DuPont™ Kevlar® 49 Aramid Fiber

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DuPont™ Kevlar® 49 Aramid Fiber
Categories:	Other Engineering Material; Composite Fibers; Polymer; Thermoset; Aramid
Material Notes:	1140 Denier; 768 Filaments. Kevlar® 49 is a high-modulus type used primarily in fiber optic cable, textile processing, plastic reinforcement, ropes, cables, and composites for marine sporting goods and aerospace applications. General KEVLAR Information: DuPont Kevlar® poly-para-phenylene terephthalamide (aramid) has a unique combination of high strength, high modulus, toughness, and thermal stability. It was developed for demanding industrial and advanced-technology applications. It is chemically stable under a wide variety of exposure conditions; however, certain strong aqueous acids, bases, and sodium hypochlorite can cause degradation, particularly over long periods of time and at elevated temperatures. Information provided by DuPont.
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Physical Properties	Metric	English	Comments

Density	1.44 g/cc	0.0520 lb/in³
Moisture Absorption at Equilibrium	3.5 %	3.5 %	yarn as shipped
	3.5 %	3.5 %	Bone drying the fiber then condition at 75°F (24°C), 55% RH.

Mechanical Properties	Metric	English	Comments
Tensile Strength, Ultimate	3000 MPa	435000 psi	Breaking Tenacity
	3620 MPa	525000 psi	Epoxy-impregnated strands, ASTM D2343
Elongation at Break	2.4 %	2.4 %
Tensile Modulus	112 GPa	16300 ksi
Tenacity	2.08 N/tex	23.6 g/denier
Poissons Ratio	0.36	0.36

Thermal Properties	Metric	English	Comments
Specific Heat Capacity	1.42 J/g-°C @Temperature 25.0 °C	0.339 BTU/lb-°F @Temperature 77.0 °F
Thermal Conductivity	0.0400 W/m-K	0.278 BTU-in/hr-ft²-°F
Maximum Service Temperature, Air	149 - 177 °C	300 - 351 °F	For long-term use
Shrinkage	<= 0.10 %	<= 0.10 %	In water at 212°F (100°C) and in air at 351°F (177°C)

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PDUKEV29 / 33416

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