KR101864045B1 - Transparent bulletproof materials using borosilicate strengthened glass - Google Patents

Abstract

The present invention relates to a bulletproof material using borosilicate reinforced glass, and more specifically, to a transparent bulletproof material using borosilicate reinforced glass, which confirms a bulletproof function in accordance with a bonding order of ion-exchange reinforced borosilicate reinforced glass and a polymer film so as to provide an optimized bonding arrangement of the bulletproof material having excellent impact absorbing energy.

Description

{TRANSPARENT BULLETPROOF MATERIALS USING BOROSILICATE STRENGTHENED GLASS}

The present invention relates to a bulletproof material using borosilicate glass, and more specifically, to a bulletproof material using borosilicate glass, and more specifically, to a bulletproof material having excellent shock absorption energy by confirming the protective performance according to the order of bonding of a boron- To a transparent bulletproof material to which a borosilicate glass is applied.

Transparent bulletproof materials, which play an important role in the defense industry, are special visual windows that are attached to various parts of ground, sea and air maneuvering equipment and transport equipment. They are equipped with protective windows, museums, It is applied to the protection window of financial facilities and is widely used for military and civilian use. These bulletproof materials are made by bonding glass-polymer materials to protect human life and major equipment from external threats. Recently, transparent bulletproof materials applied to armored vehicles and traps require high level of protection, There is a problem that the mobility is decreased and the fuel is increased. Therefore, in order to improve the wartime operational capability, it is required to manufacture a lightweight, thinned transparent bulletproof material while maintaining excellent protection performance.

In the production of transparent bulletproof materials, techniques for producing bulletproof materials by bonding polymer films to ordinary glass have been developed. However, as bulletproof materials have been made thinner and lighter, it is difficult to maintain a certain level of protection against military threats There was a problem.

The evaluation criteria of the ballistic performance of the transparent bulletproof material comply with the National Institute of Justice (NIJ) standard-0108.01 standard of the US Department of Justice, and the protection performance against the military threat requires a level III or higher protection performance. The size of the bulletproof material is based on the manufacture of 300 x 300 mm ² or more in the standard and the 5.56 x 45 mm ² M-16 bullet is subjected to impact at a distance of 15 m, Speed ( V ₅₀ , level III), and the minimum light transmittance standard for the thickness of the bulletproof material should also be satisfied.

The factors affecting the protection performance of the bulletproof material include the order of lamination of the bulletproof material, the type and diameter of the bullet, the type of material to be laminated (glass, PC substrate, PVB, PU, PE, MD film) Mechanical properties.

However, since the impact energy applied to the bulletproof material is continuously increased in accordance with the development of the technology applied to the type of bullet and the firearm, the reinforced glass for the bulletproof material having superior mechanical properties is laminated with the polymer material, It is required to develop an optimum bonding array that exhibits excellent protection performance according to the arrangement.

Korean Patent Publication No. 10-2007-0090697 (2007.09.06)

SUMMARY OF THE INVENTION The present invention has been devised to solve the above-described problems, and it is an object of the present invention to provide a method of manufacturing a bulletproof reinforced glass, The object of the present invention is to provide a bullet-proof material to which a silicate-tempered glass is applied.

The transparent bulletproof material to which the borosilicate glass is applied according to an embodiment of the present invention includes a plurality of borosilicate glass reinforced glass layers; At least one MD layer laminated between the tempered glass layers; And at least one polycarbonate layer laminated on the reinforcing glass layer in a predetermined order, the reinforcing glass layer being disposed behind the MD layer, wherein a thickness of the reinforcing glass layer disposed on the front bulge- And the thickness of each of the tempered glass layers to be disposed.

The bullet-proof material to which the borosilicate-reinforced glass is applied is characterized in that the thickness of each of the tempered glass layers is 2 to 10 mm.

Further, the polycarbonate layer may be stacked on the rear side of the tempered glass layer.

Further, each of the polycarbonate layers may be continuously laminated.

In addition, a PU layer for bonding may be interposed between the polycarbonate layers.

The anti-scattering material may further include a scattering-preventing layer laminated on the rear surface of the bulletproof material.

In addition, the anti-scattering layer may include polyester.

