Some preliminary experiments on the preparation of cellulose phosphate by the urea-phosphoric acid method and comparison of the electrolytic dissociation of cellulose phosphate with those of analogous polyelectrolytes led to the following conclusions:
1) Autooxidation of cellulose in the condition of phosphorylation which leads to depolymerization can be avoided by conducting the phosphorylation in atmospheres of inert gases. The adsorption equibrium of urea and phosphoric acid to cellulose is established comparatively rapidly, but the difference between the ratio of urea to phosphoric acid adsorped to pulp fiber and the ratio in the aqueous mixture showes that urea is adsorbed by pulp fiber more strongly than by phosphoric acid.
Pretreatment with various cellulose-swelling agents including some kinds of inorganic salts is useful to increase the amount of phosphorus combined with cellulose and phosphorus content is related to the degree of swelling. 2) The characteristics of water soluble cellulose phosphate in electrolytic dissociation and in the change of viscosity show a considerable resemblance to those of other polyelectrolytes which bear dibasic acid groups or two kinds of dissociating groups, but the neighboring groups in cellulose phosphate have the least effect on electrolytic dissociation. This indicates that the ionization strength of phosphoric acid group is least affected by the neighboring groups.

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The effects of twister tube wihich seems very important for roller drafting of condensed slubbing are investigate.
A tester (Fig.1) has been designed to draft condensed slubbings by roller drafting type under various conditions of draft ration, ratio, ratchm false twister speed and thread angle θ (angle between slubbing and center of twister tube), and to measure the tension generated.
The reduction in weight percentage of the cendensed slubbing takes place within the drafting field, mainly in the proximity of the front roller inside the tube, and slightly at the back roller. (Fig.4_??_Fig.7) These two parts have less number of turns of false twist than in the other part. (Fig.8_??_Fig.9)
The efficiency of false twister tube is high at slow speed, and low at high speed. (Fig.10)

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In this paper, the effects of sodium lauryl sulfate on the mixture dyeing of nylon with monobasic dyes (C. I. Acid Orange 7, C. I. Acid Blue 43 and C. I. Acid Yellow 36) are considered.
To examine the dyeing properties of three acid dyes used in this experiment for nylon, the affinities of dye acid for nylon in mixture dyeing are obtained. The affinities of Acid Orange 7, Acid Blue 43 and Acid Yellow 36 for nylon at 95°C are 14.9, 13.8 and 15.8 Kcal/mol respectively.
The effects of sodium lauryl sulfate on the adsorption of each dye ion in mixture dyeing of Acid Orange and Acid Blue, and in mixture dyeing of Acid Yellow on Acid Blue are examined. The adsorption of each dye on nylon in mixture dyeing in presence of sodium lauryl sulfate is found to decrease as sodium laurryl sulfate in dye solution increases. This is considered to be due to the competition for dye sites on nylon betwwn lauryl sulfate ion and dye anions.

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High temperature pad-steam bleaching of cotton was experimented under the following conditions and the Hunter's whiteness W and DP of the bleached cotton were measured. The conditions: NaClO₂ 1_??_1.5%, pH 7_??_3.5, liquor ratio 1:1, temperature 110°_??_160°C, time 15 sec_??_20min. The results obtained are:
(1) The rate of bleaching decreases remarkably as the pH of the NaClO₂ solution increases, while the rate of depolymerization is influenced by the pH value not so severely as in the case of the rate of bleaching, Hence longer time is necessary for bleaching at higher pH, during which the depolymerization of the cotton proceeds remarkably. Consequently the bleaching must be made speedily by lowering the pH of the NaClO₂ solution to 3.5_??_5, then the depolymerization is tolerable.
(2) When a bleaching is made at 120°_??_110°C for 30_??_60 sec, using a 1.5% NaClO₂ solution at pH 3.6, W and DP were 92 and 1100 respectively, DP of the unbleached cotton being 1270.
It is conclude that a high temperature continuous pad-steam bleaching of cotton is possible under suitable conditons

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