CN112484575A

CN112484575A - Bulletproof flashboard with fiber slow release layer

Info

Publication number: CN112484575A
Application number: CN202011410274.XA
Authority: CN
Inventors: 高德谦
Original assignee: Xianghe Xingtong Technology Co ltd
Current assignee: Xianghe Xingtong Technology Co ltd
Priority date: 2020-12-04
Filing date: 2020-12-04
Publication date: 2021-03-12

Abstract

The invention provides a bulletproof flashboard with a fiber slow-release layer, which comprises a crack stop layer, a ceramic ballistic layer and an energy absorption layer which are sequentially arranged along a ballistic direction. Meanwhile, a fiber slow release layer is arranged between the ceramic bullet facing layer and the fiber slow release layer, and the fiber slow release layer is made of a carbon fiber plate. The bulletproof flashboard with the fiber slow-release layer is beneficial to improving the ballistic defense performance of the bulletproof flashboard.

Description

Bulletproof flashboard with fiber slow release layer

Technical Field

The invention relates to the technical field of individual soldier protection, in particular to a bulletproof flashboard with a fiber slow release layer.

Background

Body armor is an important defense device in warfare to reduce the mortality of warriors. Along with the improvement of weapon performance in modern war, the firepower and killing power of the weapon are gradually enhanced, and the power for hurting human body is continuously improved; however, weapons and soldier defense equipment are developing towards high defense and light weight simultaneously, so that high-performance light-weight body armor is more and more important for reducing war casualties, and the bulletproof flashboard is a key part for defending the shooting of firearms in the body armor.

At present, the existing individual body armor is made of soft materials with certain bulletproof capability through cutting and sewing, and the clothes with pockets capable of being placed into bulletproof flashboards are manufactured. And the bulletproof flashboards with different grades are inserted according to different bulletproof grade requirements.

The existing bulletproof flashboard is mostly composed of a silicon carbide or boron carbide ceramic plate and PE (ultra-high molecular polyethylene fiber), and according to tests, the existing bulletproof flashboard can only effectively defend 95-type 5.8mm common bullets, 56-type 7.62 mm-caliber armor-piercing bullets and M80 bullets launched by an M14 rifle at a distance of 15M; and for the shooting of the armor-piercing combustion bomb hit by a 53-type 7.62 mm-caliber gun at a distance of 15m, effective defense protection cannot be realized at all. Therefore, there is a great need for improvements in the ballistic panel to improve its protection against ballistic gun armor-piercing fires within the limits of the specified weight requirements.

Disclosure of Invention

In view of the above, the present invention is directed to a bulletproof insert having a fiber sustained release layer, so as to improve the ballistic protection performance of the bulletproof insert.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

the utility model provides a shellproof picture peg with fibre slowly-releasing layer, includes that the direction sets gradually along the bullet hits the crack stop layer, pottery and meet bullet layer and energy absorption layer, in pottery meet bullet layer with be equipped with fibre slowly-releasing layer between the fibre slowly-releasing layer, fibre slowly-releasing layer adopts the carbon fiber board.

Furthermore, a transition layer is clamped between the ceramic bullet facing layer and the fiber slow release layer, and the crack stop layer, the ceramic bullet facing layer, the transition layer, the fiber slow release layer and the energy absorption layer are bonded through colloid.

Furthermore, the crack-stopping layer and the transition layer are made of aramid fabric.

Further, the colloid comprises one or more of epoxy resin glue, polyurethane resin glue and 704 organic silica gel.

Furthermore, the ceramic bullet facing layer is a boron carbide composite ceramic plate or a silicon carbide composite ceramic plate with the thickness of 5-12 mm.

Further, the energy absorption layer is a high molecular polyethylene plate with the thickness of 5-20 mm.

Further, the thickness T2 of the fiber slow-release layer is 1-10 mm.

Further, a protective layer is coated outside the bulletproof inserting plate.

Further, the protective layer is oxford waterproof cloth or polyurea coating with the thickness of 0.3-1 mm.

Furthermore, each layer of the bulletproof flashboard is in a multi-curved surface shape following each other, and forms full coverage to the bulletproof flashboard.

