[in Japanese]

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[in Japanese]

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The effect of foaming action caused by textile (polyester Muslin) on detergency was investigated using tripalmitin and triolein as oily model soil. The shape of soil removal curve as a function of washing time was analysed. The shapes were classified into 3 types which were referred to as: A-type, B-type, and C-type. (A-type; removal achieves to 100% at the beginning of washing time, B -type; removal increases continuously with increasing washing time, C-type; removal increases to a certain level [<100%] at the first stage and varies no more after that stage.) The removal curves of triglyceride of solid state and liquid state were respectively that of B-type and C-type when fatty acid soap was used as detergent. When mesh screen was used as substrate, the removal curve of liquid state triglyceride was that of A-type. It clearly shows the difficulty of removing the liquid state triglyceride existing among the fibers which constituting a yarn.

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The aims of this paper are (1) clarification of criteria upon which each subject chooses the type of store to buy his item of clothes, and (2) solution of relationship between the purposes of using and the type of store and its relation to the results of part 1. Surveyed subjects are female students, their mothers and fathers. Methods are (1) a correlation analysis and (2) a retio test.
Main results are as follows. (1) Each subjects had difference in how to choose the type of store. (2) Each subjects distinguished the type of store according to its respective purpose of wearing clothes.

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Cotton fibers have been either dihydroxypropylated (DHP-) or carboxymethylated (CM-) to enhance the water absorbency (W_A) without changing the handling (Fuh-Ai) and the mechanical properties of cotton fibers. The treatments were conducted topochemically in different ways, namely, for the whole of fiber and for only the inner of fiber. Fibers thus chemically modified were subjected to several tests for judging their end-uses performances. The effects of the chemical species and the topology of introduced hydrophilic residues upon the W_A, the moisture regain and the rate of water regain etc. are discussed. Some of the important findings were: (1) the W_A-value of these samples depends uniquely on the number of hydrophilic residues (the degree of substitution: DS), independent of their chemical species and topology; (2) when sodium salt in the CM-samples is converted to Ca salt, the W_Ais decreased in the order of Na-salt>Ca-salt>“Acidic”. However, the“Acidic”still exhibits a sufficiently high W_Acomparable with that of a DHP-sample having a DS-value higher by ten times than that of a CM-sample; (3) the water absorption bahavior by modified samples does not differ for vapor and liquid, and is independent of the chemical species and the topology of introduced hydrophilic groups.

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