Lightweight hybrid fiber bulletproof plugboard and preparation method

Abstract

The application provides a lightweight hybrid fiber bulletproof plugboard and a preparation method, and belongs to the field of high-performance protective composite materials. The lightweight hybrid fiber bulletproof plugboard is composed of a shear protection layer, a reinforcing layer, a deformation protection layer and a high polymer energy absorption layer which are stacked in sequence. The material of the shear protection layer is ultra-high molecular weight polyethylene fiber, the material of the reinforcing layer is one of aramid fiber, carbon fiber or glass fiber, the material of the deformation protection layer is ultra-high molecular weight polyethylene fiber, and the material of the high polymer energy absorption layer is one of polyurethane foam, ethylene-vinyl acetate foam, polypropylene foam, polyethylene foam or polyvinyl chloride foam. The lightweight hybrid fiber bulletproof plugboard solves the problem of large deformation and poor protection performance of the ultra-high molecular weight polyethylene fiber bulletproof plugboard with low surface density and small thickness after being shot by a bullet with large kinetic energy, and has the advantages of lightweight, high protection and small deformation.

Description

Technical Field

[0001] This invention relates to the technical field of high-performance protective composite materials, specifically to a lightweight hybrid fiber bulletproof insert and its preparation method. Background Technology

[0002] Ultra-high molecular weight polyethylene fiber has been widely used in bulletproof vests, helmets, and protective gear due to its superior physical and chemical properties and excellent impact resistance. However, its non-polar characteristics make it easy for the fibers to slip severely after being hit by a bullet, resulting in a large amount of back deformation. In this case, although the bullet does not cause direct penetration damage to the wearer, the excessive back deformation can still cause blunt force injury to the wearer.

[0003] As the requirements for lightweight bulletproof plates gradually increase, especially when facing threats from high-energy bullets such as the M80, lightweight and thin ultra-high molecular weight polyethylene fiber bulletproof plates generally have the disadvantages of large deformation on the back after being hit by a bullet and poor protective effect. Therefore, it is necessary to optimize these defects.

[0004] Patent CN202410827236.6 discloses a lightweight, highly flame-retardant, high-speed fragmentation-resistant composite layer and its preparation method. It involves weaving aramid fibers and ultra-high molecular weight polyethylene fibers together, then layering basalt fiber plain weave fabric on the surface. This primarily enhances fragmentation resistance and penetration resistance, but its molding process is complex and requires sophisticated production equipment. Patent CN202410885404.7 discloses a lightweight, ballistic-resistant, and explosion-proof composite armor for helicopters and its preparation method. It involves weaving carbon fiber and aramid fibers together, but its structure contains ceramics, resulting in a heavy product that is unsuitable for human protection. Patent CN119550703 discloses a novel hybrid fiber composite material and its preparation method, made from carbon fiber, aramid fiber, and ultra-high molecular weight polyethylene fiber. However, its fiber fabric requires plasma treatment, making the process complex and costly. This patent also focuses on protecting against low-kinetic-energy spheres, making protection less challenging. Patent CN119594800A discloses a composite bulletproof insert and its preparation method, which is prepared by combining modified carbon fiber, alumina particles, and hybrid fibers. The preparation process is relatively complicated, and the resulting insert has a high areal density and is heavy. Patent CN119063578A discloses a method for preparing a fiber-hybrid composite bulletproof helmet and the helmet itself. This method requires precise fiber fabric laying angles and is complex to prepare. However, this patent addresses a lower level of bullet threat and design difficulty compared to the present patent. Patent CN203203470U discloses a multi-layered ultra-high molecular weight polyethylene fiber bulletproof plate, but it is made by repeatedly stacking and combining multiple pre-pressed ultra-high molecular weight polyethylene fiber bulletproof plates, resulting in numerous production steps and a relatively complicated preparation process.

[0005] The lightweight hybrid fiber bulletproof insert of this invention adopts a unique structural design (a shear protection layer, a reinforcement layer, a deformation protection layer, and a polymer energy-absorbing layer stacked sequentially) and a high-efficiency, low-cost production method. It solves the problem of large back deformation and poor protective performance of low-area-density, thin-thickness ultra-high molecular weight polyethylene fiber bulletproof inserts after being hit by high-energy bullets. It has the advantages of being lightweight, highly protective, and having small deformation, and has a good application prospect in the personal protective equipment industry. Summary of the Invention

[0006] In view of this, one of the objectives of this invention is to propose a lightweight hybrid fiber bulletproof insert that combines lightweight and high strength with good protective performance, in order to solve the problem of large deformation and poor protective performance of low areal density and thin ultra-high molecular weight polyethylene fiber bulletproof inserts after being hit by high kinetic energy bullets. It has broad application prospects and market value in the fields of bulletproof and fragmentation protection.

