Question

Polyester fibre is manufactured by the process of:

• A. Wet spinning
• B. Dry spinning
• C. Melt spinning
• D. Gel spinning

Hint:

Most synthetic fibres like polyester and nylon are produced by melt spinning due to its efficiency and solvent-free nature.

Answer 1

The Correct Option is C

Step 1: Understanding fibre manufacturing processes.
Man-made fibres are produced by converting polymers into filaments using different spinning techniques. The choice of spinning method depends on whether the polymer can be melted or must be dissolved.
Step 2: Nature of polyester polymer.
Polyester is a thermoplastic polymer. It can be melted without decomposition and solidified again on cooling, making it suitable for melt-based processing.
Step 3: Explanation of melt spinning.
In melt spinning, the polymer is melted and extruded through spinnerets to form filaments. These filaments solidify upon cooling and are then drawn to improve strength and orientation.
Step 4: Analysis of options.
(A) Wet spinning: Used for polymers that cannot be melted, such as viscose rayon.
(B) Dry spinning: Used for polymers dissolved in volatile solvents, such as acetate fibres.
(C) Melt spinning: Correct — Polyester is manufactured using melt spinning.
(D) Gel spinning: Used for ultra-high molecular weight polymers like high-performance polyethylene fibres.
Step 5: Conclusion.
Since polyester can be melted and extruded without chemical degradation, melt spinning is the most suitable manufacturing process.