TYPES OF FANCY YARN(Diamond, Fasciated, metallic, Button, tape):-

Types of fancy yarn:-

DIAMOND YARN:-

A diamond yarn is made by folding a thick single yarn or roving with fine yarn or filament of contrasting color using an S-twist, and cabling it with a similar fine yarn using Z-twist . A ltrue diamond yarn will show some effect compression effect upon the thick yarn from the thin one , an effect which in the interest of clarity has been omitted from Fig. 15

fig. 15 Diamond yarn.

FASCIATED YARN:-

This is a staple fiber yarn which , by virtue of the method used in its manufacture consist of a core of parallel fibers band together by wrapper fibers Fig.16 . The yarn produced under the hollow spindle method are also frequently described a Fasciated, since the binder is applied to an essentially twistless core of parallel fibers.

Fig. 16 Fasciated yarn.

METALLIC YARN:-

Cloths of metallic threads of gold or silver , are known to have been made thousands of years ago. Modern metallic yarns are however, usually made from laminated plastic films are first caoted on both side with metallic paint of suitable color, a further transparent coating is applied on top to enhance the wear resistance. The films are cut into thin strips to be used on yarns. It is unusual to use these slit film yarns directly in fabrics because of poor abrasion and strength properties . They are often used as a component in a compound yarn Fig. 17 shown an example of a metallic yarn .

Fig 17 Metallic yarn.

BUTTON YARN:-

The "button" is an intermittent effect, created a sudden pause in the progress of the core yarns , which allows a build-up of the effect material, usually in this case a sliver or roving (fig.18) . While in yarn form it can offer a truly dramatic effect, it is less than straight forward to process into fabrics , and in practice it is  usually found in its more discreet manifestations . The exception to this is of course in hand knitter will be able to devote the time and core required to achieve a successful result 

Fig .18 Button yarn

TAPE YARN:-

Tape yarn may be made by a variety of method and take the form of flat ribbond or tapes. In recent years these material have become better known especially in fashion knit wear . They may take the form of genuine ribbons or tape , woven an narrow fabrics looms, or they may have a knitted or braided structure. 

 image of Tape yarn.

Uses of fancy yarn:- 

As the primary aim of using fancy yarn is to enhance the aesthetic appearance of fabric , there is a continued effort by the producer to come up with new yarns that differentiate themselves from competitors. Fancy yarns have wide ranging applications in apparel at all levels of the market. Upholstery and home furnishings have offered a relatively new field to spinners of fancy yarn over the past 20 years. 

However one main draw back of using fancy yarn lies in the increased cost of yarn , fabrics  and garments manufacture.  The production speed for fancy yarns are generally slower than for plain commodity yarn because of inherent unevenness of fancy yarn. In addition, most fancy yarn requires multiple components and several twisting stages, so that the cost of fancy yarn production is typically several time that of commodity yarn.

Fancy yarns are also for more sensitive to fashion trend, so it is unwise to produce large quantities without order confirmation. Any redundant stock will be highly costly to the yarn producer . In fabrics production, the uneven nature of fancy yarn will demand more carefull handling and slower production, speeds, leading to increase fabric costs. The interaction with the fabrics structure also means that the final appearance of the fancy effect can be unpredictable so in most cases, samples must be produced prior to normal production.

With some exceptions, the use of fancy yarn will lead to lower fabric performance in the terms of strength, wear resistance and after care. Careful consideration must therefore be given to the performance requirement of endbuse and to the quantities of fancy yarn in the fabric when it  are to be used . Given the higher cost and lower performance, the main use of fancy yarn is usually more high value and high margin application.

Fancy yarn are used in weaving of suiting, shirting , dress material , upholstery, furnishing fabrics, and woolen towels . 

Fancy yarns are also used for decorative textiles like; 

1) Curtains.

2) Carpets, 

3) Ladies and children outbwear.

4) Decor materials and textile fabric in corporate sector, as for example in the trim of a car or textile furnishing of a hotel lobby are becoming more and more important.

Ref:-https://www.textileltlearner.net.