meta-aramid fiber

Meta-Aramid, also known as poly(m-phenylene isophthalamide) (MPDI) is a strong synthetic fiber that possesses low thermal shrinkage and excellent flame resistant properties.

It's key features are as follows :

• Flame Retardant : Meta-aramid self-extinguishes when removed from the flame. On exposure to a  flame, it hardens, starts to melt, discolors, and chars.
• Excellent Temperature Stability : The fiber can withstand temperature as high 220 degree Celsius without losing it's strength.
• Low Thermal Conductivity : The fiber is characterized by low thermal conductivity resulting in high heat insulation which makes it suitable for  electrical insulation. 
• Comfortable Material : The zigzag patterned configuration of  meta-aramid provides for a more textile like physical properties, making it suitable for protective gears.
• Chemical Resistant :  It is resistant to acids and alkalis except for few strong ones. 
• Moderate Strength : In comparison to para-aramid, meta-aramid is less strong as it's strength is equal to that of a steel.

Meta-Aramid fibers are produced from the Wet Spinning Process.

• First the polymer is dissolved in sulphuric acid to form aramid dope. 
• This dope is then forced through a spinneret in the spin bath in order to obtain the fiber. 
• Here the sulphuric acid solution is removed from the fiber. 
• At last, the fibers formed are drawn, dried and heat-set.