What is a Bulletproof Plate?
Now the penetration rate of body armor in the military is very high, and we can often see him in various blockbuster films. So I believe that many friends are not very unfamiliar with bulletproof vests, but it may be the first time everyone has heard of Bulletproof Plate. Next, let me tell you what Ballistic Plates are, but before that, we need to introduce why we need Armor Bulletproof Plate.
Most body armors are made of multi-layer aramid or polyethylene PE. Although this kind of body armor is relatively light to wear, due to material and technical limitations, according to the US standard NIJ is at most IIIA level. In other words, it can only withstand 9mm and .44 caliber pistol bullets. Facing the rifle, the body armor was helpless. In order to be able to guard against higher-level threats, we need to use bulletproof plate.
Bulletproof plate. Generally used with body armor or tactical vest. There are two types of bulletproof plate: front and side panels. The front panel can protect the chest and back of the human body, while the side panels provide protection for the side of the human body. The types of materials for making bulletproof plate can be roughly divided into three types:
Ceramic bulletproof plate are now widely used and dominate the mainstream. Let's introduce the principle of ceramic panels and the differences between them.
Ceramic bulletproof plates are generally made of materials such as ceramics and polyethylene PE. Its principle is: when a bullet impacts the bulletproof plate, the bullet first hits the top ceramic layer, and the ceramic hits the bullet with huge kinetic energy. It shatters and transfers the huge impact energy of the impact point to the surroundings to absorb the huge kinetic energy of the bullet. When the bullet passes through the ceramic layer, it has lost most of the kinetic energy. When the bullet reaches the polyethylene layer, the polyethylene consumes the kinetic energy of the bullet through stretching and wraps the bullet and shrapnel. This process has little effect on the human body and has a very good effect. The protective effect.
Among them, the ceramics in the ceramic bulletproof plates generally use the following three different materials:
1. Alumina ceramics
Alumina ceramics has the highest density among the three materials, and bullet-proof plates made of alumina ceramics are heavier in the same area. But the price of alumina ceramics is very low. Therefore, some customers who need to purchase on a large scale will choose this bulletproof board.
2. Silicon carbide ceramics
The density of silicon carbide ceramics is much lower than that of alumina, and it will not even appear heavy compared to polyethylene PE. Its price is relatively expensive, 4 to 5 times that of alumina ceramics, but the lighter weight can bring a better wearing experience and reduce physical consumption. If it is a customer with sufficient funds after all, it is still recommended to choose this plug-in board
3. Boron carbide ceramics
The price of boron carbide is very expensive, which can reach 8 to 10 times that of silicon carbide. Because of its high value, generally we only use this material on NIJ IV bulletproof plates. But relative to such a high price, its density is smaller than silicon carbide. Occasionally, some local tyrant customers choose to buy this kind of plug-in board.
Both alumina and silicon carbide bulletproof inserts plates can be found on the official website of China Hengtai Group Co.,Limited.
There are many types of surface layer processes for bulletproof inserts plates, which are generally divided into two categories: polyurea coating and waterproof cloth outer layer.
The outer layer of the waterproof cloth is a layer of waterproof fabric, which is wrapped on the surface of the bulletproof panes. It has the characteristics of simple processing and low price.
The polyurea coating is uniformly sprayed polyurea on the surface of the bulletproof panels. The polyurea coating will bring extra weight, which is about 200g heavier than the outer layer of the waterproof cloth. But it can also have a certain defensive effect, and the bullet holes after the bullets are shot are also smaller than the bullet holes of the bulletproof inserts plates with the covering as the surface layer. However, the price of inserts coated with polyurea will be more expensive than inserts with the outer layer of waterproof cloth. The specific choice can only depend on personal needs.