Análise comparativa da resistência de jeans com diferentes composições, após submetidos a lavagens de clareamento e marmorizado

Abstract

This study is motivated by the high popularity and acceptance of denim, driven by the growing demand for garments that align with fashion trends. However, the volatility of these trends often results in less durable pieces. One of the reasons for this outcome may be the finishing processes employed by industrial laundries, which aim to achieve specific aesthetic effects. The bleaching and acid washed processes significantly alter the surface of denim by using oxidizing and abrasive agents that can compromise its strength. The research aimed to understand the effects of these processes on the strength of denim by using tensile tests to quantify mechanical resistance, evaluating samples with compositions of 100%CO and 79%CO/19%PES/2%PUE. The results showed that the processes directly impact the strength of the fabrics. For the 100%CO, acid washed led to a 39.34% reduction in warp yarn strength, while bleaching caused a 37.91% loss. For the mixed composition denim, acid washed resulted in a 21.74% decrease in tensile strength in the warp direction, compared to an 18.58% reduction for bleaching. However, in the weft direction, bleaching had a greater effect on the mixed fibers, with an average reduction of 33.67%, compared to 26.53% for acid washed. The study's focus on resistance aims to encourage the production and conscious consumption of more durable products, meeting consumer expectations in terms of style while also reducing the premature disposal of garments before the end of their useful life.