Compared with the prior art, the invention has the following advantages:

(1) according to the bulletproof flashboard with the fiber slow-release layer, the fiber slow-release layer is arranged between the ceramic bullet-facing layer and the fiber slow-release layer in a covering manner, so that the characteristics of high fiber orientation degree and strong toughness of carbon fibers are fully exerted, the high-efficiency divergence and alleviation of the breakdown force generated by a bullet after the ceramic bullet-facing layer is broken are formed, the possibility that the energy absorption layer is broken down is reduced, and the bullet-hitting defense performance of the bulletproof flashboard is improved.

(2) The transition layer is clamped between the ceramic bullet-facing layer and the fiber slow-release layer, so that the bonding between the layers is facilitated, the layers are bonded through a colloid bonding process to form the bulletproof flashboard, the process is mature and reliable, and the production efficiency of the bulletproof flashboard is facilitated to be improved.

(3) Aramid cloth is used as a crack stop layer and a transition layer, so that the adhesive has good adhesive property and high toughness, and can effectively prevent the ceramic ballistic layer from splashing after being broken.

(4) Resin glue such as epoxy resin glue, polyurethane resin glue, 704 organic silica gel and the like is adopted for bonding, so that the high-strength bonding performance is achieved, the bonding firmness with each layer of the bulletproof flashboard is high, and the improvement of the overall firmness of the bulletproof flashboard is facilitated.

(5) The boron carbide composite ceramic plate or the silicon carbide composite ceramic plate has extremely high strength and hardness, and the proper thickness is selected according to the requirement of the bulletproof grade, so that the effective reduction of the impact force of bullet impact can be realized.

(6) The high molecular polyethylene plate such as PE is used as an energy absorption layer, has good toughness and tensile property, can absorb and relieve the impact force of bullets in a large amount, and forms effective protection for human bodies.

(7) The fiber slow-release layer is set to be 1-10mm thick, and the adjustment is carried out according to different bulletproof grades, so that good divergence and slow release of the elastic impact force can be formed, the impact receiving range on the fiber slow-release layer and the energy absorption layer is enlarged, and the possibility of breakdown of the energy absorption layer is reduced.

(8) The protective layer is coated outside the bulletproof flashboard, so that good dustproof and waterproof effects can be achieved, and the service performance of the bulletproof flashboard can be kept.

(9) The coating layer of the oxford waterproof cloth or polyurea coating is used as the protective layer, so that the waterproof performance is excellent, the surface strength of the bulletproof flashboard can be increased, and the surface damage of the bulletproof flashboard is reduced.

(10) The bulletproof flashboard adopts a multi-curved surface structure shape, can be attached to the chest of a human body in a shape following manner, and each layer completely covers the whole bulletproof flashboard to form a complete defense surface, so that the bulletproof flashboard is beneficial to forming reliable protection on the human body.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, illustrate embodiments of the invention and together with the description serve to explain the invention, and the description is given by way of example only and without limitation to the terms of relative positions. In the drawings:

fig. 1 is a schematic perspective view of a bulletproof insert plate with a fiber sustained-release layer according to an embodiment of the present invention;

figure 2 is an exploded view of a bulletproof insert according to an embodiment of the invention;

FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 1;

FIG. 4 is an enlarged view of a portion of FIG. 3B;

fig. 5 is a schematic diagram showing the comparison of the bulletproof flashboard according to the embodiment of the invention and a common bulletproof flashboard in a situation of being hit by a bullet;

description of reference numerals:

1. a crack stop layer; 2. a ceramic ballistic layer; 3. a transition layer; 4. a fibrous sustained release layer; 5. an energy absorbing layer; 6. a bulletproof flashboard; 7. a point of rupture.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that, if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "back", etc. appear, they are based on the orientation or positional relationship shown in the drawings and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

The embodiment relates to a bulletproof flashboard with a fiber slow-release layer, which is beneficial to improving the ballistic defense performance of the bulletproof flashboard.

As shown in fig. 1 and fig. 2, the bulletproof insert plate with the fiber slow-release layer comprises a crack stop layer 1, a ceramic ballistic layer 2 and an energy absorption layer 5 which are arranged in sequence along the ballistic direction. Wherein, a fiber slow release layer 4 is arranged between the ceramic bullet receiving layer 2 and the fiber slow release layer 4. The fiber slow release layer 4 is made of a carbon fiber plate.

