Alkali Optimization
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OBJECTIVES:• •
Optimization of alkali To print given cotton fabrics with the help of Reactive paste having different alkali concentration and then testing to observe from which best results are observed.
APPARATUS: Beaker, stirrer CHEMICALS REQUIRED FOR STOCK PASTE: Sodium alginate [3-12 %] Urea Ludigol Water
30-120g/l 100-200g/l 10g/l 1000 ml
PROCEDURE: • • • • • •
First of all, about 1liter of water was taken in a beaker, followed by the addition of sodium alginate 3% of the weight of paste to be prepared. This mixture was then stirred vigorously using a high speed stirrer. The viscosity of paste was then measured with the help of viscometer. The amount of Sodium alginate was optimized to obtain a viscosity level of 13000 centipoises. Urea was added and again viscosity was measured. The increase or decrease in viscosity was noted.
OBSERVATIONS: Viscosity of paste before addition of urea = 13500 centipoise Viscosity of paste after addition of urea = 12500 centipoise
PREPARATION OF PRINT PASTE
APPARATUS: Beaker, stirrer CHEMICALS REQUIRED FOR PRINT PASTE: Stock paste (made as above) Alkali [3-4.5%] Reactive dye [4%]
30-45 g/l 40 g/l
PROCEDURE: • • •
The prepared stock paste was divided into 4 equal parts i.e. 250ml each. Ludigol (mild oxidizing agent) was then added. Each paste was identified as: 1. 2. 3. 4.
•
contains alkali 3% contains alkali 3.5% contains alkali 4% contains alkali 4.5%
Printing procedure was same and done one by one by each paste
PRINTING OF COTTON FABRIC MACHINE USED: • •
Flat bed printing machine Stenter
PROCEDURE: • • • • • •
The fabric sample was printed using the flat bed machine. The fabric was then dried at 110oC for 1 min through stenter. It was then cured at 170oC for 2 min. The fabric sample was then washed. The procedure was repeated for each paste one by one from 1 to 4. Testing was carried out on the fabrics and results were compared to find out, which concentration of alkali gave the best results.
RESULTS SAMPLES
SUBMITTED TO:
SIR QAMAR ZIA SB.
SUBMITTED BY:
USAMA HAFEEZ 03 NTU 126 MAHSUM NASIM 03 NTU 106 RIZWAN AKBAR 03 NTU 114 UMER BHALLI 03 NTU 206 IJAZ AHMED NIAZI 03 NTU 218 SECTION:
C [PROCESSING] SEMESTER;
7TH
NATIONAL TEXTILE UNIVERSIRY FAISALABAD
Optimization of alkali To print given cotton fabrics with the help of Reactive paste having different alkali concentration and then testing to observe from which best results are observed.
APPARATUS: Beaker, stirrer CHEMICALS REQUIRED FOR STOCK PASTE: Sodium alginate [3-12 %] Urea Ludigol Water
30-120g/l 100-200g/l 10g/l 1000 ml
PROCEDURE: • • • • • •
First of all, about 1liter of water was taken in a beaker, followed by the addition of sodium alginate 3% of the weight of paste to be prepared. This mixture was then stirred vigorously using a high speed stirrer. The viscosity of paste was then measured with the help of viscometer. The amount of Sodium alginate was optimized to obtain a viscosity level of 13000 centipoises. Urea was added and again viscosity was measured. The increase or decrease in viscosity was noted.
OBSERVATIONS: Viscosity of paste before addition of urea = 13500 centipoise Viscosity of paste after addition of urea = 12500 centipoise
PREPARATION OF PRINT PASTE
APPARATUS: Beaker, stirrer CHEMICALS REQUIRED FOR PRINT PASTE: Stock paste (made as above) Alkali [3-4.5%] Reactive dye [4%]
30-45 g/l 40 g/l
PROCEDURE: • • •
The prepared stock paste was divided into 4 equal parts i.e. 250ml each. Ludigol (mild oxidizing agent) was then added. Each paste was identified as: 1. 2. 3. 4.
•
contains alkali 3% contains alkali 3.5% contains alkali 4% contains alkali 4.5%
Printing procedure was same and done one by one by each paste
PRINTING OF COTTON FABRIC MACHINE USED: • •
Flat bed printing machine Stenter
PROCEDURE: • • • • • •
The fabric sample was printed using the flat bed machine. The fabric was then dried at 110oC for 1 min through stenter. It was then cured at 170oC for 2 min. The fabric sample was then washed. The procedure was repeated for each paste one by one from 1 to 4. Testing was carried out on the fabrics and results were compared to find out, which concentration of alkali gave the best results.
RESULTS SAMPLES
SUBMITTED TO:
SIR QAMAR ZIA SB.
SUBMITTED BY:
USAMA HAFEEZ 03 NTU 126 MAHSUM NASIM 03 NTU 106 RIZWAN AKBAR 03 NTU 114 UMER BHALLI 03 NTU 206 IJAZ AHMED NIAZI 03 NTU 218 SECTION:
C [PROCESSING] SEMESTER;
7TH
NATIONAL TEXTILE UNIVERSIRY FAISALABAD
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