| abstract |
The invention relates to a treatment method and wood products thereof. In particular, a product formulation of a single phase solution combines a wood preservative (durable element) with a flame retardant element [FR] to produce a durable flame retardant treated wood product [dFR]. The durable element comprises a variety of copper-based and copper-free wood preservatives, while the flame retardant element [FR] comprises alkali metal silicates and alkali metal aluminate compounds. The durable fire retardant working solution [dFR] undergoes a chemical impregnation (treatment) followed by a heat treatment step (fixation) that blocks the chemical in the wood, making it non-leachable. The improved fire performance properties of durable fire retardant treated wood products [dFR] are tested. When heated, the wood undergoes thermal degradation and combustion producing gases, vapors, tar and carbonaceous residues. Using the 'cone calorimeter' combustion test method (AS / NZS 3837), durable flame retardant treated wood products [dFR] show a significant reduction in the following parameters: heat release rate (HRR values) average and peak), the mass loss rate (M LR), and the values generated by the smoke (smoke extinguishing area - SEA) compared to the untreated radiation pine. The main tests, which are accelerated weathering and combustion tests (AS / NZS3837), are all carried out in BRANZ, New Zealand. |