Study on Thread Count and Thread Density

Study on Thread Count and Thread Density

Mofizur Rahaman Akash
B.Sc in Textile Engineering
World University of Bangladesh
Cell: +88 01818766765
Email: akashcox@yahoo.com




Thread 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. Therefore, the concept of yarn count has been introduced which specifies a certain ratio of length to weight. Thread count is expressed by warp and weft yarn. Thread count is very important for GSM and cover factor. But the GSM and cover factor are also depend on the thread density.

From the Table-1 and Figure-1; we have seen that the highest warp count is 40 Ne of Plain and the lowest warp count is 8 Ne (16+16) of Boxy. Also we see that the highest weft count is 40 Ne of Plain and the lowest weft count is 5 Ne (10+10) of Ottoman. Ne (English Count) is the indirect system. In theoretically higher Ne must be finer than lower Ne. So all the results we have collected regarding thread count comply with the theory.

Table-1: Thread count of different types of woven fabric
Sample
Thread count
Warp
Weft
Dobby
32
20
Boxy
16+16=8
16+16=8
Rib stop
21
21
Oxford
40+40=20
30/2=15
Plain
40
40
3/1 LHT
16
12
Zigzag twill
22
22
Bedford cord
20
16
2/1 RHT
20
20+70D=16
Ottoman
16
10+10=5
Figure-1: Thread count chart of different types of woven fabric
Thread density
Thread density is the number of warp and weft threads per inch of woven fabric. Thread density is denoted by EPI and PPI. It is very important for GSM and cover factor. But the GSM and cover factor also depend on the thread count.

From the Table-2 and Figure-2; we have seen that the EPI is always greater than PPI. The highest EPI is 154 of Bedford cord and the lowest EPI is 100 of ottoman. Also we see that the highest PPI is 85 of Dobby and the lowest PPI is 48 of 2/1 RHT. In theoretically EPI must be greater than PPI. EPI is greater than PPI in our result. So all the results we have found in thread density comply with the theoretical concept.

Table 2: Thread density of different types of woven fabric
Sample
Thread density
EPI
PPI
Dobby
152
85
Boxy
108
56
Rib stop
110
72
Oxford
120
80
Plain
133
72
3/1 LHT
116
56
Zigzag twill
133
68
Bedford cord
154
80
2/1 RHT
120
48
Ottoman
100
49
Figure-2: Thread density chart of different types of woven fabric

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