Tempered glass is produced by heating annealed glass in a furnace to 620°C. Progressing from the furnace,
the glass is rapidly cooled with jets of cold air, inducing compressive stresses to the surface while the center remains tensile.
4-5 times stronger than annealed glass of the same thickness.
Stronger resistance to thermal breakage than annealed or heat strengthened glass.
If breakage occurs the glass breaks up into small, cubical fragments, which are not threatening to humans.
is formed as sandwich of 2 sheets or more Float Glass
, between which is bonded together with a tough and thermoplastic polyvinyl butyral (PVB) interlayer under heat and preesure and pull out the air，and then put it into the high pressure steam kettle taking advantage of high temperature and high pressure to melt remaining small amount of air into the coating