Textile Testing-I

Introduction of textile testing, sampling techniques, random and biased sampling, square, cut square, zoning technique, selection of sample for testing, grading of cotton fibre with respect to staple length, understanding of national and international testing standards.

Atmospheric conditions for testing, absolute & relative humidity, moisture regain &moisture content, importance of moisture in textiles, measurement of moisture regain & content, effect of moisture on physical & mechanical properties of textile material, factors affecting the regain, correct numerical weight, oven dry weight, Dry and wet bulb hygrometer, control of testing room atmosphere.

Measurement of cotton fibre properties- length, length uniformity, span length, upper-half mean length, fineness, strength, maturity, trash, colour by conventional methods and using HIV, AFIS, determination of Fibre Quality Index, Spinning Consistency Index. Measurement of manmade fibre properties- length, fineness, strength, and crimp; wrapping test for lap, sliver and roving.

Yarn numbering system, determination of yarn count, diameter, average & resultant count of folded yarn, relation between Ne, Denier, Tex, Nm. Instruments used for determination of yarn count, Yarn twist, classification of twist, twist measurement, direct counting method, twist-untwist method.

• capacitance principles measurement; Yarn imperfections and yarn faults (Classimat system), limit irregularity, index of irregularity, Spectrogram and variance-length curve analysis; Yarn hairiness and its principle of measurement.
• Grand total of lectures required = 36