Production of Fire-retardant LVL by Borate Compound-containing Glue and Evaluation of Its Properties

Veneers with different thickness and moisture content were bonded with phenol formallehyde resin containing ammonium borate octahydrate or bromo-phenol resin at chemical retention of 200g/m2. The cross section of the two layered LVL specimens were analyzed with X-ray photoelectron spectroscopy (XPS)...

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Published inMOKUZAI HOZON (Wood Protection) Vol. 26; no. 4; pp. 183 - 189
Main Authors HATA, Toshimitsu, SUGI, Shiro, NISHIMIYA, Koei, HIGUCHI, Naoto, IMAMURA, Yuji, ISHIHARA, Shigehisa, KAJITA, Hiromu
Format Journal Article
LanguageEnglish
Published JAPAN WOOD PRESERVING ASSOCIATION 2000
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Summary:Veneers with different thickness and moisture content were bonded with phenol formallehyde resin containing ammonium borate octahydrate or bromo-phenol resin at chemical retention of 200g/m2. The cross section of the two layered LVL specimens were analyzed with X-ray photoelectron spectroscopy (XPS) in order to evaluate the distribution of the fire retardant chemicals along the glue line. Bromine was assumed to spread in wood cells from the glue lines during pressing, which was influenced by the initial moisture content hf veneers. Broader distribution of the chemicals was detected in the specimens with higher moisture content than oven-dried ones. The penetration of resin, which was affected by the initial moisture content and thickness of veneers, influenced the fire retardancy and hickness swelling properties.
ISSN:0287-9255
1884-0116
DOI:10.5990/jwpa.26.183