A ballistic curved panel satisfying the NIJ0101.06 level III standard and a preparation method thereof

Abstract

The present application relates to a kind of bulletproof curved panel satisfying NIJ0101.06 three level standard and its preparation method, by selecting suitable concave material, hot melt adhesive film and ultra-high molecular weight polyethylene material and curing layer material, and suitable and simple preparation method, the face density of the bulletproof curved panel obtained is not more than 15kg / m 2 , can resist 6 M80 gun bullet concave not more than 40mm, satisfy the three level standard requirements of American standard NIJ0101.06.

Description

Technical Field

[0001] This invention belongs to the field of bulletproof curved panel technology, specifically relating to a bulletproof curved panel that meets the NIJ0101.06 Level 3 standard and its preparation method. Background Technology

[0002] Polyethylene (PE) inserts typically weigh between 1 and 1.5 kg, significantly lighter than steel and ceramic inserts. However, due to current limitations in material processing, the highest protection level achievable with pure PE inserts is NIJ Level III, insufficient to protect against armor-piercing rifle rounds and bullets with greater power. Composite PE ballistic plates offer improved performance, but the areal density of plates manufactured using current technology is around 17 kg / m³. 2 The above; Patent CN202022496929.1 discloses a bulletproof structure, including: a bulletproof layer, the bulletproof layer comprising a multi-layer ultra-high molecular weight polyethylene fiber woven structure, the weaving direction of adjacent two layers of the ultra-high molecular weight polyethylene fiber woven structure being arranged at 90°, and the areal density of the bulletproof layer being 50 g / m³. 2 -60g / m 2 The ballistic protection layer includes an anti-dent layer disposed on the back surface of the ballistic protection layer, comprising a multi-layered microfiber three-dimensional woven structure; the final dent result of the second ballistic protection structure is 26.0 mm, with a theoretical areal density of 19.26 kg / m³. 2 Patent CN202011325268.4 describes a composite bulletproof insert comprising a PE laminate, an aramid fabric transition layer, bulletproof ceramic, and an aramid fabric crack-resistant layer, arranged sequentially from the back plate to the front plate. The composite bulletproof insert weighs no more than 2.8 kg and has a surface density of no more than 35 kg / m³. 2 The thickness does not exceed 22mm. There is no existing technology that meets the NIJ0101.06 Level 3 standard and has a surface density of less than 17kg / m³. 2 Bulletproof curved panels. Summary of the Invention

[0003] The purpose of this invention is to provide a bulletproof curved panel that meets the NIJ0101.06 Level 3 standard and its preparation method, so as to solve the problems of high surface density and deep indentation of current bulletproof curved panels.

[0004] The content of this invention includes:

[0005] A bulletproof curved panel meeting NIJ0101.06 Level 3 standard comprises, from the outside to the inside, a curing layer, an ultra-high molecular weight polyethylene bulletproof curved panel, a hot melt adhesive film layer, and a dent-reducing material layer; the dent-reducing material layer is composed of one of the following: carbon fiber woven fabric, aramid woven fabric, carbon fiber nonwoven fabric, aramid nonwoven fabric, carbon fiber-aramid blended woven fabric, or carbon fiber-aramid blended nonwoven fabric; the areal density of the dent-reducing material is 150-450 g / m³. 2 The thickness is 0.2-0.5mm.

[0006] Furthermore, the ultra-high molecular weight polyethylene bulletproof curved panel has an areal density of 105-125 g / m³. 2 It is made of ultra-high molecular weight polyethylene nonwoven fabric.

[0007] Furthermore, the ultra-high molecular weight polyethylene nonwoven fabric, after layout, cutting, weighting, and pressing, achieves an areal density of 12.4-12.5 kg / m². 2 Ultra-high molecular weight polyethylene bulletproof curved panel.

[0008] Furthermore, the counterweight is achieved by selecting each piece of cut non-woven fabric, removing fabric samples with insects, impurities, defects, etc., and then stacking and piling the fabric samples according to the specified surface density.

[0009] Furthermore, the cured layer is made of one of aramid, glass fiber, or ultra-high molecular weight polyethylene fiber.

[0010] Furthermore, the hot melt adhesive film layer is one of PO, TPU or EVA.

[0011] Furthermore, the main component of the PO hot melt adhesive film is polyolefin; the TPU hot melt adhesive, also known as TPU hot melt double-sided adhesive, is mainly composed of polyurethane; and the main component of the EVA hot melt adhesive film is vinyl acetate copolymer.

[0012] Furthermore, the surface density of the bulletproof curved panel is ≤15kg / m³. 2 It can withstand 6 rounds of M80 bullets, resulting in a dent of ≤40mm.

