Abstract
Seven denim fabrics were produced with yarns obtained from cotton fibers (CO), recycled polyester (r-PET), recycled cotton fibers (r-CO), and recycled Tencell fibers (r-Tencell). A mixed washing process using cellulase enzyme and synthetic stones was applied on these fabrics using Smart foam technology. We established using MINITAB® 17.1.0 statistical software a mixed-level factorial design of experiments to study the effects of 2 categorical factors: recycled fiber percentage and enzyme type and 3 continuous factors: treatment time, enzyme dosage and synthetic stone percentage. The output or the response is the tear strength loss of treated fabrics. The main goal of this work is to keep fabric tear strength within tolerable limits (>2500 cN). Critical and optimal processes were obtained using response surface methodology (RSM) and desirability functions. Correspondent tear strength losses were discussed.
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