Chemical stability of glass bottles

Chemical stability of glass bottles

Glass products are attacked by water, acids, bases, salts, gases and other chemicals during use. The resistance of glass products to these attacks is called chemical stability.

The chemical stability of glass bottle products is mainly reflected in the glass bottle being eroded by water and atmosphere. In the production of glassware, some small factories will sometimes reduce the content of Na2O in the chemical composition of glass bottles or reduce the content of SiO2 to reduce the melting temperature of glass bottles, so that the chemical stability of glass bottles can be reduced.

Chemically unstable glass bottle products stored in a humid environment for long periods of time, resulting in surface hairiness and loss of the glass bottle's luster and transparency. This phenomenon is often referred to in factories as "backalkali". In other words, glass bottles become less chemically stable to water.

Enough attention should be paid to it. Do not excessively seek to reduce the melting temperature and increase the Na2O content. Some flux should be introduced properly, or chemical composition should be adjusted to reduce the melting temperature, otherwise it will bring serious quality problems to the product. Sometimes due to poor chemical stability, it seems to end the "backalkali", but when exported to some countries with higher air humidity, the "backalkali" will lead to great economic losses. Therefore, the chemical stability of glass bottles in production has a full understanding.