Sustainable Closed-Loop Mask Supply Chain Network Design Using Mathematical Modeling and a Fuzzy Multi-Objective Approach

The outbreak of the deadly coronavirus, which is increasing number victims every day, has created many changes in today’s world. use various masks most important social tool against this virus. Given importance rapid and quality supply current situation, it necessary to study chain particular. In research, design a closed network for different types assessed. studied includes suppliers, manufacturers, distributors, retailers forward flow collection centers, separate recycling disposal centers backward flow. regard, multi-objective mathematical model with objectives total profit reducing environmental impact, maximizing responsibility presented. optimization been done using fuzzy approach GAMS software. results show that minimizing effects are contrast each other. addition, sensitivity analysis indicated customers’ demand can affect all aspects sustainable simultaneously.