What are the characteristics of PE and aramid bulletproof equipment?
At present, PE and aramid materials are the most widely used materials in many bulletproof equipment. They have occupied a dominant position in the bulletproof equipment market due to their excellent characteristics and superior bulletproof capabilities, and these equipment are deeply loved by customers.
However, due to the different characteristics of the two materials, there are certain differences in the performance of the two bulletproof products. And many people may not know the difference in performance between the equipment using these two materials. In order to promote their further understanding and facilitate everyone to make reasonable choices according to their own conditions when purchasing, I will compare PE bulletproof equipment and aromatic materials. Let me briefly introduce the advantages and disadvantages of Lun bulletproof equipment.
1. Aramid fiber equipment
Aramid fiber, also known as Kevlar (chemical name is phenylenediamide phthalamide), was born in the late 1960s. It is a new type of high-tech synthetic fiber. It has high temperature resistance, acid and alkali resistance, light weight and high strength. And other advantages, has been widely used in bulletproof protective equipment, construction and electronic equipment and other fields.
But aramid also has two fatal shortcomings:
1) It will degrade when exposed to ultraviolet rays;
2) Easy to hydrolyze, even if it is stored in a dry environment, it will absorb moisture in the air and gradually hydrolyze.
Therefore, aramid bulletproof boards and bulletproof vests are not suitable for long-term use in strong ultraviolet and humid environments, which will greatly reduce their protective performance and service life. In addition, the poor stability and short life of aramid also limit the further application of aramid in the field of bulletproof.
The price of high-quality aramid fiber is also higher than that of PE, which may be 30% to 50% higher. At present, the bulletproof products using aramid fiber have gradually decreased and have been replaced by PE bulletproof products. Unless it is in a special environment or has special requirements, such as the Middle East with high temperature all year round, it is recommended to use PE bulletproof equipment.
2. PE fiber equipment
The PE mentioned before actually refers to UHMW-PE, which is ultra-high molecular weight polyethylene. It is a high-performance organic fiber developed in the early 1980s. It is also known as the world's three major high-tech fibers together with carbon fiber and aramid fiber. . The plastic bags we use in our daily life are actually polyethylene products, which have ultra-high stability and are extremely difficult to degrade, thus causing serious environmental pollution. But it is precisely this characteristic that makes it an ideal material for body armor. In addition, it has the characteristics of low temperature resistance, UV resistance, and water resistance.
In terms of defense against low-velocity bullets, the bulletproof performance of UHMW-PE fiber is about 30% higher than that of aramid fiber;
In terms of defense against high-speed bullets, the bulletproof ability of UHMW-PE fiber is 1.5 to 2 times that of aramid fiber, so PE is currently recognized as the best bulletproof material.
However, UHMW-PE also has some disadvantages: its high temperature resistance is poor and far inferior to that of aramid. The use temperature of UHMWPE bulletproof products must be controlled within 80°C (to meet the temperature requirements of the human body and equipment - temperature resistance of 55°C). Once this temperature exceeds this temperature, its performance will decline rapidly. When the temperature reaches above 150°C, it will melt. However, aramid bulletproof products can still maintain a stable structure and good protective performance in a high temperature environment of 200 °C. Therefore, PE bulletproof products are not suitable for use in high temperature environments.
In addition, the creep resistance of PE is not as good as that of aramid, and the equipment using PE will deform slowly when it is under continuous pressure. Therefore, equipment with complex shapes such as helmets that need to withstand long-term pressure cannot be made of PE.
In addition to these features, as mentioned earlier, the price of PE is much lower than that of aramid.
In general, PE bulletproof equipment and aramid bulletproof equipment each have their own advantages and disadvantages. It is recommended that consumers make reasonable choices according to their own needs when choosing bulletproof products.
The above is all the introduction content of PE bulletproof equipment and aramid bulletproof equipment, I hope it will be helpful to everyone. If you have any questions, please feel free to consult us.
