2018-07-25 12:33:03

Para-Aramid Fiber

Para-aramid fiber properties and brands

Para aramid fiber short for portmanteau of "aromatic polyamide fiber (PPTA fiber) is a high performance synthetic fiber with high strength, high modulus,chemical resistance, flame retarded, high temperature resistance, low desnity, outstanding abrasion resistance, . Aramid fiber is currently the most commonly used high performanced fiber (carbon fiber, UHMWPE fiber etc). In the 1960s, Dupont company developed a new aramid fiber material 1414. This aramid fiber was officially registered Kevlar®. From then on, Tenjin produced para-aramid Twaron®, Kolon Heracon®, Tayho Taparan®. For the big comsumption, market More production and brands occurs in the market. 


Brands

Density, g/cm3

Breaking tenacity, cN/dtex

Modulus,

cN/dtex

Elongation, %

LOI

Decomposing Temperature

Kevlar29

1.44

23.0

490

3.6

29

560

Kevlar49

1.45

23.6

780

2.4

29

560

Twaron reg

1.44

21

500

4.4

29

560

Twaron HM

1.45

21

750

2.5

29

560



·Excellent machanical properties

The most important properties of para-aramid is high strength and high modulus. Besides , it is great textle ability. The aramic cloth can be used as reinforcement for high strength FRP, ballistic cloth, protect board, cut resistant glove, high strength rope etc. The aramid fiber can be made as woven fabric, sleeve, tape, rope, thread to adapt the various application. 
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·Flame retarded and heat resistance

Para-aramid is a permanent flame retarded fiber and will not lose or reduce fire reistance properties because of service time and washing. The fiber’s LOI(limiting oxygen index) is 29. Therefore, the fiber will not continue burning when fire removed. Due to the molecular chain structure, para-aramid can work at high temperature, 84% strength retentaion at 48 hours exposure 180℃, glass transition temperature 300℃ and destruction temperature 560℃.

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Para-aramid fiber filament&spun yarn
Aramid continuous filament is a flat long fiber yarn which is usually used for ballistic products, FRP reinforcement, anti-cut gloves, cables, tyre lines, tape, rope etc.

kevlar yarn.jpg
Spun aramid yarn is made by short para-aramid fiber. The spun aramid fiber yarn is much more suitable to produce knitted, tatting textile as cotton or polyester. The spun fiber yarn is widely used for safety cloth textile, high temperature sewing thread.  
spun para aramid.jpg