Aramid fiber is mainly divided into two types, para-aramid fiber (PPTA) and meta-aramid fiber (PMIA). Since the 1960s, DuPont (DuPont) of the United States successfully developed aramid fiber and took the lead in industrialization. , In more than 30 years, aramid fiber has gone through the process of transition from military strategic materials to civilian materials, and the price has also been reduced by nearly half.
Now let’s see what the difference is between meta-aramid and para-aramid.
Poly-m-phenylene isophthalamide fiber is called meta-aramid for short; poly-para-phenylene terephthalamide fiber is called para-aramid for short.
1. The molecular arrangement is different. The meta-aramid fiber has a zigzag molecular chain arrangement; the para-aramid fiber has a linear molecular chain arrangement.
2. The production process is different. Para-aramid uses a two-step method, which requires high equipment and complicated processes; meta-aramid only needs one step.
3. Different uses. Meta-aramid is widely used as bonding fiber in manufacturing special paper-based materials; para-aramid fibers are used in high-performance paper-based materials.
