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Glass containers with delamination resistance and improved damage tolerance

  • US 10,307,334 B2
  • Filed: 07/21/2017
  • Issued: 06/04/2019
  • Est. Priority Date: 11/30/2012
  • Status: Active Grant
First Claim
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1. A delamination resistant glass pharmaceutical package comprising:

  • a glass body formed from a Type 1 glass composition according to ASTM Standard E438-92(2011), the glass body having a wall portion with an inner surface and an outer surface, wherein the glass body forms the inner surface of the glass pharmaceutical package, wherein the glass pharmaceutical package does not comprise a boron-rich layer on the inner surface of the glass body, and wherein the glass body is formed from a glass tube;

    the glass body has at least a class A2 base resistance or better according to ISO 695, at least a type HGB2 hydrolytic resistance or better according to ISO 719 and Type 1 chemical durability according to USP <

    660>

    ;

    an interior region extending from about 10 nm below the inner surface and having a persistent layer homogeneity such that an extrema in a layer concentration of each constituent component of the glass composition in the interior region is greater than or equal to about 80% and less than or equal to about 120% of a concentration of the same constituent component in the glass composition at the mid-point of the thickness of the glass body when the glass body is in an as-formed condition; and

    a surface region extending over the inner surface and having a persistent surface homogeneity such that the glass body is resistant to delamination such that for a discrete point on the inner surface of the glass body, an extrema of a surface concentration of each constituent component of the glass composition in the surface region at the discrete point is greater than or equal to about 70% and less than or equal to about 130% of the same constituent component in the surface region at any second discrete point on the inner surface of the glass body when the glass body is in an as-formed condition.

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