The chemical composition of ordinary glass is Na2SiO3, CaSiO3, SiO2 or Na2O·CaO·6SiO2, etc.
The main component is silicate double salt, which is an amorphous solid with random structure. It is widely used in buildings to block wind and light, and belongs to a mixture.
There are also colored glass mixed with oxides or salts of certain metals to show color, and tempered glass obtained by physical or chemical methods.
Glass bottles and cans should have certain performance and meet certain quality standards.
①Glass quality: pure and uniform, without defects such as sand, streaks, and bubbles. Colorless glass has high transparency; the color of colored glass is uniform and stable, and can absorb light energy of a certain wavelength.
②Physical and chemical properties: It has a certain degree of chemical stability and does not interact with the contents. It has a certain degree of shock resistance and mechanical strength, and can withstand heating and cooling processes such as washing and sterilization, as well as withstanding filling, storage and transportation, and can remain undamaged when encountering general internal and external stress, vibration, and impact.
③Forming quality: maintain a certain volume, weight and shape, uniform wall thickness, smooth and flat mouth to ensure convenient filling and good sealing. There are no shortcomings such as distortion, uneven surface, unevenness and cracks.
Post time: Jan-12-2022