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Kevlar : Heat-resistant and Strong Synthetic Fiber

Kevlar Material

Kevlar : Heat-resistant and Strong Synthetic Fiber

Kevlar is a heat-resistant and strong synthetic fiber, the high-strength material was first used commercially in the early 1970s as a replacement for steel in racing tires.

It has many applications, ranging from bicycle tires and racing sails to bulletproof vests, all due to its high tensile strength-to-weight ratio; by this measure it is five times stronger than steel. It also is used to make modern marching drum heads that withstand high impact.

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Kevlar

Kevlar is certainly an asset when building large structures. With a less rigid composition than steel however, it could reform the way we think of large load-bearing structures.

It maintains its strength and resilience down to cryogenic temperatures (−196 °C); in fact, it is slightly stronger at low temperatures.

At higher temperatures the tensile strength is immediately reduced by about 10–20%, and after some hours the strength progressively reduces further. For example: enduring 160 °C (320 °F) for 500 hours, its strength is reduced by about 10%; and enduring 260 °C (500 °F) for 70 hours, its strength is reduced by about 50%

Several grades of Kevlar are available:

 

K-29

K49

 K100

 

 

 

K119

K129

K149

in industrial applications, such as cables, asbestos replacement, tires, and brake linings.

high modulus used in cable and rope products.

colored version of Kevlar

Kevlar

 

higher-elongation, flexible and more fatigue resistant

higher tenacity for ballistic applications

highest tenacity for ballistic, armor, and aerospace applications 

Is Kevlar costly ?

Yes, it is costly to produce, involving a complex process of spinning fibers and the use of sulfuric acid.

Strength of Kevlar

It is five times stronger than steel on an equal weight basis and provides reliable performance and solid strength.

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