Multi response optimization in the development of anti-pilling and easy care finished rayon from bamboo and bamboo/cotton fabrics using desirability function

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The present study discusses the optimization of process parameters of anti- pilling and resin finished rayon from 100% bamboo and 50:50 bamboo/ cotton fabrics used in home textile. Two weave structures, plain and five harness satin were selected. The optimization was carried out using desirability function a statistical technique for multiple response optimization. This was done by software called Design Expert 8.0.1. The five factors namely, Appretan® N 9211 as an anti-pilling agent (a non-ionic acrylate copolymer), Arkofix® NF as crease resistant agent (dimethylol dihydroxy ethylene urea, DMDHEU), fabric blend ratio, fabric weaves and curing method were analysed using 23 32 mixed level factorial design. The optimum conditions were explored for concentration of Appretan® N 9211, Arkofix® NF and curing methods. The process was evaluated with respect to pilling before and after wash, abrasion resistance, tensile, tear strength, Berger whiteness, yellowness index, dimensional stability, smoothness appearance and colour fastness to light. In order to generate the desirability values, the equal weightage was given to all response variables, but different importance was assigned based on the finish applied and industrial requirements. Four optimized recipes each for rayon from 100% bamboo and of 50:50 bamboo/cotton plain and satin weaves were suggested based on the high value of desirability.