Overview of Laminated Glass
Laminated glass, regard as “Safety glass”, consist of two or more panes of glass with one or more layers of polyvinyl butyral (PVB) sandwiched between them and treated. The glass panes can be basic float glass or tempered or heat strengthened panel. If the glass is broken fragments tend to adhere to the PVB interlayer thereby reducing the risk of injury from falling glass and helping to resist further impact or weather damage. PVB membrane has good tenacity performance and when the laminated glass breaks due to violent force, the PVB will absorb large amount of impact energy and disperse it rapidly. Therefore, it hard to break the laminated glass and the shape of the glass may be maintained even if being broken. Furthermore, personnel inside and outside the buildings will not be hurt by the glass fragment.
Laminated Glass Process:
PVB laminated glass is manufactured by combining two or more annealed or heat treated glass sheets bonded with one or more of PVB interlayers and subjected to heat and pressure, in order to ensure perfect adhesion between the constituent elements.
The lamination process comprises the following steps:
- Glass pre-processing
Resin laminated glass is manufactured by pouring liquid resin into the cavity between two sheets of glass which are held together until the resin cures. Regardless, Resin Laminated glass is not considered as Safety Glass.
Features of Laminated Glass:
WEATHER AND DISASTER CONTROL
DESIGN VERSATILITY AND INSTALLATION EASE
LOW VISUAL DISTORTION
Properties of Laminated Glass:
Applications of Laminated Glass:
Laminated glass is widely used in manufacturing and automotive industries and in a variety of commercial and residential applications because of its safety, security, sound abatement and solar control characteristics.
In glass skylights, sunspaces, sloped glazing installations and curtain walls, there is always the possibility of glass breakage. This is why many building codes worldwide use laminated glass for overhead glazing.
It is used in schools, hospitals, hotels and office buildings, and wherever there are sound control requirements.
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