Invisible body armor

Abstract

The utility model discloses an invisible body armor which comprises a body armor main body, and the body armor main body sequentially comprises a textile layer and a thermal infrared shielding layer from inside to outside. Containing bags are arranged on the front side and the rear side of the bulletproof vest body, bulletproof pieces are inserted into the containing bags, and each bulletproof piece is sequentially provided with a self-repairing coating, a buffering layer and an anti-impact layer from outside to inside. The bullet-proof sheet adopts the self-repairing layer, the buffer layer and the impact-resistant layer, has a certain self-repairing function, can effectively repair bullet holes, has a certain buffer effect, reduces damage, improves hardness, enhances impact resistance and prevents breakdown. In addition, the thermal infrared shielding layer is arranged on the outer layer, the similar surface temperature difference between the thermal infrared shielding layer and the external environment can be maintained, infrared detection is prevented, and the stealth effect is achieved.

Description

Technical Field

[0001] This utility model relates to the field of bulletproof vest technology, specifically to a stealth bulletproof vest. Background Technology

[0002] Bulletproof vests, also known as body armor, are used to protect the human body from bullets or shrapnel. They mainly consist of a vest cover and a ballistic layer. Current bulletproof vests have the following drawbacks:

[0003] (1) Most bulletproof plates are sewn onto the front and back sides of the bulletproof vest. When they need to be replaced, the sewing of the bulletproof vest needs to be removed, which makes replacement inconvenient.

[0004] (2) The main body of the bulletproof body is generally made of a single ceramic plate, which has poor bulletproof performance;

[0005] (3) Insufficient stealth: Traditional bulletproof materials (such as Kevlar and ceramic plates) are easily detected by radar, infrared or visible light, and cannot meet the multispectral reconnaissance needs of modern battlefields. Utility Model Content

[0006] In view of the shortcomings of the prior art, this utility model provides an invisible bulletproof vest to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0008] A stealth bulletproof vest includes a main body, which comprises a textile layer and a thermal infrared shielding layer from the inside out; the main body has storage pockets on the front and back sides, and bulletproof plates are inserted into the storage pockets, which are composed of a self-healing coating, a cushioning layer and an impact-resistant layer from the outside in.

[0009] Preferably, the self-modifying coating is a self-healing polyurea elastomer coating, the buffer layer is a woven mesh of ultra-high molecular weight polyethylene fibers impregnated with shear thickening liquid, and the impact-resistant layer is a silicon carbide-graphene composite ceramic sheet.

[0010] The above technical solutions enable self-healing polyurea elastomer coatings to repair bullet hole damage. By using a shear-thickening liquid-impregnated ultra-high molecular weight polyethylene fiber woven mesh, energy dissipation and impact reduction can be achieved through viscosity abrupt changes under dynamic impact loads. Furthermore, silicon carbide-graphene composite ceramic sheets can improve hardness and enhance impact resistance.

[0011] Preferably, the thermal infrared shielding layer comprises, from the inside out, a CNT layer and a PCM thin film layer disposed on both sides of the CNT layer.

[0012] The above technical solution employs a composite structure of phase change material (PCM) and carbon nanotube film (CNT) to maintain a surface temperature difference of ≤2℃ in an environment ranging from -20℃ to 50℃.

[0013] Preferably, the front and back sides of the body of the bulletproof vest are sewn with straps, the containment bag is located inside the straps, and the two opposite straps are connected by a snap fastener.

[0014] The above technical solution allows the body armor to be worn stably on the body using straps, and pressing the straps against the storage bag makes the bulletproof shrapnel more stable and prevents it from falling off.

[0015] Preferably, the opening at the top of the accommodating bag is connected to the body of the bulletproof vest via Velcro.

[0016] By using the above technical solution, the opening at the top of the storage bag can be sealed with Velcro, which can further prevent the bulletproof disc from falling off.

[0017] Preferably, the upper part of the bulletproof vest has first storage pockets on both sides, and the front of the bulletproof vest has a second storage pocket sewn between the two straps.

[0018] Through the above technical solution, the first storage bag can store walkie-talkies, etc., and the second storage bag can store magazines, etc., thus increasing the storage space.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] The bulletproof discs are inserted into the pockets on the front and back sides, allowing for quick replacement of the appropriate discs as needed.

[0021] The bulletproof shrapnel uses a self-healing layer, a buffer layer, and an impact-resistant layer. It has a certain self-healing function, which can effectively repair bullet holes. At the same time, it has a certain buffering effect, reducing damage, and increasing hardness, enhancing impact resistance, and preventing penetration.

[0022] By setting a thermal infrared shielding layer on the outer layer, a surface temperature difference similar to that of the external environment can be maintained, preventing infrared detection and achieving a stealth effect. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the present invention;

[0024] Figure 2 This is a cross-sectional view of the bulletproof shrapnel.

[0025] Figure 3 This is a cross-sectional view of the main body of the bulletproof vest;

[0026] In the diagram: 1-Bulletproof vest body, 2-Textile layer, 3-Storage pocket, 4-Bulletproof patch, 5-Self-modifying coating, 6-Buffer layer, 7-Impact-resistant layer, 8-CNT layer, 9-PCM film layer, 10-Strap, 11-Snap fastener, 12-Hook and loop fastener, 13-First storage pocket, 14-Second storage pocket. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example 1

[0029] Please see Figure 1-3 A stealth bulletproof vest includes a vest body 1, which comprises a textile layer 2 and a thermal infrared shielding layer from the inside out. Specifically, the thermal infrared shielding layer comprises a CNT layer 8 and PCM film layers 9 disposed on both sides of the CNT layer, wherein the PCM film layer 9 is a paraffin composite layer and the CNT layer 8 is a porous carbon nanotube structure. A sandwich structure is formed by alternately stacking the PCM layer and the CNT film layer. The CNT layer acts as a thermal conductivity enhancement layer, and the high thermal conductivity network of the carbon nanotubes rapidly transfers external heat to the PCM, triggering its phase change and heat absorption, such as from sunlight exposure or human body heat dissipation, significantly shortening the thermal response time.

