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PREPARATORY PROCESSES R.B.CHAVAN Dept. of Textile Technology Indian Institute of Technology Hauz-Khas, New Delhi 110016
CLASSIFICATION OF TEXTILE FIBRES ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
CLASSIFICATION OF TEXTILE FIBRES ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Natural fibres ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Natural Protein fibres ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Regenerated natural fibres ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Synthetic fibres ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Synthetic fibres ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Chemical processing ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Chemical processing operations ,[object Object],[object Object],[object Object],[object Object]
Preparatory Processes  ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Fabric manufacturing   ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Operations before Preparatory Processes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Grey fabric inspection  ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Chemical processing step
Fabric faults Stains   Thick place  Missing end or pick  Hole
Grey fabric inspection machines Individual piece inspection (Mannual)
Grey fabric inspection machine (Continuous length  (Manual)
Grey fabric inspection machine
fabric inspection machine  Digital cameras, computerized
Stamping   Lot card ,[object Object],[object Object],[object Object],[object Object],[object Object]
Lot card ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Mechanical operations ,[object Object],[object Object],[object Object]
Brushing   ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Shearing/Cropping ,[object Object],[object Object],[object Object]
Four cutter shearing machine
Singeing  ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Gas singeing machine
Composition of cotton ,[object Object],Constituent % Cellulose 88 Oils and Waxes 0.5 Pectins 0.7 Proteins 1.1 Colouring matter 0.5 Mineral Matter  1.0 Moisture 8.0
Fats and Waxes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Fats and Waxes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Reactions ,[object Object],[object Object],OH-CH2 OH-CH OH-CH2 = (C17H35COO) 3  C3H5 + 3H2O Wax C17H35COOH + OHC28H57 = C17H35COOC28H57
Pectins  ,[object Object],[object Object],[object Object],Some COOH groups are present as Ca and Mg salts Free acid and Ca and Mg salts are insoluble in water
Proteins ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Colouring matter  ,[object Object],[object Object],[object Object]
Mineral Matter ,[object Object],[object Object],Potassium carbonate 44.8 Potassium chloride 9.9 Potassium sulphate 9.3 Calcium sulphate 9.0 Calcium carbonte  10.3 Magnesium sulphate 8.4 Ferric oxide 3.0 Aluminium oxide 5.0

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Lecture 1 tt 241 introduction