Abstract
This study was to evaluate the effect of post-heat treatment on the physical and mechanical properties of MDF (Medium Density Fiberboard) panels. Commercial MDF panels were produced in Brazil using Pinus wood and urea-formaldehyde (UF) adhesive. The post-heat treatments were carried in a factorial 3 x 2 (three temperatures of heat treatment - 200, 225 and 250 °C, and two times - 5 and 10 minutes), and a control treatment (without heat treatment). Subsequently, the physical and mechanical tests were performed. From the results it can be concluded that: 1) The most effective thermal post-treatment for improving the dimensional stability of the MDF was applied at 225 ° C and 10 min; 2) All the thermally treated panels revealed a significant decrease in the modulus of rupture and modulus of elasticity (MOR and MOE) to bending when compared with the control panels without post-heat treatment.
Highlights
The furniture industry combines several production processes, including a variety of raw materials and final products
The wood furniture, hold a significant percentage of the total industry production. It is segmented into two types: straight, having a smooth, with simple design of the straight lines using particleboard and plywood panels as the raw materials; and turned, combining more sophisticated finishing details, mixing both straight and curved shapes and utilizing whose main raw material is solid wood and panels Medium Density Fiberboard (MDF), which can be machined[3]
The aim of this study was to evaluate the effect of time and temperature level of post-heat treatment on the physical and mechanicals properties MDF panels, seeking to obtain a treatment that improves the dimensional stability of the panels with the least possible effect on the reduction of mechanical properties
Summary
The furniture industry combines several production processes, including a variety of raw materials and final products. It is the result of the materials the furniture is composed of (wood, metal and other), as well as related to the uses for which they are destined[1,2]. The wood furniture, hold a significant percentage of the total industry production. It is segmented into two types: straight, having a smooth, with simple design of the straight lines using particleboard and plywood panels as the raw materials; and turned, combining more sophisticated finishing details, mixing both straight and curved shapes and utilizing whose main raw material is solid wood and panels Medium Density Fiberboard (MDF), which can be machined[3]. When the correct density and homogeneity are provided by the fibers, the MDF panel can be turned, carved and machined[6]
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