Aramid fiber

Aramid Fiber
Textile Fiber
Textile Engineering
This slide is about Aramid Fiber

1. To my presentation Md Faisal Ahmed Biplob ID:191003045

2. Presentation Topic Aramid Fiber

3. Introduction Aramid are heat-resistant and strong synthetic fibers. They are used in aerospace and military applications, for ballistic rated body armor, bicycle tires, and an asbestos substitute. The following characteristic distinguish them from other polymers: High strength Good resistance to abrasion Good resistance to organic solvents Non-conductive No melting point Low flammability

4. History Meta aramid was first produced by DuPont in 1961 under the trade name of Nomex. This has similarity with textile fiber having excellent heat resistance. It was used extensively in the production of protecting clothes , air filtration ,insulation ,substitute as asbestos. Meta aramid was also produced in Netherland, Japan,Korea , China and France. Stephene Kwolek working at DuPont introduced first para-aramid called Kevlar in 1973.

5. Types of Aramid polymer:

6. Structure Fig-1. Aramid fiber

7. General features of Kevlar: High Tensile Strength at Low Weight. Low Elongation to Break. High Modulus (Structural Rigidity). Low Electrical Conductivity. High Chemical Resistance. Low Thermal Shrinkage. High Toughness (Work-To-Break). Excellent Dimensional Stability. High Cut Resistance. Flame Resistant, Self-Extinguishing.

8. Characteristics & Properties It has remarkable strength. It is stronger than fiber glass and five times stronger than steel . All the Kevlar fibers show high tensile strength and modulus. Kevlar 49 and Kevlar 149 even much higher modulus. Benzene aromatic ring is the key structure of Kevlar’s.

9. Different Applications Aramid fiber uses in:- a)Geotextile:-Reinforced thermoplastic pipes. b) Automobile Industries:-set belt, helmets, Tire cord. c) Defense fields:-bullet-proof jacket, Military cloth. d) Protective Textile-Body armor, safety boot.