Lightweight multi-environment adaptive individual explosion-proof composite material as well as preparation and application thereof

Abstract

The invention relates to a lightweight multi-environment adaptive individual explosion-proof composite material and preparation and application thereof, the composite material comprises a first impact-resistant surface layer, a second impact-resistant surface layer and an energy absorption layer arranged between the first impact-resistant surface layer and the second impact-resistant surface layer, and an energy absorption crack arrest layer is further arranged between the first impact-resistant surface layer and the energy absorption layer. According to the explosion-proof material, the design of a traditional explosion-proof material with a single structure is improved, and the technical problems that an existing material is thick and heavy in structure, poor in impact resistance, low in energy absorption efficiency, poor in durability and the like are solved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of explosion-proof materials, and particularly relates to a lightweight multi-environmental individual explosion-proof composite material and preparation and application thereof. BACKGROUND

[0002] With the increasing complexity of working environment and the increasing potential risk factors, the demand for explosion-proof and impact-resistant functional materials continues to grow, especially in the field of personal protection materials and equipment, to effectively protect the life safety of workers and reduce the risk of injury caused by external load impact, which has become a key issue that needs to be addressed. Especially in special application scenarios such as underwater explosion impact, due to the impact strength being much higher than that on land, the explosion-proof performance and environmental adaptability of the protective material are put forward with more stringent requirements. However, the existing widely used protective materials still have technical bottlenecks in energy absorption efficiency, water environment adaptability and long-term dynamic durability. At the same time, the thick structure of the existing explosion-proof composite material also makes it difficult to adapt to the lightweight and practical development trend of personalized protective equipment for the human body.

[0003] In addition, extreme environments (such as underwater) have a negative impact on the mechanical properties and dynamic explosion-proof and impact-resistant performance of the material, which is manifested as a significant decline in material strength, elastic modulus, energy absorption capacity and durability. However, the existing protective materials usually lack effective design and processing technology, and cannot simultaneously consider lightweight, impact protection capability and underwater environmental durability, resulting in insufficient protection efficiency in complex working environments and limited application fields. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a lightweight multi-environmental individual explosion-proof composite material and preparation and application thereof, aiming to solve the problems of low energy absorption efficiency under impact load, unsuitability for underwater impact environment and poor dynamic durability of the existing explosion-proof materials in lightweight design.

[0005] The present application provides an explosion-proof composite material, which comprises a first impact-resistant surface layer, a second impact-resistant surface layer and an energy absorption layer arranged between the first and second impact-resistant surface layers, wherein an energy absorption and crack arrest layer is further arranged between the first impact-resistant surface layer and the energy absorption layer.

[0006] The energy absorption layer is a high-toughness energy absorption layer; and the energy absorption and crack arrest layer is a bionic energy absorption and crack arrest layer.

[0007] Preferably, the first and second impact-resistant surface layers are made of carbon fiber cloth prepreg lay-up.

[0008] Preferably, the energy absorption and crack arrest layer comprises a hard impact-resistant material and a soft energy absorption material.

[0009] Preferably, the energy-absorbing layer comprises a foam material, wherein the foam material has a cylindrical cavity and a metal spring support structure is provided inside the cavity.

[0010] The soft energy-absorbing material and the foam material in the energy-absorbing layer both have a density of 0.2–1 g / cm³. 3 The closed-cell foam structure.

[0011] Preferably, in the energy-absorbing and crack-resistant layer, the rigid impact-resistant material includes carbon fiber laminate; the soft energy-absorbing material includes polyurethane foam.

[0012] Furthermore, the carbon fiber laminate is a laminate made of epoxy resin carbon fiber cloth prepreg with [0,90] layers.

[0013] Preferably, the foam material in the energy-absorbing layer includes polyurethane foam material.

[0014] The wave impedance of the polyurethane foam material is 0.1 to 1.5 MPa·s / m.

[0015] Preferably, the hard impact-resistant material and the soft energy-absorbing material in the energy-absorbing and crack-preventing layer are laid in parallel and alternately; wherein the width ratio of the hard impact-resistant material to the soft energy-absorbing material is 1:1 to 1:5.

[0016] Furthermore, the energy-absorbing crack-preventing layer structure: the energy-absorbing crack-preventing layer is provided with several spaced soft energy-absorbing material layers, each of the soft energy-absorbing material layers is divided into several spaced soft energy-absorbing material blocks, and the gaps between the soft energy-absorbing material blocks are filled with hard impact-resistant material.