[0007] The second objective of this invention is to provide a method for preparing a lightweight hybrid fiber bulletproof insert.

[0008] The third objective of this invention is to provide a specific application of a lightweight hybrid fiber bulletproof insert.

[0009] Based on the above objective, the present invention provides a lightweight hybrid fiber bulletproof insert, which includes a shear protection layer, a reinforcement layer, a deformation protection layer, and a polymer energy-absorbing layer stacked sequentially.

[0010] Furthermore, the shear protection layer is made of ultra-high molecular weight polyethylene fiber with a surface density of 8-9.5 kg / m³. 2 The areal density of single-layer ultra-high molecular weight polyethylene fiber is 50-140 g / m³. 2 The fiber strength is 38-42 cN / dtex.

[0011] Furthermore, the reinforcing layer is made of one of aramid fiber, carbon fiber, or glass fiber, and the surface density of the reinforcing layer is 1-2 kg / m³. 2 The areal density of the single-layer reinforcing fiber is 150-300 g / m². 2 The fiber arrangement of the reinforcing layer is [0° / 90° / 0° / 90°] or [0° / 45° / 90° / 0° / 45° / 90°].

[0012] Furthermore, the deformation protection layer is made of ultra-high molecular weight polyethylene fiber with a surface density of 3.5-5 kg / m³. 2 The areal density of single-layer ultra-high molecular weight polyethylene fiber is 50-140 g / m³. 2 The fiber strength is 38-42 cN / dtex.

[0013] Furthermore, the polymer energy-absorbing layer is made of one of the following materials: polyurethane foam, ethylene-vinyl acetate foam, polypropylene foam, polyethylene foam, or polyvinyl chloride foam, with a thickness of 6-10 mm and a density of 100-200 g / m³. 3 Its Shore hardness is 60-70 HA.

[0014] Furthermore, the shear protection layer, the reinforcement layer, and the deformation protection layer are connected by a single-layer adhesive film.

[0015] Furthermore, the adhesive film is one of epoxy adhesive, polyurethane adhesive, polyacrylic adhesive, or silicone adhesive. The surface density of a single-layer adhesive film is 100-150 g / m³. 2 .

[0016] Furthermore, the deformation protection layer and the polymer energy-absorbing layer are connected by an adhesive.

[0017] Furthermore, the adhesive is one of epoxy adhesive, polyurethane adhesive, polyacrylic adhesive or silicone adhesive.

[0018] Based on the above-mentioned objective two, the present invention also provides a method for preparing a lightweight hybrid fiber bulletproof insert, the specific preparation steps of which are as follows:

[0019] S1: Cut the shear protection layer, reinforcement layer, deformation protection layer, polymer energy-absorbing layer, and adhesive film according to the preset cutting size, and dry them for later use;

[0020] S2: Lay out the layers in the following order: shear protection layer, adhesive film, reinforcing layer, adhesive film, deformation protection layer;

[0021] S3: The raw materials of the hybrid layup in step S2 are used to prepare lightweight hybrid fiber bulletproof insert semi-finished products by gradient hot pressing molding process.

[0022] S4: Cut the lightweight hybrid fiber bulletproof insert pressed semi-finished product from step S3 into lightweight hybrid fiber bulletproof insert cut semi-finished product.

[0023] S5: Coat one side of the polymer energy-absorbing layer material with adhesive and connect it to the deformation protection layer of the lightweight hybrid fiber bulletproof insert semi-finished product cut in step S4.

