Textile Science Yarns FCS – TS – 4 M. Chatelain

 Deliberately created with differing parts  Irregular at intervals  Differences may be:  Subtle  Very obvious  Random

 Single ply, or  Plied, or  Cord, or  Any combination of yarn types

 The yarns are unique and create a “novel” look to the fabric  These novelty yarns add visual interest to the construction of fabrics

 Number of parts in yarn  Usually classified for the effect that dominates the yarn (slub, tweed, spiral, boucle, etc)

 For a variety of applications  Add permanent interest to plain fabrics  Used only in the filling direction of the weaving process because it is more economical

 Tweed  Slub  Spiral or Corkscrew  Ratine  Knot, spot, nub, or knop  Spike or snarl  Loop or boucle  Metallic  chenille

 Single spun novelty yarn  Has flecks of short colored fibers that add its characteristic “tweed” appearance

 A single, spun novelty yarn  A yarn that has obvious thick and thin parts  The thicker part is referred to as the “slub”  Typically used in shantung, drapery, and upholstery fabrics

 Have 2 or more plies of yarn  The plies may differ in color, twist, size, or type  Have a spiral or corkscrew appearance  These yarns are used for both furnishings and apparel.

 Ply is twisted in a spiral pattern around a ground ply  A longer loop is thrown out at intervals, kinks back on itself and is held in place by a binder yarn  Ratine yarns are mainly used in furnishings

 Also referred to as spot, nub, or knop yarns  Made by twisting the effect yarn many times in the same place to form the “knot”, “spot”, etc.  Knot yarns are used in apparel and furnishings

 The effect yarn forms open loops along both sides of a yarn  Spike yarns are utilized in apparel and furnishings

 Also known as loop or curl yarns  Effect yarn forms closed loops at regular intervals  Create a look like lambskin

 May be made with a single or ply yarn  Metallic component is made with actual metal parts or a ultrafine plastic fiber

 Produced by cutting specially woven ladderlike fabric into warpwise strips  Cut ends of the softly twisted yarns loosen and form a fringe  Weaving of strips produce a pile on 1 or both sides  Chenille yarns are used in fur