[0017] The energy-absorbing crack-preventing layer structure is similar to a brick masonry structure.

[0018] Preferably, the energy-absorbing layer is provided with a plurality of functional units, wherein each functional unit includes a cylindrical cavity and a metal spring support structure inside the cavity; wherein the ratio of the cavity diameter to the length of the functional unit is 1:4 to 3:4, the wire diameter of the metal spring support structure is 0.3 to 0.7 mm, and the inner diameter is 3 to 9 mm.

[0019] Preferably, the thickness of the composite material is 10-25 mm; the thickness of the first impact-resistant surface layer is 1-4 mm; the thickness of the energy-absorbing and crack-inhibiting layer is 1-4 mm; the thickness of the energy-absorbing layer is 8-15 mm; and the thickness of the second impact-resistant surface layer is 1-4 mm.

[0020] The first impact-resistant surface layer, the biomimetic energy-absorbing and crack-preventing layer, the (high-toughness) energy-absorbing layer, and the second impact-resistant surface layer are integrally formed by hot-pressing with a thermosetting resin as an adhesive, wherein the thermosetting resin is epoxy resin.

[0021] This invention provides a method for preparing explosion-proof composite materials, comprising:

[0022] (1) Preparation of the first and second impact-resistant surface layers:

[0023] Epoxy resin carbon fiber cloth prepreg is laid according to the set layup method, and the whole is cured and molded into carbon fiber laminate to obtain the first and second impact-resistant surface layers.

[0024] (2) Hard impact-resistant materials and soft energy-absorbing materials are spliced ​​together and integrally formed by hot pressing process to obtain an energy-absorbing crack-preventing layer.

[0025] (3) The closed-cell foam material is opened according to the predetermined structural parameters to form several cylindrical cavity structures. Then, the metal spring support structure is filled into each cylindrical cavity of the closed-cell foam material to obtain an energy-absorbing layer.

[0026] (4) The first impact-resistant surface layer, the energy-absorbing crack-stopping layer, the energy-absorbing layer and the second impact-resistant surface layer are stacked sequentially from the outside to the inside, and the materials of each layer are tightly bonded to obtain the explosion-proof composite material.

[0027] In step (1), the layup method is to lay the epoxy resin carbon fiber cloth prepreg according to the [0,90] layup method; the overall curing and molding method is vacuum hot pressing molding.

[0028] In step (1), the epoxy resin carbon fiber cloth prepreg is a multi-layered preform, which is then hot-pressed in one step.

[0029] In step (2), the hard impact-resistant material and soft energy-absorbing material are used for splicing and combining: a three-dimensional model of the energy-absorbing and crack-stopping layer structure is established using three-dimensional modeling software according to the predetermined structural parameters. The hard material and soft material parts in the established three-dimensional model are saved as model files respectively. The model files of the hard material and soft material are imported into an automated engraving machine, and the hard material and soft material of the predetermined thickness are cut to obtain the desired results.

[0030] In step (2), an adhesive is used in the hot pressing process for integral molding, wherein the adhesive is epoxy resin.

[0031] The methods for tightly bonding the layers of material in step (4) include hot pressing or vacuum forming.

[0032] In step (4), epoxy resin adhesive and hot pressing process are used to seal the edges of the explosion-proof composite material, thus obtaining a waterproof individual explosion-proof composite material.

[0033] This invention provides an application of any of the explosion-proof composite materials described herein as protective materials in land and underwater explosion environments, such as as human protective materials.

[0034] The protective composite material of the present invention is lightweight, has high energy absorption efficiency, excellent impact resistance, and good durability.

[0035] Based on the principle of multi-structure configuration and multi-material synergistic effect of composite materials, this invention designs and develops a multi-level explosion-proof composite material with a high-strength impact-resistant surface layer, a biomimetic energy-absorbing crack-arresting layer, a high-toughness energy-absorbing layer, and a high-strength impact-resistant surface layer.

