The compressive property of the human body is important from a viewpoint of clothing pressure. An instrument was developed to measure the compressive property of the human body. On the thigh and the waist, compressive stress-strain properties were measured by using various compactors of the instrumnent. The results were as follows: (1) On the thigh and thigh model, compressive stress-strain property varies according to the compressive dimensions and the compressive surface shape of the compactors. As to the compactors having the same surface shape but different dimensions, compressive stress value decreased inversely as the compressive dimensions of the compactors at the same compressive strain value. As to the compactors having the same compressive dimensions but different circumferences, compressive stress of the compactor which has longer circumference was stronger than that of others. (2) On the parts of waist consisting of warious rigidness, compressive stress-strain properties which were measured by the compactors of different dimensions showed a similar tendency to those of thigh.
Plain cotton fabrics were finished with modified polysiloxanes, which were prepared by heating a mixture of cyclic dimethylsiloxane, cyclic N- (2-aminoethyl) -γ-aminopropylmethylsiloxane, decamethyltetrasiloxane and a catalyst. The static frictional force between two specimens of the same finished fabrics was measured to investigate the effect of amino group in the modified polysiloxanes on the surface characteristic of fabrics. The static frictional force decreased as the concentration of finishing solution increa sed, and became constant above 0.5 wt% in a similar manner as polydimethylsiloxane. The static frictional force of fabrics treated in 1 wt% treating solution showed the minimum value as the content of N- (2-aminoethyl) -γ-aminopropylmethylsiloxane portion (amino portion) in the modified polysiloxane increased. Judging from the measurement of the static frictional force for the fabrics treated with the mixture of polysiloxanes, it was found that the influence of modified polysiloxane on the static frictional force became stronger as the content of amino portioninin the modified one increased.
Some properties of washing liquor of phosphate-free detergent, anionic surfactant (DBS or AOS), sodium polyacrylate (SPA) and protease (Alcalase) system, were studied from a view point of interactions among the soils, the detergent components and calcium ion. 1) It was found that Alcalase was inactivated by DBS, AOS and SPA, but on the other hand, it was activated by calcium ion. Therefore, it was considered that the protease activity and the hydrolysis of protein soil in hard water were influenced by the interaction properties of these components for calcium ion, and also by the amount of Alcalase formulated in the detergent. 2) The removal efficiency and the deposition of protein soil onto a fabric were influenced not only by Alcalase, but also by the behavior of particulate soils coexisted on the fabrics and in the washing liquor. 3) In the same mechanism, the removal efficiency and the deposition of particulate soils onto a fabric were influenced by the surfactant and/or SPA builder as well as by the Alcalase.