A full-protection tactical vest and a manufacturing method thereof

Abstract

The present application provides a kind of full protection tactical vest and its manufacturing method, tactical vest includes outer layer, intermediate buffer layer, core bulletproof and stab-resistant layer and inner layer in turn from outside to inside;It also includes quick-release type connection system and modular mounting system;With weight fraction, the composition raw material of core bulletproof and stab-resistant layer includes: graphene-boron nitride heterojunction reinforced epoxy resin 20-30 parts, temperature-sensitive shear thickening fluid microcapsule 15-25 parts, polyethylene filament 25-35 parts, aramid 1414 short-cut fiber 10-18 parts, silicon carbide whisker 6-12 parts, silica aerogel 4-8 parts, thermoplastic polyurethane elastomer 8-15 parts, nano zinc oxide 2-5 parts, antioxidant 0.5-1.2 parts, silane coupling agent 1-2 parts.The tactical vest of the present application has excellent bulletproof, stab-resistant performance, while having light weight, good flexibility, wearing comfort and antibacterial, heat insulation, anti-aging characteristics.

Description

Technical Field

[0001] This invention relates to the field of tactical vest technology, specifically to a full-protection tactical vest and its manufacturing method. Background Technology

[0002] As a key protective equipment in military, security, and emergency rescue fields, tactical vests primarily function to provide users with protection against bullets and stabs, while also meeting the requirements of wearing flexibility and long-term durability. Current technologies often employ multi-layered composite structures, integrating conventional protective materials such as polyethylene and aramid fibers to build a protective system, and combining traditional machine cutting and manual sewing processes to achieve the desired look and feel for basic tactical scenarios.

[0003] Current tactical vests still have significant shortcomings in balancing performance optimization and practicality. On the one hand, most products, in pursuit of ballistic and stab-resistant performance, often achieve this by increasing the thickness of protective materials or adding layers of protective material, resulting in an overall heavier vest. This not only increases the user's physical burden but also restricts their limb mobility, making it difficult to simultaneously meet the dual requirements of high protection and lightweight design. On the other hand, the interfacial bonding stability between the components of the protective layers in some tactical vests is insufficient, making them prone to performance degradation due to environmental aging and repeated wear and friction over long-term use. Furthermore, the overall flexibility of the protective layers is poor, resulting in unsatisfactory fit and comfort. Therefore, how to effectively achieve lightweight design and improve wearing comfort while ensuring the core protective performance of tactical vests in terms of ballistic and stab resistance has become a pressing technical challenge for the current tactical vest manufacturing industry. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention provides a full-protection tactical vest and its manufacturing method.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This application discloses a full-protection tactical vest, comprising, from the outside to the inside, an outer layer, a middle buffer layer, a core ballistic and stab-resistant layer, and an inner layer; it also includes a quick-release connection system and a modular mounting system; by weight, the raw materials of the core ballistic and stab-resistant layer include: 20-30 parts of graphene-boron nitride heterostructure reinforced epoxy resin, 15-25 parts of temperature-sensitive shear thickening liquid microcapsules, 25-35 parts of polyethylene filament, 10-18 parts of aramid 1414 chopped fibers, 6-12 parts of silicon carbide whiskers, 4-8 parts of silica aerogel, 8-15 parts of thermoplastic polyurethane elastomer, 2-5 parts of nano zinc oxide, 0.5-1.2 parts of antioxidant, and 1-2 parts of silane coupling agent.

[0006] Using the above technical solutions, graphene-boron nitride heterostructure-reinforced epoxy resin can improve the strength and thermal conductivity of the protective layer; temperature-sensitive shear-thickening liquid microcapsules can achieve dynamic buffering; polyethylene filaments and aramid 1414 chopped fibers synergistically enhance ballistic resistance, tear resistance, and high-temperature resistance; silicon carbide whiskers can strengthen the stab resistance; silica aerogel can achieve lightweighting and thermal insulation; thermoplastic polyurethane elastomer can improve the flexibility of the protective layer and the interfacial adhesion between components; nano zinc oxide has antibacterial properties; antioxidants can inhibit material aging; and silane coupling agents can optimize the dispersion uniformity and interfacial bonding strength of each component. These components work together to give this full protective tactical vest excellent ballistic and stab resistance, while also being lightweight, flexible, comfortable to wear, and possessing antibacterial, thermal insulation, and anti-aging properties, ensuring stability and durability during use.

[0007] Preferably, the polyethylene filament has a weight-average molecular weight of 2.5-3.5 million g / mol and a breaking strength ≥3.8 GPa; the aramid 1414 chopped short fiber has a denier of 1000-1500D and a weight-average molecular weight of 150,000-250,000 g / mol; the thermoplastic polyurethane elastomer has a Shore hardness of 85-90A and a weight-average molecular weight of 8000-20000 g / mol; and the nano zinc oxide has a particle size of 20-40 nm.

[0008] Using the above technical solution, the polyethylene filament, with a weight-average molecular weight of 2.5-3.5 million g / mol and a tensile strength ≥3.8 GPa, possesses excellent impact resistance, effectively resisting projectile impacts and dispersing impact force, becoming a key support for the core ballistic performance of the full-protection tactical vest; the aramid 1414 chopped short fiber, with a denier of 1000-1500D and a weight-average molecular weight of 150,000-250,000 g / mol, gives it good structural strength and temperature stability, enhancing the tear resistance of the protective layer while maintaining mechanical properties in high-temperature environments; thermoplastic... The polyurethane elastomer has a Shore hardness of 85-90A (balancing flexibility and support) and a weight-average molecular weight of 8000-20000 g / mol (ensuring the structural integrity and interfacial compatibility of the elastomer). This not only improves the flexibility of the protective layer, making the vest fit the body and comfortable to wear, but also enhances the interfacial adhesion with other components, ensuring the overall structural stability of the protective layer. The nano zinc oxide has a particle size of 20-40 nm (the nano-sized particle size brings a large specific surface area), which can increase its contact area with bacteria, enhance the antibacterial effect, effectively inhibit the growth of bacteria in the inner layer of the vest, and improve hygiene performance.

[0009] Preferably, the antioxidant is one or more of antioxidant 1010, antioxidant 168, antioxidant 1076, and antioxidant 264, and the silane coupling agent is one of KH-550 or KH-560.

[0010] Using the above technical solution, antioxidants can capture oxidative free radicals generated during processing (such as hot pressing) and use of the core ballistic and stab-resistant layer of the full-protection tactical vest, inhibit oxidation chain reactions, reduce the oxidative degradation of organic matrices such as graphene-boron nitride heterostructure-reinforced epoxy resin and thermoplastic polyurethane elastomer, and polyethylene filaments and aramid 1414 chopped fibers within the layer, avoid the decrease in mechanical strength of the protective layer due to oxidation, and maintain the stability of ballistic and stab-resistant performance. If multiple antioxidants are compounded, they can also play a synergistic role, further broadening the range of antioxidant protection. One of the silane coupling agents KH-550 or KH-560 has one end of its molecule that can react with the hydroxyl groups on the surface of inorganic fillers such as silicon carbide whiskers and nano zinc oxide in the core ballistic and stab-resistant layer, and the other end can crosslink or be compatible with the organic matrix. This can improve the dispersion uniformity of inorganic fillers in the organic matrix, reduce interfacial voids, enhance the interfacial bonding force between the filler and the matrix, ensure the overall structural integrity of the protective layer, and improve the reliability of ballistic and stab-resistant performance.

[0011] Preferably, the raw materials of the graphene-boron nitride heterostructure reinforced epoxy resin, by weight, include: 90-100 parts of epoxy resin E-51, 2-5 parts of graphene sheets, 3-6 parts of hexagonal boron nitride, 1-3 parts of KH-570, 25-35 parts of methyltetrahydrophthalic anhydride, and 100-150 parts of N,N-dimethylformamide; the number of graphene sheets is 3-5 layers, the particle size of hexagonal boron nitride is 50-100 nm, and the weight-average molecular weight of epoxy resin E-51 is 380-450 g / mol.

[0012] Using the above technical solution, the weight-average molecular weight of epoxy resin E-51 is 380-450 g / mol. This molecular weight range gives it suitable fluidity, enabling it to uniformly coat other raw materials and laying the foundation for building a stable resin matrix. The 3-5 layer graphene sheets, with their fewer layers and larger specific surface area, can effectively construct a thermally conductive and reinforcing network, helping to improve the material's thermal conductivity and impact resistance. Hexagonal boron nitride with a particle size of 50-100 nm is easily dispersed and can synergistically optimize the "thermally conductive-reinforcing" dual network with the graphene sheets, further strengthening the material's thermal conductivity and structural strength. The silane coupling agent KH-570 can improve the thermal conductivity and structural strength of the graphene sheets and hexagonal boron nitride. The interfacial bonding performance between boron nitride and epoxy resin E-51 reduces interfacial voids and improves the compatibility of each component. Methyltetrahydrophthalic anhydride can undergo a cross-linking and curing reaction with epoxy resin E-51 to form a stable three-dimensional structure, ensuring the mechanical strength of the resin matrix. N,N-dimethylformamide can be used as a solvent to uniformly disperse solid components such as graphene sheets and hexagonal boron nitride, avoiding agglomeration and ensuring the uniformity of the prepared graphene-boron nitride heterostructure reinforced epoxy resin. This allows for stable performance of thermal conductivity and reinforcement properties, providing a reliable matrix support with both high thermal conductivity and impact resistance for the core ballistic and stab-resistant layer of the full-protection tactical vest.

