This presentation discusses the process of knit fabric dyeing. It is presented by MD. Mostafijur Rahman and Anan Wahid Riaz, students in the Textile Evening 41 Batch. The presentation covers the steps in knit fabric dyeing, which include grey fabric inspection, batching, scouring, bleaching, enzyme treatment, dyeing, hydro extractor/dewatering, slitting, stentering, compacting, and final inspection. The dyeing of knitted fabrics occurs through an exhaust method or batch-wise process, which is similar to yarn dyeing but has some differences in quality measurement.

1. Welcome to our Presentation
NAME: MD. MOSTAFIJUR RAHMAN
ID: 191-23-586
TEXTILE EVENING- 41 BATCH
Name: Anan Wahid Riaz
ID: 191-23-635
TEXTILE EVENING-41 BATCH

2. Presentation Topic:
KNITTED FABRIC DYEING
Submitted To,
Md. Kamrul Islam
Lecturer
Department of Textile Engineering
Faculty of Engineering
Daffodil International University

3. What is Knit fabric dyeing!!
KNIT DYEING IS A TECHNIQUE OF DYEING KNITTED FABRICS.
THE DYEING OF KNITTED FABRICS OCCURS IN THE EXHAUST
METHOD OR IN BATCH-WISE PROCESS. THE KNIT DYEING PROCESS IS
NEAR SIMILAR TO THE YARN DYEING PROCESS BUT THERE IS SOME
DIFFERENCE IN QUALITY MEASUREMENT

4. Flow Chart of Knit Fabric Dyeing
Grey Fabric Inspection
Batching(loading in the machine)
Scouring
Bleaching
Enzyme Treatment
Dyeing
Hydro Extractor/De watering
Slitting
Stentering
Compacting
Final Inspection
Delivery and printing Zone

5. Grey Fabric Inspection
• STOP MARK
• PICK FAULTS
• WRONG DENSITY
• OIL STAIN
• DESIGN BREAK
• HOLE
• CRACK
• MISSING ENDS
• SLUBS ETC.
VIDEO LINK: #5. GREY FABRIC INSPECTION

6. Batching process
I. RECEIVE BATCH CARD FROM GREY IN CHARGE
II. MAKE THE PRIORITY AS PER DYEING
III. TAKE ONE SPECIFIC BATCH CARD
IV. CHAKE AVABITLITY OF THE FABRIC
V. TAKE REQUIRED QUANTITY OF BODY FABRIC FROM WARE HOUSE
VI. MAKE REQUIRED NO ROPE MAINTAINING EQUAL LENGTH
VII. TAKE COLLAR /CUF IN EACH ROPE EQUALLY ENSURE EQUAL LENGTH
VIII. STITCH FABRIC
IX. WRITE THE TOTAL WEIGHT IN BATCH CARD

7. Scouring
SCOURING IS THE FIRST PROCESS CARRIED OUT WITH OR WITHOUT CHEMICALS, AT
ROOM TEMPERATURE OR AT SUITABLE HIGHER TEMPERATURES WITH THE ADDITION
OF SUITABLE WETTING AGENTS, ALKALI AND SO ON. SCOURING REMOVES ALL THE
WAXES, PECTIN'S AND MAKES THE TEXTILE MATERIAL HYDROPHILIC OR WATER
ABSORBENT

8. Bleaching
BLEACHING IS THE CHEMICAL TREATMENT FOR REMOVAL OF NATURAL
COLORING MATTER FROM THE FABRIC. THE SOURCE OF NATURAL COLOR
IS ORGANIC COMPOUNDS WITH CONJUGATED DOUBLE BONDS, BY DOING
CHEMICAL BLEACHING THE DISCOLORATION TAKES PLACE BY BREAKING
CHROMOPHORE. THE MATERIAL APPEARS WHITER AFTER THE BLEACHING
SCOURING AND BLEACHING RUN TOGETHER IN SAME BATH SO, THE TEMP.
WILL BE RISE 95 DEGREE CELSIUS AND PH. IS 11 WITH 30-40 MINUTES .
AFTER BLEACHING WE CAN USE MERCERIZING IF THE BUYER HAS ANY
REEQUIPMENTS THAN WE DO THAT OTHERWISE DON’T NEED THAT

9. Enzyme Treatment/Biopolishing
 TO REMOVE HAIRY FIBRE
 TO REMOVE SHORT FIBER
Biopolishing is a process of using cellulases for surface
modification of cellulosic fabrics to reduce the hairiness and
increase the resistance to pilling. This is achieved by the hydrolysis
of cellulose, eliminating the superficial microfibrils of the cotton
fibers

10. Dyeing
KNIT DYEING MACHINES:
1. HANK DYEING MACHINE
2. PACKAGE DYEING MACHINE
3. BEAM DYEING MACHINE
4. JET DYEING MACHINE
5. JIG DYEING MACHINE
6. PADDLE DYEING MACHINE
7. WINCH DYEING MACHINE
8. SAMPLE DYEING MACHINE

11. Hydro Extractor/De Watering
 TO REMOVE EXTRA WATER IN THE FABRIC SURFACE
DEWATERING IS PERFORMED DE-WATERING IS THE PROCESS TO REMOVE THE
WATER FROM THE FABRIC COMPLETELY BY SQUEEZING AND IT IS DONE BY THE
PADDER. A SUITABLE EXPANDER IS USED BEFORE THE FABRIC IS PASSED THROUGH
THE NIP OF THE PADDERS, WHICH EXPANDS THE FABRIC FLAT WISE AND ADJUST
THE WIDTH

12. Slitting
ONE KIND OF CUTTING MACHINE . KNIT FABRIC ACTUALLY FROM TUBELAR
SO THERE IS NEEDLE MARK WHERE GSM IS LOW THAT’S WHY WE HAVE TO
CUT THAT WHICH IS CALLED SLITTING . THERE IS A LOT OF MACHINE OF
SLITTING

13. Stentering
IF WE WANT TO RIGHT DIA,
IF WE HAVE TO RIGHT GSM,
IF WANT TO FABRIC SOFTENING,
IF THERE IS ANY PROBLEM OF STRIPE, OVER ALL WE
CAN DO RIGHT WAY WITH THIS STENTERING

14. Compacting
IF WE WANT TO RISE GSM THAN ITS IS SO USEFUL . OK BUT NOT TOO MUCH . ITS
LIKE WE NEED 165 BUT WE HAVE 155 THAN IT CAN POSSIBLE. (HIGHEST RANGE 10)
SOME TIME SHADE VARIATION HAPPENS THAT TIME SOME HOW THIS COMPACTING
MODE IS WORKED WELL WHEN A EXPERIENCE MAN DO IT .
THE COMPACTING MACHINE IS ALSO CALLED COMPACTOR OR
FELT COMPACTOR. THIS MACHINE IS GENERALLY EQUIPPED WITH TWO
STEAM CHAMBERS AND TWO FELT UNITS. ... TUBULAR MACHINES FOR THE
SHRINKAGE OF TUBULAR KNITTED FABRICS. OPEN WIDTH MACHINES FOR
THE SHRINKAGE OF OPEN WIDTH KNITTED FABRICS.

15. Final Inspection
FINAL INSPECTION IS THE LAST STEPS OF GARMENT INSPECTION
SYSTEM. IN THIS STAGE COMPLETE GARMENTS ARE INSPECTED
BY BUYER. DIFFERENT PARTS OF GARMENTS ARE INSPECTED IN
THIS STAGE SUCH AS GARMENTS MAIN FABRIC, ACCESSORIES,
TRIMS, LABEL, FABRIC FAULTS ETC.

16. That’s all about our Presentation