1.6 Yarns and fabric properties/serviceability Flashcards
Effect Spun yarn
Increased hairiness and decreased lustre Fabrics feel fuller
Effect Filament yarn
Increased smoothness and lustre Fabrics feel compact
Effect Direction of yarn twist
Alternate groups of ”Z” and ”S” twist yarns in the warp give increased lustre
Effect Amount of twist
Increased twist gives increased strength and more compact yarns; pilling is reduced
Lower twist gives weaker yarns, but yarns with more fullness and softness
Too much twist gives weaker, dull and harder yarns which snarl easily
Effect Strength and elongation
Stronger yarns tend to produce stronger fabrics
Low elongation at break makes weaving difficult, but increases dimensional stability in garments
Effect Combed yarn
Increased strength, regularity of thickness and lustre, but increased cost
Effect Plied yarn
Increased strength and regularity, but increased cost
Effect Complex yarn: corespun
Properties of the component fibres utilised Elastomeric components can be disguised Increased strength
Effect Complex yarn: other novelty types
Different aesthetic (texture, hand) and visual ef- fects produced, but usually with decreased abrasion resistance and increased soiling and snagging
Effect Textured yarn: false-twist
Increased bulk (comfort improved) and extensibility
Effect Textured yarn: knife-edge
Increased extensibility
Effect Textured yarn: stuffer-box
Increased bulk (comfort improved)
Effect Textured yarn: air-jet
Increased fullness without extensibility
Effect Textured yarn: gear-crimped / knit-de-knit
Increased lustre, crêpe or crinkled appearance with little extensibility
Effect Textured yarn: bicomponent
Increased bulk (comfort improved)
