Abstract
Detergency and soil redeposition of wool fabric in drycleaning solvents, i.e. petroleum solvent, perchloroethylene (PCE), decamethylcyclopentasiloxane(D5), with commercial detergents were studied. The detergency of wool soiled cloth in drycleaning solvents without detergents were the order of PCE > petroleum solvent > D5. When commercial detergents were added to the system, the detergency were greatly improved. When 1.0% water was added to solvents/commercial detergents system, the detergency of petroleum solvent and PCE improved whereas that of D5 decreased. The soil redeposition prevention effects of solvents were the same order of detergency, i.e. PCE > petroleum solvent > D5. When commercial detergents were added to the system, the soil redeposition changed depending on solvents and detergents. The soil redeposition in D5 became higher with a commercial detergent, therefore it is important to develop appropriate detergents for D5. Three silicone surfactants were tested for detergency and soil redeposition in D5 to find candidate surfactants for drycleaning detergent formulations. Silicone surfactant PEG/PPG-19/19 Dimethicone was found to be the best surfactant for D5 drycleaning detergents.
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