Performance Analysis of Denim Garments by Bleach Wash (Part-8)

Performance Analysis of Denim Garments by Bleach Wash (Part-8)
Authors: Md. Anwarul Haque1
Ariful Hassan
2
Shantonu Paul Shuvra Md. ShagorHossain

Textile Engineering College, Begumgonj, Noakhali.
Email: haquebd2014@gmail.com1 , arifulhassan034@gmail.com2


Previous Part


WORKING PROCEDURE
Normally solid dyed cotton garments are washed with bleaching agent which reduces the color. So, fading effect on garments is produced.

The working procedure are given bellow in step by step-----

Step 01:
  • A lot size of 1.2kg garments (denim) is considered.
  • Load the machine with water at liquor ratio of 1:10
  • Switch is on for running the machine.
  • Add De-sizing agent to the liquor @ 3gm/l
  • Start steam supply to raise the temperature up to 60oc
  • Continue the process for 20 min.
  • Drop the liquor.
Step 02:
  • A lot size of 1.2 kg garments (denim) is considered.
  • Load the machine with water at liquor ratio 1:10
  • Switch is on for running of machine.
  • Add caustic soda to the liquor @ 2%
  • Add Bleaching agent( Hypochlorus) to the liquor @ 5 ml/l
  • Add stabilizer to the liquor @ 2.5 ml/l
  • Add soda ash to the liquor @2%
  • Start steam supply to raise the temperature up to 80oc
  • Continue process for 70 minutes
  • Drop the liquor.
Step 03:
  • A lot size of 1.2kg garments (denim) is considered.
  • Load the machine with water at liquor ratio of 1:9
  • Add sodium hyposulphite@ 3gm/l
  • Switch is on for running of machine.
  • Start steam supply to raise the temperature up to 60oc
  • Continue this process for 5 min
  • Drop the liquor
Step 04:
  • A lot size of 1.2kg garments is considered.
  • Load the machine with water at liquor ratio of 1:5
  • Start machine running.
  • Add acetic acid to the liquor @2ml/l
  • Add softener @1gm/l
  • Start steam supply to raise the temperature up to 60oc
  • Continue this process for 5 min.
  • Drop the liquor.
  • Unload the garments.
Step 05:
  • Hydro extraction the garments to remove wash of excess water from the washed garments.
Step 06:
  • Load the garments
  • Set Temperature 750C to 850C
  • Time @ 35 to 40 minutes for hot dry
  • Time @ 10 minutes for cold dry
Precaution of washing
  • Measurement of chemical should be taken carefully.
  • Concentration, time, temperature should be maintained properly for uniform bleach action.
  • Proper neutralization after bleaching.
  • Proper making the samples for various concentration, time, temperature.
  • Proper drying should be maintained.
  • Wash hands frequently to reduce the risk of exposure to blood borne diseases.
  • Wear gloves if there is even a possibility you might have contact with another person’s body fluids.
  • After the removal of gloves or after exposure to blood or other potentially infectious materials, wash hands with antibacterial soap.
  • Wear gloves once and discard; do not attempt to wash and reuse.
  • Clothing or supplies contaminated with body fluids should be placed in doubled plastic bags and tied.
Photographs of washed and unwashed sample
Fig1: Raw fabric                 Fig2: Sample 01                Fig3: Sample 02
Fig4: Sample 03                                 Fig5: Sample 04 

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