[0036] Advantages

[0037] This invention, based on the principle of synergistic effect of multiple structural configurations and multiple materials, combines a high-strength impact-resistant surface layer, a biomimetic energy-absorbing crack-arresting layer, a high-toughness energy-absorbing layer, and a high-strength impact-resistant surface layer. This results in a composite material that not only possesses excellent impact resistance and efficiently absorbs impact energy, effectively resisting multiple impacts and extending its service life, but also incorporates lightweight design requirements, providing reliable support for improving the overall impact protection performance of the composite material.

[0038] This invention employs a vacuum hot-pressing composite process with precisely controlled parameters to achieve high-strength interfacial bonding between the functional material layers, reducing the risk of delamination and damage during use. Furthermore, by sealing the edges of the composite structure with epoxy resin, the overall waterproofness of the material is further enhanced, enabling it to maintain stable mechanical properties and excellent dynamic impact resistance in underwater environments, preventing performance degradation caused by moisture penetration. This composite material not only exhibits good impact protection in terrestrial environments but is also suitable for protective applications in extreme conditions such as underwater explosion protection.

[0039] The composite material of this invention is significantly lighter and thinner than traditional protective materials. While meeting the protective performance requirements, it also takes into account the dynamic activity performance requirements of the human body. Especially when used in protective clothing and protective equipment, its weight, thickness and structural configuration can be flexibly adjusted according to the protection needs of different parts of the human body, so as to achieve differentiated and precise protection for key parts such as the chest cavity, abdominal cavity and limbs.

[0040] This invention improves the design of traditional single-structure explosion-proof materials and solves the technical problems of existing materials, such as heavy structure, poor impact resistance, low energy absorption efficiency, and poor durability. Attached Figure Description

[0041] Figure 1 This is a three-dimensional schematic diagram of the composite material of the present invention;

[0042] Figure 2 This is an exploded three-dimensional schematic diagram of the composite material of the present invention;

[0043] Figure 3 This is a top view schematic diagram of the biomimetic energy-absorbing crack-arresting layer in the material of this invention;

[0044] Figure 4 This is a three-dimensional schematic diagram of the high-toughness energy-absorbing layer functional monomer structure in the material of this invention;

[0045] Figure 5 This is a stress-strain result diagram of the composite material of the present invention under impact load;

[0046] Figure 6 This is a graph showing the comparison of the energy absorbed per unit volume of the composite material of this invention with other materials under multiple impact loads;

[0047] Figure 7 This is a graph showing the yield strength test results of the composite material of this invention under multiple impact loads;

[0048] Figure 8 This is a graph showing the test results of the dynamic elastic modulus of the composite material of this invention under multiple impact loads;

[0049] Figure reference numerals: 1. Lightweight explosion-proof composite material; 2-1. First high-strength impact-resistant surface layer; 2-2. Second high-strength impact-resistant surface layer; 3. Bionic crack-arresting energy-absorbing layer; 4. High-toughness energy-absorbing layer; 5. Hard impact-resistant material; 6. Soft energy-absorbing material; 7. Soft energy-absorbing material layer; 8. High-toughness energy-absorbing layer functional unit; 9. Cavity structure; 10. Metal spring support structure. Detailed Implementation

[0050] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0051] This embodiment provides a lightweight individual explosion-proof composite material that follows the design strategy of multi-structure configuration and multi-material synergistic effect. From the outside to the inside, a first high-strength impact-resistant surface layer 2-1, a biomimetic energy-absorbing crack-stopping layer 3, a high-toughness energy-absorbing layer 4, and a second high-strength impact-resistant surface layer 2-2 are arranged sequentially.

[0052] The aforementioned multi-structure configuration is reflected in the combination and superposition of multiple structures, including a composite material with sandwich structure characteristics, a biomimetic energy-absorbing and crack-arresting layer with alternating hard and soft materials, and a high-toughness energy-absorbing layer with cavity and metal support structure.

[0053] The sandwich structure of the composite material reduces structural weight while improving the material's bending stiffness, impact resistance, and energy absorption performance.

[0054] The alternating hard and soft material structure of the composite material reduces structural weight while significantly enhancing its energy absorption capacity, thereby achieving the mitigation and damage suppression of impact loads. Specifically, when the structure is subjected to impact and cracks are generated, the soft material can effectively prevent the further propagation of cracks, enhancing the structure's damage resistance.

