Du Pont Kevlar Aramid Und Us Trial Fiber Abridged)
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Transcript of Du Pont Kevlar Aramid Und Us Trial Fiber Abridged)
Technical Guide for Kevlar Aramid Fiber
By Eun-Beum Lee
ENGL 314
ContentContent
Introduction General Information of Kevlar Aramid Fiber General Features of Kevlar Aramid Fiber Commercial Products of Kevlar Aramid fiber Product Applications Conclusion
IntroductionIntroduction Kevlar aramid fiber is the commercial name for poly(p-
phenylene terephtalamide) Kevlar is registered trade mark of Du Pont Co. Kevlar is an organic fiber in the aromatic polyamide
(aramid) family. Kevlar has high strength, stiffness, toughness, and thermal
stability Kevlar is used in a wide range of areas because of unique
properties
General Information of Kevlar General Information of Kevlar Aramid fiberAramid fiber
Development: By S. L. Kwolek, a Du Pont research scientist, synthesized a series of para-oriented aromatic polyamides (1965)
Chemical Structure
General Information of Kevlar General Information of Kevlar Aramid fiber(Cont’d)Aramid fiber(Cont’d)
Reason for being a strong material - Hydrogen bonding, Radial orientation.
Hydrogen Bonding and Radial Orientation
General Features of Kevlar General Features of Kevlar Aramid FiberAramid Fiber
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
Commercial Products of Kevlar Aramid FiberCommercial Products of Kevlar Aramid Fiber
Filament form-KEVLAR 29,49,68,100, 119, 129, 149. Kevlar 29 -Representative, Rubber Reinforcing, Personal protection vests,
Reinforcement for hard armor, helmets, Spall Panels, electronic housing protection
Kevlar 49 - High modulus type, Composite, marine sporting goods, and aerospace applications
Kevlar 68 - Medium type between 29 and 49 Kevlar 100 - Colored Kevlar, Gloves, Protective Apparel Kevlar 119 - High durable, Tire, V-belt, Hose, C-belt Kevlar 129 - High tenacity type, Ballistic vest, Rope, Tire Kevlar 149 - Ultra high modulus type, Composite, Rope
Commercial Products of Kevlar Aramid Fiber Commercial Products of Kevlar Aramid Fiber (Cont’d)(Cont’d)
Staple Form - Spun yarn –Felt, Nonwoven-Magnetic Card Pulp Form - Fibrillized, Brake, Clutch. Gasket: Containing water by
35, 50% Chopped fiber -6-13mm, Clutch facing
Products FormsProducts Forms
Product ApplicationsProduct Applications
Fiber-reinforced Composites Fibrous Armor Systems Fiber-reinforced Rubber goods Ropes and Cables with Kevlar Fiber Kevlar Aramid Pulp
Fiber-reinforced CompositesFiber-reinforced Composites
Using high tensile Strength and Modulus, light weight, thermal and dimensional stability, and other unique properties of Kevlar Fiber
Using of Product: Kevlar 49 and 149 Advantages: light weight, high tensile
strength and modulus, outstanding toughness and high impact resistance
Applications: aerospace, automotive parts, protruded articles, ships, and boats, friction products, sporting goods, and aramid/aluminum laminates
Fibrous Armor SystemsFibrous Armor Systems(Ballistic Applications)(Ballistic Applications)
Purpose: protection of human lives and vital equipment against ballistic Threats
Using of Product: Kevlar 29, 49, and 129
Fabrics of Kevlar 29: Composite Armor Applications
Fabrics of Kevlar 129: Civilian Body Armor
Applications: soft and composite armor, Helmets, and Spall Liners with Kevlar Fiber in Combat Vehicles etc.
Fiber–reinforced Rubber GoodsFiber–reinforced Rubber Goods
Applications of rubber goods The Purpose of reinforcement: to improve strength,
stiffness, mechanical functions, and durability Suitable reasons for reinforcing the tires, hoses, belts, and
miscellaneous goods: excellent tensile properties, and light weight
Using of Product: Kevlar 119 Uses: Storage bins, Waterproof Covers, Frictional Surface,
Inflatable devices such as balloons, aircraft evacuation slides, and rafts
Ropes and Cables of Kevlar Aramid FiberRopes and Cables of Kevlar Aramid Fiber
Ropes and Cables with Kevlar Fiber: High Strength, and Light Weight
Extensive development and applications in Ropes and Cables
Using of Product: Kevlar 29 and 49 yarns
Applications:Antennae Guide Wires, Fish line, Industrial and Marine utility ropes, Lifting Slings, Emergency Tow Lines, Netting and Webbing
Kevlar Aramid PulpKevlar Aramid Pulp
Kevlar aramid pulp for industrial paper and elastomeric reinforcement
Asbestos Replacements: Friction Products, Gaskets, Industrial paper, and Thixotrope for adhesives, sealants, and coatings
ConclusionConclusion
Kevlar Aramid Fiber has high strength and high modulus, stiffness, and thermal stability
This unique properties make it an outstanding fiber or use in broad product applications
Technological development of Kevlar Fiber will probably dictate further increases in fiber mechanical and thermal properties