Question 50 (Textile Engineering & Fibre Science)
The tear resistance of woven fabric increases with
|(P)||Increase in yarn to yarn friction|
|(Q)||Increase in yarn strength|
|(R)||Increase in thread spacing|
|(S)||Increase in float length|
A)P,Q,R B)Q,R,S C)P,R,S D)P,Q,S
Option B is correct
Frequently Asked Questions | FAQs
What is tear strength of woven fabric?
Tear strength is a mechanical property that measures the resistance of a woven fabric to tearing or propagating a tear once it has been initiated. It quantifies the force required to tear a fabric in a specified direction.
Tear strength is an important property for fabrics, as it relates to their durability, resistance to damage, and overall performance in applications where tearing forces may be present, such as clothing, upholstery, or industrial textiles.
The tear strength of woven fabric is typically measured using standardized testing methods, such as the Elmendorf Tear Test or the Tongue Tear Test. These tests involve cutting a specific shape or notch in the fabric and then applying force to propagate the tear.
The tear strength value is reported in units of force, usually in Newtons (N) or pounds-force (lbf). It can be expressed as:
Single Tear Strength: This represents the force required to tear the fabric in a single direction, usually along the warp (machine) or weft (crosswise) direction.
Trapezoidal Tear Strength: This represents the average force required to tear the fabric in both the warp and weft directions. It is measured using a trapezoidal-shaped test specimen.
The tear strength of a woven fabric can vary depending on several factors, including the fiber type, fabric construction, yarn properties, fabric finishing, and any additional treatments or coatings applied to the fabric.
Higher tear strength values indicate that a fabric is more resistant to tearing and can withstand greater forces before tearing or failure occurs. Fabrics with higher tear strength are generally considered to be more durable and suitable for applications that require resistance to tearing forces.
It’s worth noting that tear strength is just one of several properties that contribute to the overall performance and suitability of a fabric for a specific application. Other factors, such as tensile strength, abrasion resistance, flexibility, and elongation, also play important roles in determining the fabric’s durability and performance in real-world conditions.