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Aluminium foil acts as a total barrier to light and oxygen (which cause fats to oxidise or become rancid), odours and flavours, moistness, and germs, it is used broadly in food and pharmaceutical packaging. The purpose of aluminium is to make long-life packs (aseptic processing|aseptic packaging) for drinks and dairy goods, which allows storing without refrigeration. Aluminium foil containers and trays are used to bake pies and to pack takeaway meals, ready snacks and long life pet foods.

Aluminium foil is widely sold into the consumer market, often in rolls of 500 mm (20 in) width and several metres in length.It is used for wrapping food in order to preserve it, for example, when storing leftover food in a refrigerator (where it serves the additional purpose of preventing odour exchange), when taking sandwiches on a journey, or when selling some kinds of take-away or fast food. Tex-Mex restaurants in the United States, for example, typically provide take-away burritos wrapped in aluminium foil.

Aluminium foils thicker than 25 µm (1 mil) are impermeable to oxygen and water. Foils thinner than this become slightly permeable due to minute pinholes caused by the production process.

Aluminium foil has a shiny side and a matte side. The shiny side is produced when the aluminium is rolled during the final pass. It is difficult to produce rollers with a gap fine enough to cope with the foil gauge, therefore, for the final pass, two sheets are rolled at the same time, doubling the thickness of the gauge at entry to the rollers. When the sheets are later separated, the inside surface is dull, and the outside surface is shiny. This difference in the finish has led to the perception that favouring a side has an effect when cooking. While many believe that the different properties keep heat out when wrapped with the shiny finish facing out, and keep heat in with the shiny finish facing inwards, the actual difference is imperceptible without instrumentation.The reflectivity of bright aluminium foil is 88% while dull embossed foil is about 80%.