Further, the bulletproof material may be characterized in that a PVB layer for bonding is interposed between the tempered glass layers or between the tempered glass layer and the MD layer.

Further, the bulletproof material may be characterized in that a PU layer for bonding each layer is interposed between the tempered glass layer and the polycarbonate layer.

Also, the bulletproof material is preheated at 90 DEG C and then bonded in an atmosphere of 130 DEG C and 12 bar. The bulletproof material to which the borosilicate glass is applied.

The present invention provides a transparent bulletproof material capable of being thinned and lightweight having excellent shock absorption energy by confirming the protective performance according to the order of bonding of the ion-exchanged reinforced borosilicate glass and the polymer film.

1 is a schematic view showing a method of testing a ballistic performance according to the US Department of Justice (NIJ) standard;
FIG. 2 is a photograph showing a bulletproof material and a back Al-proof film after the evaluation of the bulletproof performance of a transparent bulletproof material to which a borosilicate glass reinforced according to an embodiment of the present invention is applied.
3 is a graph showing the light transmittance of a transparent bulletproof material to which a borosilicate glass is applied according to an embodiment of the present invention.
4 is a view showing a stacking sequence of a transparent bulletproof material to which a borosilicate glass is applied according to an embodiment of the present invention.

It is to be understood that the words or words used in the present specification and claims are not to be construed in a conventional or dictionary sense and that the inventor can properly define the concept of a term in order to describe its invention in the best way And should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and are not intended to represent all of the technical ideas of the present invention. Therefore, various equivalents It should be understood that water and variations may be present. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The bulletproof material to which the borosilicate glass is applied according to the embodiment of the present invention can be constituted by the laminated bonding of the reinforced borosilicate glass substrate and the polymer layer.

At this time, the borosilicate glass used in the present invention, the 80.4SiO ₂ -4.2Na ₂ O-2.4Al ₂ O3-13B alkali ions in the surface composition of the glass has, in the enhanced method of borosilicate ₂ O ₃ (mol%) It is preferable to apply borosilicate glass reinforced by an ion exchange strengthening method which is applied and forms a compressive stress layer, but it is not limited to this, and it will be obvious that it can be strengthened by other methods such as crystallization strengthening or windproof strengthening .

It will be appreciated by those of ordinary skill in the art that the lamination arrangements to be described below can be applied not only to borosilicate glass but also to ordinary borosilicate glass.

The technique for strengthening the borosilicate glass is a general one, so a detailed description thereof will be omitted.

1 is a schematic view showing a ballistic performance test method according to the US Department of Justice (NIJ) standard.

As shown in FIG. 1, the evaluation of the protection performance against the military threat was made by fixing the bulletproof material to the 15 m from the projectile by the US Department of Justice NIJ standard and changing the weight of the M-16 (5.45 x 45 mm ² ) After ballistic performance evaluation, the ballistic limit speed ( V ₀ , V ₅₀ , V ₁₀₀ ) was measured according to the penetration of the Al certified membrane after 15 cm of the bulletproof material. Where V ₀ is the tanδ velocity with a probability of 0% penetration, V ₅₀ is the tanδ velocity with a probability of penetration of 50%, and V ₁₀₀ is the tanδ velocity with a probability of penetration of 100%. NIJ Level III, the protection limit against military threats, has an unladen limit speed of V ₅₀ 838 ± 15 m / s.

The turbulence of the tanzas was measured using an IR speed meter (SPU-3DA, Sugawara Lab. Inc., Japan).

The absorbing energy of the bulletproof material by the bullet is calculated by the following Equation 1, where E is the absorbed energy, m is the weight of the bullet, V _i is the velocity at the time of incidence, V _r is the velocity at the time of penetration, V ₅₀ is the ballistic limit velocity to be.

(수학식1)

(1)

The light transmittance of the bulletproof materials bonded with the borosilicate-reinforced glass and the polymer film was measured using a UV / VIS / NIR spectrophotometer (Jasco, V-570, Japan). The measurement wavelength was 200-800 nm and the scan speed was 400 nm / min.

Table 1 below shows the US Department of Defense (MIL-G-5485D) standard, which is the standard for the required light transmittance for each thickness of the transparent bulletproof material. In order to be used as a transparent bulletproof material, the bulletproof material must satisfy the light transmittance standard for each thickness. According to the US Department of Defense (MIL-G-5485D) standard, a bulletproof material having a thickness of 19 mm requires a transmittance of 78% or more in the visible light region, And it was confirmed at the same time.

