| 摘要 |
PROBLEM TO BE SOLVED: To provide a plastic bottle for carbonated beverage which is capable of holding excellent gas barrier properties even under an environment at a higher temperature than the room temperature. SOLUTION: The plastic bottle is equipped with an inside gas barrier film formed by plasma CVD the inner face side, and the volume increasing ratio under the environment at a higher temperature than the room temperature is 8.0% or less. The volume increasing ratio under the environment at higher temperature than the room temperature has a value obtained by filling carbonated water with a gas volume of 4.2 and after storing it at 40°C for 2 weeks, or a value obtained by filling a carbonated water with a gas volume of 2.8 and after heat treating the central part of a container at 65°C for at least 10 minutes. The gas barrier film is an amorphous carbon film wherein carbon formed by the plasma CVD from a starting raw material containing carbon atom is a main constituent element, or a silicon oxide-containing film formed from a starting raw material including an organosilicone compound and having an atomic Si/O ratio of 1/1.5-1/2.2. The plastic bottle is a polyester bottle. COPYRIGHT: (C)2007,JPO&INPIT
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