CN213564862U - Portable electronic product rear cover - Google Patents
Portable electronic product rear cover Download PDFInfo
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- CN213564862U CN213564862U CN202022171663.3U CN202022171663U CN213564862U CN 213564862 U CN213564862 U CN 213564862U CN 202022171663 U CN202022171663 U CN 202022171663U CN 213564862 U CN213564862 U CN 213564862U
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Abstract
The utility model provides a lid behind portable electronic product, is including range upon range of PET diaphragm part and the fibre reinforced composite part that sets up together, PET diaphragm part is including from top to bottom range upon range of PET membrane, offset printing layer, rendition layer, PVD layer and the printing ink layer that sets up in proper order, fibre reinforced composite part sets up printing ink layer below. This lid behind portable electronic product uses fibre reinforced composite as the substrate, covers the structure with the back that PET diaphragm part complex obtained, can exert fibre reinforced composite's high strength advantage on the one hand, and on the other hand can realize the texture better, dazzle various surface decoration effect through the characteristics of PET diaphragm part, has fine comprehensive properties.
Description
Technical Field
The utility model relates to a lid behind portable electronic product.
Background
With the popularization of the 5G communication technology, a common metal shell is prone to generating signal interference on WIFI, NFC and LIFI, and a rear cover of a 3D structure made of non-metal materials such as glass or plastic does not interfere with signals on one hand, and on the other hand, the attractiveness and hand feeling of a mobile phone can be greatly improved through numerous CMF means, so that the current development trend is that the metal shell is gradually changed into the glass or plastic material through the rear cover material of the mobile phone.
At present, the non-metal solution of the mobile phone back shell mainly comprises three types of materials, wherein the first type of the non-metal solution is glass, and the glass has the greatest advantages of mature process, abundant productivity and low cost and is also the non-metal material with the fastest permeability improvement at present. However, the glass material has inherent defects and is easy to scratch even if only dust or small sand grains are formed. Meanwhile, the mobile phone with the glass cover plate is easy to slide when placed on the inclined plane due to small friction force. The second type is ceramic, the core advantages of which are higher hardness, wear resistance, warm and moist feeling like jade and beautiful and exquisite appearance, which are very ideal materials for mobile phone shells. However, one of the important problems faced by ceramics is the difficulty of processing, resulting in high cost and insufficient productivity. In addition, the brittleness of the ceramic needs to be greatly improved. The third kind of material is plastic, and the plastic material is various on the one hand, can meet various requirements, and on the other hand, the plastic process is mature, the productivity is abundant, and the cost is the lowest, so in the 5G communication era, the plastic material is widely adopted, and at present, mainly two kinds of materials are used, one kind is a PC/PMMA composite board, and the other kind is extrusion injection molding of the modified PC material.
At present, the widely adopted PC/PMMA composite board can realize rich surface decoration effect through offset printing, UV transfer printing, PVD, silk screen printing or spraying and other process means due to the optical transparency characteristic (the light transmittance is more than 85%), but the thinnest thickness of an extruded injection product is 0.6mm due to the plastic strength, particularly the lowest thickness of the low rigidity reason, the currently used fiber reinforced composite material cannot realize the optical transparency (the light transmittance is more than 85%), the decoration scheme is limited, the surface decoration can be realized only through spraying and other means, and the effects of texture, color dazzling and the like cannot be realized.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at overcomes prior art not enough, provides a lid behind portable electronic product.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a lid behind portable electronic product, is including range upon range of PET diaphragm part and the fibre reinforced composite part that sets up together, PET diaphragm part is including from top to bottom range upon range of PET membrane, offset printing layer, rendition layer, PVD layer and the printing ink layer that sets up in proper order, fibre reinforced composite part sets up printing ink layer below.
Further:
the fiber reinforced composite material part is a glass fiber plate, a carbon fiber plate or an aramid fiber reinforced composite material plate.
The thickness range of the fiber reinforced composite material part is 0.1-0.5 mm.
The thickness range of the PET film is 0.0125-0.25 mm.
The offset printing layer is a pure-color or gradient-color offset printing layer and is 2-12 mu m thick.
The transfer printing layer is a UV transfer printing glue layer.
The PVD layer is an optical coating on the transfer printing layer, the target of the optical coating is silicon, zirconium, niobium or titanium, and the thickness of the optical coating is 40-600 nm.
The ink layer is screen printing ink with the thickness of 15-60 mu m.
The PET film part and the fiber reinforced composite material part are bonded through the UV glue layer.
Further comprising a hardbanding coating disposed on the PET film.
The beneficial effects of the utility model are that:
the utility model discloses a lid uses the fibre reinforced composite material as the substrate behind the portable electronic product, and the back lid structure that obtains by the compound PET diaphragm part of the range upon range of component of above-mentioned structure, high strength, the high rigidity advantage that can exert fibre reinforced composite material on the one hand, on the other hand can realize the texture better through the characteristics of PET diaphragm part, dazzle various surface decoration effect, the comprehensive properties of product is showing and is promoting.