Bulletproof material thickness (mm) Light transmittance (%) 12.7 81 19.0 78 25.4 76 31.8 73 38.1 70 44.5 68 50.8 66

The transparent bulletproof material to which borosilicate glass is applied according to an embodiment of the present invention is made of reinforced borosilicate glass and polymer materials (PC, MD, PVB, PU, PE) were laminated in various lamination order and bulletproof performance was evaluated according to the NIJ level III standard. The bullet limit speed ( V ₅₀ ), impact absorption energy and non-absorbed energy according to the lamination arrangement were confirmed by the above- The optimum stacking order indicating the bulletproof performance was confirmed.

We prepared autoclave (KYL-15, Italmatic) for the bonding of transparent bulletproof materials according to the order of bonding designed for ion-exchange strengthened borosilicate glass and PC substrate and various films (PVB, PU, MD, PE) , Itlay) after warming up for 90 (1 hour), and then bonded to autoclave 130 (3 hours, 12 bar).

Table 2 to Table 3 below show the stacking order, thickness, weight and area density of borosilicate-reinforced glass-polymer bonded bulletproof materials.

Example Bulletproof material stacking procedure (from Tanzanite entrance G to PE) Thickness (mm) Weight (kg) Area density (kg / mm ² ) G PVB MD PVB G PU PC PU PC PE A-1 10 0.7 0.2 0.7 3 0.1 2 - - 0.35 17.05 3.01 33.41 A-2 10 0.7 0.2 0.7 2 0.1 3 - - 0.35 17.05 2.92 32.43 A-3 10 0.7 0.2 0.7 2 0.1 2 0.1 3 0.35 19.15 3.14 34.91 A-4 8 0.7 0.2 0.7 3 0.1 2 0.1 3 0.35 18.15 2.94 32.71

Example Bulletproof material stacking procedure (from Tanzanite entrance G to PE) Thickness (mm) Weight (kg) Area density (kg / mm ² ) G PVB MD PVB G PVB G PU PC PU PC PE B-1 10 0.7 0.2 0.7 2 0.7 2 0.1 2 0.35 18.75 3.27 36.36 B-2 8 0.7 0.2 0.7 3 0.7 2 0.1 3 0.35 18.75 3.18 35.38 B-3 8 0.7 0.2 0.7 2 0.7 2 0.1 2 0.1 3 0.35 19.85 3.22 35.73 B-4 3 0.7 0.2 0.7 3 0.7 2 0.1 2 0.1 4 0.35 16.85 2.53 28.15

Polycarbonate (PC, Bayer Inc., Makrolon) substrates are stacked on bulletproof materials with high elasticity and impact absorption energy, and multilayer defense (MD, SKC Inc., SH40, Republic of Korea) Material. At this time, the MD film and the PC substrate play an important role in reducing the impact energy and the rotation speed of the incident taner. Polyvinyl butyral (PVB, Solutia Inc., Saflex® 3G, USA) film is used for glass-glass bonding and polyurethane (PU, Noven Inc., Tecoflex AG-8451, USA) . The polyester (PE, Berkaert Inc., Armorcoat ™ 14 Mil, USA) film, known as safety film, is placed in the last array of bulletproof materials and is a standard for checking penetration of bulletproof materials.

In the following Tables 4 to 5, the light transmittance according to the lamination order of the bulletproof materials bonded with the polymer material by using the reinforced borosilicate glass for each of the examples in the above [Table 2] to [Table 3] Velocity, and non-absorbed energy.

