Plywood

Plywood is a three-layer or multi-layer board like material made by rotary cutting wood segments into veneers or planing wood into thin pieces, and then bonding them with adhesive. It is usually made of odd numbered veneers, and the fiber directions of adjacent veneers are perpendicular to each other.
Plywood is one of the commonly used materials for furniture, and is one of the three major artificial boards. It can also be used as a material for airplanes, ships, trains, automobiles, buildings, and packaging boxes. A group of veneers is usually glued together perpendicular to each other in the direction of adjacent layers of wood grain, with the surface and inner layers symmetrically arranged on both sides of the central layer or core. A slab made of glued veneers arranged vertically and horizontally in the direction of wood grain, pressed under heating or unheated conditions. The number of layers is generally odd, and a few may have even numbers. The differences in physical and mechanical properties in the vertical and horizontal directions are relatively small. The commonly used types of plywood include plywood, plywood, and so on. Plywood can improve wood utilization and is a major way to save wood.