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Volume 13, Issue 9
Displaying 1-12 of 12 articles from this issue
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Hiroshi Sobue1957 Volume 13 Issue 9 Pages 573
Published: September 10, 1957
Released on J-STAGE: November 28, 2008
JOURNAL FREE ACCESSDownload PDF (92K) -
(II) THE MEASURING METHOD OF MATURITY BY THE DIFFERENTIAL DYEING METHODYasuo Ono1957 Volume 13 Issue 9 Pages 574-579
Published: September 10, 1957
Released on J-STAGE: November 28, 2008
JOURNAL FREE ACCESSThe observation of maturing process and the measuring of maturity, of lint during the growing process of cotton fiber were carried out by differential dyeing method and the method is discussed from various points of view with aproposal for measuring method of maturity. The cotton variety used for this research was “Rikuchimen Kan-no No.I, ” a sort of upland cotton.
Relation between the maturity by differential dyeing method and that by microscope method, (percentage maturity) and then the advantage and disadvantage of both methods are discussed.View full abstractDownload PDF (540K) -
(V) THE ACETALIZATION OF POLYVINYL ALCOHOL WITH NOYL ALDEHYDENaofumi Nakamura1957 Volume 13 Issue 9 Pages 580-582
Published: September 10, 1957
Released on J-STAGE: November 28, 2008
JOURNAL FREE ACCESSThe acetalization of polyvinyl alcohol with nonyl aldehyde has been undertaken. Polyvinyl alcohol can be easily acetalized to maximum 86.5mol%, in homogeneous phase in benzene solution.
It is found that highly acetalized one is soluble in CCl4 and trichlor ethylene, with softening temperature of 30_??_40°CView full abstractDownload PDF (218K) -
(PART II) COAGULATING BATHSTakashi Tanabe, Hideo Nagao, Isao Okamura1957 Volume 13 Issue 9 Pages 583-590
Published: September 10, 1957
Released on J-STAGE: November 28, 2008
JOURNAL FREE ACCESSThe spinning tests were trade with the coagulating baths such as the coagulating liquids that had been used in the spinning of dimethylformamide solution of acrylonitrile polymer and the aqueous solution of potassium carbonate.
It was found that the selection of the conditions to form homogneous coagulation is important for the spinning process.
It is possible to use the aqueous solution of potassium carbonate as coagulating liquid.View full abstractDownload PDF (516K) -
(I) FINE STRUCTURE OF CELLULOSE (Part I)Osakazu Nakao, Yasuhiko Kurosawa, Nobuhiko Migita1957 Volume 13 Issue 9 Pages 591-596
Published: September 10, 1957
Released on J-STAGE: November 28, 2008
JOURNAL FREE ACCESSIn order to investigate the influence of fine structure on the alkali solubility curve of pulp, the hydrolized residues (crystalline region and crystalline region containning mesomorphous region) were prepared from linter pulp, rayon wood pulp and bleached sulfite paper pulp, by dilute acid hydrolysis for 30 minutes and 3 hours respectively, and their alkali solubilities were determined.
The degraded cellulose samples were prepared from linter pulp and rayon pulp by irradiation of ultra violet rays, and their alkali solubilities were also determined.
From the results obtained the influence of fine structure and degree of polymerization of pulp on the alkali solubility curve of pulp are discussed.View full abstractDownload PDF (455K) -
(II)FINE STRUCTURE OF CELLULOSE (Part II)Osakazu Nakao, Saisei Miyao, Nobuhiko Migita1957 Volume 13 Issue 9 Pages 596-600,591
Published: September 10, 1957
Released on J-STAGE: November 28, 2008
JOURNAL FREE ACCESSIn the previous paper the influence of fine structure of cellulose on the alkali solubility curve of pulp were reported. In the present paper linter pulp and rayon wood pulp were nitrated with two kinds of acid mixtures and then denitrated so that the degree of polymerization of cellulose falls little, and the alkali solubilities and distributions of lateral order were determined on the samples thus obtained.
From the results obtained further discussions are made on the influence of fine structure of the alkali solubility curve of pulp.View full abstractDownload PDF (394K) -
(I) STRESS RELAXATION IN NYLONIwao Matsumoto, Kinzo Ishikawa1957 Volume 13 Issue 9 Pages 601-606
Published: September 10, 1957
Released on J-STAGE: November 28, 2008
JOURNAL FREE ACCESSStress relaxation behavior of nylon (6 nylon) stretched under various degrees of elongation was measured in order to know the influence of the relative humidity and temperature. The data on relaxation were obtained under R. H. 8%, 33%, 55%, 75%, and in water at 25°C. The influence of the change of temperature at 25°C, 40°C, and 55°C under R. H. 55% and in water was further studied,
The values of E (stress/strain) obtained under various degrees of elongation, temperature, and R. H. were plotted for log t (see) and are shown in Fig. 2_??_Fig. 6, Fig. 8 and Fig. 9. It was found that the relaxation curve for nylon under various conditions could be approximated by the following.
where t is time, and E0, t0 is constant.
The results obtained are as follows.
1) Under the small elongation (2%), stress-relaxation behavior of nylon is much affected by R. H, and temperature.
2) In the low R. H., the high rate of stress relaxation is obtained under the 2% and 4% elongation.