[0013] Preferably, the preparation method of graphene-boron nitride heterostructure reinforced epoxy resin includes the following steps: 1) Add graphene sheets and hexagonal boron nitride to N,N-dimethylformamide and ultrasonically disperse them for 40-60 min at a power of 500-700 W and a frequency of 38-40 kHz; add KH-570, heat to 80-90℃ and stir at 350-400 r / min for 3-4 h; then centrifuge at 8000-10000 r / min for 15-20 min, and then vacuum dry the obtained solid at 100-120℃ for 5-7 h to obtain graphene-hexagonal boron nitride heterojunction; 2) Heat epoxy resin E-51 to 60-70℃, add methyltetrahydrophthalic anhydride, stir at 600-900 r / min for 15-20 min, then add graphene-hexagonal boron nitride heterojunction, and continue stirring at this speed under a vacuum of -0.09~-0.10 MPa for 2-3 h, cool to room temperature, and obtain graphene-boron nitride heterojunction reinforced epoxy resin.

[0014] Using the above technical solution, ultrasonic dispersion at specific power and frequency allows graphene sheets and hexagonal boron nitride to be uniformly dispersed in N,N-dimethylformamide, preventing agglomeration and ensuring the uniformity of the subsequent heterojunction structure. Adding silane coupling agent KH-570 and stirring the reaction at a specific temperature improves the interfacial bonding performance of graphene sheets, hexagonal boron nitride, and epoxy resin E-51, reducing interfacial voids. Centrifugation and vacuum drying remove solvents and impurities, yielding pure graphene-hexagonal boron nitride heterojunctions, ensuring their reinforcing effect. After heating, epoxy resin E-51 is uniformly mixed with methyltetrahydrophthalic anhydride (curing agent). Then, a heterojunction is added and stirred under vacuum to remove air bubbles from the mixture, preventing them from affecting the density of the resin matrix. The resulting graphene-boron nitride heterojunction reinforced epoxy resin can form a uniform "thermal conductivity-reinforcement" dual network, which has excellent thermal conductivity and impact resistance. It can provide a structurally stable and reliable matrix support for the core ballistic and stab-resistant layer of the full-protection tactical vest, helping to improve the ballistic, stab-resistant and thermal conductivity performance of the protective layer.

[0015] Preferably, the raw materials of the temperature-sensitive shear thickening liquid microcapsules, by weight, include: 40-60 parts of polyethylene glycol 6000, 25-35 parts of nano silica, 15-25 parts of melamine-formaldehyde prepolymer, 2-4 parts of emulsifier OP-10, 0.5-1.0 parts of citric acid, and 80-120 parts of deionized water as the reaction medium; the phase transition temperature of polyethylene glycol 6000 is 38-42℃, the particle size of nano silica is 150-200nm, and the average particle size of the temperature-sensitive shear thickening liquid microcapsules is 10-20μm.

[0016] Using the above technical solution, polyethylene glycol 6000, as the core material of the temperature-sensitive shear-thickening liquid microcapsules, has a phase transition temperature of 38-42℃, which allows the core material to remain flexible under normal conditions and participate in shear thickening under impact, providing a temperature-sensitive and buffering basis for the microcapsules. Nano-silica (particle size 150-200nm) is easily and uniformly dispersed in polyethylene glycol 6000, which can enhance the shear thickening effect of the core material and quickly form resistance to disperse kinetic energy under impact. Melamine-formaldehyde prepolymer, as the wall material, can effectively encapsulate the core material to form a stable capsule, prevent core material leakage, and ensure the microcapsules are stable during processing and use. The structural stability during use; emulsifier OP-10 can help the core material form a stable emulsion in deionized water, ensuring that the wall material uniformly coats the core material and avoids microcapsule aggregation; citric acid can adjust the pH of the reaction system, promote the cross-linking and curing of melamine-formaldehyde prepolymer, and ensure the integrity of the wall material molding; and the average particle size of microcapsules of 10-20μm can not only make them uniformly dispersed in the core ballistic and stab-resistant layer of the tactical vest without affecting the flexibility of the protective layer, but also give full play to the dynamic buffering effect, ultimately enabling the microcapsules to achieve a dynamic adaptation of "low temperature flexibility-impact thickening" in the protective layer, thereby improving the ballistic and buffering performance of the vest.

[0017] Preferably, the preparation method of temperature-sensitive shear-thickening fluid microcapsules includes the following steps: (1) After heating polyethylene glycol 6000 to 50-60℃ to melt, add nano silica and ball mill at 600-700 r / min for 1.5-2 h to obtain a homogeneous shear thickening liquid; (2) Add the shear thickening liquid and emulsifier OP-10 to deionized water, emulsify at 40-50℃ and 1200-1500r / min for 30-40min, then adjust the pH to 4.0-4.5 with citric acid, add melamine-formaldehyde prepolymer, heat to 50-60℃ and stir at 300-350r / min for 5-6h; after cooling to room temperature, centrifuge at 3500-4000r / min for 15-20min, wash with deionized water 3-5 times, and dry at 80-90℃ for 4-6h to obtain temperature-sensitive shear thickening liquid microcapsules.

[0018] Using the above technical solution, polyethylene glycol 6000 is heated and melted, then mixed with nano-silica by ball milling. This ensures the formation of a homogeneous shear-thickening liquid, laying the foundation for the stable temperature-sensitive and buffering properties of the microcapsule core material. Emulsification at specific temperatures and speeds, with the aid of emulsifier OP-10, enables the shear-thickening liquid to form stable emulsion droplets, creating conditions for uniform coating of the subsequent wall material. Adjusting the pH to 4.0-4.5 with citric acid promotes the cross-linking and curing of melamine-formaldehyde prepolymer on the surface of the emulsion droplets. Combined with heating and stirring, this forms a structurally complete and well-sealed wall material, preventing core material leakage. Centrifugation and washing with deionized water remove unreacted raw materials and impurities, and subsequent drying yields a pure microcapsule product. The resulting temperature-sensitive shear-thickening liquid microcapsules remain flexible at low temperatures and thicken rapidly upon impact, providing a reliable dynamic buffering effect for the core ballistic and stab-resistant layer of a full-protection tactical vest, thus enhancing the vest's ballistic and stab-resistant performance.

[0019] Preferably, the outer layer is made of 600D Cordura abrasion-resistant fabric with a warp / weft tensile strength ≥850N / 5cm and a weight-average molecular weight of 18000-35000g / mol for the weaving fibers; the middle cushioning layer is an EVA foam cushioning layer with a thickness of 7-11mm and a density of 0.3-0.5g / cm³. 3 The inner layer is an antibacterial and skin-friendly lining containing 0.2-0.4wt% nano-silver with an antibacterial rate of ≥99.5%; the webbing spacing of the modular mounting system is 20-25mm, which meets the MIL-STD-1913 standard.

[0020] Using the above technical solution, the outer 600D Cordura abrasion-resistant fabric, with a tensile strength of ≥850N / 5cm in both warp and weft directions and a weight-average molecular weight of 18000-35000g / mol for the weaving fibers, possesses excellent abrasion resistance and tear resistance, capable of withstanding external wear, scratches, and minor impacts in tactical scenarios, providing reliable outer layer protection for the tactical vest; the middle EVA foam cushioning layer, with a thickness of 7-11mm and a weight-average molecular weight of 0.3-0.5g / cm, provides additional protection. 3 The density effectively absorbs and disperses external impact energy, reducing the harm to the human body, while also being lightweight to avoid increasing the burden of wearing it; the inner antibacterial and skin-friendly lining, containing 0.2-0.4wt% nano-silver with an antibacterial rate of ≥99.5%, can significantly inhibit the growth of bacteria on the lining surface, ensuring hygiene, while its skin-friendly properties enhance comfort during long-term wear; the modular mounting system with a webbing spacing of 20-25mm conforms to the MIL-STD-1913 standard, enabling precise adaptation to various standard tactical equipment, facilitating quick mounting and dismounting of equipment, and meeting the equipment carrying needs in tactical scenarios.

