There are two kinds of glass materials: high temperature resistance and low temperature resistance. Non-high temperature resistant glass temperature is generally “-5 to 70 degrees Celsius”, if it is made of high borosilicate material, then its use temperature can be 400 to 500 degrees higher, and can withstand the instant “-30 to 160 degrees Celsius” temperature difference.
The difference between a glass and a heat-resistant material is very simple: A heat-resistant glass with hot water on its surface is not hot, and a non-heat-resistant glass with hot water on its surface is hot. After distinguishing the service temperature of these two kinds of glasses, let’s take a look at the characteristics of these two kinds of glasses.
The service temperature of a normal glass
Ordinary material glass is a poor conductor of heat, as part of the glass wall suddenly encounter heat (or cold), the inner layer of the cup is heated less obvious expansion but outer heat enough, resulting in the glass temperature difference between the parts is bigger, and due to the reason of heat bilges cold shrink of the object, which makes glass uneven heat expansion of the parts, the uneven, the difference is too big It may shatter the glass.
At the same time, glass is a very rigid material, the heat transfer speed is slow, the thicker the glass, due to the influence of temperature difference, the faster the temperature rises, the easier it is to crack. This means that the temperature difference between the boiling water and the glass is too large and the glass will burst. Therefore, the temperature of thick glasses is generally “-5 to 70 degrees Celsius”, or add a little cold water and then a little hot water before pouring boiling water. When the glass is warm, pour the water out and add boiling water again.
The service temperature of a high temperature glass
The greater 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. It is insensitive to temperature and has no common thermal expansion and contraction of general objects, so it has high temperature resistance and high thermal stability. It can be used to hold hot water.
However, Uplus reminds you, do not use the tempered glass on the market as a cup with no high temperature resistance. The use temperature of the tempered glass and ordinary glass is the same, generally below 70 degrees, and you need to be careful to use it.
You can rest assured to choose Uplus high boron glass glasses to provide security for your family.
It also supports processes such as thermal sublimation
Post time: Oct-21-2022
