Types of yarns

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  • Created by: Steff06
  • Created on: 07-06-16 19:46
What is core-spinning?
Filament core and staple sheath twisted around the core.
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What is sheathing?
Elastane core wrapped with twisted filament yarns.
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What is interlacing?
Multi-filaments are blown with a hot air jet which causes them to intermingle and bond together.
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What are the 4 fancy yarns
Slub yarns, boucle yarns, chenille yarns and metallic yarns.
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Describe slub yarns
Yarn spun with slubs intentionally to create fabric with more personality.
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What are boucle yarns?
A curled or looped yarn on fabric giving a thick, knobbly effect.
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Describe chenille yarns
A fuzzy yarn with fibres protruding from it. Piles wrapped around the core.
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What are metallic yarns?
Lurex - made of aluminium laminated foil and transparent film sliced into narrow strips.
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What are metallic fibres?
Composed of metal, plastic coated metal/entirely composed of metal.
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What are folded/plied yarns composed of?
Two or more single yarns twisted together.
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Why do we make folded/plied yarns?
To improve strength, achieve special effects, make heavier structures.
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What is balanced twist?
When the folding twist is approximately equal and opposite of the singles.
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Describe cabled yarns
2 or more folded yarns may be twisted together to form a cabled yarn.
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Describe how colour effects can be achieved on yarns
Mixing different colours during spinning produces Ingrain yarns. Melange are spun from combed silver or top printed with stripes.
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How are the coloured Marl yarns made?
By spinning from 2 colours.
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Describe structure effects
Slub yarns are single or folded yarns with long thick places. Spinning or folding creates slub effect.
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How are Bouclé/loop yarns made?
By a special folding process resulting in looped projections.
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How are the structure effects on chenille made?
By cutting special fabrics into strips.
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How are structure effects on crepe yarns made?
Made from highly twisted yarns.
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How are lustre effects created?
By mixing matt and bright colours or the use of metal fibres.
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Why do we add texture to yarns?
To increase warmth, absorbency, improve appearance and reduce pilling.
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Describe how we can bulk yarns
Create more air spaces by crimping, curling or coiling.
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Describe the false twist method to make yarns bulkier
The filament yarn is twisted and set and then untwisted and heated again.
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Describe the knit-de-knit process
Synthetic yarn is knitted, heat is then applied. Sets the loops and yarn is unravelled and lightly twisted.
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How can bulk be introduced chemically?
By combining filaments of both high and low shrinkage then subjecting the yarn to washing or steaming.
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What is air bulking?
Subjected to a high-pressure jet of air, blowing individual filaments into loops that separate.
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Describe the production of stretch yarns?
Continuous filament yarns that are tightly twisted, heat set and then untwisted producing a crimp that springs.
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Other cards in this set

Card 2


What is sheathing?


Elastane core wrapped with twisted filament yarns.

Card 3


What is interlacing?


Preview of the front of card 3

Card 4


What are the 4 fancy yarns


Preview of the front of card 4

Card 5


Describe slub yarns


Preview of the front of card 5
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