[0021] Preferably, the quick-release connection system includes a double-secured carbon fiber modified nylon quick-release buckle for the shoulder strap, an adjustable quick-release structure for the waist webbing, and a steel cable linkage device; the nylon quick-release buckle has a carbon fiber content of 15-20wt%, a silicon carbide particle content of 5-8wt%, and a buckling strength ≥2200N; the steel cable has a diameter of 2.0-2.5mm, is coated with a 50-80μm thick polytetrafluoroethylene coating, and has a friction coefficient ≤0.1; the quick-release connection system has a release time ≤1.8s.

[0022] Using the above technical solution, the shoulder straps feature a double-safety carbon fiber modified nylon quick-release buckle. Utilizing the reinforcement of carbon fiber and silicon carbide particles and a buckling strength of ≥2200N, the shoulder straps achieve a stable connection. The double-safety design further enhances connection reliability, preventing accidental loosening in tactical scenarios. The waist webbing adjustment quick-release structure works in conjunction with a steel cable linkage device. The steel cable, coated with PTFE (coefficient of friction ≤0.1), slides smoothly due to its low friction characteristics, reducing resistance during quick release. The overall quick-release connection system, through the coordinated action of its components, achieves a release time of ≤1.8s, meeting the need for rapid vest removal in emergency situations and ensuring user safety.

[0023] This application also discloses a method for manufacturing a full-protection tactical vest, comprising the following steps: S1. Preparation of the core ballistic and stab-resistant layer: S11. Fiber pretreatment: Place polyethylene filament and aramid 1414 chopped fiber in an oven at 100-120℃ and dry for 3-4 hours. Then soak silicon carbide whiskers in a 5-8wt% silane coupling agent ethanol solution (prepared from the silane coupling agent in the raw material with 95% ethanol by volume) for 2-3 hours, and then dry at 110-130℃ for 2-3 hours. S12. Mixing and Impregnation: Pretreated polyethylene filaments, aramid 1414 chopped fibers, silicon carbide whiskers, silica aerogel, nano zinc oxide, and antioxidants are added to a high-speed mixer and mixed at 1500-2000 r / min for 50-70 min. Then, graphene-boron nitride heterostructure reinforced epoxy resin and thermoplastic polyurethane elastomer are added and stirred at 800-1200 r / min for 30-40 min. Finally, temperature-sensitive shear thickening liquid microcapsules are added and stirred at 300-500 r / min for 15-20 min to obtain a uniform slurry. S13. Hot pressing: The slurry obtained in S12 is poured into a custom mold (the mold cavity is adapted to the outline of the tactical vest protective area), placed in a hot press, and the temperature is controlled at 160-190℃, the pressure at 15-25MPa, and the time at 40-60min. After cooling to room temperature, a ballistic and stab-resistant plate with a thickness of 4-8mm is obtained. S14. Post-processing: Use a fiber laser cutting system to trim the dimensions of the sheet material, control the power to be 1200-1500W, the speed to be 3-6m / min, and the auxiliary gas to be nitrogen; spray a 100-150μm thick polyimide coating on the surface of the sheet material, and then cure it at 160-180℃ for 2-3 hours. S2. Overall assembly: S21. Material pretreatment: Place the outer fabric, bulletproof and stab-resistant plate, and middle buffer layer in an environment with a temperature of 23±2℃ and a relative humidity of 50±5% for 24 hours. S22. Precision Laser Cutting: A fiber laser cutting system is used to cut each layer of material. The cutting parameters for the outer fabric are: power 800-1000W, speed 10-14m / min, auxiliary gas compressed air, and focus position +0.5mm; the cutting parameters for the bulletproof and stab-resistant plate are: power 1200-1500W, speed 3-6m / min, auxiliary gas nitrogen, and focus position 0mm; the cutting parameters for the middle buffer layer are: power 600-800W, speed 8-12m / min, auxiliary gas compressed air, and focus position +0.3mm. S23, Buffer layer composite: The intermediate buffer layer is bonded to the bulletproof and puncture-resistant plate with EVA hot melt adhesive, with the temperature controlled at 130-150℃, the pressure at 10-15MPa, and the time at 50-70s. S24. Quick-release system installation: The shoulder strap quick-release buckle is positioned and installed using a special template machine, with a riveting strength ≥1800N; the waist steel cable channel is made of heat-melt bonding and double-thread chain stitching, with a stitch density of 14-18 stitches / 2cm. S25, Modular Sewing: The sewing is done using a fully automatic computerized pattern sewing machine. The protective area uses double-needle four-thread chain stitch with a stitch length of 3.0-3.5mm and a stitch tension of 15-20N. The mounting area uses bar-tack reinforcement sewing with 8-10 reciprocating strokes and a stitch length of 15-20mm. The quick-release channel area uses zigzag sewing with a width of 5-7mm and a stitch length of 2.0-2.5mm. S26. Overall Assembly and Testing: The front vest body, back vest body, shoulder straps and waist belt are assembled by a three-dimensional template machine, and a steel cable quick-release system is integrated; a special test bench is used to simulate the quick release process, the rope pulling force is controlled at 30-50N, and the release time is ≤1.8s; 500 cycles of durability testing are carried out to ensure that there are no functional failures.

[0024] Using the above technical solution, in the fiber pretreatment, the polyethylene filament and aramid 1414 chopped fibers are dried and dehydrated, and silicon carbide whiskers are treated with a silane coupling agent ethanol solution, which can improve the interfacial bonding between the fiber and the filler and avoid the influence of moisture or interfacial voids on the performance of the protective layer. In the mixing and impregnation stage, the components are mixed stepwise at different speeds, which can ensure the uniform dispersion of solid raw materials and avoid damage to the temperature-sensitive shear thickening liquid microcapsules due to high speed, thus ensuring the uniformity of the slurry. The temperature and pressure parameters of hot pressing can make the bulletproof and stab-resistant sheet material densely formed, laying the foundation for bulletproof and stab-resistant properties. In the post-processing, fiber laser cutting ensures the dimensional accuracy of the sheet material, and the polyimide coating enhances the performance. Weather resistance; during overall assembly, material pretreatment eliminates internal stress and prevents deformation; laser precision cutting ensures matching dimensions of each layer; the composite process of the buffer layer avoids air pockets to enhance the cushioning effect; the quick-release system uses a special template machine for positioning and meets the required riveting strength to ensure the quick-release buckles are secure; modular sewing adopts different modes according to the area (such as double-needle four-thread sewing in the protective area and bar-tack reinforcement in the hanging area) to balance strength and adaptability; finally, through quick-release testing and cyclic durability testing, the vest is ensured to have qualified quick-release performance (removal time ≤1.8s) and long-term reliability. The overall process achieves the comprehensive performance requirements of high protection, quick release, and durability of the vest.

[0025] The beneficial effects of this invention are as follows: Graphene-boron nitride heterostructure-reinforced epoxy resin enhances the strength and thermal conductivity of the protective layer; temperature-sensitive shear-thickening liquid microcapsules provide dynamic buffering; polyethylene filaments and aramid 1414 chopped fibers synergistically enhance ballistic resistance, tear resistance, and high-temperature resistance; silicon carbide whiskers strengthen stab resistance; silica aerogel achieves lightweighting and thermal insulation; thermoplastic polyurethane elastomer improves the flexibility of the protective layer and the interfacial adhesion between components; nano-zinc oxide has antibacterial properties; antioxidants inhibit material aging; and silane coupling agents optimize the dispersion uniformity and interfacial bonding strength of each component. These components work together to give this full-protection tactical vest excellent ballistic and stab resistance, while also providing lightweighting, good flexibility, wearing comfort, and antibacterial, thermal insulation, and anti-aging properties, ensuring stability and durability during use.

[0026] The weight-average molecular weight of epoxy resin E-51 is 380-450 g / mol. This molecular weight range provides it with suitable flowability, enabling it to uniformly coat other raw materials and laying the foundation for building a stable resin matrix. 3-5 layer graphene sheets, with their fewer layers and larger specific surface area, can effectively construct a thermally conductive and reinforcing network, helping to improve the material's thermal conductivity and impact resistance. Hexagonal boron nitride with a particle size of 50-100 nm is easily dispersed and can synergistically optimize the "thermally conductive-reinforcing" dual network with graphene sheets, further enhancing the material's thermal conductivity and structural strength. The silane coupling agent KH-570 can improve the interaction between graphene sheets and hexagonal boron nitride. The interfacial bonding performance with epoxy resin E-51 reduces interfacial voids and improves the compatibility of each component; methyltetrahydrophthalic anhydride can undergo a cross-linking and curing reaction with epoxy resin E-51 to form a stable three-dimensional structure, ensuring the mechanical strength of the resin matrix; N,N-dimethylformamide can be used as a solvent to uniformly disperse solid components such as graphene sheets and hexagonal boron nitride, avoiding agglomeration and ensuring that the prepared graphene-boron nitride heterostructure reinforced epoxy resin has uniform composition, thereby stably exerting thermal conductivity and reinforcing properties, providing a reliable matrix support with both high thermal conductivity and impact resistance for the core ballistic and stab-resistant layer of the full-protection tactical vest. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example 1: This embodiment discloses a full-protection tactical vest, comprising, from the outside to the inside, an outer layer, a middle buffer layer, a core ballistic and stab-resistant layer, and an inner layer; it also includes a quick-release connection system and a modular mounting system; by weight, the raw materials of the core ballistic and stab-resistant layer include: 20 parts graphene-boron nitride heterostructure reinforced epoxy resin, 15 parts temperature-sensitive shear thickening liquid microcapsules, 25 parts polyethylene filament, 10 parts aramid 1414 chopped fibers, 6 parts silicon carbide whiskers, 4 parts silica aerogel, 8 parts thermoplastic polyurethane elastomer, 2 parts nano zinc oxide with a particle size of 20nm, 0.5 parts antioxidant 1010, and 1 part KH-550.

