How to identify different types of yarns

How to identify different types of yarns

1. IDENTIFICATION OF TYPES
OF YARN

4. S-TWIST AND Z-TWIST
S-TWIST z-TWIST
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6. •Twistareoftwotypes:-
1-S-twist–Directionoftwistfollowthecenterbarof
letter‘S’.Alsoknownaslefttwist.
2-Z-twist–Directionoftwistfollowthecenterbarof
letter‘Z’.Alsoknownasrighttwist.
•Mostyarnsaremadefromthistwistonly.
•Z-twistedyarnsaremoretightlytwistedthanS-
twistedyarn.
(17)

8. Simple
yarn
Single yarn
(Product of
first twisting
operation)
Ply yarn
(Product of
second twisting
operation)
Cord
(Product of
third twisting
operation)
(10)

11. NOVELTY YARN
Madefortheirappearancevalue.
•Irregular in size, twist and effect.
Hasthreebasicparts-
1.Thegroundorfoundation
2.Thefancyoreffect
3.Thebinder
Thatarelooseandbulkygivecreaseresistanceto
fabric.
Addinteresttoplainweavefabric.
Ifusedinonedirection,usuallyinfilling
direction.
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23. RatineYarn
Knot Yarn
(13)

30. •The degree of twist affect-
Its fineness
Its strength
Shed soil easily
Its elasticity
Its abrasion resistance
Appearance of fabric
(18)

31. On the basis of
amount of twist
Low twist
Average
twist
High hard
twist
Crepe twist
(19)

32. Amount of
twist
Low twist
(6-8 tpi)
Average
twist
(20 tpi)
High hard
twist
(30-40
tpi)
Crepe
twist
(40-80
tpi)
(20)

33. •Determinedurabilityandserviceabilityoffabric.
•Fineyarnrequiremoretwistthancoarseyarns.
•Warpyarnrequiremoretwistthanfillingyarn.
•Knittingyarnhavelesstwistthanfillingyarn.
•Shortfiberrequiremoretwistthanlongand
filamentfiber.
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34. On the basis of special
use
•Some special used yarns are:-
1-Sewing thread
2-Embroidery thread
(25)

35. 3-Textured yarns
4-knitting yarn
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36. DIFFERENCE BETWEEN
THREAD
AND YARN
YARN
Used to construct a
fabric.
Yarn is an
assemblage.
Yarn may not be a
thread.
Yarn may not be so
constructed.
THREAD
Used to join piece
of fabric.
Thread is always a
product.
Thread is always a
yarn.
Thread must be so
constructed.
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