JOURNAL of the JAPAN RESEARCH ASSOCIATION for TEXTILE END-USES
Online ISSN : 1884-6599
Print ISSN : 0037-2072
ISSN-L : 0037-2072
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Volume 32, Issue 11
Displaying 1-6 of 6 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    1991 Volume 32 Issue 11 Pages 498-504
    Published: November 25, 1991
    Released on J-STAGE: September 30, 2010
    DOIhttps://doi.org/10.11419/senshoshi1960.32.498
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1991 Volume 32 Issue 11 Pages 505-511
    Published: November 25, 1991
    Released on J-STAGE: September 30, 2010
    DOIhttps://doi.org/10.11419/senshoshi1960.32.505
    JOURNAL FREE ACCESS
    Download PDF (2350K)
  • [title in Japanese]
    [in Japanese]
    1991 Volume 32 Issue 11 Pages 512-517
    Published: November 25, 1991
    Released on J-STAGE: September 30, 2010
    DOIhttps://doi.org/10.11419/senshoshi1960.32.512
    JOURNAL FREE ACCESS
    Download PDF (796K)
  • [title in Japanese]
    [in Japanese]
    1991 Volume 32 Issue 11 Pages 518-526
    Published: November 25, 1991
    Released on J-STAGE: September 30, 2010
    DOIhttps://doi.org/10.11419/senshoshi1960.32.518
    JOURNAL FREE ACCESS
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  • Penetration Behavior of Sewing Needle into Polymer Film
    Sadako Kawanishi, Osamu Yuge, Toshihiko Morishita, Tsuneo Horino
    1991 Volume 32 Issue 11 Pages 534-541
    Published: November 25, 1991
    Released on J-STAGE: September 30, 2010
    DOIhttps://doi.org/10.11419/senshoshi1960.32.534
    JOURNAL FREE ACCESS
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    The nature of the force generated when a sewing needle penetrates a polymer film has been studied. An apparatus was especially designed for the measurement. The sewing needle with a quarz transducer is fixed, while a specimen is driven by a piston-crank mechanism. Experiments are carried out by varying kinds of specimens (poly-vinylchloride, polytetrafluoroethylene and natural rubber), needle diameters (DBxl#8-#18) and penetration velocities (1.5 1000rpm) . The maximum force, Wp, 2, is generated by penetration of the needle eye part to the film. Wp, 2 (gf) is experimentally related to the ratio r/R (r and R are the radius of the needle blade and that of the throat hole, respectively) by a following formula.:
    Wp, 2=K (r/R) n,
    where n is 1.36 except 0.77 for natural rubber, and K (gf) is estimated from values of three characteristics of the film, tensile modulus G (gf/mm2), coefficient of friction for the needle μ, and thickness t (mm), using the formula, K=α (G·μ·t) 1.26; α is a constant.
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  • Mechanical Action in Washing Process
    Part 3 : Effect of Washing Net on Detergency in Pulsator-Type Washing Machine
    Harumi Shiraiwa
    1991 Volume 32 Issue 11 Pages 542-548
    Published: November 25, 1991
    Released on J-STAGE: September 30, 2010
    DOIhttps://doi.org/10.11419/senshoshi1960.32.542
    JOURNAL FREE ACCESS
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    The effect of a washing net on detergency in a pulsator-type washing machine has been investigated in relation to mechanical energy input to cloths evaluated by calorimetry.
    The results are as follows:
    1) An assumption is made that the energy input to the cloths corresponds to the energy increase due to the addition of cloths into the washing system. For any given cloth load in kilograms per liter of bath ratio, the energy increase per unit weight of the cloths in washing with the net is lower than that in washing without the net. However, when the cloth loads are expressed on weight per liter of the net capacity basis in washing with the net, the energy increase is determined by the cloth load, irrespective of use of the net.
    2) Detergency depends on whether the net is used or not. For any given energy increase, lower detergency is obtained in washing with the net.
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