Five times the strength of steel

KEVLAR is a Du Pont registered trademark for its unique family of aramid fibers that are manufactured into tapes by Mutual. KEVLAR 49, a higher modulus fiber, is woven into bi-directional fabric tapes for plastic reinforcement of parts. Specific applications of Mutual’s Kevlar bi-directional fabric tapes include:

• Plastic reinforcement (epoxy, polyester, vinyl)
• Lightweight marine laminates for kayaks, canoes, and high performance water craft
• Asbestos replacement products
• Aircraft and aerospace parts
• Snow skis

KEVLAR bi-directional fabric tapes by Mutual have the highest specific tensile strengths of any continuous fiber fabric commercially available. They are two and a half times as strong as “E”-glass, five times as strong as steel, and over ten times as strong as aluminum. Specific tensile modulus of KEVLAR 49 is three times that of “E”-glass and 75% of high strength graphite.

KEVLAR fabric tapes by Mutual display excellent stability over a wide range of temperatures for prolonged periods. The fabrics will not melt or support combustion but will start to carbonize at about 800 degrees F (427 degrees C). Even at temperatures as low as -320 degrees F (-196 degrees C), the Kevlar bi-directional fabric tapes show essentially no embrittlement or strength loss. They also have excellent dimensional stability.

Other design properties of Mutual’s Kevlar bi-directional fabric tapes include:

• The ability to be combined with most commercially available resins
• The ability to adapt easily to standard processes used with glass fibers
• High stress rupture life
• Excellent cyclic tension fatigue resistance
• Good vibration damping characteristics


Kelvar™ 49 Fabrics
StyleYarn TypeWeaveCountWeight
(oz/sq yd)

Kelvar™ 29 Fabrics
StyleYarn TypeWeaveCountWeight
(oz/sq yd)
K73515002 x 2 Basket35x3413.80.23

Typical Properties
Kelvar™ 29Kelvar™ 49Twaron 1000™Twaron HM 1055™
Tensile Strength:
Tensile Modulus:

Contact Us for More Information

For additional information or for a quote on any Mutual product, please Call Toll Free (800) 523-0888 or (215) 927-6000 or E-mail your request to or use the form below.

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707 W. Grange St. • Philadelphia, PA 19120 • Tel: (215) 927-6000 • Fax: (215) 927-3388 • Call Toll Free (800) 523-0888 Outside of PA