Tea beverages are primarily packaged in PET plastic bottles. This beverage production line integrates rinsing, filling, and capping functions, making it ideal for producing mineral water, distilled water, and purified water. The entire machine is constructed of high-quality stainless steel, which is corrosion-resistant and easy to clean. Tea leaves are extracted at an appropriate temperature and centrifuged at high speed to produce a clear, transparent tea beverage. After ultra-high temperature sterilization, the beverage is filled and sealed on the beverage production line to create the assembled tea beverage. This beverage production line integrates rinsing, filling, and capping functions, making it ideal for producing mineral water, distilled water, and purified water. The entire machine is constructed of high-quality stainless steel, which is corrosion-resistant and easy to clean. Experts believe that PET bottles offer advantages over cans and glass bottles, such as light weight, low price, ease of drinking, and a transparent bottle surface, making the product easily visible and eye-catching. This beverage production line integrates rinsing, filling, and capping functions, making it ideal for producing mineral water, distilled water, and purified water. The entire machine is constructed of high-quality stainless steel, which is corrosion-resistant and easy to clean. PET bottles are also easy to process. Different products can be added with various masterbatches to give them unique colors, such as green. This helps to adjust consumer psychology, increase product stability, and prevent oxidation. However, the requirements for filling mineral water differ from those for filling cola and tea beverages. Cola is a carbonated beverage, requiring PET bottles to prevent CO2 leakage and O2 ingress. Ordinary PET bottles have some limitations in terms of acid, alkali, and high-temperature resistance. At temperatures above 60°C, the neck shrinks and softens, reducing volume and distorting shape. High-temperature PET bottles, developed in the early 1990s, increased their temperature resistance to around 95°C, enabling hot filling of tea beverages at temperatures between 85°C and 90°C. Many domestic beverage manufacturers, such as Master Kong, use this technology and equipment.
As packaging containers for tea beverages, PET bottles must address three key technologies to prevent microbial spoilage. To prevent spoilage, semi-aseptic packaging is essential. After ultra-high-temperature sterilization, the tea beverage is hot-filled and sealed in a cleanroom, where it cools for a period of time. Tea polyphenols inhibit microbial growth. This prevents the tea from becoming turbid. Tea turbidity is a major issue that needs to be addressed in the production of black tea beverages. Solutions should be addressed from various perspectives, including water quality, tea raw materials, extraction processes, and enzyme application. Aseptic packaging technology was a major technological innovation in tea beverage production in 1990. Semi-aseptic filling technology incorporates tea polyphenols, which have antimicrobial properties, while tea beverages are nutritionally deficient and therefore difficult to meet microbial nutritional requirements. Therefore, hot filling is very difficult for nutrient-rich milk teas, blended teas with low tea polyphenol content, and barley teas that contain no tea polyphenols. For non-carbonated beverages, the traditional production process involves placing the preheated or cooled product into bottles (cans), sealing them, and then pasteurizing or high-temperature sterilizing them according to a specific sterilization formula. The product is then cooled and dried to produce the finished product. The product is first sterilized or pasteurized at high temperature, then filled at 80°C to 95°C. The temperature of the product after sealing sterilizes the inner wall and cap. In 1987, Japan’s hot-filled beverage production exceeded that of cold-filled beverages.
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