In the PET bottle hot filling production, the packaging materials that are in direct contact with the material are mainly PET bottles and bottle caps. PET bottles have a small number of colonies when they are freshly blown, but because the blown empty bottles are electrostatically charged, they easily absorb dust from the air, which is a good carrier for microorganisms. Empty bottles will be contaminated by microorganisms during storage, and the degree of contamination is related to the packaging of PET and the environment of the bottles. PET bottles and bottle caps used for ESL hot filling need to choose reasonable packaging methods and strictly control the storage and transportation conditions of packaging materials. At the same time, they must be disinfected before production and use. In the process design, the choice of the disinfectant type isolator, the disinfectant use process conditions, and the disinfecting method should be determined according to the initial microbial contamination level of the packaging material.
In the ESL hot-filling production line of PET bottles, the disinfecting methods of empty bottles mainly include disinfectant filling and jetting. The main methods of disinfection of empty lids are continuous jetting and soaking. In the design of the production line, it is necessary to select a reasonable packaging material according to the sterilization strength of the selected disinfectant, the corrosiveness of the disinfectant and the irritation to the personnel, the operating speed and stability requirements of the production line isolator, and the quality control level of the production enterprise. Disinfection method.
Commonly used disinfectants for the sterilization of packaging materials used in PET bottle ESL hot filling production are hypochlorous acid, chlorine dioxide, peracetic acid and complex disinfectants. In general, in the low-speed production line, the use of infusion sterilization method can maintain a longer duration of the disinfectant, and disinfectants with a weaker sterilizing ability can be selected. In the middle and high-speed production lines, in order to ensure the reliability of the equipment operation, the flushing method of the disinfectant is generally used. At the same time, in order to reduce the investment cost of the equipment, the process requires a shorter injection time and a shorter acting time of the disinfectant. Therefore, when using disinfectants, disinfectants with strong bactericidal capacity should be used.
Regarding the selection of disinfectant species, in addition to focusing on the broad-spectrum bactericidal properties and bactericidal strength of disinfectants for microorganisms, the corrosion of disinfectants on equipment, the damage of disinfectants to operators, and the residue of disinfectants in packaging materials are the focus. Elements to consider. For example, the commonly used isolator chlorine dioxide, which has a strong irritant, after contact with cough, sneezing, shortness of breath, chest tightness and runny nose, tearing and other irritation, inhalation of high concentrations can also occur pulmonary edema.
In the ESL hot-filling production line of PET bottles, the disinfecting methods of empty bottles mainly include disinfectant filling and jetting. The main methods of disinfection of empty lids are continuous jetting and soaking. In the design of the production line, it is necessary to select a reasonable packaging material according to the sterilization strength of the selected disinfectant, the corrosiveness of the disinfectant and the irritation to the personnel, the operating speed and stability requirements of the production line isolator, and the quality control level of the production enterprise. Disinfection method.
Commonly used disinfectants for the sterilization of packaging materials used in PET bottle ESL hot filling production are hypochlorous acid, chlorine dioxide, peracetic acid and complex disinfectants. In general, in the low-speed production line, the use of infusion sterilization method can maintain a longer duration of the disinfectant, and disinfectants with a weaker sterilizing ability can be selected. In the middle and high-speed production lines, in order to ensure the reliability of the equipment operation, the flushing method of the disinfectant is generally used. At the same time, in order to reduce the investment cost of the equipment, the process requires a shorter injection time and a shorter acting time of the disinfectant. Therefore, when using disinfectants, disinfectants with strong bactericidal capacity should be used.
Regarding the selection of disinfectant species, in addition to focusing on the broad-spectrum bactericidal properties and bactericidal strength of disinfectants for microorganisms, the corrosion of disinfectants on equipment, the damage of disinfectants to operators, and the residue of disinfectants in packaging materials are the focus. Elements to consider. For example, the commonly used isolator chlorine dioxide, which has a strong irritant, after contact with cough, sneezing, shortness of breath, chest tightness and runny nose, tearing and other irritation, inhalation of high concentrations can also occur pulmonary edema.
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