Abstract:

The effectiveness of fire resistance,rot resistance,dimensional stability as well as MOE/MOR of masson pine and poplar treated with FR-1,FR-2 and PF resin was briefly conducted in this article.The limited oxygen index (LOI) of masson pine treated with FR-1 was 61% at the retention of 34.5 kg/m³.The retention of which meet fire test standard GB8625-88 was defined to 30～90 kg/m³ according to wood species and thickness of timber.Weight losses of treated masson pine and poplar were under or about 10% at the fire resistant retention.Anti-swelling effectiveness (ASE) of Pinus massoniana and Populus tomentosa treated with FR-1was 30.0 % and 46.0 % respectively at the retention of 75.6 and 93.5 kg/m³.ASE of Pinus massoniana and Populus tomentosa treated with PF resin was 46.2 % and 41.4 % at the retention of 79.0 and 63.8 kg/m³ respectively according to Chinese national standard GB1934.2-91.MOE of Pinus massoniana treated with FR-1 was not significantly changed,however MOE of Populus tomentosa treated with FR-1 increased 6.1%.MOE of Pinus massoniana and Populus tomentosa treated with PF resin increased 10.6 % and 17.9 % respectively.MOR of both Pinus massoniana and Populus tomentosa treated with FR-1 was not significantly changed.

Key words: PF resin, Fire retardant, Rot resistance, Dimensional stability, MOE/MOR