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Volume 33, Issue 10
Displaying 1-7 of 7 articles from this issue
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Kenji Kamide, Toshihiko Matsui, Kunihiko Okajima, Sei-ichi Manabe1980 Volume 33 Issue 10 Pages T111-T117
Published: October 25, 1980
Released on J-STAGE: February 12, 2010
JOURNAL FREE ACCESSAn attempt was made to produce a new cellulose fibers, referred to as “DCP fibers” hereafter, from the tenary mixture of Dimethylformamide (D) /Chloral (C) /Pyridine (P) by the wet-spinning method. The suitable spinning conditions, including the solvent composition, the polymer concentration and coagulating media, have experimentally been established. The molecular and crystalline structures, the viscoelastic and mechanical properties of the DCP fibers were determinad from infra-red spectra, X-ray diffraction patterns, dynamic loss tangent (tan δ) -temperature relations and stress-strain curves, in comparison with those of commercially available regenerated cellulose fibers, i.e., viscose and cuprammonium rayon fibers. The DCP fibers are completely regenerated cellulose with the crystal form II and having larger crystal size than commercial rayon fibers. The tanδ-temperature curves of DCP fibers show a new αa peak at 280°C and the dynamic elasticity also decreases at above 280°C, suggesting that an amorphous structure of DCP fibers is different from that of viscose and cuprammonium rayon fibers. The DCP fibers have similar tensile properties as those of cuprammonium rayon fibers.View full abstractDownload PDF (3501K) -
Part 1 : Falling Behaviors of a Slender BodyAkira Horikawa, Kunji Chiba, Kenzo Nishitani, Toru Ueshima1980 Volume 33 Issue 10 Pages T118-T126
Published: October 25, 1980
Released on J-STAGE: October 27, 2009
JOURNAL FREE ACCESSThe motion of fibers in a fluid is a fundamental phenomenon for the textile technology. This paper deals with a slender body as a simplest model of a single fiber. The motion of a slender body falling in the still liquid has been theoretically analyzed. And the falling behaviors of the slender body in the still water have been investigated by the numerical calculation. The calculated results have been compared with the experimental results.
The results are as follows :
(1) A slender body, which begins to fall in vertical position, slowly rotates its position into horizontal. It accelerates the horizontal speed until it inclines to 4050 degrees to the vertical.Thereafter, however, a slender body decelerates its horizontal speed. Finally it approaches horizontal position asymptotically and it will not move horizontally and will vertically fall at the constant speed.
(2) A slender body accelerates its angular velocity until it inclines to 1020 degrees to the vertical for calculated result (about 30 degrees for experimental result). However it decelerates its angular velocity thereafter.
(3) The tendency of the falling behaviors of the slender body obtained by the numerical calculation agrees well with experimental results.View full abstractDownload PDF (2006K) -
Part 5 : The Characteristics of Handling of Japanese Traditional Crepe FabricsHidetoshi Nakata, Miyuki Egawa1980 Volume 33 Issue 10 Pages P503-P510
Published: October 25, 1980
Released on J-STAGE: October 27, 2009
JOURNAL FREE ACCESSA variety of Japanese traditional crepe fabrics, Hitokoshi chirimen, were made of different weft and warp yarns for experiments to establish the most suitable weaving conditions. The relationship have been analyzed between design factor and basic physical properties, crimp shape, fabric hand and end-use performances. The following desirable factors for design of crepe fabrics have been obtained from experiments.
(1) The percentage of warp yarns shall be 4548%,
(2) The coefficient of twists shall be 47 00053 000,
(3) Considering the fineness or roughness of the crimp size, the number of twists shall be 3 0003 600 tpm for Hitokoshi chirimen and 2 4002 800 tpm for Kodai chirimen.
(4) Considering the degree of crimping ability, the shrinkage of fabrics shall be 0.300.35.
(5) Considering the characteristics of fabric hand, the cover factor of weft direction shall be. 13.0∼14.0.View full abstractDownload PDF (866K) -
Isamu Hashimoto, Akira Ono, Ryoko Ida1980 Volume 33 Issue 10 Pages P511-P516
Published: October 25, 1980
Released on J-STAGE: October 27, 2009
JOURNAL FREE ACCESSIn this paper, the colourimetric behavior of the dyed textile materials has been studied on cotton and silk dyeings. The colour character of cotton dyed with synthetic dyes, i.e., vat, direct and azoic dyes, and silk dyed with natural dyes are numerically expressed according to the system of the DIN and Rabe's θ value.The colour behavior differes among different hues and kinds of dyes. In the natural dyes, there are difference in the colour dem anor compared with that of the synthetic dyes in a solid hue.View full abstractDownload PDF (680K) -
S. Yoneji1980 Volume 33 Issue 10 Pages P517-P524
Published: October 25, 1980
Released on J-STAGE: October 27, 2009
JOURNAL FREE ACCESSDownload PDF (962K) -
(2) Imitation GauzeM. Shirane1980 Volume 33 Issue 10 Pages P525-P530
Published: October 25, 1980
Released on J-STAGE: October 27, 2009
JOURNAL FREE ACCESSDownload PDF (5913K) -
[in Japanese], [in Japanese]1980 Volume 33 Issue 10 Pages P535-P537
Published: October 25, 1980
Released on J-STAGE: October 27, 2009
JOURNAL FREE ACCESSDownload PDF (420K)
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