Abstract: Disclosed is a method of manufacturing floors including wood powder in order to exhibit a texture similar to that of natural wood. The floor including wood powder of the invention is composed of a main sheet formed of synthetic resin, a wood powder layer formed on the main sheet using a mixture of wood powder and synthetic resin, and a printing layer formed on the wood powder layer and having a non-toxic portion. The printing layer is attached when heated due to changes in the melting point of the main sheet, and the non-toxic portion of the printing layer is formed of any one material selected from among polypropylene, polyethylene, ethylene-vinyl acetate copolymer, and oriented polypropylene.

Abstract: Disclosed herein is a coating method using a synthetic resin including nano-silver powder via ultrasonic waves, including mixing nano-silver powder and a synthetic resin using an ultrasonic distributor, to prepare a mixture, which is then periodically pumped and coated onto a predetermined target. In the application method of the current invention, the mixing process by ultrasonic dispersion does not crush the nano-silver particles, and thus, the unique properties of nano-silver can be maximally exhibited after application. Further, in cases where the mixture is used over a long time or is intermittently used, precipitation of the nano-silver particles due to a difference in specific gravity between the nano-silver and the synthetic resin can be prevented by periodically cycling the mixture using a cycling pump. Furthermore, the long time required for the mixing process can be reduced by diluting the above mixture with 5 times the amount of the same synthetic resin as the synthetic resin used in the mixture.