Bulletproof mobile phone rear cover plate and bulletproof mobile phone rear cover

Abstract

The utility model discloses a bulletproof mobile phone rear cover plate and a bulletproof mobile phone rear cover, and belongs to the field of bulletproof material application. The bulletproof mobile phone rear cover plate comprises a bulletproof functional layer, an interface layer and a surface layer which are sequentially arranged, the bulletproof functional layer is formed by hot pressing of multiple layers of high-performance fiber reinforced thermoplastic resin based bulletproof composite materials, and the surface layer is formed by hot pressing of multiple layers of high-performance fiber reinforced thermosetting resin based composite materials. The interface layer is provided with a first fiber layer combined with the bulletproof functional layer and a second fiber layer combined with the surface layer. The bulletproof functional layer has a bulletproof function, the surface layer is used for meeting the appearance treatment requirements of surface paint spraying and the like of the rear cover of the mobile phone, the requirements of wear resistance, scratch resistance and difficulty in fingerprint contamination are met, good hot-press fitting of the bulletproof functional layer and the surface layer is realized through the interface layer, material layering is prevented, and the integrity is improved. The bulletproof mobile phone rear cover is thinner and more durable, and can protect the life of a carrier.

Description

Technical Field

[0001] The utility model relates to the technical field of bulletproof material application, in particular to a bulletproof mobile phone rear cover plate and a bulletproof mobile phone rear cover. Background Art

[0002] Mobile phones have become an indispensable communication tool for modern people. The iteration and update of mobile phones is very rapid, including the improvement of the outer shell of mobile phones. Looking back at the development history of mobile phone back covers, there are plastic materials, metal materials and glass materials, but back covers of different materials have different disadvantages, such as poor texture of plastic, heavy weight of metal, and poor drop resistance and heavy weight of glass. For the current superior Victus glass, as long as there are small grains of sand on the road, the mobile phone will still break if it falls to the ground, and the impact resistance of the glass back cover is poor, and it is difficult to effectively protect the body battery and motherboard from impact.

[0003] It can be seen that the above existing mobile phone back cover shells obviously still have inconveniences and defects, and are in urgent need of further improvement. How to create a new bulletproof mobile phone back cover plate and bulletproof mobile phone back cover that is not only thinner, more wear-resistant, and not easy to be stained with fingerprints, but also has a bulletproof function and meets more functional requirements of mobile phones has become a goal that the current industry urgently needs to improve. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a bulletproof mobile phone rear cover plate, which is not only thinner, more wear-resistant, and not easy to be stained with fingerprints, but also has a bulletproof function, meets more functional requirements of mobile phones, and thus overcomes the shortcomings of existing mobile phone rear cover shells.

[0005] In order to solve the above technical problems, the utility model provides a bulletproof mobile phone back cover, including a bulletproof functional layer, an interface layer and a surface layer, the bulletproof functional layer is formed by hot pressing multiple layers of high-performance fiber-reinforced thermoplastic resin-based bulletproof composite materials, the surface layer is formed by hot pressing multiple layers of high-performance fiber-reinforced thermosetting resin-based composite materials, the interface layer is arranged between the bulletproof functional layer and the surface layer, and the interface layer has a first fiber layer hot-pressed and bonded to the bulletproof functional layer, and a second fiber layer hot-pressed and bonded to the surface layer.

[0006] As a further improvement, the interface layer adopts a fabric structure woven from first fibers and second fibers, the first fibers are main fibers of the first fiber layer, and the second fibers are main fibers of the second fiber layer.

[0007] As a further improvement, the first fibers are the same as the high-performance fibers in the bullet-proof functional layer, and the second fibers are the same as the high-performance fibers in the surface layer.

[0008] As a further improvement, the high-performance fiber in the bulletproof functional layer is made of ultra-high molecular weight polyethylene fiber, aramid fiber, heterocyclic aramid fiber, PBO fiber or PI fiber, and the thermoplastic resin in the bulletproof functional layer is made of one or a mixture of thermoplastic resins such as polyurethane, polyolefin, polyacrylate, etc.