Based on the above design concept, an exemplary structure of the bulletproof insert with a fiber slow-release layer of the present embodiment is shown in fig. 1 and fig. 2, and the bulletproof insert 6 is formed by sequentially stacking a crack stop layer 1, a ceramic ballistic layer 2, a transition layer 3, a fiber slow-release layer 4, and an energy absorption layer 5 along a direction of ballistic impact, and covering and bonding the layers one by one.

As shown in fig. 3, to form a complete defense surface, each layer of the bulletproof insert plate 6 is in a multi-curved surface shape following each other, and the size and shape of each layer are consistent, so that the bulletproof insert plate 6 is covered completely. The bulletproof flashboard 6 adopts a multi-curved surface structure shape, can realize the conformal attachment with the human body forebreast, and each layer completely covers the whole bulletproof flashboard 6, thus being beneficial to forming the reliable protection for the human body.

As shown in fig. 3 and fig. 4, the transition layer 3 is disposed between the ceramic bullet receiving layer 2 and the fiber slow-release layer 4, and the crack stop layer 1, the ceramic bullet receiving layer 2, the transition layer 3, the fiber slow-release layer 4 and the energy absorption layer 5 are bonded by glue. A transition layer 3 is clamped between the ceramic bullet-facing layer 2 and the fiber slow-release layer 4, so that the bonding between the layers is facilitated, the layers are bonded through a colloid bonding process to form the bulletproof flashboard 6, the process is mature and reliable, and the production efficiency of the bulletproof flashboard 6 is improved. The colloid used for bonding can adopt epoxy resin glue, polyurethane resin glue, 704 organic silica gel and the like, can select one of the epoxy resin glue, the polyurethane resin glue and the 704 organic silica gel, and can also select a mixture of several of the epoxy resin glue, the polyurethane resin glue and the 704 organic silica gel for use. Resin glue such as epoxy resin glue, polyurethane resin glue, 704 organic silica gel is adopted for bonding, the high-strength bonding performance is achieved, the bonding firmness with each layer of the bulletproof flashboard 6 is high, and the improvement of the overall firmness of the bulletproof flashboard 6 is facilitated.

The anti-cracking layer 1 and the transition layer 3 are preferably made of aramid fabric to fully exert good bonding performance of the aramid fabric, and the anti-cracking layer 1 and the transition layer 3 can well wrap the ceramic ballistic layer 2 due to high toughness of the aramid fabric, so that splashing of the broken ceramic ballistic layer 2 can be effectively prevented.

Meanwhile, the exterior of the bulletproof flashboard 6 is coated with a protective layer (not shown in the figure), the protective layer is mainly used for dust prevention, water prevention and scratch prevention, and firm cloth with higher toughness can be adopted. In this embodiment, the protective layer is made of oxford waterproof cloth, or is formed by spraying a polyurea coating with a certain thickness. When spraying the polyurea coating, the thickness is preferably 0.3 to 1mm, and a polyurea coating of 0.5mm thickness is preferably sprayed. The protective layer is coated outside the bulletproof flashboard 6, so that good dustproof and waterproof effects can be achieved, the service performance of the bulletproof flashboard 6 can be kept, the coating layer made of oxford waterproof cloth or polyurea paint is used as the protective layer, the waterproof performance is excellent, the surface strength of the bulletproof flashboard 6 can be improved, and the surface damage of the bulletproof flashboard 6 is reduced.

For the ceramic bullet-facing layer 2, the fiber slow-release layer 4 and the energy absorption layer 5 which play the main bulletproof role, as shown in fig. 4, the ceramic bullet-facing layer 2 is preferably made of a boron carbide composite ceramic plate or a silicon carbide composite ceramic plate, and the thickness T1 of the ceramic bullet-facing layer 2 is 5-12 mm. The boron carbide composite ceramic plate or the silicon carbide composite ceramic plate has extremely high strength and hardness, and the proper thickness is selected according to the requirement of the bulletproof grade, so that the effective reduction of the impact force of bullet impact can be realized.

The energy absorption layer 5 preferably adopts a high-molecular polyethylene plate or aramid fiber, and the high-molecular polyethylene plate or aramid fiber such as PE is used, so that the energy absorption layer has good toughness and tensile property, can absorb and relieve the impact force of bullets in a large amount, and can effectively protect human bodies. The thickness T3 of the energy absorbing layer 5 can be set to 5-20mm for coping with the needs of different ballistic classes.

