This research examined the potential for using peanut husk as a fiber alternative to wood in the production of melamine-formaldehyde (MF) particleboard. MF resin was used to produce panels with one, three, six, nine or 12 percent resin contents. Modulus of Rupture (MOR), Modulus of Elasticity (MOE), Internal Bond (IB)...
The substantial increase in resin costs due to the recent energy
crisis, increased public awareness to the problem of free formaldehyde
from boards bonded with urea-formaldehyde resins, and a projected
increase in the production of exterior board have emphasized the need
for new and substitute adhesive systems. One new development...
Competition for the conventional supply of wood residue utilized
by the particleboard industry is increasing. Utilization of low
quality residues by the pulp and paper industry, new sawmill and
plywood recovery techniques, and the growing practice of converting
low quality residues into steam and electrical power have all cut into...
Nonlocal theories of continuum mechanics are used to model the
fracture behavior of particleboard in tension perpendicular to the plane
of the board. Classical theories of fracture are examined in comparison
to a nonlocal crack solution which has removed the stress singularity
at the crack tip. With the removal of...
Past research has implied that differences in blender performance
between commercial and laboratory particleboard blenders
may not be attributed to resin distribution between screen fractions,
as is commonly believed in the industry today, but to which particles
within a screen fraction have resin and which do note
To test this,...
Effects of stochastic variations of parameters in the planning
and design of a particleboard production system are studied. The
solution obtained from a linear deterministic optimization model is
compared against both the solution derived from the traditional
stochastic programming techniques and the distribution of optimal
objective function values obtained from...
The quality and cost of wood particle composites are substantially
determined by how the adhesive that bonds the composite is
distributed on the particles. Distribution of the adhesive is controlled
by the method of application. Currently the adhesive is applied by
spraying it onto the particles. It was hypothesized that...
This study consists of an evaluation of economic efficiency in the
particleboard industry of Oregon between 1958 and 1970. Measures of
efficiency included aggregate capital and labor use in the production
process, relative economies of scale, and relative technological
efficiencies of individual particleboard plants.
The rapid growth of the industry...
The ability of the resin to deform plastically can be an
important factor when considering the mechanical properties of particleboard.
Between resin droplets there exists an unbonded region
that forms the surface for a crack. When particleboard is deformed
stress concentrations develop at the crack tips in the voids. A...
Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco] lumber was
converted to flakes, which were dip treated with three concentrations
each of copper chrome arsenate Type C (CCA-C), and disodium octaborate
tetrahydrate (TIM-BOR). Azaconazole [1-[{2-(2,4-dichloropheny1)-1,3-
dioxolan-2-yl}methyl]-1H-1,2,4-triazole] was used as powder. The
flakeboard panels (305 x 304 x 13 mm) were made using phenolformaldehyde...
The development of an OSB (oriented strand board)
industry in Western Oregon would prove to be a real boost
to the economy of an area that has suffered from the
earlier recession of the forest products industry. Past
studies have shown that it is technically feasible to
produce OSB from...
Wood and wood-based composites are being used in either
new or more demanding applications. A means is needed to
successfully analyze new materials and to predict their long-term
performance. Two techniques, dynamic mechanical
analysis (DMA) and time-temperature superposition (TTS) offer
a means to accomplish this objective. The outcome of this...
Particleboard is a widely used composite panel product
consisting of consolidated wood particles and adhesive. On
a macro level the panel appears to be homogeneous, however,
its density varies both throughout the plane of the panel
as well as through its thickness. Of concern for this
thesis is the through-thickness...