Fatty Soil Retention and the Influence of Particulate and Fatty Soils on Yellowing of an Unfinished Dacron/Cotton Blend Fabric

Abstract

The retention of individual fatty soils, in both the presence and absence of clay soil, on repeatedly soiled, aged, and washed unfinished Dacron/cotton blend was studied by means of a double-label radioactive tracer analysis. Fatty soil retention was influenced by unsaturation, polarity and chain length, but the presence of clay soil was not a significant factor under the experimental conditions employed.

Fabric yellowing was measured on samples soiled with clay and pairs of fatty soils and on appropriate controls. None of the organic soils caused observable yellowing in the absence of clay. While clay soil alone contributed significantly to residual yellowness, additional yellowing occurred on samples soiled with clay, oleic acid, and triolein. It was hy pothesized that the yellowing behavior observed when clay, oleic acid and triolein were present was due primarily to the embedding of pigmented particulate soil in a polymerized fatty film during the second clay soiling process.

Keywords

Unfinished Dacron/cotton blend. Particulate soil kaolinite clay. Organic soil sebum components oleic acid trio lein stearic acid tristearin palmitic acid octadecane. Labeled compounds (3H) tritium isotope (14C) carbon-14 isotope tracer techniques. Deionized water detergent. Liquid scintillation counting correlation curves. Fatty soil double-label soil. Counts isotope activity. Statistical analysis. Retention fatty acids triglycerides chain length unsaturation hydrogen bonding polarity. Yellowing autoxidation polymer film embedded particulate soil.

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