In this case, G indicates reinforced glass under the optimum conditions of ion exchange for each thickness, and PVB (polyvinyl butyral), PU (polyurethane), PC (polycarbonate ), And PE (polyester) represents a polymer material of film or bulk, respectively.

room
Sime Bulletproof material stacking procedure (from Tanzanite entrance G to PE) Thickness (mm) Weight (kg) Area density (kg / mm ² ) Transmittance
(%) Ballistic limit
velocity (m / s) Non-absorbed energy
(J / g) G PVB MD PVB G PU PC PU PC PE A-1 10 0.7 0.2 0.7 3 0.1 2 - - 0.35 17.05 3.01 33.41 86.9 869.9 ( V ₅₀ ) 0.620 A-2 10 0.7 0.2 0.7 2 0.1 3 - - 0.35 17.05 2.92 32.43 86.0 863.8 ( V ₅₀ ) 0.630 A-3 10 0.7 0.2 0.7 2 0.1 2 0.1 3 0.35 19.15 3.14 34.91 84.5 879.8 ( V ₅₀ ) 0.607 A-4 8 0.7 0.2 0.7 3 0.1 2 0.1 3 0.35 18.15 2.94 32.71 84.6 860.8 ( V ₅₀ ) 0.620

Example Bulletproof material stacking procedure (from Tanzanite entrance G to PE) Thickness (mm) Weight (kg) Area density (kg / mm ² ) Transmittance
(%) Ballistic limit
velocity (m / s) Non-absorbed energy
(J / g) G PVB MD PVB G PVB G PU PC PU PC PE B-1 10 0.7 0.2 0.7 2 0.7 2 0.1 2 0.35 18.75 3.27 36.36 86.2 883.0 ( V ₀ ) 0.587 B-2 8 0.7 0.2 0.7 3 0.7 2 0.1 3 0.35 18.75 3.18 35.38 86.4 862.9 (V ₁₀₀₎ - B-3 8 0.7 0.2 0.7 2 0.7 2 0.1 2 0.1 3 0.35 19.85 3.22 35.73 83.9 861.4 ( V ₅₀ ) 0.569 B-4 3 0.7 0.2 0.7 3 0.7 2 0.1 2 0.1 4 0.35 16.85 2.53 28.15 82.0 876.0 (V ₁₀₀₎ -

FIG. 2 is a photograph showing a bulletproof material and a rear Al-certified film after the evaluation of the ballistic performance of the transparent bulletproof material to which the borosilicate glass is applied according to the embodiment of the present invention.

Referring to FIG. 2 and Tables 4 to 5, the bulletproof material to which the borosilicate glass is applied according to the embodiment of the present invention includes a plurality of borosilicate glass reinforced glass layers; At least one MD layer laminated between the tempered glass layers; And at least one polycarbonate layer laminated to the tempered glass layer in a predetermined order and disposed behind the MD layer.

The thickness of each of the borosilicate glass layers is preferably 2 to 10 mm.

As shown in [Table 4] to [Table 5], it is confirmed that the protective performance is improved as the thickness of the tempered glass located on the incidence plane of the bullet is increased. Therefore, in the embodiment of the present invention, It is preferable that the thickness of the tempered glass layer disposed on the incident surface is equal to or greater than the thickness of each of the tempered glass layers disposed on the rear side.

The MD (multilayer barrier, SKC Inc., SH40) layer is formed by compressing a plurality of polyester films. It is preferably disposed at the front side for multiple protection, and is preferably applied simultaneously with the polycarbonate layer , And it is preferable to arrange them in front of the polycarbonate layer at the time of simultaneous application.

Since the polycarbonate (PC, Bayer Inc., Makrolon) layer has elasticity, energy greater than the impact energy incident on the backside due to the influence of the rear spall is transmitted to the rear surface, It is preferable that the reinforcing glass layer is disposed behind the tempered glass substrate because the impact can be transmitted to the reinforced glass layer to be disposed.

Further, as can be seen from Examples B-2 and B-3 of Table 5, the thickness of the PC located on the rear side is smaller than the design of bonding 2 mm or 3 mm thick thin glass disposed in the center of the bulletproof material It is possible to confirm that the protection performance is increased by increasing or increasing the number of blocks.

Therefore, when the polycarbonate layers are formed to have the same thickness, it is preferable that the polycarbonate layers are successively laminated and separated into two or more layers rather than one layer.

