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kevlar
Kevlar® Fiber
 Kevlar® is a material formed by combining para-
phenylenediamine and terephthaloyl chloride. Aromatic
polyamide (aramid) threads are the result.
Kevlar was invented by Stephanie Kwolek while working
for DuPont in 1965 but commercial use began in 1971 .
Chemical Reaction
 The reaction of 1,4-phenylene-diamine (para-
phenylenediamine) with terephthaloyl chloride yielding
Kevlar.
Advantages
 High tensile strength at low weight
 Flame resistant, self extinguishing
 Low electrical conductivity
 High chemical resistance
 Excellent dimensional stability
 Low thermal shrinkage
 Low elongation to break
 High toughness (work-to-break)
 High cut resistance
 High modulus (structural rigidity)
Disadvantages
1. Despite its strength and resilience, Kevlar also has some
disadvantages which limits its efficiency.
2. Kevlar fibers quickly absorb moisture, meaning it is more
sensitive to its environment than other materials.
3. Although Kevlar is strong its ability to cope with
compression is fairly poor. It can be difficult to cut.
Specially made scissors are usually required to cut the
fabric
Applications in Military
 Vehicle Armor
 Vehicle frame and body protection .
 protects aircraft and helicopter crews.
 Military Helmets
 Absorb 20% more kinetic energy for Ground Troops
 Improve mobility and fatigue of the solders because of
low weight.
 Body Armor
 Improved Outer Tactical Vest, ballistic, throat and groin
protectors, anti-mine boots and chaps.
Applications in Military
Vehicle Armor:
Applications in Military
Military Helmets
Applications in Military
Applications in Military
Body Armor
Applications in Military
Tactical Vest
Applications in Military
Applications in Military
K9 units protection
Personal security
How it works
HOW IT WORKS?
When a bullet strikes body armor, it is caught in a
“web” of very strong fibers. These fibers absorb and
disperse the impact energy that is transmitted to
the bullet proof vest from the bullet, causing the
bullet to deform or “mushroom.”
CONTINUE
 Effect of Bullet Hit
Everyday Kevlar
Cell phone back covers:
Everyday Kevlar
 Pants and apparel
Everyday Kevlar
 Motorcycle helmets
and gloves
Everyday Kevlar
 Riding protection
Everyday Kevlar
Personal Electronics
Everyday Kevlar
Reinforcement material for some car and
bicycle tyres and climbing ropes.
Sports
Sporting goods:
Everyday Kevlar
Fire Resistant Mattresses and vests:
Any
Questions ???
kevlar

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kevlar