[0024] Furthermore, in step S3, the gradient hot pressing molding process conditions are as follows: the first heating and pressurization conditions are: hot pressing temperature 90-100℃, pressure 5MPa, and holding temperature and pressure for 40min to promote the initial wetting between the shear protection layer, reinforcement layer, deformation protection layer and adhesive film layer; the second heating and pressurization conditions are: hot pressing temperature 100-105℃, pressure 10MPa, and holding temperature and pressure for 30min to further promote the wetting and bonding between the shear protection layer, reinforcement layer, deformation protection layer and adhesive film layer; the third holding and pressurization conditions are: hot pressing temperature 100-105℃, pressure 20-25MPa, and holding temperature and pressure for 30min; the fourth heating and pressurization conditions are: hot pressing temperature 110-120℃, pressure 25MPa, and holding temperature and pressure for 1h to completely melt the adhesive film and wet each layer of fiber fabric; heating is stopped, circulating cooling water is introduced to maintain pressure for 1h, and pressure is released to obtain a lightweight hybrid fiber bulletproof insert pressed semi-finished product.

[0025] Furthermore, in step S4, laser cutting or mechanical cutting processes are used for cutting.

[0026] Furthermore, in step S5, the amount of adhesive applied is controlled at 100-400 g / m². 2 .

[0027] Based on the aforementioned objective three, the present invention also provides a specific application of a lightweight hybrid fiber bulletproof insert with an areal density of 14.6 kg / m³. 2 The lightweight hybrid fiber bulletproof insert with a thickness of 21.5mm can effectively protect against six rounds of M80 bullets (7.62×51mm NATO FMJ) with a bullet impact indentation value of no more than 44mm, meeting the Level III protection requirements in the NIJ Standards 0101.06 standard, and has a good application prospect in the field of personal protective equipment.

[0028] Compared with the prior art, the implementation of the present invention has at least the following advantages:

[0029] 1. The lightweight hybrid fiber bulletproof insert of the present invention comprises a shear protection layer, a reinforcement layer, a deformation protection layer, and a polymer energy-absorbing layer stacked sequentially. The shear protection layer is made of ultra-high molecular weight polyethylene fiber, which mainly consumes load energy through shear energy absorption; the reinforcement layer is made of aramid fiber, carbon fiber, or glass fiber material, which reduces the transmission of impact load to the body surface through the stretching effect of the fibers, reduces the deformation of the back deformation protection layer, and improves the protective performance; the deformation protection layer is made of ultra-high molecular weight polyethylene fiber, which improves energy absorption and protective performance through deformation; the polymer energy-absorbing layer is a high-density polymer foam material, which absorbs the remaining impact energy through the deformation of the foam structure, reducing the deformation of the back of the insert.

[0030] 2. The lightweight hybrid fiber bulletproof insert described in this invention patent is lighter and thinner than other protective structures with the same level of bulletproof protection, while ensuring effective protection. Furthermore, the manufacturing method is simple, stable, reliable, and suitable for mass production. This invention patent achieves a designed areal density of 14.6 kg / m³. 2 A test sample with a thickness of 21.5mm and a lateral dimension of 250mm×300mm can withstand a six-round burst of M80 bullets (7.62×51mm NATO FMJ) with a bullet impact point indentation value not exceeding 44mm.

[0031] 3. The lightweight hybrid fiber bulletproof insert described in this invention has a small range of thicknesses for each structural layer, and its structure is precise. It is not obtained by simply increasing or decreasing the thickness. Other structures with the same or similar areal density are difficult to achieve effective protection. Moreover, it has obvious advantages in weight and economy. Under the same bulletproof material or cost standard, existing bulletproof inserts are difficult to reach the level described in this invention.

[0032] 4. By setting the material, surface density, and location of the reinforcing layer, this invention patent can effectively reduce the back bulge of the bulletproof insert after impact, reduce the impact of the projectile on the human body, and at the same time effectively improve the bulletproof insert's resistance to multiple projectiles and improve the bulletproof insert's protective performance. Attached Figure Description

[0033] Figure 1 This is a three-dimensional view of the disassembled structure of the lightweight hybrid fiber bulletproof insert of the present invention.

[0034] Among them, (1) is a shear protection layer, (2) is a reinforcement layer, (3) is a deformation protection layer, and (4) is a polymer energy absorption layer. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, 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.

[0036] Example 1

[0037] The lightweight hybrid fiber bulletproof insert described in this embodiment consists of a shear protection layer, a reinforcement layer, a deformation protection layer, and a polymer energy-absorbing layer.

[0038] The shear protection layer is made of ultra-high molecular weight polyethylene fiber with a surface density of 8.2 kg / m³. 2 The areal density of single-layer ultra-high molecular weight polyethylene fiber is 70 g / m³. 2The fiber strength is 39 cN / dtex.

