| In an effort to meet the ever increasing demand for consumers' demand for quality, more textile and garment manufacturers are turning to Bio-polishing that is in denim washing to accomplish a stone washed look without the stones. Bio-polishing is an enzymatic process that removes fuzz and thus eliminates piling in cellulosic fabrics such as cotton. This keeps the fabric looking new even after repeated washings. It also enhances feel and drapability, and gives a washing down effect in color. There is, however, a weight reduction and a loss in strength proportional to weight reduction.In view of the foregoing, this research will endeavour to investigate the treatment conditions on both cotton and polyester blends in order to ascertain the optimum conditions which would give a good hand and a reasonable strength and weight loss. Needless to say different celluloses and softeners will be used on woven.This investigation examines several parameters that impact the resultant properties, such as fabric composition and state, treatment time, and enzyme concentration. Fabric composition varies from 100% cotton,60/40 cotton/polyester. The state of the fabrics, whether dyed or in a greige state is also examined. Establishing a treatment protocol is of significant interest. Thus, this investigation examines treatment durations. varying from 30 to 180 minutes and enzyme concentrations varying from 0.5 to 3.0% o.w.f. It was found that while the treatment yields a softer, more drapable fabric with reduced pilling, a reduction in physical strength and basis weight was also observed after treatment. The cotton/polyester fabrics appear to retain more of their initial physical characteristics than the 100% cotton fabrics. Differences in the substrate compositions and structure account for these results. By examining the resultant properties of all the fabrics, such as flexural rigidity and tensile strength, this research was used to generate a multi-linear model to be used in the prediction of fabric properties following treatment.These models displayed good coefficients of determination for the fabrics used in this investigation. Additionally using these models, a treatment protocol, with variable duration and concentration, can be determined utilizing the resultant properties of interest.The steps of the investigation will be broken into a series of sections, which are given below. Section one-Literature Review of Biopolishing Ⅰ. Structure and Function of Cellulase EnzymesⅡTreatment Protocols and Applications in denim fabrics Industries Section two-Production of Cellulosic woven FabricsⅠ. Production of 100% Cotton and cotton/polyester Fabrics Section three-Treatment of Cellulosic woven FabricsⅠ. Treatment with Variable DurationⅡ. Treatment with Variable Enzyme Concentration. Enzyme concentration has a significant effect on the reaction. For a constant amount of substrate present in the solution, the more the amount of enzymes present in the solution, the higher the reaction rate Section four-Evaluation of Physical and Chemical CharacteristicsⅠ. Physical and Chemical Testing. Will evaluate several characteristics of the fabrics to determine the degree of hydrolysis that occurs during treatment and the changes that may occur in the strength and morphology of the fibres and the fabrics. Section five-Propose a Treatment Protocol for Fabrics... |
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