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Selection of Yarn Count for Various GSM for Different Fabrics

Selection of Yarn Count for Various GSM for Different Fabrics
Raju Tex
Knitting Technologist,
B.J.Group, Mawna, Gazipur
Chittagong Textile Engineering College
Facebook: https://www.facebook.com/ERZRAZU



Yarn Count:
Count is a numerical value, which express the coarseness or fineness (diameter) of the yarn and also indicate the relationship between length and weight(the mass per unit length or the length per unit mass) of that yarn.
GSM:
GSM’ means ‘Gram per square meter’ that is the weight of fabric in gram per one square meter. By this we can compare the fabrics in unit area which is heavier and which is lighter.
 
Selection of Yarn Count for Various GSM for Different Fabrics
Fabrics/GSM
Plain or Single-jersey
Pique
1x1 Rib
Lycra
1x1 Rib
Lycra
2x2 Rib
Interlock
100
36.12
47.66
42.27
47.22
45.82
59.96
120
33.3
44.32
39.81
44.84
43.66
55.84
140
30.48
40.98
37.35
42.46
41.5
51.72
160
27.66
37.64
34.89
40.08
39.34
47.6
180
24.84
34.3
32.43
37.7
37.18
43.48
200
22.02
30.96
29.97
35.32
35.02
39.36
220
19.2
27.62
27.51
32.94
32.86
35.24
240
16.38
24.28
25.05
30.56
30.7
31.12

Relation among GSM, stitch length and yarn count can be derived from the following equation:


                               1
GSM……………………...........……, When yarn count and stitch length both are variables
               Yarn count (Ne) X Stitch length

                                          K
Or, GSM = …………………..........……….,            Where K is a constant
                    Yarn count (Ne) X Stitch length

Or, Yarn count (Ne) X Stitch length X GSM = K

                                                  K
Or, Stitch length = ………………………………
                               Yarn count (Ne) X GSM

Constant 'K' which can be derived as follows:
Fabrics
Constant K values
Single-jersey or Plain
12068.509
Double Lacoste
14855.2
1x1 Rib
16431.497
2x1 Rib
19005.333
Interlock
24013.8

These values may get up and down.It maybe changed. For getting more accurate results it needs more data from different industry.

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