[0029] The polyethylene filament has a weight-average molecular weight of 2.5 million g / mol and a breaking strength of ≥3.8 GPa; the aramid 1414 chopped short fiber has a denier of 1000D and a weight-average molecular weight of 150,000 g / mol; the thermoplastic polyurethane elastomer has a Shore hardness of 85A and a weight-average molecular weight of 8000 g / mol.

[0030] The raw materials for graphene-boron nitride heterostructure reinforced epoxy resin, by weight, include: 90 parts of epoxy resin E-51, 2 parts of graphene sheet, 3 parts of hexagonal boron nitride, 1 part of KH-570, 25 parts of methyltetrahydrophthalic anhydride, and 100 parts of N,N-dimethylformamide; the graphene sheet has 3 layers, the hexagonal boron nitride has a particle size of 50 nm, and the weight-average molecular weight of epoxy resin E-51 is 380 g / mol.

[0031] The preparation method of graphene-boron nitride heterostructure reinforced epoxy resin includes the following steps: 1) Graphene sheets and hexagonal boron nitride were added to N,N-dimethylformamide and ultrasonically dispersed for 40 min at a power of 500 W and a frequency of 38 kHz. KH-570 was added, the temperature was raised to 80 °C, and the mixture was stirred at 350 r / min for 3 h. Then, the mixture was centrifuged at 8000 r / min for 15 min, and the resulting solid was vacuum dried at 100 °C for 5 h to obtain a graphene-hexagonal boron nitride heterojunction. 2) Epoxy resin E-51 was heated to 60°C, methyltetrahydrophthalic anhydride was added, and the mixture was stirred at 600 r / min for 15 min. Then, graphene-hexagonal boron nitride heterojunction was added, and the mixture was stirred at the same speed for 2 h under a vacuum of -0.09 MPa. The mixture was then cooled to room temperature to obtain graphene-boron nitride heterojunction reinforced epoxy resin.

[0032] By weight, the components of the thermosensitive shear thickening liquid microcapsules include: 40 parts of polyethylene glycol 6000 with a phase change temperature of 38℃, 25 parts of nano-silica with a particle size of 150nm, 15 parts of melamine-formaldehyde prepolymer, 2 parts of emulsifier OP-10, 0.5 parts of citric acid, and 80 parts of deionized water as the reaction medium; the average particle size of the thermosensitive shear thickening liquid microcapsules is 10μm.

[0033] The preparation method of temperature-sensitive shear-thickening fluid microcapsules includes the following steps: (1) After heating polyethylene glycol 6000 to 50°C to melt, nano-silica was added and ball-milled at 600 r / min for 1.5 h to obtain a homogeneous shear thickening liquid; (2) The shear thickening liquid and emulsifier OP-10 were added to deionized water and emulsified at 40°C and 1200 r / min for 30 min. Then, the pH was adjusted to 4.0 with citric acid, melamine-formaldehyde prepolymer was added, the temperature was raised to 50°C and stirred at 300 r / min for 5 h. After cooling to room temperature, the mixture was centrifuged at 3500 r / min for 15 min, washed 3 times with deionized water, and dried at 80°C for 4 h to obtain temperature-sensitive shear thickening liquid microcapsules.

[0034] The outer layer is made of 600D Cordura abrasion-resistant fabric with a warp / weft tensile strength ≥850N / 5cm and a weight-average molecular weight of 18000g / mol for the weaving fibers; the middle cushioning layer is an EVA foam cushioning layer with a thickness of 7mm and a density of 0.3g / cm³. 3 The inner layer is an antibacterial and skin-friendly lining containing 0.2wt% nano-silver with an antibacterial rate of ≥99.5%; the webbing spacing of the modular mounting system is 20mm, which meets the MIL-STD-1913 standard.

[0035] The quick-release connection system includes a double-secured carbon fiber modified nylon quick-release buckle for the shoulder strap, an adjustable quick-release structure for the waist webbing, and a steel cable linkage device; the nylon quick-release buckle has a carbon fiber content of 15wt% and a silicon carbide particle content of 5wt%, with a buckling strength ≥2200N; the steel cable has a diameter of 2.0mm, is coated with a 50μm thick polytetrafluoroethylene coating, and has a friction coefficient ≤0.1; the quick-release connection system has a release time ≤1.8s.

[0036] This embodiment also discloses a method for manufacturing a full-protection tactical vest, including the following steps: S1. Preparation of the core ballistic and stab-resistant layer: S11. Fiber pretreatment: Polyethylene filament and aramid 1414 chopped fiber are dried in an oven at 100℃ for 3 hours. Then, silicon carbide whiskers are soaked in a 5wt% KH-550 ethanol solution (prepared from KH-550 in the raw material with ethanol) for 2 hours, and then dried at 110℃ for 2 hours. S12. Mixing and Impregnation: Pretreated polyethylene filaments, aramid 1414 chopped fibers, silicon carbide whiskers, silica aerogel, nano zinc oxide, and antioxidant 1010 are added to a high-speed mixer and mixed at 1500 r / min for 50 min. Then, graphene-boron nitride heterostructure reinforced epoxy resin and thermoplastic polyurethane elastomer are added and stirred at 800 r / min for 40 min. Finally, temperature-sensitive shear thickening liquid microcapsules are added and stirred at 300 r / min for 15 min to obtain a uniform slurry. S13. Hot pressing: The slurry obtained in S12 is poured into a custom mold, placed in a hot press, and the temperature is controlled at 160℃, the pressure at 15MPa, and the time at 40min. After cooling to room temperature, a bulletproof and puncture-resistant sheet with a thickness of 4mm is obtained. S14. Post-processing: The dimensions of the sheet are trimmed using a fiber laser cutting system, with a power of 1200W, a speed of 3m / min, and nitrogen as the auxiliary gas; a 100μm thick polyimide coating is sprayed onto the surface of the sheet, and then cured at 160℃ for 2h. S2. Overall assembly: S21. Material pretreatment: Place the outer fabric, bulletproof and stab-resistant sheet, and middle buffer layer in an environment with a temperature of 23℃ and a relative humidity of 50% for 24 hours. S22. Precision Laser Cutting: A fiber laser cutting system is used to cut each layer of material. The cutting parameters for the outer fabric are: power 800W, speed 10m / min, auxiliary gas: compressed air, and focus position +0.5mm; the cutting parameters for the bulletproof and stab-resistant plate are: power 1200W, speed 3m / min, auxiliary gas: nitrogen, and focus position 0mm; the cutting parameters for the middle buffer layer are: power 600W, speed 8m / min, auxiliary gas: compressed air, and focus position +0.3mm. S23, Buffer layer composite: The intermediate buffer layer is bonded to the bulletproof and puncture-resistant plate with EVA hot melt adhesive, with the temperature controlled at 130℃, the pressure at 10MPa, and the time at 50s. S24. Quick-release system installation: The shoulder strap quick-release buckle is positioned and installed using a special template machine, with a riveting strength ≥1800N; the waist steel cable channel is made of heat-melt bonding and double-thread chain stitching, with a stitch density of 14 stitches / 2cm. S25, Modular Sewing: The fully automatic computer pattern sewing machine is used. The protective area is sewn with double needle four-thread chain stitch with a stitch length of 3.0mm and a stitch tension of 15N. The hanging area is reinforced with bar-tack stitching with 8 reciprocating strokes and a stitch length of 15mm. The quick-release channel area is sewn with zigzag stitching with a width of 5mm and a stitch length of 2.0mm. S26. Overall Assembly and Testing: The front vest body, back vest body, shoulder straps and waist belt are assembled by a three-dimensional template machine, and a steel cable quick-release system is integrated; a special test bench is used to simulate the quick release process, the pull rope tension is controlled at 30N, and the release time is ≤1.8s; 500 cycles of durability testing are carried out to ensure that there are no functional failures.

