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An aluminum can is a container for packaging made primarily of aluminum (British English: aluminium). It is commonly used for foods and beverages but also for products such as oil, chemicals, and other liquids. Global production is 180 billion annually. ==Usage== Use of aluminum in cans began in 1957.〔(''Petroleum week'' ), Volume 9, 1959, p. 82 (Google Books)〕 Aluminum offers greater malleability, resulting in ease of manufacture; this gave rise to the two-piece can, where all but the top of the can is simply stamped out of a single piece of aluminum, rather than laboriously constructed from two pieces of steel. A label is either printed directly on the side of the can or will be glued to the outside of the curved surface, indicating its contents. Most aluminum cans are made of two pieces. The bottom and body are "drawn" or "drawn and ironed" from a flat plate or shallow cup. After filling, the can "end" is sealed onto the top of the can. The advantages of aluminum over steel (tinplate) cans include; * light weight * competitive cost * usage of easy-open aluminum ends: no need for a can opener * clean appearance * aluminum does not rust The easy-open aluminum end for beverage cans was developed by Alcoa in 1962 for the Pittsburgh Brewing Company 〔http://www.alcoa.com/global/en/about_alcoa/time_machine/time_machine_html.asp〕 and is now used in nearly 100% of the canned beer market. 〔http://bestinpackaging.com/2012/10/14/beverage-can-ends-and-its-opening-devices/〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「aluminum can」の詳細全文を読む スポンサード リンク
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