Toughened Glass
Toughened or tempered glass is a type of safety glass processed by controlled thermal or chemical treatments to increase its strength compared with normal glass. Tempering puts the outer surfaces into compression and the inner surfaces into tension. Such stresses cause the glass, when broken, to crumble into small granular chunks instead of splintering into jagged shards as plate glass (a.k.a. annealed glass) creates. The granular chunks are less likely to cause injury. As a result of its safety and strength, toughened glass is used in a variety of demanding applications, including passenger vehicle windows, shower doors, architectural glass doors and tables, refrigerator trays, mobile screen protectors, as a component of bulletproof glass, for diving masks, and various types of plates and cookware.
Benefits
Impact Resistance – A surface compression of over 10,000 PSI(69MPa) imparts about five times the impact and mechanical strength of annealed glass of the same thickness.
Thermal Cracking Resistance – Tempered Safety Glass will resist temperatures of up to approximately 295 C an temperature difference of up to approximately 250 C. In a range frm -20 C to 300 C.
Safety – When broken, Tempered Glass / Toughened Glass become small granules, which will not exert substantial hurt to human body.
Optical Clarity – Tempered safety glass may contain some minor visual imperfection of distortion through the heating
Windload – Recommended by all reputed Architects to use the Toughened Glass in high rise buildings because of its’ ability to withstand heavy wind loads.
Size available
Available in 4, 5,6, 8, 10, 12, 15, 19 mm thickness.
Maximum size3mtrs * 5mtrs
Minimum size 300 mm diagonal
WHY MIRAGE
• State of the art facility with Experienced Staff
• Toughened, Laminated and Insulated Glass available under one roof
• Availability of Flat & Bend Glass
• Availability of Designer Glass
• Best Quality at Economical Price
• Fast Grievance Redressal System
• Flat as well as bend glass possible.
• Best optics and least distortion.
TOUGHENED GLASS VS HEAT STRENGTHENED VS ANNEALED GLASS
| Properties | Annealed Glass | Tempered Glass | Heat strengthened glass |
|---|---|---|---|
| Thermal stress | Upto 50°C | Upto 250°C | Upto 130°C |
| Strength | Not strong | 4 times of annealed | 2 times of annealed |
| Bending strength | 40 N/mm² | 120 – 200 N/mm² | 60 – 100 N/mm² |
| Bending strength | 40 N/mm² | 120 – 200 N/mm² | 60 – 100 N/mm² |
| Design stress | 17 Mpa | 50 Mpa | 27 Mpa |
| Surface compression | Upto 2800 psi (19 MPa) | >10000 psi (69 Mpa) | 3500-7500psi (24-52 Mpa) |
| Safety | Not approved as safety glazing | Approved as safety glazing for most applications | Not approved as safety glazing |
| Site alterations | Possible | Not possible | Not possible |
| Flatness | Very flat | Slight bow and corrugation | Bow and corrugation lower than tempered glass |
| Optics | Very good | Reasonably Good | Comparatively better than tempered glass |
| Lamination | Min 0.38mm PVB | Min 1.52 PVB | Min 1.52 PVB |
| NiS breakage | Non existent | Prone | Extremely rare possibility |
| Heat Soaking | Not required | Recommended | Not necessary |
| Properties | Annealed Glass | Tempered Glass | Heat strengthened glass |
APPLICATIONS OF TOUGHENED GLASS