Drawings
Fig. 1 is a schematic diagram of a basic structure of a rear cover of a portable electronic product according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a PET film portion of a rear cover of a portable electronic product according to a preferred embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a rear cover of a portable electronic product according to a preferred embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a rear cover of a portable electronic product according to another preferred embodiment of the present invention.
Detailed Description
The embodiments of the present invention will be described in detail below. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the invention or its application.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element. In addition, the connection may be for either a fixed or coupled or communicating function.
It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the embodiments of the present invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1 to 3, in an embodiment, a portable electronic product rear cover includes a PET film portion and a fiber reinforced composite portion stacked together, where the PET film portion includes a PET film, an offset printing layer, a transfer printing layer, a PVD layer, and an ink layer stacked in sequence from top to bottom, and the fiber reinforced composite portion is disposed under the ink layer.
The electronic product rear cover of the embodiment may be (but is not limited to) a rear cover of an electronic product such as a smart phone.
In a preferred embodiment, as shown in fig. 3, the rear cover of the portable electronic product further comprises a UV glue layer disposed between the PET film portion and the fiber reinforced composite material portion, and the ink layer of the PET film portion and the fiber reinforced composite material portion are bonded together by the UV glue layer. In a more preferred embodiment, the UV glue layer satisfies the following parameter conditions:
the peel strength is more than 16N/cm;
the viscosity range is 2000-8000 cP;
the hardness ranges after curing were: ShoreD: 10 to 50
A coefficient of thermal expansion CTE of 4.0 to 8.0 x 10-5cm/cmK
Curing energy: 300 to 1200mJ/cm2
The UV glue layer meeting the parameter conditions is selected, so that the product performance and the process manufacturing requirements can be met, and the best bonding effect of the ink layer and the fiber reinforced composite material part can be realized.
In a preferred embodiment, the fiber-reinforced composite part may be a glass fiber board, a carbon fiber board or an aramid fiber-reinforced composite board.
In a more preferred embodiment, the thickness of the fiber-reinforced composite material part is in the range of 0.1 to 0.5 mm.
In a preferred embodiment, the thickness of the PET film ranges from 0.0125 mm to 0.25 mm.
In a preferred embodiment, the offset printing layer is a pure color or gradient color offset printing layer and has a thickness of 2-12 μm.
In a preferred embodiment, the transfer layer is a UV transfer glue layer. In a more preferred embodiment, the UV transfer glue layer satisfies the following parameter conditions:
viscosity: 300-1000 cP;
tensile strength after curing: 20MPa to 50 MPa;
elongation at break: more than 30 percent.
The UV transfer printing glue layer meeting the parameter conditions is selected, so that the structure and process requirements are well met, and the UV transfer printing effect is good.
In a preferred embodiment, the PVD layer is an optical coating on the transfer layer, the target of the optical coating is silicon, zirconium, niobium or titanium, and the thickness of the optical coating is 40 to 600 nm.
In a preferred embodiment, the ink layer is screen printing ink with the thickness of 15-60 mu m.
Referring to fig. 4, in a more preferred embodiment, the difference from the embodiment shown in fig. 3 is that the portable electronic product rear cover further includes a hard coating layer disposed on the PET film.
The portable electronic product rear cover and the manufacturing process thereof according to the embodiments are further described below with reference to the accompanying drawings.
The material adopted by the rear cover of the portable electronic product comprises two parts: one part is a fiber reinforced composite material, preferably a glass fiber plate, a carbon fiber plate or an aramid fiber reinforced composite material, and the thickness range is 0.1-0.5 mm; the other part is a PET film part, wherein an optical grade PET film is adopted, the thickness range is 0.0125-0.25 mm, and the PET film is used in a coiled material mode during manufacturing. In order to form an offset layer, a transfer layer, a PVD layer, an ink layer, and the like on a PET film, the following processes are respectively performed on the PET film in a roll-to-roll manner:
1) offset printing: forming an offset printing layer, and coloring the PET surface, wherein the offset printing layer can be pure color or gradient color, and the thickness of the offset printing layer is generally 2-12 mu m;
2) transfer printing: forming a UV transfer printing glue layer on the offset printing layer through a UV transfer printing process to realize optical texture; the preferred transfer glue layer has the following characteristics:
viscosity: 300-1000 cP;
tensile strength after curing: 20MPa to 50 MPa;
elongation at break: over 30 percent
3) PVD optical coating: performing optical coating on the transfer printing layer, wherein the target material is silicon, zirconium, niobium, titanium and the like, and a PVD layer is formed, and the thickness of the PVD layer is 40-600 nm;
4) printing ink by silk screen: printing base color ink on the surface of the PVD coating by silk screen to form an ink layer which is usually black, white and gray, can be a single layer or a combined layer, and has the thickness of 15-60 mu m;
5) coating UV glue, and pasting the ink layer of the PET membrane part and the fiber reinforced composite material together.
