fiber to yarn denier & tex System

1. TEXTILE SCIENCE

2. TOPICS –
Yarn Count
Denier System
Tex System

3. YARN COUNT
• Yarn count, simply said, is a measure of the fineness of a yarn.
• It gives an estimation of how thick or thin a yarn is.
• We can also measure the diameter of the yarn and express it in
inches etc.
• The yarn is not exactly circular in cross section.
• Also most yarn are soft and compressible and hence the
moment we apply some scale etc., it gets deflated.
• Textile yarns are measured in various units, such as: the denier
and tex (linear mass density of fibres), Super S (fineness of
wool fiber), Worsted count, Woolen count, Cotton count (or
Number English Ne), Number metric (Nm) and Yield (the
inverse of denier and tex).

4. • According to Textile Institute, Count a number indicating the
mass per unit length or the length per unit mass of yarn.
• Yarn count can be described into two systems:
1. Direct system or fixed weight.
2. Indirect system or fixed length.
• Direct System - The yarn number or count is the mass of unit
length of yarn. Higher the count coarser the yarn. This system
is commonly used for man-made fiber, jute, silk etc.
*
• Indirect System - In indirect yarn counting system the count or
number is the length per unit mass of the yarn. Higher the
count finer the yarn. This system is commonly used for
cotton, worsted, linen etc.
*

5. *N= The Yarn Count,
W= The weight of the sample at the official regain in the units
of the system
w= the unit weight of the system
L= the length of the system
l= the unit length of the system,

6. DENIER SYSTEM
 Denier or den is a unit of measure for the linear mass density of fibers.
 It is defined as the mass in grams per 9000 meters.
 The term Microdenier is used to describe filaments that weigh less than one
gram per 9000 meters.
 The following relationship applies to straight, uniform filaments:
*DPF = total denier / quantity of uniform filaments
*DPF ( Denier Per Filament)
 The denier system of measurement is used on two- and single-filament
fibers.
 One can calculate the diameter of a filament yarn using denier with the
following formula –
where density in grams per cubic centimeter and the diameter is in mm.

7. TEX SYSTEM
 Tex is a unit of measure for the linear mass density of fibers and is defined as the mass in
grams per 1000 meters.
 When measuring objects that consist of multiple fibers the term "filament tex" is sometimes
used, referring to the mass in grams per 1000 meters of a single filament.
 Tex is used for measuring fiber size in many products, including cigarette filters, optical cable,
yarn, and fabric.
Thread made from two threads

8.  One can calculate the diameter of a filament yarn using tex with the following formula –
where density in grams per cubic centimeter and the diameter is in mm.
Tex (g/km) Yield (yards/lb)
550 900
735 675
1100 450
1200 413
2000 250
2200 225
2400 207
4400 113

9. THAN
K