Influence of chipping methods on particle characteristics from recycled particleboards
摘要
Recycling wood and wood-based products, such as particleboards, offers a sustainable solution to wood resource constraints by generating particles for new particleboard production. This study evaluated the impact of two chipping methods—chipper-flaker and chipper-hammer mill—on the properties of particles derived from raw and melamine-faced recycled particleboards. Analytical techniques, including weight, dimensional, and geometric (shape) analyses, bulk density, pH, and resin absorption assessments, were used to characterize the particles, with results compared to industrial wood particles. Findings indicate that recycled particleboard particles exhibit higher bulk density and lower pH than industrial wood particles. The chipper-hammer mill method produced a higher weight% of coarse particles, while the chipper-flaker method generated more fine particles. Compared to industrial wood particles, recycled particleboard particles contained significantly more fine particles and fewer oversized particles. The chipping method and particleboard type influenced particle geometry (aspect, slenderness, and flatness ratios), with the chipper-flaker method yielding ratios closer to those of industrial wood particles. Conventional chipping equipment can effectively produce particles with suitable dimensions and shapes for particleboard manufacturing. Needle-shaped and rectangular particles comprised the majority of the particles (more than 50%) obtained from raw and melamine-faced particleboard. Overall, the chipper-hammer mill method excels in producing particles with optimal weight distributions, while the chipper-flaker method yields particles with superior geometric properties, enhancing their suitability for high-quality particleboard production.