Development of flexible packaging technology for t

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The development of flexible packaging technology for meat products

the total output of meat in China has been ranking first in the world since 1990. However, the proportion of deep processed meat products in China accounts for only 10% of the total output of meat. In the world, the proportion of developed countries generally reaches about 50%, and some countries even reach more than 70%, which is quite far from the advanced level. More importantly, the variety and quality of meat products lag behind the world's advanced level. The key reason is related to the packaging technology of meat products, mainly the development of soft packaging technology

looking at the development history of meat food in China, it is closely related to the development of packaging technology. The main one is related to flexible packaging technology. The technological innovation of the meat industry needs the support of flexible packaging technology. On the contrary, the emergence of new flexible packaging technology also promotes the development of the meat industry. In the past development period, the development of many domestic flexible packaging technology and equipment lagged behind the needs of the development of meat products, so that domestic flexible packaging enterprises lost many opportunities, and a considerable number of imported packaging materials and packaging machinery and equipment occupied the domestic market. The purpose of this study is to remind all aspects of the domestic flexible packaging industry to pay attention to, don't miss the opportunity, speed up the technological progress and product development of the flexible packaging industry, and meet the third great development of China's meat industry. The following describes the flexible packaging technology and its development direction of meat food from two aspects: fresh meat and meat products

■ flexible packaging of fresh meat

it is estimated that China's meat production will continue to grow at an annual growth rate of 5% - 10% in the next 5-10 years. The main one is the development of fresh meat. How to keep up with this development of flexible packaging technology of fresh meat is a concern in the industry. The flexible packaging of fresh meat mainly solves the problem of safety and quality assurance in the consumption and circulation of meat. Fresh meat from pigs, cattle and other live animals after slaughtering will produce a series of biochemical changes. The quality of meat is also changing from the stiffness period to the end of the maturity period. If scientific packaging and quality assurance technology is not adopted, fresh meat will soon deteriorate. In view of the quality requirements of fresh meat, domestic and foreign countries have adopted a combination of packaging and quality assurance technologies, such as freezing, refrigeration, irradiation sterilization, chemical corrosion prevention, vacuum packaging, inflatable packaging, etc

in the early 1980s, frozen meat accounted for a large proportion in China's market. At that time, many foreign advanced equipment and technologies for segmenting and packaging frozen meat were introduced. The main packaging material began with single-layer polyethylene bags, and then developed to the flexible packaging of nylon/polyethylene composite bags. The packaging forms ranged from simple single film plastic packaging bags to composite bag vacuum packaging and soft film forming vacuum packaging. In addition to the domestic vacuum sealing packaging machine, the imported soft film forming → filling → sealing machine (FFS machine) was the most advanced soft packaging equipment at that time. The packaging products are mainly leg meat, large chops, small chops, minced meat and other products in frozen split small packages, which played a certain role in meeting the market demand at that time. However, at that time, the flexible packaging of fresh meat was generally in the low-level stage, and the packaging material was mainly polyethylene film. Due to the high moisture permeability of polyethylene material, the dry consumption of frozen meat during the storage period was large, the frosting in the bag was serious, the appearance and shape of the packaging were poor, and most of the products were rough in printing and decoration. Therefore, the level of merchantability of raw meat including frozen meat packaging in China in the 1980s was low

■ soft packaging of cooked meat products

cooked meat products in China can be divided into Chinese cooked meat and Western cooked meat products. In the past, the industrialized production and packaging technology of Chinese cooked meat products were relatively backward, and the products were mainly divided into traditional sauce and brine, barbecue, distiller's wine, dry products and other varieties; Western style meat products are highly industrialized. The main products are western style ham products with square and round legs, sausage products with red sausage and small red sausage, bacon, salami and other western style products. Due to the different processing conditions and quality requirements of various products, the soft packaging forms and technologies of these cooked meat products are different. The main soft packaging technologies of cooked meat products are introduced below

aseptic packaging and semi aseptic packaging aseptic packaging and semi aseptic packaging technology were first developed and applied to Western-style meat products. Aseptic soft packaging materials were used to package the sterilized meat products in a sterile environment, which could maximize the original flavor of the food. The products circulated under low temperature conditions. Western style round legs, square legs and sliced Western-style meat products were difficult to aseptic treatment of solid food, Therefore, most of them require a positive relationship between displacement change and resistance change. Semi sterile packaging technology is used. Packaging materials include high barrier multilayer sterile film or sheet formed by composite coextrusion of EVOH, PVDC, PE, PA and other materials. Composite heat shrinkable film is also mostly used in sterile packaging. The aseptic and semi aseptic packaging technology of Chinese meat products needs further development and research. The breakthrough of this technology will maintain the original flavor of Chinese meat products and extend the shelf life, which has a very broad application prospect

pasteurization packaging in the next few years, China will vigorously develop low-temperature meat products, of which the key technology is the quality assurance technology of low-temperature meat products. Low temperature meat products are increasingly favored by the market because they maintain the nutrition and flavor of the products to the greatest extent. One of the key technologies for the quality assurance of low-temperature meat products is pasteurization packaging, that is, the product is heated after packaging and then cooled rapidly after pasteurization, so as to eliminate microbial pollution in the packaging process. This kind of meat product packaging can be applied to most Chinese and Western meat products. The flexible packaging materials are mainly transparent high barrier composite films and sheets. At the same time, the composite heat shrinkable materials that can be pasteurized will also be widely used. The fire retardant ring ga304 ⑵ 001 of UPVC building drainage pipe will also have a great development in terms of molding, filling and sealing system with a high degree of mechanization and automation in addition to vacuum packaging

casing packaging in the 1980s, polyvinylidene chloride (PVDC) based film casing filling enema was used. Ham sausage after high-temperature sterilization began to appear in China. In the 1990s, it unexpectedly developed into a fist product that accounted for half of the domestic meat product output. However, PVDC casing and ham sausage filling and punching packaging machine were mainly imported from Japan, More than 600 production lines have been repeatedly introduced. The popularity of ham sausage has its actual situation of market and national conditions. China's flexible packaging industry missed the opportunity at that time, and the main body is colleges and universities. However, ham sausage, as a high-temperature meat product, is no longer the direction of development in the future, while low-temperature sausage meat products, fermented meat products, high moisture and low salt expansion products of casing flexible packaging will be the direction of development. Various artificial fiber casings, high barrier composite casings The technology of soft packaging materials such as heat shrinkable casings and corresponding filling and packaging equipment has great development potential

in the 21st century, China's meat industry is facing a new development period, and it is also an opportunity full of challenges and opportunities for the flexible packaging industry. The great attention to food safety issues worldwide, the promotion of HACCP system in the food field, and the high-tech, diversified structure and convenient eating meat industry have put forward new requirements for the flexible packaging industry, It is hoped that domestic enterprises will strengthen scientific and technological investment and new product research and development to meet the market requirements of continuously developing high-end film blowing quality and winning the favor of high-end commodity packaging

source: China Food Quality News

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