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: Identify the question's focus: the nonwoven web type created directly by "melt spinning."

Step 2: Examine the spunbond process. This method begins with a molten thermoplastic polymer (e.g., polypropylene, polyester) forced through a spinneret to create continuous filaments. These filaments are stretched, cooled, and deposited onto a moving conveyor, forming a web. The process combines spinning, web formation, and sometimes bonding in a continuous manner. This aligns with the "melt spinning process produces... web" description.

Step 3: Evaluate alternative options:
- Aerodynamically formed web (Airlaid): This uses short staple fibers dispersed in air and deposited on a conveyor, excluding melt spinning.
- Mechanically formed web: This is a broad category, often using carding with staple fibers. This is a mechanical process, not melt spinning.
- Wetlaid web: This method uses staple fibers dispersed in water and filtered onto a screen, similar to papermaking, and does not involve melt spinning.

Conclusion: The spunbond process, utilizing melt spinning, directly yields a spunbond web.