1. Tempered glass is divided into flat tempered glass and curved tempered glass according to shape.
Generally flat tempered glass thickness of 11,12,15,19 mm, and other 12 kinds; curved tempered glass thickness of 11,15,19 mm and other eight, the specific thickness of the processed or depends on the manufacturers of equipment and technology. However, curved (ie, curved tempered) toughened glass has a maximum arc limit for each thickness. R R is the radius.
2 tempered glass according to their appearance is divided into flat steel and curved steel.
3 tempered glass is divided according to its smoothness: excellent products, qualified products. Top grade tempered glass for automotive windshield; qualified products for architectural decoration.
⒈ physical tempered glass, also known as hardened tempered glass. It is the ordinary flat glass in the heating furnace heated to near the glass softening temperature (600 ℃), through its own deformation to eliminate internal stress, and then remove the glass furnace, and then the long nozzle high pressure cold air blown glass Both sides, so that it quickly and evenly cooled to room temperature, can be made of tempered glass. This glass is in the internal tension, the external pressure of the state of stress, once the local damage occurs, there will be stress release, the glass was broken into numerous small pieces, these small pieces of sharp edges and corners are not easy to hurt.
⒉ chemical tempered glass by changing the chemical composition of the glass surface to improve the strength of the glass, the general application of ion exchange method is tempered. The method comprises the following steps: immersing the silicate glass containing alkali metal ions in lithium (Li +) salt in molten state to exchange Na + or K + ions on the glass surface with Li + ions to form Li + ion exchange layer on the surface; The expansion coefficient is smaller than that of Na + and K + ions, resulting in smaller shrinkage of the outer layer and larger shrinkage of the inner layer during cooling. When cooling to normal temperature, the glass is also in a state of being tensioned in the inner layer and compressed in the outer layer, Similar to physical toughened glass.