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How to Select Yarn Count for Specific Fabric GSM

How to Select Yarn Count for Specific Fabric GSM
Rofiquzzaman Raju
Fabric Technologist,
B.J.Group, Mawna, Gazipur
Chittagong Textile Engineering College
Facebook: https://www.facebook.com/ERZRAZU



Yarn Count:
Yarn count is very useful to know the condition of yarn. I mean, yarn is thick or thin. So we can define count in the following way,

The yarn count is a numerical expression which indicates the coarseness or fineness of a yarn.

Fabric GSM:
GSM means Grams per Square Meter. Fabric GSM means weight of one square meter fabric in grams. GSM plays an important role in textile industry. It is widely used in case of knit fabric measurement. By this we can compare the fabrics in unit area which is heavier and which is lighter.

How do Select the Correct Yarn Count for Your Specific Fabric GSM?
How to select yarn count for specific fabric GSM is a very common and technical task for textile engineers. By the using following formula you can easily select the actual yarn count for knit the fabric. These are varying for fabric types.

Single Jersey:
Say, the require GSM is 160

Yarn count = (-0.141) X (GSM) + 50.22
= (-0.141) X (160) + 50.22
= -22.58 + 50.22
= 27.66

So, to knit 160 gsm single jersey fabric we need yarn count 27.66/s

Interlock:
Say, the require GSM is 220

Yarn count = (-0.206) X (GSM) + 80.56
= (-0.206) X (220) + 80.56
= -45.32 + 80.56
= 35.24

So, to knit 220 GSM Interlock fabrics we need yarn count 36/s

Pique:
Say, the require GSM is 220

Yarn count = (-0.146) X (GSM) + 57.16
= (-0.146) X (220) + 57.16
= -32.12 + 57.16
= 25.04

So, to knit 220 GSM Pique fabric we need yarn count 36/s

1*1 Rib:
Say, the require GSM is 220

Yarn count = (-0.123) X (GSM) + 54.57
= (-0.123) X (220) + 54.57
= -27.06 + 54.57
= 27.51

So, to knit 220 GSM 1x1 Rib fabrics we need yarn count 28/s

Double Lacoste:
Say, the require GSM is 220

Yarn count = (-0.167) X (GSM) + 64.36
= (-0.167) X (220) + 64.36
= -36.74 + 64.36
= 27.62

So, to knit 220 GSM Double Lacoste fabrics we need yarn count 28/s

Lycra 1×1 Rib:
Let, required fabric GSM is 180

Yarn Count = (-0.119) GSM + 59.12
= (-0.119) x 180 + 59.12
= -21.42 + 59.12
=37.7

Lycra 2x2 Rib:
Say, the require GSM is 220

Yarn count = (-0.108) X (GSM) + 56.62
= (-0.108) X (220) + 56.62
= -23.76 + 56.62
= 32.86

So, to knit 220 GSM Lycra 2x2 Rib fabrics we need yarn count 32/s


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8 comments:

  1. Dear TC Boss,
    Actually I am knitting job holder. I like all of your post.Many thanks for this great works . Now I am suffer for some inquiry. But I don't get any provable documents.
    Q1. How to get lycra % from running knitting machine?
    Please help me

    ReplyDelete
    Replies
    1. first you find loop lengths for both yarn and lycra.
      formula=counts*lycra looplength/yarn looplength/lycra counts*100

      Delete
  2. What meaning formula(-0.108)*gsm+56.62 old explain. My what's up number 9244449292

    ReplyDelete
  3. Yarn Count Calculation

    Fabrication Yarn count
    1 100% cotton S/J 4320/GSM Ans
    2 95% CTN 5% Els S/J 6000/GSM Ans
    3 100% CTN 1x1 Rib 6180/GSM Ans
    4 Lycra 1x1 Rib 6800/GSM Ans
    5 100% CTN 2x2 Rib 5400/GSM Ans
    6 Lycra 2X2 Rib 7480/GSM Ans
    7 100% CTN PQ 5200/GSM Ans
    8 100% CTN Single Lacoste 5200/GSM Ans
    9 100% CTN Double Lacoste 5600/GSM Ans
    10 100% CTN Interlock 7480/GSM Ans
    11 Lycra Interlock 8800/GSM Ans
    12 100% CTN F.Terry 5800/GSM Ans
    13 CTN Waffle/Thermal 6400/GSM Ans

    ReplyDelete
  4. SIR I DID NOT UNDERSTAND WHAT THE NUMBERS YOU GIVEN IN THE FROMULA EXPECT GSM...PLS EXPLAIN MORE

    ReplyDelete
  5. Sir, How you derived the formula ? Can you explain please ?? I wanna learn from the root.
    Thanks.

    ReplyDelete