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Insulite fabricates heat-strengthened glass on a state-of-the-art
TGL Tamglass electric horizontal oscillating furnace. The TGL furnace
will heat-strengthen 1/8" (3mm) to 3/4" (12mm) thick flat
float glass products. This furnace is equipped with two hearths
for increased output and aspirators for heat-strengthening the new
generation of post heat-treatable vacuum deposited reflective and
low-e glass products available today.
The furnace heats the glass to a uniform temperature
of approximately 1200 degrees Fahrenheit. Ceramic rolls convey the
glass through the furnace at speeds regulated to ensure temperature
uniformity and minimal optical distortions. The heat-strengthening
process parallels the process of tempering, except that the cooling
cycle is less rapid, therefore, creating surface compression levels
less than fully tempered glass.
Heat-strengthened glass has approximately twice the
mechanical and thermal strength of annealed glass of equal thickness.
Heat-strengthened glass normally has a break pattern of large pieces
similar to a break pattern of annealed glass, with other breakage
patterns possible, as illustrated on this sheet. Heat-strengthened
glass is used in areas requiring added strength to the glass but
a larger break pattern than that of tempered glass so that the broken
glass remains in the opening until it can be secured for a replacement.
Heat-strengthened glass cannot be cut or drilled after heat strengthening.
Heat-strengthened glass does not meet safety glazing
requirements of ANSI Z97.1 and CPSC 16 CFR 1201.
Optical quality:
Bow, warp and process roll distortion may be evident. This is an
inherent characteristic of the manufacturing process and is within
the limits set by ASTM Standard C1048.
Sizes limitations:
Minimum: 14" diagonal dimension on each piece.
Maximum: 84" x 144"
Conformances:
ASTM C1036 Standard Specification for Flat Glass.
ASTM C 1048 Standard Specification for Heat-Treated Flat Glass.
For additional information regarding Heat-Strengthened
glass contact Insulite. info@insuliteglass.com |
