Question:
Pre Needling and Final Needling differs in
Pre Needling and Final Needling differs in
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Pre-needling stabilizes web; final needling develops strength.
Updated On: Jun 29, 2026
- WW
- Speed of loom
- Width of loom
- ND and strokes
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The Correct Option is D
Solution and Explanation
Concept:
Needle punching is a mechanical bonding process in which barbed needles entangle fibers to form a nonwoven fabric. Pre-needling and final needling are two stages of consolidation.
Step 1: Pre-needling stage.
• Light entanglement
• Stabilizes loose web
Step 2: Final needling stage.
• Strong bonding
• High fabric integrity
Step 3: Difference factor.
They differ mainly in:
• Needle density (ND)
• Number of strokes
Step 4: Final answer.
\[ \boxed{\text{ND and strokes}} \] Thus, \[ \boxed{\text{Option (D) is correct.}} \]
Step 1: Pre-needling stage.
• Light entanglement
• Stabilizes loose web
Step 2: Final needling stage.
• Strong bonding
• High fabric integrity
Step 3: Difference factor.
They differ mainly in:
• Needle density (ND)
• Number of strokes
Step 4: Final answer.
\[ \boxed{\text{ND and strokes}} \] Thus, \[ \boxed{\text{Option (D) is correct.}} \]
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