[0009] As a further improvement, the high-performance fibers in the bulletproof functional layer adopt a UD structure or a fabric structure, and a 0° / 90° orthogonal lamination structure is adopted between the multiple layers of UD structures.

[0010] As a further improvement, the high-performance fiber in the surface layer is PBO fiber, aramid fiber, heterocyclic aramid fiber or PI fiber, and the thermosetting resin in the surface layer is one or a mixture of epoxy resin, phenolic resin, vinyl ester resin and unsaturated polyester resin.

[0011] As a further improvement, the high-performance fibers in the surface layer adopt a UD structure or a fabric structure, and a 0° / 90° orthogonal lamination structure is adopted between the multiple layers of UD structures.

[0012] As another improvement of the utility model, the utility model also provides a bulletproof mobile phone back cover, which is cut from the above-mentioned bulletproof mobile phone back cover plate, and the outer side of the surface layer is processed by a painting process.

[0013] After adopting such a design, the utility model has at least the following advantages:

[0014] 1. The utility model bulletproof mobile phone back cover plate is provided with a bulletproof functional layer, an interface layer and a surface layer, and the bulletproof functional layer provides a bulletproof function, so that the bulletproof mobile phone back cover has the characteristics of excellent bulletproof performance and light weight; the excellent surface adhesion of the surface layer can realize the appearance treatment demand of the later surface spray painting of the bulletproof mobile phone back cover, and also meet the requirements of wear resistance, scratch resistance and not easy to be stained with fingerprints. More importantly, through the interface layer with different interface bonding capabilities, a good hot pressing bonding of the bulletproof functional layer and the surface layer is achieved, the stratification of the bulletproof functional layer and the surface layer is prevented, the integrity of the back cover is improved, and the functions of the bulletproof mobile phone back cover such as being strong, thinner, more durable and bulletproof are met.

[0015] 2. The bulletproof mobile phone back cover of the utility model is a bulletproof product. When impacted by a projectile, it can play a corresponding protective function, play a certain protective role on the life of the carrier, and greatly reduce the risk of the carrier being fatally injured. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0017] Figure 1 The utility model is a structural schematic diagram of a bulletproof mobile phone rear cover. DETAILED DESCRIPTION

[0018] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0019] See attached Figure 1 As shown, the rear cover of the bulletproof mobile phone in this embodiment includes a bulletproof functional layer 1, an interface layer 2 and a surface layer 3 arranged in sequence. The bulletproof functional layer 1 is formed by hot pressing of multiple layers of high-performance fiber-reinforced thermoplastic resin-based bulletproof composite materials. Among them, the high-performance fiber adopts ultra-high molecular weight polyethylene fiber, aramid fiber, heterocyclic aramid fiber, PBO fiber or PI fiber; the thermoplastic resin adopts one or a mixture of thermoplastic resins such as polyurethane, polyolefin, polyacrylate, etc. In addition, the high-performance fiber adopts a UD structure or a fabric structure, and a 0° / 90° orthogonal lamination structure is adopted between the multiple layers of UD structure.

[0020] The surface layer 3 is formed by hot pressing multiple layers of high-performance fiber-reinforced thermosetting resin-based composite materials, wherein the high-performance fiber is PBO fiber, aramid fiber, heterocyclic aramid fiber or PI fiber, and the thermosetting resin is one or a mixture of epoxy resin, phenolic resin, vinyl ester resin, and unsaturated polyester resin. Similarly, the high-performance fiber in the surface layer adopts a UD structure or a fabric structure, and a 0° / 90° orthogonal lamination structure is adopted between multiple layers of UD structures.

[0021] The interface layer 2 is disposed between the bulletproof functional layer 1 and the surface layer 3, and the interface layer 2 comprises a first fiber layer heat-pressed and bonded to the bulletproof functional layer 1 and a second fiber layer heat-pressed and bonded to the surface layer 3. Specifically, the interface layer 2 adopts a fabric structure woven from a first fiber 21 and a second fiber 22, such as a plain weave, a twill weave, or a satin weave, as long as the first fiber 21 is a main fiber of the first fiber layer and the second fiber 22 is a main fiber of the second fiber layer.

