ABSTRACT
Fibers are the fundamental units of the yarn structure. Such yarns are then served as founder units for a fabric structure produced by either weaving or knitting techniques. The basic classification of yarn is thereby done as per its use in fabric manufacturing. The second largest method of classification adopted deals with the origin of fiber. Until the turn of 20th century, all the fibers were obtained from natural resources but later on due to increased demands and scarcity of natural resources, manmade fibers were developed. These yarns based on the technology of their manufacturing were classified as synthetic or regenerated multifilament yarn. Blended or doubled (ply) yarns were introduced for compensating the limitations of natural fiber yarns in one or other way round to meet basic needs of end use application. Simultaneously to compete on economical front various unconventional spinning techniques were introduced in the market and given one more tag for the recognition of the yarn; rotor spun, air jet spun, etc. Thus wide varieties of yarn are available till date in terms of material, structure and production technology.
