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Characteristic and Application of Knop Fancy Yarns

Research and development


  • Grabowska Katarzyna Ewa
    Institute of Textiles Architecture, Faculty of Material Technologies and Textile Design, Lodz University of Technology, Łódź, Poland
  • Ciesielska-Wróbel Izabela Luiza
    Department of Textiles, Faculty of Engineering and Architecture, Ghent University, Gent, Belgium

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Apart from the simplest division into continuous and point effects, the classification of fancy yarns does not exist. There is also no published complex guide concerning technological aspects of the production of fancy yarns. The elaboration of such guides could be time consuming and probably they would not fit exactly the requirements of rapidly changing industry and end-user demands. The geometry of the effects could be considered as a classifying factor. Other factors supporting classification are the tensions of component yarns occurring during the twisting process. Thus we can classify knop yarn as a point effect fancy yarn, and according to the tension changes we rank knop yarn as a subgroup of bunch yarns. In the knop yarn group, the component yarns change their functions during the twisting process – periodically one of them is the core yarn and next it changes the function to become an effect yarn. In this way one may obtain fancy colour effects. The properties of this type of yarn were investigated focussing on changing the twist and frequency of occurring effects using multiple regressions. The most useful seems to prediction of the impact of the knop yarn type of aesthetic of fabrics and their mechanical parameters.


knop fancy yarn, mechanical properties, classification, geometric model, production method.


Grabowska KE, Ciesielska-Wróbel I. Characteristic and Application of Knop Fancy Yarns. FIBRES & TEXTILES in Eastern Europe 2015; 23, 1(109): 17-25.

Published in issue no 1 (109) / 2015, pages 17–25.


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