what is yarn | how to increase yarn strength | factors of yarn strength

According to textile institute yarn may be defined as a product of substantial length and relatively small cross-section consisting of fibers or filaments with or without twist.

Yarn is a continuous thread collected of any natural or man made fibers or filament and is used for weaving and knitting to produce a cloth or fabric. A yarn is defined as a product of large length and relatively small cross section consist of fibers and filaments with or without twist. the yarn also a elastic strength. if is has no elastic strength means it is not yarn. for example banana tree's fiber. it is not a yarn or thread because it has no elastic strength, tensile strength, or other properties of to be a yarn.

In general, may also be defined as linear assemblage of fibers or filaments formed into a continuous strand, having textile-like characteristics. The textile like characteristics referred to include good tensile strength and high flexibility. Many non textile materials can be designed to have similar strength and pliability in continuous strand form. To be considered a yarn, however, these strands must be process able on conventional textile equipment or must possess visual and tactile characteristics (aesthetics) that are usually associated with textile products.

Yarn may be composed of one or more continuous filaments or many non-continuous and rather short fibers (staple). To overcome fiber slippage and to be formed into a functional yarn, staple fibers are usually given a great amount of twist or entanglement. Yarns made from staple fiber are often referred to as spun yarns. Two or more single yarns can be twisted together to form ply or plied yarns. Plied yarns can be further twisted into various multiples. Combination yarns are plies of dissimilar components such as staple and continuous filament yarn.

FACTORS AFFECTING YARN STRENGTH:

The various factors that affect the strength of yarns are, among others:-

1)      Staple length (it is directly proportional to length).

2)      Uniformity in fiber length.

3)      Fiber length distribution.

4)      Maturity of fiber.

5)      Fiber fineness.

6)      Fiber strength.

7)      Yarn twist.

8)      Yarn evenness.

9)      Moisture.

10)  Yarn finish.

11)   Number of major beating points used during opening and cleaning.

12)   Number of drawing passages.

13)   Roller settings in spinning.

14)   Others.

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