Sen'i Kikai Gakkaishi (Journal of the Textile Machinery Society of Japan)

Process Analysis of “Gara-bo” Spinning

Yo-ichi Matsumoto, Kouichiro Toriumi, Atsuo Konda, Kazuhisa Harakawa

1993 Volume 46 Issue 10 Pages T215-T225
Published: October 25, 1993
Released on J-STAGE: October 27, 2009

DOIhttps://doi.org/10.4188/transjtmsj.46.10_T215

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Throstle spinning, “Gara-bo” Spinning, is one of the spinning methods. The stuffer tube charged with the rawmaterial is a main part of the spinning process, and throstle-spun yarn is produced by repeating the rotation and the vertical motion of the stuffer tube. Two essential motions of the stuffer tube and the subsequent changes in the twist level of the yarn produced by those motions were analysed. In order to clarify the characteristics of the yarn irregularity, the effects of the stuffer-tube motion on the yarn count and the twist level of the yarn were observed and discussed. It was shown that the yarn formation and the thickness variataion in the throstle-spun yarn was determined by the relation between the number of gripped fibers and the twist level of the yarn in the vertical motion of the stuffer tube.

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Compressional Properties of Fiber Assemblies

Part 1 : Parametric Representation of the Compressional Curves of Fabrics

Mitsuo Matsudaira, Qin Hong

1993 Volume 46 Issue 10 Pages T226-T231
Published: October 25, 1993
Released on J-STAGE: October 27, 2009

DOIhttps://doi.org/10.4188/transjtmsj.46.10_T226

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As the first step in a series of studies on the compressibility of fiber assemblies, here were sought a small number of parameters which can represent reasonably the compression and decompression (recovery) curves of fabrics. The followings were obtained : the compression has three characteristic stages, in the first and third of which linear approximations are valid, and in the second of which exponential ones valid ; in the recovery, the stress decays first linearly and then exponentially to arrive finally at zero leaving a strain which does not vanish instantaneously ; the increasing rate of stress in the second stage of compression may be related to fabric structure, friction between fibers and/or yarns ; the decreasing rate in the second region of recovery may be related to ability with which fibers and yarns can regain their original states against the mutual frictional restraint ; these two rates play dominant roles in the whole process. An analysis of principal component, which was done on the parameters characterizing these stages for various sample fabrics, suggests that the two principal components are representative of almost all information on the compressibility, and that first of them may be related to the compressive compliance and softness, and the second to the compressive rigidity and recoverablity.

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Microbial Degradability of Commodity Synthetic Polymer

K. Tomita

1993 Volume 46 Issue 10 Pages P379-P383
Published: October 25, 1993
Released on J-STAGE: October 27, 2009

DOIhttps://doi.org/10.4188/transjtmsj.46.10_P379

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The Current Flame-retardant Fibers

Y. Tanaka

1993 Volume 46 Issue 10 Pages P384-P389
Published: October 25, 1993
Released on J-STAGE: February 12, 2010

DOIhttps://doi.org/10.4188/transjtmsj.46.10_P384

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The Present and Future of Air Filter Technology

T. Fukuda, M. Miyake, T. Kobayashi

1993 Volume 46 Issue 10 Pages P390-P396
Published: October 25, 1993
Released on J-STAGE: October 27, 2009

DOIhttps://doi.org/10.4188/transjtmsj.46.10_P390

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Relation between Environment and Fiber (Part1)

H. Uejima

1993 Volume 46 Issue 10 Pages P397-P406
Published: October 25, 1993
Released on J-STAGE: October 27, 2009

DOIhttps://doi.org/10.4188/transjtmsj.46.10_P397

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