We do something useful and pleasing to publish some information on the classification of the windows, which is important when the assessor must determine the type of glass damaged in the event of an accident and it complies with the policy conditions. What follows is taken from the "Glossary of Security" in the draft European standard prEN 50131-1.
1) Safety glass: laminated glass in which the choice of the number, the thickness, the assembly sequence of layers of glass sheets and PVB binders, is chosen so as to optimize the characteristics resistance to breakage. Usually requires several layers of glass of low thickness and thick sheets of PVB relatively high. The classification of proof glass is driven by the UNI 9186 which provides for three classes of resistance. Among the shatterproof laminated glass used prior to approval of UNI was the popular series "Visarm" (trade name of Saint Gobain) which is not a bulletproof glass, though the name can let you believe.
2) laminated glass: it is flat glass plates, overlay and made monolithic with the interposition of more or less thin sheets of plastic called a binder PVB (polyvinyl butyral). Cooking autoclave in the building is extremely strong and able to withstand attempts to break through or blows of a firearm. There is talk of laminated glass even though between the panes of glass are interspersed with layers of polycarbonate, which increases in size very sensitive shatterproof and bullet-resistant properties of such glasses.
3) accident prevention glass: laminated or tempered type of glass that did not feature shatterproof or bulletproof. E 'glass, which, in the use of a soft body (eg human body) is broken but does not produce chips that can cause injuries. It is used in glass doors and other security applications are not anti-crime (security), but security guards. (Safety).
4) bulletproof glass: laminated glass in which the choice of the number of the thickness of the assembly sequence of layers of glass sheets and PVB binders, is chosen so as to optimize the characteristics of resistance to bullets. Usually requires a few panes and thick sheets of PVB thickness relatively modest. The classification of proof glass is driven by the UNI 9187, which provides for five classes of resistance.
5) Tempered glass: glass obtained by a particular process of heating and cooling. E 'can only be used in safety applications, as it has no property against crime.
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