The thickness T2 of the fiber slow-release layer 4 is preferably set to be 1-10mm, and the thickness T2 should be adjusted according to different bulletproof grades, so that good divergence and slow release of the impact force can be formed, the impact receiving range on the fiber slow-release layer 4 and the energy absorption layer 5 is enlarged, and the possibility of breakdown of the energy absorption layer 5 is reduced.

The thicknesses of the ceramic bullet-facing layer 2, the fiber slow-release layer 4 and the energy absorption layer 5 are set according to different requirements of bullet-proof grades. For example, the bulletproof inserting plate 6 used for police bulletproof clothes mainly meets the bulletproof requirement of small-caliber bullets such as a pistol, and can meet the requirement of preventing the bulletproof inserting plate 6 from being punctured by using the ceramic bullet-facing layer 2 with the thickness of 6mm and matching with the energy absorption layer 5 with the thickness of 10 mm. Along with the increase of the bulletproof grade, the thicknesses of the ceramic bullet receiving layer 2, the fiber slow release layer 4 and the energy absorption layer 5 are correspondingly increased, and when the thickness of the energy absorption layer 5 is increased to 15mm, the thickness of the fiber slow release layer 4 is 1-10mm, and the thickness of the ceramic bullet receiving layer 2 is 7-10mm, the bullet impact defense requirement of a 15 m-distance 53-type armor piercing combustion bullet can be met.

Referring to fig. 5, the energy absorption layer 5 is a carbon fiber plate with a thickness of 10mm, the fiber slow release layer 4 is a carbon fiber plate with a thickness of 4mm, the ceramic ballistic layer 2 is a bulletproof flashboard 6 with a thickness of 9mm, and the ballistic test of the 53-type armor piercing projectile is carried out at a distance of 15m, wherein the experimental data conditions are as follows:

two bulletproof spiles 6 with the same specification are adopted, the weight is respectively 2.969Kg and 2.906Kg, the size is 325mm, the ceramic ballistic layer is 265mm, and three times of ballistic impact is received after the ceramic ballistic layer is heated for three hours at the temperature of 55 ℃. Six sets of data were obtained:

firstly, the bullet speed is 877 m/s-the sunken depth is 29.2 mm;

② the bullet speed is 873 m/s-the sinking depth is 20.8 mm;

thirdly, the bullet speed is 878 m/s-the sunken depth is 30.4 mm;

fourthly, the bullet speed is 878 m/s-the sunken depth is 22.2 mm;

fifthly, the bullet speed is 877 m/s-the sunken depth is 19.8 mm;

sixthly, the bullet speed is 874 m/s-the concave depth is 33.5 mm.

It can be seen that the situation of breakdown does not occur, the sunken depths of the bulletproof flashboards 6 are all below 34mm, and the impact injury which can be formed on the human body at the inner sides of the bulletproof flashboards 6 is within an acceptable range and is obviously superior to the defense performance of the existing bulletproof flashboards 6.

Because the fiber slow-release layer 4 is arranged and the fiber slow-release layer 4 is made of the carbon fiber material with extremely high toughness, after the impact of the warhead is reduced in advance by the ceramic bullet facing layer 2, the strength of the warhead is effectively diffused and relieved by the fiber slow-release layer 4. In the alternative carbon fiber material, there are 1K, 3K, 6K and 12K small tow carbon fibers in the specification divided according to the number of monofilaments in the carbon fiber tow, and the fiber slow release layer 4 of the embodiment preferably uses a 3K series product, such as carbon fiber with the brand number TZ 700S. The layers of carbon fiber can be woven in a plain, twill or plain twill cross-laminated manner.

As shown in fig. 5, (a) is a deformation state of the conventional bulletproof insert plate when being struck by a bullet, and (b) is a deformation state of the bulletproof insert plate 6 described in this embodiment when being struck by a bullet. (b) In the surface area of the bulletproof flashboard 6, the fiber slow-release layer 4 takes a bursting point 7 as a center to disperse the impact force of a bullet to the periphery and relieve the impact force, then the energy absorption layer 5 further absorbs the slow release, the radial dimension D2 of the formed stressed damaged area is large, and the height H2 (namely the depth of the dent of the bulletproof flashboard 6) of the inner side of the bulletproof flashboard 6 is small. In (a), since absorption can be reduced only by the energy absorbing layer 5, the radial dimension D1 of the force-receiving broken region caused by the bursting point 7 is small, and the height H1 of the inner protrusion of the bulletproof insert 6 is large. It is for the above reasons that the ballistic protection performance of the ballistic panel 6 of this embodiment is greatly improved.

