The using temperature of glass water bottle. Tell you how to distinguish the heat resistant glass water bottle.
The glass water bottle can be divided into high temperature resistant and non-high temperature resistant materials. The use temperature of the glass water bottle that is not resistant to high temperature is generally "- 5 to 70 ℃. If the glass water bottle is made of high borosilicate material, its service temperature can be as high as 400-500 ℃, and it can withstand the instantaneous temperature difference of" - 30-160 ℃.
The using temperature of ordinary glass water bottle.
Ordinary glass is a poor conductor of heat. When a part of the inner wall of the glass is suddenly heated (or cooled), the inner layer of the glass water bottle expands obviously when heated, but the outer layer is not heated enough, so the temperature difference between the parts of the glass water bottle is large. Because of the expansion and contraction of the object, the thermal expansion of each part of the glass water bottle is uneven. If the difference is too large, the glass water bottle may be broken.
At the same time, glass is a very rigid material, and its heat transfer speed is slow. The thicker the glass is, the easier it will burst when the temperature rises fast due to the influence of temperature difference. That is to say, the temperature difference between the boiling water and the glass water bottle is too large to cause the glass water bottle to burst. Therefore, the using temperature of thicker glass water bottle is generally "- 5 to 70 ℃", or add some cold water and hot water before pouring boiling water. After the glass water bottle is warm, pour out the water and add boiling water.
The using temperature of high temperature resistant glass water bottle.
The biggest characteristic of high borosilicate glass is that it has a very low coefficient of thermal expansion, which is about one third of that of ordinary glass, that is, it is not sensitive to temperature. It has no common thermal expansion and cold contraction of ordinary objects, so it has high temperature resistance and high thermal stability. It can be used to hold hot water.