Tempered glass burst in the absence of mechanical force, called blew.

Nickel sulfide’s expansion in the tempered glass interior is the main cause of tempered glass blew, this substance was impurities from the glass main raw material. Nickel sulfide particles in a crystal structure which the state transition from α to β state After some period, in this transformation process, the volume of nickel sulfide particles have a greater degree of expansion. This volume expansion process triggered tempered strong internal stress, resulting in glass blew. State regulations, blew glass was 3 ‰.

Impact glass burst there are some other factors:

1. The glass injury factors: the glass surface, the edge due to handling, installation, maintenance, careless, causing bombing mouth, surface corrosion, chipping etc. easy to damage caused by stress toughened glass blew.

2. The installation factors: During the installation process, the edge or corner of the gap is small or if the glass is installed directly in contact with the frame, in the sunlight, the expansion coefficient of the glass and the frame is not as easy to produce glass extrusion pressure , induced glass burst.

3. Glass processing factors: glass drilling or cutting angle is easy to burst.

4. Natural factors: strong typhoons and other storms cause wind pressure design failures, can cause glass burst.

Toughened glass is safety glass which belong to regulatory confirmation, widely used for mechanical strength and safety requirements of the higher places, such as glass doors, building walls, facades windows, interior partitions, furniture, away from heat and thermal shock more intense by location partition. Characteristics determine tempered glass blew can not be avoided, and can not predict the time and blew conditions, therefore, in order to prevent the glass blew harm, need to take some measures or methods in glass processing and installation process, to reduce glass blew bring losses.