Unit_4_-_Metal_Packaging

Unit_4_-_Metal_Packaging - therefore its use including...

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4.4.2 Aluminum Aluminum is the third most abundant element on earth, but is in a form that is not readily amendable to the extraction of metallic aluminum (what we need for packaging). Aluminum ore (bauxite) contains large concentrations of aluminum oxide requiring a lot of energy to reduce the oxide to metallic aluminum. While it is common today, aluminum was very rare until the 20th century. Around the end of the 19th century, improved extraction techniques and reliable supplies of energy made aluminum available at an acceptable cost;
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Unformatted text preview: therefore, its use, including packaging applications, developed rapidly. In the US, we have very little bauxite, so we import virtually all of the aluminum we consume (other than what we get through recycling). Compared to a similar volume of steel, its weight is about 1/3 and it has about 1/3 as much strength. Some characteristics of aluminum include being: Steel Cans for Food Products...
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