KR200358074Y1 - Protect panel for ballistic attack - Google Patents

Abstract

The present invention relates to the laminated structure of the ballistic bulletin board, and to minimize the weight per unit area of the ballistic plate for bullet protection, while reducing the manufacturing cost of the body armor, and improve the wearing comfort due to weight reduction, ultra-lightweight It is intended to achieve the same anti-ballistic performance effect even if the same weight or less than the anti-ballistic performance when using a high-cost, high-density polyethylene fiber, bulletproof material.

Ballistic plate of the present invention for realizing this, the front plate 10 is provided with a plurality of each of the aromatic polyamide-based fabric 11 is made of sewing on the fabric surface in the form of diamond; As the silol 22 in which the aromatic polyamide fibers or the high density polyethylene fibers are woven into the mesh form, and the impact-absorbing member 21 in which the slender aromatic polyamide fibers or the high density polyethylene fibers are forcibly pressed between the silols. A flex felt layer 20 formed; Aromatic polyamide-based fabric 31 is provided with a plurality of sheets, each of the fabric surface is characterized in that the back plate 30 is made of sewing in the form of a box sequentially.

Description

[PROTECT PANEL FOR BALLISTIC ATTACK}

The present invention relates to a ballistic plate for bulletproof armor, and more particularly, to a ballistic plate laminated structure that can reduce the manufacturing cost while improving the production efficiency while maintaining the defense capacity of the ballistic plate.

In general, the body armor to protect the human body from firearms is composed of a (Garment), ballistic plate and panel (Panal & Panel Cover) and bulletproof plate (Plate).

The ballistic plate, a key part of these body armor, is manufactured according to the NIJ 0101.04 test, the police body armor test standard of the US Department of Justice, the US Department of Justice.

Materials known to be ballistic plates are aromatic polyamide (PARA-ARAMID) and high density polyethylene (HIGH DENSITY POLYETHYLENE).

The aromatic polyamide-based material includes a high elastic fiber Kevlar (trade name of DuPont) or Twaron (trade name of TWARON: TWARON DEIJIN), and a high-density polyethylene film form made of a high molecular compound (DYNEEMA: DSM Corporation's trade name) or SPECTRA (trade name of HONEY WELL Corporation).

Films made of such aromatic polyamide-based high-elastic fibrous fabrics or high-density polyethylene polymer compounds, when the body armor is NIJ IIIA, a plurality of sheets (35-36 sheets) are each independently laminated and wrapped with an outer shell or these fabrics and films By stacking at a suitable ratio to constitute a ballistic plate.

In the production of the ballistic plate must satisfy the following various conditions.

First, bullets must have good defense.

Second, the deformation of the ballistic plate should be considered. In other words, even if the bullet does not penetrate, the rearward deformation should be as small as possible so as not to damage the body by minimizing the impact (NIJ requires 44mm).

Third, the weight and thickness should be taken into consideration.

Fourth, the fit should be good.

Fifth, manufacturing cost should be low.

1A and 1B are explanatory diagrams illustrating a process of absorbing and stopping a bullet impact by a ballistic plate, wherein the bullet 1 that starts from the muzzle is in a high temperature state due to friction with air after firing.

When such a hot bullet 1 comes into contact with the ballistic plate 2, the impact energy generated as shown is diffused in all directions.

Thereafter, the progression of the bullet 1 is suppressed by the ballistic plate 2 so that the progression of the bullet 1 is gradually compressed as shown in FIGS. 1C and 1D to stop the progression in the ballistic plate 2.

Accordingly, the ballistic plate 2 should have a characteristic that absorbs the impact energy well and at the same time well withstands high temperature.

Figure 2 is a longitudinal cross-sectional view showing a process in which the ballistic plate is deformed by bullets in a state where a ballistic plate is attached to the mud plate.

When the bullet 1 is fired on the ballistic plate 2 while the ballistic plate 2 is attached to the mud plate 3, the ballistic plate 2 captures the bullet 1 when the mud plate 3 is driven by the force of the bullet. It can be seen that it deforms while applying impact energy to the initial state.

Therefore, even when the ballistic plate is not penetrated by minimizing the deformation of the ballistic plate 2 due to impact energy, the tensile strength should be sufficiently considered so as not to adversely affect the human body by the deformation of the ballistic plate 2.

Then, the process in which the bullet 1 fired by the ballistic plate 2 will be described in more detail.

