KR20240015537A - Bulletproof plate - Google Patents

Abstract

The present invention provides a bulletproof plate formed by stacking a plurality of unit sheets each having a plurality of protrusions on the surface. The bulletproof plate according to the present invention increases the possibility of diagonal impact when an impact object such as a bullet is hit on the surface, and is also effective in absorbing shock by performing a cushioning function by forming a space between unit sheets.

Description

Bulletproof plate{BULLETPROOF PLATE}

The present invention relates to a bulletproof plate, and more specifically, to a bulletproof plate in which unit sheets with a plurality of protrusions are stacked to increase shock absorption when hit and suppress penetration of a warhead.

It is widely known about fiber bulletproof bodies using high-strength fibers. The bulletproof body is typically formed into a precursor sheet by laminating fiber layers oriented in a single direction, and then, at the final stage, is manufactured into a finished product such as a bulletproof vest or bulletproof helmet.

For example, Patent Document 1 discloses a sheet-shaped bulletproof structure constructed by stacking a plurality of fiber sheets made of aramid fiber bundles. As another example, Patent Document 2 discloses a bulletproof molded product manufactured by laminating layers of UHMWPE fibers aligned in a single direction. As another example, Patent Document 3 discloses a hybrid body armor manufactured by alternately laminating sheets of bulletproof fabric containing aramid fibers and carbon nanotubes.

The above-described fiber-based bulletproof plates still have the problem of being vulnerable to high-impact warheads fired from rifles, etc. For this reason, bulletproof plates made of ceramic or metal are used as alternatives to fiber materials to protect against high impacts. For example, Patent Document 4 discloses a bulletproof material manufactured by plastic processing ceramic balls. However, because bulletproof bodies made of ceramic or metal weigh a lot, it is still difficult to use them as materials for bulletproof vests.

Accordingly, the present inventors tried to solve the known problems of the bulletproof materials, and as a result, when changing the surface shape of the conventional fiber material bulletproof precursor sheet to facilitate shock absorption, the shock absorption ability of the bulletproof body made of fiber material was improved while The present invention was completed by focusing on the ability to maintain the inherent lightness.

Patent Document 1: KR 2014-0037548A Patent Document 2: KR 2020-0101410A Patent Document 3: KR 2134696B Patent Document 4: KR 2011-0015345A

The purpose of the present invention is to provide a bulletproof plate and bulletproof structure made of fiber material with improved shock absorption ability and lightness,

In order to achieve the above object, the present invention provides a bulletproof plate formed by stacking a plurality of unit sheets having a plurality of protrusions on the surface.

The protrusion formed on the fiber sheet may be any one selected from the group consisting of a hemisphere, a combination of a hemisphere and a cylinder, a polygonal edge shape, and a combination of a polygonal edge and a polygonal pillar.

The space created by the protrusion may be filled with a shock-absorbing auxiliary material.

A back plate may be added to the rear of the unit sheet to prevent the shock absorbing auxiliary material from flowing.

The unit sheet may be made of high-strength fiber material.

The fiber material is, for example, from the group consisting of aramid fiber, carbon fiber, ultra high molecular weight polyethylene fiber (UHMWPE fiber), and polybenzoxazole (PBO) fiber. There may be more than one selected.

In addition, the present invention provides a bulletproof structure in which a plurality of the bulletproof plates are stacked.

In the bulletproof structure, the centers of the protrusions formed on the upper bulletproof plate and the centers of the protrusions formed on the lower bulletproof plate may be stacked in a manner that is offset with respect to a vertical line perpendicular to the surface formed by the bulletproof plates.

The shield according to the present invention has protrusions formed on the unit sheet, which can increase the possibility of diagonal impact when an impact object such as a bullet is hit on the surface. In addition, the shock absorption of the protrusions can enable a cushion function to absorb shock. It is effective for

Figure 1 is a schematic perspective view of a bulletproof plate 100 according to the present invention.
Figure 2 is a side cross-sectional view schematically showing the protrusions 11 formed on the individual unit sheets 10 forming the bulletproof plate 100.
3A and 3C exemplarily show the shape of the protrusions 11 formed on the unit sheet 10 of the present invention.
Figure 4 is a side cross-sectional view of the flow prevention back plate 20 added to the unit sheet 10.
Figure 5 is a schematic diagram illustrating the manner in which an impact body impacts the surface of the bulletproof plate 100 or the unit sheet 10 according to the present invention.
Figure 6 is a schematic diagram showing an example in which the protrusion 11 is formed on the upper surface of the unit sheet 10.
Figure 7 is a schematic diagram illustrating a method of forming the protrusion 11 on the bulletproof plate 100 or the unit sheet 10 according to the present invention.
Figures 8a and 8b are schematic diagrams showing a bulletproof structure 200 formed by stacking bulletproof plates.

