1, the concept plywood is made of three or more layers of solid wood veneer or thin plate with a thickness of about 1 mm by hot pressing. Common plywood includes three plywood, five plywood, nine plywood and twelve plywood (commonly known as three plywood, five plywood, nine plywood and twelve plywood).
2. The characteristic structure has good strength and stability. Plywood contains a large amount of glue, so edge sealing should be done well during construction to reduce daytime pollution.
3. Uses Plywood is mainly used to decorate the bottom plate of panels, the back plate of panel furniture and other wood products.
4. Choosing plywood mainly depends on its formaldehyde emission and bonding strength. If the bonding strength of plywood is not good, it is easy to fall apart. Pay attention to whether the nominal thickness of plywood is consistent with the actual thickness when choosing.
Choose plywood should pay attention to the following points:
(1) Plywood has positive and negative points. When selecting plywood, the wood grain should be clear, the front should be smooth, not rough, flat and without stagnation.
(2) Plywood should not be damaged, bruised, bruised, scarred and other defects.
③ The whole board has no degumming phenomenon.
(4) Some plywood is made of two veneers with different lines stuck together, so it should be noted that the flat-fell seam of plywood should be tight, and there should be no unevenness in material selection.
(5) When choosing plywood, attention should be paid to choosing plywood that will not come loose. If you knock on various parts of plywood, the sound is brittle, which proves that the quality is good. If the sound is muffled, it means that the splint is loose.
Three-ply plywood is the most common kind of plywood, which is made of three-ply glued sheets staggered in different grain directions and pressed with or without heating.
The wide application of plywood in the field of home improvement greatly improves the utilization rate of wood and saves wood.
So the requirements for material selection are not very high.