What Is Cotton Interlock knit fabric? It’s Knitting, Dyeing, Finishing Development.

Cotton Interlock knit fabric is a cotton fabric that is knitted on the same machine as the knitwear. It has interlocking ribs, so it’s stretchier than other fabrics and can be worn by people of different sizes. The fabric is also made up of two rows of yarns which are twisted together to form alternating rib patterns. Cotton Interlock is made up of 100% cotton fibers, making it breathable and soft for the wearer.

Cotton Interlock knit fabric is an often-used fabric for everyday garments. It is also commonly used in hospital gowns, children’s clothes, and linings for jackets. The fabric is made of cotton fibers woven together to create a tight weave that does not unravel or pull apart easily. This provides durability and allows the fabric to maintain its shape after washing.

cotton-interlock-knit-fabric

Knitting, Dyeing, finishing development of 100% Cotton Interlock knit fabric

Cotton Interlock knit fabric is the special type of fabric of the textile industry. I am sharing my personal development of a 100% cotton interlock fabric. I am sharing the actual data which I got. This is about the development from yarn to finish fabric. Let’s start…..

I will show about the target fabric and which I got after the experiment.

Target Parameter of the fabric:

Fabric Type: Interlock knit fabric

Composition: 100% cotton

Color Name: Affogat

Fabric Diameter: 185 cm open.

Fabric GSM: 240.

Knitting of 100% Cotton Interlock knit fabric :

The imported Yarn parameter:

Yarn count and Type34/1 Cotton
Yarn composition100% cotton
Yarn lotAccording to supplier
Yarn BrandNot shareable

Knitting Parameter of 100% Cotton Interlock knit fabric:

Machine  Dia and Gauge36*24
Total needle5428
Stitch length28.0
Machine NoNa
Machine BrandUnitex
Machine RPM15
Grey Width190 cm open
Grey GSM
Gray Wash
Gray Wash GSM

Dyeing of Cotton Interlock knit fabric :

Here will discuss the dyeing flow chart, dyeing process, dyeing recipe, and Dyeing sequence image

Dyeing flow chart of 100% Cotton Interlock knit fabric :

Dyeing flow chart of  100% Cotton Interlock knit fabric

Description of the flow chart:

Collect from knitting gray store

Batching

Provide a batch bard which contains all the related information

Load the fabric according to batch card

Scouring and Bleaching

Enzyme

Dyeing

Soaping

Softening

Delivery to finishing

Dyeing Process of Dyeing flow chart of 100% Cotton Interlock knit fabric:

Load the fabric

Anticreae+Detergent Inject = For remove impurities

Wash and Drain

Detergent+Anticreasing agent+Oil remover+Peroxide stabilizer inject

Caustic soda dossing 10min

Run time 5min

Rise temperature at 70 ⁰C

Inject the Hydrogen peroxide

Rise the temperature 98 ⁰C

Run time 60 min

Cooling at 78 ⁰C

Shade check = Check the whiteness and absorbency

If ok drain

Normal hot at 80 ⁰C

Run time 10 min

Inject Acetic acid = For neutralization of Soda

Run time 5min

Drain and wash for 5min

Peroxide killer Inject run for 5min

Drain and wash 10min

Rise the temperature at 55 0c

Control PH= 4.5 with acetic acid

Inject Enzyme

Run time 40min

Check sample hairiness

If ok then raise the temperature at 80 0c

Run 5min

Drain and wash the enzyme dust

Start dyeing

Leveling pH check= PH 5.5 – 6;

Levelling Dosing 600c 5 minute

Runtime 10 minute

Color Dosing 25 minute

Runtime 10 minute

Salt dosing 10 minutes

Runtime 10 minute

Salt Sample Check and Fabric Quality check = The evenness of dyes

If ok then

1st Soda dosing 20 minutes (10%)

Runtime 10 minute

2nd Soda dosing 20 minutes (80%)

Run time 15min

Sample Check

Shade ok and then drain (Rinse drain is better)

Normal, not 80 0c run 10min

Wash until clear the loose dyes (Not more than 20min)

Inject soaping agent

Rise 90 0c and run 10min

Check shade if the ok drain

Wash clear

Fixing agent dos 5min

Runtime 10min

Wash clear

Softener dossing 7min

Check softness if ok

Unload and deliver to finishing

Finishig of Dyeing flow chart of 100% Cotton Interlock knit fabric:

Finishing flow chart:

Finishing flow chart of  100% Cotton Interlock knit fabric :
Finishing flow chart

