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.

The application describes a method of scavenging formaldehyde from a wooden composite comprising urea-formaldehyde or melamine urea-formaldehyde by providing a combination of formaldehyde scavengers in the face and core layers of the composite and further describes the composite produced with these scavengers.

This disclosure is directed to methods of separating wood veneer material by property measurements, and thereafter improving the properties of veneer material with property values lower than a target threshold value, until those materials meet or exceed that threshold values. In some aspects of the disclosure, veneer materials are prepared, non-destructively measured, and separated into passing and failing material collections. The failing material collection may then be treated to improve the density and flexural modulus of the material therein. Also disclosed herein are products and materials incorporating the treated veneer materials according to the disclosed methods.

To provide a board material processing composition allowing for production of a board material laminate that is non-combustible and is excellent in adhesion performance. In order to solve this problem, a board material processing composition inhibiting combustion of a board material due to heating, comprises: a carbonization promotion component, being inorganic, promoting carbonization of an organic component within the board material at the heating; a chain inhibition component, being inorganic, inhibiting a reaction chain to a neighboring component due to a product of endothermic decomposition generated at the heating; and binder particles, being inorganic and hydrophobic, bonding the organic component within the board material to the carbonization promotion component and the chain inhibition component, wherein the carbonization promotion component includes boric acid, the chain inhibition component includes ammonium dihydrogen phosphate, and the binder particles include silica sand.

A wood preservative composition comprising 4,5-dichloro-2-octylisothiazol-3(2H)-one, a method of treating a wood substrate therewith, and a wood product produced therefrom are provided. The wood preservative composition comprises at least 0.5% by weight of DCOI based on the total weight of the composition and a retaining additive comprising a solvent-borne polymeric resin, a wax, or a combination thereof. A weight ratio of the DCOI to the retaining additive in the composition is in a range of 1:5 to 5:1.

A wood preservative composition comprising 4.5-dichloro-2-octylisothiazol-3 (2H)-one, a method of treating a wood substrate therewith, and a wood product produced therefrom are provided. The wood preservative composition comprises at least 10% by weight of 4.5-dichloro-2-octylisothiazol-3-one (DCOI) based on the total weight of the composition, at least 10% by weight of a non-polar organic solvent based on the total weight of the composition, and at least 1% by weight of a polar organic solvent based on the total weight of the composition. A weight ratio of the non-polar organic solvent to the polar organic solvent is in a range of 80:1 to 1:8.

This disclosure is directed to methods of separating wood veneer material by property measurements, and thereafter improving the properties of veneer material with property values lower than a target threshold value, until those materials meet or exceed that threshold values. In some aspects of the disclosure, veneer materials are prepared, non-destructively measured, and separated into passing and failing material collections. The failing material collection may then be treated to improve the density and flexural modulus of the material therein. Also disclosed herein are products and materials incorporating the treated veneer materials according to the disclosed methods.

A method of manufacturing engineered wood is provided, the method including: feeding wood through a processor while exposing the wood to compressive and tensile forces to produce naturally oriented strands of fibers; adding an adhesive to naturally oriented strands of fibers to provide adhesive covered strands; feeding the adhesive covered strands into a press; applying a first pressure to the adhesive covered strands to provide a pressed wood with a selected first dimension and a selected second dimension; and applying a second pressure normal to the first pressure to the pressed wood to provide an engineered wood having the selected first dimension, the selected second dimension and a selected third dimension and a selected density. An installation for manufacturing the engineered wood is also provided.

A process is provided for treating wood products including lumber, plywood and other engineered wood products comprising the steps of applying an aqueous fire-retardant impregnate and applying a coating to the surface of the wood product. In one embodiment, said process confers fire-retardant properties to the wood products sufficient to pass the extended burn test of ASTM E-84. The present invention also provides fire retardant wood products.

Disclosed are novel metallic nanoparticles coated with a thin protective carbon shell, and three-dimensional nano-metallic sponges; methods of preparation of the nanoparticles; and uses for these novel materials, including wood preservation, strengthening of polymer and fiber/polymer building materials, and catalysis.