1. -By Mangesh Tonde and Sachin Nagare
Post visit presentation on Veermata Jijabai
Technological Institute, Mumbai
Post visit presentation on Veermata
Jijabai Technological Institute, Mumbai 01/08/13 1
2. Definition
Count: According to the Textile Institute “Count is a
number of indicating the mass per unit length or length
per unit mass of yarn”.
Yarn Count: is defined as the weight per unit length of
the yarn or the length per unit weight.
Post visit presentation on Veermata
Jijabai Technological Institute, Mumbai 01/08/13 2
3. There are several count system of yarn. These
count systems have been divided in two ways. One is
Direct System where length is fixed and another is
Indirect system where weight is fixed.
Direct System
Indirect system
Post visit presentation on Veermata
Jijabai Technological Institute, Mumbai 01/08/13 3
4. The weight of a fixed length of yarn is determined. The
weight per unit length is the yarn count.
The following formula is used to calculate Direct count:
N= (W×l) / L
Where,
N =Yarn count, W =Weight of the sample, L=Length of
the sample
l=Unit of length of the sample
Post visit presentation on Veermata
Jijabai Technological Institute, Mumbai 01/08/13 4
6. The length of a fixed weight of yarn is measured. The
length per unit weight is the yarn count.
The following formula is used to calculate Indirect count:
N = (L×w) / W×l
Where,
N =Yarn count, W =Weight of the sample, L=Length of the
sample
l=Unit of length of the sample
w = Unit of weight of the sample.
Post visit presentation on Veermata
Jijabai Technological Institute, Mumbai 01/08/13 6
8. -By Mangesh Tonde and Sachin Nagare
Post visit presentation on Veermata Jijabai
Technological Institute, Mumbai
Post visit presentation on Veermata
Jijabai Technological Institute, Mumbai 01/08/13 8
9. The amount of twist is an important factor.
It determines the appearance as well as the durability
and serviceability of a resulting fabric
Fine yarns require more twist than coarse yarns.
Warp yarns, which are used for the lengthwise
threads in woven fabrics, are given more twist than are
filling yarns, which are used for the crosswise threads.
Post visit presentation on Veermata
Jijabai Technological Institute, Mumbai 01/08/13 9
10. To retain the twist in the yarns and prevent any tendency
to untwist or kink, the yarns are given a twist-setting
finish with heat or moisture
The direction of twist may be observed by holding the
yarn in a vertical position. If the spirals conform to the
direction of the slope of the central part of the letter S,
the yarn has an S twist; if they conform to the slope of
the letter Z, the yarn has a Z twist.
Post visit presentation on Veermata
Jijabai Technological Institute, Mumbai 01/08/13 10
12. The physical properties such
as smoothness comes over
yarn after twisting and
removes loose filaments also
Post visit presentation on Veermata
Jijabai Technological Institute, Mumbai 01/08/13 12
14. The number of twists per inch can, in PILED yarns, be
determined by counting the number of bumps in one
inch, and divide by the number of singles
for example, In this yarn the number
of twists per inch would be 6 divided
by 2 that is 3
Post visit presentation on Veermata
Jijabai Technological Institute, Mumbai 01/08/13 14
15. The term count variation is generally used to express
variation in the weight of a lea and this is expressed as
C.V.%.
The number of samples and the length being considered
for count checking affects this
Post visit presentation on Veermata
Jijabai Technological Institute, Mumbai 01/08/13 15
16. THANK YOU.
Post visit presentation on Veermata
Jijabai Technological Institute, Mumbai 01/08/13 16