The present invention provides a bulletproof plate formed by stacking a plurality of unit sheets each having a plurality of protrusions formed on the surface.

Hereinafter, a bulletproof plate according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 is a schematic perspective view of the fire break plate 100 according to the present invention. The bulletproof plate 100 according to the present invention is formed by stacking unit sheets 10 with a plurality of protrusions 11 formed on the surface.

In the present invention, the unit sheet 10 is a fiber sheet made of a high-strength fiber material. The fiber material is, for example, a group consisting of aramid fiber, carbon fiber, ultra high olecular weight polyethylene fiber (UHMWPE fiber), and polybenzoxazole (PBO) fiber. Fibers manufactured from one or more materials selected from may be used.

In a preferred embodiment of the present invention, the unit sheet 10 may be a fabric-shaped structure composed of the fiber materials laminated. For example, in an embodiment of the present invention, the shape and structure of the unit fiber sheets for manufacturing the bulletproof structure have a constant rotation angle difference between the unidirectional fiber sheets as disclosed in Patent Document 1, Patent Document 2, or Patent Document 3. It may be laminated while having .

Meanwhile, the unit fiber sheets 10 may be impregnated or bonded with an adhesive material. The impregnation or adhesive material includes, for example, epoxy resin, polyvinyl acetal resin, polyamide resin, polyimide resin, polyamide-imide resin, etc., but is not limited thereto.

In the present invention, there is no particular limitation on the number of unit sheets 10 constituting the bulletproof plate 100, so the unit sheets 10 can be stacked as needed depending on the required bulletproof performance. For example, in one embodiment of the bulletproof plate 100 of the present invention, the unit sheets 10 are stacked in two or more, or 5 or more, or 10 or more sheets to form the bulletproof plate 100.

Typically, the unit sheet 10 obtained from aramid fiber, carbon fiber, etc. has a thickness of about 0.1 to 1 mm, and in this case, the bulletproof body 100 of the present invention has 2 to 100 unit sheets 10. They are stacked to form the bulletproof plate 100. In this way, the unit sheets 10 are stacked so that the bulletproof plate 100 can be formed to have a thickness of 0.1 to 50 mm depending on the end use or product standard.

Figure 2 is a side view exemplarily showing the protrusions 11 formed on the individual unit sheets 10 forming the bulletproof plate 100. Figure 2 shows that the protrusion 11 has a hemispherical shape.

In the present invention, the shape of the protrusions 11 formed on the unit sheets 10 is not limited to the hemispherical shape illustrated in Figure 2, but is formed by the surface A' in contact with one surface of the protrusion or a portion of the protrusion and the surface formed by the unit sheet. If (A) has a form that can have at least one surface that is not in equilibrium with each other, it can be applied to the present invention.

3A to 3C show other shapes of protrusions formed on the unit sheet 10 of the present invention in addition to the hemispherical shape. For example, in another embodiment of the present invention, the protrusion may be a combination of a cylinder and a hemisphere (3a), a cone shape (3b), or a combination of a cone and a cylinder (3c). In another embodiment, the protrusion may be in the form of a polygonal pyramid such as a triangular pyramid or square pyramid, or may be a combination of these and a polygonal prism such as a triangular prism or square prism (not shown).

In a preferred embodiment of the present invention, at least one of the unit sheets 10 forming the bulletproof plate 100, preferably the unit sheet forming the lowermost surface, has an empty space 12 created by the protrusion 11. ) can be filled with shock absorbing auxiliary materials to increase the absorption or dispersion effect of the shock applied by the impact body. Shock absorbing auxiliary materials used for this purpose include, for example, fibrous materials such as carbon fiber and aramid, sand, and liquid bulletproof materials. The shock absorbing auxiliary material is used for the purpose of minimizing the change in shape of the protrusion and absorbing the impact energy when an impact object impacts the protrusion.

In an embodiment of the present invention, when sand or fiber material is used as a shock absorbing auxiliary material, the shock absorbing auxiliary material may be used in a form impregnated with resin to prevent the shock absorbing auxiliary material from flowing. For example, the impregnation resin used for this purpose may be the same as the resins used to bond unit fiber sheets.

Another means to prevent the flow of the shock absorbing auxiliary material is to use a back plate to prevent the flow. Figure 4 is a side cross-sectional view of the flow prevention back plate added to the unit sheet. Referring to Figure 4, the back plate 20 is added to the surface opposite to the protrusion 11 formed on the unit sheet 10 to complete the bulletproof plate 100'. At this time, the space 12 formed by the protrusion 11 and the back plate 20 of the unit sheet 10 may be filled with the shock absorbing auxiliary material 15 alone or in a form impregnated with an adhesive resin.

