Books : Characteristics of particleboard made from recycled wood-waste chips impregnated with phenol formaldehyde resin [An article from: Building and Environment]
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Type of bind: Digital
Format: HTML
Label: Elsevier
Manufacturer: Elsevier
Printing Date: January 01, 2007
Publishing house: Elsevier
Studio: Elsevier
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This digital document is a journal article from Building and Environment, published by Elsevier in 2007. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
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The main purpose of this study was to manufacture water-resistant particleboard for use in kitchens and bathrooms, and as flooring-based material and in outdoor environments. The chips were from recycled fibre wastes of different fibre species. The chips were divided into coarse chips with dimensions of 5-8 mesh and fine chips of 8-20 mesh, then, these chips were immersed in water-soluble phenol formaldehyde (PF) resin solution at concentrations of 4.5%, 6.5% and 10%. After 5min, they were removed from the PF solution and dried in an oven until in a half-hardened condition. Three-layer mats with target densities of 0.70 and 0.80g/cm^3 were formed by using fine chips for the face layer (25%) and back layer (25%) and coarse chips for the core layer (50%). A conventional hot press was used for fabrication of the particleboard, and the temperature, pressure and pressing time were 453K, 2.9MPa, and 5min, respectively. The nominal dimensions of particleboard were 500x500x12mm (thick). Result showed that the PF resin absorption content of chips (RC) increased linearly with an increase in the concentration of PF solution. Their relationship could be represented by the linear regression formula. The bending strength, internal bonding strength, and thickness swelling (%) of the PF-impregnated particleboards exhibited excellent performances compared to those made in the past, and the retention rate (%) of the modulus of rupture (MOR) and modulus of elasticity (MOE) of PF-impregnated particleboard after treatment in hot water (343K) for 2h were maintained at 48.7-84.5% and 49.2-82.7%, respectively. Characteristics of the ultrasonic velocity in the mechanical direction were similar to those in the vertical direction. In addition, there were significant relationships between the ultrasonic velocity and the mechanical properties of the particleboard, and this meant that we could evaluate the properties of the particleboard using ultrasonic velocity.
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