Yarn Definition | Types Of Yarn | Classification Of yarns | Sewing Thread Type| Fancy Yarns|Garmentsguruji

Definition  Yarn is constructed assemblage of textile fibres which act as a unit in fabric formation.
Classification Of Yarn:Stable(or)FilamentSingle(or)pliedSimple(or)ComplexTypes of YarnCore spun Yarn
 A yarn in which a base yarn is completely one or more effect yarns
Fancy Yarns Boucle, Grimp and Loop Yarns These Yarns are made by feeding one or more effect yarns


1)Boucle:-
bouncle Yarns are buble suface is defect
2)Gimp:-
 Gimp is far an equivalent as boucle, but the surplus yarn forms a more regular surface
3)Loop:-
 Loop yarn is that the results of the surplus soft small stuff being formed into well-shaped circular loops on the hard spun core.
4)Snarl Yarns:-
Snarl yarns are made during a similar thanks to loop yarnsExcept the effect yarn has a high, lively twist so that the excess bits snarl and double upon themselves and twist together.Just like the lengths of cord we make on a doorknob5)Knob Yarn:-
These yarns also are made by feeding the yarns at different rates while spinningbut this point the surplus yarn of 1 or more of the components forms bunches These can be at regular or irregular interval6)Slub Yarn:-
Slub Yarn is characterized by having, alternating short places of thin, firm twist yarns, with places of very thick, loose twist yarnsThe different areas can be at regular intervals.7)Marl Yarns:-
Marl Yarns are made by twisting together two or more ends of various coloured yarns.The Effect Pattern is one of the regular diagonal stripes of each colour.8)Spiral Yarn
These are plied yarns where one yarn wraps round the other, instead of the yarns being twisted togetherA spiral yarn features a higher twist than a corkscrew yarnA spiral yarn usually has a thinner yarn wrapped around a thicker coreA corkscrew yarn has a softer bulkier yarn wrapped around a thin, firm yarn.9)Chenille Yarns:-
Chenille yarns have a soft, fuzzy cut pile which is sure to a core.These yarns are often spun, but the machinery required is extremely specialised.The warp is then cut halfway between each weft thread.10)Ribbon:-
These yarns are not produced by spinning.The ribbons are usually soft, shiny and silky.11)Folded or Doubled Yarn:-
These yarns has two or more single ends twisted together.The yarns are twisted in a single operation.They are referred to as two-fold, three-fold, etc.12)Cabled Yarns:-
Tow are more already folded yarns are twisted together.Novelty Yarns:-
These are yarns that different from normal yarns, in appearance, texture and handle.They constitute a huge range of types, many specifically designed for hand knittersNovelty yarns can be further split into two categories, fancy and metallic.Fancy Yarns:-
Fancy yarns are often made up of staple or filament fibres.They are intentionally produced to possess a distorted or irregular constructionpopular effects include knops, snarls, loops and slubs.Metallic Yarns:
Usually produced from aluminium sheets laminated with film , dig thin ribbons or are often core spun, for instance , a polyester core with a metallic outer.Sewing Thread:- Sewing Threads form efficient stitches without breaking or becoming distorted during the useful lifetime of the merchandise . The basic function of a thread is to deliver aesthetics and performance in stitches and seams.


Factors affecting the functions of sewing thread:
 Colour, lustre and fineness thickness should be considered while selecting a thread for decorative purposes such as topstitching or embroidery.


Other Considerations include:-
Shade MatchingColour fastnessStitch SelectionUniformity of stitch formationDifferent types of sewing threads
 Usually, sewing threads are manufactured from either natural or manmade fibres in either staple or filaments forms, Aboard classification of different types of sewing threads is given below






Sewing Thread






Properties of Sewing thread:
 1. Needle thread must pass freely through the tiny eye of the needle, consequently, they need to be uniform, knot-free, non-torque and fault free.
 2. Tensile strength/breaking strength is one among the essential properties of the thread. The strength of the stitching thread must be above that of the material in order that the thread doesn’t rupture during use.
 3. The elasticity of the sewing thread must be uniform along its length in order to enable equal length stitches to be formed, and it most closely matches the elasticity of the fabric being sewn.
 4. The forces that are developed in the sewing thread are mostly due to the friction between the thread and machine parts, the most severe action taking place between.


The thread and the needle.
The thread and the fabric being sewn.


 5. Good abrasion resistance is essential for good sewing performance. nylon and polyester offer the simplest resistance to abrasion.
 6. Good resistance to heat is a very important requirement of a sewing thread. The temperature reached by the stitching needle during sewing considerably depends on:


 The nature of the material to be sewn(Density, thickness, finish)
 The speed of the sewing machine
 The type of needle used(Size, shape, surface, finish)
 
 7. The hairiness of the sewing thread also affects the appearance to the seam.
 8. the ultimate direction of twist insertion could also be important to enable the stitch forming mechanism of the stitching machine to perform correctly, most stitching machines required Z twist, but there are a couple of where performance is best with S twist.
 9. Colour fastness is a general requirement for sewing thread. It is important that the selected shade retains its colour throughout the life of the garment. two aspects of fastness are important.

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