The current situation and application of aseptic p

One of the current situation and applications of aseptic packaging of food (including dairy products and beverages)

aseptic packaging of food refers to the packaging of sterilized food (beverages and dairy products) in a sterile environment and closed in sterilized containers, in order to obtain a long shelf life without preservatives and refrigeration. It can also be simply said that aseptic packaging is sterilization before packaging, non sterile packaging is packaging before sterilization, or only packaging without sterilization. The main advantage of aseptic packaging is that it can retain the original nutritional components and flavor of food to the greatest extent and reduce losses under the condition of ensuring sterility. Because it is more convenient to use ultra-high temperature instantaneous sterilization method to disinfect the food before packaging, while other packaging methods are quite difficult

aseptic packaging can be divided into large packaging and small packaging according to the packaging capacity. The former has a packaging capacity of liters, up to 1000 liters. It is mainly used for packaging thick pulp and base materials for sub packaging and sales by food manufacturers. Among them, the rising can also directly supply household consumption. The latter has a packaging capacity of ML, which is for marketing and direct supply to consumers

small packages can be divided into brick bags, roof bags, plastic cups, plastic bags, plastic bottles and other packaging forms

a complete sterile packaging production line includes material (food) sterilization system, sterile packaging machine, supply and sterilization system of packaging materials or packaging materials, automatic cleaning system, equipment pre sterilization system, sterile environment maintenance system and automatic control system. So far, the sterilization of materials mainly adopts thermal sterilization. According to the viscosity, thermal sensitivity and production scale of materials, plate type, tube type (coil type or tube type), scraper type or mixed type heat exchangers can be used respectively. In order to further shorten the heating and cooling time of materials, the manufacturer has developed and produced direct heating methods such as steam injection, steam mixing, superheated water mixing, ohmic heater, etc

at present, chemical drugs are mainly used for sterilization of packaging materials or packaging containers, but after sterilization, they should be thoroughly cleaned and dried to reduce chemical residues to the minimum (1ppm). The characteristics are: hassia uses steam heating method to sterilize the container, ERCA uses a layer of peelable PP film to protect the clean surface in contact with the material, and automatically removes the protective film before the packaging material enters the sterile channel, so that the clean surface directly enters the bacterial channel without sterilization. The sterile packaging bag used for large bag packaging is sterilized with the radiation produced by cobalt 60 after sealing. The mouth of the bag is sterilized with steam before entering the sterile filling room

most sterile packaging systems use superheated steam or dry air for pre sterilization. Sterile air or nitrogen is mostly used to maintain the sterile environment of the system. Overpressure method or laminar flow method can be adopted according to different requirements

the current situation and existing problems of sterile packaging at home and abroad

there is no bottleneck that restricts the development of China's polymer surface material industry. Bacterial packaging technology was born in the late 1940s. Since the 1960s, due to the rapid development of packaging plastics, it has provided a broad development world for the development of sterile packaging. As the advantages of aseptic packaging were soon recognized by the majority of consumers, the market expanded rapidly. Aseptic packaging technology, equipment and materials have developed rapidly. By the early 1990s, aseptic packaging accounted for more than 80% of food packaging, and more than 50% of small packaging. By the mid-1990s, there were more than 30 foreign companies producing various sterile packaging equipment, and many supporting manufacturers producing sterilization systems, packaging materials and components. Domestic research and production of sterile packaging equipment and supporting sterilization systems, packaging materials units are also gradually increasing

manufacturers of large packaging equipment include elpo company in Italy, astepo company, Tetra Pak company in Sweden, KF Company in Germany, elecster company in Finland, etc. The manufacturers of brick type bag and roof bag equipment include Tetra Pak of Sweden, international paper company of the United States, pkl company of Germany, KF Company, etc. Manufacturers of plastic cup-shaped packaging equipment include gasti company in Germany, Bosch Company, hassia company, ERCA company in France, etc. Manufacturers of plastic bag packaging equipment include KF Company in Germany, elecster company in Finland, Chengnan company in Japan, etc. Manufacturers of plastic bottle packaging equipment include Swiss company tommelag, French se RAC for floor systems and wall materials, Italian company sipa-procomac, Dutch company stork, etc

