what material is plywood

Plywood is made of wood.
Plywood is a kind of wood spun, sawn or planed into veneer, and then glued to form more than three layers of thin sheet. Processing processes include sawing, cooking, wood segment centering, rotary cutting, drying, cutting, separating, finishing, gluing, billet formation, prepressing, hot pressing, edging, sanding or scraping, fragmentation, packaging, etc.
When choosing plywood, it is necessary to choose according to the use of parts, local environmental and climate conditions, such as the user's economic condition is better, the selection of natural veneer veneer. If you use a humid environment, choose a plywood with high water resistance, it is recommended to choose a class 1 or 2 plywood, if it is used outdoors, you can only choose a class 1 plywood.
The veneer is usually formed by gluing the adjacent layer of wood grain to each other, and the surface plate and the inner plate are usually symmetrically arranged on both sides of the central layer or the core of the board. The billet is made of coated veneers arranged criss-cross in the direction of wood grain and pressed under heated or unheated conditions. The number of layers is usually odd, and the minority is even. The physical and mechanical properties have little difference in vertical and horizontal directions. Common types of plywood are plywood, plywood and so on. Plywood can improve the utilization rate of wood and is the main way to save wood.