[0037] Example 2: This embodiment discloses a full-protection tactical vest, comprising an outer layer, a middle buffer layer, a core ballistic and stab-resistant layer, and an inner layer arranged sequentially from the outside to the inside; it also includes a quick-release connection system and a modular mounting system; by weight, the raw materials of the core ballistic and stab-resistant layer include: 30 parts of graphene-boron nitride heterostructure reinforced epoxy resin, 25 parts of temperature-sensitive shear thickening liquid microcapsules, 35 parts of polyethylene filament, 18 parts of aramid 1414 chopped fibers, 12 parts of silicon carbide whiskers, 8 parts of silica aerogel, 15 parts of thermoplastic polyurethane elastomer, 5 parts of nano zinc oxide with a particle size of 40nm, 1.2 parts of antioxidant 168, and 2 parts of KH-560.

[0038] The polyethylene filament has a weight-average molecular weight of 3.5 million g / mol and a breaking strength of ≥3.8 GPa; the aramid 1414 chopped fiber has a denier of 1500D and a weight-average molecular weight of 250,000 g / mol; the thermoplastic polyurethane elastomer has a Shore hardness of 90A and a weight-average molecular weight of 20,000 g / mol.

[0039] The raw materials for graphene-boron nitride heterostructure reinforced epoxy resin, by weight, include: 100 parts of epoxy resin E-51, 5 parts of graphene sheet, 6 parts of hexagonal boron nitride, 3 parts of KH-570, 35 parts of methyltetrahydrophthalic anhydride, and 150 parts of N,N-dimethylformamide; the graphene sheet has 5 layers, the hexagonal boron nitride has a particle size of 100 nm, and the epoxy resin E-51 has a weight-average molecular weight of 450 g / mol.

[0040] The preparation method of graphene-boron nitride heterostructure reinforced epoxy resin includes the following steps: 1) Graphene sheets and hexagonal boron nitride were added to N,N-dimethylformamide and ultrasonically dispersed for 60 min at a power of 700 W and a frequency of 40 kHz. KH-570 was added, the temperature was raised to 90 °C and stirred at 400 r / min for 4 h. Then, the mixture was centrifuged at 10000 r / min for 20 min and the resulting solid was vacuum dried at 120 °C for 7 h to obtain a graphene-hexagonal boron nitride heterojunction. 2) Epoxy resin E-51 was heated to 70°C, methyltetrahydrophthalic anhydride was added, and the mixture was stirred at 900 r / min for 20 min. Then, graphene-hexagonal boron nitride heterojunction was added, and the mixture was stirred at the same speed for 3 h under a vacuum of -0.10 MPa. The mixture was then cooled to room temperature to obtain graphene-boron nitride heterojunction reinforced epoxy resin.

[0041] By weight, the components of the thermosensitive shear thickening fluid microcapsules include: 60 parts of polyethylene glycol 6000 with a phase change temperature of 42℃, 35 parts of nano-silica with a particle size of 200nm, 25 parts of melamine-formaldehyde prepolymer, 4 parts of emulsifier OP-10, 1.0 part of citric acid, and 120 parts of deionized water as the reaction medium; the average particle size of the thermosensitive shear thickening fluid microcapsules is 20μm.

[0042] The preparation method of temperature-sensitive shear-thickening fluid microcapsules includes the following steps: (1) After heating polyethylene glycol 6000 to 60°C to melt, nano silica was added and ball-milled at 700 r / min for 2 h to obtain a homogeneous shear thickening liquid; (2) The shear thickening liquid and emulsifier OP-10 were added to deionized water and emulsified at 50°C and 1500 r / min for 40 min. Then, the pH was adjusted to 4.5 with citric acid, melamine-formaldehyde prepolymer was added, the temperature was raised to 60°C and stirred at 350 r / min for 6 h. After cooling to room temperature, the mixture was centrifuged at 4000 r / min for 20 min, washed 5 times with deionized water, and dried at 90°C for 6 h to obtain temperature-sensitive shear thickening liquid microcapsules.

[0043] The outer layer is made of 600D Cordura abrasion-resistant fabric with a warp / weft tensile strength ≥850N / 5cm and a weight-average molecular weight of 35000g / mol for the weaving fibers; the middle cushioning layer is an EVA foam cushioning layer with a thickness of 11mm and a density of 0.5g / cm³. 3 The inner layer is an antibacterial and skin-friendly lining containing 0.4wt% nano-silver with an antibacterial rate of ≥99.5%; the webbing spacing of the modular mounting system is 25mm, which meets the MIL-STD-1913 standard.

[0044] The quick-release connection system includes a double-secured carbon fiber modified nylon quick-release buckle for the shoulder strap, an adjustable quick-release structure for the waist webbing, and a steel cable linkage device; the nylon quick-release buckle has a carbon fiber content of 20wt% and a silicon carbide particle content of 8wt%, with a buckling strength ≥2200N; the steel cable has a diameter of 2.5mm, is coated with an 80μm thick polytetrafluoroethylene coating, and has a friction coefficient ≤0.1; the quick-release connection system has a release time ≤1.8s.

[0045] This embodiment also discloses a method for manufacturing a full-protection tactical vest, including the following steps: S1. Preparation of the core ballistic and stab-resistant layer: S11. Fiber pretreatment: Polyethylene filament and aramid 1414 chopped fiber are dried in an oven at 120℃ for 4 hours. Then, silicon carbide whiskers are soaked in an 8wt% KH-560 ethanol solution (prepared from KH-560 in the raw material with ethanol) for 3 hours, and then dried at 130℃ for 3 hours. S12. Mixing and Impregnation: Pretreated polyethylene filaments, aramid 1414 chopped fibers, silicon carbide whiskers, silica aerogel, nano zinc oxide, and antioxidant 168 are added to a high-speed mixer and mixed at 2000 r / min for 70 min. Then, graphene-boron nitride heterostructure reinforced epoxy resin and thermoplastic polyurethane elastomer are added and stirred at 1200 r / min for 40 min. Finally, temperature-sensitive shear thickening liquid microcapsules are added and stirred at 500 r / min for 20 min to obtain a uniform slurry. S13. Hot pressing: The slurry obtained in S12 is poured into a custom mold, placed in a hot press, and the temperature is controlled at 190℃, the pressure at 25MPa, and the time at 60min. After cooling to room temperature, a bulletproof and puncture-resistant sheet with a thickness of 8mm is obtained. S14. Post-processing: The dimensions of the sheet are trimmed using a fiber laser cutting system, with a power of 1500W, a speed of 6m / min, and nitrogen as the auxiliary gas; a 150μm thick polyimide coating is sprayed onto the surface of the sheet, and then cured at 180℃ for 3h. S2. Overall assembly: S21. Material pretreatment: Place the outer fabric, bulletproof and stab-resistant sheet, and middle buffer layer in an environment with a temperature of 25℃ and a relative humidity of 55% for 24 hours. S22. Precision Laser Cutting: A fiber laser cutting system is used to cut each layer of material. The cutting parameters for the outer fabric are: power 1000W, speed 14m / min, auxiliary gas: compressed air, and focus position +0.5mm; the cutting parameters for the bulletproof and stab-resistant plate are: power 1500W, speed 6m / min, auxiliary gas: nitrogen, and focus position 0mm; the cutting parameters for the middle buffer layer are: power 800W, speed 12m / min, auxiliary gas: compressed air, and focus position +0.3mm. S23, Buffer layer composite: The intermediate buffer layer is bonded to the bulletproof and puncture-resistant plate with EVA hot melt adhesive, and the temperature is controlled at 150℃, the pressure at 15MPa and the time at 70s. S24. Quick-release system installation: The shoulder strap quick-release buckle is positioned and installed using a special template machine, with a riveting strength ≥1800N; the waist steel cable channel is made of heat-melt bonding and double-thread chain stitching, with a stitch density of 18 stitches / 2cm. S25, Modular Sewing: The sewing is done by a fully automatic computerized pattern sewing machine. The protective area is sewn with double needles and four threads in a chain stitch with a stitch length of 3.5mm and a stitch tension of 20N. The hanging area is sewn with bar-tack reinforcement, with 10 reciprocating stitches and a stitch length of 20mm. The quick-release channel area is sewn with zigzag stitch with a width of 7mm and a stitch length of 2.5mm. S26. Overall Assembly and Testing: The front vest body, back vest body, shoulder straps and waist belt are assembled by a three-dimensional template machine, and a steel cable quick-release system is integrated; a special test bench is used to simulate the quick release process, the pull rope tension is controlled at 50N, and the release time is ≤1.8s; 500 cycles of durability testing are carried out to ensure that there are no functional failures.

