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DuPont™ Kevlar® 29 Polyaramid Fiber (Polyparaphenylene terephthalamide)

Grade: DuPont™ Kevlar® 29
Formula: Polyparaphenylene terephthalamide
Form: Fiber
Material: Polyaramide
Commodity: Polymers
DuPont™ Kevlar® 29 is a polyaramid fiber offered in Goodfellow's range of fibers. This fiber exhibits high tensile strength and modulus while maintaining flexibility. Kevlar® 29 also has excellent thermal, impact, and cut resistance. This fiber finds use in a wide variety of applications including bulletproof vests, helmets, ropes and cables, brake pads, and composites. With its exceptional combination of strength, heat resistance, and chemical stability, Kevlar® 29 stands out as a high-performance fiber.
Technical Data Sheet Safety Data Sheet Tolerance Properties
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Tolerances

Fiber
Filament Diameter ±25%
Number Of Yarns ±10%
Number Of Filaments ±10%
Tex Number ±10%
Length +5% / -1%

Material Properties for Polymers

Chemical Resistance
Element Value
Acids - concentrated Poor
Acids - dilute Fair
Alcohols Good
Alkalis Good-Poor
Aromatic hydrocarbons Good
Greases and Oils Good
Halogenated Hydrocarbons Good
Halogens Good
Ketones Good
Physical Properties
Element Value
Resistance to Ultra-violet Fair
Water absorption( % ) 3.5
Water absorption - equilibrium( % ) 3.5
Density( gcm⁻³ ) 1.44
Thermal Properties
Element Value
Lower working temperature( C ) -200
Upper working temperature( C ) 180-245
Specific heat( J K⁻¹ kg⁻¹ ) 1400
Thermal conductivity( W m⁻¹ K⁻¹ ) 0.04@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) -2Along Axis
Mechanical Properties
Element Value
Tensile modulus( GPa ) 59-124
Tensile strength( MPa ) 2760

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