Journal of the Textile Machinery Society of Japan

Lateral Deformation of Sliver in Roller, Drafting Zone

Masaaki Okamura, Shinya Kurosaki, Fujio Konda, Tatsuharu Ikeguchi

1992 Volume 38 Issue 1 Pages 1-4
Published: 1992
Released on J-STAGE: October 24, 2006

DOIhttps://doi.org/10.4188/jte1955.38.1

JOURNAL FREE ACCESS

Show abstractHide abstract

The drafting force has been only the way to evaluate the aspects of roller drafting up to now. The lateral deformation (LD) of sliver would be newly proposed as a significant expression of the drafting behavior adding to the conventional drafting force.
Generally, the LD curve shows a high negative correlation to both the drafting force curve and the irregularity curve of output sliver. The mean, the coefficient of variation and the power spectrum of the LD curves were calculated, and the effects of the drafting conditions on these three factors were discussed. It becomes clear that the coefficient of variation of the LD shows the same tendency as that of the drafting force on the drafting conditions. The LD could be considered as one of the most important expressions to show the roller drafting aspects.

View full abstract

Download PDF (400K)
Vibrational Property of Filament Woven Fabrics Based on Shear Deformation

Part 1: Effect of Fabric Tension

Mitsuo Matsudaira

1992 Volume 38 Issue 1 Pages 5-11
Published: 1992
Released on J-STAGE: October 24, 2006

DOIhttps://doi.org/10.4188/jte1955.38.5

JOURNAL FREE ACCESS

Show abstractHide abstract

In order to study basic phenomenon of dynamic drape of filament woven fabrics, dependency of vibrational property of woven fabrics based on shear deformation on fabric tension was investigated precisely in relation to shear property of the woven fabrics. The shear vibration of fabric dampled linearly with time in a small shear deformation range (<0.035rad) under all the fabric tensions examined here (0.1-3.5kg/m). This means the vibration damps by inter-fiber and/or inter-yarn friction in the woven fabrics. Optimum range of the fabric tension where the shear vibration continued the longest was recognized to exist experimentally and theoretically. The damping ratio correlated well with a combined characteristics of shear property measured by KES system; 2HG₀/_??_G₀, and this could be considered as a parameter of shear vibrational property of woven fabrics. Vibration of silk woven fabrics continued longer than that of the similar type of silk-like polyester woven fabrics.

View full abstract

Download PDF (852K)
Development of a New Evaluation System of Frictional Static Charge

Part 3: Influence of Insulation and Testpiece-size on Frictional Static Charge and its Decay Rate

Masao Matsui, Kazuo Okamoto, Takamitsu Kashiwamura

1992 Volume 38 Issue 1 Pages 12-20
Published: 1992
Released on J-STAGE: October 24, 2006

DOIhttps://doi.org/10.4188/jte1955.38.12

JOURNAL FREE ACCESS

Show abstractHide abstract

The influence of insulation and testpiece-size on the frictional charge have been investigated with various kinds of fabric by the KB-system. It was found that the frictional charge and the decay rate are significantly influenced by both insulation and testpiece-size, while the frictional charge and the decay rate of the fabric, in which grounded electro-conductive filament is contained, are not influenced by the testpiece-size.

View full abstract

Download PDF (1679K)