Protective glass plate with the property of impact stress resistance
US12410089B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 2019 |
| Grant date | Sep 9, 2025 |
| Priority date | — |
| Expiry date | Oct 2, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C2203/52
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A protective glass plate with the property of impact stress resistance, and the composition for making the protective glass plate comprising the following components by mass percent: SiO2: 59-63.5%, Al2O3: 11.5-16.5%, Na2O: 11.5-15.5%, K2O: 0.8-6%, MgO: 4-8.5%, B2O3: 0-1.0%, and ZrO2: 0%; when 0.3 mm<T<2.0 mm, and 0.5h≤t≤8h, CS satisfies the following relationship: 9.597Ln(t)+710≤CS≤−5.299t2+50.28t+765; when 2.0 mm≤T≤4.0 mm, and 4h≤t≤150h, CS satisfies the following relationship: 0.003t2−2.167t+858≤CS≤−61.4Ln(t)+1060; wherein T is the thickness of the glass plate and has the unit of mm; t is the chemical strengthening time and has the unit of h; and CS is the surface compressive stress generated by chemical strengthening and has the unit of MPa. The protective glass plate has an excellent property of impact resistance, and the maximum glass fragment size of the broken glass may be controlled within the range of 10-30 mm in length and 1-3 mm in width, thus it is applicable for large-scale industrial production.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.