Question

Which one of the following spinning system gives higher production rate?

• A. Melt spinning
• B. Dry spinning
• C. Wet spinning
• D. Spin drawing

Hint:

Melt spinning is generally the fastest due to the absence of solvents. Remember the order: Melt>Dry>Wet in terms of typical production speed. Spin drawing is a separate process, not a primary spinning method.

Answer 1

The Correct Option is A

Step 1: Understanding Different Spinning Processes: Melt Spinning: Polymer is melted and extruded through spinnerets, then solidified by cooling. It's used for polymers that can be easily melted without degradation (e.g., polyester, nylon, polypropylene). Dry Spinning: Polymer is dissolved in a volatile solvent, extruded, and the solvent is evaporated, leaving the solid fiber. Used for polymers like acrylic, acetate, and spandex. Wet Spinning: Polymer is dissolved in a solvent, extruded into a coagulation bath where the polymer precipitates and solidifies. Used for polymers like rayon and some acrylics. Spin Drawing: This isn't a spinning system itself, but a post-spinning process where fibers are stretched to increase orientation and crystallinity, improving strength and other properties.
Step 2: Comparing Production Rates: Melt spinning is the fastest because it involves a direct, continuous process of melting, extrusion, and solidification by cooling. The other methods involve solvent handling (dissolution, evaporation, or coagulation), which adds extra
Steps and slows down the process. Melt spinning speeds can reach thousands of meters per minute. Dry and wet spinning are considerably slower.