Particle Board And Woodworking

Particle Board has become a preferable part of various Wooden Composites. In manufacturing of a variety of Car Case Backs, Drawer Bottoms, and Concealed Panels, the Particle Board is extensively used.

History
Particle Board was first developed in the 1930s. At that time, Particle Board was made from Recycling Wood Flakes, Chips, and Sawdust dismissed as Sawmill Waste.

Later, it was found that better strength, appearance and resin economy could be achieved by using more uniform, manufactured chips. Considering the same, manufacturers began processing solid birch, beech, alder, pine and spruce into consistent chips and flakes. The finer layers were then placed on the board"s outer sides. And with the central section composed of coarser, cheaper chips, three layered board was invented. This type of board was known as Three-Layer Particleboard.

Present
Today, many mills focus mainly on particleboard production, processing softwood and medium-density hardwoods into composite particles with machines called drum flakers, chippers and hammer mills.

More recently, graded-density particleboard has also evolved. It contains particles that gradually become smaller as they get closer to the surface.

Methods Of Manufacturing
Particleboard is manufactured by two basic methods:
*Extrusion: For extrusion processes that are not very common, wood particles are mixed with adhesives and are made into panels by forcing through small opening. Orientation of the grain particles here is at 90 degrees to the panel"s face.
*Mat-forming: Particles and adhesives are squeezed in the process of mat forming. Pressed into a mat, the grains here lie parallel to the face of panels.

Major Kinds
*Mat-formed particleboard comes in three configurations. These are:
*Single-layer Particle Board: Having uniformly sized and shaped wood particles.
*Multi-layer Particle Board: Coarser shavings at the core and finer shavings on the outside surface of panel.
*Graded-density Particle Board: Here, the change from coarse to finer particles is more gradual than multi- layer particleboard.

Availability
Standard Particle Boards are available in sheets of 4 by 8 feet. Besides, these are available in 5-by-10 panels. Thicknesses range from 1/4 to 2 inches.

Particle Board Manufacturers chiefly make them from blends of wood particles and synthetic adhesives. These are bonded together under intense heat and pressure, to compose strong and durable Particle Board, which is used for further making solid woods. The Particle Board is basically less expensive and quite affordable for a common man. Besides, the Particle Boards are more dimensionally stable than plain wood.

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