Journal of The Adhesion Society of Japan
Online ISSN : 2187-4816
Print ISSN : 0916-4812
ISSN-L : 0916-4812
Volume 37, Issue 8
Displaying 1-5 of 5 articles from this issue
Review
Review
Technical Report
  • Kazuya NAGATA, Shigeki HIKASA, Daisuke SAKAKI, Kiyoshi KOBAYASHI, Izum ...
    2001 Volume 37 Issue 8 Pages 309-315
    Published: August 01, 2001
    Released on J-STAGE: October 31, 2014
    JOURNAL FREE ACCESS
    The mechanical properties of polypropylene (PP) filled with CaCO3 and tale particles were studied. Hybridized CaCO3 (1.4mm)-talc (3.2mm) particles were newly prepared in the presence of stearic acid by using Henschel mixer at rotation speed above 2500 r.p.m.. Scanning electron microscopic observation showed that aggregates of talc particles were disintegrated during hybridizing process. The impact strength of PP filled with blended CaCO3-talc particles, prepared at rotation speed below 2000 r.p.m. , decreased significantly with decreasing CaCO3/talc ratio, whereas that of PP filled with hybridized particles remained relatively high. It was suggested that the homogeneous dispersion of the hybridized particles in PP improved the impact strength of the composites.
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Technical Report
  • Tomonori HARA, Nobue KOIZUMI, Akira KAWAI
    2001 Volume 37 Issue 8 Pages 303-308
    Published: August 01, 2001
    Released on J-STAGE: October 31, 2014
    JOURNAL FREE ACCESS
    When the resist adhesive layer inserted in the Glass/resist/Cu/Al/Glass multilayer structure is heated, the micro void due to VF (Viscous Fingering) phenomenon is formed in the resist adhesive layer during the solvent evaporation. The purpose of this paper is to analyze the destruction property of the Glass/resist/Cu/Al/Glass multilayer structure with regard to the stress concentration and stress relaxation of the resist adhesive layer due to void formation. The destruction strength of the resist adhesive layer inserted in the multilayer structure was measured by using the peeling tester. As the result, the destruction strength of the multilayer structure increases with increasing the number of void in the adhesive layer. Moreover, the Al/Glass interface destruction occurs extensively around the each void. It is considered that the destruction phenomena were due to stress relaxation of resist adhesive layer and to stress concentration around the void, respectively.
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Original Paper
  • Masatsugu MURASE, Chiaki KATOH
    2001 Volume 37 Issue 8 Pages 298-302
    Published: August 01, 2001
    Released on J-STAGE: October 31, 2014
    JOURNAL FREE ACCESS
    The adhesion degradation in the wet environment where a temperature gradient exists from a coating layer side to a steel pipe side was investigated about the polyethylene coated steel pipe which has the epoxy primer layer as the surface treatment. When coating layer side was at high temperature and a steel-materials side was at low temperature, the diffusion in the polyethylene-coating layer of water is promoted, and adhesion degradation became faster. The temperature dependence of time to set the adhesion strength (90 degrees peel strength) of a coating layer to 20Ncm-1 for temperature difference 0, 6, 10 and 15 °C are almost same and each activation energy obtained from temperature dependence was in agreement with it of the diffu-sion in the polyethylene coating of water. The relationship between temperature difference DT and time to set the adhesion strength of a coating layer to 20Ncm-1, t20 was obtained. (t20=B/(A+ D T)+C, A, B, C: const) This can be explained by using the equation of diffusion for water through coating under temperature gradient.
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