Umidade de equilíbrio de painéis OSB produzidos com inclusão laminar e com diferentes tipos de adesivos

CERNE

Mendes, Lourival Marin¹  Protásio, Thiago de Paula¹  Mendes, Rafael Farinassi¹  Mesquita, Ricardo Gabriel de Almeida¹  Oliveira, Stefânia Lima¹ 

[1] Universidade Federal de Lavras, Lavras, Brasil$$

关键词: Equilibrium moisture content;    modeling;    temperature;    relative humidity of air.;   

DOI  :  10.1590/S0104-77602014000100016

来源: Universidade Federal de Lavras-UFLA

【 摘 要 】

The aim of this study was to evaluate different statistical models to estimate the equilibrium moisture content of OSB panels exposed to different conditions of air temperature and relative humidity, And also to evaluate the influence of the adhesive and veneer inclusion in the equilibrium moisture content. The panels were produced with three different adhesive types (phenol-formaldehyde - FF, melamine-urea-formaldehyde - MUF, and phenol-melamine-urea-formaldehyde - PMUF) and with and without veneer inclusion. The evaluation of the equilibrium moisture content of the panels was carried out at temperatures of 30, 40 and 50°C and relative humidity of 40, 50, 60, 70, 80 and 90%. The modeling of equilibrium moisture content was performed using the statistical non-linear and polynomial models. In general, the polynomial models are most indicated for determining the equilibrium moisture content of OSB. The models adjusted only with air relative humidity presented the best precision measurements. The type of adhesive affected the equilibrium moisture content of the panels, being observed for adhesives PMUF and FF the same trend of variation, and the highest values obtained for the panels produced with adhesive MUF. The veneer inclusion decreased the equilibrium moisture content only in the panels with MUF adhesive.

【 授权许可】

Unknown