Summary:Spandex fiber overcomes quality defects such as stress, strain properties, count range and flexibility of rubber yarns.
Spandex fiber overcomes quality defects such as stress, strain properties, count range and flexibility of rubber yarns.
It was first produced by dry spinning. Today, there are roughly four production methods:
DRY SPINNING, a method in which the solution is solidified into silk due to the volatilization of the solvent under the hot air flow.
Production process: solution----spinning pump----drying box, 100 ℃ hot air blows through to make the solution volatilize----spinning----winding molding.
Spinning speed: from 200 to 800M/min.
Spinning temperature: 200 to 230°C.
Fiber fineness: 22.2～1244dtex.
Features: The process pollution is large, the process is complicated, and the cost is high.
MELT-SPINNING, a method in which the polymer is heated to above the melting point to become a melt and become a filament.
Production process: Polymerization without solvent----Pelletizing----Slicing at constant temperature----Cleaning and removing impurities----Drying----Dehydration----Entering screw press Made into a solution - spinneret extrusion - cooling through a cold box - winding forming.
Spinning speed: from 600 to 1600M/min.
Spinning temperature: 160～220℃.
Fiber fineness: 9～1100dtex.
Features: short process, low cost and low pollution.