Sen'i Gakkaishi
Online ISSN : 1884-2259
Print ISSN : 0037-9875
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Volume 63, Issue 5
Displaying 1-9 of 9 articles from this issue
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Column
Commentation
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Transactions
  • Detergency of Electrolysis Water in Laundering
    Tetsuya Takahashi, Yuji Aso, Tatsuyuki Yamamoto
    2007 Volume 63 Issue 5 Pages 109-116
    Published: 2007
    Released on J-STAGE: June 10, 2007
    DOIhttps://doi.org/10.2115/fiber.63.109
    JOURNAL FREE ACCESS
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    The detergency of electrolysis water in laundering was studied. First, contact angle with cellophane and PET films was measured. In both films, the contact angle decreased with increasies in the pH of electrolysis water. Electrolysis water of pH 11 was absorbed nearly completely by cellophane in 30 minutes. In addition, various kinds of water were examined for water absorption by fabrics. The absorption rate of electrolysis water of pH 11 was more rapid than other kinds of water. It was found to possess very high permeability into the fabrics.
    Artificial soiled fabrics were laundered in various kinds of water. The result revealed that electrolysis water of pH 11 showed high detergent efficiency for such hydrophilic materials such as cotton, silk, and wool that were artificial soiled fabrics. Furthermore, when sodium dodecylbenzenesulfonate, a surfactant, was added to launder them, detergent efficiency was further improved by the addition of sodium dodecylbenzenesulfonate. Surfactant decomposition by active oxygen formed was not inferred to take place much in laundering in electrolysis water from this finding.
    In addition, a test was performed to examine soil redeposition in cotton and polyester fabrics with water-soluble and oil-soluble soil. It was found difficult to redeposit soil in them when laundering them in electrolysis water of pH 11. However, although the cotton and polyester fabrics were not found much damaged after laundering, the wool fabric was observed to be damaged when electrolysis water (pH = 11) was used. The extent of damage was about the same as that found when a sodium hydroxide solution (pH = 11) was used instead.
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  • Color Prediction of Union Fabrics Considering Mutual Reflection between Yarns-A New Color Prediction Model Using Apposed Color Mixture Theory-
    Takeshi Kiyosawa, Jiaming Zheng, Masayuki Takatera, Yoshio Shimizu, Yo ...
    2007 Volume 63 Issue 5 Pages 117-122
    Published: 2007
    Released on J-STAGE: June 10, 2007
    DOIhttps://doi.org/10.2115/fiber.63.117
    JOURNAL FREE ACCESS
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    Based on the apposed mixing color theory, from the point of the effect of mutual reflection between warp and weft yarns considering the area ratio of warp and weft yarns and the difference between the spectral reflectance of warp and weft yarns, a new color prediction model for union fabrics was proposed. The experiments were carried out for sixty pieces of union fabrics, which had been woven with each two kinds of color yarns selected from thirteen kinds of color yarns. The experiment results were compared with the predicted values with reflection effect and the predicted values without reflection effect. The experiment results showed good agreement with the predicted values with reflection effect based on the new model. It was proved that the new model was effective and precise to predict the surface color for union fabrics.
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  • Effects of Auxiliaries on Acid Dyeing of Shrink-Proofed Wool Fibers
    Takayuki Okabe, Daisuke Kasai, Nayu Kobayashi, Toshihiko Shiina, Mami ...
    2007 Volume 63 Issue 5 Pages 123-129
    Published: 2007
    Released on J-STAGE: June 10, 2007
    DOIhttps://doi.org/10.2115/fiber.63.123
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    The sorption behavior of an acid dye for shrink-proofed wool fibers, which were treated by means of three methods, Kroy, DCCA, and THPP (phosphorus compound) method, was investigated, to be compared with that of untreated fibers. The sorption isotherms for the wool fibers were determined and analyzed using dual sorption mechanism in order to calculate the sorption parameters, the number of binding sites for Langmuir type sorption, the intrinsic binding constant for Langmuir type sorption, and the partition coefficient. The number of binding sites for the wool fiber treated using Kroy method was lower than those for the other wool fibers in buffer solutions. Kroy treatment made the intrinsic binding constant lower in pH4 buffer solutions. Three cationic bolaform electrolytes were used as dyeing auxiliaries for the acid dyeing of the shrink-proofed wool fibers. Their effects were dependent on the structure of the bolaform electrolytes. In the case of the bolaform electrolyte containing hydroxyl and amino groups, the number of binding sites was increased, while the degree of the increase was different between two substituents. Furthermore, the addition of the bolaform electrolytes having hydroxyl groups made the partition coefficients higher. Such effects changed with different shrink-proofing methods.
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  • Development of a Device Using Cylinder Method for Measuring Clothing Pressure of Elastic Socks and Pantyhose
    Harumi Morooka, Mikiko Nosaka, Hidefumi Koga, Hideo Morooka
    2007 Volume 63 Issue 5 Pages 130-137
    Published: 2007
    Released on J-STAGE: June 10, 2007
    DOIhttps://doi.org/10.2115/fiber.63.130
    JOURNAL FREE ACCESS
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    This study aims to develop a new clothing pressure measuring device for elastic socks and pantyhose, which uses a leg mannequin with sixteen built-in type compression sensors. The design concept is intended to be easy to use in factories, not to take much time to measure, and not to require special skills to operate. The leg mannequin has the standard leg size of women in their twenties in Japan. The device can measure the pressure PBB caused by the force of the cylinder sensor's protrusion from the inside of the leg. The sensor-stroke is 2mm, and the sensor-head has a curvature radius of 11mm. Many clothing pressure values PW on human legs were measured by using many subjects to analyze the relationship between PBB and PW. The results showed that PW can be predicted from the square root of PBB with a high degree of accuracy. When the obtained prediction equations are imported into a computer connected to the device, PW can be predicted by the computer as it measures PBB. Moreover, the problem about the size of socks and pantyhose with regard to body size was discussed.
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