What are the sterilization methods for food packaging bags?
Packaging bags used for direct packaging of food are all called food packaging bags. Since the food is to be packaged directly, the packaging bag is required to be non-toxic, sterile, and not contaminated before it can be packaged. Therefore, many food manufacturers often use some special methods to sterilize the packaging bags after packaging the food. Only in this way can it be ensured that the food will not deteriorate quickly and its shelf life can be ensured. Let’s introduce several common sterilization methods for food packaging bags.
Pasteurization, also known as low-temperature sterilization, cold sterilization, is a sterilization method that uses a lower temperature to kill germs and keep the flavor of nutrients in items unchanged. It is often used broadly to define the need to kill A heat treatment method for pathogenic bacteria. Using a lower temperature (generally 60-82°C) and heating the food within a specified time to achieve the purpose of killing microbial nutrients is a method that can achieve the purpose of disinfection without compromising the quality of the food. It was invented by the French microbiologist Louis Pasteur and named after it. The degree of pasteurization heat treatment is relatively low. Generally, heating is performed at a temperature lower than the boiling point of water, and the heating medium is hot water.
2. Boiled sterilization
Boiling at 100°C for 5 minutes can kill all bacterial propagules. Generally, it is better to boil for 10 minutes for disinfection. This sterilization method can not only be used to sterilize packaging bags but also commonly used to sterilize general surgical instruments, hoses and syringes, drinking water and eating utensils. Boiled sterilization is mainly carried out in a boiling pot.
3. Retort sterilization
High-temperature steaming, also known as high-temperature steam sterilization, refers to the moist and heat treatment process that uses high-temperature steam to kill all microorganisms on the media. Steam has the advantages of high temperature and strong penetration under high pressure. It can kill all microorganisms when maintained at 220kpa and 134°C for 45 minutes. It is a simple, reliable, economical and rapid sterilization method.
4. Radiation sterilization
Radiation sterilization is an effective method of using electromagnetic waves generated by electromagnetic radiation to kill microorganisms on most materials. Electromagnetic waves used for sterilization include microwaves, ultraviolet (UV), X-rays, and gamma rays. They can control the growth of microorganisms or kill microorganisms in a specific way.
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