| 摘要 |
PURPOSE:To prevent the generation of an unpleasant smell by eliminating the generation of fungi on the surface of a fin by providing a hydrophilic film based on polyvinyl alcohol having an antifungal agent added thereto to the surface of an aluminum fin material for a heat exchanger. CONSTITUTION:In an aluminum fin material for a heat exchanger, a polyvinyl alcohol type hydrophilic film containing 1 - 20% of an antifungal agent on a dry film wt. basis is provided to the surface of an aluminum material in a film thickness of 0.1 - 2.0mum. As the antifungal agent, for example, one based on tetrachloroisophthalonitrile can be used and, when the addition amount thereof is below 11% by wt. of a dry film, good antifungas properties are not obtained and, when exceeds 20%, adverse effect is exerted on the hydrophilicity of the hydrophilic film or the close adhesiveness thereof to the aluminum material. The hydrophilic film is formed by baking after applied to the surface of an aluminum plate mainly by roll coating method. |
