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Differences between Kevlar and Twaron

Differences between Kevlar and Twaron

If you’re in the market for a high-quality ballistic fiber, you’ll likely encounter Kevlar and Twaron. Both fibers are made from aramid, but they have different properties that can make them better or worse suited for specific applications. Here’s a breakdown of the differences between Kevlar and Twaron.

What is Kevlar?

Kevlar is a material typically used in bulletproof vests and other body armor. It is made of long, interwoven fibers of Kevlar, which are incredibly strong and resistant to tearing. This makes Kevlar an ideal material for protecting against high-impact forces, such as bullets or shrapnel. Kevlar vests have been shown to be incredibly effective at saving lives in combat situations. In addition to being used in body armor, Kevlar is also often used in other protective gear, such as helmets, gloves, and footwear. It is also used in a variety of industrial applications, due to its strength and heat resistance. Kevlar is an incredible material that has a wide range of uses and continues to save lives every day.

What is Twaron?

  • Twaron is a high-strength para-aramid synthetic fiber developed in the early 1980s by Teijin, now otherwise known as Teijinconex. Twaron is used in a variety of industrial and military applications where extremely strong and durable fibers are required, such as bulletproof vests, tires, composite materials for automobiles and boats, aircraft brakes, and protective clothing for firefighters and workers in hazardous environments.
  • The exceptional strength and heat resistance of Twaron makes it an ideal material for these demanding applications. Twaron is also notable for its low density, high specific strength tensile modulusYoung’s modulus Flexural modulus Shear modulus Compressive strength toughness, and resistance to creep, making it an excellent choice for a wide range of engineering applications.
  • Twaron is produced using a state-of-the-art spun yarn process that results in a highly uniform and consistent product. This makes Twaron an outstanding performer in demanding applications where reliability and consistency are critical.

Differences between Kevlar and Twaron

Kevlar and Twaron are both man-made fibers with a high resistance to wear and tear. Kevlar is stronger than Twaron, but Twaron is more resistant to heat. Kevlar is often used in bulletproof vests and other body armor, while Twaron is used in tires and aerospace applications.

  • Kevlar is made from polyaramide, while Twaron is made from polyaramid. Kevlar is produced by DuPont, while Twaron is produced by Teijin. Kevlar was invented in 1965, while Twaron was invented in 1971.
  • Kevlar is used in a variety of applications, including canoes, fishing lines, and skis. Twaron is used in tennis racket strings and body armor. Kevlar has a melting point of 2,700 degrees Fahrenheit, while Twaron has a melting point of 3,000 degrees Fahrenheit. Kevlar is \ UV resistant, while Twaron is not.
  • Kevlar decomposes at 1,000 degrees Celsius, while Twaron decomposes at 1,500 degrees Celsius. Kevlar is available in a variety of colors, while Twaron is only available in yellow.
  • Kevlar has a density of 1.44 grams per cubic centimeter, while Twaron has a density of 1.7 grams per cubic centimeter. Kevrar is stronger than steel on an equal-weight basis, while Twaron is half as strong as Kevlar on an equal-weight basis.

Kevlar can be woven into fabric, while Twaron cannot be woven into fabric. Kevlar degrades over time when exposed to sunlight or chemicals, while Twaron does not degrade over time when exposed to sunlight or chemicals.


Kevlar and Twaron are both types of aramid fiber, but they have some key differences. Kevlar is stronger and more heat resistant, while Twaron is lighter and less stiff. Both fibers have their pros and cons depending on the application, so it’s important to choose the right one for your needs. Have you ever used Kevlar or Twaron in a project? Let us know in the comments!

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