Kevlar is the trade name of Dupont’s para- aramid fiber. In this article, we will discuss about the Kevlar Fiber Manufacturing Process.
Kevlar Fiber Manufacturing Process
P-phenylene diamine + terepthaloyl chloride
Poly (p-phenylene terephthalamide) + HCL
Liquid crystal polymer (LCP)
Dry-Jet wet spinning2
Drawing at more than 300 ° c at 15-20 draw ratio
FDY or staple fiber of Kevlar
The Aramid fiber was commercialized by DuPont in 1972 as a replacement for steel in racing tires. But in 1965 Kevlar invented by Stephanie Kwolek at DuPont. She was experimenting with polymers in combination with fiber and fabrics. The creation of Kevlar came about completely by accident in 1965 while analyzing molecule chains at very low temperatures.
Stephanie Kwolek found a specific formation of molecule chains that were exceptionally strong and stiff. The solution was strange. It was cloudy and thin. Unlikely nylon polymers, which are clear and thick.
The fibers created kevlar from the solution was the strongest, the world had ever seen. A whole new war industry came about after her creation of Kevlar. It is the crucial material behind every bulletproof vest, which has saved countless human lives. Kevlar has so many applications from bicycle tires to the aerospace industry.
Application of Kevlar fiber:
- Sports Industry.
- Aerospace Industry
- Protection Suit
- Fashion Industry
Polymer called p-phenylene terephthalate is the main ingredient of Kevlar. Kevlar fiber is used to make a variety of clothing, accessories, and equipment safe and cut resistant. It’s lightweight and extraordinarily strong, with five times the strength of steel on an equal-weight basis. Best known for its use in ballistic and stab-resistant body armor, Kevlar® brand Aramid fiber has shown its own heroism in helping to save the lives of thousands of people around the world.