JPH0527040B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] This invention aims to significantly improve the quality and weight reduction of bulletproof materials by interposing a fibrous layer between a titanium alloy plate and a fiber-reinforced resin plate. The present invention relates to a bulletproof material having a laminated structure. [Prior Art] Conventionally, bulletproof shields carried by humans have dimensions of, for example, 1100 mm in height, 450 mm in width, and 6 mm in thickness, and are made of steel with a density of approximately 7.8 g/ ^cm3. board is used. [Problems to be Solved by the Invention] However, since conventional bulletproof materials are made of steel plates, they are heavy at about 30 kg, making them inconvenient to carry. The present invention was made to solve these problems, and aims to provide a bulletproof material that is light enough to be easily carried by humans and has sufficient bullet resistance. [Means for Solving the Problems] The present invention has a structure in which a titanium alloy plate and a fiber-reinforced resin plate are laminated in at least two layers, and a fibrous layer is provided between the titanium alloy plate and the fiber-reinforced resin plate. It is a bulletproof material consisting of a composite material with a unit volume weight of 0.9 to 2.5 g/cm ³ . [Function] The bulletproof material of the present invention combines at least two or more layers of a titanium alloy plate, which is a material with a lower density than a steel plate, and a fiber-reinforced resin plate, with a fibrous layer interposed in between, to form a unit. Volume weight from 0.9
It is lightweight at 2.5g/ ^cm3 , making it easy for humans to carry, and has sufficient bullet resistance. The bulletproof material of the present invention can be combined in various ways as long as it is a composite body in which at least two or more layers of titanium alloy plates and fiber-reinforced resin plates are laminated. For example, the outermost layer is a titanium alloy plate with high strength, the second layer is a fiber-reinforced resin plate that absorbs impact energy, and the innermost layer is a titanium alloy plate with high strength and whose shape does not easily change due to impact. is the most suitable, and it is also possible to combine a fiber-reinforced resin plate for the outermost layer and a titanium alloy plate for the second layer and the innermost layer. When making a bulletproof shield using the bulletproof material of the present invention, it may be made from one laminated structure plate as described above, having dimensions of, for example, 1100 mm in height and 450 mm in width.
The frame structure of the shield is made of a titanium alloy plate, and the bulletproof material is made of, for example, 300 mm in height and 300 mm in width, or 100 mm in height and width.
It may also be a structure in which the pieces are divided into pieces of 100 mm or the like and incorporated into the frame structure of the shield. The titanium alloy plate used has a density of about 4.5 g/cm ³ and a tensile strength of 90 Kg/mm ² or more. In addition, the thickness of the titanium alloy plate can be 0.8 to 5.0 mm due to lamination, and 1.5 to 5.0 mm.
A thickness of 2.5 mm is preferred. The fiber-reinforced resin board has a density of approximately 1.3 to 1.8 g/cm ³ , and a fiber-filled resin board made of alternating layers of glass fibers, glass cloth, etc. can be used, but the tensile strength is 280 kg/mm ² or more. A certain aromatic polyamide fiber-filled resin plate can be used most preferably. The thickness of the fiber-reinforced resin board can be 2.0 to 15 mm.
The preferred thickness is 3.5-7.0 mm. A fibrous layer is inserted between the adjacent titanium alloy plate and the fiber reinforced resin plate. This is an important layer that acts as a cushion when impacted by a bullet and as an escape route for compressed air caused by shock waves.
Porous cow wool (felt) having a bulk density of 0.1 to 0.5 g/cm ³ , aromatic polyamide fiber, glass fiber, alumina fiber, rock fiber, etc. can be used. The thickness of the fibrous layer can be 2.0 to 20 mm, and the preferred thickness is 5.0 to 10 mm. If the current portable bulletproof shield (height 1100 mm, width 450 mm) is made from the bulletproof material of this invention, it will weigh 18 to 20 kg (approximately 60 kg compared to the current steel plate's weight of approximately 30 kg).
% weight). [Example] The present invention will be explained in more detail based on the following example. Example 1 Titanium alloy plates, fiber-reinforced resin plates, etc. with dimensions of 300 mm in height and 300 mm in width and thicknesses shown in Table 1 below were prepared, and the outermost layer was made of titanium alloy plate and the second layer was made of aromatic polyamide. Bulletproof materials A and B with a structure in which a fiber-filled resin plate and a titanium alloy plate are laminated as the innermost layer, bulletproof material C in a structure in which a glass fiber-filled resin plate is laminated as the outermost layer and a titanium alloy plate as the innermost layer, and comparison. As an example, we made each of the current steel plates. These bulletproof materials and steel plates are incorporated into a shield with a frame structure made of titanium alloy plate with a height (a in the figure) of 1100 mm, a width (b in the figure) of 600 mm, and a thickness of 2.5 mm. I used it as a shield. Using this bulletproof shield, a live firing test was conducted using live bullets, and the results are shown in Table 1. The details of the live-fire test are as follows: (1) Gun used: No. 12 caliber Browning double-barreled shotgun. (2) Actual firing method: The distance between the bulletproof material and the gun is 10 meters, and the actual firing is performed so that it hits the shield perpendicularly. (3) Live fire bullet: single grain bullet (slug bullet) total weight 41.6g,
Total length 59.2mm, dosage 2.75g (about twice the amount for normal hunting). (4) Bullet: Weight 27.2g, length 17.9mm, outer diameter 18.5mm,
Cross-sectional area 2.29cm ² . (5) Speed: initial speed 509-526m/sec, average value 518m/sec
seconds. (6) Total kinetic energy of the bullet: 418Kg/m. (7) Bullet vitality (kinetic energy ÷ bullet cross-sectional area): 183Kg/m/cm ² (3.6 times that of Colt 45 bullet).

