| 摘要 |
PROBLEM TO BE SOLVED: To convert condensation water drops into a water film to thereby decrease the amount of water drops dripping from the ceiling of a bathroom by forming the ceiling from a highly hydrophilic resin member having hydrophilic groups on its surface. SOLUTION: The surface hydrophilicity of the highly hydrophilic resin member is achieved preferably by introducing at least one kind of hydrophilic groups selected from among -SO3H, -SO3M, -OSO3M, -COOM, -NR3X, -COOH, -CO, -NH2, -CN,-OH, -NHCONH2, and -(OCH2CH2)n groups into the surface thereof. In these groups, R is an alkyl; M is an alkali metal or NH4; and X isahalogen. The hydrophilic groups are introduced preferably by a corona treatment, a plasma treatment, or a treatment with a gas mixture of fluorine and oxygen. Preferably, the highly hydrophilic resin member having hydrophilic groups introduced into the surface thereof has a contact angle of water of 40 deg. or lower. Preferably, the highly hydrophilic resin is based on a resin such as a polyolefin resin, an (un)saturated polyester resin, a PS resin, an ABS resin, an AS resin, a polyacetal resin, or a polycarbonate resin. |