[0022] Furthermore, in order to satisfy the adhesion of the interface layer 2 to the bulletproof functional layer 1 and the surface layer 3, the first fiber 21 is the same as the high-performance fiber in the bulletproof functional layer 1 to improve the interface bonding ability with the bulletproof functional layer 1, and the second fiber 22 is the same as the high-performance fiber in the surface layer 3 to improve the bonding ability with the surface layer 3. Of course, the first fiber 21 can also be the same or similar in nature to the high-performance fiber in the bulletproof functional layer 1, as long as it can meet the requirements of hot-press bonding with the bulletproof functional layer 1. Similarly, the second fiber 22 can also be the same or similar in nature to the high-performance fiber in the surface layer 3, as long as it can meet the requirements of hot-press bonding with the surface layer 3.

[0023] The high-performance fiber-reinforced thermoplastic resin-based bulletproof composite material in the bulletproof functional layer 1 of this embodiment can be 2-8 layers, and the high-performance fiber-reinforced thermosetting resin-based composite material in the surface layer 3 can be 2-8 layers, which can be set according to the actual required thickness and protection level of the final bulletproof mobile phone back cover. The bulletproof mobile phone back cover obtained in this embodiment meets the requirements of the ⅡA level in the bulletproof standard NIJ0101.06, and its thickness is less than or equal to 2mm, and has the characteristics of excellent bulletproof performance and light weight.

[0024] The specific embodiments are as follows:

[0025] Example 1

[0026] Six layers of UD structured high molecular weight polyethylene fiber reinforced polyurethane resin bulletproof composite material were stacked and hot pressed for 20 min at a pressure of 20 MPa and a temperature of 130°C to form a bulletproof functional layer.

[0027] The interface layer is made of satin weaving with ultra-high molecular weight polyethylene fiber as the first fiber and aramid fiber as the second fiber. The bulletproof functional layer is stacked with the ultra-high molecular weight polyethylene fiber side of the interface layer, and hot pressed for 10 minutes under the conditions of pressure of 20MPa and temperature of 130℃ to form a whole.

[0028] After the aramid fiber is impregnated with thermosetting epoxy resin to form a UD structure, 5 layers are stacked and bonded to the other side of the interface layer after being pressed into a whole. Under the conditions of a pressure of 1 MPa and a temperature of 130°C, the structure is hot-pressed and cured for 30 minutes, and then cut into a bulletproof mobile phone back cover 1.

[0029] Example 2

[0030] Six layers of UD structured aramid fiber reinforced polyurethane resin bulletproof composite material were stacked and hot pressed for 20 minutes at a pressure of 20 MPa and a temperature of 130°C to form a bulletproof functional layer.

[0031] The warp and weft of the interface layer are both made of aramid fiber and are woven in plain weave. The bulletproof functional layer and the interface layer are stacked and hot pressed for 10 minutes under the conditions of 20MPa pressure and 130℃ temperature to form a whole.

[0032] After the aramid fiber is impregnated with thermosetting epoxy resin to form a UD structure, 5 layers are stacked and bonded to the other side of the interface layer after being pressed into a whole. Under the conditions of a pressure of 1 MPa and a temperature of 130°C, the structure is hot-pressed and cured for 30 minutes, and then cut into a bulletproof mobile phone back cover 2.

[0033] Example 3

[0034] Six layers of UD structured PBO fiber reinforced polyurethane resin bulletproof composite materials were stacked and hot pressed for 20 minutes at a pressure of 20 MPa and a temperature of 130°C to form a bulletproof functional layer.

[0035] The interface layer is made of satin weaving with PBO fiber as the first fiber and aramid fiber as the second fiber. The bulletproof functional layer is laminated with the PBO fiber side of the interface layer, and hot pressed for 10 minutes under the conditions of pressure of 20MPa and temperature of 130℃ to form a whole.

