What is the material used in food packing, which we will call as aluminium foil?

Answer 1

The one that we call "aluminum foil" is generally termed as foil laminates. It contains different layer of materials and not just aluminum alone. Usually the structures are Ny/Al/PE (for Nylon -1st layer, Aluminum - 2nd layer, and Polyethylene - 3rd layer), PET/Al/PE (for Polyethylene Terephthalate -1st layer, Aluminum - 2nd layer, and Polyethylene - 3rd layer), and PE/Al/PE (for Polyethylene -1st layer, Aluminum - 2nd layer, and Polyethylene - 3rd layer).

The aluminum film is usually sandwich between two plastic films because its not pliable and its brittle. Also, the 3rd layer is usually made of PE so that the packaging can be sealed during packing. The first layer is usually made of Nylon and PET because these materials can serve as printing substrates. It is where your artworks and labels are printed.

Answer 2

Hey:
Aluminium is the material used but it is used because it is thin and it can bend very easily and shaped into any figure, hence it can be rolled!
I figured that you would want to know how the foil is made so I am giving you some information!

Aluminium is the third most abundant element and thus it is easily available!
Aluminium Production

The aluminium production process involves two main stages:

· Alumina, or aluminium oxide (Al2O3) is refined from the bauxite in a caustic soda/high temperature process.

· Aluminium is obtained by an electrolytic smelting process, which breaks down the alumina into molten aluminium and oxygen. The silver-coloured molten aluminium is syphoned off into furnaces where other elements are added to produce particular alloys, before being poured into moulds to form ingots.

In round figures it takes 4 tonnes of bauxite to make 2 tonnes of alumina, which makes 1 tonne of aluminium.

The primary production process consumes about 14kwh per 1 kg of aluminium. Approximately 60 per cent of world aluminium production uses hydro-electric power, rather than non-renewable energy sources. Producing aluminium by recycling uses only 5% of the energy used in primary production: recycling aluminium, which has always been an important part of the industry, makes sense both commercially and environmentally.

Rolling the Aluminium Foil

The ingots of aluminium are heated to make them more malleable, rolled, passing backwards and forwards through large rollers as the slab gets thinner and thinner, and longer and longer. This metal strip is hot rolled to a thickness of 2 to 4 mm (2000 to 4000 microns) and then coiled, before being cold rolled to metal thicknesses of between 6 and 400 microns. The thinnest foil used for wrapping chocolates may be only 6 microns thick (about one-eighth the thickness of newspaper!), with household wrapping and cooking foil between 11 and 18 microns, lidding foil between about 30 and 40 microns, and foil for foil containers generally between 40 and 90 microns.






The foil is then annealed by a thermal process to make it pliable: great care is taken to ensure the correct balance between flexibility and strength for different applications.




Goodluck and I am happy if I helped!
Love SANAM

Answer 3

It is aluminum. Foil simply refers to the shape.

Answer 4

It is alluminium, what else it could be ? You yourself are telling that we call it as alluminium foil. Why will we call some other material as alluminium. Starange question !!

Answer 5

aluminum conducts the heat back into the food. and acids absorb aluminum, so don't do that.