Melt spinning: The polymer is heated to an appropriate temperature above the melting point to prepare a melt, the melt by a screw extruder, the metering pump out of the spinneret holes to form a fine stream into the air, the Condensed into a thin strip.

Solution spinning: Select the appropriate solvent to dissolve the fiber-forming polymer into spinning solution, or the first polymer made of soluble intermediate, and then dissolved into a spinning solution, and then spinning. Viscose, vinylon, acrylic and more use this method. Solution spinning according to different coagulation conditions are divided into wet spinning and dry spinning.

Dry spinning: the use of volatile solvents to dissolve the polymer, made viscous liquid suitable for spinning. The spinning mucilage is extruded from the spinneret to form a filament stream, which is solidified by rapid evaporation of the solvent in the filament stream through a hot air sleeve and drafted into the filament. (Lanlan, acrylic, vinylon, vinegar fiber)

Wet spinning: the fiber-forming polymer dissolved in a solvent to prepare a spinning solution, the spinning solution is jetted from the spinneret after discharge into the coagulation bath, due to diffusion of mucus filaments flow and solidification The agent penetrates into the mucus filament stream, causing the filament to coagulate into a thread.

Wet spinning is characterized by a large number of spinneret holes, but the spinning speed is slow, suitable for spinning staple fibers, and dry spinning suitable for spinning filaments. Usually with the same type of chemical fiber dry spinning using wet spinning fiber structure than the uniform, better quality.