A Multi-layer board is a three-layer or multi-layer board-like material made of wood pieces that are peeled into veneers or sliced into thin wood from wood squares and then glued with adhesive. Usually, odd-numbered veneers are used and adjacent layers The fiber directions of the veneers are glued perpendicularly to each other.
Multilayer plywood, also called plywood, is one of the commonly used materials for furniture. Usually, the crown plywood surface and inner plywood are symmetrically arranged on both sides of the center layer or core. Commonly used are three plywood, five plywood, and so on. Plywood can improve the utilization rate of wood and is the main way to save wood.
Multilayer board use
Multilayer board is one of the commonly used materials for furniture processing enterprises, and it is a kind of man-made board. A group of veneers is usually formed by gluing the adjacent layers of wood grains perpendicularly to each other. The multi-layer board usually has the surface board and the inner board symmetrically arranged on both sides of the central layer or the core. A slab made of glued veneers crisscrossed in the wood grain direction is pressed under heating or non-heating conditions. The number of layers is generally odd, and a few have even numbers. There is little difference in physical and mechanical properties in the vertical and horizontal directions. Commonly used are three-plywood, five-plywood, and other multi-layer boards. Multilayer boards can improve the utilization rate of wood and are a major way to save wood. It can also be used as materials for aircraft, ships, trains, automobiles, buildings, and packaging boards.
Multilayer board is also called three plywood and three plywood is called differently for a different number of layers. According to the thickness of 3-9 mm, it can also be called 3-9 centimeter board (note: this thickness is mm, "centimeter" does not mean cm, just as a common name). Its pros and cons mainly depend on the raw materials, the price of each 1.2m ~ .4m board of Liu'anxin is 10-20 yuan. Mahogany and poplar are cheaper.
The decorative three plywood is mainly used in home decoration, that is, the very thin solid wood veneer has been pasted on the three plywood in the factory. The veneered plywood is easy to use, and the price is cheaper than buying veneer by the construction team.
The length and width specifications of the multi-layer board are the same as the length and width specifications of the building template, basically: 1220×2440mm, and the thickness specifications are generally: 3, 5, 9, 12, 15, 18mm, etc. The main tree species are camphor, willow, poplar, eucalyptus, etc.
The multi-layer board has good structural strength and good stability. It has the advantages of light material, high strength, good elasticity and toughness, resistance to impact and vibration, easy processing and finishing, insulation, etc. The plywood contains a large amount of glue, so edge sealing should be done during construction to reduce pollution during the day.
Selection of multi-layer boards
① There is a difference between the front and the back of the multilayer board. When selecting, the plywood should have clear wood grain, smooth and clean front, no roughness, and smooth and non-sluggish hand feeling.
②The multilayer board should not have defects such as damage, bruises, bruises, scar knots, etc.
③The multilayer board has no degumming phenomenon.
④Some multi-layer boards are made by pasting two veneers with different textures together, so when choosing, pay attention to the tight joints of the plywood, and there is no unevenness.
⑤When choosing a multilayer board, pay attention to choosing a multilayer board that does not lose glue. If the sound is brittle when knocking on each part of the multilayer board, the quality is good. If the sound is dull, it means that the multilayer board has loose glue.