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Volume 49, Issue 12
Displaying 1-9 of 9 articles from this issue
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Ikuya Miyamoto, Toshihiko Matsui, Masatoshi Saito, Kunihiko Okaiima1996 Volume 49 Issue 12 Pages T305-T312
Published: December 25, 1996
Released on J-STAGE: February 12, 2010
JOURNAL FREE ACCESSIn order to disclose the structure of the gel prepared from cellulose-cuprammonium solutions (CAS) and its formation mechanism, we determined the phase diagram of the cellulose-CAS system and investigated viscoelastic properties of the system and change of the cellulose-CAS complex during gelation.
The results are as follows : 1) Cellulose-CAS system at 40°C takes three phases, cellulose solution, gel, and soliddepending on the composition of the system. 2) The cellulose-CAS system with specific compositions occursgelation with an increase of temperature due to the partial distraction of chelate of cellulose-cuprammoniumcomplex which leads to formation of intermolecular hydrogen bondings of cellulose molecules. 3) The gelationalso occurs by adding of water and sodium hydroxide solution to the system. 4) By the water, the gel with lowelasticity is obtained by the same mechanism as an elevation of the temperature, while the alkali solution givesthe gel with very high elasticity because of the formation so called Norman compound.View full abstractDownload PDF (3369K) -
Ryuzo Oinuma, Ikuo Narisawa, Kiyohito Koyama1996 Volume 49 Issue 12 Pages T313-T323
Published: December 25, 1996
Released on J-STAGE: February 12, 2010
JOURNAL FREE ACCESSThe mechanism of the end breakage due to knots (a weaver's knot and a fisherman's knot in the 1x1 rib knitting zone using a combed cotton yarn c30s/1cotton count) is investigated in detail, using a high speed video camera. The results obtained are as follows :
(1) It clarifies that the end breakage due to knots in the 1 x 1 rib knitting zone occurs in the following three steps :1) jam of knots on a cylinder needle-hook, 2) increase in the yarn tension, 3) end breakage due to knots.
(2) The end breakage due to an air-splice in the 1 x 1 rib knitting zone is not occurred under every knitting condition.
(3) The rate of jammed knots, the end breakage rate for jammed knots and that for knots increase with the increase of the depth of stitch draw, the input tension and the take-down weight for any knot.
(4) The rate of jammed knots, the end breakage rate for jammed knots and that for knots due to a fisherman's knot are always more than these due to a weaver's knot under every knitting condition.View full abstractDownload PDF (4708K) -
Mitsuo Matsudaira, Zhang Ru Quan1996 Volume 49 Issue 12 Pages T324-T332
Published: December 25, 1996
Released on J-STAGE: October 27, 2009
JOURNAL FREE ACCESSIn order to evaluate beautiful appearance of clothes objectively at the final end, vibrational phenomena of fabric based on bending deformation are investigated precisely and vibrational parameters which show features of vibrational damping properties of fabric are proposed. Following conclusions were obtained : Bending vibration of fabric damped linearly with time in two steps irrespective of fiber material and yarn and/or fabric structure until the amplitude becomes approximately 1/5 of the initial amplitude. This means viscoelastic effect in the fabric is neglected in the bending vibration. Frictional effect in the fabric can be divided into two parts, namely, inter-yarn friction and inter-fiber friction. In the proposed vibrational parameters, amplitude decreaseand the 1st linear-line, Δ d1 is related to pure bending property and inter-yarn friction. Amplitude decrease at the 2nd linear-line, Δ d2 is concerned with yarn structure and inter-fiber friction. Vibration duration time at the 1st step, S1 is the point at which major frictional effect changes from inter-yarnto inter-fiber friction.Total vibration duration time, S2 is related to pure bending property and fiber assembly structure.View full abstractDownload PDF (876K) -
Ikuya Miyamoto, Masatoshi Saito, Takeshi Aoyagi, Hideo Toyoshima1996 Volume 49 Issue 12 Pages T333-T338
Published: December 25, 1996
Released on J-STAGE: October 27, 2009
JOURNAL FREE ACCESSDownload PDF (750K) -
1996 Volume 49 Issue 12 Pages P562-P564
Published: December 25, 1996
Released on J-STAGE: October 27, 2009
JOURNAL FREE ACCESSDownload PDF (317K) -
H. Kiyokawa, T. Matsuzaki1996 Volume 49 Issue 12 Pages P565-P569
Published: December 25, 1996
Released on J-STAGE: October 27, 2009
JOURNAL FREE ACCESSDownload PDF (5528K) -
K. Numata1996 Volume 49 Issue 12 Pages P570-P575
Published: December 25, 1996
Released on J-STAGE: October 27, 2009
JOURNAL FREE ACCESSDownload PDF (4784K) -
N. Kiyoshima1996 Volume 49 Issue 12 Pages P576-P580
Published: December 25, 1996
Released on J-STAGE: October 27, 2009
JOURNAL FREE ACCESSDownload PDF (4384K) -
H. Yabushita1996 Volume 49 Issue 12 Pages P581-P586
Published: December 25, 1996
Released on J-STAGE: October 27, 2009
JOURNAL FREE ACCESSDownload PDF (4535K)
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