13. Press the layers into the shape of the back cover 1 in a mold, and bake the base layer 10 to cure it. 2. After the base layer 10 has cured, spray a primer 14 onto the base layer 10 and cure it with ultraviolet light. 3. After the primer 14 is semi-dry or cured, spray a base color layer 15 onto the primer 14 and cure it with ultraviolet light. 4. Spray a vibrant layer 16 onto the base color layer 15 and cure it with UV light or by baking. 5. When the vibrant layer 16 is cured or semi-cured, use silicone imprinting technology to place a silicone imprint layer 17 onto the vibrant layer 16, and cure the silicone imprint layer 17 with UV light or by baking. 6. When the silicone imprint layer 17 has cured or partially cured, spray the encapsulation layer 18 onto the silicone imprint layer 17 and cure the encapsulation layer 18 using a UV lamp or baking method. 7. After the encapsulation layer 18 has cured, apply the scratch-resistant layer 19 to the encapsulation layer 18 by spraying or coating. The aramid layer 13 has excellent toughness and, after curing the base layer 10, enhances the thermal conductivity of the base layer 10, preventing it from cracking, and also has excellent puncture resistance. The thermally conductive layer 12 enhances the thermal conductivity between the glass fiber layers 11. With the total layer thickness remaining constant, the thermally conductive layer 12 improves the heat conduction and dissipation capabilities of the back cover 1. The iridescent layer 16 reflects iridescent colors under light, making the back cover 1 more aesthetically pleasing and appealing to buyers. The silicone imprint layer 17 can print textured patterns on the iridescent layer, and the patterns printed using the silicone imprinting method are also more aesthetically pleasing. The encapsulation layer 18 serves to level and seal the surface, facilitating the subsequent application of the scratch-resistant layer 19. The scratch-resistant layer 19 provides excellent scratch protection and safeguards the back cover 1.

[0027] Preferably, the glass fiber layer 11 is a glass fiber cloth, with first pores formed between the yarns of the glass fiber cloth; the aramid layer 13 is an aramid cloth, with second pores formed between the yarns of the aramid cloth; adjacent first and second pores are staggered. The glass fiber cloth includes single-warp glass fiber yarns and double-weft glass fiber yarns; the single-warp glass fiber yarns and two parallel double-weft glass fiber yarns are alternately floated and undulated to form a glass fiber cloth with alternating overlap of single-warp and double-weft yarns. Multiple interlacing points are formed at the points where the single-warp glass fiber yarns and the two parallel double-weft glass fiber yarns alternately float and undulate, and multiple first pores are formed around each interlacing point. The aramid cloth can be woven using the same weaving process as the glass fiber cloth, or it can be woven using other weaving processes. Because the first and second pores are staggered, this type of base layer 10 has better puncture resistance and very good toughness.

[0028] Preferably, the thermally conductive layer 12 is a metal foil or graphene paper densely covered with first holes; it can also be epoxy resin embedded with thermally conductive particles. The thermally conductive particles are one of copper particles, aluminum particles, boron nitride particles, alumina particles, graphene particles, and silicon carbide particles. Both the metal foil and graphene paper have excellent thermal conductivity, which can greatly increase the thermal conductivity of the base layer 10 while keeping the total thickness of the base layer 10 constant, thus improving the heat dissipation performance of the back cover 1. The metal foil or graphene paper has first holes that allow the epoxy resin on the fiberglass cloth to pass through, ensuring a strong bond between the fiberglass layer 11, the thermally conductive layer 12, and the aramid layer 13. The thermally conductive particles have excellent thermal conductivity. The thermally conductive particles are embedded in the epoxy resin. When the thermally conductive layer 12 is cured into a whole with the fiberglass layer 11 and the aramid layer 13, it has excellent thermal conductivity and also makes the base layer 10 more firmly bonded. In particular, this design can utilize the epoxy resin between the fiberglass cloths to embed the thermally conductive particles, resulting in better economic efficiency. Specifically, this can involve mixing thermally conductive particles with epoxy resin and then spraying the mixture onto fiberglass cloth.

