Yarn count system and test methods

 

What is yarn count?

Yarn count is a number which indicates the mass per unit length or the length per unit mass of yarn.

Classification

Generally, there are four representation ways of yarn count: Tex, Denier, Ne and Nm. Tex and denier belongs to the mass per unit length system, and Ne and Nm belong to per unit mass of length system.

Calculating methods of yarn count
​

Tex: The yarn count in the Tex system is the weight in grams of 1000m of yarn. Tex is usually used to express the count of natural material yarn. It is decimal and employs metric units.
Ttex=(m/L)*1000
Where,
m = The weight of the sample, g
L = The length of the sample, m
Denier: The count of yarn in the denier system is the weight in grams of 9000m of yarn. Denier is usually used to express the count of chemical fibers and filament.
Td=(m/L)*9000
Where,
m = The weight of the sample, g
L = The length of the sample, m
In the mass per unit length system, the yarn count is the number of “units of weight” per “unit of length” of yarn. This means the higher the yarn count, the thicker the yarn. It is based on the fixed length system.
Ne: Ne is the number of hanks (840yarns) of pound weight yarn. Ne is usually used to express the count of cotton type yarn in SI system.
N e=L/(840m)
Where,
m = The weight of the sample, lb
L = The length of the sample, yd
Nm: Nm is the length of per gram yarn, and it is usually used to express the count of wool yarn, linen yarn and natural fibers.
N m=L/m
Where,
L = The length of the sample, m
m = The weight of the sample, g

Conversion relationships between Tex, Denier, Ne and Nm

Ne=590.5/Ttex
Ne=0.5905Nm or Nm=1.6931 Ne
Ttex=1000/Nm
Ttex=Td/9
Click here to find more about yarn count test methods.

Comments

Post a Comment

Popular posts from this blog

Combing Process in Spinning

Image
Before processing cotton, wool, and silk fibers into fabrics, the process of removing impurities and short fibers in the fibers with a combing machine is called combing. The texture, washability and durability of the fabric produced through this process are greatly improved compared with carded fabrics. The following introduces the composition of the combing machine and the combing process. The kinematic coordination relationship of the main parts on the combing machine is indicated by a dial. The disc is mounted on the combing machine and rotates synchronously with the cylinder, which is generally called the indexing disc. The index plate is divided into 40 equal parts along the circumference, and each equal part is 9°, which becomes one index. The working cycle refers to the time interval between the combing cylinder of the intermittent combing machine corresponding to the two actions of combing the whiskers. That is: the first row of needles in the combing cylinder goes to the botto
Read more

Twist Test Methods and Influencing Factors

Image
  Twist test is an important part of yarn inspection. It is related to the strength, elongation, appearance, style, etc. of yarns and fabrics. Different yarns have different structural characteristics, and their twist testing methods are also different. Basic concept To understand twist testing, you must first understand what twisting is. Twisting is a necessary condition for yarn formation. Short fibers can be made into yarns with certain physical and mechanical properties through twisting; filaments often need to be twisted in order to increase the tightness between single filaments, facilitate processing, and improve fabric properties. Number of twists Twisting is to cause two cross-sections of parallel straight fiber slivers to rotate relative to each other. The number of relative rotations of the two cross-sections is called the number of twists. Twist Twist refers to the number of twists per unit length of yarn . Twist coefficient In actual production, the twist coefficient is of
Read more

Garment Dyeing-Special Dyeing Method In Textile

Image
Garment dyeing is a relatively special dyeing process for textiles and garments. Many people may not know much about this dyeing process. In the impression of most people, textile and clothing products are dyed in the fabric period, and garment dyeing is a dyeing process that breaks people’s cognitive limitations on textile dyeing. ​What is garment dyeing ​Garment dyeing means that dyeing the one not in the fabric type but in the garment type itself. The garment type mentioned above include socks, towels, sportswear, shirts, plush toys (without fillers), T-shirts, pants, bathrobes, handkerchiefs, bath mats, carpets, scarves, etc. The material of these garments can be wool, linen, silk and cotton of natural fibers. But most garments are made of cotton or a cotton-rich blends. Garment dyeing imparts vibrant colors to garments. The clothes such as denim garments, tops, sportswear and casual clothing with garment dyeing can provide a distinctive special effect. Garment dyeing method Garmen
Read more