Tempered
Glass
Tempered glass is made by heating
flat glass to just below its softening
temperature and suddenly chilling
it with jets of cold air. It results
the outer skins under powerful
compressive stress and the interior
with severe tensile stress. In
consequence, the impact applied
to the glass will be overcome
by the compressional stress on
the surfaces to assure safety
of use.
|
|
 |
Benefits
| • |
No
tong marks on the
glass as TGI adopts
the horizontally tempering
process. |
| • |
5
times harder than
ordinary annealed
glass. |
| • |
Once
breakage occurs, the
glass disintegrates
into small cubical
fragments which are
relatively harmless
to human body. |
| • |
It
withstands abrupt
change of temperature.
For example, a piece
of 5mm tolerate the
temperature variations
within the range of
200°C. |
|
| |
|
| back
to top |
|
Applications
| • |
Automobile,
train, vessel, architecture,
furniture, automatic
door, escalator, fireplace,
etc. |
|
|
| back
to top |
|
Specification
| • |
Thickness |
3~19mm |
| • |
Max.size |
96"
x 284" (2438mm
x 7213mm) |
|
|
| back
to top |
|
|
Heat
Soak Test
TGI
employs the heat soak
testing system from Finland’s
Tamglass to detect occasional
occurrence of nickel sulfide
(NiS) inclusions in tempered
glass. Under strictly
controlled temperatures,
high- temperature α
-NiS converts to low-temperature
β-NiS which accompanies
a 2.4% expansion in volume
and causes the glass to
break if NiS inclusion
is located at tensile
stress. The test reduces
the frequency and risk
of spontaneous breakage
of tempered glass after
installation.
Tempered glass is heat
soaked for 2-8 hours (T2)
at a constant temperature
of 290°C±10°C
(DIN standard states 8
hours) and then allowed
to return to room temperature
over a specified time.
Heat
Soak Test Process and
Temperature Changes
|
|
| back
to top |
|
Portfolio
|
|
