Yarn Numbering System
Yarn Numbering System
Yarn Numbering System
System
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. Therefore, the concept of yarn count has been introduced which specifies a
certain ratio of length to weight.
The fineness of the yarn is usually expressed in terms of its linear density or count. There are a
number of systems and units for expressing yarn fineness. But they are classified as follows .
N= (W×l) / L
Where,
N =Yarn count or numbering system
W =Weight of the sample at the official regain in the unit of the system
L=Length of the sample
l=Unit of length of the sample
In brief, definition of the above Systems is as follows:
1. Tex system ..........................NO. of grams per 1000 meters
2. Denier .................................No. of Grams per 9000 meters
3. Deci Tex ..............................No. of grams per 10,000 metres
4. Millitex ................................No. of milligrams per 1000 metres
5. Kilotex............................... .No. of kilograms per 1000 metres.
6. Jute count........................No. of lb per 14,400 yds
The Tex of a yarn indicates the weight in grammes of 1000 metres yarn. So
that 40Tex means 1000 meters of yarn weigh 40gm.
Where,
N =Yarn count or numbering system
W =Weight of the sample at the official regain in the unit of the system
L=Length of the sample
l=Unit of length of the sample
w = Unit of weight of the sample.
The Ne indicate show many hanks of 840 yards length weigh one English pound. So that 32 Ne
Means 32 hanks of 840yards i.e.32x840 yards length weigh one pound.
For the determination of the count of yarn, it is necessary to determine the weight of a known
length of the yarn. For taking out known lengths of yarns, a wrap-reel is used. The length of yarn
reeled off depends upon the count system used. One of the most important requirements for a
spinner is to maintain the average count and count variation within control.