[0055] The composite material contains several cavities in a high-toughness energy-absorbing layer and a metal support structure. The cavity structure reduces the overall structural weight while altering the propagation path of the impact stress wave and providing buffer space, thereby improving the material's impact resistance. The metal support structure enhances the overall toughness of the material, and its excellent damping characteristics help improve energy absorption capacity and facilitate the structure's deformation self-recovery under multiple impact loads.

[0056] The aforementioned multi-material synergy principle optimizes the selection of multiple material types based on the wave impedance matching principle, as follows:

[0057] When an external load is applied to a material, the impact propagates within the material as a stress wave. During propagation, as the stress wave travels from one medium to another, reflection and transmission occur at the material interface. The extent of these phenomena depends on the differences in the physical properties of the two media, i.e., the impedance matching relationship. When the stress wave is incident perpendicularly to the medium interface, the transmitted stress σ... T With incident stress σ I The following relationship must be satisfied:

[0058] σ T =Tσ I

[0059]

[0060] In the formula, T is the transmission coefficient of the shock wave, and ρ is the material density (g / cm³). 3 C represents wave speed, in m / s; ρ i C j Represents the wave impedance of the material, in N·s / m 3 .

[0061] When a stress wave propagates in n media, the transmission coefficient T n The following relationship must be satisfied:

[0062]

[0063] Obviously, The size of the transmitted wave directly affects its intensity, and different materials and their arrangement order will affect its size.

[0064] First, the composite material involved in this invention is considered as a whole, and the wave impedance is set as ρ. t C tThe wave impedance of the environmental medium (air or water environment) is set as ρ. e C e The ratio of the wave impedance of the environmental medium and the composite material is:

[0065]

[0066] When stress waves from environmental loads are transmitted through the material and then back into the load environment near the human body, the intensity of the transmitted wave is as follows:

[0067]

[0068] Preferably, the larger the value of 1+λ / λ, the smaller the intensity of the transmitted wave. That is, the greater the difference between the wave impedance of the composite material and the wave impedance of the environmental load, the greater the load attenuation.

[0069] Secondly, within the composite material, to minimize the amplitude of the shock wave transmission stress, the transmission coefficient T of the composite material with different material layers can be calculated. n To determine the internal arrangement order.

[0070] Preferably, composite materials composed of interlayer combinations with low transmission coefficients can effectively suppress the transmission of stress waves under impact loads and have good impact resistance.

[0071] The material selection under the multi-material synergy described in this invention is based on the principle of wave impedance mismatch, employing a "high impedance-low impedance-high impedance" design method. The outermost layer of the composite material is selected from materials with high impedance to reflect more shock waves; the middle layer is selected from materials with lower wave impedance to create impedance mismatch. Ultimately, the composite material as a whole exhibits excellent impact resistance.

[0072] The first high-strength impact-resistant surface layer 2-1 and the second high-strength impact-resistant surface layer 2-2 are made of epoxy resin carbon fiber cloth prepreg. High-strength, high-modulus carbon fiber laminate is selected as the surface layer of the composite material to reflect more shock waves. The thickness is 1-4mm, and it provides a surface layer with high hardness, high strength and high rigidity for the entire composite material, thereby improving the overall deformation resistance of the material.

[0073] The biomimetic energy-absorbing crack-arresting layer 3 is composed of a preferred carbon fiber laminate and a preferred wave impedance of 0.1–1.5 MPa·s / m and a density of 0.5–1 g / cm³. 3 It is made of alternating layers of closed-cell polyurethane foam material with a thickness of 1 to 4 mm, used to absorb impact energy and prevent the propagation of impact cracks.

[0074] The structure of the energy-absorbing crack-preventing layer 3 is as follows: the energy-absorbing crack-preventing layer is provided with several spaced soft energy-absorbing material layers 7, each of the soft energy-absorbing material layers 7 is divided into several spaced soft energy-absorbing material blocks 6, and the gaps between the soft energy-absorbing material blocks are filled with hard impact-resistant material 5.

[0075] The energy-absorbing crack-preventing layer structure is similar to a brick masonry structure.

