Why Do Your Glass Jars Bottles Crack When Sterilize Them In A High-temperature Sterilization Pot?
In the process of daily business contacts. There are often new customers who ask whether your glass bottle and jar high-temperature resistance. Because most of them are new food or beverage companies. Filling production is inexperienced. They always water-shower the bottles directly after the sterilization. So often resulting in broken glass bottles. In their perception, glass bottles are not heat-resistant. But this is a false perception.
In the usual sense, glass bottles are resistant to high temperatures. Glass bottles are melted at more than 1,000 degrees, then gradually cooled through molding, annealing, and other processes. Glass bottles need 500-600 degrees to soften. That is to say, before 500 degrees, the glass bottle can withstand. Therefore, the glass is not afraid of high temperatures, but afraid of rapid cold or hot. What we usually call the temperature difference, in professional terms, is called thermal vibration.
Glass bottles are blown from the use of open and closed mold. The body bottle, the bottom of the bottle, and open and closed mold structure parts, are more concentrated stress places. In the process of rapid cold and heat, these places of molecular activity are unusually intense, beyond the stress tolerance range, in the physical manifestation of the rupture.
How To Sterilize Glass Bottles Without Broken
Through the above analysis, we can draw the following conclusions.
The glass has high temperature resistance. But rapid cold and heat can easily lead to glass jar containers being broken. To ensure that the vast majority of users, manufacturing set the temperature difference is generally 42 degrees. That is the thermal vibration of ≤ 42 degrees Celsius. So the sterilization process after filling, to minimize the breakage of bottles, can not be set in the sterilization process is completed immediately after the completion of the water showers to cool. But rather in the pressure relief and cooled down for a period of time, and then carry out the water showers to cool down the temperature. The water showers before the difference between the meter display temperature and water temperature is not more than 42 degrees. Then the glass bottle will not be broken.
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