With gel spinning, the molecular weight of the raw material is of importance. Only with polymers of sufficient molecular weight, it is possible to create high strength yarn by the gel spinning method. However, not only sufficient molecular weight but also degree of polymer orientation as well as crystallinity are important for the fiber strength.
GEL SPINNING
Gel spinning refers to a synthetic yarn spinning technique where the polymer chips are not in a fully fluid state but a semi-fluid / semi-solid one. Gel spinning is also called semi melt spinning.
With gel spinning, the molecular weight of the raw material is of importance. Only with polymers of sufficient molecular weight, it is possible to create high strength yarn by the gel spinning method. However, not only sufficient molecular weight but also degree of polymer orientation as well as crystallinity are important for the fiber strength.
With gel spinning, the molecular weight of the raw material is of importance. Only with polymers of sufficient molecular weight, it is possible to create high strength yarn by the gel spinning method. However, not only sufficient molecular weight but also degree of polymer orientation as well as crystallinity are important for the fiber strength.
GEL SPINNING PRODUCTION PROCESS
Gel spinning roughly comprises the following production steps:
- dissolution
of the polymer in solvent
- extrusion
of the polymer through spinneret
- remove solvents
- drawing
to improve crystalinity and to maximize orientation