Performance Analysis of Denim Garments by Bleach Wash (Part-7)

Performance Analysis of Denim Garments by Bleach Wash (Part-7)
Authors: Md. Anwarul Haque1
Ariful Hassan
2
Shantonu Paul Shuvra
Md. ShagorHossain
Textile Engineering College, Begumgonj, Noakhali.
Email: haquebd2014@gmail.com1 , arifulhassan034@gmail.com2


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Machines used for testing

Tensile tester
Qualities offers the most competitive line of Tensile Tester range in the industry. Our comprehensive range of Tensile Tester products, along with our extensive range of grips/fixtures, load cells, extensometers, offer the best price/quality ratio models on the market. High quality, accurate and reliable models with reasonable prices. The Q-Series Tensile Testers range is designed for quick and reliable tensile, compression, flexure (bending), shear, peel, fatigue cycling, and constant load tests on metals, composites, alloys, plastics, elastomers, textiles, and finished products.
Tensile tester
Tensile tester
Crock Meter Series
The Crock Meter Series is designed to test the discoloration extent of dry textile and leather after abrasion.

Yarn Package Durometer
The HPE Digital version of our Yarn Package Durometer has additional advantages. Prisms can be added onto the test stamp, making it easier to measure on spools with different dimensions.

Frazier Differential Pressure Air Permeability Tester
The Low Pressure Air Permeability Machine was developed by the National Institute of Standards and Technology of measuring the air permeability of textile type materials. and It is the acknowledged standard of the U.S. Government and the U.S. Textile Industry. The second model, High Pressure Air Permeability Machine is produced on the same principle as the Low Pressure Machine, but designed with a much greater versatility for use through its higher attainable airflow and differential pressure. Both models are extremely accurate and reliable, very easy to operate, and nearly maintenance free.

These machines were originally developed for measuring the air permeability of textile materials and are, in fact, the standard air permeability testing machines in the industry for quality control, research, development, performance and purchase specifications. It was quickly discovered that these machines are equally adaptable for measuring the air permeability with great accuracy and precision of any material that can be fitted to the physical dimensions of the machine. These materials include all fiber products such as paper, felt, nonwoven materials, filter’s and even wire cloth.

Washing condition

1st step: Different concentration
Bleaching powder 5g/l to 15g/l
SL
Concentration
Temperature
Time
1
5g/L
50oc
15 minutes
2
7.5g/L
50oc
15 minutes
3
10g/L
50oc
15 minutes
4
12.5g/L
50oc
15 minutes
5
15g/L
50oc
15 minutes

2nd step: Different temperature
SL
Temperature
Concentration
Time
1
40°c
10g/L
15 minutes
2
45°c
10 g/L
15 minutes
3
50°c
10 g/L
15 minutes
4
55°c
10 g/L
15 minutes
5
60°c
10 g/L
15 minutes

3rd step: Different time
SL
Time
Concentration
Temperature
1
20
10g/L
15oc
2
25
10 g/L
15oc
3
30
10 g/L
15oc
4
35
10 g/L
15oc
5
40
10 g/L
15oc

Recipe for bleach wash


1ststep : (desizing)
M: L = 1:10
Add desizing agent=0.6gm/L
Add detergent= 1gm/L
Temp =60oc
Time = 15-25 min
Drop the liquor
Hot wash at 60ocfor 5min

2nd step :( bleaching)
M: L= 1:8
Add bleaching powder =10gm/L
Add soda ash = 5gm/L
Temp = 60oc
Time = 12-15min
Drop the liquor
Rinse twice, each three times.

3rd step :( neutralization)
M: L = 1:8
Add sodium sulphite = 3gm/l
Temperature =40oc
Time = 10-15 min
Drop the liquor
Rinse once

4th step:(softening)
M: L =1:8
Add acetic acid =0.6gm/l
Add softener = 1gm/l
Time =5 min
Drop the liquor
Unload the garments

5th step: (hydro extractor)
Machine R.P.M =700-900
Time =2-5 min

6th step: (drying)
Temperature =60octo 70oc
Time = 40-50 min for hot wash
10-15 min for cold wash


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