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Q:How to weld Aluminium alloy?
Q:What's the application of aluminum foil?
1. Aluminum foil can be stuck on the walls of kitchen for anti-fouling and cleaning. 2. Aluminum foil can be used to keep food fresh.
Q:How to measure the thickness of aluminium foil flake?
Measure the correlation value of aluminized paper with a dividing rule, then you can get the area(s) of it. Measure the mass of aluminized paper with a balance, then you can get its volumr by using the density formula m=PV(the density of aluminium can be gotten from density table).Finally, using the volume formula v=hs, you can get the thickness of it.
Q:Is it easy to recyle aluminium?
Recycling aluminum cans is fairly simple. Just bag/box them up and haul them in. Other types of aluminum can be a little more of a challenge. Like with aluminum siding or sheets of aluminum. Hope that helps.
Q:Why Does Wet Aluminum Stink? ?
Believe it or not, aluminum is a very reactive metal. In its normally encountered, dry form, aluminum reacts with the oxygen in the air to form aluminum oxide, which coats the metal and protects it from further reaction for the majority of household purposes. However, putting aluminum into water causes this oxide layer to be destroyed, allowing the aluminum metal to once again become reactive. From that point it may react with a host of other chemicals from acids to bases, forming different aluminum salts and gases that may be smelly, or catalyzing chemical reactions that too can stink. For an example of how reactive aluminum is compared to aluminum oxide, get some household lye (NaOH) pellets, some water and a piece of aluminum foil. Place some lye on top of the aluminum foil, and add a little bit of water. At first, it will appear as if nothing is happening - at this time however the water is destroying the aluminum oxide layer. When enough of the oxide layer is penetrated (usually within 30 seconds to a minute), the NaOH proceeds to react with the aluminum metal to release hydrogen gas. This reaction quite literally eats through the metal. Be careful when doing this experiment as NaOH is caustic and hydrogen gas is flammable.
Q:(Chemistry Problem) Analysis of a Magnesium-Aluminum Alloy Please help me?
let there be x gram of magnesium and y gram of aluminium in the magnesium-aluminium alloy so x + y = 0.25 ....(1) now reaction of magnesium with HCl... Mg + 2HCl ------ MgCl2 + H2.......(2) reaction of aluminium with HCl ... 2Al + 6HCl ------- 2AlCl3 + 3H2.........(3) so H2 is derived from both Al and Mg reactions with HCl.... calculating no. of moles of H2 produced from both reactions... atomic mass of Mg = 24.3 g/mole and atomic mass of Al = 27 g/mole from reaction (2)....we can say that 24.3 g of Mg produces 1 mole of H2 so x g of Mg will produce 1/24.3 X x = x/24.3 moles of H2 similarly from reaction (3)...we can say that 2 X 27 = 54 g of Al produces 3 moles of H2 so y g of Al will produce 3/54 X y = 3y/54 moles of H2 so total number of moes of H2 produced = 3y/54 + x/24.3 now calculating number of moles of H2 produced with the help of following equation... PV = nRT P (due to hydrogen) = total pressure - pressure due to water vapour = 752 - 30 = 722 torr = 722/760 = 0.95 atm (1 atm = 760 torr) V = 305 ml or 305/1000 = 0.305 L R = 0.0821 L atm /K/mole T = 29 + 273 = 302 K n = ? putting the values... 0.95 X 0.305 = n X 0.0821 X 302 n = 0.289/24.794 = 0.012 as total no. of moles = 3y/54 + x/24.3 .... so 3y/54 + x/24.3 = 0.012 .....(4) now we have two equations in x and y ....i.e. (1) and (4) which can be solved from eqn(4)... x/24.3 = 0.012 - 3y/54 x/24.3 = (0.012 X 54 - 3y)/54 x/24.3 = (0.648 - 3y) / 54 x = 24.3 X (0.648-3y)/54 = 0.45 (0.648 - 3y) putting this value of x in eqn (1) 0.45(0.648-3y) + y = 0.25 0.292 - 1.35y + y = 0.25 0.292 -0.35y = 0.25 0.292 - 0.25 = 0.35 y y = 0.042/0.35 = 0.12 g so x = 0.25-0.12 = 0.13 g so weight of Al = 0.12 g weight of Mg = 0.13 g mass % of Al = 0.12/0.25 X 100 = 48% please check the maths... also feel free to ask any questions..
Q:What's the aluminum sheet and its features?
After been hot-rolled and cold-rolled, aluminum slabs with a thickness of above 0.3mm can be called as aluminium plate or aluminium strip(with a rolled shape); with a thickness of less than 0.3mm can be called as aluminium foil or aluminium foil strip(with a rolled shape). Aluminium foil is usually made of the type 1 or type 2 industrial aluminum. Aluminiym foil has all features of metal aluminium. Heat conduction, gasproof, light insulation and electromagnetic radiation shield are all important features.
Q:Sheet Metal Question (Aluminum)?
Both Aluminum alloys are thermally hardened but 2024 T3 is softer than 6061 T3 hence the former is easier to roll. However, these alloys have relatively low fatigue limits and if bent at a very small radius, may crack. If you need an alluminum alloy that is more manageable to roll, try the strain hardened ones, the ones with an H hardening desination such as 5086 H32.
Q:How can you invest wisely in aluminium stocks?
I am just a student, so I wouldn't advise you to do more than confirm what I'm about to tell you with a licensed investment adviser before acting upon it. Firstly, the price of aluminium does impact the performance of the aluminium company's stock. This relationship, however, is not perfect and depends on the individual characteristics of the company. The relationship is more pronounced in companies that focus on only one element of production, such as extraction, as opposed to those that diversify their operations into other activities along the production line like refinement, etc. Secondly, about the input costs, sure they do affect metal producers (each differently from the next) as they do many other industries. However, the prices of metals and other commodities are likely to rise with any unanticipated inflation that may arise as a result of the current state of oil prices. So much so that that the effects of the oil price spike may be ignorable. Thirdly, in my opinion one year, is a short-term investment. In the long-term, however as long as your company survives I expect that it will do fine, meaning it may well be profitable. Volatility, however is a natural thing to all investments, but the risk-free ones and a premium is paid to all investors to compensate for this volatility, or risk as it is commonly called. What really matters at the end of the day is the long term trend, which is unknown but generally assumed to be positive. Lastly, if you really want to invest in the aluminium industry I suggest that you ask around about any Exchange Traded Fund or some other well diversified investment vehicle with a focus on Aluminium Producers or Aluminium itself. That would certainly be a safer way to participate in the Aluminium Industry, than investing in a single company.
Q:Aluminum reacts with oxygen gas to produce a single solid compound. If 16g of aluminum react with 24g of oxyg?
you opt for to understand the proscribing reactant= the reactant that produces smallest quantity of product the smallest quantity of product is the finest product 219 g AlF3/a million * a million mol AlF3/ 80 3.977 g AlF3 * 6 mol F2/ 4 mol AlF3 * 37.997 g F2/ a million mol F2= 149 g F2 40 8 g O2/ a million * a million mol O2/ 31.999 g O2 * 6 mol F2/ 3 mol O2* 37.997 g F2 / a million mol F2= 114 g F2 oxygen gasoline is the limitng reactant aluminum flouride is the added reactant some is ate up different there to verify all proscribing reactant is ate up

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