Laminated glass is a type of safety glass that holds together
when shattered. In the event of breaking, it is held in place by
an interlayer, typically of polyvinyl butyral (PVB), between its
two or more layers of glass. The interlayer keeps the layers of
glass bonded even when broken, and its high strength prevents
the glass from breaking up into large sharp pieces. This
produces a characteristic "spider web" cracking pattern when the
impact is not enough to completely pierce the glass. Laminated
glass is normally used when there is a possibility of human
impact or where the glass could fall if shattered. Skylight
glazing and automobile windshields typically use laminated
glass. In geographical areas requiring hurricane-resistant
construction, laminated glass is often used in exterior
storefronts, curtain walls and windows. The PVB interlayer also
gives the glass a much higher sound insulation rating, due to
the damping effect, and also blocks 99% of incoming UV light. 1.
Safety: Ordinary window glass is bri