A skin material for armored vehicles, its preparation method and application

Abstract

This invention belongs to the field of skin material technology, specifically relating to an armored vehicle skin material and its preparation method and application. The preparation method of the armored vehicle skin material includes the following steps: (1) preparing a TPU solution and a functional filler dispersion; (2) adding the functional filler dispersion to the TPU solution and mixing evenly to obtain a spinning solution; (3) cutting the aromatic carbon blended fabric into samples suitable for the receiver size; subjecting the aromatic carbon blended fabric to plasma treatment to obtain a plasma-treated aromatic carbon blended fabric; (4) fixing the plasma-treated aromatic carbon blended fabric onto an electrospinning receiver, and using the spinning solution to perform electrospinning on the surface of the plasma-treated aromatic carbon blended fabric to obtain the armored vehicle skin material. The skin material of this invention possesses stealth performance and excellent mechanical properties at different temperatures, solving the technical problems of armored vehicle skin materials in the prior art.

Description

Technical Field

[0001] This invention belongs to the field of skin material technology, specifically relating to a skin material for armored vehicles, its preparation method, and its application. Background Technology

[0002] Traditional armor materials primarily rely on metals and ceramics. These materials are dense and heavy, and often suffer irreversible damage and deformation after external penetration, making them unsuitable for meeting the dual demands of modern warfare for lightweight construction and high protective performance. In contrast, high-performance fiber composite materials, due to their comprehensive advantages such as lightweight, high strength, high modulus, and high designability, have become a hot topic in current armor material research. Their protective mechanism mainly relies on the material absorbing a large amount of energy during plastic deformation and fracture upon impact, thereby effectively resisting fragments and blast waves, and therefore are widely used in the field of military equipment.

[0003] In existing technologies, high-performance fiber composite skins are typically constructed by bonding multiple layers of material together using adhesives or hot pressing. For example, the study "Preparation and Bending Performance Research of Three-Dimensional Shallow-Bending Kevlar / EP Armor Material" found that when the adhesive content is in the range of 42%-49%, the bending strength of the armor material exhibits a trend of "first increasing and then decreasing" with increasing adhesive content. Existing high-performance fiber composite materials inevitably introduce a large number of interlayer interfaces. These interfaces are prone to becoming stress concentration areas under high-speed impact or explosive loads, significantly weakening the overall mechanical properties of the material. In particular, existing military equipment skins often focus on a single stealth function or only consider room-temperature mechanical properties. However, armored vehicles need to operate in various extreme climates around the world, from scorching deserts to frigid polar regions, and their surface skin materials will face severe challenges.

[0004] Therefore, developing a skin material that can maintain excellent and stable mechanical strength and stealth performance when subjected to large temperature fluctuations has become an urgent need to improve the environmental adaptability of equipment. Summary of the Invention

[0005] The purpose of this invention is to provide a skin material for armored vehicles, its preparation method, and its application.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A method for preparing a skin material for armored vehicles includes the following steps:

[0008] (1) Add thermoplastic polyurethane to a mixed solvent of N,N-dimethylformamide and tetrahydrofuran to obtain a TPU solution; disperse silver nanowires in isopropanol to obtain a silver nanowire isopropanol dispersion; add hydrophobically modified nano-SiO2 to the silver nanowire isopropanol dispersion and ultrasonically disperse to obtain a functional filler dispersion.

[0009] (2) Add functional filler dispersion to TPU solution and mix evenly to obtain spinning solution;

[0010] (3) Cut the aramid carbon blended fabric into a sample suitable for the size of the receiver; subject the aramid carbon blended fabric to plasma treatment to obtain plasma-treated aramid carbon blended fabric;

[0011] (4) The plasma-treated aromatic carbon blended fabric is fixed on the electrospinning receiver, and electrospinning is performed on the surface of the plasma-treated aromatic carbon blended fabric using spinning solution to obtain the skin material for armored vehicles.

[0012] Preferably, the thermoplastic polyurethane includes thermoplastic polyurethane A of type 1185A, thermoplastic polyurethane B of type 670AWHU, and thermoplastic polyurethane C of type 2586A.

[0013] Preferably, the thermoplastic polyurethane comprises thermoplastic polyurethane A of type 1185A, thermoplastic polyurethane B of type 670AWHU, and thermoplastic polyurethane C of type 2586A in a mass ratio of (1.3-1.5):(0.4-0.6):(0.8-1.0).

