THE FIREPROOF LUMBER MANUFACTURING METHOD FOR A LUMBER BOARD AND A FLOORING BOARD

摘要

PURPOSE: A flame retarding, antiseptic, high-density timber manufacturing method for an environmentally friendly wood board and flooring board is provided to impregnate a denaturalized sodium aqueous solution into timber and to inject carbon dioxide gas into the timber for hardening, thereby transforming loose wooden fibrous tissues into compact wooden fibrous tissues with reinforced durability. CONSTITUTION: A flame retarding, antiseptic, high-density timber manufacturing method for an environmentally friendly board and flooring board comprises the following steps: A timber dried to have 10% less moisture content by weight is processed into a wood board or a flooring board and then stored in a tank for impregnation. The tank for impregnation is vacuum-decompressed. The mole ratio of sodium is intensified to have a SiO2/Na2O mole ratio of 3 or more in a sodium silicate solution having the structure of Na2O nSiO2 xH2O in order to loosen cell walls and tracheids of the timber for an easy impregnation, and a first denaturalized sodium silicate solution combined with a metal ion such as Li or Ba is injected into the tank for impregnation. The tank for impregnation is pressurized to impregnate the first denaturalized sodium silicate solution into the wood board and the flooring board. The pressure in the tank for impregnation is released to return the first denaturalized sodium silicate solution back into the tank for impregnation, and the tank for impregnation is vacuum-decompressed again. The mole ratio of sodium is intensified to have a SiO2 / Na2O mole ratio of 3 or more in a sodium silicate solution having the structure of Na2O nSiO2 xH2O to maximize a frame retardant property, antisepsis, and sensitivity; and a second denaturalized sodium silicate solution combined with a metal ion such as Al, Li or Ba is injected into the tank for impregnation. The pressure in the tank for impregnation is released to return the second denaturalized sodium silicate solution back into the tank for impregnation, and then carbon dioxide is injected for the first and the second denaturalized sodium silicate solution inside the timber to be ion-bonded and hardened to be deposited to the cell walls of the timber. The wood board and the flooring board and carbon dioxide are removed, and the wood board and the flooring board are dried. [Reference numerals] (AA) Stacking timber in a tank; (BB,FF) Vacuum decompression; (CC) Injecting a first denaturalized sodium silicate solution; (DD,HH) Pressurizing; (EE,II) Recovering pressure-released solution; (GG) Injecting a second denaturalized sodium silicate solution; (JJ) Injecting carbon dioxide; (KK) Reassembling the tank; (LL) Stacking after drying