To provide an antifouling noise insulating wall by forming a surface layer having structure microscopically dispersed both of a part showing a hydrophilic property where photocatalytic oxide particulates are exposed to make contact with outside air and a part showing water repellency where water repellent fluorine contained resin is exposed to make contact with the outside air on a surface of a base material.
A surface layer having structure where both of a part showing a hydrophilic property and a part showing water repellency by water repellent fluorine contained resin are microscopically dispersed is formed on a surface of a noise insulating wall base material 10 furnished with a vertical wall 12 and a curved wall 14, hydrophilic attachments are made not to become attached to the part showing water repellency and hydrophobic attachments are made not to become attached to the part showing the hydrophilic property. The hydrophilic property at the part showing the hydrophilic property in accordance with light excitation is maintained by making photocatalytic oxide particulates exist on the part showing the hydrophilic property. Consequently, neither hydrophilic attaching matters nor hydrophobic attaching matters are fastened on a surface of a member, and it is possible to maintain the surface in a clean state.
HAYAKAWA MAKOTO
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