Current situation and existing problems of aseptic

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Current situation and problems of aseptic packaging of food and beverage

aseptic packaging of food refers to packaging sterilized food (beverage and dairy products) in a sterile environment and sealing them in sterilized containers, so as to obtain a longer 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 in the food to the greatest extent and reduce the loss under the aseptic condition. Because it is convenient to use ultra-high temperature instant 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 L, up to 1000 L. It is mainly used to pack thick pulp and base materials for various political and economic reasons, and for food manufacturers to sell them separately. Among them, l can also directly supply household consumption. The latter has a packaging capacity of ML, which is available for marketing and direct supply to consumers

small packaging can be divided into brick packaging, roof packaging, plastic cup, plastic bag, plastic bottle and other packaging forms

a complete aseptic packaging production line includes material (food) sterilization system, aseptic packaging machine, packaging material or package supply and sterilization system, automatic cleaning system, equipment pre sterilization system, aseptic environment maintenance system and automatic control system. Up to now, the material sterilization is a complete and cost-effective solution through the use of commercially available standard ingredients. Thermal sterilization is mainly used. According to the viscosity, thermal sensitivity and production scale of materials, plate type, tube type (coil type or tubular 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 and ohmic heater

at present, the sterilization of packaging materials or packaging containers mainly uses chemical drugs, but after sterilization, it should be thoroughly cleaned and dried to reduce the chemical residue to the minimum (1ppm). The features are: hassia company sterilizes the container by steam heating method, ERCA company 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 for large bag packaging is sterilized with the radiation produced by cobalt 60 after sealing. The bag mouth 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

current situation and existing problems of aseptic packaging at home and abroad

aseptic packaging technology was born in the late 1940s. Since the 1960s, the rapid development of packaging plastics has provided a broad development world for the development of aseptic 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, the proportion of aseptic packaging in food packaging exceeded 80% for large packaging and 50% for 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 aseptic packaging equipment and supporting sterilization system, and the units of packaging materials 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 package and roof package equipment include Tetra Pak of Sweden, international paper company of the United States, pkl company of Germany, KF Company, etc. The manufacturers of plastic cup packaging equipment include gasti company, Bosch Company, hassia company, ERCA company, etc. Manufacturers of plastic bag packaging equipment include KF Company in Germany, elecster company in Finland, Chengnan company in Japan, etc. The manufacturers of plastic bottle packaging equipment include Switzerland tommelag, France Serac, Italy sipa-procomac, and Netherlands stork, which imports 14.43 million tons of steel

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 aseptic packaging equipment. For example, American international paper, German Bosch, Dutch stork and other companies all produce aseptic packaging equipment

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

more and more domestic units are engaged in the development and production of sterile packaging equipment, materials, processes and components. Beijing Institute of aeronautical technology has developed and produced a large bag aseptic 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 industry machinery factory has developed and produced coil heat exchanger. Yangzhou Changlong aseptic packaging company, Longxi composite flexible packaging material factory and Guangzhou jinweilong Industrial Company have developed and produced large aseptic packaging bags respectively. Beijing Changkong sheet material factory and Hebei Eka packaging material company have developed and produced composite sheets, standard materials and top cover materials for aseptic packaging of plastic cups respectively

reprinted from: China polymer

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