FLAME-RETARDANT, FIREPROOF, SEMI-INCOMBUSTIBLE PLYWOOD CEILING MATERIAL, AND METHOD FOR MANUFACTURING SAME

摘要

The present invention relates to a fireproof, semi-incombustible ceiling material manufactured by perforating plywood and then pressure-injecting a flame-retardant or fireproof resin in a vacuum state, and to a method for manufacturing same. In the present invention, a fireproof resin may be injected in a short period of time along the fiber direction of wood through a hole perforated in plywood to minimize the stress applied to an adhesion layer. Moreover, shrinkage stress generated during drying due to reduced drying time may be reduced. Thus, since the inside of plywood can be impregnated with a fireproof resin in an amount sufficient to meet standards for fire safety, the present invention may provide a fireproof, semi-incombustible wood-based ceiling material. In addition, the ceiling material of the present invention utilizes pre-manufactured plywood, and is thus lightweight and high-strength, and may replace, in particular, asbestos-containing inorganic ceiling materials (gypsum board, etc.), which emit radon radiation and have poor resistance to humidity and moisture. Moreover, the ceiling material of the present invention uses wood-based plywood, and thus controls temperature and humidity, preserves beautiful natural wood grain patterns and coloring, and contributes to the improvement of indoor environments. Furthermore, the ceiling material of the present invention may manufacture a ceiling material having a uniform, plate-like structure with excellent dimensional stability, which is difficult to manufacture using wood.