Melt spinning of polymers involves the forcing of polymer melt through spinnerettes (fine holes) into an atmosphere kept at a temperature lower than the melting point of the polymer, which causes the fine diameter polymer melt to harden into filaments. Melt spinning is not used in case of the __________ fibres.

• A. Polyester
• B. Nylon 6:6
• C. Polypropylene
• D. Acrylic

Answer: (D)