Fused quartz container having low levels of surface defects
AssigneeMomentive Performance Materials Quartz, Inc.
InventorsBen Gauthier, Robert Koch, Todd Springer, David Xu, Gloriana Volio
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Abstract
A quartz glass container is shown and described herein. The quartz glass container exhibits a low concentration of surface defects on an inner surface of the container. In aspects hereof, the container may have a surface defect density of 50 or fewer surface defects per square centimeter within a 1 cm band centered 1 cm from the base of the container.
Claims11
A quartz glass pharmaceutical container defining an interior volume and having an upper end, a base end, at least one wall defining an inner surface and an outer surface, wherein the inner surface of the container has a surface feature density of 50 or fewer surface features per square centimeter within a 1 cm band centered 1 cm from the base end of the pharmaceutical container, the surface features having a size of 1 to 200 μm.
A process for forming a plurality of quartz glass containers comprising:
- providing a quartz glass tube having a first open end and second open end opposite the first open end;
- forming one or more features of a container at the first open end;
- forming one or more features of a container at the second open end;
- separating the quartz glass tube at a point distal to each of the first and second open ends, the separating operation providing two containers and forming a bottom of each container, wherein the pharmaceutical packaging container defines an interior volume and having an upper end, a base end, at least one wall defining an inner surface and an outer surface, wherein the inner surface of the container has a surface feature density of 50 or fewer surface features per square centimeter within a 1 cm band centered 1 cm from the base end of the pharmaceutical container, the surface features having a size of 1 to 200 μm.
Dependencies are inferred from the claim text.