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

Stochastic Geometry of Two-Dimensional Fiber Assemblies

Part 4 : Hydraulic Radius Distribution of Polygons Formed by Random Lines

Kunihiro Yamada, Akira Horikawa

1986 Volume 39 Issue 5 Pages T67-T75
Published: May 25, 1986
Released on J-STAGE: June 17, 2010

DOIhttps://doi.org/10.4188/transjtmsj.39.5_T67

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Calculations have been made for the hydrauric properties of the two dimensional random oriented fibrous filters. If the volumetric flow passing perpendicularly through a pore may be assumed to be proportional to the fourth power of the hydraulic pore radius, the total flow will be proportional to the fourth order moment of the hydraulic radius distribution of polygonal pores.
Theoretical expressions of the hydraulic radius distribution and its fourth order moment are derived through a stochastic consideration. The portion, K (n), of the volumetric flow through all n-sided polygonal pores in the total amount of flow is computed as K (3) =0.0102, K (4) =0.1550, K (5) =0.3410, K (6) =0.2973, K (7) =0.1420, K (8) =0.0435, K (9) =0.0093, K (10) =0.0015.
Using a Monte Carlo technique the distribution of hydraulic radii, perimeters and areas are obtained, the results of which agree well with the theoretical ones.

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A Statistical Analysis of Subjective and Objective Methods of Evaluating Fabric Handle

Part II Relationships Between Subjective and Objective Measurements

A.E. Stearn, R.L. D'Arcy, R. Postle, T. Mahar

1986 Volume 39 Issue 5 Pages T76-T85
Published: May 25, 1986
Released on J-STAGE: October 27, 2009

DOIhttps://doi.org/10.4188/transjtmsj.39.5_T76

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The data obtained from a survey of the fabric handle preferences of panels of judges drawn from the textile and clothing industries of Japan, Australia, India, New Zealand and the United States of America are compared with data provided from objective mechanical measurements.
The model used takes into account the fact that judges may differ in their assessment in non-random ways, for example, some judges may prefer thicker fabrics, and gives a picture of how objective measurements may perform not only to explain, but also to predict how individual judges perform .
Although it is demonstrated that a substantial amount of individual subjective handle assessment can be explained by mechanical test parameters, predictions of handle assessment by Australian judges compared with their actual assessments were generally poorer when based on objective data, rather than subjective data. The implication of this is that the set of mechanical measurements used in the analysis did not contain all the necessary information to predict fabric handle preference.

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Variation of Fabric Mechanical Properties Related to Handle During Chemical Aftertreatments

Part 1. Effect of Textile Bleaching on Mechanical Properties of Cotton Fabrics

Isamu Hashimoto

1986 Volume 39 Issue 5 Pages P181-P188
Published: May 25, 1986
Released on J-STAGE: October 27, 2009

DOIhttps://doi.org/10.4188/transjtmsj.39.5_P181

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In this paper, the effect of textile bleaching, i. e., desizing, scouring and bleaching, on the mechanical properties of cotton fabrics related to handle has studied.The fabric mechanical properties has measured by the KES-F system. The results are summarized as follows :
(1) The mechanical properties has changed remarkably by the desizing process. The values of bending rigidity (B), bending hysteresis (2HB), shear stiffness (G), shearing hysteresis (2HG and 2HG₅), tensile linearity (LT) and tensile resilience (RT) have remarkably been decreased by the desizing, but the mean value coefficient of friction (MIU) has been increased.
(2) The mechanical properties of the desized fabrics has been changed by the desizing agents as an enzyme and an oxidizer. The values of B, 2HB, G, 2HG and 2HG₅ for the enzyme process are lower than that of the oxidizer process.
(3) After the desizing process, the mechanical properties has been changed gradually by the scouring and bleaching process. The values of B, 2HB, G, 2HG, 2HG₅, MIU and RC have been increased considerably, but the value of WC has been decreased by these process.

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Variation of Fabric Mechanical Properties Related to Handle During Chemical Aftertreatment

Part 2. Effect of Mercerising on Mechanical Properties of Cotton Fabrics

Isamu Hashimoto

1986 Volume 39 Issue 5 Pages P189-P195
Published: May 25, 1986
Released on J-STAGE: October 27, 2009

DOIhttps://doi.org/10.4188/transjtmsj.39.5_P189

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In this paper, the effect of mercerising on the mechanical properties of cotton fabrics related to handle has studied. The fabric mechanical properties have been evaluated by the KES-F system. The results are summarizad as follows :
(1) The bending properties (B and 2HB), compressing resilience (RC) and tensile resilience (RT) has considerably increased by the mercerising process, but the shearing histeresis has been decreased remarkably.
(2) The grey mercerised fabric has decreased remarkably in the values of the bending (B and 2HB) and shearing properties (G and 2HG) in comparison with the normal mercerised fabrics.

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[title in Japanese]

[in Japanese], [in Japanese], [in Japanese]

1986 Volume 39 Issue 5 Pages P196-P200
Published: May 25, 1986
Released on J-STAGE: October 27, 2009

DOIhttps://doi.org/10.4188/transjtmsj.39.5_P196

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Practical Weaving Lecture

Weaving Design Part 4

S. Takematsu

1986 Volume 39 Issue 5 Pages P201-P209
Published: May 25, 1986
Released on J-STAGE: October 27, 2009

DOIhttps://doi.org/10.4188/transjtmsj.39.5_P201

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