耐火三層パーティクルボードの耐火性能およびその物理的・機械的性質

概要

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Three layered fire-resistant particleborads were manufactured with adhesives containing fire-retardant chemicals. Fire endurance, physical and mechanical properties of the borad were determined and discussed. The fire-retardant chemicals used were H_3BO_3, KOH, H_2O, Na_2B_8O_13・4H_2O, NaOH, and NaBR and the adhesive was a commercial urea-melamine-formaldehyde resin. The fire-retardant adhesive containing H_3BO_3 was stabilized by the addition of alkali metal compound. The fire-retardant adhesives imparted excellent fire resistant to the three layered particleborad. All of the 22 mm thick three layered particleboard and the full scale one glued with the fire-retardant adhesives successfully met the acceptance fire penetration criteria under the standard fire test for 30 minutes rating of class B wall of INTERNATIONAL CONFERENCE ON SAFTEY OF LIFE AT SEA 1960. Excepting a few fire-resistant particleborads, the basic engineering properties of the 22 mm thick three layered fire-resistant particleboard were better than or equivalant to those of the commercial fire-resistant particleboards and the untreated commercial ones.
1985-08-15