Methods of Determining the Fibre Content and Evaluating the Fibre Blending in Bicomponent Cellulose Blends

Abstract Chemical methods of determining composition of blends with respect to blends of different fibres have been standardised in many countries. In Poland we also have numerous standards covering most blend types present in the produced textiles. However, these methods cannot be used for studies of quantitative composition of blends containing cotton and bast fibres. There are also methods, less popular and not standardised so far, of determining composition of blends on the basis of changes of the physical properties of the blend in relation to changes of the physical properties of its component fibres. Such methods are usually applied in research work. It seems, however, that they are worth popularising in quality control of half-products and final textiles, as well as in interoperational control. Blending of fibres is one of the most important operations in yarn production processes. Irregularity of fibre blending has an adverse influence on the quality of yarns. Therefore, it is very important to study fibre blending at various stages of the spinning process and to select proper methods of studying the blending. In this work we present and analyse methods used for determination of content and evaluation of blending of fibres in bicomponent cellulose blends.