What is the difference between bulletproof aramid fabric and Kevlar fiber

There are significant differences between bulletproof aramid fabric and Kevlar fiber in multiple aspects.
Firstly, from the perspective of material properties, aramid fiber is a high-performance and high-strength synthetic fiber with excellent mechanical and chemical properties. It has high tensile strength and modulus, and can withstand complex environments such as high temperature and high humidity, making it widely used in fields such as bulletproof, anti cutting, and protection. Kevlar fiber, commonly known as bulletproof fiber, was originally named "polyphenylenediamine" and was invented and commercialized by DuPont in the United States. This fiber material has low density, high strength, good toughness, high temperature resistance, and is easy to process and shape. Its strength is 5 times that of steel of the same quality, but its density is only one-fifth that of steel.
Secondly, from the perspective of application scenarios, aramid fibers are not only used in protective equipment such as bulletproof vests and knife jackets, but also widely used in fields such as wire insulation materials and building insulation materials. Kevlar fiber is not only used for bulletproof vests, but also widely used in fields such as ship materials, aerospace materials, and high-speed train tires.
Finally, in terms of strength, although both aramid fibers and Kevlar have high strength and protective properties, the strength of aramid is slightly higher.
In summary, there are significant differences between bulletproof aramid fabric and Kevlar fiber in terms of material properties, application scenarios, and strength. The choice of material to use depends on the specific application scenario and requirements.