Hardwood plywood is made up of three or more thin layers
of wood veneer laid on top of each other and glued with the grain
of each layer or ply running perpendicular to the one on either side
of it. Hardwood plywood offers an inexpensive, and environmentally
responsible alternative to its solid wood counterparts.
Sources: For information go to the Composite Panel Association,
703-724-1128 compositepanel.org; and the Decorative Hardwoods
Association, 703-435-2900, DecorativeHardwoods.org
Medium density fiberboard (MDF) panels typically consist
of cellulosic fibers combined with a synthetic resin or other suitable
bonding system. The surface is flat, smooth, uniform, dense and free
of knots and grain patterns, and the homogeneous density profile
allows for intricate and precise machining and finishing techniques.
Particleboard consists of cellulosic particles of various sizes
that are bonded together with a synthetic resin or binder. Particle
geometry, resin levels, board density and manufacturing processes
may be modified to produce products suitable for specific end uses.
Particleboard panels are manufactured in a variety of dimensions
and with a wide range of physical properties.
Hardboard panels and sheets are manufactured primarily from
inter-felted ligno-cellulosic fibers. Hardboard has a uniform thickness,
density and appearance and has no grain. The sheets can be cut,
routed, shaped and drilled, and as with MDF and particleboard, can
be laminated with paper overlays, plastic laminates and veneers.
GLUING, PRESSING & MATERIALS
MADE IN THE USA
GLUING LAY UP FINISHED PRODUCT PRESSING CLEANING FEEDING
Primer on panel products
Photo: Composite Panel Assn.