GLASSES HAVING IMPROVED DROP PERFORMANCE
Chemically strengthened glass articles exhibiting superior resistance to damage when dropped onto an abrasive surface. The strengthened glass article has a stress profile in which the compressive and tensile stresses within the article vary as a function of the thickness t of the glass article. The...
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| creator | SCHNEIDER, Vitor Marino ORAM, Pascale |
| description | Chemically strengthened glass articles exhibiting superior resistance to damage when dropped onto an abrasive surface. The strengthened glass article has a stress profile in which the compressive and tensile stresses within the article vary as a function of the thickness t of the glass article. The stress profile has a first region extending from the surface of the glass article to a depth d1 into the glass, wherein d1 ≤ 0.025t or ≤ 20 µm and has a maximum compressive stress of at least about 280 MPa at the surface, a second region extending from a depth of at least d1 to a second depth d2 and having a local compressive stress maximum, and a third region extending from a third depth d3 in the glass to a depth of compression DOC, wherein d2 ≤ d3 and DOC ≥ 0.15t. A method of strengthening a glass article to provide resistance to damage when dropped is also provided. |
| format | Patent |
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The strengthened glass article has a stress profile in which the compressive and tensile stresses within the article vary as a function of the thickness t of the glass article. The stress profile has a first region extending from the surface of the glass article to a depth d1 into the glass, wherein d1 ≤ 0.025t or ≤ 20 µm and has a maximum compressive stress of at least about 280 MPa at the surface, a second region extending from a depth of at least d1 to a second depth d2 and having a local compressive stress maximum, and a third region extending from a third depth d3 in the glass to a depth of compression DOC, wherein d2 ≤ d3 and DOC ≥ 0.15t. 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A method of strengthening a glass article to provide resistance to damage when dropped is also provided.</description><subject>CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS</subject><subject>CHEMISTRY</subject><subject>GLASS</subject><subject>JOINING GLASS TO GLASS OR OTHER MATERIALS</subject><subject>METALLURGY</subject><subject>MINERAL OR SLAG WOOL</subject><subject>SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS</subject><subject>SURFACE TREATMENT OF GLASS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2021</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZNBw93EMDnYNVvBwDPP0c1fw9A0I8g9zdVFwCfIPUAhwDXLzD_J19HN25WFgTUvMKU7lhdLcDApuriHOHrqpBfnxqcUFicmpeakl8a4BxiZmFpbGRk6GxkQoAQDPBSPb</recordid><startdate>20211013</startdate><enddate>20211013</enddate><creator>SCHNEIDER, Vitor Marino</creator><creator>ORAM, Pascale</creator><scope>EVB</scope></search><sort><creationdate>20211013</creationdate><title>GLASSES HAVING IMPROVED DROP PERFORMANCE</title><author>SCHNEIDER, Vitor Marino ; ORAM, Pascale</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_EP3468932B13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre ; ger</language><creationdate>2021</creationdate><topic>CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS</topic><topic>CHEMISTRY</topic><topic>GLASS</topic><topic>JOINING GLASS TO GLASS OR OTHER MATERIALS</topic><topic>METALLURGY</topic><topic>MINERAL OR SLAG WOOL</topic><topic>SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS</topic><topic>SURFACE TREATMENT OF GLASS</topic><toplevel>online_resources</toplevel><creatorcontrib>SCHNEIDER, Vitor Marino</creatorcontrib><creatorcontrib>ORAM, Pascale</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>SCHNEIDER, Vitor Marino</au><au>ORAM, Pascale</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>GLASSES HAVING IMPROVED DROP PERFORMANCE</title><date>2021-10-13</date><risdate>2021</risdate><abstract>Chemically strengthened glass articles exhibiting superior resistance to damage when dropped onto an abrasive surface. The strengthened glass article has a stress profile in which the compressive and tensile stresses within the article vary as a function of the thickness t of the glass article. The stress profile has a first region extending from the surface of the glass article to a depth d1 into the glass, wherein d1 ≤ 0.025t or ≤ 20 µm and has a maximum compressive stress of at least about 280 MPa at the surface, a second region extending from a depth of at least d1 to a second depth d2 and having a local compressive stress maximum, and a third region extending from a third depth d3 in the glass to a depth of compression DOC, wherein d2 ≤ d3 and DOC ≥ 0.15t. A method of strengthening a glass article to provide resistance to damage when dropped is also provided.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMISTRY GLASS JOINING GLASS TO GLASS OR OTHER MATERIALS METALLURGY MINERAL OR SLAG WOOL SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS SURFACE TREATMENT OF GLASS |
| title | GLASSES HAVING IMPROVED DROP PERFORMANCE |
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