[0039] The reinforcing layer is made of aramid fiber with an areal density of 1 kg / m³. 2 The areal density of single-layer aramid fiber is 250 g / m³. 2 The fiber arrangement of the reinforcing layer is [0° / 90° / 0° / 90°].

[0040] The deformation protection layer is made of ultra-high molecular weight polyethylene fiber with a surface density of 4.1 kg / m³. 2 The areal density of single-layer ultra-high molecular weight polyethylene fiber is 70 g / m³. 2 The fiber strength is 39 cN / dtex.

[0041] The polymer energy-absorbing layer is made of polypropylene foam, with a thickness of 8mm and a density of 130g / m³. 3 Its Shore hardness is 63HA.

[0042] The shear protection layer, the reinforcement layer, and the deformation protection layer are connected by a single-layer epoxy film with a surface density of 120 g / m². 2 .

[0043] The deformation protection layer and the polymer energy-absorbing layer are connected by epoxy adhesive, with the coating amount controlled at 150g / m². 2 .

[0044] The sample was prepared according to the preparation method described in this patent. It was then cut into test samples with a transverse dimension of 250mm × 300mm using a laser cutting process.

[0045] With the above structural configurations, the areal density of the bulletproof insert 1 provided in this application is 14.6 kg / m³. 2 With a thickness of 21.5mm, it can effectively withstand a six-round burst of M80 bullets (7.62×51mm NATO FMJ), and the impact point indentation value does not exceed 44mm.

[0046] Example 2

[0047] The lightweight hybrid fiber bulletproof insert described in this embodiment consists of a shear protection layer, a reinforcement layer, a deformation protection layer, and a polymer energy-absorbing layer.

[0048] The shear protection layer is made of ultra-high molecular weight polyethylene fiber with a surface density of 8.5 kg / m³. 2 The areal density of single-layer ultra-high molecular weight polyethylene fiber is 70 g / m³. 2 The fiber strength is 39 cN / dtex.

[0049] The reinforcing layer is made of aramid fiber with an areal density of 1 kg / m³. 2 The areal density of single-layer aramid fiber is 250 g / m³.2 The fiber arrangement of the reinforcing layer is [0° / 90° / 0° / 90°].

[0050] The deformation protection layer is made of ultra-high molecular weight polyethylene fiber with a surface density of 3.8 kg / m³. 2 The areal density of single-layer ultra-high molecular weight polyethylene fiber is 70 g / m³. 2 The fiber strength is 39 cN / dtex.

[0051] The polymer energy-absorbing layer is made of polypropylene foam, with a thickness of 8mm and a density of 130g / m³. 3 Its Shore hardness is 63HA.

[0052] The shear protection layer, the reinforcement layer, and the deformation protection layer are connected by a single-layer epoxy film with a surface density of 120 g / m². 2 .

[0053] The deformation protection layer and the polymer energy-absorbing layer are connected by epoxy adhesive, with the coating amount controlled at 150g / m². 2 .

[0054] The sample was prepared according to the preparation method described in this patent. It was then cut into test samples with a transverse dimension of 250mm × 300mm using a laser cutting process.

[0055] With the above structural configurations, the areal density of the bulletproof insert 2 provided in this application is 14.6 kg / m³. 2 With a thickness of 21.5mm, it can effectively withstand a six-round burst of M80 bullets (7.62×51mm NATO FMJ), and the impact point indentation value does not exceed 44mm.

[0056] Example 3

[0057] The lightweight hybrid fiber bulletproof insert described in this embodiment consists of a shear protection layer, a reinforcement layer, a deformation protection layer, and a polymer energy-absorbing layer.

[0058] The shear protection layer is made of ultra-high molecular weight polyethylene fiber with a surface density of 8.2 kg / m³. 2 The areal density of single-layer ultra-high molecular weight polyethylene fiber is 70 g / m³. 2 The fiber strength is 39 cN / dtex.

[0059] The reinforcing layer is made of aramid fiber with an areal density of 1.25 kg / m³. 2 The areal density of single-layer aramid fiber is 250 g / m³. 2 The fiber arrangement of the reinforcing layer is [0° / 90° / 0° / 90°].

