engleski

Improving the modification of Tehnical Flax Fibers

Introduction Obtaining fine flax fibres from technical ones presents a number of problems and various, more or less, acceptable processes of cottonisation have been developed. Flax cottonisation is based on the ability of the technical fibre to be split to the level of elementary fibres, which is closely connected with the noncellulosic components (pectin). Another problem is how to obtain a satisfactory target degree of whiteness of the flax fibres. Because of a relatively high content of noncellulosic matter in technical flax fibres, they are frequently subjected to various combined chemical treatments of bleaching, applied in a number of steps [1]. Ultrasound causes cottonisation by weakening the bonds between elementary fibres in a technical fibre [2]. If the fibres are exposed to ultrasound in a bleaching solution, bleaching can be achieved simultaneously with cottonising. The investigation results indicate not only an ecologically favourable cotonization but also positive effects of the ultrasound during cotonization and bleaching.

cottonization; ultrasound; bleaching

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