Cellulose and non-cellulosic materials (total nitrogen, phosphorus, ash, etc.) were daily measured in order to make clear the changes in the chemical composition in lint during the growing process of cotton fiber, and the results were observed. Cotton variety used for this research was “Rikuchimen Kanno No.1”, a sort of upland cotton. The results obtained are summarized as follows.
1) Absolute weight of cellulose in lint increases linearly from the day in which the growth of wall thickness just begins, until the day in which boll openning just begins, and it is shown that cellulose is synthesized and deposited in lint on the same rate in this period.
2) Absolute weight of non-cellulosic materials shows the maximum weight during the period of the growth of lint elongation and rapidly decreases during the early period of the growth of wall thickness, and later shows constant value, and these non-cellulosic materials may take part in cellulose formation after beginning of the growth of wall thickness and lastly deposit inside wall of lumen.
3) The cellulose content of primary wall with tubular texture is about 19% of total cellulose, and remaining 81% of secondary wall with spiral texture shows evident micellar crystal structure and nearly runs parallel to fiber axis.
4) Further discussion on minor points is made concerning the formation of cellulose.

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The relation between the tension of warp yarn and the number of picks to the unit length is studied with a view to studying the operations of letting-off and taking-up by series of the experimental researches.
Tension of warp yarn is measured by the momentary total warp tension measuring method by appling the strain-gauge, and following three weaving tests are studied to make an easy comparison with the theoretical researches.
(a) With nylon filament (dia.=0.255mm) for warp yarn and brass wire (dia.=0.235mm) for weft yarn.
The following formula is obtained; where T′: tension of warp yarn when the reed beats the cloth-fell T₀: tension of warp yarn before the reed beats the cloth-fell D: number of picks to the unit length A₂, A′₂: constants
(b) With brass wire (dia.=0.233mm) for warp yarn and brass yarn (dia.=0.254mm) for weft yarn. The results obtained are similar to the above (a).
(c) With saran filament (360d) for warp yarn and saran filament (1, 000d) for weft yarn.
It is found that the tendency of experimental result nearly coincides with the calculated result of the theoretical formula; where μ: Frictional coefficient between warp and weft yarn β: Shedding angle x: Interlacing angle
The increased tension of warp yarn owing to the beating, T_c=T′-T₀, where T₀ and D are the functional factors. This formula was applied in solving the operation of letting-off and taking-up, but as T₀ changes with D no definite solution was obtainable.

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The relation between the traverse motion x=x(t) and the shape of a thread reeled up on the cylindrical reel, ξ=ξ(t) is given as follows
where, r: diameter of reel, ω₀: Angular velocity, so rω₀: reeling velocity, l: tangential length between reel and traverse bar.
By this equation we can obtain the gains i. e. the ratio of both amplitudes. So when the traverse motion x=x(t) is given, we can solve this equation.
Generally, when x=x(t) is given as the form of the Fourier series, we can obtain its gain as the sum of each gains. But in the proper assumptive cases, we can analyse some important motions approximately. Traverse limit, i. e. upper limit of ω/ω₀, depends upon the two factors, frictional cofficient between the surface of reeled thread and the thread, and yarn stiffness; the latter is negligible in this case, so we obtain the result as follows:
General determination of the sectional shape of thread layers, reeled on the reel surface, is very difficult, but in the case of S. H. M., it becomes:
but, this slightly different from that of the experimental result, because of the neglect of geometrical form factors of the thread.

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In order to study the distribution of component fibres in the yarn, a sample of the blended yarn was counted at cross-sections. It was found that the distribution of cotton and staple fibre is at random and it agrees with current nation entertained on the qualitative consideration. Further counts of blending irregularity indicated that the irregularity along the yarn was greater and nocorrelation between variance per cross-section and blend proportion was found.
It may be assumed from the foregoing that in this case the blending had taken place in the opening and picking process.

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We generalized master creep curves at several temperatures bashing upon the simple assumption for the temperature dependence of retarded elastic deformation of master creep curves and obtained a distribution function of retardation times.
Temperature dependence of some characteristic values for the generalization of master creep curves is also discussed.

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The synthesis of polyvinyl cyanoethyl ether by the reaction of polyvinyl alcohol with acrylonitrile vapour, in the presence of NaOH catalyst was studied, including effects of the pretreat-swelling by catalyst (0-5hrs.), amount of water and catalyst (H₂0/PVA wt. 0.1-2.5 and NaOH/PVA mol 0.01-0.34), time and temperauture of the reaction (0.5-18hrs. and 25-55°C) and atmospheric pressure in the reaction vessel (5-760mm Hg) on the rate of cyanoethylation. At a relatively higher temperature and catalyst concentration, a strikingly abnormal rate of cyanoethylation was observed. This may be due to the accompanying of the inverse reaction of cyanoethylation and the slight degree of hydrolysis of the cyano group.
Assuming the reaction velocities of the first order for each reaction of the cyanoethylation, decyanoethylation and hydrolysis and the different velocity constants between the crystalline and amorphous regions of polyvinyl alcohol, a theoretical equation for the rate of cyanoethylation is derived. Giving the value of 60% for the accessibility of polyvinyl alcohol and the appropriate values corresponding to the conditions of the reaction for each reaction velocity constant, this equation shows the comparable trend with the experimental results in the principal points.

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The new method of the crease resistant finish with picoline betaine hydrochloride as catalyst was reported. From these results, we found that this catalyst had the properties of good latent catalyst, gave the high stability to the resin solution and excellent uniform effects to the fabrics and determined the best conditions for the practical treatment.

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