Journal of Textile Engineering
Online ISSN : 1880-1986
Print ISSN : 1346-8235
ISSN-L : 1346-8235
Volume 58, Issue 5
Displaying 1-2 of 2 articles from this issue
Original Papers
  • Hua QIU , Yoshiyuki IEMOTO , Shuichi TANOUE , Hideyuki UEMATSU
    2012 Volume 58 Issue 5 Pages 57-67
    Published: October 15, 2012
    Released on J-STAGE: January 09, 2013
    JOURNAL FREE ACCESS
    The aims of the present work are to discuss effects of cross-sectional shapes of yarn duct on the performance of interlacers and to propose knowledge for designing better interlacers by numerical simulations of compressible airflow in the yarn duct of interlacer. We used a commercial CFD software package ANSYS CFX where a finite volume method with an upwind difference scheme is applied. Results obtained are as follows: (1) The yarn opening and tangling action is caused by high dynamic pressure at the yarn duct center. In addition, it is important to form an airflow pattern which makes a yarn frequently go and come between high speed airflow region (jet region) and low speed airflow region (eddy regions) in the middle section of yarn duct for the purpose of producing the interlaced yarn with large number of opening and tangling parts. (2) The yarn opening is done in the region where an air jet issuing from the air jet nozzle hits a yarn directly. In contrast, the path lines of airflow in the yarn duct are spiral and this spiral flow has an effect on the yarn ballooning. (3) The high supplied air pressure makes the dynamic pressure high at the yarn duct center. However, too high supplied air pressure makes the yarn stay at the yarn duct wall opposite to the air jet nozzle for a long time, thus the number of tangles is not increased.
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  • Mari INOUE , Minoru FURUTANI , Hiroyuki FUJITA
    2012 Volume 58 Issue 5 Pages 69-75
    Published: October 15, 2012
    Released on J-STAGE: January 09, 2013
    JOURNAL FREE ACCESS
    The effects of finishing on the physical properties of yarn dyed cotton fabrics were studied. The fabric mechanical properties, surface properties, thermal/water/air transport properties and fabric handle were investigated in order to establish the performance characteristics of fabrics. The sample fabric with each finishing was compared with the sample before finishing as the standard. Each parameter was normalized by the parameters of standard sample and the standard deviation of all samples in this study (n=8) and the chart was established. The effects of finishing were cleared by using the chart and the change ratio of each parameter. The results on coating finishing caused the great increase of the bending and shear properties, and the case of silket, powder, bio finishing caused the decrease. Washer finishing effected on the compression properties. It was considered with the method helped the improvement and the division of the characteristics of finishing fabrics.
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