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US 5,919,328 AGranted
Blood collection tube assembly
AssigneeBecton, Dickinson and Company
InventorsYelena G. Tropsha, Christopher J. Knors, Susan L. Burkett, Bryan Soo Wong
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Abstract
The present invention is a plastic container coated with a multi-layer barrier coating. The multi-layer barrier coating is useful for providing an effective barrier against gas permeability in containers and for extending shelf-life of containers, especially plastic evacuated blood collection devices.
Claims2
A method of depositing a multilayer barrier coating on a plastic substrate in a previously evacuated chamber comprising:
- (a) selecting a curable component comprising:
- i) polyfunctional acrylates, or ii) mixtures of monoacrylates and polyfunctional acrylates;
- (b) flash vaporizing said component into said chamber;
- (c) condensing a first layer of a film of vaporized component onto the outer surface of said container;
- (d) curing said film;
- (e) vaporizing an organotin component and admixing the volatilized organotin component with an oxidizer component and optionally an inert gas component to form a gas stream exterior to the chamber;
- (f) establishing a glow discharge plasma in the chamber from one or more of the gas stream components;
- (g) controllably flowing the gas stream into the plasma while confining at least a portion of the plasma therein;
- (h) depositing a layer of tin oxide adjacent said first layer;
- (i) vaporizing an organosilicon component and admixing the volatilized organosilicon component with an oxidizer component and optionally an inert gas component to form a gas stream exterior to the chamber;
- (j) establishing a glow discharge plasma in the chamber from one or more of the gas stream components;
- (k) controllably flowing the gas stream into the plasma while confining at least a portion of the plasma therein;
- (l) depositing a third layer of silicon oxide adjacent said second layer;
- and
- (m) dip coating a fourth layer of PVDC onto said third layer.
12 more elements
Dependencies are inferred from the claim text.