| 摘要 |
PURPOSE:To improve the hydrophilicity of the surface of a molding of a polymeric material by irradiating the molding with ultraviolet rays emitted from a dielectric barrier discharge lamp in which the maximum value of the wavelength of emitted light is in the dielectric region of a specified value. CONSTITUTION:A gas for discharge containing at least one member selected from among Xe, Ar, Kr and F is blown into a treatment duct 1 under an adjusted pressure of 0.2 to several atm through a feed opening 13 for fluid to be treated. A molding 3 of a polymeric material such as polyethylene terephthalate is irradiated with ultraviolet rays emitted from dielectric barrier discharge lamps 2a to 2e in each of which the maximum value of the wavelength of emitted light is 180nm or below and is in at least one region selected from among the regions of 160-190nm, 140-160nm, 107-165nm and 130-190nm. By the ultraviolet irradiation, the oxygen, carbon and moisture present on the surface of the molding 3 can be converted into OH groups and COOH groups, which are then introduced into the suface of the molding to make it hydrophilic or even more hydrophilic. |
