Bioenzymes and the effects of bioenzymes on properties of knitted fabrics

In this thesis, bio-polishing, which is one of the most recent and conventionally used method of pretreatment for anti pilling in textile finishing, and its effects on quality of various performance properties of fabrics when applied after dyeing were reviewed.In the study, the influences of enzyme application on the color characteristics, pilling degrees, fastness and CIELab color values of knitted fabrics have been analyzed regarding the concentration and chemical structure of enzyme, tone of color and viscone fiber contents of the fabrics.For this aim in the research, %100 cotton and %75-25 Cotton-Viscone (cotton fiber is same in two fabrics) knitted fabrics were used. Both samples were dyed into two different tones (dark and light tone) of the same colour at current industry conditions. After dyeing, cellulase enzymes in 3 different chemical structure (standard, modify and endo-enriched cellulase) and 4 different concentration were applied to the samples at the laboratory conditions. Before and after enzyme applications, color measuring, color fastness and pilling tests were applied in order to determine the most suitable type of enzyme regarding the anti pilling characteristics and effects on the color of fabrics.The results were evaluated by statistical analyse by the aid of pilling test, CIELab color coordinates and fastness values.Key words : Biopolishing, Cellulase Enzyme, Knitted Fabric, Cellulose, Viscose