[0014] This invention improves the tensile properties of skin materials at room temperature by using different types of thermoplastic polyurethane. It was also found that when the above components are mixed in a specific ratio, the tensile properties of the skin material at high temperatures can be improved. Analysis suggests that under these conditions, the hard and soft segments of the thermoplastic polyurethane can be better controlled. When they are blended in the optimal ratio, hard segments from different sources can interpenetrate and reinforce each other, forming a denser and more uniformly distributed physical cross-linked network.

[0015] Preferably, the hydrophobically modified nano-SiO2 includes a first nano-SiO2 and a second nano-SiO2; the first nano-SiO2 is modified fumed silica with active groups after being modified by a special silane; the second nano-SiO2 is hydrophobic fumed silica modified by hexamethyldisilazane.

[0016] Preferably, the first nano-SiO2 is of type HB-701.

[0017] Preferably, the second nano-SiO2 is of type HB-132.

[0018] This invention utilizes a specific type of hydrophobically modified nano-SiO2, which not only helps optimize the impedance matching characteristics of the material surface but also improves the low-temperature performance of the skin material. Analysis shows that under these conditions, nano-SiO2 can be more uniformly dispersed in TPU, avoiding stress defects caused by agglomeration. The hydrophobic SiO2 and TPU molecular chains can form a tight and strong interfacial bond, thereby improving low-temperature resistance.

[0019] Preferably, the hydrophobically modified nano-SiO2 accounts for 4-6% of the mass of the thermoplastic polyurethane.

[0020] Preferably, the mixed solvent comprises N,N-dimethylformamide and tetrahydrofuran.

[0021] The armored vehicle skin material prepared by the aforementioned method.

[0022] The application of the armored vehicle skin material prepared by the aforementioned method in the manufacture of armored vehicles.

[0023] Compared with the prior art, the advantages and beneficial effects of the present invention are as follows:

[0024] 1. This invention utilizes a specific ratio of various thermoplastic polyurethanes in synergistic effects, along with the addition of specific types of nano-silica, combined with aryl carbon hybrid woven fabric. This significantly improves the structural reliability and service life of the skin material in extreme environments. Plasma treatment of the aryl carbon hybrid woven fabric substrate greatly enhances its interfacial bonding with the functional fiber layer, avoiding the risk of delamination.

[0025] 2. The armored vehicle skin material provided by this invention exhibits excellent radar stealth performance. Uniformly dispersed silver nanowires within the polymer fibers construct a three-dimensional conductive network, effectively dissipating radar wave electromagnetic energy through conductive losses. A specific proportion of hydrophobically modified nano-SiO2 not only acts as a dielectric modifier, optimizing the impedance matching characteristics of the material surface and making radar waves more easily incident rather than reflected, but also forms numerous heterogeneous interfaces with the silver nanowires and polymer matrix, inducing significant interfacial polarization relaxation losses, further converting electromagnetic energy into heat energy. Furthermore, the fiber structure constructed through electrospinning causes radar waves to undergo multiple scattering and reflections within the material, greatly extending their propagation path and thus improving energy attenuation efficiency. Through the synergistic effect of multiple loss mechanisms, this skin material achieves efficient absorption and scattering of radar waves, significantly reducing the target's radar cross-section, thereby achieving excellent radar stealth performance. Detailed Implementation

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and 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.

[0027] All raw materials used in the following embodiments of the present invention are commercially available products:

[0028] Thermoplastic polyurethane A, model 1185A, brand: BASF, supplier: Dongguan Zhanyu Plastic Raw Materials Co., Ltd.

[0029] Thermoplastic polyurethane B, model 670AWHU, brand: BASF, supplier: Xiamen Qianren Plastics Import & Export Co., Ltd.

[0030] Thermoplastic polyurethane C, model 2586A, brand: Covestro, supplier: Xiamen Qianren Plastics Import & Export Co., Ltd.

[0031] Aromatic carbon blend woven fabric, model SJ3K-CAP5.5. Jiangsu Shunju Carbon Fiber Products Co., Ltd.

[0032] Silver nanowires, AgNWs, 20nm in diameter, 10μm in length, model AgNW0020, Beijing Deco Island Gold Technology Co., Ltd.

