Susceptibility of thermo-hydro-treated birch plywood to mould and blue stain fungi |
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| Authors: | Ilze Irbe Juris Grinins Ingeborga Andersone Bruno Andersons |
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| Institution: | Laboratory of Wood Biodegradation and Protection, Latvian State Institute of Wood Chemistry, Riga, Latvia |
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| Abstract: | In this study, mould and blue stain susceptibility, capillary water uptake (CWU) and microstructural properties of two thermo-hydro-treated (THT) birch plywood products A and B were investigated. Plywood A represented a THT industrial plywood glued with a phenol formaldehyde (PF) adhesive. Plywood B represented panels from THT veneers glued with a PF film. The THT regimes were (temperature, °C/time, min): 150/10, 150/50, 160/10 and 160/50. Both THT plywood products and untreated samples were resistant to mould and blue stain growth in 1 month of exposure in laboratory and outdoor conditions. A statistically significant correlation between fungal growth in laboratory and outdoor conditions for plywood products A and B was not found (P?>?.05). Artificial weathering of both plywood products provided adverse fungal growth results compared to the natural weathering test outdoors. The fungal growth on plywood A and B samples mutually strongly correlated (P?
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| Keywords: | Thermo-hydro treatment (THT) moulds blue stain susceptibility birch plywood |
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