Question

The percentage stretch employed in sizing of 2/40's P/V yarn meant for unconventional weaving is about

• A. 1.2
• B. 3.25
• C. 1
• D. 1.5

Hint:

• Stretch applied during sizing is critical for warp performance in weaving.
• For Polyester/Viscose (P/V) blends}, the stretch is limited by the viscose component, which has lower wet strength and extensibility than polyester.
• Typical stretch for P/V yarns is kept low, generally in the range of 0.75\% to 1.5\%}, sometimes up to 2\%.
• A value around 1.0\% is a common and safe target for many P/V yarns for shuttleless looms.
• Excessive stretch can damage viscose fibers or cause permanent elongation.

Answer 1

The Correct Option is C

To determine the percentage stretch employed in sizing of 2/40's P/V yarn meant for unconventional weaving, we must understand the context of yarn sizing. Sizing is a process applied to improve yarn quality before weaving. It involves the application of a protective adhesive coating, reducing yarn breakage during the weaving process.

In the context of unconventional weaving, a specific percentage stretch is employed to optimize yarn performance. It is important to note the balance between stretch and yarn performance; too much stretch can lead to weakened yarn, while insufficient stretch may not provide the necessary protection during weaving.

Among the given options, the typical percentage stretch employed in this context is 1%. This value represents an optimal point where the yarn maintains its integrity while receiving sufficient protective coating.

Conclusion:

The correct answer is 1, reflecting the percentage stretch commonly used for sizing 2/40's P/V yarn in unconventional weaving.