[0060] The deformation protection layer is made of ultra-high molecular weight polyethylene fiber with a surface density of 4.1 kg / m³. 2 The areal density of single-layer ultra-high molecular weight polyethylene fiber is 70 g / m³. 2 The fiber strength is 39 cN / dtex.

[0061] The polymer energy-absorbing layer is made of polypropylene foam, with a thickness of 8mm and a density of 130g / m³. 3 Its Shore hardness is 63HA.

[0062] The shear protection layer, the reinforcement layer, and the deformation protection layer are connected by a single-layer epoxy film with a surface density of 120 g / m². 2 .

[0063] The deformation protection layer and the polymer energy-absorbing layer are connected by epoxy adhesive, with the coating amount controlled at 150g / m². 2 .

[0064] The sample was prepared according to the preparation method described in this patent. It was then cut into test samples with a transverse dimension of 250mm × 300mm using a laser cutting process.

[0065] With the above structural configurations, the areal density of the bulletproof insert 3 provided in this application is 14.9 kg / m³. 2 With a thickness of 21.7mm, it can effectively withstand a six-round burst of M80 bullets (7.62×51mm NATO FMJ), and the impact point indentation value does not exceed 44mm.

[0066] Comparative Example 1

[0067] The bulletproof insert described in this comparative example is a non-lightweight hybrid fiber bulletproof insert, which is composed of ultra-high molecular weight polyethylene fiber and a polymer energy-absorbing layer.

[0068] Ultra-high molecular weight polyethylene fiber with an areal density of 13.4 kg / m³ 2 The areal density of single-layer ultra-high molecular weight polyethylene fiber is 70 g / m³. 2 The fiber strength is 39 cN / dtex.

[0069] The polymer energy-absorbing layer is made of polypropylene foam, with a thickness of 8mm and a density of 130g / m³. 3 Its Shore hardness is 63HA.

[0070] The ultra-high molecular weight polyethylene fiber and the polymer energy-absorbing layer are connected by epoxy adhesive, with the coating amount controlled at 150g / m². 2 .

[0071] The sample was prepared according to the preparation method described in this patent. It was then cut into test samples with a transverse dimension of 250mm × 300mm using a laser cutting process.

[0072] With the above structural configurations, the areal density of the bulletproof insert 4 provided in this application is 14.5 kg / m³. 2 The material is 22mm thick. After six shots from an M80 bullet (7.62×51mm NATO FMJ), the test results showed that two bullets had impact points with indentations of 47mm and 50mm respectively, which exceeded 44mm, and therefore failed to provide effective protection.

[0073] Comparative Example 2

[0074] The bulletproof insert described in this comparative example is a non-lightweight hybrid fiber bulletproof insert, which is composed of ultra-high molecular weight polyethylene fiber and a polymer energy-absorbing layer.

[0075] Ultra-high molecular weight polyethylene fiber with an areal density of 13.4 kg / m³ 2 The areal density of single-layer ultra-high molecular weight polyethylene fiber is 130 g / m³. 2 The fiber strength is 39 cN / dtex.

[0076] The polymer energy-absorbing layer is made of polypropylene foam, with a thickness of 8mm and a density of 130g / m³. 3 Its Shore hardness is 63HA.

[0077] The ultra-high molecular weight polyethylene fiber and the polymer energy-absorbing layer are connected by epoxy adhesive, with the coating amount controlled at 150g / m². 2 .

[0078] The sample was prepared according to the preparation method described in this patent. It was then cut into test samples with a transverse dimension of 250mm × 300mm using a laser cutting process.

[0079] With the above structural configurations, the areal density of the bulletproof insert 5 provided in this application is 14.5 kg / m³. 2 The material is 22mm thick. After six shots from an M80 bullet (7.62×51mm NATO FMJ), the test results showed that two bullets had impact points with indentations of 45mm and 53mm respectively, which exceeded 44mm, and therefore failed to provide effective protection.

[0080] Comparative Example 3

[0081] The lightweight hybrid fiber bulletproof insert described in this comparative example consists of a shear protection layer, a reinforcement layer, a deformation protection layer, and a polymer energy-absorbing layer.

[0082] The shear protection layer is made of ultra-high molecular weight polyethylene fiber with a surface density of 6.2 kg / m³.2 The areal density of single-layer ultra-high molecular weight polyethylene fiber is 70 g / m³. 2 The fiber strength is 39 cN / dtex.

