Question

Which of the following is not a parameter of KES-f?

• A. SMD
• B. G
• C. F
• D. $\frac{2HB}{T_m}$

Hint:

• KES-F measures low-stress mechanical and surface properties of fabrics.
• Key parameters include:
  • Tensile: LT, WT, RT
  • Bending: B (bending rigidity), 2HB (bending hysteresis)
  • Shear: G (shear stiffness), 2HG (shear hysteresis)
  • Compression: LC, WC, RC, TM (thickness)
  • Surface: MIU (friction coeff.), MMD (friction fluctuation), SMD (surface roughness)
• "F" as a standalone symbol is not a standard KES-F parameter name. Ratios of parameters like $2HB/T_m$ are derived, not primary parameters.

Answer 1

The Correct Option is C

The KES-F system (Kawabata Evaluation System for Fabrics) is a widely used method to objectively measure the mechanical properties of fabrics, which affect the feel or "handle" of the fabric. It quantifies various parameters related to fabric texture, stiffness, elasticity, and surface properties.

Some important parameters measured in the KES-F system are:

• SMD (Surface Roughness Parameter): This measures the roughness of the fabric surface by analyzing the surface friction and smoothness. It helps in understanding how soft or rough the fabric feels.
• G (Geometrical Roughness): This parameter represents the geometrical variation of the fabric surface, indicating texture irregularities such as yarn thickness variation and fabric weave effects.
• \(\frac{2HB}{T_m}\): This is related to the bending rigidity of the fabric. Here, \(HB\) is the bending hysteresis and \(T_m\) is the fabric thickness. This ratio helps to quantify the bending behavior of fabric under applied force.

On the other hand, F is not a recognized parameter within the KES-F evaluation system. It is neither related to surface properties, bending, nor mechanical deformation parameters measured by KES-F.

Thus, among the given options, F is not a parameter of KES-F.