1

ASEMINAR

ONKawabata Evaluation System

Submitted toFACULTY OF ENGINEERING & TECHNOLOGYRAJASTHAN TECHNICAL UNIVERSITY, KOTA

for

The Partial Fulfillment of the Requirements for Degree of Bachelor of Technologyin

Textile Technologyby:

HARISH PARATE07EMBTT029

Under the guidance of

Dr.V.P.SinghDepartment Of Textile Technology

M.L.V. TEXTILE & ENGG. COLLEGE BHILWARA (RAJASTHAN)(An Engineering College of the Rajasthan Govt.)

2010-11

Contents1.INTRODUCTION.2.KES-F.3. SUBJECTIVE ASSESSMENT OF FABRIC HANDLE.4. OBJECTIVE EVALUATION OF FABRIC. HANDLE.5 KES-F EQUIPMENTS.6.Standard test parameters.7.HESC data chart.8.Refrences.

(1.) INTRODUCTIONProf. Kawabata of Japan has carried out a great deal of work with the aim of replacing the subjective assessment of fabrics by experts with an objective machine based system which will give consistent and reproducible results.

(2.) KAWABATA EVALUATION SYSTEM F0R FABRIC (KES-F)

KES-F is generally agreed that the stimuli leading to the psychological response of fabric handle are entirely determined by the physical & mechanical properties of fabrics.(A)Subjective assessment of fabric

handle.(B) Objective evaluation of fabric

handle.

(A)SUBJECTIVE ASSESSMENT OF FABRIC HANDLE

The first part of Kawabata’s work to find agreement among experts on what aspect of handle were important and how each aspect contributed to the overall rating of the fabric

Contents

(B) OBJECTIVE EVALUATION OF FABRIC HANDLE

The second stage of Kawabata’s work was to produce a set of instruments with which to measure the appropriate fabric properties and then to correlate these measurements with the subjective assessment of handle .The aim was that the system would then enable any operator to measure reproducible the total hand value of a fabric.

KES-F EQUIPMENTS

KES -FB1 : TENSILE AND SHEARING

KES-FB2 : BENDING

KES-FB3 : COMPRESSION

KES-FB4 : SURFACE FRICTION AND VARIATION

KES-FB1 INSTRUMENT

SHEAR:Shear properties are measure of inter –yarn friction force, the represent the stability of fabric to withstand inplane mechanical distortion. It measured to a maximum shear angle of ± 8º.TENSILE:A constant tensile force I is applied to the fabric is one direction and the amount of stretch is measured. This isdeformation is called” Strip Biaxial Deformation. The deformation rate is kept constant at 0.2mm/sec.

KES-FB2 INSTRUMENTBENDING :In this test a fabric sample is bent first one way and then in the oppositedirection, as indicated in Figure. The instrument applies a linearlyincreasing bend curvature (which is the reciprocal of the bend radius) to asample of fabric, whilst at the same time monitoring the bending momentdeveloped.

KES -FB4 INSTRUMENT

Surface characteristic :An assessment of the "roughness" of a fabric's surface is effectively madeby dragging a U-shaped wire across it, as illustrated schematically

REFERENCES1-Lecture notes from Manchester textile Institute.

2-Principal of textile testing, E.P.Booth.

3-Textile testing and quality control, Grover.

4-Physical testing of textile, Savila, Woodhead Publisher.

5-Fabric testing, Woodhead Publisher