Kevlar® Para-Aramid

Kevlar® Para-Aramid

Lightweight, Durable and Strong

Kevlar® was first developed by chemist Stephanie Kwolekat at DuPont™ in the 1930's. It was first commercially used in the 1970’s as a replacement for steel in racing tires.

Kevlar® Para-Aramid is an aromatic polyamide that is characterized by long rigid crystalline polymer chains.“Para” refers to the specific linkage position of the aromatic rings. Longitudinal alignment of the hydrogen bonds enables high tensile strength and modulus.


Common Types & Deniers
T-29:Standard Modulus
T-49:High Modulus
AP:15% higher tenacity than T-29
KM2:Optimized ballistic resistance
Deniers:200, 380, 400, 750, 800, 1000, 1420, 2160, 2250, 2840, 3000, 7100

Looking to order Kevlar in small quantities? Learn more about our Kevlar Distribution Program.

Kevlar® is a trademark of Dupont Safety & Construction, Inc.

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  • High strength to weight ratio
  • Low elongation to break
  • Good heat & flame resistance
  • Good chemical resistance
  • High cut resistance
  • Excellent ballistic properties


Product bulletin: Kevlar® Distribution Program

Order Kevlar in small quantities - learn more here

Fiber Selection Guide

Compare fiber properties and technical data 

Fiber Conversion Calculator

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Kevlar® Para-Aramid Data
Property Standard Modulus High Modulus
Breaking Tenacity (g/d) 23.0 23.6
Specific Gravity (ratio) 1.44 1.44
Elongation at Break (%) 3.5 2.5
Tensile Modulus (g/d) 555 885
Equilibrium Moisture Regain at 55% RH (%) 5.0 5.0
Creep at 40-48% ult tensile strength (%) <0.03 <0.03
Shrinkage dry air 177 ̊ 30 mins (%) <0.02 <0.02
Melt Point ( ̊C) None None
Decomposition Temp ( ̊C) 425-480 425-480
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