Review and Prospect of the hottest food packaging

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Review and Prospect of food packaging container industry

the continuous improvement of people's requirements for food packaging is the main driving force for the continuous development of the packaging industry. Since there is food, there is also packaging. But the real sense of food packaging should start with the storage of food in cans

the canned food industry originated in the early 19th century. In 1804, Nicolas Appert of France successfully studied the use of glass bottles to preserve food, resulting in the use of corked glass bottles as food packaging containers. From then on, the industrial production of glass bottles and cans began. Therefore, after long-term continuous improvement and development, food glass cans with beautiful appearance and various sealing forms have been formed in the current food industry

in 1810, Peter Durand of England used tinplate to make food packaging containers, the so-called tin cans. At that time, only scissors, chrome iron and other tools were used for manual production, and the daily production of cans per person was only 60 ~ 70. In 1847, the United States used a punch to punch the blank of the bottom cover of cans. In 1849, the punch was officially made, laying the foundation for the manufacture of three piece cans. In 1859, Europe began to adopt the can sealing machine that directly covers the bottom of the can body and automatically seals it. Therefore, the sealing method of tinplate cans is changed from embedded (or embedded) tin welding to curling, and rubber rings are used instead of sealing welding. In 1896, the operation process completely depended on the operation degree of the operator. In the United States, the base was first supplemented by aluminum alloy profile columns with advanced plastic spraying treatment; The thick rubber ring was replaced by liquid rubber, and the liquid rubber coater was made in 1897. The sealing crimping was also improved, and the double crimping was adopted. Due to continuous improvement, the automatic can making machine has developed smoothly. In 1910, the can making capacity per minute has reached 120. The automatic can making machine made in 1930 can produce 300 cans per minute, and the modern automatic operation line can produce more than 1000 cans per minute

an electric welding can making machine with a can body seam width of 0.8mm was made in Switzerland in 1975, and a resistance welding can making machine with a can body seam width of 0.4mm was made in 1978. Thus, the joint condition of the three piece tin can body is improved, the manufacturing process of the three piece tin can is updated, the production of the three piece tin can is greatly improved in both quality and output, and the lead pollution of the joint tin can is completely eradicated from the process. In the production of can making, a new type of three piece can with nylon bonded joints has also appeared

the punching and drawing process for manufacturing two-piece cans was formed in 1847, and later developed from shallow punching cans to deep punching cans made by multi-stage deep drawing. As for deep drawing technology, the United States first introduced the impact extrusion method in 1964, and then introduced the deep drawing and tank wall thinning method in 1968. Making auto parts with carbon fiber composites can effectively reduce the overall quality of cars, so food packaging containers have been newly developed. Since 1963, various aluminum alloy easy to open cans have also been developed accordingly

tin plate plating (ETP) appeared in can making materials after hot-dip tin plate (HTP). In 1934, Germany built a tin plating production line, and in 1937, the United States first produced tin plating with a tin plating capacity of 5.59g/m2. Based on the advantages of electroplated tin plate, it has all replaced hot-dip tin plate. In 1930, Norway began to use aluminum alloy plates to make packaging containers. In the early 1960s, in order to reduce the amount of tin, Wuxi steel sheet chromium plated plate (TES) was used to make packaging containers. It has also tried to use stainless steel sheet and other materials to make bags to fit the requirements of the State Council

in addition, various plastic and paper composite materials have been put into canning production, making food packaging containers expand from hard cans to soft cans, and the varieties of packaging containers are more novel, diverse and practical. The cooking bag used in soft canned food, which was first put on the market in Japan in 1968, is a kind of soft food packaging container made of composite film composed of plastic film and aluminum foil

in order to improve the use value of food packaging containers and enhance its storage effect on various foods, inner wall coatings have been widely used in metal packaging containers. Canning paint began in 1903. At that time, in order to prevent the fading of red fruits, an oleoresin paint was used. Later, canning paint to meet the needs of various canning has been developed. In addition, color printing coatings outside cans have also been developed

in fact, as early as 3000 years ago, the working people in ancient China used ceramics as cans to store food. This is detailed in books such as Qi Min Yao Shu and Da Ye Shi Yi Ji. However, the development of food packaging technology in China is very slow, and it has not made much contribution to the development of modern food packaging technology. Only after the founding of new China, especially after the reform and opening up, the packaging industry began to advance by leaps and bounds. At present, it is basically close to the world level. Looking at the history of China's industrial development, the reason why the development is too slow is mainly caused by the long-term isolation of China's slave society and feudal society and the lack of attention to the development of science and technology. Now, China's packaging industry has become a big industry penetrating all fields, and its future is immeasurable

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