VENTILATION FILTER IMPARTED WITH OIL REPELLENCY

摘要

PROBLEM TO BE SOLVED: To provide a ventilation filter that can maintain oil-repellent properties excellent in high temperature environment.SOLUTION: A ventilation filter according to the present invention has a surface coated with an oil-repellent agent. The oil-repellent agent comprises a copolymer of a monomer containing a linear fluorinated hydrocarbon group and a crosslinkable monomer. The crosslinkable monomer comprises at least one monomer selected from a monomer containing an alkoxy group, a monomer containing a hydroxy group and a monomer containing a carboxyl group.