[0046] Example 3: This embodiment discloses a full-protection tactical vest, comprising, from the outside to the inside, an outer layer, a middle buffer layer, a core ballistic and stab-resistant layer, and an inner layer; it also includes a quick-release connection system and a modular mounting system; by weight, the raw materials of the core ballistic and stab-resistant layer include: 25 parts graphene-boron nitride heterojunction reinforced epoxy resin, 20 parts temperature-sensitive shear thickening liquid microcapsules, 30 parts polyethylene filament, 14 parts aramid 1414 chopped short fibers, 9 parts silicon carbide whiskers, 6 parts silica aerogel, 11 parts thermoplastic polyurethane elastomer, 4 parts nano zinc oxide with a particle size of 30nm, 0.9 parts antioxidant 1076, and 1.5 parts KH-560.

[0047] The polyethylene filament has a weight-average molecular weight of 3 million g / mol and a breaking strength of ≥3.8 GPa; the aramid 1414 chopped short fiber has a denier of 1250D and a weight-average molecular weight of 200,000 g / mol; the thermoplastic polyurethane elastomer has a Shore hardness of 88A and a weight-average molecular weight of 14,000 g / mol.

[0048] The raw materials for the graphene-boron nitride heterostructure reinforced epoxy resin, by weight, include: 95 parts of epoxy resin E-51, 4 parts of graphene sheet, 4 parts of hexagonal boron nitride, 2 parts of KH-570, 30 parts of methyltetrahydrophthalic anhydride, and 125 parts of N,N-dimethylformamide; the graphene sheet has 4 layers, the hexagonal boron nitride has a particle size of 75 nm, and the epoxy resin E-51 has a weight-average molecular weight of 410 g / mol.

[0049] The preparation method of graphene-boron nitride heterostructure reinforced epoxy resin includes the following steps: 1) Graphene sheets and hexagonal boron nitride were added to N,N-dimethylformamide and ultrasonically dispersed for 50 min at a power of 600 W and a frequency of 39 kHz. KH-570 was added, the temperature was raised to 85 °C, and the mixture was stirred at 375 r / min for 3.5 h. Then, the mixture was centrifuged at 9000 r / min for 17 min, and the resulting solid was vacuum dried at 110 °C for 6 h to obtain a graphene-hexagonal boron nitride heterojunction. 2) Epoxy resin E-51 was heated to 65°C, methyltetrahydrophthalic anhydride was added, and the mixture was stirred at 750 r / min for 17 min. Then, graphene-hexagonal boron nitride heterojunction was added, and the mixture was stirred at the same speed for 2.5 h under a vacuum of -0.095 MPa. After cooling to room temperature, graphene-boron nitride heterojunction reinforced epoxy resin was obtained.

[0050] By weight, the components of the thermosensitive shear thickening fluid microcapsules include: 50 parts of polyethylene glycol 6000 with a phase change temperature of 40℃, 30 parts of nano-silica with a particle size of 175nm, 20 parts of melamine-formaldehyde prepolymer, 3 parts of emulsifier OP-10, 0.7 parts of citric acid, and 100 parts of deionized water as the reaction medium; the average particle size of the thermosensitive shear thickening fluid microcapsules is 15μm.

[0051] The preparation method of temperature-sensitive shear-thickening fluid microcapsules includes the following steps: (1) After heating polyethylene glycol 6000 to 55°C to melt, nano silica was added and ball-milled at 650 r / min for 2 h to obtain a homogeneous shear thickening liquid; (2) The shear thickening liquid and emulsifier OP-10 were added to deionized water and emulsified at 45°C and 1350 r / min for 35 min. Then, the pH was adjusted to 4.2 with citric acid, melamine-formaldehyde prepolymer was added, the temperature was raised to 55°C and stirred at 325 r / min for 5.5 h. After cooling to room temperature, the mixture was centrifuged at 3750 r / min for 17 min, washed 4 times with deionized water, and dried at 85°C for 5 h to obtain temperature-sensitive shear thickening liquid microcapsules.

[0052] The outer layer is made of 600D Cordura abrasion-resistant fabric with a warp / weft tensile strength ≥850N / 5cm and a weight-average molecular weight of 26000g / mol for the weaving fibers; the middle cushioning layer is an EVA foam cushioning layer with a thickness of 9mm and a density of 0.4g / cm³. 3 The inner layer is an antibacterial and skin-friendly lining containing 0.3wt% nano-silver with an antibacterial rate of ≥99.5%; the webbing spacing of the modular mounting system is 22mm, which meets the MIL-STD-1913 standard.

[0053] The quick-release connection system includes a double-secured carbon fiber modified nylon quick-release buckle for the shoulder strap, an adjustable quick-release structure for the waist webbing, and a steel cable linkage device; the nylon quick-release buckle has a carbon fiber content of 17wt% and a silicon carbide particle content of 7wt%, with a buckling strength ≥2200N; the steel cable has a diameter of 2.2mm, is coated with a 65μm thick polytetrafluoroethylene coating, and has a friction coefficient ≤0.1; the quick-release connection system has a release time ≤1.8s.

[0054] This embodiment also discloses a method for manufacturing a full-protection tactical vest, including the following steps: S1. Preparation of the core ballistic and stab-resistant layer: S11. Fiber pretreatment: Polyethylene filament and aramid 1414 chopped fibers are dried in an oven at 110℃ for 3.5h. Then, silicon carbide whiskers are soaked in a 7wt% KH-560 ethanol solution (prepared from KH-560 in the raw materials with ethanol) for 2.5h, and then dried at 120℃ for 2.5h. S12. Mixing and Impregnation: Pretreated polyethylene filaments, aramid 1414 chopped fibers, silicon carbide whiskers, silica aerogel, nano zinc oxide, and antioxidant 1076 are added to a high-speed mixer and mixed at 1750 r / min for 60 min. Then, graphene-boron nitride heterostructure reinforced epoxy resin and thermoplastic polyurethane elastomer are added and stirred at 1000 r / min for 35 min. Finally, temperature-sensitive shear thickening liquid microcapsules are added and stirred at 400 r / min for 17 min to obtain a uniform slurry. S13. Hot pressing: The slurry obtained in S12 is poured into a custom mold, placed in a hot press, and the temperature is controlled at 175℃, the pressure at 20MPa, and the time at 50min. After cooling to room temperature, a 6mm thick bulletproof and puncture-resistant sheet material is obtained. S14. Post-processing: The dimensions of the sheet are trimmed using a fiber laser cutting system, with a power of 1350W, a speed of 5m / min, and nitrogen as the auxiliary gas; a 125μm thick polyimide coating is sprayed onto the surface of the sheet, and then cured at 170℃ for 2.5h. S2. Overall assembly: S21. Material pretreatment: Place the outer fabric, bulletproof and stab-resistant sheet, and middle buffer layer in an environment with a temperature of 23℃ and a relative humidity of 50% for 24 hours. S22. Precision Laser Cutting: A fiber laser cutting system is used to cut each layer of material. The cutting parameters for the outer fabric are: power 900W, speed 12m / min, auxiliary gas: compressed air, and focus position +0.5mm; the cutting parameters for the bulletproof and stab-resistant plate are: power 1350W, speed 5m / min, auxiliary gas: nitrogen, and focus position 0mm; the cutting parameters for the middle buffer layer are: power 700W, speed 10m / min, auxiliary gas: compressed air, and focus position +0.3mm. S23, Buffer layer composite: The intermediate buffer layer is bonded to the bulletproof and puncture-resistant plate with EVA hot melt adhesive, with the temperature controlled at 140℃, the pressure at 12MPa, and the time at 60s. S24. Quick-release system installation: The shoulder strap quick-release buckle is positioned and installed using a special template machine, with a riveting strength ≥1800N; the waist steel cable channel is made of heat-melt bonding and double-thread chain stitching, with a stitch density of 16 stitches / 2cm. S25, Modular Sewing: The protective area is sewn with a fully automatic computer pattern sewing machine. The protective area is sewn with a double needle four-thread chain stitch with a stitch length of 3.3mm and a stitch tension of 17N. The hanging area is sewn with a bar-tack reinforcement stitch with 9 reciprocations and a stitch length of 17mm. The quick-release channel area is sewn with a zigzag stitch with a width of 6mm and a stitch length of 2.2mm. S26. Overall Assembly and Testing: The front vest body, back vest body, shoulder straps and waist belt are assembled by a three-dimensional template machine, and a steel cable quick-release system is integrated; a special test bench is used to simulate the quick release process, the pull rope tension is controlled at 40N, and the release time is ≤1.8s; 500 cycles of durability testing are carried out to ensure that there are no functional failures.

[0055] Comparative Example 1: A full-protection tactical vest and its manufacturing method are disclosed, which differ from Example 3 only in that: no graphene-boron nitride heterojunction reinforced epoxy resin is added, and an equal amount of ordinary epoxy resin E-51 is used instead.

[0056] Comparative Example 2: A full-protection tactical vest and its manufacturing method are disclosed, which differ from Example 3 only in that: temperature-sensitive shear-thickening liquid microcapsules are not added, but an equal amount of polyethylene glycol 6000 is used instead.