[0076] The high-toughness energy-absorbing layer 4 has a preferred wave impedance of 0.1–1.5 MPa·s / m and a density of 0.5–1 g / cm³. 3 The material is composed of closed-cell polyurethane foam with a thickness of 8–15 mm. Several cylindrical cavities are formed within the material, with a cavity diameter to functional monomer length ratio of 1:4 to 3:4. Each cavity contains a metal spring support structure with a wire diameter of 0.3–0.7 mm and an inner diameter of 3–9 mm. This cavity structure reduces the overall mass of the composite material while altering the propagation path of shock waves, creating a compression buffer space. The metal support structure enhances the overall toughness of the foam material, improves its energy absorption capacity, and enables the composite material to self-recover under repeated impact loads.

[0077] The high-toughness energy-absorbing layer 4 is provided with several functional units 8, each of which includes a cylindrical cavity 9 and a metal spring support structure 10 inside the cavity.

[0078] The first high-strength impact-resistant surface layer, the biomimetic energy-absorbing crack-arresting layer, the high-toughness energy-absorbing layer, and the second high-strength impact-resistant surface layer are hot-pressed together at a temperature of 120-150℃ and a pressure of 1-2MPa to ensure a tight bond between the materials in each layer, resulting in a lightweight individual explosion-proof composite material.

[0079] The composite material is heat-sealed using epoxy resin at a temperature of 120–150°C and a pressure of 1–2 MPa, which effectively improves the material's adaptability and impact resistance in aquatic environments.

[0080] The lightweight explosion-proof composite material not only has strong resistance to out-of-plane impacts, but also possesses excellent energy absorption and buffering characteristics, enabling it to withstand significant impact forces and absorb impact energy. Its thinness and light weight make it highly suitable for meeting the performance requirements of impact protection materials and protective equipment for human bodies.

[0081] Example 1

[0082] This embodiment provides a lightweight explosion-proof composite material for individuals with a total thickness of 12mm.

[0083] From the outside in, there is a first high-strength impact-resistant surface layer with a thickness of 1 mm (density of 1.75 g / cm³). 3 (carbon fiber laminate);

[0084] A 1mm thick biomimetic energy-absorbing crack-arresting layer, hard (density 1.75g / cm³). 3 Carbon fiber laminate) and soft material (density 0.6 g / cm³) 3 The polyurethane foam has a width ratio of 1:1 and is laid in parallel and alternately.

[0085] Energy-absorbing crack-preventing layer structure: The energy-absorbing crack-preventing layer is provided with several spaced soft energy-absorbing material layers. Each soft energy-absorbing material layer is divided into several spaced soft energy-absorbing material blocks. The gaps between the soft energy-absorbing material blocks are filled with hard impact-resistant material.

[0086] 8mm thick high-toughness energy-absorbing layer (density 0.6g / cm³) 3 The polyurethane foam has an energy-absorbing layer with several functional units, each of which includes a cylindrical cavity and a metal spring support structure within the cavity; the ratio of the cavity diameter to the length of the functional unit is 5:12, and the metal spring has a density of 7.85 g / cm³. 3 The wire diameter and inner diameter of 65Mn are 0.5mm and 5mm respectively;

[0087] A second high-strength impact-resistant surface layer, 2mm thick (density 1.75g / cm³). 3 Carbon fiber laminate).

[0088] The materials of each layer are tightly bonded together by hot pressing to obtain a lightweight explosion-proof composite material, and then the edges are sealed.

[0089] The Hopkinson bar impact test (GB / T 34108-2017) was performed on the examples. Figure 5 The results shown are the test results when the impact load is 75MPa, 83MPa and 91MPa. During the impact, the composite material has good energy absorption capacity. At the same time, its strain hardening characteristics enable the material to maintain the continuity and integrity of the structure after undergoing large plastic deformation, thus effectively avoiding instantaneous failure under impact.

[0090] Hopkinson bar impact tests were conducted on the embodiments, and the energy absorbed per unit volume of the composite material was calculated based on the test data. The results were compared with conventional explosion-proof materials. The results show that the material of the present invention has a higher energy absorption capacity and can maintain good energy absorption stability under multiple impact conditions. The results are as follows: Figure 6 As shown.

[0091] Repeated Hopkinson bar impact tests were conducted on the embodiments. Under repeated impact loads of 75 MPa, 83 MPa, and 91 MPa, the lightweight composite material of the present invention exhibited stable strength and modulus, demonstrating excellent intrinsic toughness and effectively maintaining the integrity of its internal structure and mechanical properties. The test results are as follows: Figure 7 , Figure 8 .

