Safety glass is a general designation of a kind of glass, requirement classics acuteness vibration or bump do not break, although break not easy also hurtful, and tempered glass is one of them. Under the classification of safety glass, there are many kinds of glass!
1. Tempered glass
Tempered glass is made by quenching the glass with high-speed air and other cooling media when the glass is heated uniformly to the softening temperature. The uniform compressive stress on the glass surface can improve the mechanical strength and thermal shock resistance of the glass. Using air as a cooling medium when tempered; Using oil and other liquids as a cooling medium when liquid steel; Use molten salt as a cooling medium when salt bath steel. According to the degree of hardening and the shape of the products, they can be divided into full steel, regional steel, semi-steel, plane steel and bending steel varieties. The flexural strength of tempered glass is 3 ~ 5 times larger than untreated glass, up to 150 ~ 250 mph, thermal stability increased 3 ~ 4 times, can withstand the temperature difference of 200 ~ 250℃, when broken, the formation of no sharp edges and edges of particles, very little harm to the human body, is the most widely used safety glass.
2. Laminated glass
Sandwich glass is in two or more pieces of glass sandwiched with transparent polyvinyl butyraldehyde film or other gluing materials, through heating, pressure gluing and composite glass products. When affected by the impact, because the middle layer has elasticity, strong bonding force, can improve the impact strength, when broken its debris does not fall, do not splash, can effectively prevent or reduce the damage to the human body. In addition, special laminated glass can be made of heat-absorbing glass, heat-reflecting glass, color glass, and conductive film glass.
3. Bulletproof glass
Bulletproof glass can be said to be the highest level of safety glass at present. It is made of toughened glass, chemically reinforced glass, wire (mesh) glass and high-strength organic materials (such as directional plexiglass, polycarbonate, etc.) and composite glass made of sandwich technology. According to different requirements, different materials can be selected to form different composite structures to achieve the performance of resisting bullets and preventing theft within a certain distance.