The Benefits of Aluminium Beverage Cans
Aluminium is highly suitable as a packaging material for beverages because of its:
Durability: It does not corrode easily.
Weight: With a density of 2.70g/cubic cm (compared with iron used in steel 7.86g/cubic cm), aluminium products are very light, cutting down on transport costs.
Malleability: It can be rolled into extremely thin foil and can be cast and joined and still retain much of its strength, which adds to its value as a light packaging material because less of it needs to be used.
High thermal conductivity: Aluminium transfers heat 2.4 times faster than iron. This, combined with the fact that very thin sheets can be produced, means that heat is lost and gained through aluminium very quickly. Hence it is ideal for cooking and as a cold drink container.
Low melting point: A melting point of 660°C compared with 1540°C for iron means aluminium requires much less energy to melt for processing and recycling.
Aluminium beverage cans have a protective polymer coating applied on the inside to prolong storage life. This polymer coating ensures that the acids and salts in beverages never actually come into contact with the metal.
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