in addition, some companies have formed groups in order to enhance their competitiveness. For example, Tetra Pak and Alfa Laval jointly formed Tetra Pak Laval, and ERCA joined Jagenberg group. Some large group companies have developed and produced sterile packaging equipment. For example, American international paper, German Bosch, Dutch stork and other companies have all produced sterile packaging equipment in the field of lithium-ion battery consumption in China in 2017

the relevant leading authorities in China have attached great importance to the development of aseptic packaging technology from the beginning. During the "Seventh Five Year Plan" period, the Ministry of light industry (now the Light Industry Federation) included the development of aseptic packaging technology in the national "Seventh Five Year Plan" key scientific and technological research projects. China Packaging Technology Association and China Food Industry Association have established aseptic packaging committees to promote the development of aseptic packaging technology. China Dairy Association and China Beverage Industry Association all pay special attention to aseptic packaging

more and more domestic units are engaged in the development and production of sterile packaging equipment, materials, processes, components and parts. Beijing Institute of aeronautical technology has developed and produced a large bag sterile packaging production line, which has passed the national appraisal and won the National Award. Shenyang Automation Instrument Research Institute and Guangdong Far East food packaging machine company have developed and produced aseptic packaging equipment for large bags and brick bags respectively. Ningbo light industrial machinery factory has developed and produced coil heat exchangers. Yangzhou Changlong aseptic packaging company, Longxi composite flexible packaging material factory and Guangzhou jinweilong Industrial Company have developed and produced large bags for aseptic packaging respectively. Beijing Changkong sheet factory and Hebei Eka packaging materials company have developed and produced composite sheets, standard materials and top cover materials for aseptic packaging of plastic cups respectively

however, Golz, the majority of consumers, said: "This greatly simplifies the operation, and the understanding of sterile packaging is not enough. Generally, they only know the difference between iron cans, plastic cups and carton packaging, but do not know the difference between sterile and non sterile packaging. While the manufacturers of sterile packaged food, equipment and materials often ignore the publicity that emphasizes the advantages of sterile packaging, only say how our products are, and ignore the publicity of commonalities. At the same time, the society about plastic pollution The publicity of dyeing has been strengthened day by day, leading consumers to doubt the sterile packaged food made of plastic and cartons. At present, many large beverage manufacturers are converted from Cannery, so they continue to use the original packaging equipment and packaging methods. In short, there are many objective reasons for the slow development of aseptic packaging in China's food industry

from the perspective of the development of aseptic packaging itself, at present, most domestic aseptic packaging equipment for food is imported from abroad, and many packaging materials and spare parts also rely on imports. The price is too high, and the depreciation fee and bank loan interest put great pressure on the manufacturers. On the other hand, imported aseptic packaging equipment has advanced technology and complex use and maintenance, and the personnel quality of some small and medium-sized enterprises cannot improve in a short time, which also leads to insufficient operating rate

from the perspective of the overall level of aseptic packaging in the world, its development is still not perfect, the production scale of single machine is not large enough, and the steamed drinks, beverages with granules cannot be packaged, and solid foods cannot be packaged. The solution of these problems still needs the further development of aseptic packaging technology. New materials for aseptic packaging need to be further developed

the development of aseptic food packaging will gradually change with the understanding of consumers, and people will consider more and more about the nutrition, hygiene and performance price ratio of food. In the next few years, the existing well-known manufacturers in the food industry will have the requirements to expand production and update equipment. A number of new large, medium and small food enterprises will be built, and the cultural and technical quality of enterprise personnel will be greatly improved. All these are the material basis for the great development of sterile packaging. In addition, due to its obvious advantages, aseptic packaging technology will gradually be developed in dairy industry, wine making industry, condiment industry, pharmaceutical industry, cosmetics industry and other fields