When the bullet 1 fired from the gun reaches the ballistic plate 2, the kinetic energy imparts impact energy to the ballistic plate, and the applied impact energy is converted into thermal energy while diffusing waves to generate heat.

At this time, the temperature of the bullet 1 is gradually stopped while exceeding 150 ℃ or more.

As such, the phenomenon in which the bullet 1 is stopped by the ballistic plate 2 is achieved by the following mechanism.

That is, the impact energy is diffused while giving a predetermined deformation to the ballistic plate 2, the speed of the bullet 1 is gradually slowed, and thus the progress of the bullet is stopped.

FIG. 3 shows the dispersion mechanism of the shock wave according to the deformation of the silol constituting the ballistic plate 2 when the ballistic plate 2 is deformed and the impact energy is diffused.

When the silol 4 of the ballistic plate 2 laminated in multiple layers is deformed as shown in FIG. 3, the impact energy is dispersed in all directions along each silol 4, thereby reducing energy.

This impact energy is distributed in all directions along the silol 4, and when the ballistic plate 2 is configured in multiple layers, the above-described operation is made the same in terms of stacking multiple layers.

The aromatic polyamide-based material (PARA-ARAMID), which is the material of the ballistic plate 2, has a high heat resistance compared to the high density polyethylene (HIGH DENSITY POLYETHYLENE) while being heavy, and the high-density polyethylene has a higher tensile strength than the aromatic polyamide-based material, while It has a characteristic of low temperature.

Their performance comparison is as shown in Table 1 below.

Item Aromatic polyamides High density polyethylene Specific gravity (g / ㎡) 1.44 0.97 Heat resistance 427 ~ 482 ℃ 140 ~ 150 ℃ Tensile strength (kg / tex) 237 320 Shock absorption Aromatic polyamides <high density polyethylene

4 is a perspective view showing an enlarged state of a conventional high-density polyethylene film is laminated, the high-density polyethylene film (5) is a unidirectional shield (Unidirectional Shield) is a crossover when the bullet (1) touches the ballistic plate (2) Since there is no fiber strand, the energy dispersing efficiency is much higher than that of the aromatic polyamide.

That is, the high-density polyethylene film 5 has no energy dissipation repulsive force generated by the crossover fiber strands, so that energy is dispersed in only one direction, and thus the shock absorbing force is much larger than that of the aromatic polyamide system.

However, the woven fabrics of the aromatic polyamide-based fabrics are used to sew in a state where they are overlapped in a plural number, whereas the high-density polyethylene film 5 is prohibited to be sewn during the production of ballistic plates.

When impact energy is applied to the ballistic plate 2 and the impact energy is dispersed along the silol 4, as shown in FIG. This is because the ballistic plate penetrates a fatal problem because it cannot be dispersed.

Therefore, in recent years, HYBRIDS (product mixed with aromatic polyamide-based and high-density polyethylene) has been commercialized in consideration of only the advantages of each material.

In other words, the front surface of the ballistic plate 2 is laminated with a plurality of woven fabrics of aromatic polyamide-based woven fabrics that are resistant to impact heat, and a plurality of high density polyethylene films 5 having a high tensile strength and a shock absorbing layer are laminated at the rear. It is the situation which comprises (2).

However, the conventional ballistic plate 2 has a high thermal energy of about 150 ° C. or more, and the defensive force of the ballistic plate is lowered due to the impact heat of the ballistic plate front and the frictional heat of the ballistic plate back caused by the rotation. Since the ballistic plate had to be composed of multiple layers (34 ~ 36 layers), the weight was heavy and the wearing feeling was deteriorated, and the expensive body such as high-density polyethylene was composed of multiple layers, which made it impossible to supply body armor at a low price. There was this.

The present invention has been proposed to improve the above-mentioned problems in the prior art, and minimizes the number of layers forming a ballistic plate without using high-density polyethylene, which was expensive and caused workability during manufacturing, thereby reducing the manufacturing cost of the product. In addition, the object of the present invention is to provide a bulletproof ballistic board for maximizing the fit and activity.

1 is an explanatory diagram showing a process in which bullet impact is absorbed and stopped by a ballistic plate;

Figure 2 is a longitudinal sectional view showing a process in which the ballistic plate is deformed by bullets in a state where a ballistic plate is attached to a mud plate.