[0083] The reinforcing layer is made of aramid fiber with an areal density of 1.25 kg / m³. 2 The areal density of single-layer aramid fiber is 250 g / m³. 2 The fiber arrangement of the reinforcing layer is [0° / 90° / 0° / 90°].

[0084] The deformation protection layer is made of ultra-high molecular weight polyethylene fiber with a surface density of 6.1 kg / m³. 2 The areal density of single-layer ultra-high molecular weight polyethylene fiber is 70 g / m³. 2 The fiber strength is 39 cN / dtex.

[0085] The polymer energy-absorbing layer is made of polypropylene foam, with a thickness of 8mm and a density of 130g / m³. 3 Its Shore hardness is 63HA.

[0086] The shear protection layer, the reinforcement layer, and the deformation protection layer are connected by a single-layer epoxy film with a surface density of 120 g / m². 2 .

[0087] The deformation protection layer and the polymer energy-absorbing layer are connected by epoxy adhesive, with the coating amount controlled at 150g / m². 2 .

[0088] The sample was prepared according to the preparation method described in this patent. It was then cut into test samples with a transverse dimension of 250mm × 300mm using a laser cutting process.

[0089] With the above structural configurations, the areal density of the bulletproof insert 6 provided in this application is 14.9 kg / m³. 2 With a thickness of 21.7mm, it was penetrated by one shot after a six-round burst of M80 bullets (7.62×51mm NATO FMJ), failing to provide effective protection.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; 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 or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A lightweight hybrid fiber ballistic panel, characterized by: The light-weight hybrid fiber bulletproof insert plate comprises a shear protection layer, a reinforcing layer, a deformation protection layer and a polymer energy absorption layer which are stacked in sequence, the shear protection layer is made of ultra-high molecular weight polyethylene fiber, the areal density is 8-9.5 kg / m 2 , the areal density of single-layer ultra-high molecular weight polyethylene fiber is 50-140 g / m 2 , the fiber strength is 38-42 cN / dtex, the reinforcing layer is made of one of aramid fiber, carbon fiber or glass fiber, the areal density of the reinforcing layer is 1-2 kg / m 2 , the areal density of single-layer reinforcing layer fiber is 150-300 g / m 2 , the reinforcing layer fiber arrangement mode is [0° / 90° / 0° / 90°] or [0° / 45° / 90° / 0° / 45° / 90°], the deformation protection layer is made of ultra-high molecular weight polyethylene fiber, the areal density is 3.5-5 kg / m 2 , the areal density of single-layer ultra-high molecular weight polyethylene fiber is 50-140 g / m 2 , the fiber strength is 38-42 cN / dtex, the polymer energy absorption layer is made of one of polyurethane foam, ethylene-vinyl acetate foam, polypropylene foam, polyethylene foam or polyvinyl chloride foam, the thickness is 6-10 mm, the density is 100-200 g / m 3 , and the Shore hardness is 60-70 HA. The light-weight hybrid fiber bulletproof insert plate is prepared based on the following manner: S1: cutting the shear protection layer, the reinforcing layer, the deformation protection layer, the polymer energy absorption layer and the adhesive film according to preset cutting sizes, and drying for standby; S2: layering in the order of the shear protection layer, the adhesive film, the reinforcing layer, the adhesive film and the deformation protection layer; S3: preparing a light-weight hybrid fiber bulletproof insert plate pressing semi-finished product by using a gradient hot pressing forming process on the hybrid layered raw materials in step S2; S4: cutting the light-weight hybrid fiber bulletproof insert plate pressing semi-finished product in step S3 into a light-weight hybrid fiber bulletproof insert plate cutting semi-finished product; S5: coating an adhesive on one side of the polymer energy absorption layer material, and connecting the deformation protection layer of the light-weight hybrid fiber bulletproof insert plate cutting semi-finished product in step S4.

2. A lightweight hybrid fiber ballistic panel according to claim 1, wherein: The shear protection layer, the reinforcing layer and the deformation protection layer are connected by a single layer of adhesive film, the adhesive film is one of epoxy adhesive, polyurethane adhesive, polyacrylic adhesive or silicone adhesive, and the single layer of adhesive film has a surface density of 100-150 g / m 2 .

