Plywood is a three - layer or multi-layer plat - shaped material, usually with odd number of veneer, and make the fiber direction of adjacent layer veneer perpendicular to each other.

Plywood is one of the commonly used furniture materials, one of the three wood-based panels, can also be used for aircraft, ships, trains, automobiles, construction and packaging materials. A group of veneers is usually glued together perpendicular to each other in the direction of the grain of adjacent layers, and the surface and inner layers are usually arranged on both sides of the central layer or board core. After coated veneer according to the direction of wood grain crisscross the slab, under the condition of heating or not heating pressed. The number of layers is usually odd, and a few are even. There is little difference in physical and mechanical properties. Commonly used plywood types have plywood, plywood, etc. Plywood can improve the utilization rate of wood and is a main way to save wood.