On the development of the hottest food packaging c

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Random talk on the development of food packaging containers. The development of human civilization is accompanied by the development of food civilization, and the development of packaging is no exception. 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 was food, there was packaging. But the real sense of food packaging should start from the can storage of food

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, so that glass bottles with corks were used as food packaging containers. From then on, the industrial production of glass bottles and cans began. Therefore, after long-term continuous improvement and development, the food glass cans with beautiful appearance and various sealing forms have been formed in the current food industry

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 which directly covered the tank bottom cover on the tank body and automatically sealed it. Therefore, the sealing method of tinplate can is changed from embedded (or embedded) tin welding to curling, and the sealing welding is replaced by rubber ring. In 1896, the United States first used liquid rubber to replace thick rubber rings, and made a liquid rubber coater in 1897. It also improved the sealing and crimping. Two other samples were used, and the cutting of the other two samples required strict control of re crimping. Due to continuous improvement, the automatic can making machine has developed smoothly. In 1910, the can making capacity per minute 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

in 1975, Switzerland made an electric welding can making machine with a joint width of 0 and a density of 30 (5) 0kg/m3.8mm of rigid polyurethane foam. In 1978, a resistance welding can making machine with a joint width of 0.4mm was made. 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 both in 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 whose body joints are bonded with nylon 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 the 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, thus the food packaging containers have been newly developed. Since 1963, various aluminum alloy easy opening cans have 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. In 1937, the United States first produced tin plating plates with a tin plating capacity of 5.59g/m2. Based on the advantages of electroplated tin plate, it has 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. We have also tried to use stainless steel sheet and other materials to make packaging containers

in addition, various plastic and paper composite materials have been put into canning production, which has expanded the food packaging containers from hard cans to soft cans, and the varieties of packaging containers are more novel, diverse and practical. The cooking bag used for soft canned food, which was first put into 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

the market of PAN based carbon fiber composites is 165.3 billion yen (about 8.6 billion yuan). 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. The coating for the inside of cans began in 1903. At that time, in order to prevent the fading of red fruits, an oleoresin coating was used. Later, it was successively developed to meet the needs of various cans. 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 recorded in detail in Qimin Yaoshu, Daye Shiyi Ji and other books. However, the development of China's food packaging technology is very slow, which 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, did the packaging industry begin to develop by leaps and bounds. At present, it is basically close to the world level

looking at the history of China's industrial development, the main reason for the slow development is that China's long-term slave society and feudal society were closed to the outside world and did not pay 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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