[0033] Example 1

[0034] This embodiment provides a skin material for armored vehicles, the preparation method of which includes the following steps:

[0035] (1) Under stirring at 300 rpm, 30 g of thermoplastic polyurethane was added to 270 mL of a mixed solvent of N,N-dimethylformamide and tetrahydrofuran with a volume ratio of 1:1. The thermoplastic polyurethane included thermoplastic polyurethane A of model 1185A, thermoplastic polyurethane B of model 670AWHU, and thermoplastic polyurethane C of model 2586A with a mass ratio of 1.4:0.5:0.9. Under a nitrogen atmosphere, the mixture was heated to 50 °C and stirred continuously at 400 rpm for 4 h to obtain a TPU solution. Silver nanowires were dispersed in isopropanol to obtain a silver nanowire isopropanol dispersion with a concentration of 5 mg / mL. 1.5 g of hydrophobically modified nano SiO2 was added to the silver nanowire isopropanol dispersion and ultrasonically dispersed for 15 min at a power of 200 W in a working mode of ultrasonic for 2 seconds followed by an interval of 2 seconds to obtain a functional filler dispersion.

[0036] (2) Stir the TPU solution at 200 rpm at room temperature, add the functional filler dispersion in three batches, and after all the filling is done, place it in an ice water bath and ultrasonically disperse it at 150W for 10 min. The working mode is: ultrasonic for 2 seconds, intermittent for 2 seconds to obtain a mixture. Seal the mixture and place it on a magnetic stirrer. Stir continuously at 250 rpm for 8 h at room temperature and in the dark to obtain the spinning solution.

[0037] (3) Cut the aryl carbon blended fabric into a sample suitable for the size of the receiver; clean the aryl carbon blended fabric in acetone and anhydrous ethanol by ultrasonication for 15 min, and dry it in a vacuum drying oven at 60℃ for 2 h. Place the dried aryl carbon blended fabric in the plasma reaction chamber, introduce the treatment gas oxygen, and after the flow rate stabilizes, start the radio frequency power supply to generate glow discharge. The power is 150W, the treatment gas pressure is 30Pa, the gas flow rate is 50sccm, and the treatment time is 100s to obtain the plasma-treated aryl carbon blended fabric.

[0038] (4) The plasma-treated aromatic carbon blended fabric was fixed on the electrospinning receiver. The spinning solution was electrospinned at room temperature of 25°C and relative humidity of 40%. The distance between the needle and the rotating roller receiver was adjusted to 18cm. The roller speed was set to 300rpm. The injection pump was started and the feed rate was set to 1.0mL / h. After the droplets flowed out of the needle tip stably, the high voltage power supply was turned on and a positive high voltage of 18kV was applied to the needle. The receiving roller was grounded (0kV). The receiving distance was 18cm and the spinning thickness was 300μm. After spinning, the composite fiber material was obtained. The composite fiber material was peeled off from the receiver and placed in a vacuum drying oven at 60°C for 12h to obtain the skin material for armored vehicles.

[0039] The hydrophobically modified nano-SiO2 comprises a first nano-SiO2 and a second nano-SiO2 in a mass ratio of 1:0.6. The first nano-SiO2 is modified fumed silica with active groups obtained through special silane modification, model HB-701, manufactured by Hubei Huifu Nanomaterials Co., Ltd. The second nano-SiO2 is a hydrophobic fumed silica obtained through deep treatment with hexamethyldisilazane (HMDS), model HB-132, also manufactured by Hubei Huifu Nanomaterials Co., Ltd.

[0040] Example 2

[0041] This embodiment provides a skin material for armored vehicles, the preparation method of which includes the following steps:

[0042] (1) Under stirring at 300 rpm, 30 g of thermoplastic polyurethane was added to 270 mL of a mixed solvent of N,N-dimethylformamide and tetrahydrofuran in a volume ratio of 1:1. The thermoplastic polyurethane included thermoplastic polyurethane A of type 1185A, thermoplastic polyurethane B of type 670AWHU, and thermoplastic polyurethane C of type 2586A in a mass ratio of 1.3:0.6:0.8. Under a nitrogen atmosphere, the mixture was heated to 50 °C and stirred continuously at 400 rpm for 4 h to obtain a TPU solution. Silver nanowires were dispersed in isopropanol to obtain a silver nanowire isopropanol dispersion with a concentration of 5 mg / mL. 1.5 g of hydrophobically modified nano-SiO2 was added to the silver nanowire isopropanol dispersion and ultrasonically dispersed for 15 min at a power of 200 W in a working mode of ultrasonic for 2 seconds followed by an interval of 2 seconds to obtain a functional filler dispersion.