3 is a view showing a state in which energy is dispersed along the silol of the ballistic plate.

Figure 4 is an enlarged perspective view showing a state in which a conventional high density polyethylene is laminated.

Figure 5 is a longitudinal cross-sectional view showing a separated state of the ballistic plate of the present invention.

Figure 6 is an enlarged cross-sectional view showing a flex felt layer of the present invention.

<Explanation of symbols for the main parts of the drawings>

10: front panel 20: flex felt layer (FLEX.ARAMID FELT)

21: shock absorbing member 22: silol

30: rear panel 11, 21: aromatic polyamide-based weaving fabric

The object is a front plate which is provided with a plurality of each of the aromatic polyamide-based fabric that is made of sewing on the fabric surface in the form of diamond; A flex felt layer comprising a silol of which aromatic polyamide-based fibers or high-density polyethylene fibers are woven into a net form, and a shock absorbing member of which cotton-like fine aromatic polyamide-based fibers or high-density polyethylene fibers are forcibly pressed into the silol; Aromatic polyamide-based fabric is provided with a plurality of sheets, each fabric surface can be achieved through the laminated structure of the ballistic body ballistic plate characterized in that the back plate made of sewing in the form of a box is sequentially bonded.

Hereinafter, a specific embodiment of the present invention will be described in detail with reference to FIGS. 5 and 6.

The ballistic plate according to the present embodiment is composed of a front plate 10 and a rear plate 30, as shown in Figure 5, and between the flex felt layer 20 for absorbing shock.

The front plate 10 is composed of 12 layers of aromatic polyamide-based fabric 11, the flex felt layer 20 is a silol woven in a mesh form of the aromatic polyamide-based fiber or high-density polyethylene film as shown in FIG. (22), and a shock absorbing member 21 in which a cotton-like thin aromatic polyamide-based fiber or a high density polyethylene film is press-fitted between the silols, and the back plate 30 is formed of an aromatic polyamide-based fabric (31). ) Consists of 11 layers and forms 24 layers in total.

Such ballistic plate is wrapped by a separate shell (not shown).

The front plate 10 is sewn in a diamond shape to increase the tensile strength and increase the diffusion effect when the bullet hits, and the back plate 30 is sewn into a box shape to support the area when the impact is applied have.

Therefore, when bullets of 150 ° C. or more collide, the front plate 10 serves to withstand the instantaneous shock heat, and the flex felt layer 20 quickly absorbs the impact energy due to the impact. 30) serves to prevent the overall deformation of the ballistic plate by minimizing frictional heat and deformation.

Experimental Example

Meanwhile, ballistic plates were laminated in various types and ballistic tests were commissioned by a designated testing company (HPWHITE LABORATORY, INC.) Of the National Institute of Justice (NIJ), and the test results are shown in [Table 2]. Indicated

In the following < Experimental Example 1> is a sample laminated in the order of the polyamide-based fabric (12 ply)-flex felt layer (1 ply)-polyamide-based fabric (11 ply) as in the above application, < Experimental Example 2> polyamide-based fabric (10 ply) -flexel felt (1 ply) -polyamide-based fabric (6 ply) -polyethylene film (1 ply) -flexel (1 ply) -polyamide-based fabric (3 ply) Experimental Example 3 is a polyamide-based fabric (10 layers) -flexel (1 layer) -polyamide-based fabric (6 layers) -polyethylene film (1 layer) -flexel (1 layer) Ply) -polyamide-based fabric (5 ply) in the order, < Experimental Example 4> polyamide-based fabric (6 ply) -flexel (1 ply) -polyamide-based fabric (2 ply)- It is a sample laminated in order of polyethylene film (14 ply) -polyamide-based fabric (4 ply), and < Experimental Example 5> is a polyamide-based fabric (10 ply) -flexel (1 ply) -polyethylene film (1 ply) ) -Flex Site (1 ply) polyamide fabric and the net stacked sample to the (9-fold), <Experiment 6> is a polyamide fabric (10-fold) Flex felt (single-ply) of a polyethylene film (single-ply) -The sample laminated | stacked in order of flex felt (1 layer)-polyamide-based fabric (9 layers) is shown.

