MOKUZAI HOZON (Wood Protection)
Online ISSN : 1884-0116
Print ISSN : 0287-9255
ISSN-L : 0287-9255
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Volume 21, Issue 1
Displaying 1-7 of 7 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    1995 Volume 21 Issue 1 Pages 2-9
    Published: January 25, 1995
    Released on J-STAGE: May 22, 2009
    DOIhttps://doi.org/10.5990/jwpa.21.2
    JOURNAL FREE ACCESS
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  • Effect of mold on the shear strength of plywood
    Akira TAMURA, Kentaro SUZUKI
    1995 Volume 21 Issue 1 Pages 10-15
    Published: January 25, 1995
    Released on J-STAGE: May 22, 2009
    DOIhttps://doi.org/10.5990/jwpa.21.10
    JOURNAL FREE ACCESS
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    To determine the effects of the moisture uptake and mold growth on the shear strength of plywood, 3-ply (0.6+1.3+0.6mm) samples were prepared by using the tropical hardwood veneers and urea formaldehyde resin as the raw material and the adhesive, respectively. The samples were exposed to different conditions, which were five types of mold fungi inoculated on the malt-agar medium according to JIS Z 2911, the sterilized one, constant temperature and humidity (20°C, RH), and outdoor on the concrete roof. The values of shear strength and wood failure along the glue-lines were determined after 1, 2, 3 and 12 months of exposure.
    The results obtained were as follows;
    1. The mold growth of Aspergillus niger caused the significant reductions of shear strength and wood failure as much as 44 and 41 % of the initial strength, respectively, after 2-month exposure.
    2. The mold fungi except for A. niger and the accerelated-aging conditions showed the shear strength of about 80 to 90% of the initial values after 2-month exposure.
    3. The shear strength decreased and the wood failure increased with the increase of the mass weigth of the specimens, and this characteristics were considered to be related to the penetration of water in the glue.
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  • [title in Japanese]
    [in Japanese]
    1995 Volume 21 Issue 1 Pages 16-22
    Published: January 25, 1995
    Released on J-STAGE: May 22, 2009
    DOIhttps://doi.org/10.5990/jwpa.21.16
    JOURNAL FREE ACCESS
    Download PDF (429K)
  • [title in Japanese]
    [in Japanese]
    1995 Volume 21 Issue 1 Pages 23-27
    Published: January 25, 1995
    Released on J-STAGE: May 22, 2009
    DOIhttps://doi.org/10.5990/jwpa.21.23
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1995 Volume 21 Issue 1 Pages 28-30
    Published: January 25, 1995
    Released on J-STAGE: May 22, 2009
    DOIhttps://doi.org/10.5990/jwpa.21.28
    JOURNAL FREE ACCESS
    Download PDF (3452K)
  • [title in Japanese]
    [in Japanese]
    1995 Volume 21 Issue 1 Pages 31-32
    Published: January 25, 1995
    Released on J-STAGE: May 22, 2009
    DOIhttps://doi.org/10.5990/jwpa.21.31
    JOURNAL FREE ACCESS
    Download PDF (1651K)
  • [title in Japanese]
    [in Japanese]
    1995 Volume 21 Issue 1 Pages 33-37
    Published: January 25, 1995
    Released on J-STAGE: May 22, 2009
    DOIhttps://doi.org/10.5990/jwpa.21.33
    JOURNAL FREE ACCESS
    Download PDF (5090K)
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