Question

The strength of a yarn is commonly expressed in terms of:

• A. Tenacity
• B. Elongation
• C. Evenness
• D. Crimp

Hint:

Always remember: {Strength = Force per unit linear density}, which is why tenacity is preferred over simple breaking force.

Answer 1

The Correct Option is A

The question asks about the term commonly used to express the strength of a yarn. Let's evaluate each option to determine the correct answer:

1. Tenacity:
   Tenacity is a measure of strength indicating the maximum stress a yarn can withstand per unit denier or tex (linear density). It is expressed in grams per denier (g/den) or other similar units. Tenacity is directly related to the inherent strength and durability of the yarn, making it the correct term for expressing yarn strength.
2. Elongation:
   Elongation refers to the extent a yarn or fiber can stretch before breaking. While it is a significant property regarding the flexibility or extensibility of yarn, it does not directly indicate strength.
3. Evenness:
   Evenness in yarn refers to the uniformity of its weight, diameter, and structure along its length. It is primarily related to quality and consistency, not strength.
4. Crimp:
   Crimp refers to the waviness of a fiber, influencing bulk, warmth, and elasticity in textiles but not a direct indicator of strength.

Based on the explanations above, the correct answer is Tenacity as it accurately describes the strength of a yarn.