Plastic container for liquid medicine and method of storing and recovering liquid medicine
AssigneeMitsubishi Shoji Plastics Corporation
InventorsKenichi Hama, Tsuyoshi Kage
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Abstract
A plastic container for liquid medicine, which, concerning the effective components of liquid medicine, is capable of prevention of deterioration in quality due to mixing of oxygen and water vapor, prevention of variation in concentration due to water volatilization and moisture absorption, etc. A plastic container for liquid medicine, which is a plastic container internally coated with DLC (diamond-like carbon) film wherein water vapor permeability is 0–0.006 g/container/day and oxygen permeability is 0–0.011 ml/container/day, such properties being obtained by optimizing the three conditions, composition, density and film thickness of the DLC film.
Claims6
A plastic container for liquid medicine having a DLC (Diamond Like Carbon) film formed on the inner surfaces thereof, wherein the water vapor permeability is 0˜0.006 g/container/day, and the oxygen permeability is 0˜0.01 ml/container/day when liquid medicine is sealed in said plastic container by appropriately changing the three conditions of composition, density and film thickness of said DLC film so that the hydrogen atomic % of said DLC film is greater than or equal to 10 atomic % and less than 50 atomic %, the density of said DLC film is greater than 1.3 g/cm3 and less than or equal to 1.6 g/cm3, and the film thickness of said DLC film lies within the range of 180˜350Å.
Dependencies are inferred from the claim text.