Claims

1. An explosion-proof composite material, characterized in that, The composite material includes a first impact-resistant surface layer, a second impact-resistant surface layer, and an energy-absorbing layer disposed between the first and second impact-resistant surface layers, wherein an energy-absorbing crack-preventing layer is further disposed between the first impact-resistant surface layer and the energy-absorbing layer.

2. The explosion-proof composite material according to claim 1, characterized in that, The first and second impact-resistant surface layers are made by lay-up of carbon fiber prepreg. The energy-absorbing crack-arresting layer comprises a hard impact-resistant material and a soft energy-absorbing material; The energy-absorbing layer includes a foam material, wherein the foam material has a cylindrical cavity, and a metal spring support structure is provided inside the cavity.

3. The explosion-proof composite material according to claim 2, characterized in that, The soft energy-absorbing material and the foam material in the energy-absorbing layer both have a density of 0.2–1 g / cm³. 3 The closed-cell foam structure.

4. The explosion-proof composite material according to claim 2, characterized in that, In the energy-absorbing and crack-resistant layer, the rigid impact-resistant material includes carbon fiber laminate; the soft energy-absorbing material includes polyurethane foam. The foam material in the energy-absorbing layer includes polyurethane foam.

5. The explosion-proof composite material according to claim 2, characterized in that, The hard impact-resistant material and the soft energy-absorbing material in the energy-absorbing and crack-preventing layer are laid in parallel and alternately; wherein the width ratio of the hard impact-resistant material and the soft energy-absorbing material is 1:1 to 1:

5.

6. The explosion-proof composite material according to claim 1, characterized in that, The energy-absorbing layer is provided with several functional units, each of which includes a cylindrical cavity and a metal spring support structure inside the cavity; wherein the ratio of the cavity diameter to the length of the functional unit is 1:4 to 3:4, the wire diameter of the metal spring support structure is 0.3 to 0.7 mm, and the inner diameter is 3 to 9 mm.

7. The explosion-proof composite material according to claim 1, characterized in that, The composite material has a thickness of 10–25 mm; the first impact-resistant surface layer has a thickness of 1–4 mm; the energy-absorbing and crack-inhibiting layer has a thickness of 1–4 mm; the energy-absorbing layer has a thickness of 8–15 mm; and the second impact-resistant surface layer has a thickness of 1–4 mm.

8. A method for preparing an explosion-proof composite material, comprising: (1) Preparation of the first and second impact-resistant surface layers: Epoxy resin carbon fiber cloth prepreg is laid according to the set layup method, and the whole is cured and molded into carbon fiber laminate to obtain the first and second impact-resistant surface layers. (2) Hard impact-resistant materials and soft energy-absorbing materials are spliced ​​together and integrally formed by hot pressing process to obtain an energy-absorbing crack-preventing layer. (3) The closed-cell foam material is opened according to the predetermined structural parameters to form several cylindrical cavity structures. Then, the metal spring support structure is filled into each cylindrical cavity of the closed-cell foam material to obtain an energy-absorbing layer. (4) The first impact-resistant surface layer, the energy-absorbing crack-stopping layer, the energy-absorbing layer and the second impact-resistant surface layer are stacked sequentially from the outside to the inside, and the materials of each layer are tightly bonded to obtain the explosion-proof composite material.

9. The preparation method according to claim 8, characterized in that, In step (1), the layup method is to lay up the epoxy resin carbon fiber cloth prepreg according to the [0,90] layup method; the overall curing and molding method is vacuum hot pressing molding. In step (2), the hard impact-resistant material and soft energy-absorbing material used for splicing and combining are prepared as follows: a three-dimensional model of the energy-absorbing and crack-preventing layer structure is established using three-dimensional modeling software according to the predetermined structural parameters. The hard material and soft material parts in the established three-dimensional model are saved as model files respectively. The model files of the hard material and soft material are imported into an automated engraving machine, and the hard material and soft material of the predetermined thickness are cut to obtain the desired results. In step (2), an adhesive is used in the hot pressing process for integral molding, wherein the adhesive is epoxy resin. The methods for tightly bonding the various layers of material in step (4) include hot pressing or vacuum forming; In step (4), epoxy resin adhesive and hot pressing process are used to seal the edges of the explosion-proof composite material.

10. The application of the explosion-proof composite material according to any one of claims 1-7 as a protective material in land and underwater explosion environments.

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