Aramid is an inherently flame-retardant fabric that, due to its unique physical and chemical properties, demonstrates broad application prospects across numerous fields. Also known as aromatic polyamide fiber, it is a high-performance synthetic fiber produced by spinning specialized resins. It possesses a unique molecular structure, consisting of long chains formed by the alternating linkage of amide bonds and aromatic rings. Based on differences in molecular structure, aramid is primarily classified within the industry into three types: meta-aramid (Aramid I, 1313), para-aramid (Aramid II, 1414), and heterocyclic aramid (Aramid III). So, what exactly are the uses and characteristics of aramid?
I. Uses of Aramid
1. Filaments
2. Short-fiber pulp
3. Paper
4. Fabrics and composite materials
5. Aerospace applications
6. Military applications
7. Transportation
8. Telecommunications
9. Tires
II. Types of Aramid
1. Ortho-aramid
2. Para-aramid (PPTA)
3. Meta-aramid (PMTA)
III. Advantages of Aramid
It possesses exceptional performance characteristics, including high strength, high modulus, resistance to high temperatures as well as acids and alkalis, lightweight properties, electrical insulation, and resistance to aging. Furthermore, it features a stable chemical structure, offers safety in combustion, and boasts a long service life.
IV. Disadvantages of Aramid
It exhibits poor light fastness and UV resistance; it is intolerant of strong acids and strong alkalis; it possesses low compressive strength and compressive modulus; the bonding strength at the fiber-to-resin interface is low; it has poor moisture absorption properties; and it is susceptible to hydrolysis.