Aramid fiber are one of the high thermal high performance(HT-HP) modern fibers that are potentially of interest in civil, defence, automobile industries, and Technical textile fields. Being characterized by high strength, high stiffness, low creep and resistance to corrosion un-like carbon or glass fiber. However the aramid fiber are frequently used with out resin impregnation to resistance of fire. Eg.- Kevlar, Nomex, Twaron, and Technora are commercial name of aramid fiber.

1. Presented By:- Amal Ray
Roll No:-02
Stream:-MTT
GUIDED BY-Sajal Burman
GETTS, Serampore

2.  Aramid fiber are one of the high thermal high
performance(HT-HP) modern fibers that are
potentially of interest in civil, defence,
automobile industries, and Technical textile
fields. Being characterized by high strength,
high stiffness, low creep and resistance to
corrosion un-like carbon or glass fiber. However
the aramid fiber are frequently used with out
resin impregnation to resistance of fire.
 Eg.- Kevlar, Nomex, Twaron, and Technora are
commercial name of aramid fiber.

3. Fig-1. Aramid fiber
Fig-2.Para aramid (kevlar) and
Meta aramid (Nomex) fiber
structure

4.  Aramids are generally prepared by the
reaction between an amine group and a
carboxylic acid halide group.
 nNH2-Ar-COCl → -(NH-Ar-CO)n- + nHCl

5.  Aromatic polyamides were first introduced in
commercial applications in the early 1960s,
with a meta-aramid fiber produced by DuPont
company of USA under the trade name
Nomex. After that Kevlar(para-aramid) has
produced. Meta-aramid has also produced in
the Netherlands and Japan by Teijin under the
trade name Teijin-conex, New Star and a
variant of meta-aramid in France by Kermel
under the trade name Kermel.

6. 0
10
20
30
40
1980 1988 1993 1998
United States
Western Europ
Japan
Consumption of aramids in the three major regions: United States,
Western Europe, and Japan

7. MATERIAL Strength to
weight
KN.m/kg.
Young's
Modulus
GPa
Density g/cm3
Aramid fiber
(Kevlar ) 2514 70.5–112.4 1.44
Carbon Fibre 2457 181 1.75
Glass Fibre 1307 40–45 2.57
Steel alloy ASTM
A36
254 200 7.8

9. Kevlar Nomex
1.High Tensile Strength at Low
Weight.
2.Low Elongation to Break
High Modulus (Structural Rigidity).
3Low Electrical Conductivity.
4.High Chemical Resistance.
5.Low Thermal Shrinkage.
6.High Toughness (Work-To-
Break).
7.Excellent Dimensional Stability.
8.High Cut Resistance.
9.Flame Resistant, Self-
Extinguishing.
1 High Heat and Flame Resistant.
2.High Ultraviolet Resistance.
3.High Chemical Resistance.
4.Low Thermal Shrinkage.
5.Formable for Molded Parts.
6.Low Elongation to Break.
7.Low Electrical Conductivity.

10. Aramid fiber uses in:-
 a)Geotextile:-Reinforced thermoplastic pipes.
 b) Automobile Industries:-set belt, helmets,
Tire cord.
 c) Defence fields:-bullet-proof jacket, Military
cloth.
 d) Protective Textile-Body armour, safety
boot.

11.  e) Fire resistance:-Flame-resistant
clothing.
 f) Sports:-beg, Tennis strings, Hockey sticks,
various Sporting goods.
 g) Space Organization:-Optical fiber cable
systems.
 h) Thermal & Electrical insulation:-Heat
protective clothing and electrical insulator.
 i) Air filtration:-Hot air filtration fabrics.
 j) Ropes, cables, belts and tape etc.

12.  Although composites of other fibres have now
supplanted aramid composites as having the highest
specific strengths, aramids still offer combinations of
properties not available with any other fibre.
 i.e., aramids offer high specific strength,
tough-ness and creep resistance, combined with
moderate cost. However, the applications of aramid
composites continue to be limited by their poor
compressive and off-axis properties and in some
applications, their tendency to absorb water.
Nonetheless, aramids will continue to be the fibre of
choice where properties such as outstanding impact
resistance combined with creep resistance are critical.

13. 1. Wikipedia, the free encyclopaedia/aramid.htm
2. http://www.dupont.com/afs/kfeatures.htm> (15 Nov.
2000) Du Pont Website: “Kevlar” .
3. Polyamides (General)” Encyclopedia of Chemical Technology.
1996 ed. Vol. 19. p.506-508, 519-523.
4. GE website :www.complas.com/kevlar.asp
5. A. Kent, ed. (2006). Handbook of Industrial Chemistry and
Biotechnology. Springer. p. 483. ISBN 0-387-27842-7.
6. Aramid fiber for civil Engineering application.by-CJ
Burgoyne. PhD. Engineering Dept. of Cambridge University.