The standard size of blockboard is generally 1220× 2440mm, and the commonly used thicknesses are 12mm, 15mm, 18mm, 20mm, etc. Wood board refers to a special plywood made of wood board or hollow board with two or more layers of plywood on both sides.

Second, how to buy artificial plates?

1, formaldehyde emission is an important index in wood-based panels. When consumers buy wood-based panels, they should try to choose panels with less pungent smell and lower formaldehyde emission. According to the national standard, the formaldehyde emission of board can be divided into two grades: E 1 grade can be used directly indoors; Level E2 must be completed before it can be used indoors. Therefore, consumers should pay attention to the formaldehyde emission level indicated by the manufacturer when purchasing.

2. A good artificial board should have a smooth surface, no bubbling and delamination, uniform thickness, no obvious warping and no defects around the edges. Regular production enterprises will indicate the factory name, site, product implementation standard number, product grade and formaldehyde emission grade on the bulletin board, and consumers should try to buy from reputable building materials supermarkets.

3. What is the production method of wood-based panel?

1. Plywood is made of boiled and softened logs, which are cut into large pieces by rotation, and then the fiber directions of each piece are placed perpendicular to each other, glued with synthetic resin with good water resistance, and then pressed, dried, sawed and trimmed. Its number of layers is odd, generally 3- 13, which are called three-layer board and five-layer board respectively. 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, 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 kind of 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 an artificial board which is made of the corner waste produced in the wood processing process, after shaping, planing, gluing, splicing and veneering. Generally, the core of the board is made of fully dried short wood strips, and the board surface is made of 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, large width and thickness. Besides surface decoration, it can also be used as a structural material.

5. Other production of wood-based panels: The raw materials used in wood-based panels, except the logs used for plywood, mostly come from logging and processing residues, small-diameter timber (below 8 cm in diameter). Sheet, strip, needle and granular materials made by crushing or chipping and then crushing can be used to make particleboard. Wood chips are used for fiberboard manufacturing after fiber separation. This can improve the utilization rate of wood by 20 ~ 25% compared with the traditional utilization method. In the 1970s, 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, besides bagasse and hemp stalk, non-wood materials have been paid more and more attention. , has long been used in the production of wood-based panels, and extended to the stems and seed coats of many plants.