3) In the high R. H. (including the tests in water) and under larger elongation, there is a small difference among the rates of stress relaxation.View full abstractDownload PDF (443K) -
(PART I) FORMULATION OF SHEAR MODULUS AND THE EFFECT OF TWIST ON STRUCTURE FACTOR OF A BUNDLE OF STAPLE FIBRESShigetake Kinoshita1957 Volume 13 Issue 9 Pages 607-612
Published: September 10, 1957
Released on J-STAGE: November 28, 2008
JOURNAL FREE ACCESSThe purpose of this research is to estimate the influence of elementary fibre properties on _??_ torsional elastic behaviour of sliver-like fibre system for the analysis of spinning mechanisms and for the prediction of yarn quality.
In this paper, using the principle of double elasticity theory which was previously discussed by the author, the shear modulus G of sliver-like fibre bundle (length L, radius R, sectional area A and density _??_) is derived as a function of fibre dimensions (length l, diameter b, density ρ and direction to sliver axis θ) and fibre properties (shear rigidity μf. Young's modulus εf, Poisson's ratio σ and coefficient of friction f), that is
Then, by the application of same method to torsional displacement of fibre in a bundle which are twisted by _??_ per unit length, the effects of amount of _??_ on structure factors L, R and _??_ of system are determined theoretically by the following:
where, E is Young's modulus, Σ is Poisson's ratio of untwisted sliver:
And S is applied tensile stress of sliver. If sliver is twisted with constant length, it may be put:S=1/2ER2_??_2.View full abstractDownload PDF (414K) -
(X) DETERMINATION OF TWIST OF PAPER YARNKuniichi Yamada1957 Volume 13 Issue 9 Pages 613-617
Published: September 10, 1957
Released on J-STAGE: November 28, 2008
JOURNAL FREE ACCESSIn the normal method (the untwisted method) the highly trained skill is required and yet exact results can hardly be expected in measuring twists of the yarn which is twisted by the heavier traveller, after about 50% moisture has been given to and permeated through the cut-material in an air-tight container for a few days, as in Report III.
In the present experiment is has been examined whether the simple methods, known as the twist measuring methods of spun yarn, had some utilities or not, when they were applied to the paper yarn.
And it has been made clear that the breaking method with 10cm between two clips is found fearable.
N1: Times of twists until a test piece is strained to be broken, after the piece, festened between two clips (the distance is L) has been twisted in the same direction as that of the test piece.
N2: Times of twists until a new piece is strained to be broken, the piece been twisted in the opposite direction, untwisted thoroughly and kept twisting on. and times of twists of yarn: N=(N2-N1)/2View full abstractDownload PDF (344K) -
(XI) THE EFFECT OF THICKNESS OF PAPER ON THE PROPERTIES OF YARNS AND ON THE RESULT OF RESIN TREATMENTKuniichi Yamada1957 Volume 13 Issue 9 Pages 617-622,613
Published: September 10, 1957
Released on J-STAGE: November 28, 2008
JOURNAL FREE ACCESSIn the paper manufacturing, the qualities, thickness, and width of cut of the papers from which the yarn is made, have been determined from the manufacturers' experiences.
In the present experiment the following two problems had been examined by the use of two kinds of paper of different thickness (102.09 and 122.51g/m2)
(1) Relation between the number of twists and the properties of yarns of 12_??_9 and 7′S
(2) Relation between thickness of the papers and effects obtained by the treatment of acid colloidal resin.
And the following results have been obtained.
(i) Strength and strength per unit area of two kinds of raw paper were Pa, pa; Pb, pb. Pa=pa×A, Pb=pb×B
However the sectional area A=B and pa=pb Therefore Pa=Pb
And when these two kinds of raw paper are twisted respectively, strength of the thinner raw paper is stronger, because of its higher adhesiveness.
(ii) No significant difference is observed in the effect of resin treatment.View full abstractDownload PDF (434K) -
Kenichi Tanabe, Kanji Matsubayashi1957 Volume 13 Issue 9 Pages 623-628
Published: September 10, 1957
Released on J-STAGE: November 28, 2008
JOURNAL FREE ACCESSIt is found that polyvinyl alcohol is changed into colored high molecular compounds keeping fiber form by acetalizing heat-treated fiber with some hydroxy-aromatic aldehydes and subsequently by coupling with diazonium compounds. In order to obtain the colored fiber resistant to boiling water, formalizing or benzalizing is generally necessary in addition to the acetalizing with hydroxyaromatic aldehyde. Though in hydroxy-aromatic aldehyde having electro-negative group, e. g. nitro-, carboxyl-, or bromo-group, directly attatched to the aromatic ring, the acetalization proceeds more easily than in hydroxy-aromatic aldehyde having no electro-negative group, in the color-developing due to coupling with diazonium compounds the fiber acetalized with the latter is better, even if the degree of acetalization is considerably lower. Particularly even the fiber acetalized with hydroxvnaphthaldehyde or resolcylaldehyde to several tenth mole per cent is developed in heavier shades. By changing the hydroxy-aromatic aldehyde and particularly aromatic amine, red, orange. yellow, brown, purple, and black shades are obtained, but blue and green are not.View full abstractDownload PDF (442K) -
Hisashi Uedaira1957 Volume 13 Issue 9 Pages 629-634
Published: September 10, 1957
Released on J-STAGE: November 28, 2008
JOURNAL FREE ACCESSDownload PDF (483K)
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