Publicação on-line; 28 ref.; 4 tables; 2 illus.; Summary (En)

ABSTRACT

Wood scarcity, attacks by primates and insects, and fungal damage in forest plantations make
the introduction of new species necessary. Given this, it is important to understand the potential
uses of wood in the production chain. Pinus patula Schltdl & Cham presents good adaptation
to Brazilian conditions and is a candidate for wood supply. Its juvenile wood density however,
is lower than that of other pine species. This study aimed to evaluate the properties of veneer
on panels produced with twelve-year old P. patula wood compared with panels produced with
P. taeda wood of the same age, which is commonly used for panel production. Panels were bonded
with urea-formaldehyde and phenol-formaldehyde adhesives using veneers applied on two
types of plywood panel. The P. patula panels showed lower strength, stiffness and density when
bonded with urea-formaldehyde, and higher strength, density and stiffness when bonded with
phenol-formaldehyde in comparison with P. taeda. P. patula panels can be used for multilayer
panel production.

Keywords: phenol-formaldehyde, urea-formaldehyde, Pinus taeda, plywood, veneers.