[0036] After the aramid fiber is impregnated with thermosetting epoxy resin to form a UD structure, 5 layers are stacked and bonded to the other side of the interface layer after being pressed into a whole. Under the conditions of pressure of 1 MPa and temperature of 130°C, hot pressing and curing are performed for 30 minutes, and the bulletproof mobile phone back cover 3 is cut.

[0037] Example 4

[0038] Six layers of PI fiber reinforced polyurethane resin bulletproof composite materials with UD structure were stacked and hot pressed for 20 minutes at a pressure of 20 MPa and a temperature of 130°C to form a bulletproof functional layer.

[0039] The interface layer uses PI fiber as the first fiber and aramid fiber as the second fiber, and is satin woven. The bulletproof functional layer is stacked with one side of the PI fiber in the interface layer, and hot pressed for 10 minutes under a pressure of 20 MPa and a temperature of 130°C to form a whole.

[0040] After the aramid fiber is impregnated with thermosetting epoxy resin to form a UD structure, 5 layers are stacked and bonded to the other side of the interface layer after being pressed into a whole. Under the conditions of pressure of 1 MPa and temperature of 130°C, hot pressing and curing are performed for 30 minutes, and the bulletproof mobile phone back cover 4 is cut.

[0041] Example 5

[0042] Six layers of UD structured high molecular weight polyethylene fiber reinforced polyolefin resin bulletproof composite material were stacked and hot pressed for 20 min at a pressure of 20 MPa and a temperature of 130°C to form a bulletproof functional layer.

[0043] The interface layer is made of satin weaving with ultra-high molecular weight polyethylene fiber as the first fiber and aramid fiber as the second fiber. The bulletproof functional layer is stacked with the ultra-high molecular weight polyethylene fiber side of the interface layer, and hot pressed for 10 minutes under the conditions of pressure of 20MPa and temperature of 130℃ to form a whole.

[0044] After the aramid fiber is impregnated with thermosetting epoxy resin to form a UD structure, 5 layers are stacked and attached to the other side of the interface layer after being pressed into a whole. Under the conditions of pressure of 1 MPa and temperature of 130°C, hot pressing and curing are performed for 30 minutes, and the bulletproof mobile phone back cover 5 is cut.

[0045] Example 6

[0046] Four layers of plain woven fabric structured high molecular weight polyethylene fiber reinforced polyurethane resin bulletproof composite material were stacked and hot pressed for 20 min at a pressure of 20 MPa and a temperature of 130°C to form a bulletproof functional layer.

[0047] The interface layer is made of satin weaving with ultra-high molecular weight polyethylene fiber as the first fiber and aramid fiber as the second fiber. The bulletproof functional layer is stacked with the ultra-high molecular weight polyethylene fiber side of the interface layer, and hot pressed for 10 minutes under the conditions of pressure of 20MPa and temperature of 130℃ to form a whole.

[0048] After the aramid fiber is impregnated with thermosetting epoxy resin to form a UD structure, 5 layers are stacked and bonded to the other side of the interface layer after being pressed into a whole. Under the conditions of pressure of 1 MPa and temperature of 130°C, hot pressing and curing are performed for 30 minutes, and the bulletproof mobile phone back cover 6 is cut.

[0049] Example 7

[0050] Six layers of UD structured high molecular weight polyethylene fiber reinforced polyurethane resin bulletproof composite material were stacked and hot pressed for 20 min at a pressure of 20 MPa and a temperature of 130°C to form a bulletproof functional layer.

[0051] The interface layer is made of satin weaving with ultra-high molecular weight polyethylene fiber as the first fiber and aramid fiber as the second fiber. The bulletproof functional layer is stacked with the aramid fiber side of the interface layer, and hot pressed for 10 minutes under the conditions of pressure of 20MPa and temperature of 130℃ to form a whole.

[0052] After the aramid fiber is impregnated with thermosetting epoxy resin to form a UD structure, 5 layers are stacked and attached to the other side of the interface layer after being pressed into a whole. Under the conditions of pressure of 1 MPa and temperature of 130°C, hot pressing and curing are performed for 30 minutes, and the bulletproof mobile phone back cover 7 is cut.

