洗浄の研究 (第11報) : 油性汚こうおよび天然汚こうの洗浄脱落過程の顕微鏡観察

概要

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The removal processes of natural sebum and its model oily soil adhered on twisted yarn and fiber filament in washing solutions were observed by means of the microscope technique. The various behaviors of soil removal were odserved by the combinations of fiber and soil, and also by the structures of substrate on which soil adhered. With respect to cotton, oleic acid adhered on fiber filament was immediately removed after contacting to the detergent solution, but was gradually removed with the formation of droplet and myelinic figure from twisted yarn. Liquid paraffin adhered on cotton twisted yarn was partly removed with the formation of droplet, but without the formation of myelinic figure. With respect to wool, oleic acid adhered on fiber filament formed the unduloid-type droplet, and then was removed with the formation of myelinic figure, but the removal of oleic acid from twisted yarn was not observed. The removal processes of natural sebum from twisted yarn are affected by the compositions of soil, including water-soluble components, and besides by the adhering states of natural sebum. These results were discussed from the view of the following items. (1) The affinity between soil and fiber which appears through the assembly mode of fiber. (2) The phase of the concentrated solution consisted of soil and surfactant.