Abstract
Soiling and desoiling properties of particulate soil (Fe2O3 · H2O) to polyester staple fibers in the binary solvents of petroleum and various alcohols have been investigated in an incubator with weak mechanical oscillation at 20°C.
The main results obtained are summarized as follows :
1) In the single solvent system, the degree of removal of Fe2O3 · H2O decreased in the order of ethyl alcohol > tetrachloroethylene > n-undecane >n-heptane > n-hexane.
2) In the binary solvent system (n-heptane/ethyl alcohol or n-undecane/n-octyl alcohol), the degree of removal of Fe2O3 · H2O increased remarkably with a ca. 5 % alcohol content and similar results were obtained with the addition of surfactant (Aerosol OT) to petroleum solvent.
Therefore, it was suggested to save added surfactant in non-aqueous cleaning with petroleum/alcohol binary solvents.
3) Soiling properties were affected by the component of solvent and the deposition of Fe2O3 · H2O on polyester fiber decreased with a ca. 5% alcohol content in the solvent.
4) In the binary solvents of n-undecane and various alcohols, the deposition of Fe2O3 · H2O decreased in the order of ethyl alcohol > n-propyl alcohol >n-butyl alcohol > n-octyl alcohol.
