Question

In nonwoven fabric manufacturing, the melt spinning process produces \(\underline{\hspace{2cm}}\)

• A. Spun bonded web
• B. Aerodynamically formed web
• C. mechanically formed web
• D. wetlaid web

Hint:

Connect the raw material and process for nonwovens: - Molten Polymer \(\rightarrow\) Melt Spinning \(\rightarrow\) Spunbond / Meltblown. - Staple Fibers \(\rightarrow\) Carding/Airlaid/Wetlaid \(\rightarrow\) Mechanically/Aerodynamically/Wetlaid formed webs.

Answer 1

The Correct Option is A

Step 1: Understand the question. It asks what type of nonwoven web is produced directly from a "melt spinning" process. 
 

Step 2: Analyze the spunbond process. The spunbonding process starts with a thermoplastic polymer (e.g., polypropylene, polyester) which is melted and then extruded through a spinneret to form continuous filaments. These filaments are then drawn (stretched), cooled, and laid down directly onto a moving conveyor belt to form a web. The process integrates spinning, web formation, and sometimes bonding into a single continuous step. This matches the description "melt spinning process produces... web". 
 

Step 3: Analyze the other options. 
- Aerodynamically formed web (Airlaid): This process uses staple fibers (short fibers), which are dispersed in a stream of air and then deposited onto a conveyor to form a web. It does not involve melt spinning. 
- Mechanically formed web: This is a broad category. A common method is carding, which uses staple fibers. This is a mechanical process, not melt spinning. 
- Wetlaid web: This process uses staple fibers dispersed in water, which are then filtered onto a screen to form a web, similar to papermaking. It does not involve melt spinning. 

Conclusion: Melt spinning is the core of the spunbond process, which directly produces a spun bonded web.