3. NORMAL / ANNEALED GLASS
• PRODUCES LONG
SHARP SPLINTERS
-TOO BRITTLE
-DANGER OF INJURY
• WHEN NOT ANNEALED,
GLASS IS MORE LIKELY
TO CRACK WHEN
EXPOSED TO
TEMPERATURE
CHANGES
5. PROCESSES
Combining two annealed or tempered
glasses together with Polyvinyl Butyral
(PVB)
Bonding these under heat
and pressure
heating annealed glass above its
transition temperature of 564 °C to 620
°C
cooling it rapidly
Heating glass to specific
temperature
cooling at a very slow
and controlled rate
LAMINATED GLASS
TEMPERED GLASS
ANNEALED GLASS
RELIEVES INTERNAL STRESS
STRONGER DUE TO COMPRESSIVE STRESS
7. LAMINATED GLASS
• IN THE EVENT OF
BREAKING, IT IS HELD
IN PLACE BY AN
INTERLAYER, TYPICALLY
OF POLYVINYL BUTYRAL
(PVB)
• SOME OF THEM BLOCKS 99
PERCENT OF THE UV-LIGHT
TRANSMISSION AND REDUCE
SOUND
• THICKER