[0053] Example 8

[0054] Six layers of UD structured high molecular weight polyethylene fiber reinforced polyurethane resin bulletproof composite material were stacked and hot pressed for 20 min at a pressure of 20 MPa and a temperature of 130°C to form a bulletproof functional layer.

[0055] The interface layer is made of satin weaving with ultra-high molecular weight polyethylene fiber as the first fiber and aramid fiber as the second fiber. The bulletproof functional layer is stacked with the ultra-high molecular weight polyethylene fiber side of the interface layer, and hot pressed for 10 minutes under the conditions of pressure of 20MPa and temperature of 130℃ to form a whole.

[0056] The aramid fiber plain fabric is then impregnated with a thermosetting epoxy resin and laminated, and then 5 layers are stacked and bonded to the other side of the interface layer after being pressed into a whole. The fabric is hot-pressed and cured for 30 minutes at a pressure of 1 MPa and a temperature of 130°C, and then cut into a bulletproof mobile phone back cover 8.

[0057] Example 9

[0058] Six layers of UD structured high molecular weight polyethylene fiber reinforced polyurethane resin bulletproof composite material were stacked and hot pressed for 20 min at a pressure of 20 MPa and a temperature of 130°C to form a bulletproof functional layer.

[0059] The interface layer is made of satin weaving with ultra-high molecular weight polyethylene fiber as the first fiber and aramid fiber as the second fiber. The bulletproof functional layer is stacked with the ultra-high molecular weight polyethylene fiber side of the interface layer, and hot pressed for 10 minutes under the conditions of pressure of 20MPa and temperature of 130℃ to form a whole.

[0060] After the aramid fiber is impregnated with thermosetting phenolic resin to form a UD structure, 5 layers are stacked and attached to the other side of the interface layer after being pressed into a whole. Under the conditions of pressure of 1 MPa and temperature of 130°C, hot pressing and curing are performed for 30 minutes, and the bulletproof mobile phone back cover 9 is cut.

[0061] Example 10

[0062] Six layers of UD structured high molecular weight polyethylene fiber reinforced polyurethane resin bulletproof composite material were stacked and hot pressed for 20 min at a pressure of 20 MPa and a temperature of 130°C to form a bulletproof functional layer.

[0063] The interface layer is made of satin weaving with ultra-high molecular weight polyethylene fiber as the first fiber and PBO fiber as the second fiber. The bulletproof functional layer is stacked with the ultra-high molecular weight polyethylene fiber side of the interface layer, and hot pressed for 10 minutes under the conditions of pressure of 20MPa and temperature of 130℃ to form a whole.

[0064] The PBO fiber is then infiltrated with a thermosetting epoxy resin to form a UD structure, and then five layers are stacked and bonded to the other side of the interface layer after being pressed into a whole. The structure is hot-pressed and cured for 30 minutes at a pressure of 1 MPa and a temperature of 130° C., and then cut into a bulletproof mobile phone back cover 10 .

[0065] Embodiment 11

[0066] Six layers of UD structured high molecular weight polyethylene fiber reinforced polyurethane resin bulletproof composite material were stacked and hot pressed for 20 min at a pressure of 20 MPa and a temperature of 130°C to form a bulletproof functional layer.

[0067] The interface layer is made of plain weave with ultra-high molecular weight polyethylene fiber as the first fiber and aramid fiber as the second fiber. The bulletproof functional layer is stacked with the ultra-high molecular weight polyethylene fiber side of the interface layer, and hot pressed for 10 minutes under a pressure of 20MPa and a temperature of 130°C to form a whole.

[0068] After the aramid fiber is impregnated with thermosetting epoxy resin to form a UD structure, 5 layers are stacked and attached to the other side of the interface layer after being pressed into a whole. Under the conditions of pressure of 1 MPa and temperature of 130° C., hot pressing and curing are performed for 30 minutes, and the bulletproof mobile phone back cover 11 is cut.

[0069] Example 12

[0070] Six layers of UD structured high molecular weight polyethylene fiber reinforced polyurethane resin bulletproof composite material were stacked and hot pressed for 20 min at a pressure of 20 MPa and a temperature of 130°C to form a bulletproof functional layer.