[0029] Preferably, the base layer 14 and the encapsulation layer 18 are acrylic resin or epoxy resin; the base color layer 15 is colored acrylic resin or epoxy resin; and the silicone printing layer 17 is acrylic resin ink or epoxy resin ink. Acrylic resin and epoxy resin materials can both be cured using UV lamps, which helps improve production efficiency and accelerate the curing speed. In this embodiment, the thickness of the base layer 10 is between 1-2 mm; the thickness of the base layer 14 is between 10-15 μm; the thickness of the thermally conductive layer 12 is between 15-20 μm; the thickness of the base color layer 15 is between 15-20 μm; the thickness of the iridescent layer 16 is between 30-50 μm; the thickness of the encapsulation layer 18 is between 10-15 μm; and the thickness of the scratch-resistant layer 19 is between 20-30 μm.

[0030] Preferably, the iridescent layer 16 is acrylic resin or epoxy resin embedded with glitter powder. Glitter powder, also called glitter flakes or glitter flakes, is made by electroplating, coating, and precision cutting of PET, PVC, OPP, and aluminum metallic film materials of varying thicknesses with extremely high brightness. The iridescent layer 16 contains glitter powder, so the back cover 1 can sparkle under light, creating an iridescent effect, making the back cover 1 more aesthetically pleasing and helping to attract consumers' attention and increase mobile phone sales. Alternatively, as a preferred design, strips of transparent acrylic resin or epoxy resin can be sprayed onto the silicone imprint layer 17, and then encapsulated by the encapsulation layer 18. After the mobile phone back cover is completely cured, it will form a water ripple-like effect, which is even more beautiful.

[0031] Preferably, the scratch-resistant layer 19 is one of silicon dioxide, titanium dioxide, acrylic resin, and epoxy resin. In this embodiment, when acrylic resin or epoxy resin is used, it can be cured using a UV lamp or baking method. When the scratch-resistant layer 19 is silicon dioxide or titanium dioxide, it can be applied using a coating method.

[0032] Preferably, the inner surface of the base layer 10 is further covered with graphene-modified foam and graphene paper. Graphene-modified foam is a novel material that enhances the performance of traditional foam materials by adding graphene to them. Of course, polyurethane foam or sponge can also be used instead. Graphene-modified foam has excellent thermal conductivity and cushioning properties, protecting the internal components of the phone while also conducting heat. Graphene paper also has excellent thermal conductivity, allowing heat to spread quickly and evenly across the back cover 1, thus improving heat dissipation performance.

[0033] Preferably, the graphene-modified foam 25 has at least two layers; the density of the graphene-modified foam 25 gradually decreases from the base layer 10 towards the direction away from the base layer 10. That is, the density of the graphene-modified foam 25 is lower near the components inside the phone and higher away from the components. This design allows the graphene modification to adapt to various environments. Since the graphene-modified foam 25 has two layers, with a higher density near the base layer 10 and a lower density away from the base layer 10, the thermal conductivity of the graphene-modified foam 25 increases with increasing density. Therefore, the graphene-modified foam 25 possesses both thermal conductivity and cushioning properties, greatly aiding in the heat dissipation of the phone.

[0034] Example 2 Example 2 includes the silicone printing back cover 1 of Example 1. Please refer to [link / reference] for details. Figure 5The illustrated mobile phone includes a silicone-printed back cover 1. The silicone-printed back cover 1 is adhered to the back of the phone's mid-plate, and a screen is adhered to the front of the mid-plate. The mid-plate includes a body and an integrally formed upper frame, lower frame, left frame 20, and right frame 21. The right frame 21 has volume key holes and a power key hole; the lower frame has a speaker hole 23 and a microphone hole 24. A metal heat-conducting sheet 22 is also attached to the inner side of the base layer 10 and inserted into the left frame 20 and right frame 21. The mid-plate can be die-cast or injection molded. The metal heat-conducting sheet can be adhered to the back cover 1 using thermally conductive silicone or thermally conductive adhesive. After the mid-plate is formed, a saw blade can be used to cut an installation seam in the mid-plate, and the end of the metal sheet 22 is inserted into the installation seam on the left frame 20 and right frame 21. This design allows the heat from the back cover 1 to be transferred to the mid-plate through the metal sheet 22, which helps improve the phone's heat dissipation performance.

