Kevlar fiber is a para-aramid fiber known for its high strength-to-weight ratio and cut resistance. Developments include new Kevlar fibers that are 15% stronger and reduce backface deformations. Kevlar is used in aerospace, marine, body armor, helmets, vehicles, oil/gas, and optics due to its light weight and high strength properties. New applications include liquid body armor using Kevlar sheets enclosing shear stress fluid and heat resistant gloves.

1. Developments in
Kevlar® fibre
By
Himanshu Gupta

2. what it is about?
• About Kevlar® fiber?
• Devlopments
• Introduction of new fibers
• Application area

3. What is Kevlar® fiber
• Kevlar® a Para amide fibre is trade name from
first commercialised in 1972.
• High Tensile Strength at Low Weight
• Low Elongation to Break
• High Modulus (Structural Rigidity)
• High Chemical Resistance
• Excellent Dimensional Stability
• High Cut Resistance
• Flame Resistant, Self-Extinguishing

5. Introduction to new fibers
New series of fibres
(Advanced Performance )
o 15% more stronger.
o Reduce backface deformations by
approximately 15%.

6. o Highly fibrillated, short (0.5–1mm) fibers
o Yellow colour
o Useful temperature range (-200 to +350°)

7. Honeycomb core technology
• Composites made with Kevlar®
• Mainly used for aerospace and marine
application
• Provides lightweight strength,
stiffness, toughness, corrosion resistance

8. In Aerospace
• Kevlar® helped Airbus‘ which is concept of
the world's largest aircraft to become a
reality," said Jim Weigand
• Mainly used for weight reduction & increase
fuel efficiency.
• It is found flooring to interior walls to wing
flap to engines

9. In Marine
• Light weight providing strength, stiffness and toughness
• Versatile options for hulls, superstructures
• and furniture bulkheads
• Ideal for economies of fuel and/or increased
payloads
High impact and fatigue resistance

10. Liquid body armour
• Use of shear stress fluid
Behaves like liquid in normal condition
but solidifies in millisecond when strikes.
 Silicon particles suspended in
polyethylene glycol.
Enclosed between different Kevlar®
sheets

11. Light weight Helmet
• Made with Kevlar® XP™
• Reduction in 15% back-face deformation
• Higher protection per weight than existing
aramid-phenolic solutions: shell weight
reduced by 20-25%

12. ADVANCED VEHICLE ARMOR

13. Advanced materials for the oil & gas
industry
• DuPont technology has set new standards in
extraction, pipeline performance, extreme weather
operations, and workforce protection.
• Thermoplastic umbilicals
• FLEXIBLE LINES
• INNOVATIVE SAFETY
• REINFORCED THERMOPLASTIC PIPES

14. Automotive industry
• Tyres
Superb puncture, abrasion and tear resistance
• Belts
• The high modulus and abrasion resistance of Kevlar® yarn help belts
retain their original shape and tension over the millions of revolutions
they go through over the lifespan of a vehicle
• Brake pads
The enhanced thermal stability and inherent abrasion resistance of
brake pads reinforced with Kevlar® pulp helps allow them to last long
and stop the vehicle safely and quietly.
• Gaskets
• Chemical stability and thermal stability help make gaskets reinforced
with Kevlar® pulp strong and durable

15. Optical cables
• Improved coverage of the optic fibre
• Provide crush resistance and
cushion protection for the optic fibre.
• Tight buffered fibre separated from
the cable jacket to prevent sticking
• Load-bearing capacity

16. Heat Resistant Gloves
• Made from Kevlar ® AP
• Cut resistance
• Light weight
• High strength