[0071] The interface layer is made of twill weaving with ultra-high molecular weight polyethylene fiber as the first fiber and aramid fiber as the second fiber. The bulletproof functional layer is stacked with the ultra-high molecular weight polyethylene fiber side of the interface layer, and hot pressed for 10 minutes under a pressure of 20MPa and a temperature of 130°C to form a whole.

[0072] After the aramid fiber is impregnated with thermosetting epoxy resin to form a UD structure, 5 layers are stacked and attached to the other side of the interface layer after being pressed into a whole. Under the conditions of pressure of 1 MPa and temperature of 130° C., hot pressing and curing are performed for 30 minutes, and the bulletproof mobile phone back cover 12 is cut.

[0073] Comparative Example 1

[0074] Six layers of UD structured high molecular weight polyethylene fiber reinforced polyurethane resin bulletproof composite material were stacked and hot pressed for 20 min at a pressure of 20 MPa and a temperature of 130°C to form a bulletproof functional layer.

[0075] After the aramid fiber is impregnated with thermosetting epoxy resin to form a UD structure, 5 layers are stacked and bonded to the bulletproof functional layer. Under the conditions of a pressure of 1 MPa and a temperature of 130° C., the fiber is hot-pressed and cured for 30 minutes, and then cut into a bulletproof mobile phone back cover 13 .

[0076] Comparative Example 2

[0077] Six layers of UD structured aramid fiber reinforced polyurethane resin bulletproof composite material were stacked and hot pressed for 20 minutes at a pressure of 20 MPa and a temperature of 130°C to form a bulletproof functional layer.

[0078] After the aramid fiber is impregnated with thermosetting epoxy resin to form a UD structure, 5 layers are stacked and bonded to the bulletproof functional layer. Under the conditions of a pressure of 1 MPa and a temperature of 130° C., the fiber is hot-pressed and cured for 30 minutes, and then cut into a bulletproof mobile phone back cover 14 .

[0079] Comparative Example 3

[0080] Six layers of UD structured PBO fiber reinforced polyurethane resin bulletproof composite materials were stacked and hot pressed for 20 minutes at a pressure of 20 MPa and a temperature of 130°C to form a bulletproof functional layer.

[0081] After the aramid fiber is impregnated with thermosetting epoxy resin to form a UD structure, 5 layers are stacked and bonded to the bulletproof functional layer. Under the conditions of a pressure of 1 MPa and a temperature of 130°C, the fiber is hot-pressed and cured for 30 minutes, and then cut into a bulletproof mobile phone back cover 15.

[0082] Comparative Example 4

[0083] Six layers of PI fiber reinforced polyurethane resin bulletproof composite materials with UD structure were stacked and hot pressed for 20 minutes at a pressure of 20 MPa and a temperature of 130°C to form a bulletproof functional layer.

[0084] After the aramid fiber is impregnated with thermosetting epoxy resin to form a UD structure, 5 layers are stacked and bonded to the bulletproof functional layer. Under the conditions of a pressure of 1 MPa and a temperature of 130° C., the fiber is hot-pressed and cured for 30 minutes, and then cut into a bulletproof mobile phone back cover 16 .

[0085] Results Test Example

[0086] The bulletproof mobile phone back covers 1-16 obtained in the above examples 1-12 and comparative examples 1-4 were subjected to ballistic tests, while ensuring that the bulletproof mobile phone back covers had the same surface density of 1.9±0.1 kg / m 2Under the condition of (weight of material per unit area), tests were carried out under the same ballistic test conditions to evaluate the back bulge height and the percentage of thickness remaining after penetration of the above-mentioned various bulletproof mobile phone back covers.

[0087] The specific ballistic test conditions are: NIJ0101.06 Ballistic Resistance of Body Armor standard IIA level 9mm FMJ bullet, incident angle of 0°, bullet velocity of 373±9.1m / s, shooting distance of 5m. Multiple shots were performed and the results were averaged, as shown in Table 1 below.

