1. Alexandria UniversityChenille Fancy yarn

2. ContentContent End useIntroductionChenille yarn Yarn Type Production Structure Factors affects in yarn properties 3. Introduction productivityprocessing costsnew products or variants ofexisting ones 4. Fancy yarnFancy yarns are and will always be up-to-date, as there is noalternative to them.Fancy yarns display deliberately introduced , in eitherandor in. 5. Chenille yarn is a kind of fancy yarn whichbecause ofits and . Chenille yarns are constructed bytwisting together in chenille yarn machines, where yarns are inserted at right angles to the core yarnsurface to create a surface in which the fibres contained in the pileyarnsFigure 2 : chenille yarn structure 6. Chenille yarn can be made from many different types of fibers andyarns. Most common are , (rayon), ,and(olefin).Chenille yarn can be made in many differentsizes, ranging from as heavy asNm to as fine as Nm. 7. yarns coming from the two guides at both sides form the coreyarns .The one coming from the middle guide (rotating head) formsthe piles.On each side of the cutting knife, there are two core yarns which maybe either single or two-fold yarns .The number of the pile yarns and how many of them are fed onto thecore determines the count of the yarn 8. Factors affects in yarn properties Core and effect yarn material Yarn count of the core and pile yarn Pile length, mm (determined by the size of the caliper) Yarn twist, turns/meter (determined by the spindle speed and the deliveryspeed) Retraction value ,% (the length of yarn is reduced because of twisting coreyarns) Rotary head speed, rpm (determines pile density) Rotary head diameter, mm Spindle speed, rpm (determines twist level) Winding speed, m/min (determines production speed) Pile density (determined by the speed of the head) 9. Table 1. Range of the values belong to chenille yarn parametersParameters RangeRotary head speed, rpmSpindle speed, rpm Production speed, m/minChenille yarn count, Nm Core and pile yarn count, Nm Number of the pile yarnsYarn twist, turns/meterKnifeGillette typethickness,Rotary blade mm Caliper size, mm Caliper thickness, mm