JOURNAL of the JAPAN RESEARCH ASSOCIATION for TEXTILE END-USES
Online ISSN : 1884-6599
Print ISSN : 0037-2072
ISSN-L : 0037-2072
Volume 27 , Issue 5
Showing 1-7 articles out of 7 articles from the selected issue
  • [in Japanese]
    1986 Volume 27 Issue 5 Pages 187-191
    Published: May 25, 1986
    Released: September 30, 2010
    JOURNALS FREE ACCESS
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  • [in Japanese]
    1986 Volume 27 Issue 5 Pages 192-195
    Published: May 25, 1986
    Released: September 30, 2010
    JOURNALS FREE ACCESS
    Download PDF (6965K)
  • [in Japanese]
    1986 Volume 27 Issue 5 Pages 196-199
    Published: May 25, 1986
    Released: September 30, 2010
    JOURNALS FREE ACCESS
    Download PDF (470K)
  • [in Japanese]
    1986 Volume 27 Issue 5 Pages 200-207
    Published: May 25, 1986
    Released: September 30, 2010
    JOURNALS FREE ACCESS
    Download PDF (1153K)
  • ……On the Good Stitch……
    Isao Ajiki
    1986 Volume 27 Issue 5 Pages 208-212
    Published: May 25, 1986
    Released: September 30, 2010
    JOURNALS FREE ACCESS
    This paper describes the theoretical analysis on lock stitch seam structure, regarding a fabric as an elastic spring toward its thickness direction. The following equation has been derived on a curve of a sewing thread.
    y=-P0/F0F0/KcoshK/F0x/sinhK/F0a0+h0
    where,
    T0: sewing thread tension at the end points of boundary sectional area of fabrics,
    F0: horizontal component of T0,
    P0: vertical component of T0,
    h0: thickness of fabric,
    2a0: length of stitch zone I,
    K: elastic constant of fabric compression.
    The validity of the equation was confirmed by showing the calculated results with following parameters sewing thread tension, elastic constant and fabric thickness.
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  • Shunjiro Ogawa, Yoko Tsuchida, Azusa Miyoshi, Hiroshi Yamada, Yoshio I ...
    1986 Volume 27 Issue 5 Pages 213-218
    Published: May 25, 1986
    Released: September 30, 2010
    JOURNALS FREE ACCESS
    The changes of tensile strength of cotton, cuprammonium rayon, silk, wool and nylon 6 fibers exposed to nitrogen oxides (NOx) and light under 3 different humidity conditions…dry, normal and wet conditions…were determined. Each kind of fibers exposed to the normal condition reduced its tensile strength most. By contrast, the exposure under the dry condition resulted in slight decrease in tensile strength. The decrease in tensile strength under the wet condition was intermediate between normal and dry conditions. The results suggest that the water content in fibers and atmospheric humidity seriously affect the reaction of NOx and light with fibers. IR spectra of each fiber exposed to NOx under the normal condition showed that silk and wool fibers underwent the nitration and nitric esterification, and cotton and cuprammonium rayon underwent oxidation. It was suggested that these fibers were damaged by nitric acid caused from the absorption of NOx into the water in fibers.
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  • Part 1: on the Detergency of Cloths Soiled with Carbon Black and Fatty Acid
    Yuko Imabayashi, Seibei Yoshikawa, Katashi Takahashi
    1986 Volume 27 Issue 5 Pages 219-225
    Published: May 25, 1986
    Released: September 30, 2010
    JOURNALS FREE ACCESS
    The effect of surfactants derived from amino acid on the detergency for carbon black soil, palmitic acid and mixed fatty acid as a model of oily soil from a cotton fabric were studied. In addition, the soiling of a polyester fabric by carbon black soil and emulsification of olive oil in N-acyle amino acid surfactant of aqueous solution were also estimated.
    Since we have ascertained the excellent performance of N-acyle amino acid surfactant through an extensive investigation, we wish to report the results.
    1) The detergency of carbon black component was effective for cotton fabric in the order of: soap>HS21 (N-acyle amino acid surfactant) >SDS at 20°C, 40°C and 60°C. The detergency of HS-21 was less decreased in the hard water than that of a soap, though the detergency of SDS increased with increa-sing water hardness.
    2) The soiling of a polyester fabric by carbon black soil in HS-21 aqueous solution was very low, even if water hardness increased.
    3) Since the emulsification with HS-21 was much superior to that of SDS, HS-21 were more effective in removal of palmitic acid and mixed fatty acid than SDS.
    4) The fatty acid was removed from cotton fabrics in the order of C8>C10>C12<C18. A fatty acid of lower melting point except oleic acid was removed easier than those of higher melting point.
    5) The removability of saturated and unsaturated fatty acid is dependent on the kind of fiber. Unsaturated fatty acid (oleic acid) was removed from a fabric in the order of: polyester>cotton. On the other hand the order of that of saturated fatty acid (palmitic acid) was cotton>polyester.
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