Meanwhile, the back plate 20 may be, for example, made of the same material as the unit sheet 10 or may be made of a different material. For example, if the back plate 20 is made of the same material as the unit sheet 10, they can be bonded using the same adhesive material used to bond the unit sheets. Meanwhile, examples of other materials used as the back plate 20 may be, for example, plastic films such as polyethylene, polypropylene, polyester, and polyamide. The back plate 20 made of these materials can also be bonded to the unit sheet 10 using known adhesive materials and methods.

Of course, the above-mentioned 'impregnation' and 'back plate' can be used simultaneously or individually as a means to prevent the flow of the shock absorbing auxiliary material.

In addition, the bulletproof plate according to the present invention may have a front plate additionally attached to the side opposite to the back plate based on the unit sheet, if necessary. The front plate is intended to prevent the shape of the protrusion from being exposed on the front of the bulletproof body, and its material may be the same as that used for the unit sheet, or a different material may be used.

When the unit sheet 10 constituting the bulletproof plate 100 has a protrusion 11 on its surface, there is an advantage compared to when the unit sheet 10 is flat.

The first advantage of providing the unit sheet 10 with the protrusion 11 is that it increases the possibility of diagonal impact when the surface is hit by an impact object such as a bullet. Figure 5 is a schematic diagram illustrating the manner in which an impact body impacts the surface of the unit sheet 10 according to the present invention. Referring to FIG. 5 , even if the impact body is incident in the direction (a) perpendicular to the surface of the unit sheet 10, if it impacts the protrusion 11 formed on the surface, the impact body will be struck diagonally on the protrusion 11. Upon impact, the direction changes (a') and the direction of the warhead is bent, and accordingly, the amount of impact impacting the bottom 13 of the unit sheet 10 may be less than when impacting vertically.

The second advantage of providing the unit sheet 10 with the protrusion 11 is that, as the unit sheets 10 are provided with the protrusion 10, shock can be absorbed inside the protrusion 11. The space performs a kind of cushioning function and helps absorb shock.

The protrusion 11 may be arranged in various shapes on the unit sheet 10.

Figure 6 is a schematic diagram showing an example of the top view of the unit sheet 10 in which the protrusion 11 is formed. As shown in FIG. 6, in one embodiment of the present invention, the protrusions may be arranged in a grid form at the intersection of vertical and horizontal lines that are vertical up and down and left and right and have regular intervals of arbitrary length. What is shown is that the shape of the unit grid formed by vertical and horizontal lines is square, but the shape of the unit grid is not limited to this and may be rectangular or diamond-shaped (not shown).

In another embodiment of the present invention, the protrusions 11 formed on the unit sheet 10 may be arranged in a random arrangement. That is, a plurality of protrusions may be arranged in an irregular manner with spacing between adjacent protrusions (not shown).

Forming the protrusion 11 on the bulletproof plate 100 or the unit sheets 10 constituting the bulletproof plate can be done according to a known method. Figure 7 is a schematic diagram illustrating a known method of forming the protrusion 11 on the bulletproof plate 100 or the unit sheet 10 according to the present invention. Referring to FIG. 7, unit sheets (fiber material sheets) without protrusions are stacked as necessary on a mold in which engraved protrusions of a shape complementary to the protrusions are formed (with or without adhesive material). , the bulletproof plate 100 according to the present invention is manufactured by pressing at room temperature or high temperature and then releasing it.

In Figure 7, a case where protrusions are formed on a plurality of unit sheets at once is shown, and in another embodiment of the present invention, protrusions are formed on individual unit sheets, and then the unit sheets with the protrusions formed are stacked and glued to form a bulletproof plate. It can be completed.

The bulletproof plate 100 of the present invention can be used alone as a bulletproof body, and, if necessary, can be used as a bulletproof structure in which a plurality of the bulletproof plates are stacked. In this case, it is preferable that the centers of the protrusions formed on the upper bulletproof plate and the centers of the protrusions formed on the lower bulletproof plate are offset (so as not to overlap) with respect to a vertical line perpendicular to the surface formed by the bulletproof plate.