[0043] (2) Stir the TPU solution at 200 rpm at room temperature, add the functional filler dispersion in three batches, and after all the filling is done, place it in an ice water bath and ultrasonically disperse it at 150W for 10 min. The working mode is: ultrasonic for 2 seconds, intermittent for 2 seconds to obtain a mixture. Seal the mixture and place it on a magnetic stirrer. Stir continuously at 250 rpm for 8 h at room temperature and in the dark to obtain the spinning solution.

[0044] (3) Cut the aryl carbon blended fabric into a sample suitable for the size of the receiver; clean the aryl carbon blended fabric in acetone and anhydrous ethanol by ultrasonication for 15 min, and dry it in a vacuum drying oven at 60℃ for 2 h. Place the dried aryl carbon blended fabric in the plasma reaction chamber, introduce the treatment gas oxygen, and after the flow rate stabilizes, start the radio frequency power supply to generate glow discharge. The power is 150W, the treatment gas pressure is 30Pa, the gas flow rate is 50sccm, and the treatment time is 100s to obtain the plasma-treated aryl carbon blended fabric.

[0045] (4) The plasma-treated aromatic carbon blended fabric was fixed on the electrospinning receiver. The spinning solution was electrospinned at room temperature of 25°C and relative humidity of 40%. The distance between the needle and the rotating roller receiver was adjusted to 18cm. The roller speed was set to 300rpm. The injection pump was started and the feed rate was set to 1.0mL / h. After the droplets flowed out of the needle tip stably, the high voltage power supply was turned on and a positive high voltage of 18kV was applied to the needle. The receiving roller was grounded (0kV). The receiving distance was 18cm and the spinning thickness was 300μm. After spinning, the composite fiber material was obtained. The composite fiber material was peeled off from the receiver and placed in a vacuum drying oven at 60°C for 12h to obtain the skin material for armored vehicles.

[0046] The hydrophobically modified nano-SiO2 comprises a first nano-SiO2 and a second nano-SiO2 in a mass ratio of 1:0.5. The first nano-SiO2 is modified fumed silica with active groups obtained through special silane modification, model HB-701, manufactured by Hubei Huifu Nanomaterials Co., Ltd. The second nano-SiO2 is a hydrophobic fumed silica obtained through deep treatment with hexamethyldisilazane (HMDS), model HB-132, also manufactured by Hubei Huifu Nanomaterials Co., Ltd.

[0047] Example 3

[0048] This embodiment provides a skin material for armored vehicles, the preparation method of which includes the following steps:

[0049] (1) Under stirring at 300 rpm, 30 g of thermoplastic polyurethane was added to 270 mL of a mixed solvent of N,N-dimethylformamide and tetrahydrofuran with a volume ratio of 1:1. The thermoplastic polyurethane included thermoplastic polyurethane A of model 1185A, thermoplastic polyurethane B of model 670AWHU, and thermoplastic polyurethane C of model 2586A with a mass ratio of 1.5:0.4:1.0. Under a nitrogen atmosphere, the mixture was heated to 50 °C and stirred continuously at 400 rpm for 4 h to obtain a TPU solution. Silver nanowires were dispersed in isopropanol to obtain a silver nanowire isopropanol dispersion with a concentration of 5 mg / mL. 1.5 g of hydrophobically modified nano SiO2 was added to the silver nanowire isopropanol dispersion and ultrasonically dispersed for 15 min at a power of 200 W in a working mode of ultrasonic for 2 seconds followed by an interval of 2 seconds to obtain a functional filler dispersion.

[0050] (2) Stir the TPU solution at 200 rpm at room temperature, add the functional filler dispersion in three batches, and after all the filling is done, place it in an ice water bath and ultrasonically disperse it at 150W for 10 min. The working mode is: ultrasonic for 2 seconds, intermittent for 2 seconds to obtain a mixture. Seal the mixture and place it on a magnetic stirrer. Stir continuously at 250 rpm for 8 h at room temperature and in the dark to obtain the spinning solution.

