Question

The cross section of spinneret used for producing hollow fibre

• A. C-shaped
• B. Rectangular
• C. Annular concentric
• D. Triangular

Hint:

Hollow fibres are always produced using spinnerets that allow controlled internal void formation, typically annular in design.

Answer 1

The Correct Option is C

Step 1: Understanding hollow fibre production.
Hollow fibres require a continuous void at the centre of the fibre along its length. This is achieved by controlled polymer flow during extrusion.
Step 2: Role of spinneret geometry.
An annular concentric spinneret consists of two concentric openings—an outer ring for polymer flow and an inner core for creating the hollow region.
Step 3: Analysis of options.
C-shaped, rectangular, and triangular spinnerets produce special solid cross-sections but do not generate a central hollow channel.
Step 4: Conclusion.
Therefore, an annular concentric spinneret is used to produce hollow fibres.