Aramids are man-made fibers with enhanced structural properties, known for their incredible tensile strength. They are used in advanced products where light weight, yet high strength is needed. Aramid fibers are made from long-chain synthetic polyamides. The chemical composition of para-aramid is poly para-phenyleneterephthalamide (PPTA). This polymer is composed of alternating benzene ring and amide groups, leading to a rigid, rod-like structure.
Characteristics of aramid fibers
Aramids fibers show resistance to many solvents and salt, but can be weakened by strong acids. While they are difficult to dye and sensitive to UV light, they are hard to burn, and instead of melting, they decompose.
Aramid products are available as filament yarn, staple fiber or pulp. They retain much of their strength at high temperatures and resist permanent deformation or ‘creep’ under prolonged stress. Their toughness surpasses steel, glass fiber and nylon, and they show high durability even under extreme tension and bending, making them incredibly versatile.
Meta-aramid vs para-aramid
The difference between meta- and para-aramids lies in the alignment of their chemical bonds. Para-aramids have bonds that run along the length of the fiber, contributing to their high tensile strength. Meta-aramids have bonds arranged in a zigzag pattern, resulting in a lower tensile strength compared to para-aramids.
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