The effect of fire-retarding agent type and press temperature on the fire resistance of medium density fiberboard

shirzaei, Sakineh (2016) The effect of fire-retarding agent type and press temperature on the fire resistance of medium density fiberboard. Masters thesis, University of Zabol.

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Wood has different strength against physical destroying agents, such as fire and some treatments to improve its durability. In this study, the effect of temperature press and different fire retardant on the physical and mechanical properties of medium density fiberboard (MDF) fire retarded with borax, boric acid and ammonium sulphate were studied. Temperature press at five levels (135, 150, 165, 180, and 195) and borax, boric acid and ammonium sulphate at five level (0, 1/5, 3/88, 5/83 and 7/77 %) according to the specified proportions according to the RSM software were used as variables in this study. The pressing time 9 min for all treatments were considered fixed. Therefore resistance to mechanical (internal bonding (IB), modulus of rupture (MOR), modulus of elasticity (MOE)) and fire (Ignition time, Fire endurance and Loss weight) and physical (thickness swelling (TS) and water absorption (WA) after 2 and 24 h immersion in water) board and statistical analysis were performed using RSM software. The results showed that the fire retardants increased the fire resistance in the MDF. Also, it caused a significant reduction in the water absorption and the thickness swelling. Treatment with the acid boric, borax and sulphate ammonium decreased significantly the mechanical properties of the treated boards. It concluded by fire retarding material without disadvantageous effects on environmental, wood anti-combusting property may be improved. The test also was conducted and density profiles and FTIR. Results showed that by increasing the heat in a fixed amount of material fire retardant, density profiles levels to the Max.

Item Type: Thesis (Masters)
Uncontrolled Keywords: Medium density fiberboard, Fire retardant, Press Temperature, physical and Mechanical properties
Subjects: T Technology > TS Manufactures
Depositing User: admin admin1 admin2
Date Deposited: 20 Dec 2016 07:03
Last Modified: 20 Dec 2016 07:03

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