Textile: Sodium Hydroxide and 2. 3. 4. 5. 6. 7. 8
Module Title: Textile Dyeing, Printing & Finishing. Module Code: TEX-203 Teacher Name: Md. Sadiqur Rahman Reference Book: Dyeing and Chemical Technology of Textile Fiber. By – E.R. Trotman Dyeing and Chemical Technology. By- V.A. Shenai Lecture: 02 Wet Processing: Wet processing is a technology which convents in grey fabric into finished fabric by the application of dye, water and auxiliaries. Wet processing is the combination of dyeing, printing and finishing. Sequence/Flow chart of wet processing:
Inspection of grey fabric Brushing Stitching Shearing and cropping Singeing Desizing Scouring Souring Bleaching (Optional) Mercerizing Dyeing Printing Washing Drying Finishing (Cotton/Flax) (Alkali) (Acid)
General theory of dyeing Dyeing is the process of coloring textile material by immersing them in on aqueous solution of dye which is called dye liquor to improve the off effectiveness of dyeing heat is applied in to the dye liquor the generally theory of dyeing explain the interaction among dye fabric and water. It explains: 1. Force of repulsion 2. Force attraction Force of repulsion Which are developed between dye molecules and water molecules?
Force of Attraction: Which are developed between dye molecules and fabric?
Basic dyeing curve:
Y Temperature (c`) 100 Soda 80 (X-30 = Y80) 60 Salt 40 (X-90 = Y-80)
20
(X-20 = Y-20)
(X-100 = Y-20)
Drop Liquor
Fabric (Day+Water+ auxiliaries) 10 20 30 40 50 60 70 80 90 100 X
Time (Min)
Lecture: 03 Singeing: Singeing is the pre-treatment of wet processing to remove all the projecting, loose and hairy fibers by the application of heat. Objectives: 1. To remove all the projective, loose and hairy fibers. 2. To improve the lecture of dyeing. 3. For even dyeing and printing. Singeing Machine:
1. Plate singeing machine. CU Plate Thickness 1-4” 150-250 yards /min fabric speed. Guide roller, 1 pair of drawing roller.
Dyeing Roller Draw Roller Left to right fabric move
2. Rotary
Inspection of grey fabric Brushing Stitching Shearing and cropping Singeing Desizing Scouring Souring Bleaching (Optional) Mercerizing Dyeing Printing Washing Drying Finishing (Cotton/Flax) (Alkali) (Acid)
General theory of dyeing Dyeing is the process of coloring textile material by immersing them in on aqueous solution of dye which is called dye liquor to improve the off effectiveness of dyeing heat is applied in to the dye liquor the generally theory of dyeing explain the interaction among dye fabric and water. It explains: 1. Force of repulsion 2. Force attraction Force of repulsion Which are developed between dye molecules and water molecules?
Force of Attraction: Which are developed between dye molecules and fabric?
Basic dyeing curve:
Y Temperature (c`) 100 Soda 80 (X-30 = Y80) 60 Salt 40 (X-90 = Y-80)
20
(X-20 = Y-20)
(X-100 = Y-20)
Drop Liquor
Fabric (Day+Water+ auxiliaries) 10 20 30 40 50 60 70 80 90 100 X
Time (Min)
Lecture: 03 Singeing: Singeing is the pre-treatment of wet processing to remove all the projecting, loose and hairy fibers by the application of heat. Objectives: 1. To remove all the projective, loose and hairy fibers. 2. To improve the lecture of dyeing. 3. For even dyeing and printing. Singeing Machine:
1. Plate singeing machine. CU Plate Thickness 1-4” 150-250 yards /min fabric speed. Guide roller, 1 pair of drawing roller.
Dyeing Roller Draw Roller Left to right fabric move
2. Rotary