Journal of the Society of Powder Technology, Japan
Online ISSN : 1883-7239
Print ISSN : 0386-6157
ISSN-L : 0386-6157
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Volume 40, Issue 2
Displaying 1-8 of 8 articles from this issue
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  • Rheology of Fine Particle Suspension from Low to High Concentration
    Static Properties
    Youichi Nagase, Kenji Okada, Isao Sugiyama
    2003 Volume 40 Issue 2 Pages 86-92
    Published: February 10, 2003
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.40.86
    JOURNAL FREE ACCESS
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    The rheological properties of fine particle suspension can be measured by the ordinary rheometer for a relatively low density suspension (LDS) and the uni-axial compression loading test for a highly filled suspension (HFS). Since a suspension with a low concentration has a yield stress, LDS has a static elasticity as well as HFS. The purposes of this work are; 1) to study whether the elasticity is conserved over the whole concentration range from LDS to HFS, and 2) to examine whether the physical implication of yield stress of LDS is similar to that of the rupture stress of HFS from the viewpoint of destruction force between particles. Through the elasticity measurements for four different types of suspensions of fine particles, we obtained unique curves at different concentrations from LDS to HFS for each suspension, and therefore found that the elasticity is one of the representative properties of suspension. Another important finding is that a strong linear relationship exists between the rupture stress and the elasticity of HFS being independent of the type of suspension. Therefore, some uncertainty remains as for the purpose 2) even though the yield stress and the rupture stress gave a continuous curve over wide range of concentration.
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  • Observation of Filler Packing Structure in Narrow Channels of Thermosetting Plastics Molding Compound
    Tatsumi Kawaguchi, Michitaka Suzuki, Mitsuaki Hirota
    2003 Volume 40 Issue 2 Pages 93-98
    Published: February 10, 2003
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.40.93
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    Flowability of thermosetting plastics molding compound is determined mainly by the filler particle packing structure in a narrow channel. The filler packing structure in narrow channels was observed using Scanning Electron Microscope and transmitted X-ray image. For a narrow channel, the coarse particles blocked up the channel gate without fine particles among the coarse ones, and some resin flew through the openings among the filler particles trapped at the channel gate. In a middle thickness channel, fine particles filled the space among coarse ones and the high packing fraction was achieved, and almost no resin flew through the channel.
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  • Function of Polymer Fine Particles and Their Usage
    Susumu Kawase
    2003 Volume 40 Issue 2 Pages 99-107
    Published: February 10, 2003
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.40.99
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  • Lotus-type Porous Metals
    Fabrication, Strength and Application
    Hideo Nakajima
    2003 Volume 40 Issue 2 Pages 108-114
    Published: February 10, 2003
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.40.108
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  • [title in Japanese]
    Yoichi Kanda
    2003 Volume 40 Issue 2 Pages 123-124
    Published: February 10, 2003
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.40.123
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  • [title in Japanese]
    Hiromi Shirai
    2003 Volume 40 Issue 2 Pages 125-126
    Published: February 10, 2003
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.40.125
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  • [title in Japanese]
    Hiroshi Fudouzi
    2003 Volume 40 Issue 2 Pages 127-129
    Published: February 10, 2003
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.40.127
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  • [title in Japanese]
    [in Japanese]
    2003 Volume 40 Issue 2 Pages 131
    Published: February 10, 2003
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.40.131
    JOURNAL FREE ACCESS
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