There are four types of wood dust in the aspects of dust production: MDF,
urea-formaldehyde resin, natural softwood (pine), and natural hardwood (oak).
S, "
Urea-Formaldehyde Resins III Constitutional Characterization by [.sup.13]C Fourier Transform NMR Spectroscopy." J.
1) is much greater than in case of the composites made of oak wood flour /
urea-formaldehyde resin.
where [C.sub.pw] is specific heat of water (J/kgK) and [C.sub.pr] is specific heat of
urea-formaldehyde resin (J/kgK).
For the manufacture of panels were used polyurethane resin based on castor oil and
urea-formaldehyde resin.
Surface coatings of melamine-modified
urea-formaldehyde resins (MUFs) containing ammonium polyphosphate (APP) have been shown to significantly improve the fire retardancy of wood by prolonging the ignition time and reducing the heat release rate, total heat released, and mass loss rate.
However, it seems that a mixture of a low percentage of
urea-formaldehyde resin with cassava starch would be a viable alternative binder to manufacture particleboard with acceptable mechanical properties and enhanced surface quality.
Influence of acrylamide copolymerization of
urea-formaldehyde resin adhesives to their chemical structure and performance.
Effects of formaldehyde to urea mole ratio on thermal curing behavior of
urea-formaldehyde resin and properties of particleboard.
MWP = particleboard with mixed wood particles/recycled plastic; OF =
urea-formaldehyde resin; WP = wood particleboard.
2009b) and
urea-formaldehyde resin (Park and Kim 2008).