【table】

[Table] Bulletproof materials A, B, and C according to the present invention exhibited bulletproof performance equivalent to that of the steel plate of the comparative example. Example 2 Titanium alloy plates, fiber-reinforced resin plates, etc. with dimensions of 300 mm in height and 300 mm in width and thicknesses shown in Table 2 below were prepared, and the outermost layer was made of titanium alloy plate and the second layer was made of aromatic polyamide. Bulletproof material D with a structure in which a fiber-filled resin plate is laminated with a titanium alloy plate on the innermost layer, Bulletproof material E with a titanium alloy plate as the outermost layer, Bulletproof material F with a resin plate with aromatic polyamide fiber as the outermost layer, and Bulletproof material G was made with only the outer layer being a glass fiber-containing resin plate. Here bulletproof materials E, F, and G
is a comparative example. These bulletproof materials were incorporated into a shield having a frame structure made of a titanium alloy plate with a height of 1100 mm, a width of 600 mm, and a thickness of 2.5 mm, as in Example 1, to form a bulletproof shield. Using this bulletproof shield, a live firing test using live bullets was conducted in the same manner as in Example 1, and the results are shown in Table 2.

【table】

[Table] Bulletproof material D with a laminated structure according to the present invention showed good results, but bulletproof material G with a single structure penetrated with large deformation and breakage, and bulletproof materials E and F showed cracks. Stops the bullet with large deformation,
Monolithic structures have been found to be unsuitable as ballistic materials. [Effect of the invention] As described above, the bulletproof material according to the present invention has the following effects:
At least two titanium alloy plates and a fiber reinforced resin plate
By combining two or more layers and interposing a fibrous layer between them, the weight is reduced to a level that can be easily carried by humans, and the device has sufficient bullet resistance.

[Brief explanation of the drawing]

The figure is a plan view of a shield having a frame structure made of titanium alloy plate used in an embodiment of the present invention. In the figure, a is the height (1100mm) and b is the width (600mm).
mm).

Claims (1)

[Claims] 1. A composite body having a structure in which at least two layers of a titanium alloy plate and a fiber-reinforced resin plate are laminated, and a fibrous layer is inserted between the titanium alloy plate and the fiber-reinforced resin plate. Unit volume weight is 0.9
A bulletproof material characterized by ~2.5g/ ^cm3 .