METHOD OF RENDERING WOODEN MATERIAL FLAME-RETARDANT AND PROCESS FOR PRODUCING FLAME-RETARDED PLYWOOD THEREWITH

摘要

This invention relates to the method for flame-retarding treating of wooden materials meeting the requirements of public authorities. Flame-retarding materials are mixed with an aqueous solution, which includes ether and alcohol, such that the solution including the flame-retarding material of about 30 to 50% is prepared. Then, the solution is sprayed directly onto the wooden materials set under the normal temperature and pressure while the temperature of the mixed solution is kept over 60°C. The spraying is stopped when the weight of the wooden materials increases by at least about 20 to 30% of its original weight under dry condition. Finally, the wooden materials are dried under proper condition. Thus, flame-retarding treating of wooden material is performed. And this invention also includes the manufacturing method for flame-retarding plywood using the above-mentioned method for flame-retarding treating of wooden materials. And these methods are very simple and economical.