What is Plywood?
Plywood is a three-layer or multi-layer board-like material that is made of wood sections that are peeled into veneers or sliced into thin wood, and then glued with adhesives. Usually, odd-numbered veneers are used, and adjacent layers of veneers are used. The fiber directions are glued perpendicular to each other.
Plywood is one of the commonly used materials for furniture, and it is one of the three major boards of wood-based panels. It can also be used for aircraft, ships, trains, automobiles, buildings and packaging boxes. A group of veneers are usually assembled and glued together according to the direction of the wood grain of adjacent layers perpendicular to each other. Usually, the surface board and inner layer board are symmetrically arranged on both sides of the center layer or core. The slab made of the veneer after gluing is criss-crossed according to the direction of wood grain, and pressed under heating or non-heating conditions. The number of layers is generally an odd number, and a few have even numbers. The difference in physical and mechanical properties in the vertical and horizontal directions is small. The commonly used types of plywood are three-ply board, five-ply board and so on. Plywood can improve wood utilization and is a major way to save wood. The usual length and width specifications are: 1220×2440mm, and the thickness specifications are generally: 3, 5, 9, 12, 15, 18mm, etc. The main tree species are: beech, camphor, willow, poplar, eucalyptus and so on.
How to distinguish good quality plywood from bad quality?
1. The material of plywood is very important to plywood,good quality plywood always has good material.
The first thing to examine is the material of plywood. The prices of different tree species are different. We can choose the appropriate species according to the decoration budget during decoration. The supply of any kind of decorative material exceeds the demand in the current market. Many low-priced meranti plywood occupies a corner of the material market. This kind of plywood is made of poplar core board with surface coloring treatment. The boards are basically the same, but the quality varies greatly. Both the quality and the density of the willow core board are higher than that of the poplar core board, so you must choose carefully when purchasing.
2. The plywood with good quality is always has a good looking surface.
Observe whether there are cracks, wormholes, bubbles, stains and other bad marks on the surface of the plywood. Some plywood manufacturers stick two veneers with different textures together, so when purchasing, check whether the seams of the plywood are Tight, there is no uneven phenomenon. Furniture made of cracked plywood is unsightly.
3. Glue is also important to a good quality plywood.
Since some plywood is pasted, it is necessary to observe whether its color is consistent, whether the texture is consistent, and whether the color of the wood is coordinated with the color of the furniture paint. The color of the plywood to be purchased should be consistent with the overall effect of the decoration. coordination.
4. Then check whether the workmanship of the plywood is fine,good quality plywood always has good workmanship.
Since plywood is made of two veneers pasted together, there must be a front and a back. The surface layer of plywood should have clear wood grain, the front side should be smooth and smooth, and the back side should not have a rough and thorny feeling, and no joints. If the plywood is degummed, it will not only affect the construction, but also cause pollution. Therefore, you can gently tap the board with your hands when selecting. If there is a crisp sound, it means that the board is well bonded. If there is a thick sound, it indicates that the board has degumming .