The packaging environment (ie packaging line) includes the equipment and the working environment. Aseptic packaging equipment is the general name of a unit, which is mainly composed of two parts: sterile cooling and aseptic filling equipment. In the unit must be equipped with a suitable material delivery system, to have a fully reliable automatic control system, to set up an automatic cleaning system, to use special packaging materials.
The work requires that the supply of water, electricity, steam, and compressed air be completely reliable. The system through which the food passes must be sterile, and the space environment that the food fills into the packaging container must be sterile.
In addition, aseptic packaging generally requires large-scale equipment, especially food sterilizers and aseptic packaging machines. The equipment investment is large and the cost is high. The hygiene requirements for operation and management are strict and difficult, and once the pollution will be scrapped in batches. , resulting in waste, great losses, and all aspects from beginning to end must be re-sterilized; equipment and product specificity, not suitable for the production of small quantities and varieties of products, poor general use; aseptic packaging is difficult to apply in the high Viscosity foods and solid foods are generally used only for foods with good fluidity.
Sterile packaging requires the prevention of intrusion of external microbes from the entire process of sterilizing the food to aseptic filling and sealing of the packaging. The connection points where the food flows through must ensure a reliable seal and prevent the food from being contaminated by microorganisms from the outside of the system. In the process of aseptic packaging, adequate attention should be paid to the secondary pollution of microorganisms, and the time for direct contact between the sterilized food and packaging containers and the air should be minimized. Prior to food packaging, the packaging machinery and the operating environment should be handled aseptically.
The packaging machinery can be washed with hot alkaline water, neutralized with dilute hydrochloric acid, rinsed with hot water, and then sterilized with high temperature steam. The operating environment can be aseptically treated by chemical sterilization and physical sterilization. The general sterile room is equipped with an air filter device and an ultraviolet ray sterilizer to maintain the aseptic condition of the sterile room. Ultraviolet rays can be periodically irradiated to kill microorganisms that are free from the air. Ensure that the cleanliness, temperature, and humidity of the sterile room are all in compliance with the prescribed standards (temperature is generally controlled at about 18 degrees Celsius, and the humidity is generally about 55%).
Sterilization of the operating environment prevents bacteria and other contaminants from entering the operating environment. Sterilization is mainly achieved through filtration and dust removal methods. Generally, the air in the sterile operation space needs to be sterilized, second-stage filtered, and heated and sterilized to produce sterile overpressure air, and its overpressure state ensures that environmental bacteria can infiltrate the sterile working area. The sterilization of packaging machinery is usually done with ethylene oxide. Since ethylene oxide gas has a penetrating effect on vinyl plastics, many parts of the packaging machine that come in contact with food are often made of vinyl plastic. Therefore, when using a ring When oxyethylene is sterilized, it should be heated and decompressed to accelerate the evolution of its volatiles.
During the transportation process, the tightness of the takeover place, the valve, the heat exchanger, the homogenizer, the pump, etc. shall be maintained, and the positive pressure state shall be maintained inside the system so as to ensure that the outside air does not enter. At the same time, the transmission line is required to be as simple as possible to facilitate cleaning. Sterile packaging system equipment sterilization process is generally implemented using CIP in-situ cleaning system, according to the type of product can be set according to sterilization requirements of the cleaning process. An inspection device shall be set up in an aseptic operating environment to monitor the amount of microorganisms in the environment and to ensure the sterility of the packaged products.
Ensure aseptic sealing of packaging: Packaging sealing is the last link for aseptic packaging, and it is also a key link, which directly affects the packaging quality and storage period of the product. The requirements are on the one hand to prevent the intrusion of microorganisms and gases or water vapor, on the other hand it is not to allow the product's own odor and stock solution to overflow. Most aseptic packaging seals are heat-sealed, ultrasonic-sealed, rubber-sealed, or gas-sealed, and some are folded, snapped, and sealed.
Sealing should pay attention to the pressure should be evenly distributed in the sealing surface; sealing process conditions such as sealing temperature, time, pressure must have a safety limit, and can control; sealing surface should avoid contamination of products or other dirt; sealing position must be accurate, especially In the case of thermoforming/filling/sealing on the same machine, deviations in the sealing position should be prevented.
