Dyeing process of Lycra Single Jersey Fabric
Single Jersey Spandex (Lycra) Fabric
Dear All,
Today I will share with you a very important dyeing process. Sometimes
we got query from buyer for Fabric with spandex. All of these the most common
require fabrication is – 95% cotton 5% spandex, Single jersey , 160
GSM. From the fiber market we can got many kinds spandex for knitting the
fabric. Denier is the unit of Spandex. The common denier is 20D, 40D & 70D.
Fiber thickness of 20D is thin then 40D. And 70D is thicker than 40D. Lycra is
a brand (name) of Spandex.
In single jersey spandex fabric it is very difficult to
keep the GSM lower. If you intending to produce the s/j cotton spandex
fabric in between 155 to 165 GSM then please follow the below things:
Fabric 95% cotton 5% spandex, Single
Jersey, 160 GSM
Yarn count should be – 40/s comb
Spandex should be – 20D
Stitch Line should be – 2.80
Dyeing Process of Single Jersey Cotton Spandex
Fabric:
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1st step: After receive the grey fabric from knitting section in
tube form, in dyeing section, at first we slit the fabric by slitting
machine.
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2nd Step: Then we heat set the slitted fabric by stenter
machine for avoiding the creased mark. And also for the Dia & Grey GSM
fixing.
Dyeing the fabric (in the
winch)–
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Option A) If the dyeing factory has high pressure dyeing machine
(winch) then we should dye the fabric in open width.
§
Option B) If the dyeing factory has normal dyeing winch then we
should back sewing the open fabric to make it tube again.
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3rd Step: Scouring (detergent wash) the fabric in the dyeing
winch and released the water for perform the next process.
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4th Step: Labeling the fabric by labeling agent which
increased the PH of fabric.
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5th Step: Soda / Salt wash.
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6th Step: Mixing the specific color (reagent) for dye the fabric.
Or if fabric color is white then we used brightener chemical in this step. And step 06 is not require for
white color fabric.
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7th Step: Acid wash (after released color mixing
water)
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8th Step: Color fixing by fixer.
Finishing process of the fabric (After dyeing) –
If we are following option (A)
then step will be like as below
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9th Step: Stentering (heat setting) for adjust the Dia. For this
again stentering we called it double heat settings.
§
10th Step: Open compacting for control shrinkage of fabric
length.
If we are following
option (B) then step will be like as below
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9th Step: Slitting
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10th Step: Stentering (heat settings) for dia adjust.
§
11th Step: Open compacting for control shrinkage of
fabric length.
Now the fabric is ready for cutting. Please test the Shrinkage,
Color shade, Gsm before start cutting.
Hope, it will be helpful for all of you