How long is the glass life?
[China Glass Net] The chemical composition of glass is very stable. In the natural state, the glass will not be affected by the sunlight and rain, and the performance will be attenuated; ordinary acid and alkali can not cause damage to the glass. Under normal circumstances, there are two situations that affect the life of the glass, one is wet and the other is high temperature. Ordinary glass life Persistently moist air can cause mildew in the glass, but at room temperature, the mildew of the glass is very slow. It usually takes several months, and in normal use, there is very little humid air that lasts for several months. Because the glass is exposed to the air, it will not be mildewed. Generally, the mildew of the glass occurs during the overlapping storage of the glass, and the glass is prone to mildew in the wet warehouse or in the open air. In general, raw glass without tempering is more susceptible to mildew than tempered glass. Regardless of the thermal cracking factor, the temperature at 300 °C has no effect on glass life and chemical stability. However, above 300 °C, as the temperature increases, the physicochemical properties of the glass change with increasing temperature. Physically, the general glass begins to soften at around 600 degrees. Chemically speaking, an increase in temperature causes crystallization in the interior of the glass, causing the glass to gradually change from transparent to fuzzy. At 700 ° C, the process of devitrification of the glass crystallization is a few days, and in the case of 300 ° C you need months or even years. In the case of normal temperature, the crystallization of the glass may become ambiguous for tens of thousands of years, because it may not be considered. Tempered glass life Physical tempering is to heat and quench the glass, changing the structure between the molecules and molecules inside the boil; chemical tempering is to ion exchange the molecular structure of the glass surface at high temperature; both methods change the glass for a long time. The microstructure of the material. Therefore, unless there is high temperature and strong chemical action, the characteristics of the tempering will not attenuate or change with time under normal use. Insulating glass life The insulating glass is a combination of a glass substrate, a spacer frame (aluminum strip), a desiccant (molecular sieve), a sealing material (butyl rubber, polysulfide rubber or structural adhesive). In the construction of insulating glass, glass and aluminum frames are generally very stable, and the life of the insulating glass depends on the life of the molecular sieve and the sealing material. In the construction of an insulating glass system, the glass is very stable. Earlier, China's glass enterprises gave the concept of a 10-year warranty period with reference to the US standard; in the national standard for insulating glass, the concept of "explosive life of insulating glass should be greater than 15 years" was proposed. For insulating glass that has been installed on the wall, a simple measure is to measure the humidity of the dew point or spacer layer. Linen Cotton Fabric,Sailing Vessel Fabri,Wash Painting Pattern Fabric,Dark Blue Fabric Shaoxing City Jiaren Textile Co., ltd. , https://www.jiarentextile.com