Question

The density of polyester fibre is

• A. Greater than cotton
• B. Less than cotton but greater than wool
• C. Less than nylon
• D. Greater than nylon but less than polyethylene

Hint:

It helps to memorize approximate density values for the main fiber types. Generally: Cellulosics (cotton, rayon)>Protein (silk, wool)>Synthetics (polyester>nylon>acrylic>polypropylene>polyethylene).

Answer 1

The Correct Option is B

Step 1: Approximate Densities: Polyester (PET): ~1.38 g/cc Cotton: ~1.54 g/cc Wool: ~1.31 g/cc Nylon 6,6: ~1.14 g/cc Polyethylene: ~0.95 g/cc
Step 2: Comparing Densities: Polyester has a density less than cotton but greater than wool. It's denser than both nylon and polyethylene.