How to choose wooden fire doors? Fire door functions and classifications
The following points should be noted when cooking wooden fire doors: The moisture content of the wood to be flame retardant is an important factor affecting the flame retardant quality of the wood. Because dry wood tends to absorb flame retardant liquid more easily after entering the flame retardant pool, and the amount of flame retardant liquid absorbed by the wood directly affects the flame retardant quality of the wood. The amount of absorption is proportional to the oxygen index and flame retardant depth of the flame retardant wood. The more the wood absorbs the flame retardant liquid, the better the flame retardant performance, the higher the oxygen index, and the deeper the flame retardant depth. However, many companies believe that wood will be soaked by flame retardant liquid when it is flame retardant, so the moisture content of the wood does not matter much. The wood that ne.. Read More