[0057] Comparative Example 3: A full-protection tactical vest and its manufacturing method are disclosed, which differ from Example 3 only in that silicon carbide whiskers are not added.

[0058] Comparative Example 4: A full-protection tactical vest and its manufacturing method are disclosed, which differ from Example 3 only in that silica aerogel is not added.

[0059] Comparative Example 5: A full-protection tactical vest and its manufacturing method are disclosed, which differ from Example 3 only in that nano zinc oxide is not added.

[0060] Comparative Example 6: A full-protection tactical vest and its manufacturing method are disclosed, the only difference between the vest and Example 3 is that the hot pressing temperature is changed to 130-150℃.

[0061] Comparative Example 7: A full-protection tactical vest and its manufacturing method are disclosed, the only difference between the vest and Example 3 is that the hot pressing pressure is changed to 8-10 MPa.

[0062] Comparative Example 8: A full-protection tactical vest and its manufacturing method are disclosed, which differ from Example 3 only in that the post-treatment does not involve spraying a polyimide coating.

[0063] The tactical vests obtained in Examples 1-3 and Comparative Examples 1-8 were tested for ballistic V50 value, puncture resistance, thermal conductivity, antibacterial rate, quick-release time, quick-release buckle strength, areal density, weather resistance retention rate, and back convexity depth. The testing methods and standards are as follows: 1. Ballistic V50 Value Test: Refer to GA 141-2010 "General Technical Conditions for Bulletproof Vests" (Level II Protection). Cut the ballistic and stab-resistant plate into 100mm×100mm specimens (5 pieces) and fix them on the test table; use 1.1g spherical steel bullets (5.56mm in diameter) with an initial velocity of 550-750m / s, and record the penetration and non-penetration velocities; calculate the V50 value (unit: m / s) corresponding to a 50% penetration probability according to the standard formula.

[0064] 2. Puncture resistance test: Refer to GB / T 24586-2009 "Stab-resistant clothing" (Level 1 protection). Cut the fabric into 150mm×150mm samples (5 samples) and fix them on the puncture test table; use a standard puncture needle (blade angle 30°, mass 2.4kg), drop it from a height of 500mm, and record the maximum force (unit: N) when the needle penetrates the fabric.

[0065] 3. Thermal conductivity testing: Refer to GB / T 10294-2008 "Determination of Steady-State Thermal Resistance and Related Properties of Thermal Insulation Materials" (Hot Plate Method). The test temperature is 25℃, with a temperature difference of 10℃ between the hot and cold plates. After the heat flow stabilizes, record the heat flux density Q (unit: W / m³). 2 The result is calculated using the formula λ=Q×d / (A×ΔT) (where d is the sample thickness in meters and A is the test area in square meters). 2 ΔT is the temperature difference between the hot and cold plates (unit: K), and the result is in W·m. -1 ・K -1 .

[0066] 4. Antibacterial rate test: Refer to GB / T 20944.3-2008 "Evaluation of antibacterial properties of textiles - Part 3" (oscillation method). Cut the inner lining into 50mm×50mm samples, sterilize, and add Escherichia coli bacterial solution (concentration 10). 6 CFU / mL); shake at 37℃ for 24 h, count the number of viable bacteria; calculate according to the formula "antibacterial rate = (number of viable bacteria in blank group - number of viable bacteria in sample group) / number of viable bacteria in blank group × 100%", and the result is in units of %.

[0067] 5. Quick-release time test: Adopting tactical equipment testing standards. A dedicated test bench is used to simulate the triggering of the drawstring, and the time from pulling the drawstring to the vest being completely removed is recorded. The average value is taken after 10 tests (unit: seconds).

[0068] 6. Quick-release buckle strength test: Refer to MIL-STD-810G "Environmental Engineering Considerations and Laboratory Testing" (Dynamic Tensile Test). Apply dynamic tensile force to the quick-release buckle (loading rate 50 mm / min) and record the maximum force (unit: N) when the quick-release buckle deforms or breaks.

[0069] 7. Areal density test: Refer to GB / T 24218.1-2009 "Textiles - Nonwovens - Test Methods - Part 1: Determination of mass per unit area". Take a 100mm × 100mm sample and weigh it (accuracy 0.01g); calculate the areal density using the formula "areal density = sample mass / (sample length × sample width)", and the result is in kg / m³. 2 .

[0070] 8. Weather resistance retention rate test: Refer to GB / T 14522-2008 "Artificial Climate Aging Test Method for Plastics, Coatings and Rubber Materials for Machinery Industry Products" (Xenon Lamp Aging). Place the fabric in a xenon lamp aging chamber (irradiation intensity 60W / m²). 2 (At 60℃ and 50% humidity), aged for 1000 hours; the fracture strength before and after aging was tested and calculated according to the formula "Retention rate = Strength after aging / Strength before aging × 100%", with the result in units of .

[0071] 9. Back bulge depth test: Refer to NIJ 0101.06 "Ballistic Resistance of Body Armor". A 9mm full metal jacketed bullet (velocity 380m / s) was used to impact the specimen, and the maximum depth of the back bulge after impact was measured using a depth gauge (unit: mm).

[0072] The results are shown in Table 1.

[0073] Table 1 Performance parameters of the tactical vests obtained in Examples 1-3 and Comparative Examples 1-8

[0074] Using Example 3 as the control group, the performance differences and causes of Comparative Examples 1-8 are analyzed as follows: Comparative Example 1 (Graphene-boron nitride heterojunction-reinforced epoxy resin without graphene): The elasticity V50 value decreased from 690 m / s in Example 3 to 530 m / s, a decrease of 23.2%; the thermal conductivity decreased from 3.2 W·m. -1 ・K -1 Reduced to 0.25 W·m -1 ・K -1 The reduction was 92.2%; the back convex depth increased from 18mm to 35mm, an increase of 94.4%. The reason is that the lack of the "reinforcement-thermal conduction" dual effect of the heterojunction means that the resin cannot disperse the kinetic energy of the projectile, and the failure of heat dissipation leads to local overheating, resulting in a sharp drop in protection and buffering performance.

[0075] Comparative Example 2 (microcapsules without temperature-sensitive shear thickening fluid): The ballistic V50 value decreased from 690 m / s to 620 m / s, a decrease of 10.1%; the puncture resistance decreased from 980 N to 850 N, a decrease of 13.3%; and the back convexity depth increased from 18 mm to 28 mm, an increase of 55.6%. The reason is that the lack of dynamic buffering effect of shear thickening fluid prevents the rapid dispersion of impact stress, resulting in a decrease in ballistic resistance, puncture resistance, and buffering performance.

[0076] Comparative Example 3 (without silicon carbide whiskers): The puncture resistance decreased from 980N to 650N, a reduction of 33.7%, failing to meet the first-class standard of GB / T24586-2009. The reason is the lack of high rigidity support from the silicon carbide whiskers, allowing the puncture needle to easily penetrate the fiber gaps, thus rendering the core puncture resistance function ineffective.

[0077] Comparative Example 4 (Silica-free aerogel): Surface density from 3.7 kg / m³ 2 Increased to 4.3 kg / m 2 The increase was 16.2%; the thermal conductivity increased from 3.2 W·m. -1 ・K -1 Increased to 4.2 W·m -1 ・K -1 The increase was 31.3%. This is because aerogel lacks lightweight and heat insulation properties, resulting in increased vest weight and easier transfer of ambient heat into the vest.

[0078] Comparative Example 5 (without nano zinc oxide): The antibacterial rate decreased from 99.5% to 81.5%, a decrease of 18.1%. The reason is that the antibacterial effect of nano zinc oxide is lost, resulting in the proliferation of bacteria in the lining and the failure of its hygienic performance.

[0079] Comparative Example 6 (low hot-pressing temperature): The V50 value of the elasticity decreased from 690m / s to 610m / s, a decrease of 11.6%; the puncture resistance decreased from 980N to 830N, a decrease of 15.3%; and the back convexity depth increased from 18mm to 30mm, an increase of 66.7%. The reason is that insufficient temperature led to incomplete resin melting, resulting in voids at the fiber-matrix interface and weakened impact resistance.

[0080] Comparative Example 7 (low hot-pressing pressure): The ballistic V50 value decreased from 690m / s to 590m / s, a decrease of 14.5%; the stab resistance decreased from 980N to 800N, a decrease of 18.4%; and the back convexity depth increased from 18mm to 32mm, an increase of 77.8%. The reason is that insufficient pressure resulted in low density of the protective layer, with many internal pores, which could not effectively block projectiles / stabs.

[0081] Comparative Example 8 (without polyimide coating): Weather resistance strength retention decreased from 96.2% to 79.5%, a decrease of 17.4%. The reason is the lack of weather protection in the coating, with the protective layer directly exposed to ultraviolet light / humid heat, leading to accelerated aging.

