The method use to produce tempered glass
is the Heat treating : Where the annealed glass is subjected to a special
heat-treatment in which it is heated to about 680°C and afterwards
cooled. If it is cooled rapidly, the glass is up to four times stronger
then annealed glass and its breaks into many small fragments (fully-tempered).
If it is cooled slowly, the glass is twice as strong as annealed glass
and the fragments of the broken glass are linear and more likely to
remain in the frame.
The heat treating process produces highly
desirable conditions of induced stress (described below) which result
in additional strength, resistance to thermal stress, and impact resistance.
Mechanical : Tempered glass has an impact
strength which is 5 times higher than that of the annealed flat glass
of the same thickness, as well as 3 to 4 times higher resistance to
Thermal : The tempered glass can withstand quick temperaure change;
for example, tempered glass of 5 mm thickness can tolerate a temperature
change of 250°C.
Tempered glass possesses the basic optical qualities of annealed glass
Ces caractéristiques permettent aux produits trempés d’être
équipés de pièces métalliques de fixation
ou de rotation et dans certains cas, de participer à la tenue
mécanique de l’installation.
On rare occasions when tempered glass in these applications fails, it
may fail completely from the opening, individual fragments from tempered
glass are relatively small and harmless.
Tempered glass cannot be cut or modified following heat treatment.
purchase : glass-tempering furnace, enables us to treat thicknesses
from 3 mm
to 25 mm.
The glass density is 2.5.
Tolerance on Thickness : Clear
and tinted glass
thicknesses3 - 4 - 5 -
Ep. 8 - 10 - 12
± 0.2 mm
± 0.3 mm
± 0.5 mm
± 1 mm
Tolerance on dimensions of congestion
+ 0 mm
- 3 mm
Edge work tolerance (holes) :
- On dimensions : D.< 50 mm. 0 + 1 mm. D = 50 à
100 mm : 0 + 2 mm
- On positioning
: ± 1.5 mm (TS. diameters)
Edge work tolerance (notches) :
- On dimensions : 0 + 2 mm
- On positioning : ± 2.5 mm
13, rue du ballon
93165 Noisy-Le-Grand Cedex France