[0013] A method for preparing a ballistic curved panel that meets the NIJ0101.06 Level 3 standard includes the following steps:

[0014] (1) Assemble the curing layer, ultra-high molecular weight polyethylene bulletproof curved panel, hot melt adhesive film layer and anti-dent material layer in sequence, put them into a sealed bag and seal them, and then vacuum them;

[0015] (2) Place the above-mentioned sealed bag into a four-column hydraulic press for heat sealing;

[0016] (3) Spray paint onto the heat-sealed material, air dry and let it stand to form a bulletproof curved panel.

[0017] Furthermore, the operating process of the four-column hydraulic press in step (2) is as follows:

[0018] Within 0-30 minutes, the pressure reaches 18 MPa and the temperature reaches 75-80℃;

[0019] 31-45 minutes, maintain temperature and pressure for 15 minutes;

[0020] 45-55 minutes, pressure reaches 22 MPa, temperature reaches 115-125℃;

[0021] 56-120 min, maintain temperature and pressure for 65 minutes;

[0022] 121-180 minutes, release the pressure and lower the temperature to room temperature.

[0023] Furthermore, in step (3), the paint is black polyurea component B: black polyurea component A = 1.2:0.8; the nozzle diameter for spraying is Ф1.2mm, and the spraying distance is 550~630mm.

[0024] Furthermore, in step (3), the paint spraying temperature is 65~70℃, and the air drying and settling time is 5~6 hours.

[0025] The beneficial effects of this invention are:

[0026] (1) In terms of preparation process, this method is simple, easy to operate, and highly efficient;

[0027] (2) In terms of effectiveness, the surface density of the bulletproof curved panel produced by this method does not exceed 15 kg / m³. 2 It can withstand 6 M80 bullets and the dent should not exceed 40mm (refer to NIJ0101.06 Level III standard), which is at an advanced level in China. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the present invention. 1 is the curing layer, 2 is the ultra-high molecular weight polyethylene bulletproof curved panel, 3 is the hot melt adhesive film, and 4 is the anti-dent material. Detailed Implementation

[0029] Example 1

[0030] (1) Preparation of ultra-high molecular weight polyethylene bulletproof curved panel

[0031] Select an areal density of 110 g / m³ 2 The ultra-high molecular weight polyethylene nonwoven fabric is laid on the workbench, requiring the fabric to be laid flat and each layer to overlap.

[0032] Using specialized software for clothing design, the pattern is automatically laid out and cut according to the dimensions of the bulletproof inserts;

[0033] The cut material sheets are promptly transported to the counterweight room for balancing, with the areal density controlled within the range of 12.4-12.5 kg / m³. 2 .

[0034] (2) Select anti-sag materials and hot melt adhesive film

[0035] Choose a thickness of 0.3mm and a surface density of 300g / m³. 2 Carbon fiber woven fabric was used as the anti-dent material; EVA hot melt adhesive film was selected.

[0036] (3) Enter the four-column hydraulic press for heat sealing

[0037] Using ultra-high molecular weight polyethylene fiber as the curing layer, bulletproof curved panel, hot melt adhesive film, and anti-dent material, according to... Figure 1 The structure is assembled and then placed on the loading platform. The assembled raw materials are sealed with a sealing bag, and then a vacuum operation is performed to confirm that the sealing bag is not damaged. Finally, the sealing bag is placed into a four-column hydraulic press for heat sealing.

[0038] The operating process of a four-column hydraulic press is as follows:

[0039] Within 0-30 minutes, the pressure reached 18 MPa and the temperature reached 78℃;

[0040] 31-45 minutes, maintain temperature and pressure for 15 minutes;

[0041] 45-55 minutes, pressure reaches 22 MPa, temperature reaches 120℃;

[0042] 56-120 min, maintain temperature and pressure for 65 minutes;

[0043] 121-180 minutes, release the pressure and lower the temperature to room temperature;

[0044] A semi-finished product was obtained.

[0045] (4) Bulletproof curved panel spraying molding

[0046] Preparation: Paint (black polyurea component B): Hardener (black polyurea component A) = 1.2:0.8. Heat the paint to 68℃ using equipment and begin spraying. Use a nozzle diameter of Ф1.2mm and a spraying distance of 600mm to evenly spray the product surface. Finally, allow it to air dry and stand for 5.5 hours to form the bulletproof plate.

[0047] Example 2

[0048] Choose a thickness of 0.2mm and a surface density of 200g / m³. 2 Using aramid nonwoven fabric as the dent reduction material, and with the other conditions the same as in Example 1, a bulletproof curved panel was obtained.

[0049] Example 3

[0050] Choose a surface density of 120 g / m³ 2 Ultra-high molecular weight polyethylene (UHMWPE) bulletproof curved panels were prepared using UHMWPE non-woven fabric, with other procedures the same as in Example 1, to obtain bulletproof curved panels.

[0051] Example 4

[0052] Select a TPU type hot melt adhesive film, and follow the same procedure as in Example 1 to obtain a bulletproof curved panel.