[0051] (3) Cut the aryl carbon blended fabric into a sample suitable for the size of the receiver; clean the aryl carbon blended fabric in acetone and anhydrous ethanol by ultrasonication for 15 min, and dry it in a vacuum drying oven at 60℃ for 2 h. Place the dried aryl carbon blended fabric in the plasma reaction chamber, introduce the treatment gas oxygen, and after the flow rate stabilizes, start the radio frequency power supply to generate glow discharge. The power is 150W, the treatment gas pressure is 30Pa, the gas flow rate is 50sccm, and the treatment time is 100s to obtain the plasma-treated aryl carbon blended fabric.

[0052] (4) The plasma-treated aromatic carbon blended fabric was fixed on the electrospinning receiver. The spinning solution was electrospinned at room temperature of 25°C and relative humidity of 40%. The distance between the needle and the rotating roller receiver was adjusted to 18cm. The roller speed was set to 300rpm. The injection pump was started and the feed rate was set to 1.0mL / h. After the droplets flowed out of the needle tip stably, the high voltage power supply was turned on and a positive high voltage of 18kV was applied to the needle. The receiving roller was grounded (0kV). The receiving distance was 18cm and the spinning thickness was 300μm. After spinning, the composite fiber material was obtained. The composite fiber material was peeled off from the receiver and placed in a vacuum drying oven at 60°C for 12h to obtain the skin material for armored vehicles.

[0053] The hydrophobically modified nano-SiO2 comprises a first nano-SiO2 and a second nano-SiO2 in a mass ratio of 1:0.7. The first nano-SiO2 is modified fumed silica with active groups obtained through special silane modification, model HB-701, manufactured by Hubei Huifu Nanomaterials Co., Ltd. The second nano-SiO2 is a hydrophobic fumed silica obtained through deep treatment with hexamethyldisilazane (HMDS), model HB-132, also manufactured by Hubei Huifu Nanomaterials Co., Ltd.

[0054] Comparative Example 1

[0055] The difference between this comparative example and Example 1 is that the thermoplastic polyurethane is thermoplastic polyurethane A of type 1185A.

[0056] Comparative Example 2

[0057] The difference between this comparative example and Example 1 is that the thermoplastic polyurethane includes thermoplastic polyurethane A of type 1185A and thermoplastic polyurethane B of type 670AWHU in a mass ratio of 1.4:0.5.

[0058] Comparative Example 3

[0059] The difference between this comparative example and Example 1 is that the thermoplastic polyurethane includes thermoplastic polyurethane A of type 1185A, thermoplastic polyurethane B of type 670AWHU, and thermoplastic polyurethane C of type 2586A in a mass ratio of 1:0.8:0.3.

[0060] Comparative Example 4

[0061] The difference between this comparative example and Example 1 is that the hydrophobically modified nano-SiO2 is modified fumed silica with active groups after being modified by special silane, model HB-701, manufactured by Hubei Huifu Nanomaterials Co., Ltd.

[0062] Comparative Example 5

[0063] The difference between this comparative example and Example 1 is that the hydrophobically modified nano-SiO2 is a hydrophobic fumed silica that has been deeply treated with hexamethyldisilazane (HMDS), model HB-132, manufactured by Hubei Huifu Nanomaterials Co., Ltd.

[0064] Comparative Example 6

[0065] The difference between this comparative example and Example 1 is that the hydrophobically modified nano-SiO2 includes a first nano-SiO2 and a second nano-SiO2 in a mass ratio of 0.6:1. The first nano-SiO2 is modified fumed silica with active groups after being modified with a special silane, model HB-701, manufactured by Hubei Huifu Nanomaterials Co., Ltd. The second nano-SiO2 is a hydrophobic fumed silica after being deeply treated with hexamethyldisilazane (HMDS), model HB-132, also manufactured by Hubei Huifu Nanomaterials Co., Ltd.

[0066] Performance testing

[0067] The performance of the skin materials prepared in Examples 1-3 and Comparative Examples 1-6 was tested.

