Question

Convolution count of a cotton fibre is defined as

• A. Number of convolutions in a fibre
• B. Number of convolution in a unit length of a fibre
• C. The average density of a fibre
• D. Average convolutions of a bunch of fibres

Hint:

Convolution count is a measure of the frequency of twists in a cotton fiber, not the total number of twists. It's expressed as convolutions per unit length. Higher convolution count generally means better fiber cohesion and yarn strength.

Answer 1

The Correct Option is B

Step 1: Understanding Cotton Fiber Morphology: Cotton fibers are not perfectly cylindrical; they have a flattened, ribbon-like structure with twists or reversals along their length called "convolutions." These convolutions are crucial for fiber-to-fiber friction and yarn strength.
Step 2: Defining Convolution Count: The convolution count is not simply the total number of convolutions in a single fiber (option a). It's a measure of how frequently these twists occur. Therefore, it's expressed as the number of convolutions per unit length (typically per millimeter or per inch). Option (b) correctly reflects this. Option (c) relates to density, and option (d) is about a group of fibers, not a single fiber's property.