With the progress of society, the development and use of various new materials have become more and more abundant. Over the past few decades, the emergence of high-performance fiber materials has promoted the replacement of bulletproof equipment. There are currently two main types of high-performance fiber materials on the market: PE and Kevlar. Since they are both high-performance fiber materials, what is the difference between them? Anhua Police Equipment will explain it to you below:

PE actually refers to ultra-high molecular weight polyethylene. Polyethylene products are everywhere in our daily lives, such as plastic bags, beverage bottles, etc., so polyethylene is not unfamiliar to us. Polyethylene has super high stability and is extremely difficult to degrade. In addition, it is also resistant to low temperatures, UV light, water resistance, and light weight, making it an ideal material for making bulletproof equipment. However, PE has poor high temperature resistance, and the use temperature 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 is exceeded, its performance will drop rapidly, and it will melt when the temperature reaches above 150°C. Therefore, although PE bulletproof products can meet most usage scenarios, they are not suitable for use in high temperature environments such as the Middle East.

Aramid, also known as Kevlar, has the advantages of high temperature resistance, acid and alkali resistance, light weight, and high strength. It has been widely used in bulletproof equipment, construction, and electronic equipment. Compared with PE, aramid has better high temperature resistance and creep resistance. Similarly, aramid also has some disadvantages, such as degradation when exposed to ultraviolet rays, easy hydrolysis, and even if stored in a dry environment, it will absorb moisture in the air and gradually hydrolyze. Therefore, aramid equipment is not suitable for long-term use in environments with strong ultraviolet rays and relatively humid environments.

Recently, customers often ask me about the difference between PE and Kevlar materials for bulletproof equipment. I hope this article can help them!