Degradable resin molding and production method for degradable resin molding
AssigneeMeidensha Corporation
InventorsToshinori Miura, Mitsuru Kekura, Naoto Kameda
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Abstract
Disclosed is a degradable film (1) in which a barrier layer (3) is disposed on a surface of a water-soluble polymer layer (2). The water-soluble polymer layer (2) is made of a water-soluble polymer such as polyvinyl alcohol or polyvinyl pyrrolidone. The barrier layer (3) is made of silicon oxide or silicon oxynitride. The barrier layer (3) is formed on the water-soluble polymer layer (2) by a CVD process with the supply of a raw material gas containing a precursor of a substance that forms the barrier layer (3), an ozone gas with an oxygen concentration of 20 vol % or higher and an unsaturated hydrocarbon gas to the water-soluble polymer layer (2).
Claims5
A production method of a degradable resin molded article, the degradable resin molded article having a barrier layer disposed on a surface of a water-soluble polymer layer, the water-soluble polymer layer containing polyvinyl alcohol or polyvinyl pyrrolidone, the barrier layer being a silicon oxide film or a silicon oxynitride film, the production method comprising:
- placing the water-soluble polymer layer in a vacuum chamber;
- and
- supplying, to the water-soluble polymer layer placed in the vacuum chamber, an ozone gas with an ozone concentration of 20 vol % or higher, a raw material gas containing a compound containing silicon as a constituent element of the silicon oxide film or the silicon oxynitride film, and an unsaturated hydrocarbon gas, thereby forming the barrier layer on the water-soluble polymer layer,
- wherein the barrier layer has a thickness of 1 nm to 10 um and a water vapor permeability of 1 mg/m2/day to 10 g/m2/day, and
- wherein a flow rate of the ozone gas is in a range of 0.2 to 1000 sccm,
- wherein the ratio of a flow rate of the unsaturated hydrocarbon gas to the flow rate of the ozone gas is in a range of 0.1 to 2, and the ratio of a flow rate of the raw material gas to the flow rate of the ozone gas is 0.001 to 0.1.
Dependencies are inferred from the claim text.