The history and development prospects of beverage cans

In the past more than ten years, the beverage cans industry has undergone drastic changes. The organizational structure between the can-making company, the raw material supply company, and the commercial customers has undergone several integrations, resulting in a number of new initiatives and innovations. As a result of these innovations and innovations, beverage cans have gradually formed a variety of products, and many companies have produced new production varieties. At present, the beverage can industry has a consensus that the next technical challenge is the lightweight development of beverage cans and that there is a great need for collaborative research. Therefore, new initiatives for the further development of the industry must rely on the cooperation of the industry.

As early as the 1930s, the earliest beer beverage cans were successfully developed and produced in the United States. This is a three-piece can made of tinplate material – a three-piece beer can made from cans, top lids, and bottom cans of three tinplate materials. It is a three-piece closed canopy in the upper part of the conical opening. tank. At the beginning, this can was filled on a glass bottle production line, and it was not until the 1950s that there was a dedicated bottling line for beer and beverages. Soon, they also researched and developed a new type of stainless steel flat cover that is equipped with triangles on the side of beer and beverage cans (known as "Church Key" in the industry). Only in the 1960s did aluminum round appear. Loop-opening new can lid.

In the early 1960s, two-piece cans were created - deep cans (called DWI cans) consisting only of can body sheets and lidstock sheets, making substantial progress in beverage canning technology. Annual production of 180 billion two-piece DWI cans. It is estimated that there are a total of 400 billion cans in the world canned market (including general edible cans and solsol cans), of which aluminum two-piece cans have the most DWI beverage cans.

Aluminum cans have dominated the world canning market for more than 35 years and currently have a sign of entering the market recession period from the perspective of the product shelf life cycle. In the past, most companies that have accumulated a lot of development experience and research funding have invested in the production of DWI beverage cans. However, the number of companies that have continued to invest in DWI beverage cans in recent years is much smaller. In recent years, the industry’s asset accumulation contraction has been in the warning line.

In the course of studying the history of can making technology, we can see the history of a lightweight development of beverage cans. Aluminum DWI cans averaged 55 pounds (25 kg) per 1000 cans in the early 1960s. Reduced to 44.8 pounds (20.3 kg) in the mid-1970s, today it has been reduced to 33.0 pounds (15.0 kg), and lightweight changes have reduced the average weight per 1000 cans by approximately 40%. The lightweight development of beverage cans is not only the result of collaborative research between can body/can lid manufacturing companies, but also the result of close cooperation between aluminum materials and coatings and manufacturing equipment manufacturing companies.

The earliest aluminium cover manufactured by the Conti-nental Can Co. in the 1960s was made of 5086 aluminum alloy plate with a hardness of 18 and a plate thickness of 0.39mm. It was called 211 (mm) diameter U. -Tub cover. This design was introduced by Dyson. In addition, the Ring Pull is an easy-to-open method (Rogor Tab) that uses a hand-pulling knife, and is made of 5182 alloy steel with a hardness of 19 and a plate thickness of 0.355mm. When it is opened, it is mostly pressed with a finger. The method can be easily and easily opened. It is a pioneer in riveting Rivet technology. The innovation of this technology has benefited from the cooperation between the coating production company and the aluminum material production company as well as the tool and equipment production and supply companies. They successfully developed the scores to prevent the cans from scoring and rivet riveting areas. Exposed new technology.

In 1969, the diameter of the lid was reduced from 211 (mm) to 209 (mm) for the first time, and the diameter of the lid was reduced for the first time. Reynolds has reformed the pull ring after improving the diameter of the can lid: the support tube cover (Stayon-Tub, SOT) made of 5182 aluminum alloy sheet. The company then obtained a license to manufacture this new can lid.

In 1980, there were differences in production technology between cans for beer packaging and cans for packaging soft drinks. The beer production company used can lids with a plate thickness of 0.28-0.30 mm and a diameter of 207.5 (mm), while the production of refreshing beverage companies used can lids with a plate thickness of 0.33 mm and a diameter of 209 (mm). It is fixed in time. This is the earliest production and use of two different can bodies and lids. The manufacturing facilities for can lids and can bodies are inevitably adjusted: Stopping the molds to adapt to each other, using different molds to complete cans for beer packaging And packaging of refreshing beverage cans.

Afterwards, the production company of the can body and the lid increased the development of the equipment in terms of productivity and the speed of can making. In the 1970s, the speed of can making was 650-1000 per minute. By the 1980s it had increased to 1000-1750 per minute. Now it has exceeded 2000 per minute. Can lid production also increases production speed in order to maintain synchronicity.

In the 1980s, the Continental can introduced a can lid called B-64, which is a 206-mm diameter can lid, reducing the size of the double curl. Furthermore, the thickness of the lidstock sheet is further reduced to 0.24mm, reducing metal usage: On average, only 9 pounds (4.1kg) of sheet metal are used per 1000 can lids. At this time, the refreshing beverage production company used a can lid with a diameter of 209 (mm) in about 10 years, so it is very welcome to change the new lid type with a diameter of 206 mm. After two years, the beer production company also completed the modification of a new can lid with a diameter of 206 mm.

Beer companies and refreshing beverage companies have adopted a can lid with a diameter of 206 mm, in addition to a slight difference in sheet thickness. This is a welcome change in the lid's diameter of 206 mm. In the early 90s of the last century, two new cover types were developed, namely, can lids with diameters of 204 (mm) and 202 (mm), and then entered a new era of using different can lids. From an economical point of view, the beer company prefers a 204-mm-diameter lid, and the refreshing beverage company prefers a new 202-mm diameter can lid.

Since 1992, refreshing beverage companies and beer companies have again adopted different types of packaging cans for can bodies. The same problems as in the past have been caused by low production capacity and flexibility and high production cost of equipment, which has become an important reason for the production companies to discuss the unification. The beer production companies other than Anheuser-Busch and Coors do not manufacture their own containers. They need to purchase canned containers for beer packaging from the canning company. In addition to being limited by development funds, it is also influenced by the scarcity of companies that produce equipment. Five years later, empty can manufacturing and sales began to increase from the low point of the market, killing beer and soft drinks surrounded by plastic bottles.

Relevant experts believe that the integration of beverage producers and container producers is the future of industrial development. The future research of aluminum two-piece cans will be oriented towards the most cost-effective and convenient use of consumers and the most willingness to accept the use of the products, thereby producing highly efficient packaging containers. The metal can containers will further break away from the market encirclement of glass bottles and plastic bottle packaging containers, so as to embark on the throne of the market packaging container crown.

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