The UV glue of the preferred embodiment meets the following parameter conditions:
the ink layer and the fiber reinforced composite material can be well bonded, and the peel strength is more than 16N/cm;
the viscosity range is 2000-8000 cP;
the hardness ranges after curing were: ShoreD: 10 to 50;
coefficient of thermal expansionA CTE of 4.0 to 8.0 x 10-5cm/cmK
Curing energy: 300 to 1200mJ/cm2。
After the fiber reinforced composite material part is attached to the PET membrane part, the following processes are further carried out:
1) forming under high pressure to form the required curved shape;
2) flow coating and hardening: spraying and coating a hardened coating on the surface of the PET, and curing to form a surface hardened coating;
3) and (4) CNC machining, wherein structures such as the appearance of the product, a groove hole at the position of the middle frame, hole positions and the like are machined through CNC.
The structure of the resulting rear cover product is shown in fig. 4.
The utility model discloses lid uses the fibre reinforced composite material as the substrate behind the portable electronic product, covers the structure with the back that the PET diaphragm part is compound to be obtained, can exert fibre reinforced composite's high strength, high rigidity advantage on the one hand, and on the other hand can realize the texture better through the characteristics of PET diaphragm part, dazzle various surface decoration effect, and the product has fine comprehensive properties.
The background section of the present invention may contain background information related to the problems or the environment of the present invention and is not necessarily descriptive of the prior art. Accordingly, the inclusion in the background section is not an admission of prior art by the applicant.
The foregoing is a more detailed description of the present invention, taken in conjunction with the specific/preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. For those skilled in the art to which the invention pertains, a plurality of alternatives or modifications can be made to the described embodiments without departing from the concept of the invention, and these alternatives or modifications should be considered as belonging to the protection scope of the invention. In the description herein, references to the description of the term "one embodiment," "some embodiments," "preferred embodiments," "an example," "a specific example," or "some examples" or the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. Although the embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the scope of the claims.
Claims (10)
1. The utility model provides a lid behind portable electronic product, its characterized in that, is including range upon range of PET diaphragm part and the fibre reinforced composite part that sets up together, PET diaphragm part is including from top to bottom range upon range of PET membrane, offset printing layer, rendition layer, PVD layer and the printing ink layer that sets up in proper order, fibre reinforced composite part sets up printing ink layer below.
2. The rear cover of a portable electronic product as claimed in claim 1, wherein the fiber reinforced composite material portion is a glass fiber plate, a carbon fiber plate or an aramid fiber reinforced composite material plate.
3. The rear cover of a portable electronic product according to claim 2, wherein the thickness of the fiber reinforced composite material part is in a range of 0.1 to 0.5 mm.
4. The rear cover of portable electronic product according to any of claims 1 to 3, wherein the thickness of the PET film is in the range of 0.0125 mm to 0.25 mm.
5. The rear cover of a portable electronic product according to any one of claims 1 to 3, wherein the offset printing layer is a pure color or gradient color offset printing layer and has a thickness of 2 to 12 μm.
6. The rear cover of a portable electronic product according to any one of claims 1 to 3, wherein the transfer layer is a UV transfer glue layer.
7. The portable electronic product rear cover according to any one of claims 1 to 3, wherein the PVD layer is an optical coating on the transfer layer, a target of the optical coating is silicon, zirconium, niobium or titanium, and a thickness of the optical coating is 40 to 600 nm.
8. The rear cover of a portable electronic product as claimed in any one of claims 1 to 3, wherein the ink layer is a silk-screen ink with a thickness of 15-60 μm.
9. The back cover of a portable electronic product as claimed in any one of claims 1 to 3, further comprising a UV glue layer disposed between the PET film portion and the fiber-reinforced composite material portion for bonding the PET film portion and the fiber-reinforced composite material portion.
10. The portable electronic product rear cover according to any one of claims 1 to 3, further comprising a hard coating layer disposed on the PET film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022171663.3U CN213564862U (en) | 2020-09-28 | 2020-09-28 | Portable electronic product rear cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022171663.3U CN213564862U (en) | 2020-09-28 | 2020-09-28 | Portable electronic product rear cover |
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| Publication Number | Publication Date |
|---|---|
| CN213564862U true CN213564862U (en) | 2021-06-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022171663.3U Active CN213564862U (en) | 2020-09-28 | 2020-09-28 | Portable electronic product rear cover |
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| Country | Link |
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| CN (1) | CN213564862U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114311885A (en) * | 2021-11-25 | 2022-04-12 | 昇印光电（昆山）股份有限公司 | Electronic equipment cover plate |
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2020
- 2020-09-28 CN CN202022171663.3U patent/CN213564862U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114311885A (en) * | 2021-11-25 | 2022-04-12 | 昇印光电（昆山）股份有限公司 | Electronic equipment cover plate |
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