Aluminum foil for use lidding

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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%.

We provide a full range of precision aluminum strip for almost any application. We produce aluminum strip in a wide variety of alloys, including clad composites. Our aluminum strip can be produced in standard dimensions or custom made to your special requirements. We produce both imperial and metric units. We manufacture in compliance with the main international specifications, and tighter tolerances or custom tempers are available upon request. We offer various surface conditions, custom finishes (painting, anodizing, embossing), special processing, and multiple packaging options to meet our customer's unique requirements. The following is a summary of our capabilities.

Manufactured in compliance with the main international specifications and standards, including:  Aluminum Association, ASTM, EN, and DIN.
We can also manufacture in compliance with other international standards including:ASME, SAE, AMS, AWS, FED, MIL, QQ, ISO, BS, AFNOR, JIS and GOST.

Manufactured in compliance with the main international specifications and standards.
Tighter tolerances are available upon request.


Aluminium (or aluminum; see spelling differences) is a chemical element in the boron group with symbol Al and atomic number 13. It is a silvery white, soft, ductile metal. Aluminium is the third most abundant element (after oxygen and silicon), and the most abundant metal in the Earth's crust. It makes up about 8% by weight of the Earth's solid surface. Aluminium metal is so chemically reactive that native specimens are rare and limited to extreme reducing environments. Instead, it is found combined in over 270 different minerals.The chief ore of aluminium is bauxite.

Aluminium is remarkable for the metal's low density and for its ability to resist corrosion due to the phenomenon of passivation. Structural components made from aluminium and its alloys are vital to the aerospace industry and are important in other areas of transportation and structural materials. The most useful compounds of aluminium, at least on a weight basis, are the oxides and sulfates.

Despite its prevalence in the environment, no known form of life uses aluminium salts metabolically. In keeping with its pervasiveness, aluminium is well tolerated by plants and animals. Owing to their prevalence, potential beneficial (or otherwise) biological roles of aluminium compounds are of continuing interest.

The earliest citation given in the Oxford English Dictionary for any word used as a name for this element is alumium, which British chemist and inventor Humphry Davy employed in 1808 for the metal he was trying to isolate electrolytically from the mineral alumina. The citation is from the journal Philosophical Transactions of the Royal Society of London: "Had I been so fortunate as to have obtained more certain evidences on this subject, and to have procured the metallic substances I was in search of, I should have proposed for them the names of silicium, alumium, zirconium, and glucium."

Davy settled on aluminum by the time he published his 1812 book Chemical Philosophy: "This substance appears to contain a peculiar metal, but as yet Aluminum has not been obtained in a perfectly free state, though alloys of it with other metalline substances have been procured sufficiently distinct to indicate the probable nature of alumina."[69] But the same year, an anonymous contributor to the Quarterly Review, a British political-literary journal, in a review of Davy's book, objected to aluminum and proposed the name aluminium, "for so we shall take the liberty of writing the word, in preference to aluminum, which has a less classical sound."

The -ium suffix conformed to the precedent set in other newly discovered elements of the time: potassium, sodium, magnesium, calcium, and strontium (all of which Davy isolated himself). Nevertheless, -um spellings for elements were not unknown at the time, as for example platinum, known to Europeans since the 16th century, molybdenum, discovered in 1778, and tantalum, discovered in 1802. The -um suffix is consistent with the universal spelling alumina for the oxide (as opposed to aluminia), as lanthana is the oxide of lanthanum, and magnesia, ceria, and thoria are the oxides of magnesium, cerium, and thorium respectively.

The aluminum spelling is used in the Webster's Dictionary of 1828. In his advertising handbill for his new electrolytic method of producing the metal in 1892, Charles Martin Hall used the -um spelling, despite his constant use of the -ium spelling in all the patents[58] he filed between 1886 and 1903. It has consequently been suggested[by whom?] that the spelling reflects an easier-to-pronounce word with one fewer syllable, or that the spelling on the flyer was a mistake.[citation needed] Hall's domination of production of the metal ensured that aluminum became the standard English spelling in North America.


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Q:Are there mineral supplements containing aluminum available in local pharmacies?
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Q:Can I use the foil to steam the fish in the microwave?
Do not recommend the use of aluminum foil, this is one kind of metal, the microwave oven heated by microwave, microwave reflection effect of the metal will encounter, cooking, microwave cooking materials can be selected: A, B, C, glass ceramic, plastic film D.
Q:What are the classification of aluminum foil compound insulation material?
There are a variety of insulation materials with wide application. The commonly used ones include glass cotton products, heat insulation blankets and heat-insulated foam glass, polyurethane foam glass, etc. The glass cotton products are used in air conditioning insulation, duct insulation, polyurethane foams, extruded polystyrene board, molding of polystyrene, Bakelite resin, mineral fiber products, polyphenyl granule size, compound wood, soft wood, etc. Polyurethane foam is currently a kind of insulation material with minimum coefficient of heat conductivity of 0.018~0.024W/(m·k)in building insulation.
Q:Should the double shielded wires be shielded from the screen?
2. when the cable is double insulated and shielded, the outermost shield is grounded at both ends, and the inner layer is shielded at one end with equipotential grounding.
Q:Electromagnetic induction aluminum foil sealing machine is different from electromagnetic oven
The main frequency is not the same, in addition, the range of the magnetic field is not the same, the formation of unit magnetic flux is not the same, the frequency of the electromagnetic furnace is low, the unit magnetic flux is small, so the copper and aluminum and other conductive metal formed a small pot, it is difficult to heat
Q:How high can the aluminum foil tape be?
Mainly depends on the thickness of the aluminum foil with adhesive. High temperature tape and fiberglass tape, 200 degrees high temperature can withstand.
Q:What's the relationship among aluminum strip,aluminum foil and aluminium alloy strip?
Aluminum foil is the augmented products of aluminum strip.
Q:How does the fireproof performance of alunimun foil?
The fireproof performance of alunimun foil is very bad, because the aluminum foil isn't pure aluminum.
Q:What is the difference between the tin foil and aluminum foil?
Aluminum layer not in direct contact with food. How much metal tin containing a little lead from food hygiene, it is better than aluminum foil.
Q:How to prevent aluminum foil from wrinkling?
Due to the strip shape is serious bad, folding formed in the process of aluminum foil coiling or expanding. Its essence is that its tension is not enough to make the box surface flattening. For a device with the tension of 20 mpa, the box surface flatness shall not be greater than 301. When it is more than 301, it will wrinkle inevitably. Due to the rolling aluminum box often bear the bigger tension than follow-up processing, some aluminum foil that just show the bad strip shape when rolling turn to wrinkle when cutting or used after annealing. Main reasons of wrinkling are due to poor flatness controlling, including incorrect roll grinding ,unreasonable roll shape controlling, unreasonable parameter controlling of rolling and cutting process, bad incoming material strip shape and incorrect strip shape adjusting and imperfect precision of sleeve or tube core. Main reasons of wrinkles: The large amount of pressure make the rolling uneven or coiling lack tension. Improper controlling of roll shape or rolling pressure is too low; Uneven thickness of billet, bad flatness or shear wave. Winding shaft precision is not good and the sleeve is not round. Improper control of pressing roller pressure.

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