Effect of water-soluble polymers on washing and anti-redeposition behaviors toward particulate soil for nylon fabric

Abstract

  In this paper, the effect of anti-redeposition agents on washing and anti-redeposition behaviors of an anionic surfactant, n-sodium dodecylbenzene sulfonate (DBS), toward carbon black soil has been investigated in aqueous DBS-anti-redeposition agents mixed solutions with 0.05mol/l of sodium sulfate at 40℃. Hydroxypropyl cellulose (HPC) and Poly (ethylene glycol) (PEG) were used as anti-redeposition agents.

  The degree of detergency (D) for nylon fabric increased with increasing the concentration of HPC and PEG, but it seemed to be unchanged at heigher concentration of them. The degree of soil-redeposition (S) for the fabric showed a reverse tendency from D. A significant molecular weight range was recognized for D and S at each anti-redeposition agent. Further, the anti-redeposition action of HPC and PEG was also effective at repeated washing cycles.