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Volume 51, Issue 3
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1998 Volume 51 Issue 3 Pages e1
Published: 1998
Released on J-STAGE: October 27, 2009
JOURNAL FREE ACCESSDownload PDF (1569K) -
Part 3 : Analysis of Fabric Parameters in Bending Vibration and Features of Those by Various FabricsRuquan Zhang, Mitsuo Matsudaira1998 Volume 51 Issue 3 Pages T47-T51
Published: March 25, 1998
Released on J-STAGE: October 27, 2009
JOURNAL FREE ACCESS(1) The Theoretical equation of the amplitude decrease of the 1st step in bending vibration (=Δd1) derived in the former paper was explained more precisely. In the comparison between woven and knitted fabrics, Δd1 of knitted fabrics is larger and S1 (vibration duration period of the 1st step), S2 (vibration duration period of the 1 st step and the 2nd step) are smaller. Δd2 (amplitude decrease of the 2nd step) showed similar values in both fabrics. Δd1 of spun yarn fabrics is larger than that of filament yarn fabrics, and bending vibration stops sooner in spun yarn fabrics. Δd2 showed similar values in both fabrics. By cluster analysis, it was shown that a combination of the parameters; Δd1, S2, B is best for classifying spun or filament yarn fabrics, and that a combination of the parameters; Δd2, S1, 2HB is best for classifying wool, cotton or silk fabrics.View full abstractDownload PDF (3077K) -
Taro Nishimura, Tomoyuki Akai, Osamu Kakihana, Masashi Kamon1998 Volume 51 Issue 3 Pages T52-T58
Published: March 25, 1998
Released on J-STAGE: October 27, 2009
JOURNAL FREE ACCESSPermeability of soil-geotextile-soil multilayer system was measured by a geotextile permeability testing apparatus. Nonwoven geotextile, woven geotextile and woven geotextile of BCF yarn were used. Soil samples consist of Toyoura sand and a blended soil with Toyoura sand and Fukakusa clay.
The permeability of the system resulted in the filter layer created within the soil at the upstream side of the geotextile. The structure of this filter layer depended on the density and the pore size of the geotextile used. An additivity rule, therefore, could not be applied to the permeability of the multilayer system.
In the case of woven fabric used, the permeability increased with increasing pore size. For bigger pore size of the fabric the permeability kept a constant value. The quantity of the clay flowed out through the geotextile increased with increasing pore size of the geotextile. For bigger pore size of the fabric the quantity of the clay also kept a constant value. This fact revealed that the permeability of the system depended on the filter structure.
From the observation with BCF fabric, the geotextile which had many small pores of inter-fiber but bigger pores of inter-yarn indicated the excellence filtration.View full abstractDownload PDF (3168K) -
Part 4 : Core Yarn Detecting System by Air Pressure Variation[in Japanese], [in Japanese], [in Japanese], [in Japanese]1998 Volume 51 Issue 3 Pages T59-T63
Published: March 25, 1998
Released on J-STAGE: October 27, 2009
JOURNAL FREE ACCESSDrawing-in process on covering machines is so difficult and inefficient that its automation is especially hoped. However the automatic drawing-in system developed in order to improve drawing-in operation is not able to distinguish whether the core yarn is successfully drawn into the hollow spindle or not. So we developed a detecting system for fine Spandex, applying pressure variation in pipe flow caused by yarn behavior.
Results obtained are as follows :
(1) Pressure variation can check the presence of Spandex when it runs through, a small air flow pipe.
(2) This detecting system consists of a diaphragm type pressure sensor, a small pipe and a simple sequence program.
(3) The system can detect Spandex yarns from 30D to 420D that are widely used and too thin to sense even by manual operation. And it is confirmed that the system has practical utility.
(4) The system is installed on the automatic yarn drawing-in device. When the system distinguish the failure to draw Spandex into hollow spindles, the failed Spandex package is removed and drawing-in is again attempted with another package on the same spindle. In this way, yarn drawing-in is performed for all spindles on a covering machine continually and automatically.View full abstractDownload PDF (1823K) -
ZAKO Masaru, UETSUJI Yasutomo1998 Volume 51 Issue 3 Pages P150-P158
Published: March 25, 1998
Released on J-STAGE: October 27, 2009
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Shin UTSUNOMIYA1998 Volume 51 Issue 3 Pages P159-P166
Published: March 25, 1998
Released on J-STAGE: October 27, 2009
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TANIMOTO Toshio1998 Volume 51 Issue 3 Pages P167-P173
Published: March 25, 1998
Released on J-STAGE: October 27, 2009
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Norio FUKIAGE1998 Volume 51 Issue 3 Pages P174-P181
Published: March 25, 1998
Released on J-STAGE: October 27, 2009
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OHMORI Kazuhiro1998 Volume 51 Issue 3 Pages P182-P187
Published: March 25, 1998
Released on J-STAGE: October 27, 2009
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1998 Volume 51 Issue 3 Pages P190-P200
Published: March 25, 1998
Released on J-STAGE: October 27, 2009
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