FABRIC HANDLE

KAWABATA EVALUATION SYSTEM OF FABRIC (KESF):

1. KES-FB1 ® Tensile and shearing

2. KES-FB2 ® Bending

3. KES-FB3 ® Compression

4. KES-FB4 ® Surface friction and variation

Total 16 parameters explained showned in the table and explained in detail below,

 Tensile LT Linearity of load extension curve WT Tensile energy RT Tensile resilience Shear G Shear rigidity 2HG Hysteresis of shear force at 0.5º 2HG5 Hysteresis of shear force at 5º Bending B Bending rigidity 2HB Hysteresis of bending moment Later compression LC Linearity of compression thickness curve WC Compressional energy RC Compressional resilience Surfce characteristics MIU Coefficient of friction MMD Mean deviation of MIU SMD Geometrical roughness Fabric construction W Fabric weight per unit area To Fabric thickness

KES-FB 1:

Stressed up to 500gf/cm --------> 500gf/cm load

 Sample is clamped between 2 Jaws with effective test area of 5/L cm x 20/W cm and subjected to a constant tension of 10gf/cm by a weight attached to the drum on which one jaw is mounted. Constant tension is applied by allowing the drum to rotate freely. The shear force is measured by a transducer connected to the other jaw which moved sideways to apply the shear deformation and the shear strain is detected by potentiometer

(a) WT = Tensile energy =

= Area under the load – extension

(b) Linearity (LT)

(c) Resilience (RT)

(d) Shear Rigidity G slope of curve between 0.5º and 2.5º shear Angle
(e) 2HG = Hysteresis of shear force at 0.5º shear angle
(f) 2HG5 = Hysteresis of shear force at 5.0º shear angle

 Click on Image to run the animation

 KESF-FB 1 Animation

KES-FB-2:

 Fabric sample is bent between the curvatures –2.5 and +2.5cm-1

(g) B = Slope between 0.5 and 1.5cm-1 curvature

(h) 2HB = Hysteresis of bending moment at curvature 1cm-1.

 Click on Image to run the animation

KES-FB-3:

 The compressional properties between two plates and increasing the pressure while continuously monitoring the sample thickness upto a max. pressure of 50gf/cm2(0.49N/cm2). Compressional measurement is done by KES-F-3 as shown in Figure. The principle of the apparatus is shown in Fig. is an example of the recorded curves. The integration of the curve is computed by the computing block automatically. The signal from the transducer is passed the filter having prescribed frequency response and integrated to compute SMD.
(i) LC = Linearity of compression curve
Area under compression curve / Area of triangle (T0 AThe)

(j) WC = Compressional energy

(k) RC = Compressional resilience

 Click on Image to run the animation

KES-FB4:

(l) MIU = mean value of coefficient of friction,

(m) MMD = mean deviation of coefficient of friction (b)

(n) SMD = Geometrical roughness

 Click on Image to run the animation

(o) W = fabric weight per unit area and

(p) To = fabric thickness

are also reported in KESF system.