Dry spinning: The polymer is dissolved by the use of a volatile solvent to form a viscous liquid suitable for spinning. The spinning mucus is extruded from the spinneret to form a filament stream, and the solvent in the filament stream is rapidly volatilized and solidified by a hot air sleeve, and the yarn is drawn into a yarn. (Polyvinyl chloride, acrylic, vinylon, vinegar)

Wet spinning: The fiber-forming polymer is dissolved in a solvent to form a spinning solution. The spinning solution is sprayed from the spinneret and discharged into the coagulation bath. As a result of solvent diffusion and coagulation in the filament flow To penetrate into the mucus filament stream to coagulate the filament into a filament. Wet spinning is characterized by a large number of spinneret holes, but the spinning speed is slow, suitable for spinning short fibers, and dry spinning for spinning filaments. Usually with the same variety of chemical fiber using dry spinning more wet spinning fiber structure is uniform, good quality.

Melt spinning: the polymer heated to the appropriate temperature above the melting point to prepare the melt, the melt by the screw extruder, by the metering pump out of the nozzle hole, so that the formation of fine flow into the air, the Condensed into thin strips. Solution spinning: Select the appropriate solvent, dissolve the fiber-forming polymer into a spinning solution, or first make the polymer material into a soluble intermediate, dissolve it into a spinning solution, and then spin it. Viscose, vinylon, acrylic and more use of this method. The solution spinning is divided into wet spinning and dry spinning according to the different curing conditions.