Figures 8a and 8b are schematic diagrams showing a bulletproof structure formed by stacking bulletproof plates. For example, in one embodiment of the bulletproof structure of the present invention, as schematically shown in FIG. 8A, the protrusions 11 formed on the upper bulletproof plate 100 have an arbitrary length L at intervals in the up and down and left and right directions. When arranged in a regular grid, the upper bulletproof plates 100 and the lower bulletproof plates 100' can be stacked in a form where they are alternately arranged up and down by a length (L') different from the grid length (i.e. L≠L)

Another form in which the protrusions formed on the bulletproof plates (or unit sheets) are stacked so that the centers are offset, for example, as shown in Figure 8b, the upper and lower bulletproof plates are formed based on an arbitrary central axis perpendicular to the upper and lower bulletproof plates. The bulletproof plates (100, 100') may be stacked in such a way that an arbitrary axis (plane axis: C, C') parallel to the plane (100, 100') rotates at a certain angle.

Figures 8a and 8b illustrate the case where two bulletproof plates are stacked to obtain a bulletproof structure, but even when a bulletproof structure is manufactured by stacking three or more bulletproof plates, the relationship between neighboring bulletproof plates is explained above. It's the same as doing it.

Another form in which the protrusions formed on the unit sheets of the bulletproof plate are stacked so that the centers are misaligned. For example, if the protrusions are randomly arranged on the unit sheet, the protrusions formed on the unit sheets stacked up and down are When viewed from the direction perpendicular to the unit sheet surface, there is a low possibility of overlapping.

Of course, after stacking the above-described bulletproof plates 100 and 100', the laminated bulletproof plates can be bonded. Bonding of bulletproof plates may follow known methods. For example, unit bulletproof plates (100, 100') are stacked and then compressed at room temperature or high temperature using a press, etc., or adhesive materials such as epoxy resin, polyvinyl acetal resin, polyimide resin, polyimide resin, etc. It can be applied and then laminated by pressing at room temperature or high temperature.

The bulletproof plate according to the present invention is made of a fiber material and maintains lightness, while having superior shock absorption compared to bulletproof plates conventionally made of fiber material. The lightness of a bulletproof body is an important factor for operating structures such as bulletproof vests and vehicles equipped with them within the load limit. Therefore, the bulletproof plate according to the present invention can be used to mold or manufacture conventional bulletproof bodies made of fiber materials, such as bulletproof vests and bulletproof helmets.

The invention described above should be understood as illustrative and not restrictive. The scope of the present invention should be construed as including the meaning and scope of the patent claims described below rather than the detailed description above, and all changes or modified forms derived from the equivalent concept thereof are included in the scope of the present invention.

100, 100`... bulletproof plate
200, 200`... bulletproof structure
10, 10`... Unit sheet
11... protrusion
13... Bottom part
15... Shock absorption auxiliary material
20... back panel

Claims (12)

A bulletproof plate formed by stacking a plurality of unit sheets with a plurality of protrusions on the surface. The bulletproof plate according to claim 1, wherein the protrusion formed on the fiber sheet is one selected from the group consisting of a hemisphere, a combination of a hemisphere and a cylinder, a polygonal edge type, and a combination of a polygonal edge and a polygonal column. The bulletproof plate according to claim 2, wherein the space created by the protrusion is filled with a shock absorbing auxiliary material. The bulletproof plate of claim 3, wherein the shock absorbing auxiliary material is at least one selected from the group consisting of carbon fiber, aramid fiber, sand, and liquid bulletproof material. The bulletproof plate according to claim 3 or 4, wherein the shock absorbing auxiliary material is impregnated with resin. The bulletproof plate of claim 1, wherein a rear plate is further added to the rear of the unit sheet. The bulletproof plate according to claim 1, wherein the unit sheet is made of a high-strength fiber material. The method of claim 7, wherein the fiber material consists of aramid fiber, carbon fiber, ultra high olecular weight polyethylene fiber (UHMWPE fiber), and polybenzoxazole (PBO) fiber. A bulletproof plate, characterized in that it is one or more selected from the group. A bulletproof structure in which the bulletproof plates of paragraph 1 are laminated. The bulletproof structure according to claim 9, wherein the centers of the protrusions formed on the upper bulletproof plate and the centers of the protrusions formed on the lower bulletproof plate are offset with respect to a vertical line perpendicular to the surface formed by the bulletproof plates. The method of claim 9, wherein when the protrusions formed on the laminated bulletproof plates are arranged in a grid shape with a certain length (L) at intervals in the up and down and left and right directions, the laminated bulletproof plates have a length (L′) different from the grid length. A bulletproof structure, characterized in that it is stacked in a form that is arranged vertically in a staggered manner. The method of claim 9, wherein the bulletproof plates are stacked in such a way that an arbitrary axis parallel to the plane of the upper and lower unit sheets rotates at a certain angle based on an arbitrary central axis perpendicular to the upper and lower sheets. A bulletproof structure.