Surface enhanced flame retardant low odor ultra-thin fiberboard and preparation method thereof

Abstract

This invention relates to a surface-reinforced, flame-retardant, low-odor ultrathin fiberboard and its preparation method, belonging to the field of engineered wood products manufacturing technology. It addresses the technical problems of low surface hardness, high flammability, and significant odor release in ultrathin fiberboard. Key technical points include: wood raw materials are peeled, chipped, steamed, and then hot-milled into pulp; adhesives and a nitrogen-phosphorus-boron ternary flame retardant are added to the fiber pulp; after drying the fibers, the board blank is pre-pressed; a two-component surface-reinforcing agent is prepared, with agent A containing formic acid, chitosan, tannic acid, calcium chloride, and nano-titanium dioxide; and agent B containing sodium carbonate, sodium silicate, nano-zinc oxide, and a waterproofing agent; agents A and B are sprayed sequentially onto the surface of the board blank; and the fiberboard is then hot-pressed. This method improves hardness and flame retardancy through a surface mineralization layer and photocatalytically degrades odor, primarily for use as a drilling pad for printed circuit boards, as a substrate for home decoration, and as a buffer layer for engineered wood products.

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