kevlar
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Developments in Kevlar® fibre
ByHimanshu Gupta
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what it is about?
• About Kevlar® fiber?• Devlopments• Introduction of new fibers• Application area
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What is Kevlar® fiber
• Kevlar® a Para amide fibre is trade name from DU
PONT, 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
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Introduction to new fibers
New series of fibres Kevlar ® AP (Advanced Performance )o 15% more stronger.Kevlar® XPo Reduce backface deformations by approximately 15%.
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KEVLAR® ENGINEERED ELASTOMEo Highly fibrillated, short (0.5–1mm) fiberso Yellow colouro Useful temperature range (-200 to +350°)
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Honeycomb core technology
• Composites made with Kevlar®• Mainly used for aerospace and marine
application• Provides lightweight strength, stiffness, toughness, corrosion resistance
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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
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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
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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
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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%
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ADVANCED VEHICLE ARMOR
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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
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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
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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
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Heat Resistant Gloves
• Made from Kevlar ® AP• Cut resistance • Light weight• High strength
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