Relation between the compaction rate and physical and mechanical properties of particleboards

Abstract

The compaction rate, the relation between the density of the wood panel and the density of the wood used for producing the particles, is an indicator of the product's densification. Among the various types of wood panels, particleboards are widely employed in the lumber industry, mainly for the furniture production. This paper presents a study of the relation between the compaction rate and the properties of tensile strength perpendicular to surface, Modulus of Rupture (MOR) and Modulus of Elasticity (MOE) obtained from a static bending test, thickness swelling and water absorption (2 and 24 hours). These properties were calculated according to the Brazilian ABNT, NBR 14810 standard. Particleboards were produced using the species Pinus elliotti and adhesive ureaformaldehyde. The relation was established by a multiple linear regression, and the most appropriate statistical models were determined. The estimated models indicate statistically significant effects of water absorption in 2 hours and MOR in the particleboards' compaction rate

Effect of Date Palm Cultivar, Particle Size, Panel Density and Hot Water Extraction on Particleboards Manufactured from Date Palm Fronds

“…This caused higher flexural properties and internal bond [10,19,21]. This conclusion obviously applies to our experiment ( Figures 5-9), where increasing board density resulted in an increase in all properties except 24h-TS.…”

Painéis aglomerados fabricados com mistura de partículas de madeiras tropicais

“…Cabe ressaltar que os coeficientes de variação dos valores dos módulos de resistência e de elasticidade obtidos nos ensaios de flexão estática e dos módulos de resistência obtidos nos ensaios de resistência à tração perpendicular apresentaram sistematicamente valores inferiores a 20% para o coeficiente de variação. Este valor é aceito pelos fabricantes de painéis e também é objeto de recomendação por parte de Nascimento 2003e Dias et al (2005).…”

Effect of the Particle Geometry and Adhesive Mass Percentage on the Physical and Mechanical Properties of Particleboard made from Peanut Hull

“…In this study, the best IB, MOR, and MOE values observed for the MDI-bonded specimens exceeded the requirements of the ANSI A208.1 (2009) standard (0.36 N/mm 2 , 10.0 N/mm 2 , and 1550 N/mm 2 , respectively) in the M-1 class for medium-density wood particleboard. Aside from the adhesive mass percentage and the particle geometry, the target density of the boards was also a very important factor affecting the physical and mechanical properties of the panels (Dias et al 2005). The results of the range analysis conducted for the physical and mechanical properties of the prepared peanut hull particleboards are presented in Table 2.…”