Because formaldehyde-based adhesives are generally used in the production process of blockboard, the finished product will release more or less free formaldehyde, and when the free formaldehyde content exceeds a certain limit, it will affect human health. Detecting the formaldehyde emission of blockboard is a complex process, and the formaldehyde emission of blockboard is simply and preliminarily judged by the following method. First, stack unused blockboards in a hut, close the doors and windows, and store them for a period of time before entering the room for observation. If there is no pungent odor, it indicates that the formaldehyde emission of blockboard is low, and the use will not affect human health; If the smell is loud or there is a feeling of tears, it means that the formaldehyde emission of blockboard may be high.
For the formaldehyde problem of blockboard, the pore size of its internal pores is between 0.27 and 0.98 nanometers, and it is arranged in crystals. At the same time, it has weak electricity, the molecular diameter of formaldehyde, ammonia, benzene, toluene, and xylene is between 0.4 and 0.62 nanometers, and they are all polar molecules, which have the characteristics of preferential adsorption of formaldehyde, benzene, TVOC and other harmful gases, so as to achieve the effect of purifying indoor air. It can adsorb and decompose formaldehyde, and it can be reused after sun exposure.
