“The choice for a safer glass”
Description
Enviro-Lite FT Tempered Glass, also known as Enviro-Lite Toughened glass is produced by re-heating annealed glass to about 650o C, at which points it begins to soften, and then rapidly quenched. This process sets up high compressive stresses at the surfaces with balancing tensile stresses in the centre. The balance stresses give tempered glass an improvement in resistance to wind load, thermal stress and impact.
Besides, this type of glass offers approximately four times the resistance to uniform static loading of annealed glass, greater impact resistance and sufficient strength to withstand solar thermal stress. In the rare event that Enviro-Lite FT Tempered Glass is broken it disintegrates into small, relatively blunt fragments and is unlikely to cause severe injuries as compared to annealed or heat strengthened glass. With the exception of strength and breakage characteristics, Enviro-Lite FT Tempered Glass almost retains the normal properties of annealed glass such as solar and light transmission, color, clarity, softening point, thermal conductivity, chemical resistance, hardness, expansion and deflection.
Enviro-Lite FT Tempered Glass meets Standards for impact performance requirements for flat safety glazing materials for used in buildings and has been tested according to requirements of BS6206, AS2208, ASTM C- 1048, BS 6206, ANZI 97.1, JIS, PSB etc.
Enviro-Lite FT Tempered Glass is recommended for fire knockout panels (not be confused as fire resistant glazing), showers doors, glass entrances and areas where heavy human traffic is expected, such as, shopfronts and balustrades. In addition, Enviro-Lite FT Tempered Glass should be utilized, where glass is subjected to high thermal stress due to unfavourable shadow patterns or poor back ventilation and spandrel area. Enviro-Lite FT Tempered Glass can be laminated together with a high penetration resistant PVB to form a laminated tempered glass that is most effective as a high impact resistant material with security.
Types Available:
Enviro-Lite FT Tempered Glass is available in a wide range of glass types in varying thickness and includes the following:
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Clear and tinted glass
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Pattern Obscure
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Enviro-Shield Reflective Glass
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Pyrolithic Reflective Glass
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Pyrolithic Low Emissivity Glass
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Screen Printed Glass
Handling Precaution
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Tempered Glass cannot be cut or drilled after tempering. Any alterations after tempering such as edges grinding, sandblasting or acid etching may reduce the thickness of the compressive layer, thus reducing its strength, and can cause premature failure.
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A strain pattern, or sometimes referred to as irridescene, sometimes visible under the certain lighting conditions and when viewed at certain angles. This strain pattern is inherent in the tempering process and should not be considered a defect.
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Tempered glass is more prone to spontaneous fracture. Spontaneous fracture is a result of internal inclusions, such as nickel sulfide, which can be found in the glass as a result of the float glass manufacturing process. Though heat soaking of tempered glass can be used to control the breakage, it cannot eliminate such spontaneous fracture.
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The thermal tempering process does not increase surface resistance to scratching or abrasion compared to ordinary glass.