[0068] 1. Tensile properties and peel properties were tested using a CMT4304 microcomputer-controlled universal testing machine. Tensile strength was measured at 25℃, 80℃, and -30℃.

[0069] 2. Referring to GJB 2038A-2011 "Test Method for Reflectivity of Radar Absorbing Materials", the bow-shaped method was used to determine the reflection loss of the skin material in the X-band (8 GHz, 12 GHz). , where Pr is the reflected power and Pi is the incident power.

[0070] The test results are shown in Table 1.

[0071] Table 1 Performance Test Results

[0072]

[0073] As shown in Table 1, Examples 1-3 exhibit excellent mechanical properties at different temperatures, and also demonstrate better reflection loss performance.

[0074] In Comparative Example 1, the single TPU microphase separation structure is simple, resulting in an imbalance in the high and low temperature performance of the skin material; at the same time, it leads to insufficient electromagnetic parameter adjustment capability.

[0075] In Comparative Examples 2 and 3, the formulation of thermoplastic polyurethane disrupted the optimal hard / soft segment conformation, resulting in a decrease in overall performance.

[0076] Comparative Examples 4-6 illustrate that the specific ratio of two types of nano-silica, and the combination of two nano-SiO2 with different surface chemistry properties, is not a simple functional superposition, but rather produces a synergistic effect. This enhances interfacial bonding and polarization capabilities, thereby improving radar electromagnetics and microwave absorption performance. The active reactive groups introduced onto the surface of the first nano-SiO2 can form strong hydrogen bonds with the -NCO in the TPU molecular chain, creating a robust and strongly polar connection. This strengthens the hard segment micro-regions of TPU, increasing the material's modulus and strength. Especially at high temperatures, these bonding points remain stable. Simultaneously, the strong interaction with TPU and AgNWs creates stronger charge accumulation and redistribution at the interface, significantly enhancing interfacial polarization—a crucial radar wave loss mechanism. After being treated with HMDS, the second nano-SiO2 has an inert and non-polar trimethylsiloxane group on its surface, which can effectively prevent its tendency to agglomerate in organic solvents and hydrophobic TPU matrix, ensuring that the nanoparticles are uniformly dispersed in the form of individual particles. At the same time, the organic long chains on its surface act as spacers between TPU molecular chains, increasing the mobility of the molecular chains. The two are combined in the best ratio, so that the material has both high strength and good toughness over a wide temperature range, achieving a balance between strength and toughness.

[0077] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for the production of a skin material for an armoured vehicle, characterised in that, The method comprises the following steps: (1) adding the thermoplastic polyurethane into a mixed solvent to obtain a TPU solution; adding hydrophobic modified nano-SiO2 into the silver nanowire isopropanol dispersion to obtain a functional filler dispersion; (2) adding the functional filler dispersion into the TPU solution and mixing uniformly to obtain a spinning solution; (3) performing plasma treatment on the aramid / carbon hybrid woven fabric to obtain a pretreated aramid / carbon hybrid woven fabric; (4) fixing the pretreated aramid / carbon hybrid woven fabric on an electrospinning receiver and performing electrospinning on the surface of the pretreated aramid / carbon hybrid woven fabric using the spinning solution to obtain the skin material for armored vehicles; The thermoplastic polyurethane comprises thermoplastic polyurethane A of model 1185A, thermoplastic polyurethane B of model 670AWHU and thermoplastic polyurethane C of model 2586A in a mass ratio of (1.3-1.5):(0.4-0.6):(0.8-1.0); The hydrophobic modified nano-SiO2 comprises first nano-SiO2 and second nano-SiO2 in a weight ratio of 1:0.5-0.7; the first nano-SiO2 is modified fumed silica modified by silane and has a model of HB-701; the second nano-SiO2 is hydrophobic fumed silica modified by hexamethyldisilazane and has a model of HB-132; The hydrophobic modified nano-SiO2 accounts for 4-6% of the mass of the thermoplastic polyurethane.

2. The method of producing a skin material for an armored vehicle according to claim 1, characterized in that, The mixed solvent comprises N,N-dimethylformamide and tetrahydrofuran.

3. The skin material for armored vehicles prepared by the preparation method of any one of claims 1-2.

4. Application of the skin material for armored vehicles prepared by the preparation method of any one of claims 1-2 in the preparation of armored vehicles.

Images