cellulosic regenerated fibers—rayon
the first—many regeneration processes were developed
commercial production of viscose rayon began in 1910 in the US—sold a ‘artificial silk’ until rayon was adopted in 1924
produced as a filament until discovered that scraps could be used as staple fibers…now filament tow
Cupra rayon—cuprammonium
Viscose rayon—regular rayon (weaker than HWM)
High-wet-modulus (HWM) rayon—aka HP (high performance)