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Comparison of the Effect of PET Fibres’ Surface Modification Using Enzymes and Chemical Substances with Respect to Changes in Mechanical Properties

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This paper presents a comparison of the chemical modification effectiveness, as the traditional and the most used possibility of PET fibres surface modification and the biochemical modification, as the new method, being the alternative to the traditional one in aspect of their influence on the fibres mechanical properties. The object of the investigations were PET fibres, differentiated in their orientation and crystallinity degree, as a result of technological draw ratio differences in the range of characteristic values for typical fibre assortments designated for cloth and technical fabrics. Our previous investigations enabled to determine that the change in the general surface characteristics of PET fibres (microtopography and hydrophilicity) leads to changes in both their volumetric (dyeability) and surface properties (wettability, pilling, oil-soil removal, electric properties), PET fibre modificationmore advantageous for as well as to identify that enzymatic processing is. In this paper, the effects of modification were analysed from the point of view of changes in the mechanical properties. In the case of enzymatically treated fibres, the influence of enzyme preparations on changes in the fibre’s mechanical properties is evidently dependent on the kind of enzymes, especially for fibres with lower draw ratios. Changes in the fibre’s elongation at break are generally bigger for fibres treated with chemical substances. The decrease in tenacity and elongation is clearly smaller when fibres with higher draw ratios are treated with Lipozyme and Esterase.

Tags: polyester fibres, surface modification, mechanical properties

Citation: Kardas I., Lipp-Symonowicz B., Sztajnowski S.; Comparison of the Effect of PET Fibre Surface Modification Using Enzymes and Chemical Substances with Respect to Changes in Mechanical Properties. FIBRES & TEXTILES in Eastern Europe 2009, Vol. 17, No. 4 (75) pp. 93-97.

Published in issue no 4 (75) / 2009, pages 93–97.

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