1. Plywood is a board made of boiled and softened logs, which are cut into large sheets, and then the fiber directions of each sheet are placed perpendicular to each other, bonded with synthetic resin glue with good water resistance, and then pressed, dried, sawed and trimmed. Its layers are odd, usually 3-13 layers, which are called three-ply boards and five-ply boards respectively. The tree species used to make plywood are basswood, birch, ash, beech, colored wood, willow and so on.

2. Fiberboard is a board made by crushing, soaking, grinding bark, shavings, branches and other wastes into wood pulp, and then pressing, molding and drying. Due to the different temperature and pressure during molding, it can be divided into three types: hard, semi-hard and soft.

3. Particleboard is a board made of wood shavings or wood fibers with or without glue. Particleboard has low density and uniform material, but it is easy to absorb moisture and has low strength.

4. The joinery board is a kind of artificial board which is made of corner waste produced in the process of wood processing through shaping, shaving and sizing, splicing and veneering. Generally, the core of the board adopts fully dried short battens, and the board surface adopts single-layer veneer or plywood. Blockboard is not only an effective measure for comprehensive utilization of wood, but also the obtained board has uniform structure, stable size, larger width and greater thickness. Besides surface decoration, it can also be used as a structural material.

5. Other explanatory versions and emerging technologies about the manufacturing technology of wood-based panels:

The raw materials used for wood-based panels, except logs used for plywood, mostly come from logging and processing residues, and small-diameter timber (with a diameter below 8 cm). Flake, strip, needle and granular materials made by crushing or chipping and then crushing can be used for particleboard manufacturing. Wood chips are used for fiberboard manufacturing after fiber separation. This can improve the utilization rate of wood by 2 ~ 25% compared with the traditional utilization mode. In 197s, people began to pay attention to the use of bark and sawdust as raw materials for wood-based panels, but bark can only be used in the middle layer of particleboard, and the dosage should not exceed 8%, otherwise the product strength will be reduced. In addition, non-wood materials have been paid more and more attention, except bagasse, hemp stalk, etc., which have been used in the production of wood-based panels for a long time, and have been extended to the stems and seed husks of many plants.