YARN COUNT AND THICKNESS TESTING:-
Yarn count and thickness testing :-
TEX SYSTEM:- It is generally used to express the fineness of continuous filament yarn . The weight in grammes of 1000 meters of yarn is called the TEX (count) . When the count of yarn increases it becomes coarser. It is very easy to calculate the tex of yarn. First of all the 1000 mts of yarn length is taken from the yarn package, then the weight of this 1000 mts yarn is weighed on a micro weighing scale (balance) . The weight of this length in grammes will be the Tex (count) of yarn.
Some other version of the Tex system are given below:-
INDIRECT SYSTEM:-
New Metric count(Nm):-
LINEN COUNT (LEA):-
Woollen count (Dews bury) :-
Note:- To test the count of any yarn, the above method of finding yarn count can be used as explained above.
For yarn count and thickness testing it is very essential to know about the system of finding count for each quality of yarn. The detail explanation of numbering of any yarn are follows as under.
Yarn count ,(fineness of yarn ) and Various System of yarn count as under.
The fineness of yarn is known is known as COUNT. The fineness of yarn is also known as linear density of the yarn . The weight for length unit or length per unit weight is called the count of yarn. The count of yarn is expressed in the form of a numerical numbers. Diffrent systems are used in the different region of the world to express the count of the yarn (linear density of yarn). All system follow the principles given below.
There are two major system of numbering (count) the yarn are (1) Direct System. (2) Indirect system.
(1) Direct system:-
In this system of yarn count the length of yarn remains constant and the weight of yarn varies according to fineness of yarn. As the number (count) of yarn increase it becomes coarser. Following are the count system being used today in the textile industries.
DENIER system:- This system is most commonly used to express the count of a continuous filament yarn or man-made or re-generated fiebers . The weight of 9000 meters of yarn is called Denier of a yarn. The yarn becomes coarser as the denier of a yarn increases. It is very simple to find out denier of any yarn.
If there is a bigger yarn package , the yarn can be measured 9000 matres of length with help of wrap reel . Now this 9000 mts yarn is weighed with the help of a micro weighing scale. Thus the weight of this length of yarn in grammes will be the denier(,count) of the yarn.
If the yarn is very short length, then taken an available length of yarn. Next the weight in grammes is taken. Put them value in the formula as below,
If we have a short length of the yarn. It is to measured the yarn length and found its weight in grammes. Now both the values in the below given formula,
DECITEX SYSTEM:- Weight in grammes of 1000 meters of yarn is called DECITEX of yarn.
MILI TEX SYSTEM:- Weight in miligrams of 1000 meters of yarn is called militex of yarn.
KILOTEX SYSTEM:- Weight in a kilograms of 1000 meters of yarn is called KILOTEX of a yarn.
Lbs Count (Jute Count):- The weight in pounds (lbs) of 14400 yards of yarn is called jute count (lbs) of a yarn. It is used to express the fineness (count,) of jute yarn. The coarsenrss of yarn increase when lbs increases . Since it is not possible to measure to a yarn length 14400 yards with the help of a wrap reel then any possible length of the yarn is taken from the yarn package. Its weights is obtained with the help of micro weighing scale (Balance) on grammes. Lbs Count is found as follows,
In this system of yarn count , the Weight of yarn remains contant and the length of yarn varies according to the fineness of the yarn. As the number (count,) of the yarn increases the yarn becomes finer . Following system of indirect system are being used today in different textile industry.
NEW ENGLISH COUNT (Ne):-
The number of hanks (skein) of 840 yards in pound is called the New English Count (Ne) . Since this system is generally used to express the fineness of cotton count also. When the count of yarn increases , the yarn becomes finer . Th New English Count is calculated is as follows;
Suppose the length of a yarn is L meter , the weight of yarn is W grammes
The length of yarn in meters of one gramme of yarn or, length of yarn in kilometre of one kilogram of yarn is called new metric count,(Nm). The yarn becomes finer when Nm increases. It is generally used to express the count of cotton and sometimes for flax yarn. Nm of yarn is found by following the below method.
It is very simple to find out the Nm of any yarn . First of all take a suitable length of yarn measure it's length in meter and find its wright in grammes. Now put both the values in the below given formula;
The number of hank of 300 yards in a pound is called linen count (lea). It is specially used to express, the fineness of flax(linen) yarn , the yarn becomes finer when the count increased in this system.
If the weight of yarn is W grammes and the length of yarn is L meters, then the count of yarn is obtained as follows,
Worsted count:-
The number of hanks of 560 yards in one pound of yarn is called worsted count. It is used to express the fineness of the worsted yarn . The fineness of yarn increases when yarn count increases in this system.
The worsted count of yarn is calculated as follows,
Suppose that the weight of yarn is W grammes the length of yarn is L metres.
Woollen count (YSW):-
The number of hank of 256 yards is one pound of yarn is called woollen count (YSW). As the system name indicates, it is used to express the count of woollen yarn. The fineness of yarn increases when yarn count increases in this system . The yarn contributes is calculated as follows .
Suppose that the length of yarn is L meters and the wright of yarn is W gms.
The number of yarn in one ounce (oz) of yarn is called woollen count (Dews bury) . It is used to express the count of woollen yarn. The fineness of yarn increases when yarn count increases in this system.
Suppose that the length of yarn is L metres and the weight of yarn is W gms.
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