抄録
Soiling and desoiling properties of fabrics (cotton, polyethylene-terephthalate and polypropylene) in the dispersion of ferric oxinate soil in the surfactant solution (fatty acid soap, Na-ABS, Na-LAS Na dodecylsulphate and polyoxyethylene condensate of nonylphenolether) have been investigated.
Samples were soiled under mild oscillation of soil/surfactant solution/fabric system at constant temperature until the establishment of the equilibrium of adhesion of the soil.
Main results obtained were as follows :
(1) Degree of soiling (adhesion) was affected by the concentration of the surfactant and a characteristic maximum and minimum was observed in the dilute region.
(2) Desoiling properties of artificially soiled fabrics at different concentrations of the surfactants investigated also showed the existence of maximum and minimum in each combination of soil/ fabric/surfactant.
(3) The definite interpretation of the maxima or minima at a certain concentration of the surfactant in connection with soiling and desoiling is not given at present. However, it is clear that the degree of soiling in an extremely dilute surfactant solution (0.005 0.05wt %) exceeds that in water