[0030] Infrared stealth mechanism: The CNT film absorbs ambient infrared radiation (8-14μm band) and converts it into heat energy, which is then transferred to the PCM. The PCM stores heat through phase change, maintaining a surface temperature difference of ≤2℃ from the ambient background temperature (e.g., when the human body is at 37℃, the surface temperature of the bulletproof vest remains stable at 35-39℃), thus reducing its thermal infrared signature. In a 25℃ environment test, the composite structure can reduce the surface infrared radiation intensity by 85%, with a background matching error of ≤5% (compliant with military standard MIL-STD-3009).

[0031] The method for fabricating the porous carbon nanotube structure of the CNT layer 8 is as follows: (1) Pour the CNT suspension into a mold and freeze it at low temperature (e.g., -196℃ liquid nitrogen) to allow ice crystals to grow and displace the CNTs, forming oriented pores; (2) Freeze-dry to remove the ice crystals while retaining the CNT framework; (3) Enhance the inter-tube connection by chemical vapor deposition (CVD). The porous carbon nanotube structure is finally obtained.

[0032] The method for fabricating the PCM thin film layer 9 is as follows:

[0033] Paraffin wax is mixed with a polymer matrix (such as EVA or TPU) in an internal mixer (temperature > PCM melting point); then a thin film (0.1-2 mm thick) is prepared by a twin-roll calender or casting machine; followed by electron beam irradiation or chemical crosslinking to enhance mechanical strength. Finally, a thin infrared stealth layer is obtained.

[0034] Finally, the PCM film layer 9 is laminated onto the CNT layer, with the CNT layer sandwiched in the middle. This sandwich layer is then laminated onto the textile layer to obtain the bulletproof vest body 1.

[0035] The bulletproof vest body 1 has a storage bag 3 on the front and back sides, and a bulletproof piece 4 is inserted in the storage bag 3. The bulletproof piece 4 consists of a self-healing coating 5, a buffer layer 6 and an impact-resistant layer 7 from the outside to the inside.

[0036] The self-modifying coating 5 is a self-healing polyurea elastomer coating, which can be prepared using the method described in Chinese Invention Patent (Patent No. CN201911136489.4, Patent Title: A Colorless, Highly Transparent, Highly Tensile, and Tear-Resistant Room Temperature Self-Healing Polyurea Elastomer and Preparation Method Thereof). Through this self-healing polyurea elastomer coating, after the coating is damaged by bullet impact, dynamic bond recombination or the release of a repair agent from microcapsules restores surface integrity and prevents moisture / corrosive media from penetrating the bulletproof layer.

[0037] The buffer layer 6 is a woven mesh of ultra-high molecular weight polyethylene fibers impregnated with shear thickening liquid. Energy dissipation and impact reduction can be achieved through viscosity changes under dynamic impact load.

[0038] The impact-resistant layer 7 is a silicon carbide-graphene composite ceramic sheet. The silicon carbide-graphene composite ceramic sheet improves hardness and enhances impact resistance.

[0039] The bulletproof vest body 1 has straps 10 sewn on both the front and back sides. The storage bag 3 is located inside the straps 10, and the two opposite straps 10 are connected by a snap fastener 11. The straps can stably wear the bulletproof vest body on the body, and the straps pressing on the storage bag can make the bulletproof pieces more stable and prevent them from falling off.

[0040] The opening at the top of the storage bag 3 is connected to the body of the bulletproof vest 1 via Velcro 12. Closing the opening at the top of the storage bag with Velcro further prevents the bulletproof fragments from falling out.

[0041] Example 2

[0042] Based on Embodiment 1, the upper part of the bulletproof vest body 1 is provided with first storage pockets 13 on both sides, and a second storage pocket 14 is sewn between the two straps on the front side of the bulletproof vest body 1. The first storage pocket can store walkie-talkies, etc., and the second storage pocket can store magazines, etc., thus increasing the storage space.

[0043] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A stealth bulletproof vest, characterized in that: The body includes a bulletproof vest body (1), which consists of a textile layer (2) and a thermal infrared shielding layer from the inside out; the body of the bulletproof vest body (1) is provided with a storage bag (3) on the front and back sides, and a bulletproof piece (4) is inserted in the storage bag (3). The bulletproof piece (4) consists of a self-healing coating (5), a buffer layer (6) and an impact-resistant layer (7) from the outside to the inside. The bulletproof vest body (1) has straps (10) sewn on both the front and back sides. The containment bag (3) is located inside the straps (10). The two straps (10) facing each other are connected by a snap fastener (11). The opening at the top of the storage bag (3) is connected to the body of the bulletproof vest (1) by Velcro (12); The body of the bulletproof vest (1) has a first storage bag (13) on both sides of the upper part, and a second storage bag (14) is sewn between the two straps on the front side of the body of the bulletproof vest (1).

2. The stealth bulletproof vest according to claim 1, characterized in that: The self-modifying coating (5) is a self-healing polyurea elastomer coating, the buffer layer (6) is a woven mesh of ultra-high molecular weight polyethylene fiber impregnated with shear thickening liquid, and the impact-resistant layer (7) is a silicon carbide-graphene composite ceramic sheet.

3. The stealth bulletproof vest according to claim 2, characterized in that: The thermal infrared shielding layer comprises, from the inside out, a CNT layer (8) and a PCM thin film layer (9) disposed on both sides of the CNT layer.

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