The high-performance fiber deforms and breaks in the bullet invasion process, the breaking kinetic energy of the bullet is consumed, and the bulletproof energy can be expressed by the formula:

R²＝W×C

in the formula: r is the bulletproof property; w is the fracture energy absorption rate; c is the speed of sound in the fiber. The C is determined by the modulus and toughness of the fiber, the higher the modulus, the better the toughness, the larger the C, the better the bulletproof performance. The relevant performance parameters for several main ballistic materials are listed in the table below:

in the above table, the sound velocity C is the speed of sound wave propagating along the axial direction of the fiber, and the higher the degree of fiber orientation, the higher the transmission sound velocity. From the above, the carbon fiber and aramid fiber have outstanding sound velocity indexes in various bulletproof materials; particularly, the elongation index of the carbon fiber is very outstanding, and the carbon fiber is introduced into the fiber slow-release layer 4 of the bulletproof flashboard 6, so that unexpected good effects are exerted.

The high-toughness carbon fiber material, particularly the graphene carbon fiber material, is a single-layer two-dimensional honeycomb lattice structure formed by carbon atoms in a layer-by-layer overlapping manner, so that the carbon fiber is like a net with extremely high toughness to form the blocking and force clearing of bullets, thereby playing the roles of increasing the stress surface and reducing the sinking depth of the bulletproof flashboard 6.

According to the bulletproof flashboard with the fiber slow-release layer, the fiber slow-release layer 4 is arranged between the ceramic bullet-facing layer 2 and the fiber slow-release layer 4 in a covering manner, so that the characteristics of high fiber orientation degree and strong toughness of carbon fibers are fully exerted, the breakdown force generated by a bullet after the ceramic bullet-facing layer 2 is broken is effectively diffused and relieved, the possibility that the energy absorption layer 5 is broken down can be reduced, and the bullet-hitting defense performance of the bulletproof flashboard 6 can be improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a shellproof picture peg with fibre slowly-releasing layer, includes that the direction sets gradually along the bullet hits that crack stopping layer (1), pottery meet an elastic layer (2) and energy absorption layer (5), its characterized in that: a fiber slow-release layer (4) is arranged between the ceramic bullet facing layer (2) and the fiber slow-release layer (4), and the fiber slow-release layer (4) is a carbon fiber plate.

2. A ballistic resistant panel with a fibrous delay layer according to claim 1, characterized in that: a transition layer (3) is clamped between the ceramic bullet receiving layer (2) and the fiber slow release layer (4), and the crack stop layer (1), the ceramic bullet receiving layer (2), the transition layer (3), the fiber slow release layer (4) and the energy absorption layer (5) are bonded through colloid.

3. A ballistic resistant panel with a fibrous delay layer according to claim 2, characterized in that: the crack-stopping layer (1) and the transition layer (3) are made of aramid fabric.

4. A ballistic resistant panel with a fibrous delay layer according to claim 2, characterized in that: the colloid comprises one or more of epoxy resin glue, polyurethane resin glue and 704 organic silica gel.

5. A ballistic resistant panel with a fibrous delay layer according to claim 1, characterized in that: the ceramic bullet facing layer (2) is a boron carbide composite ceramic plate or a silicon carbide composite ceramic plate with the thickness of 5-12 mm.

6. A ballistic resistant panel with a fibrous delay layer according to claim 1, characterized in that: the energy absorption layer (5) is a high molecular polyethylene plate with the thickness of 5-20 mm.

7. A ballistic protection panel with a fibrous delay layer according to any one of claims 1 to 6, wherein: the thickness T2 of the fiber slow-release layer (4) is 1-10 mm.

8. Ballistic resistant insert with a fibrous delay layer according to claim 7, characterized in that: the exterior of the bulletproof flashboard (6) is coated with a protective layer.

9. A ballistic resistant panel with a fibrous delay layer according to claim 8, characterized in that: the protective layer is oxford waterproof cloth or polyurea coating with the thickness of 0.3-1 mm.

10. Ballistic resistant insert with a fibrous delay layer according to claim 7, characterized in that: each layer of the bulletproof flashboard (6) is in a multi-curved surface shape following each other, and forms full coverage to the bulletproof flashboard (6).