This research related resin synthesis variables of phenolformaldehyde resins to their chemical content and reactivity. The study was part of a larger project correlating resin properties to their performance as plywood adhesives. Formaldehyde-to-phenol and Na0H-to-phenol mole ratios were examined within the ranges used commercially. I also examined various proportions of...
Present methods of determining proper glueline cure are inadequate
in either production or laboratory situations because they
are time consuming and "after the fact". Monitoring the glueline
while the wood composite is still in the press would provide many
advantages over existing methods. Such a system would provide
greater control...
This study was undertaken to determine whether Douglas-fir (Pseudotsuga
menziesii (Mirb.) Franco) veneer could be platen-dried and then
sucessfully glued into two-ply parallel-laminated panels.
A range of veneer thicknesses, platen temperatures and final dry
moisture contents were examined. Thicknesses included were nominal
0.1, 0.2, 0.3 and 0.4 inches; platen temperatures...
The main objective of this study was to determine appropriate
accelerated aging methods for exterior plywood made with Southeast
Asian hardwood face veneers. A secondary objective of this study
was to determine the durability of exterior plywood made with keruing
(12 Dipterocarpus spp.).
To reach these objectives I made plywood...
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...
Difficulties have been encountered in gluing some Southeast
Asian woods using phenolic resin. Extractives in veneers from the
trade groups yellow, white, and red meranti (Shorea, Parashorea,
and Pentacme spp. ), keruing (Dipterocarpus spp. ), and kapur
(Dryobalanops spp. ) were suspected to be able to modify resin cure
and...