[0035] In summary, the key design features of this invention are: the aramid layer 13, after curing the base layer 10, enhances the thermal conductivity of the base layer 10, preventing it from cracking; the thermally conductive layer 12 enhances the thermal conductivity between the glass fiber layers 11, improving the heat conduction and dissipation capabilities of the back cover 1; the iridescent layer 16 reflects iridescent colors, making the back cover 1 more aesthetically pleasing; the silicone imprinting layer 17 can print delicate textured patterns on the iridescent layer 16, further enhancing its aesthetic appeal; the encapsulation layer 18 provides leveling and sealing, facilitating the subsequent application of the scratch-resistant layer 19; and the scratch-resistant layer 19 prevents scratches on the back cover 1.

[0036] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A silicone printing back cover, characterized in that: It includes a base layer; the base layer includes at least one set of glass fiber layer, thermally conductive layer, and aramid layer; the thermally conductive layer is disposed between the glass fiber layer and the aramid layer and is cured together with the glass fiber layer and the aramid layer; a base layer is disposed on the base layer; a base color layer is disposed on the base layer; a color layer is disposed on the base color layer; at least one silicone imprint layer is disposed on the color layer; an encapsulation layer is disposed on the silicone imprint layer; and a scratch-resistant layer is disposed on the encapsulation layer.

2. The silicone printing back cover according to claim 1, characterized in that: The glass fiber layer is glass fiber cloth, and a first pore is formed between the yarns of the glass fiber cloth; the aramid layer is aramid cloth, and a second pore is formed between the yarns of the aramid cloth; adjacent first pores and second pores are staggered.

3. A silicone printing back cover according to claim 1 or 2, characterized in that: The thermally conductive layer is a metal foil or graphene paper with a first hole densely distributed.

4. A silicone printing back cover according to claim 1 or 2, characterized in that: The thermally conductive layer is an epoxy resin embedded with thermally conductive particles; the thermally conductive particles are one of copper particles, aluminum particles, boron nitride particles, alumina particles, graphene particles, and silicon carbide particles.

5. The silicone printing back cover according to claim 1, characterized in that: The underlayer and encapsulation layer are made of acrylic resin or epoxy resin; the base color layer is made of colored acrylic resin or epoxy resin; and the silicone printing layer is made of acrylic resin ink or epoxy resin ink.

6. A silicone printing back cover according to claim 1 or 5, characterized in that: The iridescent layer is made of acrylic resin or epoxy resin with embedded glitter powder.

7. The silicone printing back cover according to claim 1, characterized in that: The scratch-resistant layer is one of silicon dioxide, titanium dioxide, acrylic resin, and epoxy resin.

8. The silicone printing back cover according to claim 1, characterized in that: The inner surface of the base layer is also covered with graphene-modified foam and graphene paper.

9. A silicone printing back cover according to claim 8, characterized in that: Graphene-modified foam has at least two layers; the density of graphene-modified foam gradually decreases from the base layer to the direction away from the base layer.

10. A mobile phone, characterized in that, The invention includes a silicone printing back cover according to any one of claims 1-9; the silicone printing back cover is pasted on the back of the middle plate of a mobile phone, and a screen is pasted on the front of the middle plate of the mobile phone; the middle plate of the mobile phone includes a plate body, and an upper frame, a lower frame, a left frame, and a right frame integrally formed with the plate body; a volume button hole and a power button hole are provided on the right frame; a speaker hole and a microphone hole are provided on the lower frame; a metal heat-conducting sheet is also pasted on the inner side of the base layer, and the metal sheet is inserted into the left frame and the right frame.

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