| 摘要 |
PURPOSE: To enable a multi-functional material to sufficiently exhibit a photocatalytic function by embedding and holding a part of photocatalytic particles which form a base layer of a photocatalytic lamination, in a thermoplastic substrate, and by applying photocatalytic particles on the outer surface layer so that their outer surfaces are exposed to the atmosphere, and they are coupled together. CONSTITUTION: A photocatalytic layer 2 formed of photocatalytic particles such as TiO2 particles or the like, is formed over the outer surface of a thermoplastic substrate 1. At this time, the photocatalytic layer is slightly bonded to the substrate so that they are prevented from dropping therefrom during firing which is carried out later. Then, they are heated, and accordingly, a photocatalytic particles 2a in a lower layer on the substrate side among the photocatalytic layers 2, are precipitated in the melted substrate 1. Accordingly, when the substrate 1 is solidified, the particles are partly embedded in the substrate 1 so as to be held thereto. Meanwhile, the photocatalytic particles 2b at the outer surface layer making contact with the ambient air, are, in part, bonded together by the intermolecular force therebetween and the sintering by the firing. The remaining particles are separated from one another. Further, the outer surfaces of the particles 2b at the outer surface layer are exposed to the ambient air. |
