Laminated Glass

The production process involves perfect cleaning of the glass panes in multi chamber glass washing and drying machine using filtered and De-ionized water and treatment chemicals. These panes are then mechanically transported to a clean and controlled atmosphere chamber, where the temperature and humidity are strictly   maintained as per standards since unprocessed PVB is extremely sensitive to moisture and temperature. PVB is then applied in this lay-up room and the sandwich of glass and PVB is passed through preheating chamber, pre nip rolls, secondary heating and final nip rolls to squeeze out air bubbles and provide primary bonding.

The sandwiches are then stacked in a high pressure autoclave where PVB is cured under high pressure and temperature as per heat pressure cycle chart. The entire processing is done with computerized state of the art machine and technical assistance of M/s. Scholz of Germany and DuPont of USA. All basic products, heat strengthened glass and toughened glass can be laminated.

• In sloped glazing, the added weight of laminated glass must be taken into consideration when determining load limits and installation techniques.
• The edges of a laminated lite must not be exposed to any prolonged contact with moisture.
• Consideration must be given to the use of weep holes or other alternate glazing procedures to assure a dry framing cavity.
• Edge delamination is possible in silicone structural glazing applications if precautions are not taken. U-values may vary by a small amount.
• Laminated glass is made by joining two or more sheets of glass with a plastic medium, mostly PVB, between the sheets. PVB itself adheres well to glass.
• Laminating can also be done with certain resins. Some suppliers use PVC instead of PVB or use cheap resins, which are difficult to make out at the time of supply but these materials will most certainly discolor and delaminate in a short period and such glasses will have to be changed.