Particularly, the bulletproof material of the B-1 laminated array (GMGGP) showed excellent protection performance by protecting all three layers with a protection limit speed of V ₀ 883 m / s. In order to reduce weight, A-2 laminated array (GMGP) has a maximum non-absorbed energy (0.630 J / g) of V ₅₀ 863.8 m / s. Particularly, when the thickness of the front glass was 10 mm from A-1 to A-3, it was possible to secure V ₅₀ for all bulletproof materials. Even if the front glass thickness was reduced to 8 mm as in A-4, , It is possible to manufacture a bulletproof material satisfying the NIJ level III protection standard. Similarly, comparing the stacking order of B-1 and B-2, it can be seen that the protective performance is improved with an increase in the thickness of the glass of the tanzai incidence plane. As a result of comparing the stacking order of B-2 and B-3 It is confirmed that the protection performance improves when the PC is divided and arranged in the rear surface.

Also, referring to [Table 4] to [Table 5], polyvinyl butyral (PVB, Solutia Inc., Saflex® 3G) films can be interposed between the tempered glass layers for tempered glass- -Polyurethane for PC bonding (PU, Noven Inc., Tecoflex AG-8451) may be interposed between the toughened glass layer and the polycarbonate layer. A layer of polyester (PE, Berkaert Inc., Armorcoat ™ 14 Mil) which exhibits high density and good mechanical properties can be placed at the end to prevent scattering.

3 is a graph showing the light transmittance of a transparent bulletproof material to which a borosilicate glass is applied according to an embodiment of the present invention.

(B) is a graph showing the light transmittance measured in Examples A-1 to A-4 bulletproof materials in the visible light region, and Graph (b) And the light transmittance measured in the visible light region of the material.

The light transmittance of the bulletproof materials bonded to various thicknesses was in the range of 82.0-86.9% in visible light and satisfied all of the American Light Emissivity Standards (MIL). Particularly, as the thickness and the bonding amount of the polycarbonate layer bonded together with the reinforced borosilicate glass in the graphs (a) and (b) of FIG. 3 increase, absorption peaks occur at a specific wavelength (670 nm) The light transmittance tends to decrease, which is a matter to be considered when designing a transparent bulletproof material.

4 is a view showing a stacking sequence of a transparent bulletproof material to which a borosilicate glass is applied according to an embodiment of the present invention.

4, it is possible to manufacture a bullet-proof material that ensures thinning and light weight, while ensuring excellent protection performance, when the bulky incidence side glass is thick and the PC is continuously dispersed on the back side of the bulletproof material. Particularly, in Example B-1, when the bulletproof material was thinned to 18.75 mm, the bullet was completely protected by 3 bullets, and V ₀ 883.0 m / s was secured. In Example A-1 bulletproof material, NIJ level III was satisfied.

Although the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, The present invention is not limited thereto. It will be apparent to those skilled in the art that various substitutions, modifications and variations are possible within the scope of the present invention, and it is obvious that those parts easily changeable by those skilled in the art are included in the scope of the present invention .

Claims (10)

A plurality of borosilicate glass layers;
At least one MD layer laminated between the tempered glass layers;
And at least one polycarbonate layer laminated to the tempered glass layer in a predetermined order, the at least one polycarbonate layer being disposed behind the MD layer,
Wherein the reinforcing glass layer has a thickness greater than or equal to a thickness of each of the tempered glass layers disposed on the rear side of the reinforcing glass layer disposed on the front bulge incident surface.
The method according to claim 1,
Wherein each of the tempered glass layers has a thickness of 2 to 10 mm.
The method according to claim 1,
Wherein the polycarbonate layer is laminated behind the tempered glass layer.
The method of claim 3,
Wherein each of the polycarbonate layers is continuously laminated. ≪ RTI ID = 0.0 > 11. < / RTI >
5. The method of claim 4,
And a PU layer for bonding is interposed between the polycarbonate layers.
The method according to claim 1,
Further comprising a shatterproof layer laminated on the back surface of the bulletproof material.
The method according to claim 6,
Wherein the anti-scattering layer comprises polyester. ≪ RTI ID = 0.0 > 11. < / RTI >
The method according to claim 1,
Wherein the bulletproof material comprises a PVB layer for bonding between the tempered glass layers or between the tempered glass layer and the MD layer.
The method according to claim 1,
Wherein the bulletproof material has a PU layer interposed between the reinforced glass layer and the polycarbonate layer for bonding the respective layers.
The method according to claim 1,
Wherein the bulletproof material is preheated at 90 DEG C and bonded in an atmosphere of 130 DEG C and 12 bar after the bulletproof material is applied.

Images