Test sample Ballistic threat Result No Weight (1bs) Plies Obliquity (degrees) Caliber (a) Shot Penetration Experimental Example 1 3.64 24 0 .44Mag 4 0 30 .44Mag 2 0 Experimental Example 2 3.72 22 0 .44Mag 4 One 30 .44Mag 2 0 Experimental Example 3 3.74 24 0 .44Mag 4 One 30 .44Mag 2 0 Experimental Example 4 3.63 27 0 .44Mag 4 0 30 .44Mag 2 0 Experimental Example 5 3.68 22 0 .44Mag 4 One 30 .44Mag 2 0 Experimental Example 6 3.70 22 0 .44Mag 4 One 30 .44Mag 2 0 (a) NIJ-STD-1010.04, Level III velocity: 1400-1460 fps (b) Shots in excess of two UNFAIR. Data for fair shots only

As can be seen from the results of each experimental example, the samples of <Experimental Example 1> and <Experimental Example 4> were 100% defense at 0 and 30 degrees of bullet firing, and thus, bulletproof performance could be proved. .

However, in the case of <Experimental Example 4> it can be seen that not only the number of layers is relatively higher than that of <Experimental Example 1>, but also 14 expensive layers of expensive high-density polyethylene film are used, which lowers the cost and manufacturing efficiency of the product.

Therefore, the ballistic plate fabric of <Experimental Example 1> was found to be the most desirable in terms of ballistic performance and production cost, and thus satisfying the Level 3 bulletproof regulations of the US State Department of Justice without using a high density polyethylene film. It can be seen that the minimum number of fabric laminations for the flexible felt layer 20 should include at least 11 layers of the polyamide-based fabric 11 of the front side and at least 10 layers of the polyamide-based fabric 31 of the rear side. In addition, by providing the total number of laminated layers including the flex felt layer 20 not to exceed 24 ply, it is possible to minimize the weight of the ballistic plate, thereby reducing the manufacturing cost of the body armor and maximize the fit. Will be.

[Comparative Example]

In addition, the test results of NIJ-STANDARD-0101.04, which is the total defense standard of the US Department of State's Bulletin Institute for ballistic plate of the present invention, and a comparative example compared with other products of the same class are shown in the following [Table 3].

NIJ Standard This invention DSM Products (High Density Polyethylene) TWARON, DUPONT Products (Aromatic Polyamide) weight Folds weight Folds weight Folds LEVELIIIA 5,245g / ㎡ 24 layers 5,300g / ㎡ 34 ply 6,800g / ㎡ 34 ply LEVELⅡ 4,445g / ㎡ 20 layers 4,500g / ㎡ 29 ply 5,800g / ㎡ 29 ply LEVELⅡA 3,645g / ㎡ 16-ply 3,720g / ㎡ 24 layers 4,800g / ㎡ 24 layers

Looking at the comparison table, it can be seen that in comparison between products, the ballistic plate product of the present invention can satisfy the NIJ standard while reducing the number of layers and product weight compared to other products.

The ballistic plate of the present invention constituting the laminated structure of the fabric as described above, the manufacturing cost can be reduced by minimizing the number of laminated layers compared to the prior art that had to be 30 or more layers of fabric to satisfy the total defense standards In addition, it is possible to improve the wearing comfort of the body armor due to the reduction of the weight per unit area (g / m2).

In particular, the production efficiency of the product can be improved by being able to exhibit the same anti-ballistic performance effect without using a high-density polyethylene film, which is expensive and heavy, and cannot be sewn with other fabrics during manufacturing.

Claims (3)

A front plate 10 provided with a plurality of aromatic polyamide-based fabrics 11 each of which is sewn on the fabric surface in a diamond form; As the silol 22 in which the aromatic polyamide fibers or the high density polyethylene fibers are woven into the mesh form, and the impact-absorbing member 21 in which the slender aromatic polyamide fibers or the high density polyethylene fibers are forcibly pressed between the silols. A flex felt layer 20 formed; Aromatic polyamide-based fabric 31 is provided with a plurality of sheets, each fabric surface laminated structure of ballistic armor ballistic plate, characterized in that the back plate 30 is made of a sewing in the form of a box sequentially . The method according to claim 1, The ballistic plate is provided with the number of laminated layers of the entire fabric including the flex felt layer 20 to 22 to 24 ply, at least 11 ply of the aromatic polyamide-based fabric 11 on the front plate 10, the rear plate 30 A laminate structure of ballistic board for ballistic armor, characterized in that the laminate having at least 10 layers of the aromatic polyamide-based fabric (31) side. delete