Plywood contains a certain amount of formaldehyde, because the manufacturing process of plywood uses a large amount of urea-formaldehyde resin glue, as a chemically synthesized formaldehyde resin glue must be accompanied by formaldehyde, the so-called environmental protection is only the amount of formaldehyde content.
Plywood is a commonly used material in home renovation. Plywood is made of wood shavings and urea formaldehyde resin pressurized together. 12 cm plywood is usually made of 3-4 layers of natural wood chips, each layer of double-sided roller glue and then hot pressed, the whole board uses about 3 kg of glue. If there are toxic substances such as formaldehyde or cyanide in the glue used in the board factory, then the plates it produces are toxic, and if you use these boards to make furniture, these furniture will be toxic. Therefore, products made of plywood will emit a small amount of formaldehyde. New products emit the most formaldehyde, and the longer they are used, the less they smell, but they all take many years to fully volatilize.
Of course, when choosing plywood, it mainly depends on its formaldehyde release and gluing strength, if the gluing strength of the plywood is not good, it is easy to fall apart Whether the plywood is environmentally friendly depends on the formaldehyde content in the glue. Among them, there are three main types of environmentally friendly glue: E0, E1 and E2. The formaldehyde content of E0 glue is the lowest, the formaldehyde content in E0 glue is not more than 0.5mg/ml in CARB P1 stage, and the formaldehyde content in E0 glue is not more than 0.3mg/l in CARB P2 stage; The formaldehyde content in E1 glue is not more than 1.5mg/l; The formaldehyde content in E2 glue is not more than 5mg/l; Therefore, if you want environmentally friendly plywood, try to choose E0, E2 glue, especially for exports to United States and Europe.
At the same time, when buying furniture, try to choose wooden ones instead of ones made of plywood. The plywood itself is easy to identify, as the shavings pressed together can be seen on each side, but it becomes difficult to spot once it is made into furniture, as it is often hidden behind the skin of the wood and must be carefully inspected, usually in the joints and where the holes are drilled. Those furniture that claims to be made of real solid wood often have plywood hidden inside.
