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How to prevent retort pouch breakage during sterilization?
During the high-temperature sterilization process of retort pouches, the residual gas inside the pouch expands, the volume of the contents increases, and the pressure inside the pouch rises. When the pressure inside the pouch exceeds the internal pressure the pouch can withstand, the pouch will burst. Shunxingyuan Packaging, a professional flexible packaging manufacturer, will tell you what measures can be taken to solve the problem of pouch bursting in high-temperature dry distillation pouches.
Retort pouch During high-temperature sterilization, the residual gas in the bag expands, the volume of the contents increases, and the pressure inside the bag rises. When the pressure inside the bag exceeds the internal pressure the bag can withstand, the bag will burst. Shunxingyuan Packaging, a professional flexible packaging manufacturer, will tell you what measures can be taken to solve the problem of retort pouch bursting.
To ensure sealing strength, the key is Retort pouch Do not contaminate the sealed part of the retort pouch during filling. If juice, water droplets, etc., adhere to the inside of the sealing part, the sealing part area cannot be sealed.
Retort pouch The flatness and consistency of the bag seal are also factors affecting the sealing quality. In order to maintain Retort pouch The packaging bag seal is flat and does not wrinkle after sealing. The following points should be noted: (1) The mouth of the retort pouch must be flat, and the lengths on both sides must be consistent; the mold on both sides of the sealing machine must be flat and parallel, and the fixture must be good; the blocky content should not be too large, the filling amount should not be too large, and the total thickness of the bag should not exceed the limit.
For retort pouches, the sealing temperature, pressure, and time depend on the material of the retort pouch, the melting temperature of the film, and the thickness of the sealing edge. Within a certain sealing time, if the temperature is too low, it will cause incomplete melting and difficult bonding, while if the temperature is too high, it will cause excessive melting of the film, changing its physical and chemical properties, and also leading to poor sealing. Similarly, Retort pouch Too low pressure also leads to insufficient connection of the melted film, while too high pressure may lead to extrusion and weak sealing of the melted film material. Sealing time determines production capacity. Under the premise of ensuring sealing quality, sealing time determines production capacity, and vice versa. Generally, the sealing temperature, pressure, and time should be tested.
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