GLASS LAMINATES HAVING DETERMINED STRESS PROFILES AND METHODS OF MAKING THE SAME

    公开(公告)号:US20220212446A1

    公开(公告)日:2022-07-07

    申请号:US17605103

    申请日:2020-04-13

    Abstract: A laminated glass article comprises a core layer comprising a core glass composition having an average core coefficient of thermal expansion (CTEcore) and a clad layer directly adjacent to the core layer and comprising a clad glass composition having an average clad coefficient of thermal expansion (CTEclad) that is less than the CTEcore such that the clad layer is in compression and the core layer is in tension. A compressive stress of the clad layer increases with increasing distance from the outer surface of the clad layer, transitions to a minimum tensile stress as a step-change at an interface region between the core layer and the clad layer, and a magnitude of the tensile stress increases continuously to a maximum tensile stress in the core layer. Other stress profiles, and methods of preparing laminated glass articles are also disclosed.

    LOW STORED TENSILE ENERGY DICING GLASS AND PREFERENTIAL CRACK FRAGMENTATION

    公开(公告)号:US20220017400A1

    公开(公告)日:2022-01-20

    申请号:US17294912

    申请日:2019-11-08

    Abstract: A glass substrate comprises: a first position, wherein a tensile stress of the glass substrate is insufficient to cause fragmentation of the glass substrate into small pieces upon fracture of the glass substrate; and a second position, wherein the glass substrate is bent relative to the first position, and wherein the tensile stress of the glass substrate is sufficient to cause fragmentation of the glass substrate into small pieces upon fracture of the glass substrate. The glass substrate can include a first surface and a second surface. In the first position, the first surface and the second surface of the glass substrate can be planar. In the second position, the first surface and the second surface of the glass substrate can be planar. The small pieces can be generally cubic. In the second position, the glass substrate can be bent uniaxially along a bend axis of the glass substrate.

    COMPENSATED MOLDS FOR MANUFACTURING GLASS-BASED ARTICLES HAVING NON-UNIFORM THICKNESSES

    公开(公告)号:US20240336520A1

    公开(公告)日:2024-10-10

    申请号:US18747539

    申请日:2024-06-19

    CPC classification number: C03C21/002 C03B23/023

    Abstract: Methods for compensating for warp typically exhibited by glass-based articles having non-uniform thicknesses as a result of ion exchange strengthening are provided. The methods include producing a molding surface of a mold based on a measurement of warp obtained by a specified ion exchange strengthening of a glass-based substrate of non-uniform thickness, such that the molding surface offsets the warp. Glass-based substrates resulting from the mold can then be exposed to the specified ion exchange strengthening and form glass-based articles that are substantially free of warp.

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