Sen'i Gakkaishi

INVESTIGATION ON INTER-FIBRE FRICTION IN FIBER SYSTEM

PART VII. ON THE KINETIC THEORY OF DRAFTING SLIVER

Shigetake Kinoshita, Toshiharu Takizawa

1961 Volume 17 Issue 3 Pages 217-220
Published: March 10, 1961
Released on J-STAGE: November 28, 2008

DOIhttps://doi.org/10.2115/fiber.17.217

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In this study the following expreiments were carried out. Fullness (ω₀=1-ε₀) effect on withdrawal force F_s of a single fiber from bundle (eq. 7.1), effect of withdrawal speed V (eq. 7.2), and relative velocity of stick-slip motion v-<v> (eq. 7.3) were observed in the cases of various fiber bundles.
On the basis of these experimental results, the expression of capacity C (eq. 7.9), transportability pressure u (eq. 7.10), resistance R (eq. 7.11), and self conductance L (eq. 7.12) for the fibre current I (eq. 7.5) in the drafting zone were defined by Boltzmann's average equation (7.8).
From these treatments, following results were obtained:
(1) Time dependency of fiber currents I in drafting zone is given by equation (7.14) and (7.17)
(2) Spectrum density G_I(ω) and auto-correlation coefficient ρ(τ) of sliver irregularity were given in (7.15)_??_(7.19).
(3) When L=0, the equation of fibre motion under drafting is reduced to the heat conduction or diffusion equation (7.21) and if L_??_0, to the damping wave equation (7.23).

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ON THE BULK COMPRESSIONAL CHARACTERISTICS OF FIBER MASS

(I) TESTING APPARATUS AND SAMPLE PREPARATION

Masahiko Takikawa, Kazuo Kawamura

1961 Volume 17 Issue 3 Pages 221-225
Published: March 10, 1961
Released on J-STAGE: November 28, 2008

DOIhttps://doi.org/10.2115/fiber.17.221

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An improved method to measure the bulk compression behavior of fiber mass is studied.
Compression experiments are carried out with Instron Tensile Tester equipped with apparatus designed and made in our laboratory which consists of a compression stand and a support table. By the aid of this apparatus the effective area of each sample mass is kept constant during a compression test.
In order to secure the reproductibility of tests the method of sample preparation is investigated.

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STUDIES ON RABBIT FIBRES

(XXXXI). RELATION BETWEEN CARROTTING AND FELTING

Sakio Ikeda

1961 Volume 17 Issue 3 Pages 226-234
Published: March 10, 1961
Released on J-STAGE: November 28, 2008

DOIhttps://doi.org/10.2115/fiber.17.226

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M. Harris and his colaborators studied the shrinkage of wool top and they state that the larger the shrinkage the larger the resilience R_s. This result is opposite to author's result obtained on carroted fur (XXXX). The contradiction may be explained from the following relations, when the systine of a modified fur is non-broken the larger the relative work of the elongation E_r the larger is the R_s, and when the systine is broken as the carroted fur the larger the E_r the smaller is the R_s. Therefore, the relations between E_r and R_s of the generally modified and carroted are opposite, but the relations between feltability and E_r of both cases showed a same tendency. Therefore the physical property of the more generally connected to feltability is the E_r rather than R_s.

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STUDIES ON THE FIBROUS ACETYLATION OF COTTON

(III) SOME PROPERTIES OF ACETYLATED COTTON

Waichiro Tsuji, Ryozo Kitamaru, Masazo Imai

1961 Volume 17 Issue 3 Pages 235-242
Published: March 10, 1961
Released on J-STAGE: November 28, 2008

DOIhttps://doi.org/10.2115/fiber.17.235

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Various properties of acetylated cotton, which have been prepared by the method reported in our previous papers were examined in detail. Properties examined are as follows: tensile properties, water and moisture absorption, specific gravity, microscopic structure, thermal and electric properties, abrasion resistance, weathering resistance, resistance to acid, flammability, dyeability, shrinkage by water boiling, soiling and soil removal, etc.

