Laminated Glass
Laminated glass is a sandwich of two or more sheets of glass with a plastic interlayer usually polyvinyl (PVB) interlayer in between. The glass panes can be basic float glass, tempered or heat strengthened.
During lamination process chemical bonds are formed between glass and PVB interlayer’s under temperature and pressure conditions. Mechanical and chemical bonds are formed between PVB and Glass.
Hence it is combination of mechanical and chemical bonds that provide PVB laminated its properties.
Breakage Pattern of Laminated glass

PVB- Bonding Mechanism

Clean glass surface + correct moisture content of the film = good adhesion


Adhesion to glass is determined by the formation of hydrogen bonding bridge between the water compatible group of the glass surface and those of the polymer.


Ordinary glass windows are brittle and break into long sharp pieces, causing serious and sometimes fatal injuries. An important feature of laminated glass is its performance under impact. That is, the interlayers is laminated glass have the capacity to absorb the energy of impact and resist penetration.

Safety hazards caused due to breakages are minimized with the use of laminated glass. Although the glass may break, the glass fragments will adhere to the PVB interlayer, minimizing the risk of injury and property damage.


The rise in urban crime and terrorism has created a need for security & safety. Laminated glass fulfils this need. When multiple or thick interlayers are used, laminated glass can withstand higher laves of impacts. Laminated security glass can replace traditional bars to create a more humane environment.

Ionoplast Laminated Glass (Sentry Glass –Dupont) is further more stronger and much Stiffer. Ionoplast interlayer are lighter and can withstand  great load and higher threat levels.

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