[0082] In summary, the graphene-boron nitride heterostructure reinforces the epoxy resin and polyethylene filaments synergistically to improve elasticity and thermal conductivity; the temperature-sensitive shear-thickening liquid microcapsules, combined with thermoplastic polyurethane elastomers, enhance cushioning and flexibility; silicon carbide whiskers ensure core stab-resistant performance; and silica aerogel achieves lightweighting. The synergistic effect of these components gives the vest a combination of high protection, lightweight design, and durability.

[0083] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A full-protection tactical vest, characterized in that, It includes, from the outside in, an outer layer, a middle buffer layer, a core ballistic and stab-resistant layer, and an inner layer; it also includes a quick-release connection system and a modular mounting system. By weight, the core bulletproof and puncture-resistant layer comprises the following raw materials: 20-30 parts graphene-boron nitride heterostructure reinforced epoxy resin, 15-25 parts temperature-sensitive shear thickening liquid microcapsules, 25-35 parts polyethylene filament, 10-18 parts aramid 1414 chopped fibers, 6-12 parts silicon carbide whiskers, 4-8 parts silica aerogel, 8-15 parts thermoplastic polyurethane elastomer, 2-5 parts nano zinc oxide, 0.5-1.2 parts antioxidant, and 1-2 parts silane coupling agent.

2. The full-protection tactical vest according to claim 1, characterized in that, The weight-average molecular weight of polyethylene filament is 2.5-3.5 million g / mol, and the tensile strength is ≥3.8 GPa; the denier of aramid 1414 chopped fiber is 1000-1500D, and the weight-average molecular weight is 150,000-250,000 g / mol; the Shore hardness of thermoplastic polyurethane elastomer is 85-90A, and the weight-average molecular weight is 8000-20000 g / mol; the particle size of nano zinc oxide is 20-40 nm.

3. The full-protection tactical vest according to claim 1, characterized in that, The antioxidant is one or more of antioxidant 1010, antioxidant 168, antioxidant 1076, and antioxidant 264, and the silane coupling agent is one of KH-550 or KH-560.

4. The full-protection tactical vest according to claim 1, characterized in that, The raw materials for graphene-boron nitride heterostructure reinforced epoxy resin, by weight, include: 90-100 parts of epoxy resin E-51, 2-5 parts of graphene sheets, 3-6 parts of hexagonal boron nitride, 1-3 parts of KH-570, 25-35 parts of methyltetrahydrophthalic anhydride, and 100-150 parts of N,N-dimethylformamide; the number of graphene sheets is 3-5 layers, the particle size of hexagonal boron nitride is 50-100 nm, and the weight-average molecular weight of epoxy resin E-51 is 380-450 g / mol.

5. The full-protection tactical vest according to claim 4, characterized in that, The preparation method of graphene-boron nitride heterostructure reinforced epoxy resin includes the following steps: 1) Add graphene sheets and hexagonal boron nitride to N,N-dimethylformamide and ultrasonically disperse them for 40-60 min at a power of 500-700 W and a frequency of 38-40 kHz; add KH-570, heat to 80-90℃ and stir at 350-400 r / min for 3-4 h; then centrifuge at 8000-10000 r / min for 15-20 min, and then vacuum dry the obtained solid at 100-120℃ for 5-7 h to obtain graphene-hexagonal boron nitride heterojunction; 2) Heat epoxy resin E-51 to 60-70℃, add methyltetrahydrophthalic anhydride, stir at 600-900 r / min for 15-20 min, then add graphene-hexagonal boron nitride heterojunction, and continue stirring at this speed under a vacuum of -0.09~-0.10 MPa for 2-3 h, cool to room temperature, and obtain graphene-boron nitride heterojunction reinforced epoxy resin.

6. The full-protection tactical vest according to claim 4, characterized in that, By weight, the raw materials of the temperature-sensitive shear thickening liquid microcapsules include: 40-60 parts of polyethylene glycol 6000, 25-35 parts of nano silica, 15-25 parts of melamine-formaldehyde prepolymer, 2-4 parts of emulsifier OP-10, 0.5-1.0 parts of citric acid, and 80-120 parts of deionized water as the reaction medium; the phase transition temperature of polyethylene glycol 6000 is 38-42℃, the particle size of nano silica is 150-200nm, and the average particle size of the temperature-sensitive shear thickening liquid microcapsules is 10-20μm.

7. The full-protection tactical vest according to claim 6, characterized in that, The preparation method of temperature-sensitive shear-thickening fluid microcapsules includes the following steps: (1) After heating polyethylene glycol 6000 to 50-60℃ to melt, add nano silica and ball mill at 600-700 r / min for 1.5-2 h to obtain a homogeneous shear thickening liquid; (2) Add the shear thickening liquid and emulsifier OP-10 to deionized water, emulsify at 40-50℃ and 1200-1500r / min for 30-40min, then adjust the pH to 4.0-4.5 with citric acid, add melamine-formaldehyde prepolymer, heat to 50-60℃ and stir at 300-350r / min for 5-6h; after cooling to room temperature, centrifuge at 3500-4000r / min for 15-20min, wash with deionized water 3-5 times, and dry at 80-90℃ for 4-6h to obtain temperature-sensitive shear thickening liquid microcapsules.

8. The full-protection tactical vest according to claim 6, characterized in that, The outer layer is made of 600D Cordura abrasion-resistant fabric; the middle cushioning layer is an EVA foam cushioning layer with a thickness of 7-11mm and a density of 0.3-0.5g / cm³. 3 The inner layer is an antibacterial and skin-friendly lining containing 0.2-0.4wt% nano-silver with an antibacterial rate of ≥99.5%; the webbing spacing of the modular mounting system is 20-25mm.

9. The full-protection tactical vest according to claim 6, characterized in that, The quick-release connection system includes a double-safety carbon fiber modified nylon quick-release buckle for the shoulder strap, an adjustable quick-release structure for the waist webbing, and a steel cable linkage device; the nylon quick-release buckle has a carbon fiber content of 15-20wt%, a silicon carbide particle content of 5-8wt%, and a fastening strength of ≥2200N.

10. A method for manufacturing a full-protection tactical vest according to any one of claims 6-9, characterized in that, Includes the following steps: S1. Preparation of the core ballistic and stab-resistant layer: S11. Fiber pretreatment: Place polyethylene filament and aramid 1414 chopped fiber in an oven at 100-120℃ and dry for 3-4 hours. Then soak silicon carbide whiskers in a 5-8wt% silane coupling agent ethanol solution for 2-3 hours, and then dry at 110-130℃ for 2-3 hours. S12. Mixing and Impregnation: Pretreated polyethylene filaments, aramid 1414 chopped fibers, silicon carbide whiskers, silica aerogel, nano zinc oxide, and antioxidants are added to a high-speed mixer and mixed at 1500-2000 r / min for 50-70 min. Then, graphene-boron nitride heterostructure reinforced epoxy resin and thermoplastic polyurethane elastomer are added and stirred at 800-1200 r / min for 30-40 min. Finally, temperature-sensitive shear thickening liquid microcapsules are added and stirred at 300-500 r / min for 15-20 min to obtain a uniform slurry. S13. Hot pressing: The slurry obtained in S12 is poured into a customized mold, placed in a hot press, and the temperature is controlled at 160-190℃, the pressure at 15-25MPa, and the time at 40-60min. After cooling to room temperature, a bulletproof and puncture-resistant sheet with a thickness of 4-8mm is obtained. S14. Post-processing: Use a fiber laser cutting system to trim the dimensions of the sheet material, control the power to be 1200-1500W, the speed to be 3-6m / min, and the auxiliary gas to be nitrogen; spray a 100-150μm thick polyimide coating on the surface of the sheet material, and then cure it at 160-180℃ for 2-3 hours. S2. Overall assembly: S21. Material pretreatment: Place the outer fabric, bulletproof and stab-resistant plate, and middle buffer layer in an environment with a temperature of 23±2℃ and a relative humidity of 50±5% for 24 hours. S22, Precision Laser Cutting: Using a fiber laser cutting system to cut each layer of material; S23, Buffer layer composite: The intermediate buffer layer is bonded to the bulletproof and puncture-resistant plate with EVA hot melt adhesive, with the temperature controlled at 130-150℃, the pressure at 10-15MPa, and the time at 50-70s. S24. Quick-release system installation: The shoulder strap quick-release buckle is positioned and installed using a special template machine, with a riveting strength ≥1800N; the waist steel cable channel is made of heat-melt bonding and double-thread chain stitching. S25, Modular sewing: Sewing is done using a fully automatic computerized pattern sewing machine; S26. Overall Assembly and Testing: The front vest body, back vest body, shoulder straps and waist belt are assembled by a three-dimensional template machine, and a steel cable quick-release system is integrated.

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