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STUDIES ON ACRYLIC FIBER

(XX) THE EFFECT OF SOLVENT CONTENT IN THE COAGULATION BATA COMPRISING SOLVENTS-WATER UPON THE FILAMENT FORMATION (XXI) ON THE SPINNING IN THE BATH HAVING CRITICAL BATH COMPOSITION

Masao Takahashi, Masamoto Watanabe

1961 Volume 17 Issue 3 Pages 243-252
Published: March 10, 1961
Released on J-STAGE: November 28, 2008

DOIhttps://doi.org/10.2115/fiber.17.243

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STUDIES ON THE CYANOETHYLATED VISCOSE-RAYON

(I) ON THE CYANOETHYLATED CELLULOSE XANTHATE (II) THE FINE STRUCTURE OF THE CYANOETHYLATED CELLULOSE FIBER AND THE REACTIVITY OF THIS FIBER TO MELAMINE-RESIN

Mikiharu Yajima, Ichizo Inoue

1961 Volume 17 Issue 3 Pages 253-262
Published: March 10, 1961
Released on J-STAGE: November 28, 2008

DOIhttps://doi.org/10.2115/fiber.17.253

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STUDIES ON THE DYEABILITY OF VINYLON

(III) ON THE UNUSUAL BEHAVIORS IN DYEING OF VINYLON

Akihumi Nasuno, Kenichi Tanabe

1961 Volume 17 Issue 3 Pages 263-272
Published: March 10, 1961
Released on J-STAGE: November 28, 2008

DOIhttps://doi.org/10.2115/fiber.17.263

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Further experiments on the unusual behaviors in dyeing of vinylon described in the previous papers were carried out. In the dyeing with a direct dye, Congo Red, the curve of dyeing rate in rayon has a well-defined equilibrium and the equilibrium value is decreasing with increased dyeing temperature. But vinylon shows unusual behaviors differing from the cellulosic fiber. In vinylon no distinct dyeing equilibrium is observed and the approximate equilibrium value increases with elevated temperature. On the other hand, in the dyeing with a disperse dye, Diacelliton Fast Brilliant Blue BF, vinylon shows a similar behavior to cellulose acetate and no unusual behavior is detected. Vinylon has a distinct dyeing equilibrium and the equilibrium value decreases with higher temperature.
An explanation on the dyeing behaviors of vinylon would be that the acetal groups, which have affinity to disperse dye, are in the amorphous parts and are always accessible to the dye, but the hydroxyl groups are in the crystalline and the amorphous parts, and amounts of the hydroxyl groups accessible to direct dye vary by dyeing conditions.

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THE STUDY ON α-HALO ACRYLIC POLYMERS

(I) THE SYNTHESIS OF METHYL α-CHLOROACRYLATE AND ITS COPOLYMERIZATION WITH VINYLIDE

Yoichi Yamada, Seizo Okamura, Shigeru Kawada

1961 Volume 17 Issue 3 Pages 273-276
Published: March 10, 1961
Released on J-STAGE: November 28, 2008

DOIhttps://doi.org/10.2115/fiber.17.273

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Various experiments have been made on α-chloroacrylate polymers for improvement in their heat stability and mechanical properties. A series of studies made by Marvel on α-halo acrylate polymer showed many facts that its structure is mostly of “head to tail” one (U. S. Patent 2, 379, 104., ) Using the marvel method the most suitable conditions for synthesizing Me α-chloroacrylate was sought.
Copolymerization of α-chloroacrylate with vinylidene chloride are made and the monomer reactivity ratios are calculated. These values are found nearly equal to those calculated from the Q-e scheme.

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[title in Japanese]

[in Japanese]

1961 Volume 17 Issue 3 Pages 277-283
Published: March 10, 1961
Released on J-STAGE: November 28, 2008

DOIhttps://doi.org/10.2115/fiber.17.277

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[title in Japanese]

[in Japanese]

1961 Volume 17 Issue 3 Pages 284-289
Published: March 10, 1961
Released on J-STAGE: November 28, 2008

DOIhttps://doi.org/10.2115/fiber.17.284

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