Production technology of glass bottle


glass bottle

The main characteristics of glass bottle:

non-toxic, tasteless; transparent, beautiful, good barrier, airtight, rich and common raw materials, low price, and can be used repeatedly. It has the advantages of heat resistance, pressure resistance and cleaning resistance. It can be sterilized at high temperature and stored at low temperature.

Glass bottle production process:

  1. Batching: according to the designed material list, all kinds of raw materials are weighed and mixed evenly in a mixer.
  2. Melting, the prepared raw materials are heated at high temperature to form a uniform bubble free liquid glass.
  3. Forming is to transform molten glass into solid products with fixed shape.
  4. After annealing, the glass undergoes intense temperature change and shape change during the forming process. This change leaves thermal stress in the glass, which will reduce the strength and thermal stability of the glass products.

Note: if it is cooled directly, it is likely to break during cooling or later storage, transportation and use. In order to eliminate the phenomenon of cold explosion, glass products must be annealed after forming. Annealing is to keep the temperature in a certain range or slowly cool down for a period of time to eliminate or reduce the thermal stress in the glass to the allowable value.