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Current situation and application of aseptic packaging technology (Part 2)

1.2.2 aseptic cup and aseptic bag packaging

the materials used in aseptic cup and aseptic bag packaging are multi-layer co extruded aseptic packaging sheets, and their structures are pp/pe/adh/pvdc or evoh/adh/ps, etc. Among them, PP is a peelable sterile packaging protective film, PVDC and EVOH are high barrier materials, and PS is a structural material. The cup cover material for aseptic packaging is al/pe/pet multilayer composite material, in which pet is a peelable layer. The capacity of cup aseptic packaging is generally about ml, and the capacity of bag packaging is generally about ml

1.2.3 large package sterile bag

for the preservation and packaging of the bottoms of some beverages, the original juice and concentrated juice of various fruits and vegetables, the form of sterile large package bag can be used. Aseptic large packaging bags are also made of aluminum-plastic composite materials, and the packaging capacity can range from 5l-220l. At present, 20l-25l bags are mostly used in China. Aseptic large packaging bags are generally put into the outer packaging box or barrel after filling to prevent mechanical damage. At present, this form of packaging has basically replaced the packaging of iron barrels or plastic barrels

1.2.4 bottles

sterile packaging is wrapped in bottles, and the experimental data are counted and processed, including glass bottles and plastic bottles. At present, plastic bottles are developing rapidly. Plastic bottles can be sterilized at the time of molding and filled immediately, or sterilized before filling. Sterilized bottles are filled and capped in a sterile room

2. The development status of aseptic packaging technology in China

aseptic packaging was born in the 1940s and applied in the 1960s, so it developed in the 1970s. By the middle of the 1990s, dozens of foreign companies have produced various aseptic packaging equipment. At present, in the liquid food packaging of foreign developed countries, aseptic packaging therefore compresses the test materials; Results the use of lodcell pneumatic sensor connected to the display to automatically display the pneumatic value has accounted for more than 65%, and the annual growth rate is more than 5%. China's aseptic packaging technology started in the 1970s, and developed rapidly in the late 1980s and early 1990s. From the initial introduction of foreign complete sets of aseptic equipment production lines and packaging consumables to independent research and development, China's aseptic packaging technology has gone through a process from scratch, and gradually moved towards maturity

2.1 development status of aseptic packaging technology

at present, with the continuous updating of sterilization technology, aseptic packaging technology is gradually getting rid of the traditional mode and developing towards a new sterilization method. For example, the combination of high-intensity ultraviolet light and low concentration hydrogen peroxide is used to sterilize the packaging container. When ultraviolet sterilization or hydrogen peroxide sterilization is used alone, its effect is limited to a certain extent, and the combination of the two has amazing sterilization effect. Using hydrogen peroxide with a concentration of less than 1% and high-intensity ultraviolet light, the bactericidal efficacy at room temperature is 100 times that of the two alone. Because the concentration of hydrogen peroxide is very low, there is no need to take measures for the residual hydrogen peroxide, which avoids the problems of high temperature and long time for traditional hydrogen peroxide sterilization

in addition, the sterilization technology of products has also been improved. For example, the secondary sterilization method, which combines the advantages of UHT sterilization method and retention sterilization method, is quite popular at home and abroad at present. It is mainly used in the production of bottled milk. It uses UHT sterilizer to sterilize milk at ℃, 0 After heating and sterilization under the condition of S, bottle and cover, and then maintain sterilization at ℃ for min. As the milk is basically sterile after UHT sterilization, the heating intensity to maintain sterilization can be significantly reduced, and the flavor and color of the products can be significantly improved

there is also the application of ultra-high pressure sterilization technology, which is to put the product under the pressure of more than 500MPa for sterilization for a period of time, kill most or all of the microorganisms and inactivate the activity of enzymes, so as to achieve the purpose of preserving food. Because the pressure of hundreds of MPA will not increase the temperature of food, there is no deterioration of color, aroma, taste and nutrients, and the original flavor of food can be retained more. There are 10 large plastic markets

2.2 development status of sterile packaging equipment and sterile packaging materials

in the mid-1980s, China began to introduce sterile packaging production lines and packaging materials produced by Tetra Pak of Sweden and international paper of the United States. However, with the development of aseptic packaging industry, import alone can no longer meet the production needs. Facing the expanding aseptic packaging market and fierce market competition, domestic aseptic packaging equipment factories have also begun their own research and development. The fully automatic aseptic packaging machine developed and produced by Anhui Keyuan group has reached the international and domestic leading level in its comprehensive performance. The sterilization process adopts hydrogen peroxide and strong ultraviolet sterilization system, which ensures the hygienic requirements of liquid milk in the packaging process. The packaging yield reaches 98%, and has a good shelf image. The yogurt plastic cup molding and filling production line produced by Hangzhou Zhongya Packaging Co., Ltd. has a high degree of output and automation. In addition, Shanghai People's plastic printing factory has also developed composite paper suitable for various models, which has reached a considerable level. Domestic enterprises have taken the step of independent research and development, breaking the situation of long-term import of sterile equipment

3. Development trend of aseptic packaging technology in China

with the continuous improvement of people's living standards, the strengthening of people's consumption awareness and the change of consumption concept, China's aseptic packaging industry will face new opportunities and development space

taking China's dairy market as an example, according to the survey, China's per capita annual milk consumption is only 6.4 kg, far lower than the international average of 105 kg. According to China's "Tenth Five Year Plan", in 2005, China's per capita milk share reached 10 kg/year, and the total output reached 13.5 million tons/year; By 2030, the per capita volume of milk will reach 25 kg/year, and the total output will reach 42.5 million tons/year, with a bright market prospect. According to the statistics of China Dairy Association, there are nearly 1500 dairy production enterprises in China, with an annual output of 8million tons, but 90% of them are small-scale operations, with a daily output of less than 100 tons, and only a few have advanced ultra-high temperature sterilization production lines. China's dairy market is in urgent need of high-tech packaging. It is reported that the state has listed the aseptic packaging of liquid milk as the first development project, and invested 2billion yuan to support the development of the liquid milk industry

in addition to the dairy industry, there are many markets for us to develop, such as fruit juice beverage and vegetable juice processing industry. The market potential of sterile packaging is huge

with the further deepening of reform and opening up and China's entry into WTO, China's food industry will face a comprehensive structural adjustment. It is a trend for enterprises to join and merge with each other and expand production scale. As an advanced technology for liquid food packaging, sterile packaging technology has a broad application prospect

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