Summary of "Introduction to Yarns / What Is A Yarn ? Difference Between Yarn And Thread"

Summary of “Introduction to Yarns / What Is A Yarn? Difference Between Yarn And Thread”

Main Ideas and Concepts

Definition of Yarn

Yarn is an assemblage of fibers twisted or laid together to form a continuous strand suitable for textile use. Yarns can be made from staple fibers, filaments, or a combination of both.

Definition of Thread

A thread is made by tightly twisting three or more yarns together. Threads are dyed and finished to fit into the eye of a needle or for hand knotting, crocheting, and similar uses.

Forms of Yarn

Yarns can take various forms, including:

Number of fibers twisted together.
Number of filaments laid together without twist (zero twist yarn).
Number of filaments laid together with a degree of twist.
Single filament with or without twist (monofilament).
Narrow strips of material (paper, plastic film, metal foil) with or without twist for textile use.

Yarn Formation

Filaments only need grouping (twisting) to achieve thickness.
Staple fibers require twisting to adhere and form a continuous yarn.
Twisting creates friction between fibers, enabling yarn strength and resistance to tension.
Yarn type influences fabric texture and appearance:
- Filament yarns: thin, smooth, lustrous.
- Staple fiber yarns: thicker, fibrous, non-lustrous.

Types of Yarns

Spun Yarn (Staple Spun Yarn)
- Made from short staple fibers such as cotton, wool, or manufactured fibers.
- Uneven, weaker yarn with poor luster and durability.
- Exhibits good elasticity, resiliency, and absorbency.
- Mainly used for apparel and furnishings.
Monofilament Yarn
- Single filament of synthetic fiber strong enough to be used alone.
- Fine, strong, with good luster and durability.
- Inelastic, poor resiliency, and absorbency.
- Primarily used for hosiery and invisible sewing thread.
Multifilament Yarn
- Made from two or more filaments of manufactured fiber.
- Even, strong yarn with good luster and durability.
- Medium elasticity and resiliency, slightly absorbent.
- Mainly used for evening wear and lingerie.

Methodology / Key Points

Yarn is formed by twisting fibers or filaments to create a continuous strand.
Staple fibers require twisting to stick together; filaments only need grouping.
Twisting increases friction and strength.
Yarn type affects fabric qualities such as texture, luster, elasticity, and absorbency.
Threads are composed of multiple yarns twisted together and finished for specific uses.
Different yarn types serve different textile purposes depending on their properties.