GLASS ARTICLES EXHIBITING IMPROVED FRACTURE PERFORMANCE

The invention relates to a strengthened glass article comprising: a first surface and a second surface opposing the first surface defining a thickness (t) of about 1.1 mm or less; a compressive stress layer extending from the first surface to a depth of compression (DOC) of 0.17-t or more, wherein t...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Demartino, Steven Edward, Smith, Charlene Marie, Tang, Zhongzhi, Lyon, Jennifer Lynn, Kohli, Jeffrey Todd, Fabian, Michelle Dawn
Format: Patent
Sprache:eng
Schlagworte:
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Beschreibung
Zusammenfassung:The invention relates to a strengthened glass article comprising: a first surface and a second surface opposing the first surface defining a thickness (t) of about 1.1 mm or less; a compressive stress layer extending from the first surface to a depth of compression (DOC) of 0.17-t or more, wherein the compressive stress layer comprises a surface compressive stress of 624.5 MPa or greater; and a central tension (CT) that is 200 MPa or more, wherein the strengthened glass article average face drop test height for five samples is over 200 centimeters when dropped onto 30 grit sandpaper, and wherein, after the glass article fractures according to a Frangibility Test, at least one of: (a) the glass article comprises a plurality of fragments, wherein the glass article comprises a first weight prior to fracture and wherein the plurality of fragments comprises an ejected portion of fragments and a non-ejected portion of fragments, the non-ejected portion of fragments having a second weight, and the difference between the first weight and the second weight is 1% or less of the first weight; (b) the glass article comprises a plurality of fragments, wherein the plurality of fragments comprises an ejected portion of fragments, wherein the ejected portion of fragments comprises 10% or less of the plurality of fragments; or (c) wherein, the glass article is laminated to a containment layer prior to the Frangibility Test, and after being fractured according to a Frangibility Test, the glass article comprises fractures, and wherein at least 5% of the fractures extend only partially through the thickness.