This document discusses different yarn counting systems and yarn modification. It describes three main yarn counting systems: direct, indirect, and universal/tex. The direct system measures weight per unit length, indirect measures length per unit weight, and tex is a direct system applicable to natural and synthetic yarns. It also outlines various yarn modification techniques like texturizing and novelty yarns which are made for appearance and include slub, fleck, spiral and boucle yarns.
Knowing the basics of raw material, yarn production process and the other factors influencing quality will put the sourcing manager at the same eye level as a spinner /supplier when negotiating quality issues.
As a consequence this puts the sourcing manager in the position to pay the right price for the corresponding quality level.
This kind of know-how supports a retailer enormously in his efforts to establish a reliable supply chain which is based on mutual understanding.
The chief function of roving frame is the attenuation of sliver.
To draft the sliver to reduce weight per unit length.
Insertion of protective twist in order to hold the fine strand of sliver.
To make conical or tapper shape of the bobbin.
Wind the twisted roving on to the bobbin.
Winding of roving into a package that can be transported, sorted, donned on ring spinning machine.
Drawframe is one of the important machines in yarn spinning line. It is prepared for combining and drawing slivers and removing card irregularities of textile fibres.
Hairiness is characterized by the quantity of freely moving fibre ends or fibre loops projecting from a yarn or textile fabric (woven, knitted or non woven fabrics).
In term of measurement Hairiness corresponds to the total length of the protruding fibres in unit length of one centimeter.
Knowing the basics of raw material, yarn production process and the other factors influencing quality will put the sourcing manager at the same eye level as a spinner /supplier when negotiating quality issues.
As a consequence this puts the sourcing manager in the position to pay the right price for the corresponding quality level.
This kind of know-how supports a retailer enormously in his efforts to establish a reliable supply chain which is based on mutual understanding.
The chief function of roving frame is the attenuation of sliver.
To draft the sliver to reduce weight per unit length.
Insertion of protective twist in order to hold the fine strand of sliver.
To make conical or tapper shape of the bobbin.
Wind the twisted roving on to the bobbin.
Winding of roving into a package that can be transported, sorted, donned on ring spinning machine.
Drawframe is one of the important machines in yarn spinning line. It is prepared for combining and drawing slivers and removing card irregularities of textile fibres.
Hairiness is characterized by the quantity of freely moving fibre ends or fibre loops projecting from a yarn or textile fabric (woven, knitted or non woven fabrics).
In term of measurement Hairiness corresponds to the total length of the protruding fibres in unit length of one centimeter.
Absorbent cotton wool OR Surgical cotton roll and related products manufacturing machine
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3. YARN COUNT/YARN SIZE/ YARNYARN COUNT/YARN SIZE/ YARN
NUMBERNUMBER
It can also be called Yarn number or Linear
Density.
The count of a yarn is a
numerical expression which
defines its Fineness
4. The different systems of expressing the yarn
number are:
Theses systems depends on the material used for
preparing the yarn are
1. DIRECT SYSTEM
2. UNIVERSAL SYSTEM OR TEX SYSTEM
3. INDIRECT SYSTEM
1. DIRECT SYSTEM
2. UNIVERSAL SYSTEM OR TEX SYSTEM
3. INDIRECT SYSTEM
5. DIRECT SYSTEM =
INDIRECT SYSTEM =
weight per unit of length of yarn
length per unit of weight of yarn
6. DIRECT SYSTEM (Denier)DIRECT SYSTEM (Denier)
The denier of the yarn is the number of
unit of weight per unit of length.
The unit of length remains constant.
This system is used for silk, jute and manmade
fibers.
The smaller the number, finer the yarn.
Denier =
Weight in Grams
Length in 9000 m
7. UNIVERSAL SYSTEM (Tex)UNIVERSAL SYSTEM (Tex)
Tex system can be used from fiber to yarn stage.
This is a direct system of yarn numbering.
It is applicable to both natural and synthetic yarns.
Tex is defined as the weight of the yarn in grams
present in 1000 m or 1 km length.
Tex= Weight in
Grams
Length in 1000 m or 1
km
Tex= Weight in
Grams
Length in 1000 m or 1
km
8.
9. INDIRECT SYSTEM (Count)INDIRECT SYSTEM (Count)
• Count is the number of units of length per unit of
weight of yarn.
• The unit of weight remains constant.
• It is used for cotton, wool, worsted yarns and linen
etc.
• The lower the count ,the coarser the yarn.
• This system is also referred as Cotton system.