Slitting Parameter:

Machine Speed40
Padder pressure1.5 kg
Over Feed
Fabric In Diameter36
Fabric Out Diameter185

Stenter/Compacting

Stanter/Dryer Compacting 
Width set188  
Over Feed59%Temperature120
Temperature130Steam Pressure30
RPM/ Speed20Width set180
Padder Pressure3+2Over feed%35%
VibrationRPM/Speed12
Softener TypeCationicCompaction%
After Dry Width185After Width180
After Dry GSM182After GSM235
  Palla Wash gsm255

Final width=   180                            Final GSM=235

Shrinkage with tumble dry:

Length=-5%

Width=-3%

SP%=2%

Shrinkage with Line dry:

Length=-2.4%

Width=-0.7%

SP%=0.0%

Comments: I think All are most same for bulk production.

Testing of 100% Cotton Interlock knit fabric

Conclusion of Test Results:

Sl. No.Test NameResults (A)
01Dimensional Change in WashingPass
02Spirality After WashingPass
03Color Fastness to WashingPass
04Color Fastness to RubbingPass
05Color Fastness to PerspirationPass
06Bursting StrengthPass
07Pilling ResistancePass
08Mass Per Unit AreaPass

01. Dimensional Change in Washing

Test Method : ISO 5077+ ISO 3759+ ISO 6330: 2012

Test Condition: Normal Program, Machine Wash@40°C, Line Dry in Shade, Used domestic washing machine Wascator, 20 gram ECE  Reference Detergent with 2.0kg load.

Sample (A)After One Wash 
DirectionResultClient Requirement
Length-2.4%±5%
Width-0.7%

Remark: (+) Means Extension And (-) Means Shrinkage

02. Spirality After Washing

Test Method: ISO 16322-3: 2005

Test Condition: Mild Program, Machine Wash@30°C, Line Dry in Shade, Used domestic washing machine Wascator, 20 gram ECE  Reference Detergent with 2.0kg load.

Sample (A)ResultClient Requirement
Spirality0.0%Max 4%

03. Color Fastness To washing

Test Method: ISO 105 CO6-A1S :2010

Test Condition: Temperature at 40 degree, Time 30 min, Detergent 4g/l ECE With 10 Steel Balls

Sample (A)ResultClient Requirement
Color Change43-4
Color staining 3-4
-Acetate4-5 
-Cotton4-5 
-Nylon4-5 
-Polyester4-5 
-Acrylic4-5 
-Wool4-5 

04. Color Fastness To Rubbing

Test Method: ISO 105 X12 :2016

Test Stage: As Received Stage

Sample (A)ResultClient Requirement
Dry Rub4-53-4
Wet Rub4-53

05. Color Fastness To Perspiration

Test Method: ISO 105 E04:2013

Test Condition: Temperature at 37±2 degree, Time 4 hours.

Sample (A)ResultClient Requirement
 AcidAlkaline 
Color Change444
Color staining  3-4
-Acetate4-54-5 
-Cotton4-54-5 
-Nylon4-54-5 
-Polyester4-54-5 
-Acrylic4-54-5 
-Wool4-54-5 

06. Bursting Strength

Test Method: ISO 13938-2:2019, used 50 cm2 dia

Test Stage: As Received Stage

Sample (A)ResultClient Requirement
Average210.9 kPa125 kPa

07. Resistance Of Pilling (ICI Box Method)

Test Method: EN ISO 12945-1:2020

Sample (A) Result  
After 10800 Cycle Length Direction Width Direction 
Grade  
Note: Pill & Fuzzy effects are observed

 Visual Assessment 

Grade Description
5No Change
4Slight Surface fuzzing and/or partially formed pills.
3Moderate surface fuzzing and/or moderate pilling. Pills of varying size and density covering the specimen surface.
2Distinct surface fuzzing and/or distinct pilling. Pills of varying size and density covering a large proportion of the  specimen surface.
1Dense surface fuzzing and/or severe pilling. Pills of varying size and density covering the whole of the specimen  surface.

08. Mass Per Unit Area

Test Method: EN 12127: 1998

Test Stage: As Received Stage

Sample (A)ResultClient Requirement
Average228.0 g/m2240 g/m2(±5%)

Conclusion:

We discuss “What Is Cotton Interlock knit fabric” and I think there is no confusion about it. I share here the complete knitting dyeing and finishing Process and experiment. All in the information are a self-practical experiment.

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