Gel Spinning

Gel spinning, also known as dry-wet spinning, is used to obtain high strength or other special properties in Theo fibres. The polymer is in a "gel" state, only partially liquid, which keeps the polymer chains somewhat bound together. These bonds produce strong inter-chain forces in the fibre, which increase its tensile strength. The polymer chains within the fibres also have a large degree of orientation, which increases strength. The fibres are first air-dried, then cooled further in a liquid bath. Some high strength polyethylene and aramide fibres are produced using this process.