[0088] Table 1 Results of ballistic tests on bulletproof mobile phone back covers 1-16

[0089]

[0090] As can be seen from Table 1 above, the bulletproof mobile phone back covers obtained in Examples 1-6, 8-10, and 12 can all achieve excellent interface bonding effects, and will not crack after being impacted by a projectile. However, the bulletproof mobile phone back covers obtained in Examples 7, 11, and Comparative Examples 1-4 exhibited varying degrees of delamination after being impacted by a projectile, indicating that no interface layer is provided between the bulletproof functional layer and the surface layer, or an interface layer with poor interface bonding is used, which cannot achieve the requirements for a bulletproof mobile phone back cover having a satisfactory interface bonding.

[0091] Furthermore, it can be concluded from the above embodiments that the high-performance fibers in the surface layer can achieve good ballistic test results regardless of whether they are UD structures or plain weave structures, such as a large remaining penetration thickness after being impacted by a bullet. However, due to the mutual restraint between the warp and weft directions of the plain weave fabric, the back convex height of the back cover of the bulletproof mobile phone is smaller, which can reduce non-penetrating damage to the human body.

[0092] The bulletproof mobile phone back cover prepared by the utility model has a bulletproof function of a corresponding level in the bulletproof standard, and is a bulletproof product. When impacted by a projectile, it can play a corresponding protective function and play a certain protective role on the life of the carrier.

[0093] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Those skilled in the art may make some simple modifications, equivalent changes or modifications using the technical contents disclosed above, which are all within the protection scope of the present invention.

Claims

1. A bulletproof mobile phone rear cover, characterized in that: The invention comprises a bulletproof functional layer, an interface layer and a surface layer, wherein the bulletproof functional layer is formed by hot pressing multiple layers of high-performance fiber-reinforced thermoplastic resin-based bulletproof composite materials, and the surface layer is formed by hot pressing multiple layers of high-performance fiber-reinforced thermosetting resin-based composite materials, and the interface layer is arranged between the bulletproof functional layer and the surface layer, and the interface layer comprises a first fiber layer hot-pressed and bonded to the bulletproof functional layer, and a second fiber layer hot-pressed and bonded to the surface layer.

2. The bulletproof mobile phone rear cover according to claim 1, characterized in that: The interface layer adopts a fabric structure woven from first fibers and second fibers, the first fibers are main fibers of the first fiber layer, and the second fibers are main fibers of the second fiber layer.

3. The bulletproof mobile phone rear cover according to claim 2, characterized in that: The first fibers are the same as the high-performance fibers in the ballistic-proof functional layer, and the second fibers are the same as the high-performance fibers in the surface layer.

4. The bulletproof mobile phone rear cover according to claim 3, characterized in that: The high-performance fiber in the bulletproof functional layer is ultra-high molecular weight polyethylene fiber, aramid fiber, heterocyclic aramid fiber, PBO fiber or PI fiber, and the thermoplastic resin in the bulletproof functional layer is one or a mixture of polyurethane, polyolefin, and polyacrylate thermoplastic resin.

5. The bulletproof mobile phone rear cover according to claim 4, characterized in that: The high-performance fibers in the bulletproof functional layer adopt a UD structure or a fabric structure, and a 0° / 90° orthogonal lamination structure is adopted between the multi-layer UD structures.

6. The bulletproof mobile phone rear cover according to claim 3, characterized in that: The high-performance fiber in the surface layer is PBO fiber, aramid fiber, heterocyclic aramid fiber or PI fiber, and the thermosetting resin in the surface layer is one or a mixture of epoxy resin, phenolic resin, vinyl ester resin and unsaturated polyester resin.

7. The bulletproof mobile phone rear cover according to claim 6, characterized in that: The high-performance fibers in the surface layer adopt a UD structure or a fabric structure, and a 0° / 90° orthogonal lamination structure is adopted between the multi-layer UD structures.

8. A bulletproof mobile phone back cover, characterized in that: The bulletproof mobile phone back cover is cut from the bulletproof mobile phone back cover plate according to any one of claims 1 to 7, and the outer side of the surface layer is treated by a spray painting process.

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