HUEC 2040-CH. 13 OUTLINE

HUEC 2040-CH. 13 OUTLINE - CHAPTER 13YARN STRUCTURES Fibers...

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CHAPTER 13-YARN STRUCTURES - Fibers to be woven or knitted into cloth must be formed into long, continuous strands— yarns o Long filaments OR o Short staple lengths - Yarn structure enhances or detracts from inherent qualities of fiber from which yarn is made - TYPES OF YARNS o Filament Yarns Made from long, continuous strands of fiber Monofilament yarn— made from single filament; limited use in nylon hosiery, open-work  of industrial uses made by extrusion of large sinlge filaments from spinnerets OR by slit-film technique multifilament yarns— many filaments joined; made more cohesive by twisting together loosely or  more tightly texturing— o Staple Yarns Also  spun yarns Must be held together by some means to be formed into long, continuous yarn All yarns except those from silk spun had to be spun from short staple fibers—was originally  twisted together by hand o Yarns Classified by Number of Parts Single yarn— made from group of filament OR staple fibers twisted together if untwisted will separate into fibers identified as: single yarn of staple fibers OR single yarn of filament fibers
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Ply yarns— made by twisting together two or more single yarns if untwisted will divide into two or more single yarns ply— each single yarn twisted into a ply yarn Cord yarns— made by twisting together two or more ply yarns Identified by untwisting yarn to form two or more ply yarns Woven as decorative yarns into some heavyweight novelty fabrics o Yarns Classified by Similarity of Parts Simple yarns— Varying degrees of twist—lose to moderate, tight, OR hard regular surface One strand of fibers twisted together evenly—simple single yarn Two simple single yarns twisted together—simple ply yarn Novelty yarns— made to create interesting decorative effects Also:  Fancy yarns  OR  complex yarns Complex— usually have more than one part fabrics where strength not as critical
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This note was uploaded on 05/06/2010 for the course HUEC 2040 taught by Professor Staff during the Fall '08 term at LSU.

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HUEC 2040-CH. 13 OUTLINE - CHAPTER 13YARN STRUCTURES Fibers...

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