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Properties of Medium Density Fibreboard Manufactured from Extracted and Unextracted Acacia Catechu Wood Chips


Citation

Mayuree, Doungpet (1990) Properties of Medium Density Fibreboard Manufactured from Extracted and Unextracted Acacia Catechu Wood Chips. [Project Paper Report]

Abstract / Synopsis

The project was carried out to evaluate the properties of medium density fibreboard from the extracted and unextracted woodchips. The boards were produced with a 13 % urea resin, and a 3 % isocyanate resin to obtain three densities which were targetted at 650, 750, and 850 kg/m³. The same resin concentrations and types were used to produce board of the target density of 750 kg/m³. The properties of the boards from the extracted unextracted materials were determined and compared. and The chemical components of the wood were 64.27 % holocellulose, 35.63 % alhpa-cellulose, 34.38 % lignin and 1.5 % ash, with the pH of 5 to 5.1. The extracted woodchips yielded 88.35 % fibre whilst the unextracted woodchip yielded 77.92 % fibre. The strength properties of boards from the extracted woodchip with 13 % urea resin met the 300-type of JISA 5906 for all three densities . The boards with 3 % isocyanate resin met the 150-type for 650 kg/m3 and 750 kg/m3 and met the 300-type for 850 kg/m³. The urea bonded boards gave higher strength than those bonded by isocyanate resin. The 750 kg/m³ boards from the unextracted woodchip gave higher MOR with the urea than the isocyanate resin


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Additional Metadata

Item Type: Project Paper Report
Subject: Fibres
Subject: Acacia
Call Number: FH 1990 5
Chairman Supervisor: Associate Professor Mohd Zin Jusoh
Divisions: Faculty of Forestry
Depositing User: Mohd Nezeri Mohamad
Date Deposited: 23 Feb 2011 15:59
Last Modified: 25 Jul 2011 09:19
URI: http://psasir.upm.edu.my/id/eprint/9860
Statistic Details: View Download Statistic

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