Types Of Aramid Fibers

Aramid fibers mainly include fully aromatic polyamide fibers and heterocyclic aromatic polyamide fibers, which can be divided into three types: ortho-aramid fibers, para-aramid fibers (PPTA) and meta-aramid fibers (PMTA). Among them, industrial products mainly include meta-aramid and para-aramid. The main difference between these two types of aramids is the different connection positions between the amide bond and the C atom on the benzene ring.

Para-aramid
Para-aramid, also known as poly(p-phenylene terephthalamide) (PPTA), is also known as aramid 1414 in my country. It is a linear polymer in which more than 85% of the amide bonds in the molecular chain are directly bonded to the aromatic ring. It is the world's first fiber made from polymer liquid crystal spinning solution, creating a new era of high-performance synthetic fibers.

Meta-aramid
Meta-aramid, also known as poly(p-phenylene isophthalamide) (PMTA), is also known as aramid 1313 in my country. Meta-aramid is the fastest growing seed crystal in organic high-temperature resistant fibers. The fiber molecules are composed of amide groups and meta-phenyl groups interconnected, and the molecular chains are straight and serrated. Due to the strong hydrogen bonding between molecules, the fiber has excellent flame retardancy, thermal stability, radiation resistance and other properties.