Case study of hollow fiber forming using pneumatic core wet spinning silk thread and separation technology applied in multiple fields

The hollow fiber spinneret adopts a coaxial double hole structure, with different solutions injected into the inner and outer layers to form a hollow structure. The spinning solution is extruded through the spinneret, and the core solution is injected from the central tube at the same time, forming a "tube in tube" structure.

Wet spinning is a commonly used method for preparing hollow fibers, suitable for shaping thermosensitive polymer materials such as polysulfone, cellulose, chitosan, etc.

Hollow fibers can be applied in multiple fields, such as membrane separation technology, biomedical, textile and composite materials, energy and environmental protection, etc.