PSR is a high-grade environmentally friendly chemical additive for polyether polymer synthesis. It can replace high temperature levelling agent, bath anti-wrinkle agent, finishing water wicking agent, antistatic agent and hydrophilic softener in the process of polyester chemical fiber dyeing. Polyester and nylon fabrics have a PSR-treated fabric with the unique style of cotton natural fabric. At the same time it gives the fabric a soft hand and good water absorption. The fabric retains its original advantages such as long-lasting resilience, drape and tightness. It is especially suitable for the special style of polyester fabric imitation wool, imitation linen and artificial silk.