Comparative study for Melt Dry & Wet spinning

==	Melt	Dry	Wet
Investment cost	Low	High	Low
Environment of Health hazard	Non toxic	Toxic & risk of accident	Toxic
Heat input	High	Very high	Low
Solvent	Not required	Only organic	Organic
Solidification	Cooling	Evaporating	Coagulating
Spg  Speed	1000-2000 m/min	600-1200 m/min	60-160 m/min

Table of typical Wet Spinning solvent and coagulant

Fiber	Solvent	Coagulant
Viscose	Aqueous of sodium salt & xanthate  ester	Dilute H2SO4+Na2SO4+ZnSO4
Acrylic	Dimethyl-acetamide (DMA)	50% aqueous  Dimethyl-acetamide
PVA	DMF (Dimethyle Formide), Water	30% aqueous DMF
Spandex	DMA	30% aqueous DMA