Question

Tenacity of polynosic in g/den

• A. 3.5--4.5
• B. 8--8.5
• C. 2--3
• D. 1--2

Hint:

Polynosic fibres bridge the gap between regular viscose and high-tenacity rayon in terms of strength.

Answer 1

The Correct Option is A

Step 1: Understanding polynosic fibre.
Polynosic fibre is a modified viscose rayon with higher crystallinity and molecular orientation compared to regular viscose.
Step 2: Effect on strength.
Due to improved structural order, polynosic fibres exhibit higher tenacity than ordinary viscose rayon.
Step 3: Typical tenacity values.
The standard tenacity range of polynosic fibres lies between 3.5 and 4.5 g/den.
Step 4: Conclusion.
Hence, the correct tenacity range of polynosic fibre is 3.5--4.5 g/den.