[ Chinese wardrobe net ] 5 elements of purchasing multi-layer board
Multi-layer board, also called plywood, is one of the commonly used materials for furniture. It is a three-layer or multi-layer plate-like material which is made by cutting a wooden section into a veneer or by cutting it into a thin wood by wood, and then bonding it with an adhesive. An odd number of veneers are usually used, and the fiber directions of the adjacent veneers are vertically glued to each other.
Commonly found in the market are three plywood, five plywood, nine plywood and twelve plywood (commonly known as plywood, five PCT, nine PCT, twelve PCT). Good structural strength and good stability. Multi-layer boards contain a large amount of glue, and must be edge-sealed during construction to reduce pollution. Plywood is mainly used for various wood products such as the bottom plate of decorative panels and the backboard of panel furniture.
Compared with ordinary market plywood, the multi-layer board has small deformation, high strength and good internal quality (small hole and no delamination after cutting saw), environmental protection grades are E1 and E0, good flatness, and can produce different thicknesses of 5--40mm. It is suitable for all kinds of high-end furniture, professional speakers, air boxes, marine, car boxes and other projects.
The choice of multi-layer board mainly depends on its formaldehyde emission and bonding strength. If the gluing strength of the plywood is not good, it is easy to fall apart. When selecting, pay attention to whether the nominal thickness of the multi-layer board matches the actual thickness. Pay attention to the following points when choosing a multi-layer board:
Multilayer boards have the difference between front and back. When selecting, the plywood should have a clear wood grain, a smooth and smooth front surface, and no roughness.
2. The multi-layer board should not have any defects such as breakage, bruises, bruises, and shackles.
3. The multilayer board has no degumming phenomenon.
4. Some multi-layer boards are made by sticking two veneers of different textures together, so it is necessary to pay attention to the joints of the splints in the selection, there should be no unevenness.
5. When selecting multi-layer boards, care should be taken to select multi-layer boards that are not loose. If the sound is brittle when the hands are knocked on various parts of the multi-layer board, the quality is proved to be good. If the sound is boring, it means that the multi-layer board has been discolored.
4 precautions for blockboard maintenance
Blockboard can be widely used in the current decoration industry. If we do not use it in the process of using it, it will not only make its performance not reflected, but also affect its service life. So, what should you pay attention to during the maintenance of blockboard?
First: keep well ventilated, moisture-proof, and sun-proof.
Second: Anti-oil or chemical substances are in contact for a long time and corrode the surface.
Third: Blockboard is strictly prohibited from being hit by hard objects or blunt objects because of its thin surface.
Fourth: When using joinery strips, three or more wooden strips should be placed on the above horizontal mats, and the height should be 5 cm or more. The blockboard should be placed flat on top to prevent deformation and warpage.
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