Comparative Performance Analysis Between Potassium Permanganate (KMnO<sub>4</sub>) Spray and Alternative PP (KMnO<sub>4</sub>) Spray on Various Properties of Denim Fabric

Abstract

The growth of denim items in global market is rising steadily. The aesthetic appearance and design of denim are one of the causes for this increase in demand. This study was attempted to compare the performance relating to potassium permanganate spray and alternative potassium permanganate spray on denim fabric. In this research; after the application of de-sizing, stone enzyme, bleaching, neutralization processes; stretch denim fabric was all over sprayed with potassium permanganate along with alternative potassium permanganate in varying concentration. After neutralization and drying, the different features of denim fabric was explored accordingly. For comparison, industrially performed potassium permanganate concentration solution of 2%, 3%, and 5% were applied as well as alternative potassium permanganate concentration solution of 60%, 80%, and 100% were also utilized. After applying those chemicals, samples were neutralized and dried in a steam dryer. Finally, the mechanical properties like fabric tensile strength, tear strength were determined respectively. All of the tests were carried out according to ISO standards. The physical properties like color fastness to rubbing, color fastness to wash, GSM, pH values were also checked. Specially EIM (environmental impact) was also investigated; in that case, samples treated with potassium permanganate spray exhibited poor performance than the alternative potassium permanganate sprayed sample. In the case of alternative potassium permanganate spray after increasing the concentration of chemical, tensile and tear strength decreasing percentage was observed almost similar, while in the case of potassium permanganate spray, a decrease relating to tensile and tear strength properties were observed after increasing the chemical concentration respectively. On the other hand, the grading related to color-fastness to rubbing was better. But there was no significant change was observed for the grading related to color fastness to washing for samples treated with potassium permanganate and alternative potassium permanganate spray. In terms of EIM investigation, samples treated with alternative potassium permanganate spray showed satisfactory values in accordance with worker and eco-friendly aspects.