Classification of yarn according to their structure :
Staple fibre yarns or Spun yarns (Single yarn) : Spun yarns are made by mechanical assembly and twisting together (spinning) of staple fibres. Ring spinning, Rotor spinning, Warp spinning, Air-jet spinning etc. machines are used to produce this spun or single yarns
Ply yarn : Single yarn are used in the majority of fabrics for normal textile and clothing applications, but in order to obtain special yarn features, particularly high strength and modulus for technical and industrial applications, ply yarns are often needed. A folded or ply yarn is produced by twisting two or more single yarns together in a operation, and a cabled yarn is formed by twisting together two or more folded yarns or a combination of folded and single yarns. The twisting together of several single yarns increases the tenacity of the yarn by improving the binding-in of the fibres on the outer layers of the component single yarns. Ply yarns are also more regular, smoother and more hard weaving. The direction of twisting is designated as S or Z, just as in single yarns. Normally the folding twist is in the opposite direction to that of the single yarns.
Filament yarn : A filament yarn is made from one or more continuous strands called filaments where each component filament runs the whole length of the yarn. Those yarns composed of one filament are called monofilament yarns, and those containing more filaments are known as multifilaments yarns. For apparel application, a multifilament yarn may contain as few as two or three filaments or as many as 50 filaments. In carpeting, for example, a filament yarn could consist of hundreds of filaments. Most manufactured fibres have been produced in the form of a filament yarn. Silk is the only major natural filament yarn.
Classification of yarn according to their use :
Weaving Yarns : Yarns for woven cloth are prepared for the intended end use. Yarns to be used in the warp, the lengthwise direction of a cloth, are generally stronger, have a tighter twist, and are smoother and more even than are yarns used for filling, the crosswise direction of a cloth. Novelty yarns may be used in the warp, but they are generally found in the filling. Highly twisted crepe yarns are usually found used as filling yarns.
Knitting Yarns : These may be divided into yarns for hand knitting and yarns for machine knitting. Knitting yarns are more slackly twisted than yarns for weaving. Hand knitting yarns are generally ply, whereas those for machine knitting can be either single or ply.
Classification of yarn according to their manufacturing process :
Staple fibre yarns or Spun yarns (Single yarn) : Spun yarns are made by mechanical assembly and twisting together (spinning) of staple fibres. Ring spinning, Rotor spinning, Warp spinning, Air-jet spinning etc. machines are used to produce this spun or single yarns
Ply yarn : Single yarn are used in the majority of fabrics for normal textile and clothing applications, but in order to obtain special yarn features, particularly high strength and modulus for technical and industrial applications, ply yarns are often needed. A folded or ply yarn is produced by twisting two or more single yarns together in a operation, and a cabled yarn is formed by twisting together two or more folded yarns or a combination of folded and single yarns. The twisting together of several single yarns increases the tenacity of the yarn by improving the binding-in of the fibres on the outer layers of the component single yarns. Ply yarns are also more regular, smoother and more hard weaving. The direction of twisting is designated as S or Z, just as in single yarns. Normally the folding twist is in the opposite direction to that of the single yarns.
Filament yarn : A filament yarn is made from one or more continuous strands called filaments where each component filament runs the whole length of the yarn. Those yarns composed of one filament are called monofilament yarns, and those containing more filaments are known as multifilaments yarns. For apparel application, a multifilament yarn may contain as few as two or three filaments or as many as 50 filaments. In carpeting, for example, a filament yarn could consist of hundreds of filaments. Most manufactured fibres have been produced in the form of a filament yarn. Silk is the only major natural filament yarn.
Classification of yarn according to their use :
Weaving Yarns : Yarns for woven cloth are prepared for the intended end use. Yarns to be used in the warp, the lengthwise direction of a cloth, are generally stronger, have a tighter twist, and are smoother and more even than are yarns used for filling, the crosswise direction of a cloth. Novelty yarns may be used in the warp, but they are generally found in the filling. Highly twisted crepe yarns are usually found used as filling yarns.
Knitting Yarns : These may be divided into yarns for hand knitting and yarns for machine knitting. Knitting yarns are more slackly twisted than yarns for weaving. Hand knitting yarns are generally ply, whereas those for machine knitting can be either single or ply.
Classification of yarn according to their manufacturing process :
- Carded yarn
- Combed yarn
No comments:
Post a Comment