Laminated Glass is manufactured by permanently bonding two or more layers of glass with polyvinyl butyral (PVB) interlayer, under heat and pressure, to create a single construction. Its outlook is basically same as that of common annealed glass. Because the tenacity of PVB is very hight, the film will absorb enough shock energy rapidly and reduce it when interlayer glass is impacted by outside force, thus this kind of glass is hard to break. Meanwhile, thanks to film's bonding performance, the glass will not break off after its breaking, and still have the ability of shielding. From those we can see, laminated glass is the true secure glass, which can be widely applicable for window & door, curtain wall, daylighting roof, clearstory, shopwindow, counter, etc.