• The count of the yarn is defined as number of hanks to
a pound.
10. INDIRECT SYSTEMINDIRECT SYSTEM
Cotton count
Wool count
Worsted count
Metric count
Several indirect systems are used in practice
depending on the type of yarn produced, and the
spinning system.
11. Cotton CountCotton Count
• For cotton yarns, the “English” or “cotton”
count is used to express yarn fineness.
• The unit of length in an “English” count
system is the hank, 840 yd, and the unit of
weight is 1 lb.
No. of (840 yards) / 1 pound
12.
13.
14. An example of Indirect SystemAn example of Indirect System
• If 40 Hanks each containing 840 yards of the yarn
weigh 1 lb, then the yarn count is 40 and will be
expressed as “40s” where ‘s’ stands for singles.
• If yarns of different count are twisted each count
is mentioned, as for e.g. 20/30s indicates twisting
together of a single 20s yarn and single 30s yarn.
15.
16. Woolen /Worsted CountWoolen /Worsted Count
For wool yarns, two indirect systems are
commonly used:
(i) the Woolen system, and
(ii) the Worsted system.
• In the Woolen system, the unit length (or the
hank) is 256 yards, and the unit of weight is
pound.
• In the Worsted system, the unit length (or the
hank) is 560 yards, and the unit of weight is
pound.
17. Metric SystemMetric System
"Metric" system is commonly used in
Europe.
In this system, the unit length is
kilometer, and the unit of mass is kg.
18.
19. System Formula
Direct: weight per unit of length of yarn
Denier Weight in Grams/9000 m length
Tex Weight in Grams/1000 m length
Indirect: length per unit of weight of yarn
Cotton Count No. unit length (840 yards) / 1 pound
Wool Count No. unit length (256 yards) / 1 pound
Worsted Count No. unit length (560 yards) / 1 pound
Metric count No. unit length (1 km) / 1 kg
25. Fabric Constants
Single jersey y = -3.3465x + 256.56
Single jersey lycra y = -6.6089x + 407.04
Single lacoste y = -5.695x + 340.59
Double lacoste y = -15x + 580
11 Rib y = -4.496x + 342.35
22 Rib y = 6140.4x – 171676
Interlock y = -4.3074x + 368.78
Equations at a glance
27. Yarn processing is the first series of operation
The steps varies for different fibers
In making fiber into yarns there are two types of
processes –
1- General process- Common to many yarns.
2- Texturizing process- To obtain special textured
effect,extra bulk,stretch
or a combination of all.
(5)
Processing of
yarns
28. 2. Texturizing process imparts-
a). a permanent loop, curl or crimp to individual
filament
b). more opaque
c). have a different appearance or feel
warmth
d). more absorbent
e). non-pilling quality
f). greater durability
g). moisture absorbent
33. Single yarn
(Product of
first twisting
operation)
Ply yarn
(Product of
second twisting
operation)
Cord
(Product of
third twisting
operation)
(10)
34. 2. Novelty yarn – Made for their appearance
value.
• Irregular in size, twist and effect.
Has three basic parts-
1. The ground or foundation
2. The fancy or effect
3. The binder
That are loose and bulky give crease resistance to
fabric.
Add interest to plain weave fabric.
If used in one direction, usually in filling
direction.
(11)
35. Different type of novelty yarns:-
1-Slub Yarn
-
2- Flock Yarn
3-Spiral Yarn
(12)
39. 39
SLUB YARNSLUB YARN
A slub yarn is one in which slubs have been
deliberately created to produce the desired
discontinuity of effect.
Slubs are thick places in the yarn.
40. 40
FLECK YARNFLECK YARN
Small amounts of fibres of either different
colours or lustre or both are introduced into
the yarn.
This gives it a spotted and short streaky
appearance
41. 41
SNARL YARNSNARL YARN
It is same as loop yarns except that the
looping yarn has high twist so that the
Loop turns into a snarl
42. 42
LOOP YARNLOOP YARN
A loop yarn consists of a core with an effect
yarn wrapped around it
and overfed so as to produce almost circular
projections on its surface.
As a general rule, four yarns are involved, of
which two form the core or ‘ground’ yarns.
43. 43
BOUCLE YARNBOUCLE YARN
This is a compound yarn comprising a twisted
core with an effect yarn combined with it so
as to produce wavy projections on its surface.
44. 44
A spiral or corkscrew yarn is a plied yarn that
displays a characteristic smooth spiraling of
one component around the other.
it can be produced relatively simply on a
doubling frame or under the ring spinning
system.