Method to reduce gas transmission
AssigneeBecton, Dickinson and Company
InventorsJoel L. Williams, Susan L. Burkett, Shel McGuire
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Abstract
An irradiated plastic article of reduced gas transmission has a coating of silicon oxide on a surface thereof. A method to reduce gas transmission through a plastic article includes depositing a coating of silicon oxide thereon and irradiating, either prior to or subsequent to depositing the silicon oxide.
Claims4
A method to improve the shelf life of a plastic article comprising depositing a coating of silicon oxide on a surface of a plastic article and subjecting the coated surface to high energy irradiation whereby shelf life is improved by reduced gas transmission through said plastic.
A method to reduce gas transmission through the wall of a plastic sample collection tube comprising:
- a) exposing a plastic sample collection tube to high energy radiation to form a free radical in said plastic;
- and
- b) allowing said radical to react with an oxygen molecule, thereby preventing said molecule from passing through said plastic into said tube.
Dependencies are inferred from the claim text.