[0053] Example 5

[0054] The operating process of a four-column hydraulic press is as follows:

[0055] Within 0-30 minutes, the pressure reaches 18 MPa and the temperature reaches 75℃;

[0056] 31-45 minutes, maintain temperature and pressure for 15 minutes;

[0057] 45-55 minutes, the pressure reaches 22 MPa, and the temperature reaches 115℃;

[0058] 56-120 min, maintain temperature and pressure for 65 minutes;

[0059] 121-180 minutes, release the pressure and lower the temperature to room temperature;

[0060] The rest is the same as in Example 1, to obtain a bulletproof curved panel.

[0061] Comparative Example 1

[0062] Polybenzobisoxazole, a microfiber material, was selected as the dent reduction material, and the rest was the same as in Example 1 to obtain a bulletproof curved panel.

[0063] Comparative Example 2

[0064] An epoxy dicyclopentadiene epoxy wetting agent was used instead of a hot melt adhesive film, and the rest was the same as in Example 1.

[0065] Comparative Example 3

[0066] Step (3) uses autoclave molding technology, and the rest is the same as in Example 1.

[0067] The surface density of the bulletproof curved panels obtained in Examples 1-5 and Comparative Examples 1-3, the number of M80 bullets they resisted, and the dent distance are statistically shown in Table 1 below.

[0068] Table 1. Test Results of Bulletproof Curved Panels

[0069]

[0070] Based on the test results of the bulletproof curved panels above, the bulletproof curved panel obtained by selecting polybenzobisoxazole microfiber material as the dent reduction material has a higher surface density than that of Example 1, and the dent distance resisted by 6 M80 bullets is also increased; the bulletproof curved panel obtained by using epoxy dicyclopentadiene epoxy impregnating agent instead of hot melt adhesive film has a higher surface density than that of Example 1, and the dent distance resisted by 6 M80 bullets is also increased; the difference in surface density between the bulletproof curved panels of Comparative Example 3 and Example 1 indicates that the most suitable method for manufacturing the bulletproof curved panel of this application is to use a four-column hydraulic press.

[0071] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of protection of this application is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0072] One or more embodiments in this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this application should be included within the protection scope of this application.

Claims

1. A bulletproof curved panel that meets the NIJ0101.06 Level 3 standard, characterized in that, From the outside in, the structure comprises a curing layer, an ultra-high molecular weight polyethylene bulletproof curved panel, a hot melt adhesive film layer, and a dent-reducing material layer. The dent-reducing material layer is made of one of the following: carbon fiber woven fabric, aramid woven fabric, carbon fiber nonwoven fabric, aramid nonwoven fabric, carbon fiber-aramid blended woven fabric, or carbon fiber-aramid blended nonwoven fabric. The areal density of the dent-reducing material is 150-450 g / m³. 2 The thickness is 0.2-0.5mm; The method for preparing the bulletproof curved panel includes the following steps: (1) Assemble the curing layer, ultra-high molecular weight polyethylene bulletproof curved panel, hot melt adhesive film layer and anti-dent material layer in sequence, put them into a sealed bag and seal them, and then vacuum them; (2) Place the above-mentioned sealed bag into a four-column hydraulic press for heat sealing; (3) Spray paint onto the heat-sealed material, air dry and let it stand to form a bulletproof curved panel; The operating process of the four-column hydraulic press in step (2) is as follows: Within 0-30 minutes, the pressure reaches 18 MPa and the temperature reaches 75-80℃; 31-45 minutes, maintain temperature and pressure for 15 minutes; 46-55 minutes, pressure reaches 22 MPa, temperature reaches 115-125℃; 56-120 min, maintain temperature and pressure for 65 minutes; 121-180 minutes, release the pressure and lower the temperature to room temperature.

2. The bulletproof curved panel as described in claim 1, characterized in that, The ultra-high molecular weight polyethylene bulletproof curved panel has a surface density of 105-125 g / m³. 2 It is made of ultra-high molecular weight polyethylene nonwoven fabric.

3. The bulletproof curved panel as described in claim 2, characterized in that, The ultra-high molecular weight polyethylene nonwoven fabric, after being laid out, cut, weighed, and pressed, achieves an areal density of 12.4-12.5 kg / m². 2 Ultra-high molecular weight polyethylene bulletproof curved panel.

4. The bulletproof curved panel as described in any one of claims 1-3, characterized in that, The cured layer is made of one of aramid, glass fiber or ultra-high molecular weight polyethylene fiber.

5. The bulletproof curved panel as described in any one of claims 1-3, characterized in that, The hot melt adhesive film layer is one of PO, TPU or EVA.

6. The bulletproof curved panel as described in any one of claims 1-3, characterized in that, The bulletproof curved panel has a surface density of ≤15kg / m³. 2 It can withstand 6 rounds of M80 bullets, resulting in a dent of ≤40mm.

7. The bulletproof curved panel as described in claim 1, characterized in that, In step (3), the paint spraying temperature is 65~70℃, and the air drying and settling time is 5~6 hours.

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