Sterilization of materials is the most critical step in the production process of glass bottle capping machines. Due to the heat resistance of the material, it can only be sterilized by chemical reagents. To ensure that the glass bottles and lids are effectively sterilized, and the chemical reagents are not allowed to affect the materials, the following measures are taken for aseptic filling: The original number of colonies of the bottle is not more than 5cf/bottle; the delivery bottle is made of sterile air, and there is an air conveyor belt; the inside of the bottle is sterilized by peracetic acid disinfectant (PAA), which can achieve high bactericidal effect (up to 7log) At the same time, the external disinfection of the glass bottle is disinfected; the disinfectant has an automatic recovery and concentration measurement system to ensure the concentration of the disinfectant is stable; the residual disinfectant in the bottle is rinsed with sterile water, and then dried with sterile air. Ensure that the residual disinfectant does not affect the material; the bottle cap is generally sterilized by disinfectant, and the sterilization effect can be ensured by controlling the soaking time.
Since the bottle will not shrink after cold filling, there will be some air between the material and the cap, and the oxygen will slowly decay during the storage process, which will cause the beverage to deteriorate. Therefore, the all-glass bottle capping machine will add a nitrogen (or other inert gas) replacement system to blow off the top air to ensure that the material is not oxidized.
For the maintenance of aseptic space environment, the cleaning room isolation measures are generally adopted. The main capping machine is designed as a D100 air purifying room, and there is a 10,000-class purifying room outside (some aseptic filling equipment is not required). The cleaning system in the purifying room ensures the cleanliness of the air in the filling environment so that the materials will not be Secondary contamination by microorganisms suspended in the air.
For neutral beverages, it cannot be produced by hot filling process. Because of the bottle sterilization method, the high acid beverage can inhibit the growth of microorganisms, while the neutral beverage can not guarantee the safety of the products. . If a neutral tea beverage is produced by a hot filling process, a preservative must be added. For the all-glass bottle capping machine, the biggest difference is that the beverage is heated for different time because it is in sterile condition. It is well known that the longer the heat treatment time, the greater the effect on the quality and mouthfeel of the beverage. The all-glass bottle capping machine adopts UHT ultra-high temperature instantaneous sterilization, the heat treatment time of the material is not more than 30 seconds, and the sterilization effect can be completely ensured under the high temperature condition, and the sterilization method adopted by the hot filling makes the material be in a high temperature state for a long time. Under, seriously affect the product taste, color and heat-sensitive nutrients (such as vitamins).
In addition, from the point of view of the configuration of the production line, when the capping machine has a faulty shutdown elbow, the material processed by the hot filling method has a partial reflow which will prolong the heating time, which will seriously affect the quality of the whole batch of products, and the full glass bottle capping This phenomenon does not occur in the machine. The material has been cooled to room temperature after being instantaneously sterilized, and it will not affect its quality when placed in a sterile tank.
Comparison of the bottles used. As can be seen from the above filling process, the requirements of the two filling methods are different. The hot filling process requires that the bottle can withstand the high temperature of 85 ° C ~ 92 ° C and does not change, which requires increasing the crystallinity of the material, while limiting the generation of induced stress during blowing. The bottle used has the following characteristics: the wall thickness of the bottle, the clear wall ribs to prevent heat shrinkage; the requirement of a crystal bottle mouth, etc., which greatly limits the degree of freedom of the bottle design. The glass bottle capper can use a lightweight bottle (up to 60 ° C) and a standard cover, which greatly reduces the cost of the bottle and lid, and is also free to choose the bottle type. Under the filling, the process adaptability, can produce a wide range of products, including neutral tea drinks, milk drinks and other various beverages, only need to adjust the pre-processing equipment to change the product type.
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