Wednesday, March 3, 2021

Different types of fancy yarns

 Fancy yarns:

The fancy yarn is a yarn that looks different from regular yarns. The yarn surface of fancy yarns is modified by different methods. The common examples of fancy yarns are given below:

Tape yarn: 

Tape or ribbon yarn may be produced using various processes including braiding, crocheting, warp knitting, and weft knitting. In recent times this material has become better known especially in fashion knitwear. It is also possible to use narrow woven ribbon, narrow tapes of nonwoven material, or slit film in the same way. The taps yarns are manufactured in a tube and flat form.

Marl yarn:

This is the simplest fancy yarn. In this fancy yarn, two yarns of different colours are twisted together in the yarn doubling process. The texture of marl yarn looks different from normal double yarn. These yarns are used to manufacture discreet pinstripes in man's suitings. Irregular patterns are also made in the knitted fabric.

Knop yarn:

The knop yarn contains prominent bunches of one or more of its components. These bunches get arranged at regular or irregular distance intervals along yarn length. It is usually produced by using an apparatus with two pairs of rollers. Each pair of rollers has the capability to operate independently. This arrangement makes it possible to deliver the base thread intermittently. The knoping thread gets delivered continuously. The twist insertion collects the knoping thread into a knop or bunch. The vertical movement of the knoping thread forms a knop. The vertical movement of knoping bars determines whether knop is small and compact or spread out along the yarn length.

Diamond yarn:

A diamond yarn is produced by folding a coarse single yarn or roving with a fine yarn or filament of contrasting colour using an S-twist. This is cabled with similar fine yarn using Z-twist. Multifold cabled yarn may be made by extending and varying this technique to produce a wide range of effects. 

Gimp yarn: 

A gimp yarn is a compound yarn consisting of a twisted core with an effect yarn wrapped around it so as to produce wavy projection on the yarn surface. Since a binder yarn requires providing stability to the structure so that complete yarn gets produced in two stages. First of all, two yarns of widely varying counts are plied together. Thick around thin and are then reverse bound. the process of reverse winding removes the twist that creates a wavy profile as it makes the effect yarn longer than the actual length of the complete yarn. The texture properties of gimp yarn are clearly better than spiral yarn.

Spiral or corkscrew yarn:

This is a plied yarn displaying the characteristic smooth spiralling of one yarn component around the other. It is very similar to the marled yarn. One yarn is overfed in spiral yarn. 

Boucle yarn:

This type of yarn is characterized by a tight loop projecting from the body of the yarn at fairly regular intervals. These yarns consist of three different yarns. The three components of yarn are core, the effect, and tie or binder. The effect yarn is wrapped in loops around a core or base yarn. The third ply ( binder) is wrapped over the effect ply in order to hold the loops in place.

Loop yarn: 

The loop yarn consists of a core yarn with an effect yarn wrapped around it and overfed to produce a nearly circular loopy projection on its surface. The core yarn has two plies twisted together. Core yarn entraps the effect yarn. Generally, four yarn are used to produce this yarn. Two yarns make core or ground yarn. The effect yarns are formed with an overfeed of 200 % or more. The effect yarn is not entrapped completely by ground threads, therefore, is necessary. The size of the loop is determined by the level of overfeeding. 

Fascinated yarn:

This is a staple fibre yarn. It consists of a core of parallel fibres. These fibres are bound together by wrapper fibres. Yarn produced by the air-jet spinning process is structured in this way. The yarn produced by the hollow spindle method is also frequently as fascinated yarn, as a binder is applied to an essentially twistless core of parallel fibres. 

Slub yarn:

In this kind of yarn, the slubs are deliberately created to make desired discontinuity effect in the yarn. The slubs are thick places in the yarn that may take the form of a very gradual change with only a slight thickening of yarn at its thickest point. The thickness of the slub gets three to four-time coarser than base yarn. The yarn thickness is achieved for short yarn lengths. 

Chenille yarn:

The actual chenille yarn is produced from a woven leno structure that is slit into a narrow, warp-wise stripe to serve as a yarn. the chenille yan contains piles on its surface. The pile length gets almost uniform throughout the yarn length. The pile length may also be varied if you produce irregular pile length. These yarns are used in furnishing and apparel. It has fuzzy and soft piles. the specialized machine is used to produced chenille yarn.

Covered yarn:

The covered yarn has a core that is completely covered by fibre or another yarn. The core yarn may be elastomeric yarn such as rubber, spandex, or any other yarn. It is manufacture by single or double covering both. The second covering is usually twisted in the opposite direction of the inner covering. The fabric made with these yarn has a heavier weight.

Composite yarn:

These yarns are also known as compound yarn. These yarns consist of at least two threads. One thread makes the core of the composite yarn and the other thread makes sheath components. One thread is a staple yarn and the other is a filament yarn.  The compounds yarns are even in diameter and smoothness. These yarns are available in the same count range as spun and filament yarns

Metallic yarn:

The metallic yarn may be made of monofilament or ply yarn. There are two kinds of processes used to manufacture metallic yarn. The lamination process seals a layer of aluminium between two layers of acetate or polyester film which is cut into strips for yarn. The metalizing process vaporizes the aluminium at high pressure and it gets deposited on the polyester film.


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