The work requires that the supply of water, electricity, steam, and compressed air be completely reliable. The system through which the food passes must be sterile, and the space environment that the food fills into the packaging container must be sterile.
In addition, aseptic packaging generally requires large-scale equipment, especially food sterilizers and aseptic packaging machines. The equipment investment is large and the cost is high. The hygiene requirements for operation and management are strict and difficult, and once the pollution will be scrapped in batches. , resulting in waste, great losses, and all aspects from beginning to end must be re-sterilized; equipment and product specificity, not suitable for the production of small quantities and varieties of products, poor general use; aseptic packaging is difficult to apply in the high Viscosity foods and solid foods are generally used only for foods with good fluidity.
Sterile packaging requires the prevention of intrusion of external microbes from the entire process of sterilizing the food to aseptic filling and sealing of the packaging. The connection points where the food flows through must ensure a reliable seal and prevent the food from being contaminated by microorganisms from the outside of the system. In the process of aseptic packaging, adequate attention should be paid to the secondary pollution of microorganisms, and the time for direct contact between the sterilized food and packaging containers and the air should be minimized. Prior to food packaging, the packaging machinery and the operating environment should be handled aseptically.
The packaging machinery can be washed with hot alkaline water, neutralized with dilute hydrochloric acid, rinsed with hot water, and then sterilized with high temperature steam. The operating environment can be aseptically treated by chemical sterilization and physical sterilization. The general sterile room is equipped with an air filter device and an ultraviolet ray sterilizer to maintain the aseptic condition of the sterile room. Ultraviolet rays can be periodically irradiated to kill microorganisms that are free from the air. Ensure that the cleanliness, temperature, and humidity of the sterile room are all in compliance with the prescribed standards (temperature is generally controlled at about 18 degrees Celsius, and the humidity is generally about 55%).
Sterilization of the operating environment prevents bacteria and other contaminants from entering the operating environment. Sterilization is mainly achieved through filtration and dust removal methods. Generally, the air in the sterile operation space needs to be sterilized, second-stage filtered, and heated and sterilized to produce sterile overpressure air, and its overpressure state ensures that environmental bacteria can infiltrate the sterile working area. The sterilization of packaging machinery is usually done with ethylene oxide. Since ethylene oxide gas has a penetrating effect on vinyl plastics, many parts of the packaging machine that come in contact with food are often made of vinyl plastic. Therefore, when using a ring When oxyethylene is sterilized, it should be heated and decompressed to accelerate the evolution of its volatiles.
During the transportation process, the tightness of the takeover place, the valve, the heat exchanger, the homogenizer, the pump, etc. shall be maintained, and the positive pressure state shall be maintained inside the system so as to ensure that the outside air does not enter. At the same time, the transmission line is required to be as simple as possible to facilitate cleaning. Sterile packaging system equipment sterilization process is generally implemented using CIP in-situ cleaning system, according to the type of product can be set according to sterilization requirements of the cleaning process. An inspection device shall be set up in an aseptic operating environment to monitor the amount of microorganisms in the environment and to ensure the sterility of the packaged products.
Ensure aseptic sealing of packaging: Packaging sealing is the last link for aseptic packaging, and it is also a key link, which directly affects the packaging quality and storage period of the product. The requirements are on the one hand to prevent the intrusion of microorganisms and gases or water vapor, on the other hand it is not to allow the product's own odor and stock solution to overflow. Most aseptic packaging seals are heat-sealed, ultrasonic-sealed, rubber-sealed, or gas-sealed, and some are folded, snapped, and sealed.
Sealing should pay attention to the pressure should be evenly distributed in the sealing surface; sealing process conditions such as sealing temperature, time, pressure must have a safety limit, and can control; sealing surface should avoid contamination of products or other dirt; sealing position must be accurate, especially In the case of thermoforming/filling/sealing on the same machine, deviations in the sealing position should be prevented.
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