Strengthened glass articles with separation features
A technology for strengthening glass and glass products, which can be used in glass manufacturing equipment, glass cutting devices, manufacturing tools, etc., and can solve problems such as high cost, safety problems, and composition destruction.
Active Publication Date: 2021-04-13
CORNING INC
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Problems solved by technology
[0007] One of the major disadvantages of using glass containers for pharmaceutical packaging and other applications is the mechanical fragility of glass
Breakage of such glass containers can be costly due to drug loss, and can also create safety concerns, such as the presence of glass particles within the container, destruction of the composition contained in the container, or other safety issues
Method used
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Embodiment
[0052] like Figure 5 A laser engraved pattern 72 is shown formed. The output of a UV (355 nm wavelength), nanosecond pulsed laser was focused within the center layer (CT=37 MPa) of the ion-exchanged glass article 70 in the form of a cartridge. The barrel 70 has a diameter of about 12mm and a wall thickness of about 0.7mm. The glass article 70 was rotated in the chuck at approximately 400 rpm while being translated in the axial direction at a speed allowing a 0.5 mm pitch to be formed. The duration of laser irradiation was controlled to form three turns in the sidewall of the glass article as shown, and the laser power was in the range of 2.5W - 3W.
[0053] refer to Image 6 , a crack 74 is mechanically induced in the bottom of the glazing, which crack 74 propagates in the axial direction. Crack growth was observed and then stopped at the first turn of encounter. Subsequently, crack 74 propagates along the first turn around the glass body, forming separation line 76, and...
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Abstract
A method of forming a strengthened glass article is provided. The method includes providing a strengthened glass article. The strengthened glass article is in the form of a container including a sidewall having an exterior surface and an interior surface that encloses an interior volume. The sidewall has an exterior strengthened surface layer that includes the exterior surface, an interior strengthened surface layer that includes the interior surface and a central layer between the exterior strengthened surface layer and the interior strengthened surface layer that is under a tensile stress. A laser-induced intended line of separation is formed in the central layer at a predetermined depth between the exterior strengthened surface layer and the interior strengthened surface layer by irradiating the sidewall with a laser without separating the glass article.
Description
[0001] Cross References to Related Applications [0002] This application claims the benefit of priority under 35 U.S.C § 120 to U.S. Provisional Application Serial No. 62 / 726,578, filed September 4, 2018, which is based upon the contents of that application and is incorporated herein by reference in its entirety. [0003] background technical field [0004] This specification relates generally to glass articles, and in particular to strengthened glass articles having separation features. Background technique [0005] Historically, glass has been used as the material of choice for packaging pharmaceuticals due to its airtightness, optical clarity and superior chemical durability relative to other materials. Specifically, glass used in pharmaceutical packaging needs to be chemically durable enough without compromising the stability of the pharmaceutical formulations contained within. Glasses with suitable chemical durability include those glass compositions included in the ...
Claims
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IPC IPC(8): C03C23/00B23K26/00C03B33/02B41M5/26C03C21/00
CPCC03C23/0025C03B33/0222C03C21/002B23K26/53B23K26/0624C03B33/04C03B33/06B65D1/0215B65D1/42B23K26/364
Inventor R·V·西金伯顿达尔曼W·J·米勒K·R·罗辛顿A·M·斯特列利佐夫
Owner CORNING INC