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AssigneeAsahi Glass Company, Limited
InventorsSeiji HIGASHI, Chikaya Tamitsuji
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To provide an ethylene/tetrafluoroethylene (ETFE) copolymer molded product of which the surface has a high hydrophilicity and which is excellent in the light transmission property; and a method for producing the molded product. A method for producing an ETFE copolymer molded product comprising a substrate 12 made of a material containing at least 50 mass % of an ETFE copolymer, and a fluorine-doped silicon oxide film 14 formed on the surface of the substrate 12, characterized by supplying electric power between electrodes so that the electrical power density between the electrodes becomes from 0.5 to 1.1 W/cm3 to cause discharge and thus to plasmatize the following mixed gas so as to form the silicon oxide film 14 on the substrate 12: Mixed gas comprising silicon tetrafluoride, oxygen and a hydrocarbon, wherein the atomic ratio of oxygen atoms to carbon atoms (O/C) is from 1 to 10, and the atomic ratio of oxygen atoms to silicon atoms (O/Si) is from 1.7 to 25.
A method for producing an ethylene/tetrafluoroethylene copolymer molded product comprising a substrate made of a material containing at least 50 mass % of an ethylene/tetrafluoroethylene copolymer, and a fluorine-doped silicon oxide film formed on the surface of the substrate, characterized by supplying electric power between electrodes so that the electrical power density between the electrodes becomes from 0.5 to 1.1 W/cm3 to cause discharge and thus to plasmatize the following mixed gas so as to form the silicon oxide film on the substrate:
An ethylene/tetrafluoroethylene copolymer molded product comprising a substrate made of a material containing at least 50 mass % of an ethylene/tetrafluoroethylene copolymer, and a fluorine-doped silicon oxide film formed on the surface of the substrate, characterized in that in the silicon oxide film, the atomic ratio of oxygen atoms to silicon atoms (O/Si) is from 1.6 to 2.5, and the atomic ratio of fluorine atoms to silicon atom, (F/Si) is from 0.05 to 0.50, the contact angle of the silicon oxide film to water is at most 20°, and an A light source visible transmittance of the ethylene/tetrafluoroethylene copolymer molded product is from 93 to 100%.
Dependencies are inferred from the claim text.