Laminated glass production is done by pressing more than one glass with hard elastic and tear resistant polyvinyl butyral (PVB) foils under heat and pressure. The glasses are put into an autoclave to turn into laminated glass for a certain period of time under 12 bar pressure and 150 ⁰C temperature.
They are units formed by bringing two or more glasses together and placing dry air or gases (argon etc.) that will provide insulation between them under ambient pressure. An interstitial spacer must be used to create an air or gas gap between the glass plates, and there must be a moisture absorbing material inside the interstitial spacer. The glass plates and the interstitial spacer must be combined using internal insulation material (butyl/polyisobutylene) and external insulation material must be applied to ensure the sealing of the insulating glass. The thickness of the glasses forming the insulating glass must be determined by taking into account loads such as wind, snow etc.