Producing Twaron requires three processes: polymerization, filament yarn spinning and conversion. View the complete production process.
During the first stage, monomers are converted into a firm fine-grained polymer powder. This material has the typical thermal and chemical properties of para-aramid. However, it has not yet acquired the reinforcing properties of yarn or pulp. This fine powder can be used to improve the properties of plastic components.
Filament yarn spinning
The second stage involves dissolving the polymer in sulfuric acid to produce a liquid crystalline solution. This solution is then spun into fine, natural yellow or dope-dyed black filament yarn (the diameter of each filament is as small as 12µm). The structure of the yarn is virtually 100% paracrystalline, with molecular chains running parallel to the axis of the fiber. It is this high degree of orientation that contributes to the extraordinary properties of Twaron filament yarns.
Conversion to staple and short cut fiber
Converting to pulp
To produce pulp, the yarn is first cut, then suspended in water and fibrillated. Then it is either packed straight away, to be marketed as wet pulp, or dehydrated and dried for sale in the form of dry pulp.