3. The lightweight hybrid fiber ballistic panel of claim 1, wherein: The deformation protection layer and the polymer energy absorption layer are connected through the adhesive, and the adhesive is one of an epoxy adhesive, a polyurethane adhesive, a polyacrylic acid adhesive or a silicone adhesive.

4. The lightweight hybrid fiber ballistic panel of claim 1, wherein, The gradient hot pressing forming process conditions in step S3 are as follows: the first temperature and pressure increasing conditions are that the hot pressing temperature is 90-100 DEG C, the pressure is 5 MPa, the temperature and pressure are maintained for 40 min, and the preliminary infiltration between the shear protection layer, the reinforcing layer, the deformation protection layer and the adhesive film layer is promoted; the second temperature and pressure increasing conditions are that the hot pressing temperature is 100-105 DEG C, the pressure is 10 MPa, the temperature and pressure are maintained for 30 min, and the infiltration and bonding between the shear protection layer, the reinforcing layer, the deformation protection layer and the adhesive film layer are further promoted; the third temperature and pressure maintaining conditions are that the hot pressing temperature is 100-105 DEG C, the pressure is 20-25 MPa, and the temperature and pressure are maintained for 30 min; the fourth temperature and pressure increasing conditions are that the hot pressing temperature is 110-120 DEG C, the pressure is 25 MPa, and the temperature and pressure are maintained for 1 h, so that the adhesive film is completely melted and infiltrates the fiber fabrics of each layer; the heating is stopped, circulating cooling water is introduced for pressure maintaining for 1 h, and the pressure is released to obtain the light-weight hybrid fiber bulletproof insert plate pressing semi-finished product.

5. The lightweight hybrid fiber ballistic panel of claim 1, wherein: The adhesive coating amount in the step S5 is controlled to 100-400 g / m 2 .

6. The lightweight hybrid fiber ballistic panel of claim 1, wherein: A kind of lightweight hybrid fiber bulletproof insert board protection structure, meet the bulletproof insert board of III level protection requirement in the standard of “NIJ Standards 0101.06”, the area density is 14.6kg / m 2 , the thickness is 21.5mm, the structure is 8.2kg / m 2 Ultra-high molecular weight polyethylene fiber+1kg / m 2 Aramid fiber+4.1kg / m 2 Ultra-high molecular weight polyethylene fiber+8mm polypropylene foam.

7. The lightweight hybrid fiber ballistic panel of claim 1, wherein: A kind of lightweight hybrid fiber bulletproof insert board protection structure, meet the bulletproof insert board of III level protection requirement in the standard of “NIJ Standards 0101.06”, the area density is 14.6kg / m 2 , the thickness is 21.5mm, the structure is 8.5kg / m 2 Ultra-high molecular weight polyethylene fiber+1kg / m 2 Aramid fiber+3.8kg / m 2 Ultra-high molecular weight polyethylene fiber+8mm polypropylene foam.

8. The lightweight hybrid fiber ballistic panel of claim 1, wherein: A kind of lightweight hybrid fiber bulletproof insert board protection structure, meet the bulletproof insert board of III level protection requirement in the standard of “NIJ Standards 0101.06”, the area density is 14.9kg / m 2 , the thickness is 21.7mm, the structure is 8.2kg / m 2 Ultra-high molecular weight polyethylene fiber+1.25kg / m 2 Aramid fiber+4.1kg / m 2 Ultra-high molecular weight polyethylene fiber+8mm polypropylene foam.

9. A method for preparing a lightweight hybrid fiber ballistic panel according to claim 1, wherein, Comprise: S1: cutting the shear protection layer, the reinforcing layer, the deformation protection layer, the polymer energy absorption layer and the adhesive film according to preset cutting sizes, and drying for standby; S2: layering in the order of the shear protection layer, the adhesive film, the reinforcing layer, the adhesive film and the deformation protection layer; S3: preparing a light-weight hybrid fiber bulletproof insert plate pressing semi-finished product by using a gradient hot pressing forming process on the hybrid layered raw materials in step S2; S4: cutting the light-weight hybrid fiber bulletproof insert plate pressing semi-finished product in step S3 into a light-weight hybrid fiber bulletproof insert plate cutting semi-finished product; S5: coating an adhesive on one side of the polymer energy absorption layer material, and connecting the deformation protection layer of the light-weight hybrid fiber bulletproof insert plate cutting semi-finished product in step S4.

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